Knitted fabric having excellent heat-retaining properties and production method therefor

A manufacturing method and technology of knitted fabrics, which are applied in knitting, weft knitting, textiles and papermaking, etc., can solve problems such as movement barriers, insufficient thermal insulation, increased knitted fabric mesh, cloth thickness, etc., and achieve excellent thermal insulation, Excellent hand feel and good dimensional stability

Active Publication Date: 2018-06-08
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, the development of knitted fabrics for thermal insulation shirts has focused on imparting functions such as moisture absorption and heat generation performance, but the simple combination of functional fibers tends to impair the texture of knitted fabrics
In addition, in order to improve heat retention, thicker knitted fabrics are effective, but thick undershirts are bulky and hinder movement and may impair workability. Therefore, it is required to develop lightweight, comfortable and warm undershirts. knitted fabric
[0003] Patent Document 1 proposes a method of fabricating knitted fabrics by interweaving short-fiber yarns and long-fiber yarns. However, the short-fiber yarns used do not contain shrinkable fibers and are interlaced knitting of non-shrinkable short-fiber yarns and long-fiber yarns. Although it has a light weight feeling, the heat retention is not sufficient
[0004] Patent Document 2 describes a method for producing short-staple yarns using high-shrinkage fibers. However, this method is a processing method in which high-shrinkage fibers are mixed in the spinning process. After the shrinkage of the yarn, it is used in the weft knitting process to make light-weight short-staple yarn suitable for knitted fabrics. Therefore, as a knitted fabric, although good heat retention can be obtained, it must not be ensured if it is to ensure heat retention. Knitted fabrics cannot be made lightweight without increasing the mesh size and cloth thickness of knitted fabrics

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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  • Knitted fabric having excellent heat-retaining properties and production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] An acrylonitrile copolymer comprising 91% by mass of acrylonitrile and 9% by mass of vinyl acetate obtained by an aqueous suspension polymerization method was dissolved in dimethylacetamide to obtain a spinning dope having a polymer concentration of 20% by mass. This spinning dope was discharged into a coagulation bath having a composition of 60% by mass of dimethylacetamide, 40% by mass of water, and a temperature of 40° C. using a spinneret having circular discharge holes for spinning. In addition, for the spinneret, a nozzle die having a discharge hole of 0.008 mm in diameter and 15,000 holes was used. Next, after washing the solvent in boiling water, stretch it to 5 times, then attach the oil agent, dry it with a hot roll at 150°C, perform a heat relaxation treatment, and perform a steam stretching process of 1.8 times in order to obtain the target shrinkage rate, and then cut it. The fiber-forming length was 38 mm, and the acrylic fiber whose cross-sectional shape ...

Embodiment 2

[0110] Using a circular knitting machine with 12 needles (G) and 24 mouths, the twist coefficient made in Example 1 is 105 and the staple fiber yarn a of 85 counted as the yarn count and the nylon false twist processed yarn (30dtex / 16f ) yarn B interweaves the knitted fabric of the double rib structure at an interlacing ratio of 1:1, and obtains the aforementioned 85-count staple fiber yarn a with a blending ratio of 78% by mass and a mesh weight of 99 g / m 2 woven fabric. This woven fabric was dyed in the same manner as in Example 1. The net weight of the knitted fabric obtained is 165g / m 2 , With regard to the spun yarn A constituting the knitted fabric, the above-mentioned 85-count spun-staple yarn a shrunk to become a thick dyed yarn of 50 metric counts. In addition, the heat retention rate of the obtained knitted fabric was 37%, which was excellent in heat retention.

Embodiment 3

[0112] 40% by mass of the highly shrinkable acrylic fiber (V85) produced in Example 1, 20% by mass of the same acrylic fiber (H616) as used in Example 1, and rayon with a single fiber fineness of 1.3 dtex After the yarn (Ry) was blended at 40% by mass, a staple yarn a with a twist coefficient of 105 and a metric count of 68 was produced through a cotton spinning process. Using a circular knitting machine with 12 needles (G) and 24 mouths, the spun yarn a of 68 counted in metric count and the yarn B of FTY (30dtex / 20f) are interleaved with plain stitches at an interweaving ratio of 1:1 In the knitted fabric of the structure, the blending rate of the above-mentioned 68 staple yarn a was 87% by mass and the mesh weight was 92g / m. 2 woven fabric. This woven fabric was dyed in the same manner as in Example 1. The net weight of the knitted fabric of gained is 153g / m 2 , With regard to the spun yarn A constituting the knitted fabric, the above-mentioned 68-count spun-staple yarn a...

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 knitted fabric having an interknitting rate of 2:1-1:3 between a spun yarn A and a thread B, said spun yarn A containing an acrylic fiber and having 15%-30% elongation and said thread B having a metric count of 40-350. The knitted fabric is obtained by: knitting a knitting fabric including 35%-95% by mass fine spun yarn a including a high-shrinkage fiber having a boiling-water shrinkage of 30%-45%; heating the knitting fabric at a moist heat of at least 70 DEG C; shrinking the high-shrinkage fiber in the spun yarn a constituting the fabric; and making same a thick spun yarn having said metric count. The knitted fabric obtained in this manner has a small basis weight, is lightweight, and has excellent heat-retaining properties and a knitted fabric having said light-weight, heat-retainingproperties can be commercially obtained.

Description

technical field [0001] The present invention relates to a small and lightweight knitted fabric having excellent heat retention and a method for producing the same. Background technique [0002] In recent years, the development of knitted fabrics for heat-retaining undershirts has focused on imparting functionality such as moisture absorption and heat generation performance, but simply combining functional fibers tends to impair the texture of knitted fabrics. In addition, in order to improve heat retention, thicker knitted fabrics are effective, but thick undershirts are bulky and hinder movement and may impair workability. Therefore, it is required to develop lightweight, comfortable and warm undershirts. of knitted fabrics. [0003] Patent Document 1 proposes a method of fabricating knitted fabrics by interweaving short-fiber yarns and long-fiber yarns. However, the short-fiber yarns used do not contain shrinkable fibers and are interlaced knitting of non-shrinkable short...

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(China)
IPC IPC(8): D04B1/16D02G3/04D04B1/00D04B1/18
CPCD02G3/04D04B1/00D04B1/16D04B1/18
Inventor 中桥慎吾团秀人
Owner MITSUBISHI CHEM CORP
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