JPH0340845A - Wind-protecting knit fabric and production thereof - Google Patents

Abstract

PURPOSE:To obtain the subject soft and dense knit fabric by forming front and back textures with multifilament yarns having the same single fiber denier and knitting an intermediate texture with a multifilament yarn finer than those of the front and back textures in a state to form a specific half loop length. CONSTITUTION:The objective knit fabric is a multi-layer knit fabric composed of a front texture, a back texture and an intermediate texture. For example, the front and back textures are produced by using a multifilament yarn having a single fiber denier of >=2de in the form of plain-knit fabric and the intermediate texture is produced by knitting a multifilament yarn having a single fiber denier of <=1de (preferably a mixture of said multifilament yarn and a yarn having a hot water shrinkage of >=15%) to form a steric structure having a half loop length of <=3.5mm.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a windproof knitted fabric having a multilayer structure.

(Prior Art) A method conventionally used to obtain a fabric with windproof performance, that is, a fabric with low air permeability, involves applying a resin or the like to the surface layer by subsequent processing (Japanese Patent Application Laid-open No. 60-17! 13
There is a method of forming a fabric with a dense (high density) structure. In order to form such a dense structure, it is possible to knit and weave at a high density, but there are limits to this on knitting and loom machines, and furthermore, fabrics that are simply knitted at a high density may break during the sewing process. There is a risk of causing a so-called run in which the stitches come undone.

Therefore, as methods for obtaining a dense structure without relying on high-density weaving methods, we have developed a method of knitting and weaving using a high multifilament yarn composed of a large number of fine filaments, a method of knitting and weaving using a split-type composite yarn, A method of shrinking the fabric and dividing the composite yarn into high multifilament yarns (Japanese Patent Laid-Open No. 5
7-117647, etc.), and one in which fabrics are laminated to form a multilayer structure (Japanese Utility Model Publication No. 1110781/1981).

(Problem to be solved by the invention) However, few of the conventional fabrics with a dense structure have sufficient windproof properties, and most of them are highly breathable. Its uses are limited due to its flat texture. In addition, those coated with resin etc. can provide windproof performance, but the texture becomes hard and the original texture of the fabric is lost.

The present invention is intended to solve this problem, and aims to provide a knitted fabric that has sufficient windproof performance without changing the soft texture of the fabric.

(Means for Solving the Problems) The present invention provides a multilayer knitted fabric consisting of a front weave, a back weave, and a middle layer structure, in which the front and back weaves are made of multifilament yarns with a single yarn fineness of 2 deniers or more, and the middle layer texture is is a windproof knitted fabric characterized by a sufficiently dense structure made by knitting multifilament yarns with a single yarn fineness of 1 denier or less with a half-loop length of 16 mm or less, and such a knitted fabric is made of a single yarn after fibrillation. Split type composite a with fineness of 1 denier or less
After knitting a multilayer structure knitted fabric consisting of a front knitting structure, a back knitting structure, and a middle layer knitting structure using multifilament yarn with a single yarn fineness of 2 denier or more in the front and back parts, the split type It can be obtained by splitting and shrinking composite 1a fibers.

The multilayer structure knitted fabric referred to in the present invention has at least three tissues of small ft, namely a front tissue, a back tissue, and an intermediate tissue, and the front tissue, the back tissue, and these are connected by a tuck structure. Typical examples include tuck-reversible knitting, inlay-inserted knitting, etc.

The surface texture of the front and back surfaces is not particularly limited, but 1-knit, 1-wool knit, jersey knit, etc. are preferred from the viewpoint of beauty of the eyes, soft texture, etc. Further, the mesh density of the surface layer structure is preferably about 20 to 28 gauge. What is important in these surface textures is to knit them using multifilaments with a single filament fineness of 2 deniers or more. If the single yarn fineness is less than 2 denier, pilling will occur from the snag when worn as clothing or the like.

Next, we will discuss the middle organization. The intermediate structure is required to be composed of a fine multifilament yarn having a single yarn m degree of 1.0 denier or less. If the single yarn fineness exceeds 1.0 denier, the air permeability will be 100 cc/c no matter how you knit it.
m! /sec, and windproof performance cannot be obtained. In addition, the total fineness of the fineness multifilament yarn is 60 to 2.
00 denier is preferable.

Furthermore, although the fine multifilament yarn may form an intermediate structure by itself, it is possible to form a dense intermediate structure by mixing it with other yarns having different hot water shrinkage rates and heat-treating them after knitting. can get. In this case, the yarn to be mixed has a hot water shrinkage rate difference of 16% or more from the fineness multifilament yarn, and is particularly preferably one having a hot water shrinkage rate higher than that of the fineness multifilament yarn.

In addition, in order to obtain a more dense structure, it is preferable that the yarn forming the surface layer structure and the intermediate structure, especially the intermediate structure, has a three-dimensional structure such as a crimp or a loop, and the crimp ratio is 2.
It is preferable to mix about 5 to 60% false twisted yarn.

The intermediate structure as described above has a sufficiently dense structure, and has a 1/2 loop length (approximately (proportional to the tissue thickness), i.e., the half-loop length is 8.8 mm or less,
It is constructed by integrating three layers: a surface layer, a back layer, and an intermediate layer. Look at the cross section of such a knitted fabric at a magnification of about 50 times. a
When observed with a mirror (see Figure 4), it can be seen that fine filaments are intertwined with gaps of about 100 microns or less, and have a sufficiently dense structure.

The knitted fabric as described above can be obtained, for example, as follows. First, a multifilament yarn with a single filament fineness of 2 denier or more is used for the front weave and back weave, and a splittable composite fiber with a single filament fineness of 1.0 denier or less after fibrillation is used for the intermediate weave to create a multilayer structure knitted fabric. Organize. At this time, as mentioned above,
It is preferable to mix threads or crimped yarns with different heat shrinkage rates in the intermediate part structure, and the mixing amount is preferably about 10 to 85 M in the middle part structure. Various known split type composite A fibers can be used as long as they are fibrillated to 0.6 denier or less, but on the other hand, those that are fibrillated by dissolving and removing components can produce a sufficiently dense structure. Therefore, it is not preferable for the present invention. As such a split type composite pongee, one made of polyamide and polyester is most preferable, and examples include those made of a polyamide component having a radial shape and a polyester component having a shape that complements the radial part.

(FIG. 1) Next, the knitted fabric is subjected to fibrillation treatment. Known fibrillation treatments can be used; for example, when composite fibers made of polyamide and polyester are used, the polyamide component may be swollen and contracted with benzyl alcohol, phenol, phenyl alcohol, etc. Such treatment is preferable for the present invention because it causes shrinkage of the polyamide component, resulting in a more dense structure.

In addition, when the knitted fabric is mixed with yarns or bulky textured yarns having different hot water shrinkage rates as described above, the shrinkage is caused by relaxing, dyeing, hot water treatment using a 2-tsushima-1 processing machine, etc.

It goes without saying that the knitted fabric may be subjected to various post-processing processes such as dyeing, water repelling, bending, softening, antistatic water absorption, printing, and raising. However, processing methods that involve applying a large amount of resin or the like to the surface are not preferred.

(Example) In this example, air permeability was measured using JI8L-10186°2◆.

Example 1 126d/80f polyester false twisted yarn (crimp rate 2
Figure 1 (b) was used for the surface tissue (1) and the back tissue
) 50d/26f made of nylon 6 (A) and polyethylene terephthalate (to) with the cross-sectional shape shown in
A double yarn of splittable composite fiber of 125 d/
A three-layer structure knitted fabric shown in FIG. 2 was knitted using a 26-gauge double knitting machine using a 60 f polyester false twisted yarn (crimp rate 23%) as the insert yarn (4).

Next, the knitted fabric was impregnated with an emulsified aqueous solution of 3Q''C containing 1811m of benzyl alcohol and 2 parts of an ion activator, squeezed, and subjected to sensible heat treatment at 80°C for 6 minutes to cause the polyamide component of the composite ring to swell and contract. Divided into segment and polyester segment.

The average value of each segment after division was 0.12 denier. Table 1 shows the air permeability and texture of this knitted fabric, and FIG. 4 shows an electron micrograph of the cross section (30x magnification).

Example 2 126d/60f polyester false-twisted yarn (crimp rate 23%) was used for the front weave (1) and back weave (2), and the middle weave was made of polyester! Od/24f (Hot water shrinkage 2S%
) and polyester Sad/72f bulky crimped yarn (hot water shrinkage 6 degrees) air blended yarn (125d) as binding yarn (3)
/60f polyester processed yarn (Ilh shrinkage ratio 25φ) was used as the insertion yarn (4) for the second knitting machine with a 26 gauge double knitting machine.
The three-layer knitted fabric shown in the figure was knitted. Next relax 90
C. x 2 minutes and staining at 135.degree. C. for XIO minutes.

Table 1 shows the breathability and texture of this knitted fabric.

Example 3 126d/80f polyester false twisted yarn (crimp rate 2
BTo> was used for the front weave (1) and back weave position), and the middle weave was Sod/72f, a double yarn of polyester bulky crimped yarn (crimp rate 5 os) was used as the binding yarn (5), 125d/60f.
The polyester false-twisted yarn (crimp rate 23%) is inserted into yarn (
4) A three-layer knitted fabric shown in FIG. 2 was knitted using a 26-gauge double knitting machine. Next, relax! I O'O
The treatment was carried out for 2 minutes at 136°C and 2 minutes at 136°C for staining.

Table 1 shows the air permeability and texture of this knitted fabric.

Comparative Example 1 The knitted fabric of Example 1 was knitted using 160d/48f polyester false twisted yarn instead of the split type composite 41fl fiber, relaxed at 80°C for 2 minutes, and dyed 1
The treatment was carried out at 6°C for XIO minutes. The results are shown in Table 1.

Comparative Example 2 A split-type composite aS with a single yarn fineness of 0.5 denier or less after fibrillation was used to create an interlock structure (Figure 3), and the knitted fabric was treated with 18% penzyl alcohol and anionic activity. After impregnation and squeezing in an emulsified aqueous solution sOoC of agent 2s, the polyamide component of the composite ms was subjected to moist heat treatment for 5 minutes at eO''C to swell and shrink, and was divided into polyamide segments and polyester segments.Each segment after division was an average value. 0.12 denier.2T of such knitted fabric
I Temper - Hand is shown in Table 1.

Table 1 (Effects of the Invention) The windproof knitted fabric according to the present invention has a soft texture while
It has sufficient windproof performance. Further, the method of the present invention can efficiently produce such a windproof knitted fabric, and its usefulness is obvious.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing an example of the cross-sectional shape of the splittable composite yarn used in the present invention, Fig. 2 is an organization chart showing the main knitted fabric, and Fig. 5 is an illustration of the present comparative example (single I-structure knitted fabric). The organizational chart, FIG. 4, is an electron micrograph (50x magnification) of a cross section of the main knitted fabric, showing the shape of m-fibers.

Claims (2)

[Claims] (1) In a multilayer knitted fabric consisting of a front weave, back weave, and middle layer weave, the front and back weave are made of multifilament yarns with a single yarn fineness of 2 denier or more, and the middle layer weave is made of multifilament yarns with a single yarn fineness of 1 denier or less. Half loop length of filament thread 3
．． A windproof knitted fabric characterized by a sufficiently dense structure knitted with a thickness of 5 mm or less. (2) A front knitted structure using splittable composite fibers with a single filament fineness of 1 denier or less after fibrillation in the middle layer and multifilament yarns with a single filament fineness of 2 denier or more on the front and back sides,
A method for producing a windproof knitted fabric, which comprises knitting a multilayer knitted fabric consisting of a back knitted structure and a middle layer knitted structure, and then splits and shrinks the splittable composite fibers.