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Method of producing shrink-stabilized composite fabrics

阅读:884发布:2023-04-06

专利汇可以提供Method of producing shrink-stabilized composite fabrics专利检索,专利查询,专利分析的服务。并且The disclosure relates to the shrink-stabilization of laminated and bonded fabrics, herein referred to as composite fabrics, by mechanical compressive shrinkage techniques adapted especially to handle the composite material. The disclosure also relates in part to a new product, in the form of a shrink-stabilized composite fabric. In the disclosed process, a mechanically settable thermoplastic tricot backing fabric is bonded to a desired outer or shell fabric to form the composite. The composite is mechanically compressively shrunk in a two roll compactor, including a feeding roll and a retarding roll. The composite fabric is so oriented relative to the compacting apparatus that the tricot backing fabric contacts the retarding roll, and the relationship of peripheral speeds of the feeding and retarding rolls is such as to effect longitudinal upsetting of the knitted loops of the backing material, confined wholly within the lengths of the loops to avoid pleating of the fabric. The mechanical compressive shrinkage operation is so carried out that the settable backing fabric material is semi-permanently set in an upset condition, at least partly by reason of selfgenerated heat of formation, resulting from the mechanical compacting operation. The new product, in addition to having a desirable stabilization against excess shrinkage, has a noticeably improved hand, as compared to the same material prior to processing, rendering the processed composite fabric more attractive for many applications, particularly garments.,下面是Method of producing shrink-stabilized composite fabrics专利的具体信息内容。

  • 2. The method of claim 1, further characterized by a. imparting steam to the composite fabric immediately prior to the compressive shrinkage thereof, and b. drying said composite fabric immediately after compressive shrinkage thereof by confining one side of the composite fabric against a heated moving surface while applying pressure in the thickness direction of the composite fabric.
  • 3. The method of claim 2, further characterized by a. the exposed surface of the shell fabric being held against said heated surface during drying.
  • 4. The method of claim 1, further characterized by a. the shell fabric being contacted for advancement of said composite fabric by a first moving surface having a predetermined surface speed in an advancing direction, and b. the backing fabric being contacted for retardation of the composite fabric by a second moving surface having a surface speed in said advancing direction of from about 60 percent to about 80 percent of the speed of the first surface.
  • 5. The method of claiM 4, further characterized by a. the composite fabric being resiliently supported by said first moving surface during advancement of the composite fabric, and b. the composite fabric being pressed against said first moving surface at the entry end of said compressive shrinking zone by applying localized, across-the-width pressure to the exposed surface of the backing fabric in the thickness direction of the fabric.
  • 6. The method of forming a shrink-stabilized composite fabric, which comprises a. supplying a composite fabric including a shell fabric and a backing fabric after said fabrics have been adhesively bonded to each other in substantially full area contact, b. at least the backing fabric being of a mechanically settable thermoplastic material, c. mechanically compressively shrinking the composite fabric in a longitudinal direction with sufficient mechanical compacting effort to effect self-generation of heat of deformation in the backing fabric sufficient to set the fabric in a compressively shrunk condition. d. said mechanical compressive shrinking operation being effected by relatively advancing the one of said backing or shell fabric toward and into a short compressive shrinkage zone relatively retarding the other of said backing fabric or shell fabric at the end of said zone, and thereby causing the composite fabric to decelerate and compress in said zone.
  • 7. The method of claim 6, further characterized by a. the backing fabric comprising a knitted tricot fabric having longitudinal rows of loops on its exposed surface and diagonally disposed connecting elements on its concealed surface bonded to said shell fabric.
  • 8. The method of claim 7, further characterized by a. the relative advancement of the shell fabric and relative retardation of the backing fabric being effected by directing the composite fabric through a roller nip and therein applying rolling pressure to the composite fabric, and b. the relative retardation of the backing fabric at said roller nip being more effective than the relative advancement of said shell fabric at said roller nip.
  • 9. The method of claim 8, further characterized by a. the shell and backing fabrics being bonded by a heat reduceable foam or a heat or time curing bonding resin, and b. the tricot backing material being formed of multifilament acetate or nylon.
  • 10. The method of forming a shrink-stabilized composite fabric, which comprises a. forming a composite fabric by adhesively bonding a shell fabric and a backing fabric in substantially full area contact, b. the backing fabric comprising a tricot fabric knitted of multi-filament yarns, and c. mechanically compressively shrinking the composite fabric by means of a two roll compactor acting differentially on the opposite sides of said composite fabric to effect conversion of the multi-filament yarns to textured multi-filament yarns and to effect a semi-permanent reduction in the length of the composite fabric.
  • 11. The method of claim 10, further characterized by a. said tricot backing material having longitudinally disposed rows of knitted loops forming its exposed surface, b. said composite fabric being compacted lengthwise to an extent sufficient to upset said loops in the thickness direction of the fabric and to convert the loops to saw-tooth general cross-sectional configuration, but insufficient to cause the apices of said saw-tooth loop configurations to have acute included angles after completion of the compressive shrinking operation.
  • 12. The method of claim 11, further characterized by a. the multi-filament yarns of the tricot backing fabric being of a mechanically settable thermoplastic material, and b. the composite fabric being compressively shrunk to a degree to cause a self-generation of heat of deformation sufficient to effect setting of the filament material.
  • 13. The method of claim 10, further characterized by a. causing said fabric to have a high moisture content during the compressive shrinkage thereof, b. conveying the composite fabric about a heated dryer drum immediately following the compressive shrinking thereof, and c. applying broad area pressure to the composite fabric in the thickness direction while said fabric is being conveyed by said dryer drum.
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