JP7080380B1 - fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve both water absorption and quick-drying property of a woven fabric.
SOLUTION: In a woven fabric (10) having a pile (1a, 1b), the pile (1a, 1b) is a core-sheath structure fiber composed of a core yarn (11) and a sheath yarn (12). The core yarn (11) is a false twisted yarn made of synthetic fibers, having an irregular cross-sectional structure or a hollow structure, and having a crimping property. The sheath yarn (12) is made of natural fiber and has a fiber length of 28 to 32 mm. The woven fabric (10) is characterized in that the proportion of synthetic fibers in the woven fabric (10) composed of the core yarn (11) and the sheath yarn (12) is 50% by mass or more.
[Selection diagram] Fig. 2

Description

The present invention relates to woven fabrics.

The pile woven fabric, in which pile yarn is woven into the ground yarn, has high water absorption and is 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.

Cotton, which is soft to the touch and has high water absorption, is often used as the ground yarn and pile yarn. In addition, pile yarn obtained by twisting synthetic fibers with natural fibers such as cotton may be used (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2005-52021

Natural fibers such as cotton are short fibers that easily absorb water, but are also prone to fluffing. Natural fibers also dry slower than synthetic fibers such as polyester. Synthetic fibers, on the other hand, dry quickly, but the fibers themselves do not absorb water, thus reducing the water absorption of the entire woven fabric.

An object of the present invention is to achieve both water absorption and quick-drying property of a woven fabric.

One aspect of the present invention is a woven fabric (10) having a pile (1a, 1b), in which the pile (1a, 1b) is a core-sheath structure fiber composed of a core yarn (11) and a sheath yarn (12). The core yarn (11) is a false twisted yarn made of synthetic fibers, having an irregular cross-sectional structure or a hollow structure, and having crimpability. The sheath yarn (12) is made of natural fiber and has a fiber length of 28 to 32 mm. The ratio of synthetic fibers in the woven fabric (10) composed of the core yarn (11) and the sheath yarn (12) is 50% by mass or more.

According to the present invention, both water absorption and quick-drying property of the woven fabric can be achieved.

It is a perspective view which shows the woven structure of the woven fabric of this embodiment. It is an enlarged view of a pile yarn. It is sectional drawing of the core thread in line AA in FIG. It is sectional drawing of the core thread which shows the other example of the irregular cross-sectional structure. It is sectional drawing of the core thread which shows the other example of the irregular cross-sectional structure. It is sectional drawing of the core thread which shows the other example of the irregular 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 (typical example) of the present invention, and the present invention is not limited thereto.

FIG. 1 shows a woven structure of a towel 10 according to an embodiment of the present invention.
The towel 10 is a pile woven fabric, and the pile yarn 1 is woven into the weft yarn 2 and the warp yarn 3. The weft 2 and the warp 3 are called ground yarns.

The pile yarn 1 is woven so as to form a loop. The towel 10 has a pile 1a, which is a loop protruding toward one surface side, and a pile 1b, which is a loop projecting toward the other surface side.

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

The piles 1a and 1b of the present embodiment are 3-pick type piles. Therefore, piles 1a and 1b having a soft texture can be formed. In the three-pick method, the two weft yarns 2 and the pile yarn 1 are woven in this order so that one pile is formed for each of the three warp yarns 3.

Core-sheath structural fibers are used for the piles 1a and 1b. The core-sheath structure fiber has a structure in which the circumference of the core yarn is covered with the sheath yarn. The weft 2 and the warp 3 may be synthetic fibers or natural fibers, respectively, but it is particularly preferable that these 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 having excellent quick-drying property and water absorption.

FIG. 2 shows an example of the core sheath structure of the pile yarn 1. When the core-sheath structure fiber is also 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 the present 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 soft natural fibers for the sheath yarns 12 on the surface layers of the piles 1a and 1b, a towel 10 that is soft to the touch can be provided.

In addition, the natural fiber having excellent water absorption can quickly absorb a large amount of water adhering to the towel 10. The absorbed water is diffused along the surface of the synthetic fiber inside the natural fiber, so that the water absorption time is short. Since the water does not stay and easily evaporates due to diffusion, the quick-drying property of the towel 10 can be improved.

Examples of the synthetic fiber that can be used for the core yarn 11 include polyester, nylon, acrylic and the like. Among them, from the viewpoint of quick-drying, the synthetic fiber used for the core yarn 11 is preferably a polyester filament yarn.

Examples of the natural fiber that can be used for the sheath yarn 12 include cotton, silk, hemp and the like. Of these, cotton is preferable because it is soft to the touch and has high water absorption.

The core yarn 11 is a filament yarn having a modified cross-sectional structure. The core yarn 11 is a false twisted yarn having a crimping property. The modified cross-sectional structure refers to a structure having a shape in which the cross section is not circular when cut in a direction orthogonal to the length direction of the thread.

When a plurality of core yarns 11 are bundled, a gap is formed between adjacent core yarns 11 or between the core yarns 11 and the sheath yarn 12. Since the voids extend along the length direction of the core yarn 11, the water absorbed by the sheath yarn 12 is diffused throughout the towel 10 through the voids. Further, the air permeability inside the pile yarn 1 is enhanced by the voids. Therefore, the quick-drying property of the towel 10 becomes very high.

The core thread 11 having a modified cross-section structure forms more voids than when the cross section is circular. Further, since the core yarn 11 becomes bulky due to crimping, the void region tends to expand, and the amount of water to be carried can be increased. Therefore, the core thread 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 thread having a circular cross-sectional structure.

FIG. 3 shows a cross-sectional view of the core yarn 11 in the line AA of FIG.
The core thread 11 has a cross-shaped cross section. The cross shape is preferable from the viewpoint of improving quick-drying property because a gap is easily formed between the portions extending from side to side and up and down.

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

The irregular cross-sectional structure of the core yarn 11 is not limited to the above cross shape, and other shapes can be adopted as long as the voids inside the pile yarn 1 can be increased.
4 and 5 show examples of core yarns 11a and 11b having other irregular cross-sectional structures, respectively.

The core thread 11a has a petal-like cross-sectional structure extending from the center in five directions. Since the core yarn 11a has a cross-sectional structure in which voids are likely to be formed between the extending portions and three-dimensional obstacles are likely to occur, the quick-drying property is likely to be improved as in the cross shape, which is preferable.

The core thread 11b has an uneven surface and has a cross-sectional structure bent in a C shape. Voids are likely to be formed in the concave and convex recesses or the bent interior, which is preferable from the viewpoint of improving quick-drying.

If the voids in the pile yarn 1 can be increased as compared with the case where the cross-sectional shape is circular, the core yarn 11 is not limited to the irregular cross-sectional structure, and may be a hollow structure.

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 that penetrate in the length direction of the yarn.

The hollow core thread 11c is capable of diffusing water not only through the surface of the core thread 11c but also through the internal holes. The internal holes easily absorb water due to capillarity. Therefore, the quick-drying property of the towel 10 is further improved.

The cross-sectional shape of the hole of the core thread 11c is circular, but the cross-sectional shape of the hole is not limited to this, and may be a non-circular irregular shape such as a triangle or a quadrangle.

In the core-sheath structure fiber, the fiber length of the natural fiber used for the sheath yarn 12, for example, cotton, is about 30 mm, specifically 28 to 32 mm. The synthetic fiber used for the core yarn 11, for example, polyester filament yarn, is, for example, 75 denier (72 filaments) with respect to the sheath yarn 12 having this fiber length.

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

As a result of the study of the relationship between the fiber length and the water absorption, if the fiber length range is around 30 mm (28 to 32 mm), the fiber length is not too long and not too short, and good water absorption can be realized. There was found.

The core-sheath structure fiber may be a single yarn, but is preferably a twisted yarn in which two or more yarns are twisted, and more preferably a twin yarn in which two yarns are twisted together. As a result, the amount of natural fibers used for the pile yarn 1 can be increased, and the water absorption of the towel 10 can be enhanced. Further, the strength of the pile yarn 1 can be increased.

The proportion of synthetic fibers in the towel 10 is 50% by mass or more. As described above, the towel 10 having a large amount of synthetic fibers is easy to diffuse and evaporate the absorbed water, and is excellent in quick-drying property. The ratio of the synthetic fiber can be adjusted to 50% by mass or more by using the synthetic fiber for the ground yarn or using the core-sheath structure fiber for all the yarns 1 to 3.

Even if the total amount of synthetic fibers in the towel 10 is large, the surfaces of the piles 1a and 1b that are easily in contact with the skin are natural fibers, so that the softness of the towel 10 is not impaired. Usually, the synthetic fiber is a long fiber having a longer fiber length than the natural fiber, and the towel 10 has less fluffing.

On the other hand, if the proportion of synthetic fibers that hardly absorb water is large due to the material, the proportion of natural fibers having good water absorption decreases, so that the amount of water absorption of the entire towel 10 decreases. As described above, there is a trade-off relationship between quick-drying and water absorption, and it is generally difficult to achieve both.

In the present embodiment, the type and ratio of the fibers used in the towel 10 and the structure of the pile yarn 1 are creatively devised to realize both quick-drying and water absorption.

First, the quick-drying property of the towel 10 is improved by adjusting the amount of synthetic fiber used, which has an excellent water diffusion function, to a ratio of 50% by mass or more.

The quick-drying property is also improved by using the core-sheath structure fiber for the pile yarn 1 and the synthetic fiber for the core yarn 11. By making the cross-sectional structure of the 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 yarn 12 of the pile yarn 1, the decrease in water absorption of the towel 10 due to the use of synthetic fibers is suppressed. Further, by using the core-sheath structure fiber having a fiber length of about 30 mm for the towel 10, the water absorption of the core-sheath structure fiber is enhanced as much as possible.

As described above, according to the present embodiment, it is possible to provide the towel 10 which is excellent not only in quick-drying but also in water absorption. It has good dehydration after washing and is easy to dry. The towel 10 is soft to the touch, and the towel 10 can be used comfortably.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments and can be modified and modified in various ways.
For example, in the case of a pile woven fabric, the present invention is not limited to towels. The present invention can also be applied to bedding such as handkerchiefs and towelettes, and woven fabrics such as clothes.

(Comparative Example 1)
A towel with general specifications was used as the towel of Comparative Example 1. The towel of Comparative Example 1 has piles on both sides, and cotton is used for all the ground yarns and pile yarns. The fiber length of cotton was an ultra-long fiber of about 35 mm. The size of the towel was 20 cm x 20 cm.

(Example 1)
A towel having the same woven structure as that shown in FIG. 1 as the towel 10 described above was used as the towel of Example 1. Compared with Comparative Examples 1 and 2, the towel of Example 1 employs core-sheath structure fibers for the ground yarn and pile yarn, and the core yarn 11 is a polyester having a cross-shaped irregular cross-sectional structure shown in FIG. It differs in that it is a filament yarn of. Further, cotton is used for the sheath yarn 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 had a short fiber length of about 25 mm.

(evaluation)
The towels of Comparative Examples 1 and 2 and Example 1 were put into a washing machine, 30 L of water was put into the washing machine, and the mixture was stirred, and 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 mass after rinsing (w2) and the mass before water absorption (w1) was determined as the water absorption amount (w2-w1) of the towel. Further, the difference between the mass after dehydration (w3) and the mass before water absorption (w1) was determined as the residual water content (w3-w1) in the towel. The value obtained by subtracting the ratio of the residual water content to the obtained water absorption amount from 100% was determined as the dehydration rate (%).

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

On the other hand, the towels of Comparative Examples 1 and 2 and Example 1 were applied from above a certain amount of water surface stretched on the container, and the time required to absorb all the water was measured. The measurement was performed when the surface of the towel exposed to water was on the front side and when it was on the back side.

（上海全科企業発展有限会社 技術開発マネージャー 徐 俊様 ご提供） Table 1 shows the measurement results. "1>" in the table indicates that it is less than 1 second.

(Provided by Mr. Xu Shun, Technology Development Manager, Shanghai All-Department Corporate Development Co., Ltd.)

In the above measurement results, the water absorption amount and the water absorption time are indexes for evaluating the water absorption of the towel, and the dehydration rate and the drying time are indexes for evaluating the quick-drying property. As can be seen from Table 1, the water absorption amount of Example 1 is the same as or larger than that of Comparative Examples 1 and 2, and the water absorption time is very short. On the other hand, since the dehydration rate of Example 1 is high and the drying time is short, it can be confirmed that both water absorption and quick-drying are achieved. In the first embodiment, the amount of falling off is small and the wear resistance is excellent.

As described above, one of the features of the towel 10 is that the core-sheath structure is adopted for all the pile yarns 1 and the ground yarns 2 and 3 used in the towel 10. Compared with a known towel that uses core-sheath structural fibers only for pile yarn, the proportion of polyester in the entire towel can be dramatically increased.

In practice, the proportion of polyester in the towel 10 according to the present embodiment is 50% by mass. In this case, quick-drying can be improved due to the material characteristics of polyester. Further, the polyester according to the present embodiment is characterized in that it has a modified cross-sectional structure. As a result, the contact surface between the polyesters or between the polyester and the sheath yarn 12 is reduced as much as possible, and the air flow is sufficiently secured to improve the air permeability and further improve the quick-drying property.

On the other hand, with respect to water absorption, the present invention is characterized in that an appropriate fiber length is specified. Water absorption has a trade-off relationship with quick-drying realized by using a lot of polyester, but by specifying the appropriate fiber length of cotton, it is the same as a general towel that emphasizes water absorption and does not adopt a core sheath structure. It is possible to secure a certain amount of water absorption.

Specifically, the appropriate fiber length of the towel according to this embodiment is defined to be around 30 mm. If it is shorter than this fiber length (25 mm), the amount of water-absorbing fiber is insufficient in the first place, while if it is longer than this (35 mm), the fiber becomes elongated in the spinning process, so the amount of water-absorbing fiber is also the same. Will run out. Therefore, by specifying an appropriate fiber length of about 30 mm, the amount of water-absorbing fiber can be secured.

In addition to the above-mentioned quick-drying property and water absorption, good results could be obtained by the inventor's diligent research on water absorption rate, wear resistance and dehydration property. Therefore, it can be said that the towel 10 in the present embodiment is an extremely well-balanced towel in terms of functionality.

10 ... Towel, 1 ... Pile thread, 1a, 1b ... Pile, 11, 11a, 11b, 11c ... Core thread, 12 ... Sheath thread, 2 ... Weft thread, 3 ...・ Warp and weft

Claims (5)

In the woven fabric (10) having piles (1a, 1b),
The pile (1a, 1b) is
It is a core-sheath structure fiber composed of a core yarn (11) and a sheath yarn (12).
The core thread (11) is
It is a false twisted yarn made of synthetic fibers, having an irregular cross-sectional structure, and having crimpability.
The sheath thread (12) is
It is made of natural fibers and has a fiber length of 28-32 mm.
The proportion of synthetic fibers in the woven fabric (10) is 50 to 55 % by mass .
The pile yarn (1) constituting the pile (1a, 1b) and
It is provided with a ground yarn (2, 3) into which the pile yarn (1) is woven.
The core-sheath structure fiber is used for the pile yarn (1) and the ground yarn (2, 3).
A woven fabric (10) characterized by this. The core-sheath structure fiber is
The woven fabric (10) according to claim 1, wherein the sheath yarn (12) is wound around the plurality of bundled core yarns (11). The woven fabric (10) according to claim 1 or 2, wherein the pile (1a, 1b) is a twisted yarn in which the core-sheath structure fiber is twisted. The woven fabric (10) according to any one of claims 1 to 3, wherein the pile (1a, 1b) is a 3-pick type pile. The synthetic fiber used for the core yarn (11) is a polyester filament yarn, and is
The woven fabric (10) according to any one of claims 1 to 5, wherein the natural fiber used for the sheath yarn (12) is cotton.

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