Fabric, multilayer structured fabric, and fiber product

Patent metadata

Field	Value
Publication number	US-11160320-B2
Application number	US-201716085687-A
Country	US
Kind code	B2
Filing date	Mar 29, 2017
Priority date	Apr 5, 2016
Publication date	Nov 2, 2021
Grant date	Nov 2, 2021

Abstract

The invention addresses the problem of providing a cloth, a multilayered cloth, and a textile product, which have flame retardancy and heat insulation and develop a relief structure when exposed to flame or heat. As a means for resolution, a cloth characterized in that a yarn A having a high thermal shrinkage rate and a yarn B having a low thermal shrinkage rate are alternately arranged in the warp direction or weft direction is obtained, then, as necessary, a multilayered cloth is obtained using the cloth as an intermediate layer, and further, as necessary, a textile product is formed using the multilayered cloth.

First claim

The invention claimed is:

1. A textile product comprising a multilayered cloth and being selected from the group consisting of protective garments, firefighting fireproof garments, firefighting activity garments, rescue garments, workwear, police uniforms, and garments for Self-Defense Forces,
wherein the multilayered cloth has a heat insulation (ISO17492) of 3 seconds or more as TPP TIME,
and the multilayered cloth comprises a cloth as an intermediate layer, the intermediate layer having laminated thereon an outermost layer and an innermost layer,
and the cloth is characterized in that a yarn A having a high thermal shrinkage rate and a yarn B having a low thermal shrinkage rate are alternately arranged at intervals of 10 to 50 mm in only one of the warp direction and weft direction of the cloth,
and the thickness difference D (following formula) after a dry-heat treatment at 300° C. for 5 minutes is 2.0 mm or more wherein a sample cut to a size of 15 cm×15 cm is placed in an electric furnace at a temperature of 300° C. for 5 minutes, and then the degree of expansion of the developed relief structure (cloth thickness difference D) is measured and in the measurement of thickness, a pressure of 7 g/cm 2 is applied using a circular load having a diameter of 35 mm,
Thickness difference D=(cloth thickness after the treatment d 2)−(cloth thickness before the treatment d 1),

and when subjected to a dry-heat treatment at a temperature of 300° C. for 5 minutes, the cloth develops a relief structure that is stripe-shaped and continuous in the warp direction or weft direction,
and the cloth has an afterflame time of 2.0 seconds or less in the combustion measurement in accordance with JIS L1091-1992, A-4 Method (12-second heating method),
and the yarn A having a high thermal shrinkage rate and/or the yarn B having a low thermal shrinkage rate is a spun yarn or a filament,
and the difference HAB in dry thermal shrinkage rate between the yarn A having a high thermal shrinkage rate and the yarn B having a low thermal shrinkage rate is 10% or more:
Dry thermal shrinkage rate (%)=((length before testing(mm)−length after testing (mm))/(length before testing(mm))×100,

Difference HAB in thermal shrinkage rate (%)=(dry thermal shrinkage rate of the yarn A (%))−(dry thermal shrinkage rate of the yarn B (%)),

and the yarn A having a high thermal shrinkage rate includes 50 wt % or more of a meta-aramid fiber, and the yarn B having a low thermal shrinkage rate includes 50 wt % or more of a para-aramid fiber,
and the cloth includes a breathable waterproof film laminated on one side thereof,
and the breathable waterproof film is formed of a fluorine-based film, a polyurethane film, a polyethylene film, or a polyester film,
and the residual solvent content of the meta-aramid fiber is 0.1 wt % or less,
and the yarn A having a high thermal shrinkage rate includes 50 to 95 wt % of a meta-aramid fiber and 5 to 50 wt % of a para-aramid fiber.

Assignees

• Teijin Ltd

Inventors

• NAKANO Kiho
• Iwashita Kenji

Classifications

• D03D1/0035

  Protective fabrics · CPC title

• B32B5/142

  Variation across the area of the layer · CPC title

• D03D15/513

  heat-resistant or fireproof · CPC title

• B32B27/40

  comprising polyurethanes · CPC title

• B32B27/304

  comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF · CPC title