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Yarn incorporating fluoropolymer staple fiber

A technology for synthesizing short fibers and polymers, applied in the direction of yarn, fabric, textile, etc.

Inactive Publication Date: 2020-04-24
WL GORE & ASSOC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Despite the teachings of the prior art, there remains a need for improved yarns incorporating fluoropolymer staple fibers in combination with other staple fibers to achieve performance advantages heretofore not available from the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Yarn incorporating fluoropolymer staple fiber
  • Yarn incorporating fluoropolymer staple fiber
  • Yarn incorporating fluoropolymer staple fiber

Examples

Experimental program
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Effect test

preparation example Construction

[0051] The yarns of the present disclosure can be used to produce articles, for example, textiles using any known method for producing textiles from yarns. Textiles can be produced by known knitting, weaving or non-woven methods to produce knitted textiles, woven textiles non-woven textiles or fleece textiles. Suitable examples of textile preparation methods may include, for example, warp knitting, weft knitting, circular knitting, flat knitting, seamless knitting, broad loom, narrow weaving, belting, Rapier weaving, shuttle weaving, air jet weaving, water jet weaving, projectile loom weaving and jacquard weaving. Suitable examples of nonwoven methods include, for example, needle punching, hydroentangling, wet-laid, and meltblowing. A textile may be produced using one or more yarns of the present disclosure, or a textile may comprise a yarn of the present disclosure and one or more other yarns. Another object of the present invention is to provide an expanded PTFE for use in...

Embodiment 1

[0098] Obtain expanded PTFE fibers with the following properties: Width: 18.4mm; Thickness: 0.089mm; Denier: 2224tex; Density: 1.34g / cm 3 ; Tensile strength: 61.2 kilograms (kg); Toughness: 27.5g / tex. The fibers are passed vertically over a fibrillation roll (or pull roll) with a gill bar parallel to the axis of rotation. The pin bar (commercially available from the Burkhardt Company (Switzerland)) had 15 pins per cm, each pin 1.2 mm long. The fibers passing over the fibrillation rolls were positioned so that at least 3 gib bars were in contact with the filaments, with a relative velocity between one gib bar and the filament speed being 2.8 times faster. The resulting denier per fiber (dpf) ranges from 15 denier to 30 denier. The average caliper diameter was 40-56 microns.

Embodiment 2

[0100] Obtain expanded PTFE fibers with the following properties: Width: 10.3mm; Thickness: 0.13mm; Denier: 2000tex; Density: 1.55g / cm 3 ; Tensile strength: 36.58kg; Toughness: 18.3g / tex.

[0101] The fibers are passed vertically over a series of two fibrillation rolls with gill bars parallel to the axis of rotation. The gilling bars were purchased from Burckhardt (Switzerland), the first roll had 15 needles per cm so that at least 3 gilling bars were in contact with the filament, the relative The speed is 1.3 times faster. The protruding length of the needle is 2 mm. The second fibrillation roll had 50 needles per centimeter so that at least 3 gill bars were in contact with the fibers and the relative speed between one gib bar and the filament speed was 2.3 times faster. The protruding length of the needle is 2 mm. The difference in speed ratio between the nip assembly roller feeding the filaments to the first fibrillation roller and the nip assembly roller was 5% faster ...

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Abstract

Yarns made from staple fibers comprising a plurality of fluoropolymer staple fibers with an average caliper diameter of at least 15 micron and a plurality of non-fluoropolymer staple fibers, wherein the ratio of the average caliper diameter of the fluoropolymer staple fibers to the non-fluoropolymer staple fibers in the yarn is 1.2 or greater. Also taught are yarns made from staple fibers with a plurality of fluoropolymer staple fibers having a rectangular cross-section and with an average caliper diameter up to 500 micron, and a plurality of non-fluoropolymer staple fibers with an average caliper diameter up to 40 micron.

Description

technical field [0001] The present disclosure generally relates to the field of yarns incorporating fluoropolymer staple fibers and articles made therefrom. Background technique [0002] Fluoropolymers have been used in various forms as friction modifiers in yarns and cords. For example, US Patent No. 6,132,866 to Nelson et al. relates to a staple yarn comprising a mixture of 35 to 90% by weight fluoropolymer fibers and 65 to 10% by weight of one or more types of hybrid fibers. [0003] Japanese Patent Application Hei 1 [1989]-139833 discloses fibrous materials with good flexibility prepared by mixing less than 30% polytetrafluoroethylene fibers or strands with natural and / or synthetic fibres. Fabrics and cloths made from the disclosed fiber materials have good drape and improved pilling resistance. [0004] Despite the teachings of the prior art, there remains a need for improved yarns incorporating fluoropolymer staple fibers in combination with other staple fibers to ac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D02G3/04D03D15/56
CPCD02G3/04D10B2321/042D02J3/00
Inventor J·W·多兰D·J·迈纳
Owner WL GORE & ASSOC INC