Method for heat-setting of crimps of artificial filament tows专利检索-饱和蒸汽物理专利检索查询-专利查询网

Method for heat-setting of crimps of artificial filament tows

阅读：413发布：2023-08-24

专利汇可以提供Method for heat-setting of crimps of artificial filament tows专利检索，专利查询，专利分析的服务。并且The present invention provides a method of producing excellent crimped fibers, in which artificial fibers are subjected to mechanical crimping, enveloped in a crimped state in a wrapping under tension, and are passed through a high temperature pressurized saturated steam chamber at the annealing temperature of the fibers. The crimps are permanently fixed by the effect of moisture and heat under a lateral pressure. The resulting fibers, when made into an end product, have a high degree of crimp recovery upon reheating in the finishing process, even if the crimps have been straightened by processing in air before finishing operation.，下面是Method for heat-setting of crimps of artificial filament tows专利的具体信息内容。

权利要求

1. A method for heat-setting of crimps on artificial fibers gathered in a tow form which have been previously crimped by mechanical means comprising: 1. enveloping said crimped fibers gathered in a tow form in a wrapping, while the fibers being fed lengthwise in excess to the wrapping so that the fibers enveloped in the wrapping can have crimps at least to an extent corresponding to the sum of the predetermined crimping ratio of the fibers plus the degree of contraction of fibers at the heat-treating temperature thereof, 2. increasing the density of the crimped fibers in the wrapping by mechanical compression, 3. introducing the compressed crimped fibers into and subjecting to travelling through a pressurized zone substantially containing only saturated steam at a predetermined temperature selected within the range of the heat resistance temperature of the fiber, while guided by the enveloping wrapping which is travelling under a tension, 4. heat-treating the wrapped fibers in said zone while subjecting the fibers to a sufficiently strong lateral pressure from the wrapping, lying on the outer side of the fibers, and travelling under a tension, along larger radii of curveture than that lying inner side of the fiber and travelling in contact with more than one curved surfaces 5. withdrawing the wrapping which envelopes the fibers therein from said zone and 6. separating the wrapping from the fibers.

2. increasing the density of the crimped fibers in the wrapping by mechanical compression,

2. A method of claim 1, in which the fibers gathered in a tow form is a tow consisting of a plurality of individual artificial filaments.

3. A method of claim 1, in which the fibers gathered in a tow form are scores of filament yarns arranged in a tow form.

3. introducing the compressed crimped fibers into and subjecting to travelling through a pressurized zone substantially containing only saturated steam at a predetermined temperature selected within the range of the heat resistance temperature of the fiber, while guided by the enveloping wrapping which is travelling under a tension,

4. heat-treating the wrapped fibers in said zone while subjecting the fibers to a sufficiently strong lateral pressure from the wrapping, lying on the outer side of the fibers, and travelling under a tension, along larger radii of curveture than that lying inner side of the fiber and travelling in contact with more than one curved surfaces

4. A method of claim 1, in which increase of the density of crimped fibers in the wrapping is effected by passing the fibers enveloped in the wrapping through a tapered conduit.

5. A method of claim 4, in which the supply of the crimped fibers in the wrapping is increased by applying a forward thrust to the crimped fibers at the inlet side of the tapered conduit, thereby forcing the fibers into the wrapping as it is received by the conduit.

5. withdrawing the wrapping which envelopes the fibers therein from said zone and

6. separating the wrapping from the fibers.

说明书全文

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Method for heat-setting of crimps of artificial filament tows

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