WO2022255101A1

WO2022255101A1 - Woven fabric

Info

Publication number: WO2022255101A1
Application number: PCT/JP2022/020642
Authority: WO
Inventors: 賢司田上
Original assignee: 株式会社ファーストリテイリング
Priority date: 2021-05-31
Filing date: 2022-05-18
Publication date: 2022-12-08
Also published as: JP7080380B1; JP2022183574A

Abstract

The present invention provides woven fabric having both water absorption and fast-drying properties.　This woven fabric has pile, with the pile formed from fibers with a sheath-core structure comprising core yarn and sheath yarn. The core yarn is formed from synthetic fibers, has a modified cross-section structure, and is crimpable false-twisted yarn. The sheath yarn is formed from natural fibers and has a fiber length of 28-32 mm. The proportion of the synthetic fibers in the woven fabric is 50-55% by mass. The woven fabric comprises: pile yarn constituting the pile; and foundation yarn into which the pile yarn is woven. The fibers with a sheath-core structure are used for the pile yarn and the foundation yarn.

Description

fabric

The present invention relates to textiles.

Pile fabrics, in which pile threads are woven into the ground threads, are highly absorbent and are used for goods such as towels and handkerchiefs, room wear such as bathrobes and slippers, and bedding such as sheets and pillow covers. there is

For ground threads and pile threads, cotton is often used because it has a good texture and is highly absorbent. In some cases, a pile yarn obtained by twisting a natural fiber such as cotton with a synthetic fiber is used (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 2005-52201

Natural fibers such as cotton are short fibers and easily absorb water, but they are prone to fluffing. Natural fibers also dry more slowly than synthetic fibers such as polyester. Synthetic fibers, on the other hand, dry quickly, but the fibers themselves do not absorb water, which reduces the water absorbency of the fabric as a whole.

The purpose of the present invention is to achieve both water absorption and quick-drying properties of the fabric.

One aspect of the present invention is a fabric having pile. The pile is a core-sheath structure fiber consisting of a core yarn and a sheath yarn, the core yarn is a false-twisted yarn made of a synthetic fiber, has a modified cross-sectional structure, and is crimpable, and the sheath yarn is , made of natural fibers, with a fiber length of 28-32 mm. The proportion of synthetic fibers in the woven fabric is 50-55 mass %. The woven fabric includes pile yarns forming the pile and base yarns into which the pile yarns are woven, and the core-sheath structure fibers are used for the pile yarns and the base yarns.

According to the present invention, it is possible to achieve both water absorption and quick-drying properties of the fabric.

FIG. 2 is a perspective view showing the woven structure of the woven fabric of the present embodiment; It is an enlarged view of a pile thread. FIG. 3 is a cross-sectional view of the core yarn taken along line AA in FIG. 2; FIG. 4 is a cross-sectional view of a core yarn showing another example of a modified cross-sectional structure; FIG. 4 is a cross-sectional view of a core yarn showing another example of a modified cross-sectional structure; FIG. 4 is a cross-sectional view of a core yarn showing another example of a modified cross-sectional structure;

Hereinafter, embodiments of the woven fabric of the present invention will be described with reference to the drawings. The configuration described below is an example (representative example) of the present invention, and the present invention is not limited to this.

FIG. 1 shows the woven structure of a towel 10 that is one embodiment of the invention.
The towel 10 is a pile fabric, and the pile yarn 1 is woven into the weft yarn 2 and the warp yarn 3 . The weft threads 2 and the warp threads 3 are called base threads.

The pile yarn 1 is woven to form loops. The towel 10 has a pile 1a which is a loop protruding on one side and a pile 1b which is a loop protruding on the other side.

In the towel 10, rows of continuous piles 1a and rows of continuous piles 1b are alternately repeated. The towel 10 may also have a woven structure with pile on only one side.

The

piles

1a and 1b of this embodiment are 3-pick piles. Therefore, the

piles

1a and 1b having a soft texture can be formed. In the 3-pick method, two weft yarns 2 and pile yarns 1 are woven in this order so that three warp yarns 3 form one pile.

Core-sheath structure fibers are used for the

piles

1a and 1b. A core-sheath structure fiber has a structure in which a core yarn is covered with a sheath yarn. The weft 2 and warp 3 may be synthetic fibers or natural fibers, respectively, but it is particularly preferred that they are also core-sheath structure fibers. By adopting a core-sheath structure for all of the threads 1 to 3 constituting the towel 10, it is possible to provide the towel 10 which is extremely excellent in quick drying and water absorption.

FIG. 2 shows an example of the core-sheath structure of the pile yarn 1. When core-sheath structure fibers are used for the weft 2 and the warp 3, the weft 2 and the warp 3 also have the same structure as the pile yarn 1. The pile yarn 1 of this embodiment includes a bundle of a plurality of core yarns 11 and a sheath yarn 12 wound around the bundle.

The core yarn 11 is made of synthetic fibers, and the sheath yarn 12 is made of natural fibers. By using a soft natural fiber for the sheath yarn 12 of the surface layers of the

piles

1a and 1b, the towel 10 with good touch can be provided.

In addition, natural fibers with excellent water absorbency can quickly absorb a large amount of water adhering to the towel 10. Since the absorbed moisture is diffused along the surface of the synthetic fiber inside the natural fiber, the water absorption time is also short. Since moisture does not stay and evaporates easily by diffusion, the quick drying property of the towel 10 can be enhanced.

Synthetic fibers that can be used for the core yarn 11 include, for example, polyester, nylon, acrylic, and the like. Among them, polyester filament yarn is preferable as the synthetic fiber used for the core yarn 11 from the viewpoint of quick drying.

Examples of natural fibers that can be used for the sheath thread 12 include cotton, silk, hemp, and the like. Among them, cotton is preferable because of its high touch and high water absorbency.

The core thread 11 is a filament thread having a modified cross-sectional structure. Also, the core yarn 11 is a crimped false-twisted yarn. The modified cross-sectional structure refers to a structure having a non-circular cross-section when cut in a direction perpendicular to the length direction of the thread.

When a plurality of core threads 11 are bundled, gaps are formed between adjacent core threads 11 or between core threads 11 and sheath threads 12 . Since the voids extend along the length direction of the core yarn 11, the moisture absorbed by the sheath yarn 12 is diffused throughout the towel 10 through the voids. In addition, air permeability inside the pile yarn 1 is enhanced by the voids. Therefore, the towel 10 dries very quickly.

The core yarn 11 with a modified cross-sectional structure forms more voids than when the cross section is circular. In addition, since the core yarn 11 becomes bulky due to the crimping, the area of the voids tends to widen, and the amount of water to be conveyed can be increased. Therefore, the core yarn 11 having a modified cross-sectional structure can increase the water absorption amount of the entire towel 10 and improve the quick-drying property as compared with the core yarn having a circular cross-sectional structure.

FIG. 3 shows a cross-sectional view of the core yarn 11 along line AA in FIG.
The core thread 11 has a cross-shaped cross-sectional shape. The cross shape is preferable from the viewpoint of improving the quick-drying property because it is easy to form gaps between the portions extending in the left, right, up and down directions.

In the core thread 11 of this embodiment, the tip of the cross is further branched to the left and right. This branched portion becomes a steric hindrance, and more voids are formed between adjacent core yarns 11 or between the core yarn 11 and the sheath yarn 12, so that the quick-drying property is more likely to be improved.

The modified cross-sectional structure of the core yarn 11 is not limited to the above-described cross shape, and other shapes can be adopted as long as the voids inside the pile yarn 1 can be increased.
FIGS. 4 and 5 show examples of

core yarns

11a and 11b having other modified cross-sectional structures, respectively.

The core thread 11a has a petal-like cross-sectional structure extending in five directions from the center. Since the core thread 11a has a cross-sectional structure in which voids are likely to be formed between the extending portions and a steric hindrance is likely to occur, the quick drying property is likely to be improved similarly to the cross-shaped core thread 11a, which is preferable.

The core yarn 11b has unevenness on its surface and has a C-shaped bent cross-sectional structure. It is preferable from the viewpoint of improving quick-drying because voids are likely to be formed in concave portions or curved interiors of unevenness.

The core yarn 11 is not limited to a modified cross-sectional structure, and may have a hollow structure as long as the voids in the pile yarn 1 can be increased compared to when the cross-sectional shape is circular.

FIG. 6 shows an example of a core yarn 11c having a hollow structure.
The core yarn 11c is a filament yarn provided with three holes penetrating in the length direction of the yarn.

The core yarn 11c with a hollow structure allows diffusion of moisture not only through the surface of the core yarn 11c but also through the internal pores. The internal pores tend to absorb moisture by capillary action. Therefore, the quick-drying property of the towel 10 is further improved.

Although the cross-sectional shape of the holes in the core thread 11c is circular, the cross-sectional shape of the holes is not limited to this, and may be a non-circular non-circular shape such as a triangle or a square.

In the core-sheath structure fiber, the fiber length of the natural fiber used for the sheath yarn 12, such as cotton, is about 30 mm, specifically 28 to 32 mm. Synthetic fibers, such as polyester filament yarn, used for the core yarn 11 are, for example, 75 denier (72 filaments) for the sheath yarn 12 of this fiber length.

If the fiber length of the sheath yarn 12 is too short, the amount of natural fibers will decrease, and the water absorption tends to decrease. On the other hand, if the fiber length is too long, the sheath yarn 12 will become thin, and the water absorption tends to decrease.

The present inventors examined the relationship between fiber length and water absorption, and found that if the fiber length is in the range of about 30 mm (28 to 32 mm), the fiber length is neither too long nor too short, and good water absorption can be achieved. There was found.

The core-sheath structure fiber may be a single yarn, but it is preferably a plied yarn in which two or more yarns are twisted, and more preferably a two-ply yarn in which two yarns are twisted together. Thereby, the natural fibers used for the pile yarn 1 can be increased, and the water absorbability of the towel 10 can be improved. Moreover, the strength of the pile yarn 1 can be increased.

The ratio of synthetic fibers in the towel 10 is 50% by mass or more. The towel 10, which has a large amount of synthetic fibers, easily diffuses and evaporates the absorbed moisture, and is excellent in quick-drying properties. The ratio of synthetic fibers can be adjusted to 50% by mass or more by using synthetic fibers for the ground threads or by using core-sheath structure fibers for all threads 1 to 3.

Even if the entire towel 10 contains a large amount of synthetic fibers, the surface of the

piles

1a and 1b, which are easy to touch with the skin, are made of natural fibers, so the towel 10 does not lose its good touch. Synthetic fibers are usually long fibers longer than natural fibers, and the towel 10 is less fluffed.

On the other hand, if the percentage of synthetic fibers that hardly absorb water is high, the percentage of natural fibers that absorb water is low, so the total water absorption of the towel 10 is reduced. Thus, there is a trade-off relationship between quick-drying property and water absorbency, and it is generally difficult to achieve both.

In this embodiment, by devising the type and ratio of the fibers used in the towel 10 and the structure of the pile yarn 1, both quick drying and water absorbency are achieved.

First, the quick-drying property of the towel 10 is improved by adjusting the amount of synthetic fibers with excellent moisture diffusion function to 50% by mass or more.

The quick-drying property is also improved by using a core-sheath structure fiber for the pile yarn 1 and using a synthetic fiber for the core yarn 11. By making the cross-sectional structure of this synthetic fiber irregular and increasing the voids inside the pile yarn 1, the quick-drying property can be further improved.

On the other hand, by using natural fibers for the sheath yarns 12 of the pile yarns 1, the decrease in water absorbency of the towel 10 due to the use of synthetic fibers is suppressed. In addition, by using a core-sheath structure fiber with a fiber length of about 30 mm for the towel 10, the water absorbency of the core-sheath structure fiber is enhanced as much as possible.

Thus, according to this embodiment, it is possible to provide the towel 10 that not only dries quickly but also has excellent water absorbency. Good dehydration after washing and easy to dry. The towel 10 has a good touch and can be used comfortably.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes are possible.
For example, the present invention is not limited to towels as long as it is a pile fabric. The present invention can also be applied to bedding such as handkerchiefs and towel blankets, and fabrics such as clothes.

(Comparative example 1)
A common specification towel was used as the towel of Comparative Example 1. The towel of Comparative Example 1 has pile on both sides, and cotton is used for all of the ground threads and pile threads. The fiber length of the cotton was about 35 mm and it was an extra-long fiber. The size of the towel was 20 cm x 20 cm.

(Example 1)
A towel having the same woven structure shown in FIG. Compared to Comparative Examples 1 and 2, the towel of Example 1 uses core-sheath structure fibers for the ground yarn and pile yarn, and the core yarn 11 is a polyester having a cross-shaped modified cross-sectional structure shown in FIG. It is different in that it is a filament yarn of Cotton is used for the sheath thread 12, and the fiber length of the cotton is about 30 mm. The size of the towel was 20 cm x 20 cm.

(Comparative example 2)
The same towel as in Comparative Example 1 was used as the towel in Comparative Example 2, except that the cotton fibers were short fibers having a fiber length of about 25 mm.

(evaluation)
The towels of Comparative Examples 1 and 2 and Example 1 were placed in a washing machine, 30 L of water was added and stirred, then rinsed once and dehydrated once. At this time, the mass (g) of the towel before water absorption, after rinsing, and after dehydration was measured. The difference between the weight after rinsing (w2) and the weight before water absorption (w1) was determined as the water absorption of the towel (w2-w1). Also, the difference between the weight after dehydration (w3) and the weight before water absorption (w1) was obtained as residual moisture in the towel (w3-w1). A dehydration rate (%) was obtained by subtracting the ratio of residual moisture to the obtained water absorption from 100%.

Next, the dehydrated towel was dried at room temperature, and the time required for drying was measured. The weight (g) of the towel after drying was measured, and the difference from the weight (w1) before water absorption was obtained as the amount (g) of fibers dropped by washing.

On the other hand, the towels of Comparative Examples 1, 2 and Example 1 were applied to a certain amount of water in a container, and the time required to absorb all the water was measured. Measurements were taken when the surface of the towel to be exposed to water was the front side and the back side.

Table 1 shows the measurement results. "1>" in the table indicates less than 1 second.

(Provided by Mr. Jun Xu, Technology Development Manager, Shanghai All-Ke Enterprise Development Co., Ltd.)

In the above measurement results, the water absorption amount and water absorption time are indices for evaluating the water absorption of the towel, and the dehydration rate and drying time are indices for evaluating quick drying. As can be seen from Table 1, Example 1 has the same or greater amount of water absorption than Comparative Examples 1 and 2, and the water absorption time is very short. On the other hand, since the dehydration rate of Example 1 was high and the drying time was short, it can be confirmed that both water absorption and quick drying are achieved. Example 1 has a small dropout amount and is excellent in wear resistance.

As described above, one of the characteristics of the towel 10 is that all of the pile yarns 1 and

ground yarns

2 and 3 used in the towel 10 have a core-sheath structure. Compared to known towels that employ core-sheath structure fibers only for pile yarns, the proportion of polyester in the entire towel can be dramatically increased.

In practice, the percentage of polyester in the towel 10 according to this embodiment is 50% by mass. In this case, quick-drying properties can be improved due to the material characteristics of polyester. Furthermore, the polyester according to the present embodiment is characterized by having a modified cross-sectional structure. As a result, contact surfaces between polyesters or between polyester and sheath yarn 12 are reduced as much as possible, and air flow is sufficiently ensured to improve air permeability and further improve quick-drying.

On the other hand, with regard to water absorbency, the present invention is characterized by stipulating an appropriate fiber length. There is a trade-off between water absorbency and quick-drying properties achieved through the extensive use of polyester. A certain amount of water absorption can be secured.

Specifically, the proper fiber length of the towel according to this embodiment is set to around 30 mm. If the fiber length is shorter than this (25 mm), the amount of water-absorbing fiber is insufficient in the first place. will run out. Therefore, by specifying an appropriate fiber length of around 30 mm, it is possible to ensure the amount of fibers that absorb water.

In addition to the quick-drying property and water absorbency mentioned above, the inventor's diligent research also yielded good results regarding water absorption speed, abrasion resistance, and dehydration property. Therefore, it can be said that the towel 10 according to the present embodiment is a towel with extremely well-balanced functionality.

This application claims priority based on Japanese Patent Application No. 2021-090969, which is a Japanese patent application filed on May 31, 2021, and all descriptions of the Japanese patent application are incorporated.

DESCRIPTION OF SYMBOLS 10... Towel, 1... Pile yarn, 1a, 1b... Pile, 11, 11a, 11b, 11c... Core yarn, 12... Sheath yarn, 2... Weft yarn, 3...・Warp

Claims

In fabrics with pile,
The pile is a core-sheath structure fiber composed of a core yarn and a sheath yarn,
The core yarn is a false-twisted yarn made of synthetic fibers, having a modified cross-sectional structure, and crimping properties,
The sheath yarn is made of natural fibers and has a fiber length of 28 to 32 mm,
The proportion of synthetic fibers in the woven fabric is 50 to 55% by mass,
a pile yarn that constitutes the pile;
and a ground thread into which the pile thread is woven,
A woven fabric, wherein the core-sheath structure fiber is used for the pile yarn and the base yarn.
The core-sheath structure fiber is
The woven fabric according to claim 1, wherein the sheath yarn is wound around the bundled core yarns.
The woven fabric according to claim 1 or 2, wherein the pile is a plied yarn obtained by twisting the core-sheath structure fibers.
The fabric according to any one of claims 1 to 3, wherein the pile is a 3-pick pile.
The synthetic fiber used for the core yarn is a polyester filament yarn,
The fabric according to any one of claims 1 to 5, wherein the natural fiber used for the sheath yarn is cotton.