JPH0317953B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing a high-density woven fabric that has a soft, spun-like appearance and feel, and a luxurious feel.

The spun-like high-density fabric obtained by the method of the present invention takes advantage of its characteristics to be used in various outerwear such as down-filled materials, coats, jackets, and blouses, and various sportswear such as ski wear and golf wear. In addition, it can be widely used for building and sleeping materials.

[Prior art] Conventionally, a method of weaving and finishing by weaving fine-count cotton yarn, which is a material suitable for densely woven fabrics, both vertically and horizontally, is generally known and has not been put into practical use. However, such woven fabrics have low weaving efficiency due to the ultra-high density of fine-count cotton threads, and the products have a thick feel.Furthermore, they are expensive due to the use of large amounts of high-quality threads, making them expensive. It had the disadvantage that it was difficult to popularize it to the general public.

Therefore, materials have been developed using synthetic long-fiber yarns, and ultra-high-density woven fabrics such as taffeta using nylon filaments have been proposed. However, weaving efficiency is low because the weaving technology used to achieve ultra-high density is generally extremely difficult, and the products have a hard texture and lack quality such as luster, which has become a barrier to commercialization. Ta.

On the other hand, in order to improve such problems even slightly, Japanese Patent Application Laid-Open No. 57-117647 and Japanese Patent Application Laid-open No. 58-76569 have been published.
In the publications, a fibrillated composite filament with a specific cross-sectional shape is used, and the fibers constituting the woven fabric are shrunk by chemical treatment to increase the density without requiring special densification on the weaving surface. High-density textile technology has been proposed.

However, since the surface of these fabrics is covered with filament yarns that do not shrink, they have a paper-like texture with a "slimy" or "cool" feel similar to raw silk, and a lackluster luster that lacks dignity. However, the soft, supple, bulky texture that is characteristic of original high-density fabrics made from fine-count cotton yarn, as well as the natural surface luster and appearance, are unrivaled, and the high-class image is lost. However, there remained the problem that it would be lost.

[Problems to be Solved by the Invention] In view of the above-mentioned points, an object of the present invention is to provide a textile product that exhibits high density and softness without requiring particularly high density in the weaving process. It is an object of the present invention to provide a method for producing a spun-like high-density fabric having a spun-like texture and appearance with high bulk and high bulk.

[Means for Solving the Problems] The method for manufacturing a spunlike high-density fabric of the present invention that achieves the above-mentioned object has the following configuration.

That is, the method for producing a spunlike high-density fabric of the present invention involves producing a fibrillated composite filament yarn made of a polyamide component and a polyester component that has been previously subjected to fluid turbulence treatment at an overfeed rate of 5% or more to form rings and slack. After weaving, the polyamide component and the polyester component are fibrillated by treating the polyamide component in the woven fabric with an agent that causes the polyamide component to swell and contract, and the polyester component of the fibrillated composite filament is The fibers are made to manifest the ring and sagging ability imparted by the fluid turbulence treatment to the surface of the fabric.
A span that is characterized by forming 10 or more rings or slacks per cm ² , and in the inner layer of the fabric, polyamide fibers are shrunk and pushed into the inner layer to form rings or slacks. This is a method for producing like high-density fabrics.

[Function] Hereinafter, the method for producing a spunlike high-density fabric of the present invention will be described in more detail.

The method for producing a high-density fabric of the present invention includes first weaving a fabric using at least a fibrillated composite filament fluid treatment system made of a polyamide component and a polyester component that have been subjected to fluid turbulence treatment, and then The woven fabric is subjected to chemical treatment to fibrillate the polyamide component and polyester component, and at the same time, the ability to develop rings and sagging, which is imparted to the polyester component by fluid turbulence treatment at the yarn stage, is removed. This causes a large number of rings or sag to form on the outer surface of the fabric, specifically 10 or more rings/sag per 1 cm ² .

The above-mentioned chemical treatment is capable of fibrillating both components and shrinking at least one component, using a drug that can swell and shrink one component, and a known solvent used to exfoliate and fibrillate both components. etc. can be used.

To explain more specifically, the fibrillated composite filament yarn has an overfeed rate of 5% in advance.
The above fluid turbulence treatment is performed to form rings and slack. However, it is important that the size or number of these rings or slacks be kept within a range that does not impair weavability. In other words, even if it is assumed that the weavability is poor due to the presence of rings or slack, and additional reinforcement is performed to improve the weavability, the fibrillation of both components in the fabric will not be sufficiently performed. For this reason, it is important to keep the conditions for fluid turbulence treatment loose and to make loops and sagging latent.

During the fluid turbulence treatment, if the overfeed rate of the fluid turbulence treatment conditions or the fluid pressure is increased and the processing speed is lowered, the number of rings and slack in the fabric will increase, and the spun-like effect will increase. . Further, the effect of the present invention will be even greater if a plurality of fibrillated composite filament yarns are fed in a line or with a difference in yarn feeding and subjected to fluid turbulence treatment. This is because rings and slacks are more likely to protrude from the outer surface of the fabric due to fibrillation in the fabric and differential shrinkage between the supplied yarns. By the way, when the composite filament is fibrillated, the more rings and slacks there are, the more the span-like texture and appearance will be emphasized, and the larger the size of the rings and slacks, the softer and more supple the filament will be. On the other hand, if it becomes finer, it will emphasize the firmness, tension, and waist.

It should be noted that even if a simple interlacing process is performed using an interlacer, the rings and sagging that are the intended aim of the present invention cannot be obtained, and the span-like effect cannot be obtained. It is essential to carry out the necessary processing.

The weaving conditions are not particularly different from normal weaving operations, and there is no need to adopt special conditions such as weaving structure and high-density design, and the conditions may be appropriately determined as desired.

The surface of the fabric woven in the above manner is a raw fabric with some rings or sagging, or almost no rings or sag.

Next, this raw fabric is subjected to a chemical treatment that causes both components to fibrillate, but one of the components is treated with a drug that can swell and contract, and a solvent that can exfoliate and fibrillate both components. For example, in the case of swelling treatment of polyamide, benzyl alcohol, β-phenylethyl alcohol, phenol, m-cresol, acetic acid, etc. can be used. It is effective to use an aqueous emulsion, for example, 20% benzyl alcohol, 2% emulsifying dispersant, 78% water.
It is sufficient to carry out immersion treatment at 10 to 50°C with a suitable emulsion. In addition, the treatment with a solvent may include treatment with an alkaline chemical at an appropriate temperature capable of dissolving the polyester component, and the constituent components are shrunk by the heat of the treatment.

Through these fibrillation treatments, the fibrillated composite bulk yarns constituting the fabric undergo a substantial fibrillation phenomenon, and, for example, in the example shown in Figure 1, the polyamide component may swell or contract. When treated with a chemical, the fibers with a radial cross section, that is, the filaments of polyester A, protrude from the surface of the fabric to form rings and slacks and cover the surface of the fabric, creating a spun-like texture. The other polyamide B swells and contracts to form a dense fabric. Although rings and sag are formed in the single fiber filaments of the polyamide component located in the inner layer, they are hardly noticeable because the material is often shrunk. In this way, the composite filament has a multilayer structure after fibrillation. This multi-layered structure of yarn is also utilized in textiles,
The outer surface of the woven fabric of the present invention is covered with a large number of rings and slacks made of a polyester component.

That is, in the present invention, the polyester fibers form rings or slacks that protrude from the surface of the fabric, emphasizing the spun-like texture and appearance, and the multilayer structure provides a rich sense of volume, and the polyamide fibers do not swell. Since it is pushed into the inner layer of the fabric as it shrinks, rings and slacks are also present in the inner layer of the fabric, making it possible to create a soft-textured fabric with a high density but no core hardness.

In the present invention, the fibrillated composite filament fluid-treated yarn is preferably used at least for the weft yarn, and for the warp yarn, synthetic long fiber yarn or short fiber yarn is suitably added depending on the desired textile properties. For example, a polyester yarn having a single fiber denier of 1 denier or less is suitable, or a fibrillated composite filament yarn may be used.

Further, the bonding ratio of both the polyamide and polyester components of the fibrillated composite filament used in the method of the present invention is preferably in the range of 0.05 to 0.95. The composite filament usually has a cross-sectional shape that can be easily fibrillated due to the difference in the properties of the two components, for example, one component and the other component have a shape that extends radially in at least two directions, and It is composed of segments that connect segments, and various known ones such as the one described in the above-mentioned Japanese Patent Application Laid-Open No. 117647/1983 can be used. That is, an example of the model structure of such a fibrillated composite filament is, for example, the first one.
As shown in the figure, the B component is a swelling type shrinking part, the radially extending shape A component is a non-swelling type non-shrinking part, and on the other hand, polyamide is used on the radial fiber component side. , those using polyester on the other side can also be effectively used in the method of the present invention.

[Effects of the Invention] In the high-density woven fabric obtained by the present invention, the polyester fibers form 10 or more rings or slacks per cm ² and protrude from the surface of the woven fabric, emphasizing the spun-like texture and appearance. Because it has a multi-layered structure, it has a rich sense of volume, and as the polyamide fibers swell and contract, they are pushed into the inner layer of the fabric, so rings and sagging also exist in the inner layer of the fabric.
It is possible to create a fabric with a soft texture that has a high density but does not have a hard core.

First, in terms of texture, drape, volume,
It is soft, has a spun-touch fabric surface, and has a cotton-like feel because fibrillated composite filament yarns generally have a single fiber denier of 1 denier or less after fibrillation.
In addition, the appearance does not have the "shiny" or "waxy" luster of conventional filament-like products, which lacks dignity, but instead has a mild, deep, natural luster that can give the image of a luxury product. It is.

In addition, in the past, it was natural to increase the density of the fabric in the vertical and horizontal directions in order to obtain a high-density fabric, but according to the present invention, the fabric can be woven by fibrillation, shrinkage, and high bulk. Since a high-density woven fabric can be obtained without necessarily having a high density, there is no need for special weaving conditions, and weaving design and weaving work are easy.

In addition, the surface of the fabric is covered with countless ultra-fine denier rings and slacks, giving it a high bulkiness, making it a fabric with excellent heat retention, moisture absorption, and moisture permeability. sports,
It can be effectively used for outerwear applications.

[Example] Hereinafter, the specific structure and effects of the method for producing a spun-like high-density fabric of the present invention will be explained with reference to Examples.

Example 1 A fibrillated composite filament yarn of 80% nylon and 20% polyester, 50 denier, 24 filaments (8 radial segments) was subjected to fluid turbulence treatment under the following conditions to produce a high bulk composite filament turbulent fluid treatment.

Processing speed 300m/min Fluid turbulence pressure 8Kg/cm ² Overfeed rate +10% Nozzle Heberline (LBO2-T100 type) Next, nylon 70 denier, 72 filament yarn with a density of 101 threads/inch was used as the warp thread. ,
Using the above composite filament yarn as the weft yarn, the density
Horizontal implantation was performed at 76 holes/inch, and swelling treatment was performed under the following conditions.

Benzyl alcohol 20% Emulsifier (Sunmol BK-20) 2% Water 78% The treatment was carried out by keeping the above chemical at 30°C and immersing it in it for 5 minutes, followed by washing with hot water and air drying.

Through the above treatment, both components are fibrillated,
A high-density fabric rich in spun-like properties according to the present invention with a length of 162 pieces/inch and a width of 81 pieces/inch could be obtained.

In addition, in this fabric, the shrinkage rate of the fabric after the swelling treatment was 10% in the vertical direction and 29.3% in the horizontal direction. The cross-section of the fabric consists mainly of shrunken polyamide fibers in the inner layer of the fabric, and polyester fibers mainly in the outer layer of the fabric, in which both components are fibrillated, and the outermost surface of the fabric contains polyester rings and polyester fibers. It was a good span-like product with many slacks. The number of loops and slacks per 1 cm ² was actually measured using a microscope, and the average value, where n was 5, was 13 pieces/cm ² .

Comparative Example 1 A fibrillated composite filament yarn similar to that used in Example 1 was subjected to temporary twisting under the following conditions to produce a high bulk composite filament.

Processing speed: 80m/min Set temperature: 180℃ Tentative twist count: 4500T/m Overfeed rate: 0% Next, this yarn was used as a weft yarn, and the same warp yarn usage, weaving structure, and weaving density as in Example 1 were used. When the threads were inserted and woven, and the same swelling treatment as in Example 1 was performed, the result was 135 yarns/inch in the vertical direction and 79 yarns in the horizontal direction.
A fabric of 1/inch was obtained. The shrinkage rate of this fabric after swelling treatment is 0% in the vertical direction and 0% in the horizontal direction.
It was 11.2%.

The cross-sectional structure of the fabric thus obtained was one in which polyamide fibers and polyester fibers were fibrillated and divided, but the fabric surface had a plain surface with no loops or rings at all, and spanned It has no like feeling at all,
Also, the cheap gloss was noticeable.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a model showing an example of the structure of a fibrillated composite filament that can be used in carrying out the method for producing a spunlike high-density fabric of the present invention. A: polyester component, B: polyamide component.

Claims (1)

[Claims] 1 Weaving using at least a fibrillated composite filament yarn made of a polyamide component and a polyester component that has been previously subjected to fluid turbulence treatment at an overfeed rate of 5% or more to form rings and slack,
After weaving, the polyamide component is treated with a drug that causes it to swell and contract in the state of the woven fabric, thereby fibrillating the polyamide component and the polyester component, and the polyester fibers of the fibrillated composite filament are subjected to the fluid turbulence treatment. 10 per cm ² on the surface of the fabric to reveal the ring and sagging ability imparted by
A spun-like high-density fabric characterized by forming more than one ring or slack, and in the inner layer of the fabric, polyamide fibers are shrunk and pushed into the inner layer to form rings or slack. manufacturing method.