JPS592139Y2 - intertwisted yarn - Google Patents

Description

[Detailed description of the invention] This invention relates to intertwisted yarn that is rich in design effects.More specifically, it effectively utilizes short fiber groups and filament yarns with different latent shrinkage properties, and creates a three-layer structure through heat treatment to create a bulky yarn. The object of the present invention is to provide a twisted yarn whose surface morphology can be changed to give a great design effect.

Conventionally, acrylic bibulk yarn has been known as a spun yarn obtained from fibers with different shrinkage rates, that is, different latent shrinkages, due to thermal treatment with hot water or steam, but this spun yarn has a uniform Since it is based on blended spinning, it has the disadvantage that even if it is bulky, it does not change the surface morphology and can only produce yarns with poor design effects.

On the other hand, when it comes to intertwisting spun yarns and filament yarns, covering yarns, core yarns, etc. have poor design effects, and even when it comes to designed twisted yarns, they are basically simple spun single yarns that change their shape by intertwisting them with filaments. In the latter case, especially in order to obtain a medium-fine count design yarn, the constituent spun yarns and filaments must also be prepared with a fine count and fine denier, which inevitably limits the count of the design yarn. It had a big problem.

The present inventors have diligently devised a new spun yarn that has a design effect not found in such conventional spun yarns and is also highly practical as a yarn for clothing, and as a result they have arrived at the present invention.

That is, the gist of the present invention is that non-shrinkable short fiber group A and latent shrinkable acrylic short fiber group B with a shrinkage rate of 30 to 50% in hot water are formed in two layers within the yarn cross section. unevenly distributed in and A:
A twisted yarn that produces a design effect by heat treatment, which is obtained by intertwisting a spun yarn in which the weight ratio of B is 3 to 7:3 and a latent shrinkable filament yarn with a shrinkage rate of 10 to 30%. .

When the intertwisted yarn of the present invention is subjected to moist heat treatment, it has a three-layer structure consisting of a group of highly shrinkable acrylic short fibers in the core, filament yarns around it, and non-shrinkable short fibers in a spiral shape in the outermost layer. As a result, as shown in Figure 2, the fiber groups are intertwined, and as a result, the surface morphology is extremely uneven, and the luster of the filaments is moderately expressed through the gaps between the short fiber groups in the outermost layer, resulting in a yarn with extremely high design effects. is obtained.

Furthermore, as mentioned above, the present invention allows complex designs to be created by simple twisting, and yarns of medium and fine count can be easily obtained, and by making strong use of filament yarn, it can be used for fine gauge jersey applications, etc. It is very suitable for various clothing uses and also for indoor uses such as curtain trays, making it highly practical.

Next, the present invention will be explained in more detail with reference to the drawings.

FIG. 1 is an explanatory diagram showing an example of the manufacturing process of the spun yarn of the present invention, in which non-shrinkable short fiber groups A and 30
Acrylic short fiber group B with a latent shrinkage of ~50% is supplied in a combined state, and the final roller part 2 has a shrinkage of 10~30%.
A latent shrinkable filament yarn C is inserted and then simultaneously heated in the heating section 3 to obtain a twisted yarn.

FIG. 2 shows a side view and a cross section of a yarn obtained with such a fiber configuration after heat treatment.

In Figure 2, A is the spun yarn (raw silk) of the present invention;
C is a shrinkable filament yarn.

The present invention utilizes fibers with different shrinkage properties within the cross section of a single filament, and in order to maximize their effects, they are distributed independently and unevenly, and a fiber with high shrinkage performance is used on one side, and the filament yarn is made strong. It is characterized by a yarn structure that serves as a reinforcing material and to maintain the yarn surface effect.

As a result of various studies on the weight ratio of the non-shrinkable short fiber group A and the shrinkable fiber group B of the present invention, it was found that a range of 3-near to 7:3 provides the highest design effect.

If the proportion of shrinkable short fiber group B is less than 30% and the proportion of non-shrinkable short fiber group A exceeds 70%, a sufficient change in appearance will not occur even after heat treatment; Similarly, even if the proportion of B exceeds 70% and the proportion of non-shrinkable short fiber group A becomes less than 30%, a sufficient change in appearance will not occur.

In the present invention, both short fiber groups A and B may be unevenly distributed in the yarn cross section either in a sand-by-side manner or in a concentric circular manner.

Further, in the present invention, the spun yarn and the filament yarn are intertwisted, but if they are simply pulled together without intertwisting, it is not possible to obtain a desired unevenness effect even if heat treatment is performed.

As is clear from this system configuration in Figure 2, it has a three-layer structure,
The yarn strength after heat treatment is made up of high shrinkage fibers and filament yarns with a hot water shrinkage rate of 10% or more, but since most of the yarn can rely on filament yarns, it has electrical properties and can be twisted. As a yarn, there is little twist restriction and can exhibit heat treatment effects, and furthermore, it is possible to improve the spinning speed and has high productivity.

Example 1 Polyacrylonitrile fiber 2 denier (single fiber denier) non-shrinkable fiber of 51 mm (fiber length) and polyacrylonitrile fiber 3 denier with shrinkage rate of 35% (in hot water),
A 51 mm roving yarn of 0.35 g/m each was made using a normal spun spinning process, and the yarn was set in the apparatus shown in FIG. 1 using a double roving method, and a 1/60 M, C yarn (twisted yarn: 920 T/M) was spun.

At this time, a polyester filament 50 denier/24 filament having a shrinkage rate of 35% (in hot water) was passed through the final roller section and heated at the same time as the short fiber group was spun.

As a result of heat-treating the obtained intertwisted yarn with steam at 100°C, it was possible to obtain a yarn with a large surface effect as shown in the opening of Figure 2.

The double yarn tenacity was 556.5 g (256.5 g without filament yarn under the same conditions), and there were no problems with the reduction of surface effects in post-processing and passability, and the result was good.

Example 2 Polyacrylonitrile fiber 3 denier, 102 mm non-shrinkable fiber and 5 denier polyacrylonitrile fiber with 35% shrinkage (in hot water) 80 mm:
20, each braided yarn was made using the usual first combing process, and at the same time, the double roving was applied to the device shown in Figure 1.
36 M, C yarn twist number 400 T/M) A polyester filament with a shrinkage rate of 10% (in hot water) is passed from the final roller part into a 50-tenure/24 filament yarn and simultaneously heated and spun to create a twisted yarn. I got it.

When the obtained intertwisted yarn was heat-treated with steam at 100°C, a yarn with a large surface effect as shown in FIG. 2 could be obtained.

The single yarn strength is 120 if there is no filament yarn.
The weight of the product was 352g, which gave strong reinforcement, and there were no problems with post-processing, and the product's texture and surface effects were interesting.

[Brief explanation of drawings]

Fig. 1 is a side view showing an example of the device used to produce the twisted yarn according to the present invention, Fig. 2 A is a side view (left side) and cross-sectional view (right side) of the twisted yarn according to the present invention, Fig. 2 The opening is a side view (left side) and a cross-sectional view (right side) after the yarn in Figure 2 A has been heat-treated. In the heating section, A is a group of non-shrinkable short fibers, B is a group of shrinkable short fibers, and C is a shrinkable filament yarn.

Claims (1)

[Scope of utility model registration request] Non-shrinkable short fiber group A and shrinkage rate in hot water is 30-50
% latent shrinkable acrylic short fiber group B is unevenly distributed in two layers within the yarn cross section, and the weight ratio of A:B is 3 near to 7:3, and the shrinkage rate in hot water. A twisted yarn with a filament yarn having a latent shrinkage of 10 to 30%, which produces a design effect through heat treatment.