JPS593576B2 - Manufacturing method of yarn for crepe textiles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spun yarn for crepe fabric using synthetic fiber spun yarn, and more specifically to a synthetic polymer that causes dissolution and flow due to a liquid (solvent) and a synthetic polymer that causes dissolution and flow due to the solvent. Synthetic polymer 2 which causes dissolution and flow by treating filament-like strongly twisted yarn produced by spinning or mixed spinning using a stable obtained by composite spinning with a synthetic polymer with no synthetic polymer in a highly twisted state with the above solvent. By dissolving and flowing on the yarn surface, it is possible to create synthetic polymer fibers that do not dissolve and flow due to solvents, or blended fibers without reducing the strong twisting torque required to generate grain, such as the degree of frizz and shrinkage rate of fibers. By directly fixing the twist by coating the synthetic polymer fibers or blended fibers around them by dissolving and flowing the synthetic polymer, and by creating a texture after weaving, we can create a yarn that is not seen in conventional synthetic fiber spun yarns. The present invention relates to a method for producing a synthetic fiber spun yarn to obtain a crepe fabric having a texture.

Conventionally, there are many methods for producing threads for crepe fabrics using synthetic fiber spun threads, but none of these methods has led to the production of crepe fabrics having the same grain and texture as conventionally seen in natural fibers.

That is, in the conventional production of crepe fabrics, the twist was fixed at one time and the preparation was carried out without reducing the degree of twist and shrinkage rate.
In order to facilitate handling in the weaving process, etc., it is necessary to twist and fix the highly twisted yarn of the synthetic fiber spun yarn using high temperature heat, which causes the synthetic fiber to undergo thermal deformation and reduce its friability. This results in a contradictory result in that the shrinkage rate and other factors decrease.

For this reason, it has been difficult to stably produce a satisfactory grained fabric.

In addition, in the conventional method of temporarily fixing the twist using a sizing agent, uneven adhesion of the sizing agent or adhesion between yarns due to the sizing agent may occur, and even when sizing and setting are performed, the setting temperature may vary. If the relationship between the material and the glue is not carefully considered, rewinding, cracking, uneven adhesion, etc. will be a problem during weaving, and even if wood is woven, snarl-like defects will appear on the woven fabric surface, making it difficult to produce a satisfactory product. Met.

There is also a method disclosed in Japanese Patent Application Laid-open No. 50-83547 as an example of a prior application, but this method uses filament threads and does not have fluff, so the texture is not satisfactory, and it is difficult for people with a weight of over 200 deniers to Even if the weight loss is reduced, the texture remains rough and hard.

This is because the highly twisted filament yarn has no looseness in its yarn structure.

The purpose of the present invention is to improve the above-mentioned drawbacks of the prior art.It is extremely easy to handle even though it is in a highly twisted state, and when made into a woven fabric, it has a texture similar to natural fibers in texture, texture, and volume. The present invention provides yarn for crepe fabrics.

The manufacturing method of the present invention will be described below.

The present invention preferably uses a synthetic polymer 2 that dissolves and flows in a liquid (solvent) at a temperature of 0 to 100°C and a synthetic polymer 1 that does not dissolve and flow in the liquid in a cross-sectional form as shown in FIGS. 1 and 2. The fibers are composite-spun and then drawn and cut into staples.

Using this stable, blend with other fibers 3 or 100
% to produce spun yarn.

The yarn thus obtained is further twisted to obtain a highly twisted state, and in this state, the synthetic polymer 2 is dissolved and flowed in the liquid at 0 to 100°C to temporarily fix the twist. It is.

In order to obtain grain, the total twist coefficient of the spun yarn must be 5.0 or more.

The temperature of the liquid for temporarily fixing the twist must be below the temperature at which the synthetic polymer 1 or other fibers 3 are not heat-set, that is, below the temperature at which the twisting torque due to strong twisting is not reduced.

Here, dissolving and flowing with a solvent does not mean dissolving and removing the synthetic polymer 2 with a solvent, but rather making it flow so as to cover the synthetic polymer fibers 1 or other fibers 3 by dissolving them. This can be achieved by reducing the concentration or shortening the processing time.

In the present invention, a crepe fabric can be obtained by forming the synthetic fiber spun yarn, which has undergone the above-mentioned twist fixation, into a fabric, and then subjecting the fabric to a texturing treatment with hot water or a solvent at 40 to 100°C.

Figures 1 and 2 are diagrams showing cross sections of composite fibers used in the present invention, and Figure 1 shows a core in which a synthetic polymer fiber 1 is coated with a synthetic polymer component 2 that is dissolved and flowed by a solvent. This is a pod-shaped conjugate fiber, and FIG. 2 shows a type of conjugate fiber with a core-sheath structure in which a multicore synthetic polymer fiber 1 is coated with a synthetic polymer component that is dissolved and flowed by a solvent.

The above is just one example, and any composite fiber in which the synthetic polymer fiber 1 and the soluble synthetic polymer 2 exist in a cross-sectional form that is easy to spin may be used.

FIG. 3 is a cross-sectional view of a yarn obtained by blending the composite fiber of FIG. 2 with other fibers 3.

Also, the ratio of synthetic polymer fiber 1 to soluble synthetic polymer 2 is 5.
The ratio of 0 to 90:50 to 10 is good, and even within this range, synthetic polymer fiber 65:soluble synthetic polymer 35 has excellent spinnability.

When the twist is fixed at 1, the component of soluble synthetic polymer 2 is 5% in the spun yarn.
It is sufficient that the content is 0 to 8% (for example, when spinning the spun yarn 308, the ratio of the composite fibers is 60:40, 40% of the fibers are mixed with 60% of the soluble synthetic polymer component, and the soluble synthetic polymer component is 1.
6%).

In addition, due to the dissolution and flow of the soluble synthetic polymer, the synthetic fiber spun yarn becomes in the same state as sizing, so sizing is not required, and it has excellent bundling properties, and has excellent weaving properties even when used for warp and weft yarns of textiles. No problem at all.

Moreover, after weaving, the warp and weft yarns are less likely to be flattened due to interlacing pressure generated between them, so the crimp of the weaving yarns becomes large, similar to that of natural fiber fabrics, and the soluble synthetic polymer 2 is eluted with a solvent. A crepe fabric with a rich sense of volume can be obtained by removing the material.

To explain this in detail, soluble synthetic polymers such as polyvinyl alcohol, polyethylene, and polystyrene that dissolve and flow in water or simple solvents (e.g., polyethylene: percrene, polystyrene, trichrene, etc.) and the liquid. Composite spinning with synthetic polymers such as polyester and polyamide that do not cause melt flow.

Next, it is stretched and cut to make a staple for spinning, and the staple is used to blend it with other fibers 3 or to spin it 100%.

Next, the spun yarn is generally additionally twisted to have a twist coefficient of 2 or more to give a total twist coefficient of 5.0 or more, and a solution in which the soluble synthetic polymer of the additionally twisted yarn dissolves and flows, such as polyvinyl alcohol, is added. In the case of a system, after immersion treatment in warm water of 0 to 80°C, drying is performed and the twist is fixed at one time.

The additional twist yarn thus obtained is woven using warp yarns, weft yarns, or only weft yarns.

Afterwards, the crepe fabric is textured with hot water or a solvent to produce a crepe fabric with good quality texture.

Next, by removing the soluble synthetic polymer component from the textured fabric thus obtained, a crepe fabric rich in texture, texture, and volume can be obtained.

In addition, in the above explanation, the twist coefficient is -T// to twist coefficient This is the value expressed as .

However, here, T is the number of twists (twists/inch), and N is the English cotton count of the spun yarn.

Due to the flexibility of the yarn due to fluff, the spun yarn of the present invention has a well-balanced texture and deep grain.

In addition, it has good setability to prevent twisting and is excellent in operability.

Furthermore, since the tip has already been twisted, less additional twisting is required, and non-uniform areas such as double twists are extremely unlikely to occur, so the texture is more similar to silk crepe.

Example 1 Polyamide-based synthetic fiber yarn and polyvinyl alcohol fiber yarn were combined at a composite ratio of 65:35, cross-sectional form in Figure 1, denier 2d, and fiber length 517It7.
IL), make it stable.

Using the stable, 408 was spun with a twist coefficient of 3.4, and the spun yarn was subjected to an additional twist of 4, and then treated with water at 30°C for 20 minutes and dried. When the twist was fixed at 1 o'clock, the twist index was 15, which is not a problem for weaving.

After weaving willow crepe using this extra-twisted thread as the weft thread,
After raising the temperature from water at 30°C to 80°C, the grain was set, and then the grain was set using dry heat at 160°C, and then the polyvinyl alcohol fiber threads were completely removed with hot water. A willow crepe fabric with rich texture and volume was obtained.

Example 2 Composite ratio of polyester fiber and polystyrene was 6:4,
The cross-section is as shown in Fig. 2, the denier is 3D, the fiber length is 51 mm (combined spinning, drawing and cutting), and the fiber is stable.

Using this stable, 248 was spun with a twist coefficient of =3.2, and the spun yarn was subjected to additional twisting of =4.5, and then treated with a 3% solution of benzyl alcohol for 30 minutes. 1
When the time was fixed, the vibration index was 10, which is not a problem for weaving.

This extra-twisted yarn is used as a weft yarn, and after weaving is carried out in alternating two-way weaving, it is embossed with hot water at 95°C, and then at 180°C.
After finishing setting with dry heat, the polystyrene was removed by treatment with trichlene, and a crepe fabric with excellent texture and texture was obtained.

Example 3 The composite fiber of Example 2 and polyester fiber 2d x 51 were mixed at a ratio of 50:50, and 3O8 was spun with a twist coefficient of 3.2, and the spun yarn was given an additional twist of 4.0. After this, it was treated with a 3% benzyl alcohol solution for 40 minutes to fix the twist.

This additionally twisted yarn is woven into a georgette crepe by alternating the S twist and the Z twist for both the warp and weft yarns, and after weaving, the
A georgette crepe with excellent texture, volume, and grain was obtained by carrying out a graining treatment with hot water at 170 °C, then setting the woven structure with dry heat at 170 °C, and removing the polystyrene with trichlene.

[Brief explanation of drawings]

FIGS. 1 and 2 are cross-sectional views of composite fibers used in the present invention. FIG. 3 is a cross-sectional view of a blend of the composite fiber of the present invention and other fibers. 1: Synthetic polymer that does not cause dissolution and flow due to solvent, 2:
Synthetic polymer that dissolves and flows with a solvent. 3: Blended fiber.

Claims (1)

[Claims] 1. A spun yarn made of stable fibers obtained by composite spinning a synthetic polymer that dissolves and flows in a solvent and a synthetic polymer that does not dissolve and flow in a solvent, or a yarn made of stable fibers and other fibers. After making a blended spun yarn of 1. A method for producing spun yarn for crepe textiles, characterized in that twisting is achieved by dissolving and flowing a synthetic polymer on the yarn surface.