JP2022125927A - Spun yarn, fabric using the spun yarn, processed fabric, and method of producing processed fabric - Google Patents

Abstract

To provide a spun yarn capable of constituting a fabric capable of maintaining heat generation and insulation properties for a long time, and excellent in amenity, a fabric by the spun yarn, a processed fabric, and a method pf producing a processed fabric.SOLUTION: A spun yarn spun so as to be used as a processed fabric obtained by post-processing a fabric is obtained by mix-spinning a hydrophobic moisture absorption desorption moisture absorption heat generating fiber obtained by applying a hydrophobizing agent to a moisture absorption desorption moisture absorption heat generating fiber obtained by modifying an acrylic fiber or an acryl-based fiber, a soluble fiber, and a polyester fiber, where cavities can be formed after removing the soluble fiber by dissolving and removing the soluble fiber by post-processing the fabric.SELECTED DRAWING: Figure 7

Description

TECHNICAL FIELD The present invention relates to a spun yarn that is excellent in hydrophobicity and capable of forming a fabric that retains moisture absorption and heat generation, a fabric using the spun yarn, a processed fabric, and a method for producing a processed fabric.

In general, there is known a moisture-absorbing and desorbing moisture-absorbing heat-generating fiber that generates heat when it absorbs moisture, generates heat when it absorbs moisture again after moisture-dissipating and drying, and can repeat this process repeatedly (see, for example, Patent Document 1). . This moisture-absorbing and desorbing moisture-absorbing heat-generating fiber can improve heat retention by generating heat when absorbing moisture, so it is used in textile products such as winter clothes.

In clothing, etc., using such moisture-absorbing, moisture-absorbing, heat-generating fibers, it is important to maintain heat generation due to moisture absorption in order to increase heat retention due to heat generation. It is important to release moisture to the outside of the clothes while generating heat, and to keep the balance between moisture absorption and moisture release (dynamic equilibrium state) for a long time (see Non-Patent Documents 1 to 3).

Therefore, conventionally, by binding a hydrophobizing agent to the highly crosslinked polyacrylate fiber, even if it comes in contact with the liquid phase water, it repels water and adsorbs only the gas phase water to generate heat. A hydrophobized hygroscopic heat-generating fiber has been proposed that is capable of maintaining heat-generating and heat-retaining properties by maintaining a dynamic equilibrium state for a long time (see, for example, Patent Document 2).

Japanese Patent Publication No. 7-59762 Japanese Patent No. 5721746

Takeshi Ogino, Hiroshi Tanaka, Journal of the Society of Fiber Science and Technology, Vol.70-7, 160-166 (2014) "Visualization and Numerical Analysis of Water Vapor and Heat Transfer in Moisture-absorbing and Desorbing Fiber Materials Using Infrared Thermal Images" Takeshi Ogino, Hiroshi Tanaka, Journal of the Thermophysical Society of Japan, Vol.28-2, 89-93 (2014) “Numerical Analysis of Water Vapor and Heat Transfer in Moisture Absorption/Desorption Fiber Materials“ Takeshi Ogino, Hiroshi Tanaka et al., Journal of the Society of Fiber Science and Technology, Vol.71-3, 134-140 (2015) “Analysis of heat quantity change and generation mechanism associated with water vapor adsorption/desorption of moisture absorbing/desorbing fiber materials”

However, in the case of the conventional hydrophobized hygroscopic heat-generating fiber, since the hydrophobizing agent is only bound to the highly crosslinked polyacrylate fiber, even if the yarn is made from the fiber and the fabric is made from the yarn, the clothes made of the fabric , the hydrophobized surface may come into direct contact with the skin. Therefore, there is concern that wetness due to sweat or water will remain between the skin surface and the fabric, resulting in a decrease in comfort. In addition, although it is made hydrophobic, it has had the inconvenience of being difficult to maintain its heat-generating and heat-retaining properties due to a decrease in its ability to absorb moisture and generate heat when worn due to the above-mentioned wetting with sweat and moisture.

The present invention has been made in view of such circumstances, and is a spun yarn that can maintain heat and heat retention for a long time and can constitute a textured fabric with excellent comfort, and the spun yarn. The object is to provide a fabric, a processed fabric, and a method for producing a processed fabric using

The spun yarn of the present invention for solving the above problems is a spun yarn that is used as a processed fabric by processing after forming a fabric, and is an absorbent made by modifying acrylic fiber or acrylic fiber. Hydrophobic moisture-absorbing moisture-absorbing heat-generating fibers obtained by applying a hydrophobizing agent to moisture-absorbing moisture-absorbing heat-generating fibers, dissolving fibers, and hydrophobic fibers are blended, and the dissolving fibers are dissolved by post-processing the fabric. By removing the dissolving fibers with a squeegee, voids can be formed in the traces where the dissolved fibers have been removed.

The spun yarn may be one in which dissolved fibers are concentrated in the center so that the center can be formed sparsely.

The spun yarn may be one in which the hydrophobic fibers are concentrated in the outer peripheral edge so that the outer peripheral edge can be densely formed.

The spun yarn may be one in which the hydrophobic moisture-absorbing/desorbing moisture-absorbing heat-generating fibers and the hydrophobic fibers are concentrated in the peripheral edge so that the peripheral edge can be densely formed.

The above-mentioned spun yarn concentrates dissolved fibers in the center, concentrates hydrophobic fibers or hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fibers and hydrophobic fibers in the outer periphery, and dissolves fibers and hydrophobic fibers in the middle between the center and the outer periphery. It is also possible to concentrate the hygroscopic and desorbable heat-generating fibers and the hydrophobic fibers so that they are sparse in the center and denser toward the outer edge.

The spun yarn may contain dissolved fibers in an amount of 5 to 60% by mass.

The above spun yarn is the weight of the absolute dry processed fabric that is knitted in tengu, and the weight of the absolute dry processed fabric is left for 90 minutes in a windless environment at 25 ° C. and 95% RH. Moisture absorption capacity calculated by subtracting the weight change rate when the processed fabric in the absolute dry state is floated in a water tank containing water at 23 ° C for 90 minutes under the environmental conditions of 25 ° C and 60% RH from the weight change rate. A rate of 1.5% or more may be used.

For the spun yarn, the weight change rate when the tenjiku knitted processed fabric in an absolutely dry state is floated in a water tank containing water at 23 ° C for 90 minutes under environmental conditions of 25 ° C. and 60% RH is calculated. The ratio obtained by dividing the absolute dry processed fabric by the weight change rate when left for 90 minutes under windless environment conditions of 25° C. and 95% RH may be 0.9 or less.

The above spun yarn has a surface temperature of 20 ° C when the processed fabric in an absolute dry state that has been knitted in tengu is floated in a water tank containing 15 ° C water in an atmosphere of 20 ° C and 65% RH. The above conditions may be maintained for 10 minutes or more, and the temperature drop after 10 minutes from the temperature at the time of initial heat generation may be within 1°C.

The fabric of the present invention for solving the above problems is composed of the above spun yarn.

The processed fabric of the present invention for solving the above problems is obtained by dissolving and removing dissolved fibers contained in the fabric from the fabric composed of the spun yarn by post-processing, and after removing the dissolved fibers, A void is formed.

The method for producing a processed fabric according to the present invention for solving the above-mentioned problems is to form a fabric from the above-mentioned spun yarn, and then dissolve and remove the dissolved fibers by post-processing the fabric, thereby removing the dissolved fibers. A void is formed in the trace.

The acrylic fiber or the hygroscopic and heat-generating fiber obtained by modifying the acrylic fiber is a highly cross-linked polyacrylate fiber obtained by modifying the acrylic fiber or the acrylic fiber to introduce a large amount of hydrophilic groups and highly cross-linking it. can be used. Examples of such moisture-absorbing and desorbing moisture-absorbing heat-generating fibers include "Moiscare EX (trade name, manufactured by Toyobo Co., Ltd.)" and "Sunburner (trade name, manufactured by Toho Textile Co., Ltd.)".

The hydrophobic moisture-absorbing/desorbing moisture-absorbing heat-generating fibers are constructed by providing the above-mentioned moisture-absorbing/desorbing moisture-absorbing heat-generating fibers with a hydrophobizing agent. As a method for providing the hydrophobizing agent to the moisture absorbing/desorbing moisture heat generating fibers, it can be provided by adsorbing, bonding, or adhering the hydrophobic agent to the moisture absorbing/desorbing moisture absorbing heat generating fibers. For example, fluorine gas is brought into contact with the surface of the highly crosslinked polyacrylate fiber to bind fluorine. Alternatively, it is expressed by binding hydrophobizing agents including fluorine-containing compounds, silicone compounds, fluorine-containing silicone compounds or hydrocarbon compounds. A hydrophobizing agent is a compound that hydrophobizes a mating substance, and is, for example, a water repellent.

Since the moisture-absorbing/desorbing moisture-absorbing heat-generating fiber to which the hydrophobizing agent is provided has a hydrophilic functional group in its side chain, the hydrophobizing agent is preferably bound to these functional groups. This is because the hydrophobicity does not decrease even after repeated washing. Examples of fluorine-based hydrophobizing agents that can be used in the present invention include commercially available fluorine-based hydrophobizing agent emulsions “Asahi Guard GS10 (trade name, manufactured by Asahi Glass Co., Ltd.)” and “NK Guard FGN700T (trade name, manufactured by Nicca Chemical Co., Ltd.)”. There is "NK guard NDN7000 (manufactured by Nicca Chemical Co., Ltd.)" and the like. Examples of modified silicone hydrophobizing agents include epoxy-modified silicone hydrophobizing agents and cationic amino-modified silicone hydrophobizing agents. Shin-Etsu Silicone Co., Ltd. trade name)”, both end-type epoxy-modified silicone “X-22-163A (Shin-Etsu Silicone Co., Ltd. trade name)”, cationic double-end amino-modified silicone “KF-8012 (Shin-Etsu Silicone Co., Ltd. trade name) )”, etc. As cationic fluorine-containing silicone compounds, commercially available products include "NK Guard S-07 (manufactured by Nicca Chemical Co., Ltd.)" and "NK Guard S-09 (manufactured by Nicca Chemical Co., Ltd.)". As cationic fluorine compounds, commercially available products such as "AG-E061 (trade name manufactured by Asahi Glass Co., Ltd.)", "AG-E081 (trade name manufactured by Asahi Glass Co., Ltd.)", "AG-E092 (trade name manufactured by Asahi Glass Co., Ltd.)", " AG-E500D (trade name, manufactured by Asahi Glass Co., Ltd.)", and as a cationic hydrocarbon compound, there is a high-melting wax emulsion "TH-44 (trade name, manufactured by Nicca Chemical Co., Ltd.)".

Among these, at least one hydrophobizing agent selected from cationic fluorine-containing silicone compounds, cationic fluorine-containing compounds, cationic amino-modified silicone compounds and cationic hydrocarbon compounds is preferred. The reason for this is that the highly crosslinked polyacrylate fiber used in the present invention is a fiber having a salt-type carboxyl group, such as a —COONa group, as a hydrophilic group as described above, and if it is a cationic hydrophobizing agent, the salt-type carboxyl group This is because it is easy to adsorb and bond with ions. Cationic fluorine-containing silicone compounds are particularly preferred. Examples of cationic fluorine-containing silicone compounds include compounds containing cationic groups such as fluoroalkyl groups, silicone groups (organosilicon groups), and quaternary ammonium salts. Another example is an aqueous emulsion prepared by mixing a compound containing a fluoroalkyl group and a silicone group (organosilicon group) with a cationic surfactant.

These hydrophobizing agents are preferably attached to the fibers in a state of being dispersed in water. The fibers can be brought into contact by a method such as immersing the fibers in the treatment liquid, spraying the fibers, or padding, and then bonded and fixed by heat treatment using a cure set.

The bonding amount of the hydrophobizing agent is 0.2 to 2.5% by mass (mass% is also called omf%, omf is an abbreviation for on the mass of fiber) with respect to the fiber, preferably 0.22 to 2.5% by mass. 2.0 omf%. Within the above range, the fiber repels water even when it comes into contact with water in the liquid phase, absorbs water in the gas phase (vapor), maintains heat generation, has a good texture, and has a good ability to pass through the spinning process. . If the bonding amount of the hydrophobizing agent is less than 0.2% by mass, it is difficult to obtain desirable hydrophobicity, and if it exceeds 2.5% by mass, both the hand and the ability to pass through the spinning process are deteriorated.

The treatment with the hydrophobizing agent of the present invention is carried out in the fiber cotton state. The hydrophobic moisture-absorbing and desorbing moisture-absorbing and heat-generating fibers thus constructed can be blended with hydrophobic fibers, or hydrophobic fibers and dissolved fibers to form sliver. However, for example, fibers having a fiber length of about 25 to 70 mm and a denier of about 0.5 to 3 can be used.

The dissolvable fiber is not particularly limited as long as it is a fiber that can be dissolved in a post-processing step after spinning. For example, it can be dissolved by treating with water after spinning. Water-soluble vinylon fibers, dissolvable polyester fibers that can be dissolved by treatment with a solvent, and the like can be used. The dissolving fiber is limited in thickness and length as long as it can form a sliver by itself or by blending with hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fibers and hydrophobic fibers. For example, fibers having a fiber length of about 25 to 70 mm and a denier of about 0.5 to 3 can be used. As for the conditions for dissolving the dissolved fibers, the fibers may be simply washed with water or a solvent, or heated and pressurized accordingly. In addition, the work of dissolving and removing the dissolved fibers may be used in combination with or in combination with the washing process performed in the pre-treatment or post-treatment of a process such as dyeing of the fabric.

Hydrophobic fibers are used to ensure the strength of the spun yarn after dissolving the dissolved fibers in the post-treatment process after spinning, and to compensate for the lack of strength of the hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fibers. be. As the hydrophobic fiber, for example, the hydrophobic fiber may be used alone, mixed with hydrophobic moisture-absorbing, moisture-absorbing, heat-generating fibers, or mixed with hydrophobic moisture-absorbing, moisture-absorbing, heat-generating fibers and dissolving fibers to form a sliver. As long as it is possible, the thickness and length of the fibers are not limited, and for example, fibers having a fiber length of about 25 to 70 mm and a denier of about 0.5 to 3 can be used. Examples of hydrophobic fibers include polyester fibers, nylon fibers, triacetate fibers, acrylic fibers, acrylic fibers, polyurethane fibers, etc. One or more of these fibers may be used alone or in combination. may

Next, a method for manufacturing the spun yarn will be described.

First, the hydrophobic moisture-absorbing/desorbing moisture-absorbing heat-generating fiber, the dissolving fiber, and the hydrophobic fiber, which are raw materials, are weighed and mixed for each predetermined mass to form a wrap having a uniform width and thickness. This wrap is loosened by a carding machine, and each fiber is separated and aligned in parallel to be bundled into a string-like sliver.

At this time, a plurality of types of slivers are formed by changing the mixing ratio of the hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fibers, the dissolving fibers, and the hydrophobic fibers, which are raw materials. Depending on the sliver, two types of raw materials may be mixed, or sliver formed from only one type of raw material may be used.

Next, 6 to 8 slivers are stretched while being combined using a drawing machine, twisted to form a roving, further stretched and spun by adding twists, wound on a bobbin, The spun yarn is completed by rewinding it on a cheese or cone to form a cob yarn.

The spun yarn thus constructed is not particularly limited, and the thickness, length, etc. are particularly limited as long as it is a spun yarn that can be constructed by the sliver mix method described above. not something.

In addition, the mixing ratio of the hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fibers, the dissolved fibers, and the hydrophobic fibers, which constitute the spun yarn, is not particularly limited. Many voids are formed in the processed fabric formed after the processing step, and in some cases, it becomes difficult to ensure the strength of the processed fabric, so the dissolved fiber is preferably 5 to 60% by mass. . If it is less than 5% by mass, a sufficient void effect cannot be obtained, and if it exceeds 60% by mass, it becomes difficult to ensure the strength of the processed fabric. The hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fiber is preferably 5 to 50% by mass. If it is less than 5% by mass, a sufficient heat-generating and heat-retaining effect cannot be obtained, and if it exceeds 50% by mass, sufficient strength of the processed fabric cannot be ensured. The hydrophobic fiber is preferably 10 to 90% by mass. If it is less than 10% by mass, sufficient strength as a processed fabric cannot be ensured, and if it exceeds 90% by mass, a sufficient heat-generating and heat-retaining effect cannot be obtained.

Next, a method for manufacturing the processed cloth will be described.

First, fabric is constructed using the spun yarn. At this time, the structure of the fabric is not particularly limited, and may be a knitted fabric or a woven fabric. The fabric is a fabric such as a knitted fabric or a woven fabric made from the above-mentioned spun yarn, before dissolving the dissolved fibers by post-processing.

Next, the dissolved fibers contained in the spun yarn constituting the fabric were subjected to a dissolution process, and by dissolving and removing the portions where the dissolved fibers were present, voids were formed in the traces where the dissolved fibers were removed. Complete the processed dough.

After the spun yarn is produced in the processed fabric thus constructed, by dissolving and removing the dissolved fibers from the spun yarn, voids can be formed in the traces after the dissolved fibers have been removed. These voids act as voids that take in the heat generated by the hydrophobic moisture-absorbing, moisture-absorbing, heat-generating fibers, activating the moisture-absorbing and desorbing action. . Moreover, these voids make it difficult for the hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fibers to come into direct contact with moisture in the liquid phase. It becomes easy to maintain fever. Therefore, the heat-generating heat-retaining property can be maintained for a long time.

The use of the processed fabric thus constructed is not particularly limited, but since it can maintain heat and heat retention for a long time, it can be used for inner shirts, clothes, socks, gloves, hats, etc. It can be suitably used as textile tiles and products such as shoe upper materials, insole materials, and bedding.

As described above, according to the present invention, hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fibers, dissolving fibers, and hydrophobic fibers are blended, and the dissolving fibers are dissolved and removed by post-processing of the fabric. So, it is possible to construct a processed fabric with voids formed in the traces of the removal of the dissolved fibers, so not only the hydrophobic effect of the hydrophobic moisture-absorbing and desorbing heat-generating fibers, but also the voids formed in the processed fabric Water and sweat are easily repelled, and the hydrophobic effect against moisture in the liquid phase is improved. Moisture absorption and desorption of (steam) is activated, heat generation is more likely to occur, and heat generation and heat retention can be easily maintained. In addition, the processed fabric made of this spun yarn is not only hydrophobic moisture-absorbing and desorbing heat-generating fibers and hydrophobic fibers, but also voids are formed, so the texture of the processed fabric is improved and more comfortable. can be excellent.

(a) is a plan view illustrating the arrangement of each sliver when producing the spun yarn according to Example 1 of the present invention, (b) is a cross-sectional view of the spun yarn constituted by the sliver, and (c) is the same. FIG. 2 is a perspective view for explaining the state of spun yarn in a processed fabric composed of spun yarn. (a) is a plan view for explaining the arrangement of each sliver when producing the spun yarn according to Example 2 of the present invention, (b) is a cross-sectional view of the spun yarn constituted by the sliver, and (c) is the same. FIG. 2 is a perspective view for explaining the state of spun yarn in a processed fabric composed of spun yarn. (a) is a plan view illustrating the arrangement of each sliver when producing the spun yarn according to Example 3 of the present invention, (b) is a cross-sectional view of the spun yarn constituted by the sliver, and (c) is the same. FIG. 2 is a perspective view for explaining the state of spun yarn in a processed fabric composed of spun yarn. (a) is a plan view for explaining the arrangement of each sliver when producing the spun yarn according to Example 4 of the present invention, (b) is a cross-sectional view of the spun yarn constituted by the sliver, and (c) is the same. FIG. 2 is a perspective view for explaining the state of spun yarn in a processed fabric composed of spun yarn. 4 is a graph showing the change in weight before and after moisture absorption when the absolute dry processed fabric composed of each spun yarn is allowed to absorb moisture while floating on the surface of the water. 4 is a graph showing the weight change before and after moisture absorption when a absolutely dry processed fabric composed of each spun yarn is allowed to absorb moisture in a saturated humidity environment. 5 is a graph showing temperature changes on the surface of processed fabrics due to heat generated by moisture absorption when the processed fabrics in an absolutely dry state made up of spun yarns are allowed to absorb moisture while floating on the surface of the water.

[Example 1-4, Comparative Example 1-2]
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Preparation of sliver]
Hydrophobic, moisture-absorbing, heat-generating fibers with a single fiber fineness of 2.4 dtex and a fiber length of 35 mm, water-soluble vinylon fibers (dissolved fibers) with a single fiber fineness of 1.7 dtex and a fiber length of 38 mm, A polyester fiber (hydrophobic fiber) with a fiber length of 38 mm was prepared.

Among these, the hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fiber is a highly crosslinked polyacrylate fiber (manufactured by Nihon Exlan Kogyo Co., Ltd., trade name N-38) with a single fiber fineness of 2.4 dtex and a fiber length of 35 mm. (manufactured by Nicca Chemical Co., Ltd.), dehydrated with a dehydrator, dried, and cured with a batch type dryer at 110° C. for 60 minutes.

The first sliver S1 composed of 100% by mass of the water-soluble vinylon fiber, 20% by mass of the hydrophobic moisture-absorbing and desorbing heat-generating fiber, 40% by mass of the water-soluble vinylon fiber, and the polyester A second sliver S2 made up of 40% by mass of fibers, 30% by mass of the hydrophobic moisture-absorbing and desorbing heat-generating fibers, 35% by mass of the water-soluble vinylon fibers, and the polyester fibers. A third sliver S3 composed of 35% by mass of the above, a fourth sliver S3 composed of 25% by mass of the hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fiber, and 75% by mass of the polyester fiber A total of five types of sliver S4 and a fifth sliver S5 composed of 100% by mass of the polyester fiber were prepared.

[Preparation of spun yarn]
-Example 1-
As shown in FIGS. 1(a) and 1(b), of the eight slivers used in the drawing machine, two first slivers S1 are placed in the center, and two slivers are arranged on each side of the two first slivers S1 for a total of four slivers. A roving was made using a second sliver S2 and a fourth sliver S4 on the remaining two sides.
The obtained roving yarn is stretched and twisted and wound around a bobbin, and the first sliver S1 serves as the core, the second sliver S2 serves as the intermediate layer, and the fourth sliver S4 serves as the outer layer. The spun yarn related to 1 was completed.

-Example 2-
As shown in FIGS. 2(a) and 2(b), of the eight slivers used in the drawing machine, except that the fourth sliver S4 of Example 1 was changed to the fifth sliver S5, In the same manner as in No. 1, the spun yarn according to Example 2 corresponding to 40 count was completed, in which the first sliver S1 was the core, the second sliver S2 was the intermediate layer, and the fifth sliver S5 was the outer layer.

-Example 3-
As shown in FIGS. 3(a) and 3(b), the process from the core to the outer layer was carried out in the same manner as in Example 1 except that the third sliver S3 was used for all of the eight slivers used in the drawing machine. The spun yarn according to Example 3 corresponding to the 40th count was completed, all of which were the third sliver S3.

-Example 4-
As shown in FIGS. 4(a) and 4(b), of the eight slivers used in the drawing machine, the central two first slivers S1 in Example 1 were changed to second slivers S2, In the same manner as in Example 1 except that the fourth sliver S4 on the outside was changed to the fifth sliver S5, the core and the intermediate layer became the second sliver S2, and the outer layer became the fifth sliver S5, equivalent to 40 count. A spun yarn according to Example 4 of was completed.

-Comparative Example 1-
A spun yarn according to Comparative Example 1 corresponding to 40 count was completed in the same manner as in Example 1 above, except that the eight slivers used in the drawing machine were all the fourth sliver S4.

-Comparative Example 2-
A spun yarn according to Comparative Example 2 corresponding to 40 count was completed in the same manner as in Example 1 above, except that the sliver used in the drawing machine was the fifth sliver S5.

[Preparation of test dough]
Using the spun yarns of Examples 1 to 4 and Comparative Examples 1 and 2, respective fabrics were produced.
The fabric is 135 ± 5 g / m using a general-purpose type test tube knitting machine with a knitting pot diameter of 3.5 inches, and the vertical / horizontal per inch is 37 ± 1 / 26 ± 1. It is ² cotton sheeting knitting.

-Example 1-
The fabric using the spun yarn according to Example 1 thus obtained was washed with hot water at 90 ° C. to dissolve the water-soluble vinylon fibers, and the traces of dissolution became voids, which are substantially hydrophobic. It was a processed fabric of tenjiku knitting by spun yarn equivalent to No. 40 formed by hygroscopic and heat-generating fibers, polyester fibers and voids.
As shown in FIG. 1(c), the spun yarn that constitutes this processed fabric is formed by dissolving water-soluble vinylon fibers, so that the core is composed of voids V, and the intermediate layer is a hydrophobic moisture-absorbing and desorbing moisture-absorbing and heat-generating material. The outer layer is composed of hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fibers a and polyester fibers p. It was configured to be

-Example 2-
The fabric using the spun yarn according to Example 2 obtained in this way was washed with hot water under the same conditions as in Example 1 to dissolve the water-soluble vinylon fibers, and the traces of dissolution became voids. It was a processed fabric of jersey knitting by spun yarn equivalent to No. 40 substantially formed by hydrophobic moisture-absorbing and desorbing moisture-absorbing and heat-generating fibers, polyester fibers, and voids.
As shown in FIG. 2(c), the spun yarn constituting this processed fabric has a core composed of voids V, and an intermediate layer composed of hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fibers a, polyester fibers p, and voids V. An outer layer was composed of the polyester fiber p, and the voids V were composed so as to become denser from sparse toward the outside from the center.

-Example 3-
The fabric using the spun yarn according to Example 3 obtained in this way was washed with hot water under the same conditions as in Example 1 to dissolve the water-soluble vinylon fibers, and the traces of dissolution became voids. It was a processed fabric of jersey knitting by spun yarn equivalent to No. 40 substantially formed by hydrophobic moisture-absorbing and desorbing moisture-absorbing and heat-generating fibers, polyester fibers, and voids.
As shown in FIG. 3(c), the spun yarn that constitutes this processed fabric is composed of the core, the intermediate layer, and the outer layer, which are all composed of hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fibers a, polyester fibers p, and voids V. and the voids V were evenly provided from the core to the outer layer.

-Example 4-
The fabric using the spun yarn according to Example 4 thus obtained was washed with hot water under the same conditions as in Example 1 to dissolve the water-soluble vinylon fibers, and voids were formed after dissolution. It was a processed fabric of jersey knitting by spun yarn equivalent to No. 40 substantially formed by hydrophobic moisture-absorbing and desorbing moisture-absorbing and heat-generating fibers, polyester fibers, and voids.
As shown in FIG. 4(c), the spun yarn constituting this processed fabric has a core and an intermediate layer composed of hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fibers a, polyester fibers p, and voids V, and an outer layer was composed of the polyester fiber p, and the voids V were evenly provided between the core and the intermediate layer.

-Comparative Example 1-
The fabric using the spun yarn according to Comparative Example 1 obtained in this way was washed with hot water under the same conditions as in Example 1, but since it does not contain water-soluble vinylon fibers that dissolve, it is substantially hydrophobic. A processed cloth of tubular jersey knit was obtained from a 40-count spun yarn composed of moisture-absorbing and desorbing moisture-absorbing heat-generating fibers and polyester fibers.
The spun yarn that constitutes this processed fabric is composed of hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fibers and polyester fibers, and does not have any voids other than the gaps formed during spinning and fabric production. rice field.

-Comparative Example 2-
The fabric using the spun yarn according to Comparative Example 2 obtained in this way was washed with hot water under the same conditions as in Example 1, but since it does not contain water-soluble vinylon fibers that dissolve, it is substantially polyester fiber. It became a processed fabric of tubular jersey knitted with spun yarn equivalent to No. 40, which was composed of chisels.
The spun yarn constituting this processed fabric was composed only of polyester fibers, and a fabric with no voids other than the gaps formed during spinning and fabric production was obtained.

[Moisture absorption test]
A moisture absorption test was conducted using each of the processed fabrics of Examples 1-4 and Comparative Examples 1-2.

Moisture absorption test A
In the moisture absorption test A, the moisture absorption capacity was measured under environmental conditions assuming contact with liquid phase moisture such as perspiration and rain. In this moisture absorption test A, after making each processed fabric in an absolute dry state, the weight of the processed fabric in the absolute dry state is taken as 100%, and a water tank filled with water at 23 ° C. under environmental conditions of 25 ° C. and 60% RH. The weight change was measured after floating on water for 90 minutes. The results are shown in FIG. Each processed fabric does not absorb water in the water tank due to the hydrophobicity of the processed fabric, but while absorbing water vapor equivalent to the saturated water vapor pressure on the water surface of the water tank at 23 ° C., from the surface not in contact with the water surface, 25 ° C. Moisture is released under the environmental condition of 60% RH. The numerical values in the figure indicate the weight change rate (X) with respect to the absolute dry state in each sample.

Moisture absorption test B
In the moisture absorption test B, the moisture absorption capacity was measured under environmental conditions assuming a saturated state of gaseous moisture (steam), that is, a stuffy state. In this moisture absorption test B, after making each processed fabric absolutely dry, the weight of this processed fabric in the absolutely dry state is taken as 100%, and it is left for 90 minutes in a windless environment at 25 ° C. and 95% RH. Weighed. The results are shown in FIG. The numerical values in the figure indicate the saturation weight change rate (Y) with respect to the absolute dry state in each sample.
The value (YX) obtained by subtracting the weight change rate X in the moisture absorption test A from the saturated weight change rate Y was taken as the residual moisture absorption power factor. The larger the numerical value, the greater the excess moisture absorption capacity. Also, the value of weight change rate/saturation weight change rate (X/Y) in moisture absorption test A was determined and used as the dynamic equilibrium coefficient. The smaller this value is, the less likely it is to be affected by moisture even under environmental conditions such as rain and sweat, and the processed fabric will be in a dynamic equilibrium state in which the balance between moisture absorption and moisture release can be maintained for a long time. Table 1 shows the results of the moisture absorption reserve power factor and the dynamic equilibrium coefficient.

The processed fabric composed of the spun yarn according to the present invention has a moisture absorption capacity rate of about three times or more that of the conventional processed fabric according to Comparative Example 1, even in the presence of liquid phase moisture such as sweat and rain. will have. Furthermore, in the case of the conventional fabric according to Comparative Example 1, the value of weight change rate/saturated weight change rate (X/Y) is close to 1, but in the case of the processed fabric of the present invention according to each example, The dynamic balance factor is less than about 0.9. In other words, it is shown that the processed fabrics of the present invention according to each example absorb moisture from the surface of the water and have high moisture releasing properties to the outside air, thereby reducing the moisture retention rate. In other words, it can be said that the dynamic equilibrium coefficient is low. This factor is presumed to be the effect of voids forming the spun yarn. Therefore, in the case of the processed fabric composed of the spun yarn according to the present invention, even in an environment where it gets wet with sweat, rain, etc., it actively absorbs and desorbs moisture, thereby maintaining moisture absorption and heat generation and keeping it warm. can have the ability to sustain

[Fever test]
A heat generation test was conducted using each of the processed fabrics of Examples 1-4 and Comparative Examples 1-2.
In the test, after making each processed fabric absolutely dry, it was floated in a water tank containing water of 15 to 16 ° C under environmental conditions of 20 ° C and 65% RH, and the surface temperature of the fabric floating in this water was changed over time. Changes were measured with a non-contact thermometer. The results are shown in FIG.

The processed fabric composed of the spun yarn according to the present invention maintains a temperature higher than the environmental temperature (20 ° C.), and the temperature change is kept within the range of 1 ° C. even after 10 minutes from the start of measurement. was confirmed. Considering that the temperature of the conventional processed fabric according to Comparative Example 1 decreased by about 2° C. after 10 minutes from the initial heat generation, it was confirmed that the heat retaining effect due to the heat generated by moisture absorption was maintained.

In addition, the present invention can be embodied in various other forms without departing from its spirit or essential characteristics. Therefore, the above-described embodiments are merely illustrative in all respects and should not be construed in a restrictive manner. The scope of the present invention is indicated by the claims, and is not restricted by the text of the specification. Furthermore, all modifications and changes within the scope of the claims are within the scope of the present invention.

Other possible yarns and textures are shown below.

-Example 5-
The roving produced using the third sliver S3 is supplied before or after the front roller of the fifth sliver S5 spun from the roving machine, and the outer side is covered with the fifth sliver S5 to have a structure close to a two-layer structure. A spun yarn with This spun yarn had a higher coverage with the fifth sliver S5 than the spun yarn of Example 4, in which each sliver was blended by a drawing machine.
A processed fabric was constructed in the same manner as in Example 1, and the spun yarn was formed by dissolving the water-soluble vinylon fiber, so that the core was composed of the hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fiber a, the polyester fiber p, and the void V. The outer layer was composed of the polyester fiber p, and the coverage ratio of the polyester fiber p was higher than that of Example 4 described above.

-Example 6-
By supplying two roving yarns prepared in Example 4 in the spinning process, the spinning and twisting method has less fluff, is uniform and has less unevenness, so it is less twisted and softer than the ordinary ring spinning method. Completed the spun yarn with the characteristics. The length and thickness of the fibers forming each sliver can be changed as appropriate, and are not particularly limited.
When a processed fabric was formed in the same manner as in Example 1, spiral voids were formed in the spun yarn after dissolving the water-soluble vinylon. Since the twist is less than usual, the void ratio between the fibers when the water-soluble vinylon is melted is also increased as compared with the spun yarn of Example 4, which was produced from the usual ring-spun yarn.

-Example 7-
By using only the third sliver S3 used in Example 3 and performing open-end spinning (rotor type) from the third sliver S3, the fibers are rearranged during spinning. A spun yarn having randomly arranged fibers and a feeling of swelling was completed. The length and thickness of the fibers forming each sliver can be changed as appropriate, and are not particularly limited.
When a processed fabric was formed in the same manner as in Example 1, the spun yarn was found to have randomly arranged fibers, so that the gaps between the fibers were random when the water-soluble vinylon was dissolved, and it had a feeling of swelling. became.

-Example 8-
Using only the third sliver S3 used in Example 3, by spinning with an open-end spinning (air jet type VORTEX spinning machine manufactured by Murata Machinery Co., Ltd.) from the third sliver S3, air A spun yarn in which each fiber is swirled in the longitudinal direction was completed by the swirling flow of the The yarn was strongly twisted on the outside and untwisted on the inside, resulting in a spun yarn with less fluff and excellent anti-pilling performance. The length and thickness of the fibers forming each sliver can be changed as appropriate, and are not particularly limited.
When a processed fabric was formed in the same manner as in Example 1, the spun yarn was found to have randomly arranged fibers, so that the gaps between the fibers were random when the water-soluble vinylon was dissolved, and it had a feeling of swelling. became.

-Example 9-
Using a roving composed only of the third sliver S3, the water-soluble vinylon fiber forming the center of the spun yarn is supplied to the center of the spun yarn by the front roller at the time of fine spinning spinning. A spun yarn having a core-sheath structure completely covered with sliver S3 roving was completed. The length and thickness of the fibers forming each sliver can be changed as appropriate, and are not particularly limited.
When the processed fabric was formed in the same manner as in Example 1, the spun yarn had a void V in the center, and the outer layer was composed of the hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fiber a, the polyester fiber p, and the void V. became a thing.

-Example 10-
A spun yarn of CSY (core-spun yarn) was completed in the same manner as in Example 9 except that the water-soluble vinylon fibers in Example 9 were changed to polyurethane filaments. This spun yarn had stretchability, and the third sliver S3 was arranged in the twist direction around the central polyurethane monofilament. The length and thickness of the fibers forming each sliver can be changed as appropriate, and are not particularly limited.
When a processed fabric was formed in the same manner as in Example 1, the spun yarn was composed of hydrophobic moisture-absorbing and desorbing heat-generating fibers a, polyester fibers p, and voids V around the polyurethane monofilament, and the voids V were randomly arranged. By configuring, it became softer and improved in bulkiness.

a Hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fiber p Polyester fiber V Void

Claims (12)

A spun yarn that is used as a processed fabric by post-processing the fabric,
Hydrophobic moisture-absorbing, moisture-absorbing, heat-generating fibers obtained by adding a hydrophobizing agent to acrylic fibers or moisture-absorbing, heat-generating fibers obtained by modifying acrylic fibers, dissolving fibers, and hydrophobic fibers are blended. become,
A spun yarn, characterized in that the dissolved fibers are dissolved and removed by post-processing of the fabric so that voids can be formed in the traces of the removed dissolved fibers. 2. The spun yarn according to claim 1, wherein the dissolved fibers are concentrated in the center so that the center can be formed sparsely. 3. The spun yarn according to claim 1 or 2, wherein the hydrophobic fibers are concentrated in the peripheral edge so that the peripheral edge can be densely formed. 4. The spun yarn according to any one of claims 1 to 3, wherein the hydrophobic moisture-absorbing/desorbing moisture-absorbing heat-generating fibers and the hydrophobic fibers are concentrated on the outer edge so that the outer edge can be densely formed. Concentrate the dissolving fiber in the center,
Hydrophobic fibers or hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fibers and hydrophobic fibers are concentrated on the outer periphery, and dissolving fibers, hydrophobic moisture-absorbing and desorbing moisture-absorbing heat-generating fibers and hydrophobic fibers are concentrated between the center and the outer periphery. 2. The spun yarn according to claim 1, which can be formed so as to be centralized, sparse in the center and denser toward the outer periphery. The spun yarn according to any one of claims 1 to 5, wherein 5 to 60% by mass of dissolved fibers are used. From the weight increase rate when the tenjiku knitted processed fabric in an absolute dry state is left for 90 minutes in a windless environment at 25 ° C. and 95% RH, the processed fabric is 23 under environmental conditions at 25 ° C. and 60% RH. 7. The spun yarn according to any one of claims 1 to 6, wherein the yarn has a residual hygroscopic capacity factor of 1.5% or more calculated by subtracting the weight increase rate after floating in a water tank containing water of 100°C for 90 minutes. The weight change rate when the tenjiku-knitted absolute dry processed fabric is floated in a water tank containing 23 ° C water for 90 minutes under environmental conditions of 25 ° C and 60% RH, and the processed fabric is 25 ° C, 95 7. The spun yarn according to any one of claims 1 to 6, wherein the value obtained by dividing by the saturation weight change rate when left for 90 minutes under windless environment conditions of % RH is 0.9 or less. The surface temperature is higher than the ambient temperature (20°C) when the tenjiku-knitted, absolute-dry processed fabric is floated in a water tank containing 15°C water in an atmosphere of 20°C and 65% RH. 9. The spun yarn according to any one of claims 1 to 8, wherein the temperature is maintained and the temperature change is kept within the range of 1°C even after 10 minutes from the start of measurement. A fabric composed of the spun yarn according to any one of claims 1 to 9. The dissolved fiber is removed from the fabric composed of the spun yarn according to any one of claims 1 to 9 by post-processing to dissolve and remove the dissolved fiber contained in the fabric, and the dissolved fiber is removed. Processed fabric with voids left behind. After forming a fabric from the spun yarn according to any one of claims 1 to 9, the dissolved fibers are dissolved and removed by post-processing of the fabric, thereby forming voids in the traces of the removed dissolved fibers. A method for manufacturing processed fabrics.

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