JP3301507B2 - Spun yarn excellent in quick drying - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention is used for clothing in general,
The present invention relates to a material which dries quickly after washing, and which has excellent drying properties after being used after being wetted with water, such as towels and fukin.

[0002]

2. Description of the Related Art Heretofore, there has been proposed a material which achieves both dryness, moisture absorption and water absorption by combining a hydrophobic fiber and a hydrophilic fiber. In particular, it is known that a yarn in which hydrophilic fibers are arranged in an outer layer portion and hydrophobic fibers are arranged in an inner layer portion has not only a high diffusibility of water but also an excellent texture. In addition, for heavy-weight woven fabrics and knitted fabrics in which drying properties are often a problem, many materials have been proposed by mixing or knitting hydrophobic fibers and hydrophilic fibers.

[0003]

However, yarns having hydrophilic fibers in the outer layer and hydrophobic fibers in the inner layer not only have the desired effect only when used in thin fabrics, Even when weaving or knitting of hydrophobic and hydrophilic fibers in a thick fabric or knit, water is diffused throughout the fabric by the hydrophobic fibers, but since the hydrophobic fibers do not repel water, There is a problem that water is retained and hinders drying, and as a result, satisfactory drying properties cannot be obtained.

Many studies have been made on the drying mechanism of fabrics, but they have not been completely elucidated. However, it has been empirically known that the drying property when completely immersed in water such as washing is related to the material and the basis weight. Drying is a phenomenon in which moisture evaporates from the cloth surface and diffuses inside the cloth at the same time.When the moisture content is large, evaporation from the surface continues at the maximum value, so the drying speed is constant, but the moisture content is small. When it becomes, internal diffusion becomes the rate-limiting and determines the drying rate. For this reason, in order to increase the drying speed, it is necessary to reduce the rate of internal diffusion and promote surface evaporation. However, in the above-mentioned conventional method, satisfactory drying properties cannot be obtained because these points are not focused on.

[0005]

Means for Solving the Problems In order to solve such problems, the present inventors have conducted intensive studies on a yarn structure having excellent water-absorbing properties and quick drying properties.
The present invention has been reached. That is, in the present invention, the ratio (weight%) of the hydrophilic fiber to the hydrophobic fiber is 40 to 90:60 in the yarn in which the outer layer portion is mainly composed of the hydrophilic fiber and the inner layer portion is mainly composed of the hydrophobic fiber. -10, the ratio of the hydrophilic fibers occupying 80% by weight or more on the surface of the yarn, and that a water repellent is applied to at least the hydrophobic fibers of the surface layer of the inner layer hydrophobic fibers. 2. The spun yarn according to claim 1, wherein the spun yarn is characterized by being excellent in quick-drying property, and being provided with 0.2 to 5% by weight of a water repellent to the hydrophobic fiber in the inner layer. Spun yarn.

Hereinafter, the present invention will be described in detail. In order to reduce the rate of internal diffusion and to promote surface evaporation, the present inventors disperse and distribute water as much as possible on the surface of the yarn without entering the inside of the cloth or the yarn. I thought it was necessary. For this purpose, the outer layer portion is mainly composed of hydrophilic fibers, and the inner layer portion is mainly composed of water-repellent fibers, and the yarn structure in which the water-repellent fibers are almost covered with the hydrophilic fibers is best. If the inner layer is hydrophobic, water is retained between the fibers in order to diffuse the water on the fiber surface, even if the inner layer hardly absorbs water. Water is repelled by the inner layer portion being water-repellent fibers, and remains in the hydrophilic fibers of the outer layer portion. However, since the hydrophilic fibers are present at 80% by weight or more, preferably 90% by weight or more on the surface of the yarn. Water is dispersed in the layer of hydrophilic fibers. Since water is dispersed and distributed on the surface rather than inside, the rate of internal diffusion is reduced and the degree of influence on the drying speed is reduced. Instead, surface evaporation is accelerated, but surface evaporation continues at a maximum unless internal diffusion is rate-limiting, resulting in shorter drying times.

[0007] 80% by weight of hydrophilic fibers on the surface of the yarn
As described above, when the content is preferably 90% by weight or more, the hydrophilic fibers almost cover the water-repellent fibers. If the proportion of the hydrophilic fiber on the surface of the yarn is less than 80% by weight, the water-repellent component is exposed to the outer layer and hinders water absorption. Therefore, the hydrophilic fiber on the surface of the yarn to maintain the conventional water absorption rate. Is preferably 80% by weight or more. The weight% is calculated by taking a photograph in which the cross section of the yarn is magnified 40 times, and calculating the number by weight.

Next, a water repellent is applied to at least the hydrophobic fibers in the surface layer of the hydrophobic fibers in the inner layer portion, thereby promoting surface evaporation. The thickness of the hydrophobic fiber is 1d or less, preferably 0.8d to promote such an effect.
The following is good.

As the water repellent (C) in the present invention, those obtained by dissolving, dispersing or emulsifying a generally used fluorine-based or silicon-based compound in water or a solvent can be used. Among these, fluorine-based water repellents are desirable from the viewpoint of oil repellency. As the fluorine-based water repellent, a perfluoroalkyl group-containing compound having a reactive group is preferable.

It is preferable that the water repellent is attached in a solid content of 0.2 to 5% by weight. If it is less than 0.2% by weight, the water-repellent effect is poor, while if it exceeds 5% by weight, the fibers in the outer layer are adversely affected, which is not preferable.

The hydrophilic fibers referred to herein are JIS L1
The fibers having an official moisture content of more than 5% as defined in 018 include, for example, natural fibers such as cotton and hemp, and regenerated fibers such as rayon and cupra. The hydrophobic fiber referred to herein is a fiber having an official moisture regain of 5% or less specified in JIS L1018, and specific examples thereof include polyester, nylon, and acryl. It may be.

In order to obtain the yarn of the present invention, hydrophobic fibers which have been subjected to a water-repellent treatment may be combined with hydrophilic fibers in the roving and spinning steps, or they may be combined in advance in the roving and spinning steps. And water-repellent performance may be imparted only to hydrophobic fibers in the state of yarn or woven or knitted fabric. You may make it give hydrophilic property mainly to the outer layer part of a yarn. In order to arrange mainly hydrophilic fibers in the outer layer portion and mainly hydrophobic fibers in the inner layer portion of the yarn, it is necessary to use a sea core in the roving and spinning processes, or to combine hydrophilic fibers and hydrophobic fibers in the inner layer portion. There is a method of mixing fibers.

The ratio of the hydrophilic fiber to the hydrophobic fiber is 40 to 9
0/60 to 10% by weight, preferably 50 to 80/50 to
20% by weight is good. When the amount of the hydrophilic fiber is less than 40%, not only the absolute water absorption is reduced, but also the hydrophobic fiber easily comes out to the surface of the yarn, thereby preventing water absorption. When the amount of the hydrophobic fiber is less than 10%, the thickness of the outer layer portion composed of the hydrophilic fiber in the cross section of the yarn increases, and the degree of internal diffusion affecting the drying speed increases. When a woven or knitted fabric is made with the yarn of the present invention, the whole of the woven or knitted fabric may use the yarn of the present invention, or a part of the woven or knitted fabric may use the yarn of the present invention.

[0014]

EXAMPLES The drying properties in the examples were measured as follows. After measuring the absolute dry mass of the sample cut to 4 cm x 5 cm, immerse it in pure water at 20 ° C for 2 hours, remove excess liquid water with filter paper, attach it to a dry heat time measuring device, and in a standard condition test chamber. The time until natural drying was measured. The water absorption was measured by JIS L1018 wicking method. Examples 1 and 2 and Comparative Examples 1 and 2 As Example 1, a polyester multifilament which was subjected to a water-repellent treatment under the following conditions using American cotton as the hydrophilic fiber and 50 d of polyester multifilament as the hydrophobic fiber was used. The core yarn was fed to a spinning machine together with a roving of 100% U.S. cotton to obtain a core yarn of 30'S. A sheet of knitted fabric was knitted using the core yarn.

In Example 2, when the above-mentioned water-repellent polyester multifilament is supplied to a spinning machine, it is controlled so that the polyester multifilament is mainly disposed in the inner layer portion, and is electrospread to form a 100% American cotton roving. 30'S combined
And knitted in the same manner.

As Comparative Example 1, an unprocessed polyester multifilament was used in place of the water-repellent polyester multifilament.

As Comparative Example 2, a spun yarn using American cotton of 100% hydrophilic fiber was obtained and knitted to fabric. After soaping was performed at 90 ° C. for 20 minutes in both Examples 1 and 2 and Comparative Examples 1 and 2, the drying time and the water absorption were evaluated by the above-described method, and the results are shown in Table 1. The prescription of the polyester water repellent treatment is as follows: a fluorine-based water repellent (LS-317, manufactured by Meisei Chemical Co., Ltd.) is mixed with an oil agent to give 0.5% by weight to the fiber weight.
The heat treatment is performed at 0 ° C. for 30 minutes.

[0018]

[Table 1]

In Example 1, the drying time is short because the hydrophobic fibers subjected to the water-repellent treatment are arranged in the inner layer of the core yarn. In Example 2, the ratio of the hydrophilic fibers to the yarn surface is slightly lower. Therefore, the drying time is slightly longer. On the other hand, Comparative Example 1 uses a non-water-repellent multifilament yarn as a core.
The drying time is longer than that of No. 2.

[0020]

According to the yarn of the present invention, water is repelled by the water-repellent fiber while maintaining the conventional water absorbency because the outer layer is mainly composed of the hydrophilic fiber and the inner layer is mainly composed of the water-repellent fiber. Since the fibers are not penetrated to the inside of the thread but are dispersed in the hydrophilic fibers, the rate of internal diffusion is reduced, and the surface evaporation is promoted, resulting in a shorter drying time. Therefore, when the yarn of the present invention is used, it is possible to obtain a woven or knitted fabric having excellent drying properties when completely immersed in water, for example, when used in washing or leaking into water.

Continuation of the front page (56) References JP-A-60-215829 (JP, A) JP-A-61-239035 (JP, A) JP-A-5-33234 (JP, A) JP-A-61-79430 (JP) JP-A-4-272247 (JP, A) JP-A-4-343770 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D02G 3/00-3/36

Claims (2)

(57) [Claims] 1. A yarn comprising mainly hydrophilic fibers in an outer layer portion and mainly hydrophobic fibers in an inner layer portion,
The ratio (% by weight) of the hydrophilic fiber and the hydrophobic fiber is 40 to
90:60 to 10; the ratio of the hydrophilic fibers occupying 80% by weight or more on the surface of the yarn; and a water repellent is applied to at least the hydrophobic fibers of the surface layer of the inner layer hydrophobic fibers. Spun yarn with excellent quick drying characteristics. 2. The method according to claim 1, wherein the amount of the hydrophobic fiber in the inner layer is 0.2 to 5%.
2. The spun yarn according to claim 1, wherein the spun yarn is provided with a water repellent in an amount of% by weight.