Woven or Knitted Fabric and Clothes Containing Crimped Composite Filaments and Having an Air Permeability Which Increases When the Fabric is Wetted With Water

a composite filament and air permeability technology, which is applied in the direction of knitting, weaving, warp knitting, etc., can solve the problems of insufficient change in air permeability, slow drying speed, wearer discomfort, etc., and achieve the effect of increasing air permeability, decreasing air permeability, and increasing air permeability of clothes

Inactive Publication Date: 2008-06-05
TEIJIN FRONTIER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0035]The crimped composite filaments contained in the woven or knitted fabric of the present invention have a characteristic property that the percentage of crimp of the filaments decreases 10% or more upon wetting with water in comparison with one upon drying. The woven or knitted fabric containing the crimped composite filaments therefore exhibits a significantly increased air permeability upon wetting with water in comparison with one upon drying. Accordingly, in the case where the woven or knitted fabric containing a crimped composite filaments of the present invention is used as a material for forming whole or a part of outerwear, sportswear or underwear, when the clothes a wearer wears are wetted with water, for example, due to wearer's sweating, the air permeability of the clothes increases, and the water component retained within the clothes is dried and released. When the clothes are thus adequately dried, the air permeability decreases, and the warmth retention is improved. The wearability is therefore always kept excellent, and the clothes contribute to the maintenance of wearer's good health.

Problems solved by technology

However, when the above-mentioned conventional woven or knitted fabric is wetted with water or, for example, by sweat, problems that the fabric sticks to the skin to make the wearer feel uncomfortable, and the drying speed is slow, occur.
Although the air permeability of the woven or knitted fabric is reversibly increased upon wetting with water in comparison with that upon drying, an amount of change in air permeability is practically insufficient.
However, the extent of the change in air permeability is practically insufficient and, thus, an air permeable self-adjusting woven or knitted fabric having a still larger change in air permeability has been desired.

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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  • Woven or Knitted Fabric and Clothes Containing Crimped Composite Filaments and Having an Air Permeability Which Increases When the Fabric is Wetted With Water
  • Woven or Knitted Fabric and Clothes Containing Crimped Composite Filaments and Having an Air Permeability Which Increases When the Fabric is Wetted With Water
  • Woven or Knitted Fabric and Clothes Containing Crimped Composite Filaments and Having an Air Permeability Which Increases When the Fabric is Wetted With Water

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0141]A nylon 6 having an intrinsic viscosity [η] of 1.3 was melted at 270° C., and a modified poly(ethylene terephthalate) in which 2.6 mol % of 5-sodium sulfoisophthalic acid was copolymerized and that had an intrinsic viscosity [η] of 0.39 was melted at 290° C. Both molten polymers were extruded through a spinneret for side-by-side type composite filaments in an extrusion rate of 12.7 g / min for each polymer. The spinneret was one described in Japanese Unexamined Patent Publication (Kokai) No. 2000-144518. The spinning nozzle was formed from two arc-shaped slits A and B arranged substantially on one the same circumference at a spacing d. The area SA of the arc-shaped slit A, the slit width A1, the area SB of the arc-shaped slit B, the slit width B1 and the area SC surrounded by the inner peripheral faces of the arc-shaped slits A and B simultaneously satisfy the following requirements (1) to (4):

[0142](1) B11

[0143](2) 1.1≦SA / SB≦1.8

[0144](3) 0.4≦(SA+SB) / SC≦10.0

[0145](4) d / A1≦3.0

The...

example 2

[0150]The same composite filaments yarn as used in Example 1 and a conventional poly(ethylene terephthalate) multifilaments yarn (84 dtex / 30 f) were used. Using 28-gauge double tubular knitting machine in the same manner as in Example 1, the composite filaments yarns and the poly(ethylene terephthalate) multifilaments yarns were alternately fed to the machine with every one yarn to form a tubular knitted fabric having an interlock stitch with a knitting density of 54 courses / 2.54 cm and 34 wales / 2.54 cm. The tubular knitted fabric was subjected to dyeing, water absorbent treatment and dry heat final set in the same manner as in Example 1.

[0151]The knitted fabric thus obtained had a basis weight of 206 g / m2, and exhibited a stretch percentage of 50% in the warp direction, a stretch percentage of 100% in the weft direction, an air permeability upon drying of 150 ml / cm2 / sec, an air permeability upon being wetted with water of 280 ml / cm2 / sec and a change in air permeability of 87%. The ...

example 3

[0155]The same side-by-side type composite filaments yarns as in Example 1 were produced. The composite filaments yarns were supplied to a conventional 28-gauge tricot knitting machine. The composite filaments yarns were fed to a back guide bar of the knitting machine at a full set. On the other hand, a conventional false twisted, crimped poly(ethylene terephthalate) multifilament yarns (33 dtex / 36 fil.) having a percentage of crimp of 20% were simultaneously fed to a front guide bar of the tubular knitting machine at a full set to give a knitted fabric having a half tricot stitch (back: 10-12, front: 23-10) with an on-machine density of 80 courses / 2.54 cm.

[0156]The knitted fabric was dyed at 130° C. for a peak temperature-keeping time of 15 minutes so that the latent crimpability of the composite filaments was manifested. The knitted fabric was then subjected to padding treatment with a fluororesin water repellent treatment liquid. The treated knitted fabric was then dried at a tem...

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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Abstract

A woven or knit fabric containing crimped composite fibers having its air permeability enhanced by water wetting and being useful in clothes such as outerwear, which woven or knit fabric contains 10 to 100 mass % of composite fibers of side-by-side type or eccentric core sheath type composed of polyester resin component and polyamide resin component whose thermal shrinkages are different from each other, the composite fibers having crimps developed by heat treatment. The composite fibers exhibit humid crimp factor HCF (%), as measured through a procedure comprising immersing the same in water of 30° C. for 2 hr, pulling them up, interposing them between a pair of filter papers at 30° C. in a humidity of 90% RH within 60 sec of the pulling up and applying a pressure of 0.69 mN/cm2 for 5 sec, of ≧10% lower than the dry crimp factor DCF (%) after dying by allowing them to stand still at 20° C. in a humidity of 65% RH for 24 hr, so that the woven or knit fabric exerts of the effect of air permeability enhancement by water wetting.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a woven or knitted fabric and clothes containing crimped composite filaments and having an air permeability which increases when the fabric is wetted with water or, for example, sweat. Particularly, the present invention relates to a woven or knitted fabric comprising composite filaments comprising a polyester component and a polyamide component bonded together in a side-by-side or eccentric core-sheath type structure, and having manifested crimps. Moreover, the present invention relates to a woven or knitted fabric and clothes having an air permeability which reversibly and efficiently increases when the fabric is wetted with water, in comparison with that upon drying.[0002]It has been known that a woven or knitted fabric containing crimped synthetic filaments can be used for sportswear such as skiwear, windbreakers and outdoor wear, and outerwear such as raincoats and men and women's coats, etc.[0003]However, when the ab...

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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Patent Type & Authority Applications(United States)
IPC IPC(8): D03D15/00D03D15/567
CPCA41B17/00A41B2400/20A41D31/00A41D2400/20D03D15/00D03D15/0027D04B21/16D03D15/04D04B1/16D10B2331/02D10B2331/04D10B2501/00D10B2501/04D03D15/0083D10B2401/02A41D31/14Y10T442/3154D03D15/567D03D15/573D03D15/30D03D15/283D03D15/292D04B1/20D04B21/00A41B1/00
Inventor YASUI, SATOSHIYAMAGUCHI, TAKESHIYOSHIMOTO, MASATOMORIOKA, SHIGERU
Owner TEIJIN FRONTIER CO LTD
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