Hygroscopic granular cotton and filling cotton containing the granular cotton

A hygroscopic, granular cotton technology, used in protective clothing, fiber treatment, textiles and papermaking, etc., can solve the problems of hygroscopic fiber bulkiness and low resilience, and achieve excellent hygroscopic performance, not easy to be stuffy, and keep fluffy. sexual effect

Active Publication Date: 2022-01-14
JAPAN EXLAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bulkiness and resilience of moisture absorbing and desorbing fibers are relatively low, so how to apply them to filling cotton has become an important issue

Method used

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  • Hygroscopic granular cotton and filling cotton containing the granular cotton
  • Hygroscopic granular cotton and filling cotton containing the granular cotton

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0047] In order to make this invention understandable, although an Example is shown below, these are mere illustrations, and the gist of this invention is not limited to them. It should be noted that, unless otherwise specified, the parts and percentages in the examples are expressed on a mass basis. In addition, the evaluation method of the characteristic in an Example is as follows.

[0048]

[0049] Measured in accordance with "8.4 fiber length", "8.5 denier", "8.11 initial stretch resistance", and "8.12 crimp" of JIS L 1015:2010.

[0050]

[0051] 1. Proportion of the cross-sectional area of ​​the surface layer in the fiber cross-section

[0052] The sample fiber is immersed in a dyeing bath containing 2.5% cationic dye (Nichilon Black G 200) and 2% acetic acid relative to the mass of the fiber at a bath ratio of 1:80, boiled for 30 minutes, and then washed with water , dehydration, drying. The obtained dyed fiber was sliced ​​perpendicular to the fiber axis, and th...

manufacture example 1

[0076] An acrylonitrile-based polymer (intrinsic viscosity [η]=1.5 in dimethylformamide at 30° C.) of 90% by mass of acrylonitrile and 10% by mass of methyl acrylate was dissolved in a 48% by mass aqueous solution of sodium thiocyanate, Thus a spinning dope is prepared. This spinning dope was spun, washed with water, stretched, crimped, and heat-treated according to the usual methods to obtain an acrylic fiber with a single fiber fineness of 1.7 dtex.

[0077] The obtained acrylic fiber was simultaneously subjected to crosslinking introduction treatment and hydrolysis treatment at 100°C for 2 hours in an aqueous solution containing 0.5% by mass of hydrazine hydrate and 2.0% by mass of sodium hydroxide, and treated with an aqueous solution of 8% by mass of nitric acid at 100°C for 3 hours. hours and wash with water. Hygroscopic fiber A was obtained by immersing the obtained fiber in water, adding sodium hydroxide, adjusting pH to 9, washing with water, and drying. Table 1 sho...

manufacture example 2

[0079] In manufacture example 1, the hygroscopic fiber B was obtained similarly except having made the density|concentration of sodium hydroxide into 1.5 mass %. Table 1 shows details and evaluation results of the obtained hygroscopic fiber.

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Abstract

[Problems] The bulkiness and resiliency of moisture absorbing and desorbing fibers are low, and it becomes a problem in terms of development to filling cotton. Some techniques for improving bulkiness are known, but they only stop at securing the initial bulkiness, and the bulkiness tends to gradually decrease due to moisture absorption, repeated use, and passage of time. The present invention is made in view of the present state of the prior art, and an object of the present invention is to provide hygroscopic granular cotton having both hygroscopicity and continuous bulkiness, and filling cotton containing the granular cotton. [Solution] A hygroscopic granular cotton characterized in that it contains hygroscopic fibers composed of a surface layer made of a polymer having a cross-linked structure and a carboxyl group, and a center part made of propylene Formed from a nitrile polymer, the hygroscopic granular cotton has a volume expansion rate of 15% or more and a moisture absorption rate of 4% or more in an environment of 20°C and a relative humidity of 65%. The expansion of the volume under, the volume after the load is removed.

Description

technical field [0001] The present invention relates to hygroscopic granular cotton having both hygroscopicity and continuous bulkiness, and filling cotton containing the granular cotton. Background technique [0002] Conventionally, it has been proposed to utilize moisture absorbing and desorbing fibers in cotton filling for clothing and bedding (Patent Document 1). Filling cotton using moisture absorbing and releasing fibers is expected to have functions such as adjusting humidity through moisture absorbing and releasing properties, and keeping heat by utilizing heat generated by moisture absorption. However, the bulkiness and resilience of moisture absorbing and desorbing fibers are relatively low, so how to apply them to filling cotton has become an important issue. [0003] Regarding this problem, Patent Document 2 discloses a technique for improving bulkiness by modifying moisture absorbing and releasing fibers. In addition, Patent Document 3 discloses a technique fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/02D04H1/43D06M11/38D06M11/63D06M101/28
CPCD04H1/02D04H1/073D04H1/43D06M11/38D06M11/63A41D31/02A41D31/04A41D31/12A47G9/00
Inventor 西崎直哉藤本克也
Owner JAPAN EXLAN CO LTD
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