JPS5929970Y2 - bulky knitted fabric - Google Patents

Description

[Detailed description of the invention] This invention relates to bulky knitted fabrics, and more specifically, bulges,
This relates to a bulky knitted fabric that is excellent in softness, firmness, and elasticity.

Traditionally, woven and knitted fabrics made of multifilament yarns have suffered from unfavorable texture evaluations, such as the so-called synthetic fiber touch, such as flatness, roughness, stiffness, sliminess, and coldness. The current situation is that there is a strong desire for improvement, as there is also an orientation towards differentiated materials.

In view of the current situation, the purpose of the present invention is to provide a bulky knitted fabric that is excellent in fullness, softness, firmness, and waist.

In order to achieve the above object, the present invention has the following configuration.

That is, the present invention uses a multifilament yarn with a single filament fineness of 3 deniers or less and a boiling water shrinkage rate of 25% compared to the yarn.
High-shrinkage thermoplastic synthetic fiber multifilament yarn (hereinafter referred to as high-shrinkage yarn) is lower-twisted at a twist rate of 300 T/M or less, and the gathered twisted yarns are twisted together at a twist rate of 200 T/M or less. The gist is a bulky knitted fabric made by weaving and knitting yarns that are twisted together at a certain number of twists.

Here, the multifilament yarn referred to in the present invention may be any multifilament yarn that is substantially non-bulky and non-crimped, and is a very commonly used multifilament of thermoplastic synthetic fiber. Typical examples of such yarns include drawn yarns and multifilament yarns of viscose rayon.

In the past, the high shrinkage yarn used in the present invention had a spinning speed of 2.
Semi-drawn polyester yarn (boiling water shrinkage rate 40-70%) obtained by high-speed spinning at 000 m/min or more, and unheated polyester drawn from undrawn yarn at room temperature (15-50'C) Stretched yarn (boiling water shrinkage rate 30
~70%).

(1) In accordance with the present invention, a multifilament yarn with a single filament fineness of 3 deniers or less and a boiling water shrinkage rate of 2
The reason for using a high shrinkage yarn with a diameter of 5φ or more is to make a large number of delicate and minute loops of single yarns that make up the multifilament yarn with low shrinkage appear on the surface of the fabric after dyeing and to reduce shrinkage. This is because the large, high-shrinkage yarns are concentrated and arranged around the core of the twisted yarns, giving them fullness, softness, firmness, and firmness to the woven or knitted fabric.

In the present invention, the single yarn fineness of the multifilament yarn is set to 3 denier or less because the softness of the woven or knitted material gradually decreases when the single yarn fineness of the multifilament yarn exceeds 3 denier. This is because when the number of fibers exceeds 1, the resulting woven or knitted fabric has a rough and hard feel similar to that of conventional multifilament woven or knitted fabrics.

In addition, the reason why the difference in boiling water shrinkage rate between the multifilament yarn and the high shrinkage yarn is set to 25% or more in this invention is that the difference in boiling water shrinkage rate is less than 25%, and the swelling increases.
...It is becoming increasingly difficult to obtain woven and knitted fabrics with excellent elasticity, and when the difference in boiling water shrinkage rate is less than 20%, they begin to have the same flat, slimy, and cold feel as conventional multifilament woven and knitted fabrics. Furthermore, the fabric tends to lack firmness and elasticity.

(2) Lower twisting is performed at a twist rate of 300 T/M or less, and the collated yarns are earth-twisted together at a twist rate of 200 T/M or less. This is to further increase the quality of the product by forming it into threads, and at the same time to stably embody the young fruits in woven and knitted fabrics without any unevenness.

Furthermore, this is to prevent troubles caused by anti-flaming, bunching irregularities, occurrence of loops, sagging between yarns, etc. during the weaving and weaving process.

Here, when comparing the single twisting method (combined twisting with only one earth twisting) and the lower combined twist → upper combined twist method, the latter is significantly superior in the above-mentioned effect.

When changing from lower plying to upper plying, it is necessary to pay special attention to the number of twists.As the number of collated twists and the number of upper ply twists increases, the cohesiveness of the yarn also increases. Although the stiffness increases, on the other hand, the bulge and softness of the woven or knitted fabric decreases at an accelerated rate, and the yarn torque also increases, making it difficult to handle the yarn. It becomes difficult to do.

According to the inventors' experiments, the number of twists in the case is 300 T/M or less, preferably 300 to 80 T/M, and the number of twists in the upper stand is 20.
0 T/M or less, preferably 200 to 80 T/M, it is possible to obtain a bulky knitted fabric with excellent fullness, softness, and elasticity without any trouble due to yarn torque. found.

When the number of collated twists exceeds 300 T/M, the resulting yarn tends to be in a so-called "tight" state, and the occurrence of minute and minute loops on the surface of the woven or knitted fabric after dyeing is extremely rare. However, it is difficult to obtain a woven or knitted fabric that has better fullness, softness, etc. than conventional woven or knitted fabrics, which is the desired goal of the present invention.

When the number of collated twists exceeds 300 T/M, turning torque in the direction opposite to the twisting direction may be observed in the collated and twisted yarns, and in particular, the yarns supplied to the lower gathered twists may have no torque or This tendency is noticeable in the case of low-torque yarns, which tends to cause trouble in terms of yarn handling and process control.

The same problem as described above is observed when the number of twists of the upper stand exceeds 200 T/M.

In other words, since the obtained yarn is a single yarn with +1 tightness, it is difficult to obtain a woven or knitted fabric having the fullness and softness desired by the present invention, and the obtained base twisted yarn also has a strong turning torque. This may be particularly noticeable when the collated yarn supplied to the soil twisting has no or low torque, or when the direction of rotation of the torque of the collated yarn is opposite to the foundation twisting direction. This can easily cause problems in the management of the yarn handling process.

In this invention, the other purpose of performing lower plying → upper plying is to improve the finish (uniformity and stability) caused by the difference in dyeing chromaticity.
The goal is to make things better.

For example, polyester semi-drawn yarns (high shrinkage yarns) generally obtained by high-speed spinning have a significantly darker dyeing color than normal polyester multifilament yarns, so woven or knitted fabrics made from these yarns cannot be dyed. A heathered appearance occurs due to the difference in chromaticity.

The curl of the heather is closely related to the way the yarns with different dyeing chromaticities are twisted. It will get better.

The present invention will be specifically described below with reference to the drawings and examples.

Example 1 Polyethylene terephthalate) 1507' Nyl 50 filament normally drawn yarn 1 (cutting elongation 34.7 or more, boiling water shrinkage rate 11.3%, hexagonal cross section yarn, single yarn fineness 3 denier) and high speed spinning Polyethylene terephthalate semi-drawn yarn 11O denier 36 filament 2 manufactured by the method (spinning speed 3000 m/min).

Cutting elongation: 110%, boiling water shrinkage: 56.9%)
Twisting at 150T/M (double yarn lower plying), collating and twisting 3
(Figure 1) was created.

Next, the three collated twisted yarns are twisted at an S twist of 100 T/M (double yarn upper combined twist) to obtain the base twisted yarn 4 (second yarn) according to the present invention.
Figure) was obtained.

Next, a fabric 5 (Fig. 3) consisting of 100 pieces of this upper twisted yarn 4 (520 denier) was created by the weaving → dyeing finishing method applied to ordinary synthetic fiber filament fabrics [using both warp and weft yarns; 2/ 2 twill structure, finishing density: 54 threads/inch for both warp and warp, disperse dye staining (dark blue)].

The obtained fabric 5 (Fig. 3) has a large number of delicate and minute loops 6 (Fig. 3) made of single yarn (3 denier) constituting polyethylene terephthalate normally drawn yarn on the surface, and the texture is It was full, soft, and had just the right amount of waist, making it very different from conventional synthetic fiber filament fabrics.

Furthermore, this fabric has a dark blue color difference in chromaticity (semi-undrawn yarn 2
is dark and drawn yarn 1 is light).
The texture of this heather was extremely even and gave a sense of calm color.

Example 2 75 denier 30 filament dyed yarn of viscose rayon 1 (flower navy blue, boiling water shrinkage rate 0-1, single yarn fineness 2.5)
denier) and polyethylene terephthalate semi-drawn yarn 80 denier 24 filament 2 produced by high-speed spinning method (spinning speed 4000 m/min, boiling water shrinkage rate 40%)
) were twisted at a rate of 300 T/M (double yarn gathering and twisting) to create gathering and twisting yarn 3 (Fig. 1).

Next, the collated and twisted yarns 3 were twisted at an S twist of 200 T/M (double yarn top twist) to obtain a yarn 4 according to the present invention (FIG. 2).

Next, a knitted fabric 7 (FIG. 4) made of 100% of this base twisted yarn 4 (310 denier) was produced by a knitting→dyeing finishing method applied to ordinary synthetic fiber filament knitted fabrics.

[Motsuku Lanolip, 27 pieces/2, 22 pieces/
② Disperse dye dyeing (Sachs color)] The surface of the obtained knitted fabric has many delicate and minute loops 8 (Fig. 4) made of single yarns (2.5 denier) that make up the viscose rayon yarn. It has excellent fluff and softness, and has a moderate amount of firmness and waist, making it completely different from conventional synthetic fiber filament fabrics.

Furthermore, this knitted fabric had an elegant and deep heathered appearance created by the color mixing effect of navy blue (viscose rayon yarn) and saxophone color (semi-drawn polyethylene terephthalate yarn).

[Brief explanation of the drawing]

Figure 1 is an enlarged view showing an example of the gathered twisted yarn of the present invention, Figure 2 is an enlarged view showing an example of the base twisted yarn used in the present invention, and Figure 3 is an enlarged view showing an example of the gathered twisted yarn of the present invention.
The figure is an enlarged view showing →U of the woven fabric according to the present invention, and FIG. 4 is an enlarged view showing an example of the knitted fabric according to the present invention. In the figure, 1 indicates a multifilament yarn with a single filament fineness of 3 deniers or less, 2 indicates a high shrinkage yarn, 3 indicates a collated twisted yarn, and 4 indicates a base twisted yarn.

Claims (1)

[Scope of utility model registration request] A multifilament yarn with a single filament fineness of 3 denier or less and a highly shrinkable thermoplastic synthetic fiber multifilament yarn with a boiling water shrinkage rate of 25% or more higher than that of the yarn at 300 T.
The number of twists is less than
A bulky woven and knitted fabric made by weaving and knitting yarns that are double-twisted with a twist count of T/M or less.