TRANSFER TAPE COMPRISING ADHESIVE FOR A PROTECTIVE WRAP |
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申请号 | US14759646 | 申请日 | 2014-01-16 | 公开(公告)号 | US20150367611A1 | 公开(公告)日 | 2015-12-24 |
申请人 | NIROTEK A.C.S. LTD; | 发明人 | Uri RIMON; | ||||
摘要 | The present invention provides in a protective wrap for a product to be left in the open air, a transfer tape 100 useful for joining said protective wrap's outer layer 210 to said protective wrap's inner layer 270, said transfer tape 100 having: a. at least one outer adhesive layer 120 adapted to adhere at least one UV protective film 130 to said protective wrap's outer layer 210; b. said at least one UV protective film 130 connected on a first side to said outer adhesive layer 120; and c. at least one inner adhesive layer 140 connected to a second side of said at least one UV protective film 130, said inner adhesive layer 140 adapted to adhere to said protective wrap's inner layer 270. | ||||||
权利要求 | |||||||
说明书全文 | The present invention generally pertains to a system and method for creating a product comprising an adhesive useful as a means of closure for a protective wrap for products stored for long periods of time in the open air. Agricultural products such as cotton are frequently harvested and baled and then left for up to several months in the open field. The baled products are exposed to extremes of temperature, rain, wind and sunlight, the UV in the last tending to degrade adhesives in the wrapping. Wind, and especially high temperatures can cause the wrapping to fail, exposing the product and allowing it to be scattered. There are many products in the prior art intended to bale such agricultural products. One of the better prior art wrap products comprises a wrap film which is applied in several layers, with an adhesive between the two outer layers. Although this product works reasonably well when applied under clean conditions, the dust, dirt and particles of crop tend to degrade the quality of the adhesive bond and can cause the wrap to fail under certain harsh conditions of extended open-air storage. It is therefore a long felt need to provide a product comprising an adhesive useful for creating a protective wrap for products stored for long periods of time in the open air. It is an object of the present invention to disclose a system and method for creating a product comprising an adhesive useful as a means of closure for a protective wrap for products stored for long periods of time in the open air. It is another object of the present invention to disclose, in a protective wrap for a product to be left in the open air, a transfer tape 100 useful for joining said protective wrap's outer layer 210 to said protective wrap's inner layer 270, said transfer tape 100 having:
It is another object of the present invention to disclose the transfer tape, wherein said transfer tape 100 is adherable to said protective wrap's outer layer 210 under industrial conditions and is adherable to said protective wrap's inner layer 270 under field conditions. It is another object of the present invention to disclose the transfer tape, wherein the thickness of said outer adhesive layer 120 is in the range of about 20 gm/m2 and about 60 gm/m2 of a first adhesive. It is another object of the present invention to disclose the transfer tape, wherein said first adhesive comprises a UV resistant adhesive. It is another object of the present invention to disclose the transfer tape, wherein the thickness of said inner adhesive layer 140 is in the range of about 50 gm/m2 and about 120 gm/m2 of a second adhesive. It is another object of the present invention to disclose the transfer tape, additionally comprising a layer of particulate UV blocking material 125. It is another object of the present invention to disclose the transfer tape, wherein said particulate UV blocking material 125 comprises at least one pigment. It is another object of the present invention to disclose the transfer tape, wherein said at least one pigment comprises a member of a group consisting of titanium oxide, zinc oxide and any combination thereof. It is another object of the present invention to disclose the transfer tape, wherein said at least one outer adhesive layer 120 additionally comprises at least one UV protective material. It is another object of the present invention to disclose the transfer tape, wherein said at least one UV protective material comprises an additive selected from a group consisting of: UVA reflectors, UVB reflectors, UVA absorbers, UVB absorbers, and any combination thereof. It is another object of the present invention to disclose the transfer tape, wherein said at least one UV protective material comprises at least one photostabilizer. It is another object of the present invention to disclose the transfer tape, wherein said at least one photo stabilizer comprises HALS (hindered amine light stabilizer). It is another object of the present invention to disclose a protective wrap for a product to be left in the open air comprising
It is another object of the present invention to disclose the protective wrap, wherein said protective wrap's outer layer 210 is adherable to said transfer tape 100 under industrial conditions and said protective wrap's inner layer 270 is adherable to said transfer tape 100 under field conditions. It is another object of the present invention to disclose the protective wrap, wherein the thickness of said outer adhesive layer 120 of said transfer tape 100 is in the range of about 20 gm/m2 and about 60 gm/m2 of a first adhesive. It is another object of the present invention to disclose the protective wrap, wherein said first adhesive comprises a UV resistant adhesive. It is another object of the present invention to disclose the protective wrap, wherein the thickness of said inner adhesive layer 140 of said transfer tape 100 is in the range of about 50 gm/m2 and about 120 gm/m2 of a second adhesive. It is another object of the present invention to disclose the protective wrap, additionally comprising a layer of particulate UV blocking material 125. It is another object of the present invention to disclose the protective wrap, wherein said particulate UV blocking material 125 comprises at least one pigment. It is another object of the present invention to disclose the protective wrap, wherein said at least one pigment comprises a member of a group consisting of titanium oxide, zinc oxide and any combination thereof. It is another object of the present invention to disclose the protective wrap, wherein said at least one outer adhesive layer 120 additionally comprises at least one UV protective material. It is another object of the present invention to disclose the protective wrap, wherein said at least one UV protective material comprises an additive selected from a group consisting of: UVA reflectors, UVB reflectors, UVA absorbers, UVB absorbers, and any combination thereof. It is another object of the present invention to disclose the protective wrap, wherein said at least one UV protective material comprises at least one photostabilizer. It is another object of the present invention to disclose the protective wrap, wherein said at least one photostabilizer comprises HALS (hindered amine light stabilizer). It is another object of the present invention to disclose a transfer tape product for storage and transportation of a transfer tape 100 comprising:
It is another object of the present invention to disclose the transfer tape product, wherein the thickness of said outer adhesive layer 120 is in the range of about 20 gm/m2 and about 60 gm/m2 of a first adhesive. It is another object of the present invention to disclose the transfer tape product, wherein said first adhesive comprises a UV resistant adhesive. It is another object of the present invention to disclose the transfer tape product, wherein the thickness of said inner adhesive layer 140 is in the range of about 50 gm/m2 and about 120 gm/m2 of a second adhesive. It is another object of the present invention to disclose the transfer tape product, additionally comprising a layer of particulate UV blocking material 125. It is another object of the present invention to disclose the transfer tape product, wherein said particulate UV blocking material 125 comprises at least one pigment. It is another object of the present invention to disclose the transfer tape product, wherein said at least one pigment comprises a member of a group consisting of titanium oxide, zinc oxide and any combination thereof. It is another object of the present invention to disclose the transfer tape product, wherein said at least one outer adhesive layer 120 additionally comprises at least one UV protective material. It is another object of the present invention to disclose the transfer tape product, wherein said at least one UV protective material comprises an additive selected from a group consisting of: UVA reflectors, UVB reflectors, UVA absorbers, UVB absorbers, and any combination thereof. It is another object of the present invention to disclose the transfer tape product, wherein said at least one UV protective material comprises at least one photo stabilizer. It is another object of the present invention to disclose the transfer tape product, wherein said at least one photostabilizer comprises HALS (hindered amine light stabilizer). It is another object of the present invention to disclose a method of producing a transfer tape 100 comprising steps of:
It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of said outer adhesive layer 120 to be in the range of about 20 gm/m2 and about 60 gm/m2 of a first adhesive material. It is another object of the present invention to disclose the method, additionally comprising steps of selecting a UV resistant adhesive for said outer adhesive layer 120. It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of said inner adhesive layer 140 to be in the range of about 50 gm/m2 and about 120 gm/m2 of a second adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of providing said transfer tape 100 with a layer of particulate UV blocking material 125. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said particulate UV blocking material 125 to be at least one pigment. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one pigment from a group consisting of titanium oxide, zinc oxide and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of providing at least one UV protective material within said at least one outer adhesive layer 120. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one UV protective material to be an additive selected from a group consisting of: UVA reflectors, UVB reflectors, UVA absorbers, UVB absorbers, and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of providing at least one photostabilizer as said at least one UV protective material. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one photostabilizer to be HALS (hindered amine light stabilizer). It is another object of the present invention to disclose a method for producing a protective wrap for a product to be left in the open air, said method comprising steps of:
It is another object of the present invention to disclose the method, wherein said steps of adhering said protective wrap's outer layer 210 to a first side of said outer adhesive layer 120 are carried out under industrial conditions and said steps of adhering said protective wrap's inner layer 270 to a second side of said inner adhesive layer 140 are carried out under field conditions. It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of said outer adhesive layer 120 to be in the range of about 20 gm/m2 and about 60 gm/m2 of a first adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of selecting a UV resistant adhesive for said first adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of said inner adhesive layer 140 to be in the range of about 50 gm/m2 and about 120 gm/m2 of a second adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of providing said protective wrap with a layer of particulate UV blocking material 125. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said particulate UV blocking material 125 to be at least one pigment. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one pigment from a group consisting of titanium oxide, zinc oxide and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of providing at least one UV protective material within said at least one outer adhesive layer 120. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one UV protective material to be an additive selected from a group consisting of: UVA reflectors, UVB reflectors, UVA absorbers, UVB absorbers, and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of providing at least one photostabilizer as said at least one UV protective material. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one photostabilizer to be HALS (hindered amine light stabilizer). It is another object of the present invention to disclose a method of producing a protective wrap for a product to be left in the open air comprising steps of:
f. adhering a first side of said transfer tape 100 to said outer protective layer 210 wherein said transfer tape 100 comprises at least one outer adhesive layer 120 adapted to adhere a first side of at least one UV protective film 130 to said outer protective layer 210; and at least one inner adhesive layer 140 connected to a second side of said at least one UV protective film 130. It is another object of the present invention to disclose the method, wherein said steps of adhering said protective wrap's outer layer 210 to a first side of said outer adhesive layer 120 are carried out under industrial conditions and said steps of adhering said protective wrap's inner layer 270 to a second side of said inner adhesive layer 140 are carried out under field conditions. It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of said outer adhesive layer 120 to be in the range of about 20 gm/m2 and about 60 gm/m2 of a first adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of selecting a UV resistant adhesive for said first adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of said inner adhesive layer 140 to be in the range of about 50 gm/m2 and about 120 gm/m2 of a second adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of providing said protective wrap with a layer of particulate UV blocking material 125. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said particulate UV blocking material 125 to be at least one pigment. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one pigment from a group consisting of titanium oxide, zinc oxide and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of providing at least one UV protective material within said at least one outer adhesive layer 120. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one UV protective material to be an additive selected from a group consisting of: UVA reflectors, UVB reflectors, UVA absorbers, UVB absorbers, and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of providing at least one photostabilizer as said at least one UV protective material. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one photostabilizer to be HALS (hindered amine light stabilizer). It is another object of the present invention to disclose a method of producing a transfer tape product useful for storage and transportation of a transfer tape 100 comprising steps of:
It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of said outer adhesive layer 120 to be in the range of about 20 gm/m2 and about 60 gm/m2 of a first adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of selecting a UV resistant adhesive material for said first adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of the inner adhesive layer 140 to be in the range of about 50 gm/m2 and about 120 gm/m2 of a second adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of providing said transfer tape product with a layer of particulate UV blocking material 125. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said particulate UV blocking material 125 to be at least one pigment. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one pigment from a group consisting of titanium oxide, zinc oxide and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of providing at least one UV protective material within said at least one outer adhesive layer 120. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one UV protective material to be an additive selected from a group consisting of: UVA reflectors, UVB reflectors, UVA absorbers, UVB absorbers, and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of providing at least one photostabilizer as said at least one UV protective material. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one photostabilizer to be HALS (hindered amine light stabilizer). It is another object of the present invention to disclose, in a protective wrap for a product to be left in the open air, a transfer tape 800 useful for joining said protective wrap's outer layer 210 to said protective wrap's inner layer 270, said transfer tape 800 having:
It is another object of the present invention to disclose the transfer tape, wherein said particulate UV blocking material 125 comprises at least one pigment. It is another object of the present invention to disclose the transfer tape, wherein said at least one pigment comprises a member of a group consisting of titanium oxide, zinc oxide and any combination thereof. It is another object of the present invention to disclose the transfer tape, wherein said at least one UV protective material comprises an additive selected from a group consisting of: UVA reflectors, UVB reflectors, UVA absorbers, UVB absorbers, and any combination thereof. It is another object of the present invention to disclose the transfer tape, wherein said at least one UV protective material comprises at least one photostabilizer. It is another object of the present invention to disclose the transfer tape, wherein said at least one photostabilizer comprises HALS (hindered amine light stabilizer). It is another object of the present invention to disclose the transfer tape, wherein said transfer tape 800 is adherable to said protective wrap's outer layer 210 under industrial conditions and to said protective wrap's inner layer 270 under field conditions. It is another object of the present invention to disclose the transfer tape, wherein the thickness of said outer adhesive layer 120 is in the range of about 20 gm/m2 and about 60 gm/m2 of a first adhesive. It is another object of the present invention to disclose the transfer tape, wherein said first adhesive comprises a UV resistant adhesive. It is another object of the present invention to disclose the transfer tape, wherein the thickness of said inner adhesive layer 140 is in the range of about 50 gm/m2 and about 120 gm/m2 of a second adhesive. It is another object of the present invention to disclose a protective wrap for a product to be left in the open air comprising
It is another object of the present invention to disclose the protective wrap, wherein said particulate UV blocking material 125 comprises at least one pigment. It is another object of the present invention to disclose the protective wrap, wherein said at least one pigment comprises a member of a group consisting of titanium oxide, zinc oxide and any combination thereof. It is another object of the present invention to disclose the protective wrap, wherein said at least one UV protective material comprises an additive selected from a group consisting of: UVA reflectors, UVB reflectors, UVA absorbers, UVB absorbers, and any combination thereof. It is another object of the present invention to disclose the protective wrap, wherein said at least one UV protective material comprises photostabilizers. It is another object of the present invention to disclose the protective wrap, wherein said photostabilizers comprise HALS (hindered amine light stabilizer). It is another object of the present invention to disclose the protective wrap, wherein said transfer tape 800 is adherable to said protective wrap's outer layer 210 under industrial conditions and is adherable to said protective wrap's inner layer 270 under field conditions. It is another object of the present invention to disclose the protective wrap, wherein the thickness of said outer adhesive layer 120 is in the range of about 20 gm/m2 and about 60 gm/m2 of a first adhesive. It is another object of the present invention to disclose the protective wrap, wherein said first adhesive comprises a UV resistant adhesive. It is another object of the present invention to disclose the protective wrap, wherein the thickness of said inner adhesive layer 140 is in the range of about 50 gm/m2 and about 120 gm/m2 of a second adhesive. It is another object of the present invention to disclose a transfer tape product for storage and transportation of a transfer tape 800, said transfer tape product comprising:
It is another object of the present invention to disclose the transfer tape product, wherein said particulate UV blocking material 125 comprises at least one pigment. It is another object of the present invention to disclose the transfer tape product, wherein said at least one pigment comprises a member of a group consisting of titanium oxide, zinc oxide and any combination thereof. It is another object of the present invention to disclose the transfer tape product, wherein said at least one UV protective material comprises an additive selected from a group consisting of: UVA reflectors, UVB reflectors, UVA absorbers, UVB absorbers, and any combination thereof. It is another object of the present invention to disclose the transfer tape product, wherein said at least one UV protective material comprises photostabilizers. It is another object of the present invention to disclose the transfer tape product, wherein said photostabilizers comprise HALS (hindered amine light stabilizer). It is another object of the present invention to disclose the transfer tape product, wherein said transfer tape 800 is adherable to said protective wrap's outer layer 210 under industrial conditions and is adherable to said protective wrap's inner layer 270 under field conditions. It is another object of the present invention to disclose the transfer tape product, wherein the thickness of said outer adhesive layer 120 is in the range of about 20 gm/m2 and about 60 gm/m2 of a first adhesive. It is another object of the present invention to disclose the transfer tape product, wherein said first adhesive comprises a UV resistant adhesive. It is another object of the present invention to disclose the transfer tape product, wherein the thickness of said inner adhesive layer 140 is in the range of about 50 gm/m2 and about 120 gm/m2 of a second adhesive. It is another object of the present invention to disclose a method of producing a transfer tape 800, comprising steps of:
It is another object of the present invention to disclose the method, additionally comprising steps of selecting said particulate UV blocking material 125 to be at least one pigment. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one pigment from a group consisting of titanium oxide, zinc oxide and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one UV protective material to be an additive selected from a group consisting of: UVA reflectors, UVB reflectors, UVA absorbers, UVB absorbers, and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of providing at least one photostabilizer as said at least one UV protective material. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one photostabilizer to be HALS (hindered amine light stabilizer). It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of said outer adhesive layer 120 to be in the range of about 20 gm/m2 and about 60 gm/m2 of a first adhesive material. It is another object of the present invention to disclose the method, additionally comprising steps of selecting a UV resistant adhesive material for said first adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of said inner adhesive layer 140 to be in the range of about 50 gm/m2 and about 120 gm/m2 of a second adhesive. It is another object of the present invention to disclose the method, wherein said step attaching at least one outer adhesive layer 120 to a second side of said inner adhesive layer 140 via a non-contact coating method. It is another object of the present invention to disclose the method, wherein said non-contact coating method is curtain coating. It is another object of the present invention to disclose a method for producing a protective wrap for a product to be left in the open air, said method comprising steps of:
It is another object of the present invention to disclose the method, additionally comprising steps of selecting said particulate UV blocking material 125 to be at least one pigment. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one pigment from a group consisting of titanium oxide, zinc oxide and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one UV protective material to be an additive selected from a group consisting of: UVA reflectors, UVB reflectors, UVA absorbers, UVB absorbers, and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of providing at least one photostabilizer as said at least one UV protective material. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one photostabilizer to be HALS (hindered amine light stabilizer). It is another object of the present invention to disclose the method, wherein said steps of adhering said protective wrap's outer layer 210 to a first side of said outer adhesive layer 120 are carried out under industrial conditions and said steps of adhering said protective wrap's inner layer 270 to a second side of said inner adhesive layer 140 are carried out under field conditions. It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of said outer adhesive layer 120 to be in the range of about 20 gm/m2 and about 60 gm/m2 of a first adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of selecting a UV resistant adhesive for said first adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of said inner adhesive layer 140 to be in the range of about 50 gm/m2 and about 120 gm/m2 of a second adhesive. It is another object of the present invention to disclose a method of producing a protective wrap for a product to be left in the open air comprising steps of:
It is another object of the present invention to disclose the method, additionally comprising steps of selecting said particulate UV blocking material 125 to be at least one pigment. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one pigment from a group consisting of titanium oxide, zinc oxide and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one UV protective material to be an additive selected from a group consisting of: UVA reflectors, UVB reflectors, UVA absorbers, UVB absorbers, and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of providing at least one photostabilizer as said at least one UV protective material. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one photostabilizer to be HALS (hindered amine light stabilizer). It is another object of the present invention to disclose the method, wherein said steps of adhering said protective wrap's outer layer 210 to a first side of said outer adhesive layer 120 are carried out under industrial conditions and said steps of adhering said protective wrap's inner layer 270 to a second side of said inner adhesive layer 140 are carried out under field conditions. It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of said outer adhesive layer 120 to be in the range of about 20 gm/m2 and about 60 gm/m2 of a first adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of selecting a UV resistant adhesive for said first adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of said inner adhesive layer 140 to be in the range of about 50 gm/m2 and about 120 gm/m2 of a second adhesive. It is another object of the present invention to disclose a method of producing a transfer tape product useful for storage and transportation of a transfer tape comprising steps of:
It is another object of the present invention to disclose the method, additionally comprising steps of selecting said particulate UV blocking material 125 to be at least one pigment. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one pigment from a group consisting of titanium oxide, zinc oxide and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one UV protective material to be an additive selected from a group consisting of: UVA reflectors, UVB reflectors,, UVA absorbers, UVB absorbers,, and any combination thereof. It is another object of the present invention to disclose the method, additionally comprising steps of providing at least one photostabilizer as said at least one UV protective material. It is another object of the present invention to disclose the method, additionally comprising steps of selecting said at least one photostabilizer to be HALS (hindered amine light stabilizer). It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of said outer adhesive layer 120 to be in the range of about 20 gm/m2 and about 60 gm/m2 of a first adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of selecting a UV resistant adhesive material for said first adhesive. It is another object of the present invention to disclose the method, additionally comprising steps of selecting the thickness of the inner adhesive layer 140 to be in the range of about 50 gm/m2 and about 120 gm/m2 of a second adhesive. It is another object of the present invention to disclose the method, wherein said step attaching at least one outer adhesive layer 120 to a second side of said inner adhesive layer 140 via a non-contact coating method. It is another object of the present invention to disclose the method, wherein said non-contact coating method is curtain coating. In order to better understand the invention and its implementation in practice, a plurality of embodiments will now be described, by way of non-limiting example only, with reference to the accompanying drawings, wherein The following description is provided, alongside all chapters of the present invention, so as to enable any person skilled in the art to make use of said invention and sets forth the best modes contemplated by the inventor of carrying out this invention. Various modifications, however, will remain apparent to those skilled in the art, since the generic principles of the present invention have been defined specifically to provide a means and method for creating a product comprising an adhesive useful as a means of closure for a protective wrap for products stored for long periods of time in the open air. The term ‘industrial conditions’ hereinafter refers to controlled production conditions, such as are typically found in a factory. Typically, industrial conditions include at least some control of temperature, air cleanliness and surface cleanliness. Typically, under industrial conditions, no free water, free grease or free oil is present, and neither are chaff or other plant products, or pebbles, dirt, grit or other contaminants, The term ‘field conditions’ hereinafter refers to uncontrolled production conditions, such as occur, for non-limiting example, during harvesting in an open field. Under field conditions, it is not feasible to control factors such as, but not limited to, dampness of the product, temperature, presence of free water, free grease or free oil, or presence of contaminants such as chaff or other plant products, pebbles, dirt, or grit. The term ‘inner’ hereinafter refers to an item closer to the center of the cotton bale or other wrapped object than another, similar item. The term ‘outer’ hereinafter refers to an item further from the center of the cotton bale or other wrapped object than another, similar item. For non-limiting example, the inner wrap layer is closer to the center of the wrapped item than the outer wrap layer; the outer wrap layer at least partially covers the inner wrap layer and so that the outer wrap layer protects the covered portions of the inner wrap layer from the elements. The term ‘about’ hereinafter refers to a range of 25% around a given value. Throughout, the same number will refer to the same object, and similar numbers refer to objects with similar functions. The present invention discloses a system and method for producing a transfer tape which is capable of serving as a closure tape for a protective wrap to be used in outdoor and agricultural applications, such as, for non-limiting example, for the baling and storage of crops such as cotton. Such a wrap must satisfy several criteria:
The transfer tape of the present invention, when used in conjunction with appropriate wrapping films, provides a protective wrapping that satisfies the above criteria. The transfer tape is intended to be transformed into a protective wrap in stages. The end product of the first stage, produced under industrial conditions, is a transfer tape product with at least external releasable cover layers and, in preferred embodiments, at least one internal releasable separation (carrier) layer. This transfer tape product is capable of withstanding both rough handling and long-term storage without losing efficacy. During the second stage, also carried out under industrial conditions, the external cover layers are removed from the transfer tape product and are replaced with wrapping material. It is during this stage that the outer adhesive layer is adhered to the outer wrap layer. At this stage, the inner wrap layer is adhered to a third adhesive layer, not to the inner adhesive layer. The inner wrap layer remains releasably attached to an internal releasable separation (carrier) layer. During the third stage, carried out under field conditions, the second stage product is wrapped around the material to be protected, the remaining separation (carrier) layer or layers are detached, and the portions of the final wrap (disjoint after removal of the separation layer(s)) are joined together by means of the freshly-exposed adhesive layer(s), forming the final protective wrap. All of these stages are described in more detail herein below. An embodiment of the transfer tape (100) is shown in In preferred embodiments, the adhesives are pressure-sensitive adhesives. However, adhesives used for the adhesive layers can be any adhesive known in the art with the desired properties, as described hereinbelow. Typically, the outer adhesive layer (120) comprises an acrylic adhesive and the inner adhesive layer (140) comprises a rubber-based adhesive. However, any UV-resistant and water-resistant adhesive of suitable strength can be used in the outer adhesive layer (120) and any water-resistant adhesive of suitable strength can be used in the inner adhesive layer (140). The outer adhesive layer (120) can comprise a UV-cured adhesive, a solvent-borne adhesive, a water-borne adhesive or a hot-melt (solvent-less) adhesive. In order to increase the UV protection provided to the inner adhesive layer (140), the outer adhesive layer (120) can comprise additives to block UV radiation. If the outer adhesive layer (120) comprises a UV-cured adhesive, the additives can block or absorb UVA (wavelengths 320-400 nm) and UVB radiation (wavelengths 280-320 nm) but must not block or absorb UVC radiation (wavelengths 100-280 nm), which induces crosslinking of the adhesive. The outer adhesive layer can also comprise components such as photostabilizers exemplified by, but not limited to, HALS—hindered amine light stabilizers, as well as free radical scavengers and quenchers, which slow down the degradation of UVA/UVB absorbers and of the adhesive itself. If the outer adhesive layer (120) is not UV-cured, it can additionally comprise physical light blockers, typically pigments such as, but not limited to, titanium oxide or zinc oxide. UV protection can be further increased by addition of at least one ultra-thin layer of particulate UV blocking material (not shown), either in conjunction with or in place of a UV protective film (130), with the layer(s) thin enough to allow a large interface between the adhesive layers (120, 140) to which it is adjacent, so that good bonding between the layer(s) (120, 140) is achieved. A protective wrap comprising the transfer tape is shown wrapping an exemplary bale of cotton (not to scale) in In preferred embodiments, the external releasable cover layers comprise glassine release liner. In other embodiments, they can comprise any flexible releasable film with sufficient strength to withstand handling. In preferred embodiments, the internal release liner (carrier layer) comprises PET film. In other embodiments, it can comprise any flexible releasable film with sufficient strength to withstand being mechanically separated from the transfer tape. In preferred embodiments, the UV protective film blocks UV radiation by reflection and/or absorbance, thus protecting the inner adhesive. The UV protective film can be comprised of a polyester film, or any other highly flexible film that permanently bonds to the desired adhesives. In preferred embodiments, the flexibility of the UV protective film is adjusted to minimize shearing forces caused by mismatch between the flexibility of the UV protective film and the flexibility of the wrap layers. This flexibility adjustment can be obtained by mechanical means, by chemical means, or by a combination thereof. Mechanical means typically comprise changing the thickness of the film or selecting a different film material. Chemical means include changing the fraction of plasticizers, fillers or binders in the film material, thereby changing the amount of cross-linking between polymer chains, or changing the molecular weight of the polymer chains—shorter (lighter) chains tend to be more flexible. The outer adhesive layer (120), which, in the final protective wrapping, is outside the protection of the UV protective film, has the following properties:
The inner adhesive layer, which, in the final protective wrapping, is inside the UV protective film, has the following properties:
As described hereinabove, production of the wrapped product occurs in several stages, with the output of Stage 1 being a transfer tape product (500, The exemplary production flow presented herein (Stages 1-3) for a transfer tape product (500, The transfer tape product (500) can withstand handling, transportation and storage for an indefinite length of time (the transfer tape is guaranteed for 2 years from tape production until the end of use in the field) and it is envisaged that the transfer tape product (500) will be marketed. In order to form the protective wrap, two additional stages, Stage 2 and Stage 3, are required. It is intended that Stage 2, like Stage 1, occurs under controlled conditions, for example, in a customer's factory, where temperature and cleanliness are controlled and there is an absence of free water, although control of humidity is not necessary. During Stage 2, the white (370) and yellow (510) release liners are removed from the transfer tape product (500); for convenience, the transfer tape product without release liners will be referred to as the linking tape (100, 672). After removal of the release liners (370, 510), the leading edge of one piece of wrap film (210, 270) is bonded to the freshly-exposed side of the permanent adhesive layer (360) on the inner side of the linking tape (100, 672), while the trailing edge of a second piece of wrap film (210, 270) is bonded to the freshly-exposed side of the outer adhesive layer (120). It should be noted that the portion of the linking tape (100, 672) bonded to the leading edge of a piece of wrap film (210, 270) is bonded to the outer side of the piece of wrap film (210, 270), while the portion of the linking tape (100, 672) bonded to the trailing edge of the piece of wrap film (210, 270) is bonded to the inner side of the piece of wrap film (210, 270). As the wrap film (210, 270) is intended to go approximately two times around the cotton bale or other wrapped object, for convenience, the portion of the wrap film (210, 270) intended to form the inner layer of the final wrap will be referred to herein as the inner wrap layer (270) and the portion of the wrap film (210, 270) intended to form the outer layer of the final wrap will be referred to herein as the outer wrap layer (210). The width of the transfer tape is preferably at least 75% of the width of the wrap film, so the transfer tape extends at least ¾ of the way across at each end of the wrap film. The transfer tape is preferably positioned such that its center is approximately at the center of the width of the wrap film. Typically, a portion of transfer tape is attached to the leading edge of one piece of wrap film (210, 270) and also to the trailing edge of a second piece of wrap film (210, 270). Therefore, production of wrap-ready material will result in a plurality of wraps linked end-to-end. Removal of the release liners (370, 510) and attachment of the wrap film (210, 270) creates a wrap-ready product 600, as shown in In The wrap-ready product can withstand handling, transportation, and storage for an indefinite length of time (it is guaranteed for 2 years). To be used, it is transported to the packing environment, usually an open field. In the field, the PET release liner (350) is removed, exposing the inner adhesive layer (140). The freshly-exposed adhesive layer (140) is then adhered to the wrap film (270), forming the final product, a protective wrap (200), as shown in A schematic of an embodiment of an exemplary route (700) for adhering the inner adhesive layer (140) to the wrap film (210, 270) is shown schematically in In As the bale (290) continues to rotate, the transfer tape (100) and the outer tape layer (672) separate completely. The wrap film (210, 270) continues to wrap around the bale, forming an inner wrap layer (270) and an outer wrap layer (210). During completion of the second wrap, the transfer tape (100) at the end of the outer wrap layer (210) will be adhered to the inner wrap layer (270), thereby creating protective wrap 900. It should be noted that a “tag” of wrap-ready product, comprising the inner tape layers (672), is left at the leading edge of the inner wrap layer (270). Completion of two 360° rotations envelopes the bale (290) in a protective wrap (200) comprising two layers of wrapping film bonded together by a transfer tape (100). The transfer tape (100), which bonds the trailing end (270) of the wrap film to the inner wrap layer (210) comprises at least one internal UV protective layer (130) and at least one inner (140) and at least one outer (120) adhesive layer, where the outer adhesive layer (120) was bonded under controlled conditions and the inner adhesive layer (140) bonded under field conditions. Therefore, the inner adhesive layer (140) is protected from wind, UV and wet, except at the edges, by the UV protective film (130) and the outer wrap layer (210), thereby providing a protective wrapping that can last up two years under field conditions. Other embodiments of the transfer tape (800) are shown in For clarity, the ultra-thin layer of particulate UV blocking material (125) will not be shown in the figures hereinbelow. Typically, the outer adhesive layer (120) comprises an acrylic adhesive and the inner adhesive layer (140) comprises a rubber-based adhesive. However, any UV-resistant and water-resistant adhesive of suitable strength can be used in the outer adhesive layer (120) and any water-resistant adhesive of suitable strength can be used in the inner adhesive layer (140). The outer adhesive layer (120) can comprise a UV-cured adhesive, a solvent-borne adhesive a water-borne adhesive or a hot-melt (solvent-less) adhesive. The types of additives used to block the UV radiation from reaching the inner adhesive layer (140) will depend on the type of adhesive used in the outer adhesive layer (120). If the outer adhesive layer (120) comprises a UV-cured adhesive, the additives can block or absorb UVA and UVB radiation but must not block or absorb UVC radiation, which induces crosslinking of the adhesive. The outer adhesive layer can also comprise components such as photostabilizers, exemplified by, but not limited to, HALS—hindered amine light stabilizers, as well as free radical scavengers and quenchers, which slow down the degradation of UVA/UVB absorbers and of the adhesive itself. If the outer adhesive layer (120) is not UV-cured, it can additionally comprise physical light blockers, typically pigments such as, but not limited to, titanium oxide or zinc oxide. In some variants of embodiments without a UV protective film (130), UV protection would be provided by an ultra-thin layer of particulate UV blocking material ( A protective wrap (900) comprising the transfer tape is shown wrapping an exemplary bale of cotton (not to scale) in In preferred embodiments, the external releasable cover layers comprise glassine release liner. In other embodiments, they can comprise any flexible releasable film with sufficient strength to withstand handling. In preferred embodiments, the internal release liner (carrier layer) comprises PET film. In other embodiments, it can comprise any flexible releasable film with sufficient strength to withstand being mechanically separated from the transfer tape. As described above, the outer adhesive layer (120) has the following properties:
As described above, the inner adhesive layer (140), which, in the final protective wrapping, is protected by at least one UV protective layer, has the following properties:
As described hereinabove, production of the wrapped product occurs in several stages, with the output of Stage 1 being a transfer tape product (1100, The exemplary production flow presented herein (Stages 1-3) for a transfer tape product (1100, In the exemplary production flow presented herein for a transfer tape product without UV protective film (800), Stage 1 has only two steps; there is no sub-product analogous to sub-product 2 (400), as this would entail a sub-product with an exposed adhesive layer. Therefore, the steps in Stage 1 for the exemplary production flow for the product without UV protective film (800) will be referred to as steps A and B. It should be noted that, in this exemplary production flow, sub-product 1 (1000) has a layer structure identical to that of sub-product 1 of Step 1 of Stage 1 (300) for the product with UV protective film (130). In preferred embodiments, the inner adhesive (140) is coated with an ultra-thin layer (125, not shown) of UV-protective particulate material, before the outer adhesive (120) is applied. The transfer tape product (1100) can withstand handling, transportation and storage for an indefinite length of time (the transfer tape is guaranteed for 2 years from tape production until the end of use in the field) and it is envisaged that the transfer tape product (1200) will be marketed. In order to form the protective wrap, two additional stages, Stage 2 and Stage 3, are required. It is intended that Stage 2, like Stage 1, occurs under controlled conditions, for example, in a customer's factory, where temperature and cleanliness are controlled and there is an absence of free water, although control of humidity is not necessary. During stage 2, the white (370) and yellow (510) release liners are removed from the transfer tape product (500), After removal of the release liners (370, 510), the leading edge of one piece of wrap material (210, 270) is bonded to the freshly-exposed side of the permanent adhesive layer (360) on the inner side of the linking tape (800, 672), while the trailing edge of a second piece of wrap material (210, 270) is bonded to the freshly-exposed side of the outer adhesive layer (120). As described hereinabove, the portion of the linking tape (800, 672) bonded to the leading edge of a piece of wrap material (210, 270) is bonded to the outer side of the piece of wrap material (210, 270), while the portion of the linking tape (800, 672) bonded to the trailing edge of the piece of wrap material (210, 270) is bonded to the inner side of the piece of wrap material (210, 270). The width of the transfer tape is preferably at least 75% of the width of the wrap material, so the transfer tape extends at least ¾ of the way across at each end of the wrap film. The transfer tape is preferably positioned such that its center is approximately at the center of the width of the wrap film. As described hereinabove, using this method of production of wrap-ready material will result in a plurality of wraps linked end-to-end. Removal of the release liners (370, 510) and attachment of the wrap material (210, 270) creates a wrap-ready product (1200), as shown in In The wrap-ready product can withstand handling, transportation, and storage for an indefinite length of time (it is guaranteed for 2 years). To be used, it is transported to the packing environment, usually an open field. In the field, the PET release liner 350 is removed, exposing the inner adhesive layer (140). The freshly-exposed adhesive layer (140) is then adhered to the wrap film (270), forming the final product, a protective wrap, as shown in A schematic of an embodiment of an exemplary route (1300) for adhering the inner adhesive layer (140) to the wrap film (210, 270) is shown schematically in In the exemplary embodiment shown schematically in In As the bale (290) continues to rotate, the transfer tape (800) and the outer tape layer (672) separate completely. The wrap film (210, 270) continues to wrap around the bale, forming an inner wrap layer (270) and an outer wrap layer (210). During completion of the second wrap, the transfer tape (800) at the end of the outer wrap layer (210) will be adhered to the inner wrap layer (270), thereby creating protective wrap 900. It should be noted that a “tag” of wrap-ready product, comprising the inner tape layers (672), is left at the leading edge of the inner wrap layer (270). Completion of two 360° rotations envelopes the bale (290) in a protective wrap (900) comprising two layers of wrapping film bonded together by a transfer tape (800). The transfer tape (800) which bonds the trailing end of the wrap film (270) to the inner wrap layer (210) comprises inner (140) and outer (120) adhesive layers, where the outer (120) was bonded under controlled conditions and the inner (140) bonded under field conditions. The transfer tape (800) also comprises UV protection for the inner (140) adhesive layer, either as part of the outer adhesive layer (120) or as an ultra-thin layer of particles between the at least two adhesive layers. Therefore, the inner adhesive layer (140) is protected from wind, UV and wet, except at the edges, by the UV protection and the outer wrap layer, thereby providing a protective wrapping that can last up two years under field conditions. Methods of producing a laminate structure comprising two or more contacting adhesive layers include, but are not limited to:
The two coatings (140, 120) would be performed consecutively inline (in one machine run). After the second coating, a laminating step would be performed, as described hereinabove.
One non-limiting method of producing a laminate structure comprising two or more contacting adhesive layers separated only by an ultrathin particulate layer comprises:
As described hereinabove, the UV protection can comprise a UV protective film 130, UV protective material within the outer adhesive layer (120), an ultra-thin layer of particulate UV blocking material (125), and any combination thereof. For non-limiting example, in an embodiment where a UV protective film (130) forms the main means of UV protection, the UV protection provided by the UV protective film (130) can be reduced and the full measure of UV protection restored using UV blocking or UV absorbing constituents in the outer adhesive layer (120). |