WO2020196901A1

WO2020196901A1 - Composite yarn, knitted fabric containing composite yarn, and method for manufacturing composite yarn

Info

Publication number: WO2020196901A1
Application number: PCT/JP2020/014400
Authority: WO
Inventors: 和樹村田
Original assignee: 旭化成株式会社
Priority date: 2019-03-28
Filing date: 2020-03-27
Publication date: 2020-10-01
Also published as: JPWO2020196901A1; TW202043563A

Abstract

Provided are: a composite yarn suitable for a knitted fabric that contains hydrophilic fibers, has good texture, and exhibits excellent water-absorbent/quick-drying performance; and a knitted fabric using the composite yarn. The present invention pertains to a composite yarn that includes a hydrophilic fiber multifilament and a hydrophobic fiber multifilament, a method for manufacturing the composite yarn, and a knitted fabric using the same, the composite yarn being characterized in that a fiber opening degree represented by formula (1): fiber opening degree = L/{R×√(F)) {in the formula, R represents the circle equivalent diameter of a single yarn of the hydrophilic fiber multifilament, F represents the number of single yarns of the hydrophilic fiber multifilament, and L represents a maximum distance, in a cross section of the composite yarn, between the outermost layer of a dispersion area (SC) of single yarns of the hydrophilic fiber multifilament and the outermost layer of a dispersion area (SG) of single yarns of the hydrophobic fiber multifilament} is less than 1.0, the hydrophilic fiber-to-SG ratio is not more than 20%, and the ratio, with respect to the SG, of an area (S) where the SG and the SC overlap with each other is not less than 80%.

Description

A composite yarn, a knitted fabric containing the composite yarn, and a method for producing the composite yarn.

The present invention relates to a composite yarn, a knitted fabric containing the composite yarn, and a method for producing the composite yarn.

Various functions are required for clothing that comes into direct contact with the skin. In particular, underwear and the like are worn under the outer layer even in midsummer, so it is necessary to sufficiently deal with a large amount of sweat treatment, suppress stickiness and wetness, and from the body. It is necessary to effectively treat the insensitive evaporation that occurs and reduce the humidity in the space between the body and the underwear to reduce the feeling of stuffiness and provide an overall comfortable fit. In addition, since it comes into direct contact with the skin, it is extremely important to touch the skin, and it is an important function to obtain a comfortable fit that it is smooth and soft, has excellent elasticity and is easy to move. Especially in countries where the temperature and humidity are high, it is extremely important to enhance the humidity and sweat treatment function due to insensitive evaporation from the body as underwear for spring and summer, and if these functions are not fully exhibited, No matter how good the tactile sensation is on the skin, it cannot be a comfortable underwear.

Conventionally, underwear using cellulose short fibers with excellent hygroscopicity and water absorption has been widely used, mainly made of 100% cotton material. Spinned yarn made of short cellulose fibers such as cotton is bulky and has a large porosity in the yarn. Therefore, a large amount of air having excellent heat insulating properties is present in the fabric, which provides heat dissipation and cool contact feeling. Because it was inferior to the above, it was easy to trap the heat from the body and it was inferior in the refreshing feeling. In addition, while cellulose short fibers are excellent in water absorption and moisture absorption, they are inferior in terms of sweat absorption, diffusion and quick-drying because the absorbed sweat is easily retained in the yarn or fabric due to their extremely high water retention, resulting in stickiness. It was easy, and the sticking of the fabric to the skin sometimes caused discomfort. Furthermore, there are drawbacks such as large dimensional changes such as shrinkage and stretching of the fabric due to repeated washing and the like, and the texture becomes rough and hard. On the other hand, clothing made of cellulose fiber multifilament can suppress bulkiness as compared with spun yarn, so that it is possible to improve heat dissipation and cool contact feeling, but like cotton, cellulose fiber Due to its extremely high water retention, it is easy to retain the absorbed sweat in the yarn or in the fabric, and it is inferior in terms of sweat absorption, diffusion, and quick-drying. As a result, it is easily sticky and causes discomfort due to the adhesion of the fabric to the skin. There was something. Further, the fabric shrinks or stretches due to repeated washing and the like, and the dimensional change is large, and the drawbacks such as the rough and hard texture are not improved.

On the other hand, clothing made of hydrophobic synthetic fiber (hereinafter, also referred to as synthetic fiber) multifilament has excellent dimensional stability and wet strength, but lacks water absorption and hygroscopicity, and sweat treatment / It was inferior to humidity treatment.

Patent Document 1 below proposes a fabric using a composite crimped yarn in which a cellulose fiber multifilament and a synthetic fiber multifilament are mixed and at least one of them is falsely twisted. It is said that the proposed fabric has less skin irritation, suppresses stuffiness, and has an excellent sweat treatment function in spite of its high cellulose fiber content. However, in the structure of the composite yarn described in Patent Document 1, it is preferable that cellulose is arranged in the center, and considering the sweat treatment function, cellulose which has water retention and is hard to dry is in the center. It is considered that the contact area between cellulose and the outside air is reduced, making it difficult to evaporate. Therefore, it is considered that the composite yarn structure described in Patent Document 1 is not the optimum structure for sweat treatment function, particularly for quick-drying.

Further, Patent Document 2 below has a structure of a composite yarn in which a hemp / rayon blended yarn is arranged in a sheath portion and a polyester filament having a modified cross section is arranged in a core portion, thereby providing both water absorption, moisture absorption and desorption, and quick drying. However, a composite yarn that has excellent texture and is suitable for knitting underwear and sportswear has been proposed. Cellulose fibers are arranged in the sheath portion, but since the cellulose fibers are blended yarns using short fibers, the porosity is large as compared with the case where cellulose filaments are used. Since water tends to stay in the voids, it is considered that the quick-drying property with respect to the filament deteriorates.

Further, Patent Document 3 below describes a covering technique in which cellulose filaments are arranged on the sheath side and polyester-based filaments are arranged on the core side, but the fiber bundle is wound like the covering. In the above method, evaporation of the outermost cellulose single yarn is promoted, but since it is bundled, water tends to stay between the cellulose single yarn and the water retention becomes high. Further, since the inside of the bundle does not come into contact with the outside air, it is difficult to evaporate, and it is expected that the quick-drying property will deteriorate. That is, as in the invention described in Patent Document 3, a method such as covering in which unopened cellulose is placed in a sheath cannot be in a form in which quick-drying is the best under any conditions.

Japanese Patent No. 3701872 Japanese Unexamined Patent Publication No. 2009-203557 Japanese Unexamined Patent Publication No. 2011-231422

In view of the above-mentioned prior art, the problem to be solved by the present invention is to use a composite yarn suitable for a knitted fabric which contains hydrophilic fibers, has a good texture, and has excellent water absorption and quick-drying properties, and the composite yarn. It is to provide a knitted fabric which has been used, and a method for producing the composite yarn.

As a result of diligent studies and experiments to solve the above problems, the present inventor has determined to obtain a composite yarn in which the opened hydrophilic fiber multifilament is arranged on the sheath side and the hydrophobic fiber multifilament is arranged on the core side. Therefore, it was unexpectedly found that the composite yarn and the knitted fabric containing the composite yarn could solve the above-mentioned problems, and the present invention was completed. That is, the present invention is as follows.

[1] A composite yarn containing a hydrophilic fiber multifilament and a hydrophobic fiber multifilament, wherein the following formula (1):
Openness = L / {R × √ (F)} ・・・ (1)
{In the formula, R is the equivalent circle diameter of the single yarn of the hydrophilic fiber multifilament, F is the number of single yarns of the hydrophilic fiber multifilament, and L is the hydrophilic fiber in the cross section of the composite yarn. The maximum distance between the outermost layer of the single yarn dispersion region (SC) of the multifilament and the outermost layer of the single yarn dispersion region (SG) of the hydrophobic fiber multifilament. } Is less than 1.0.
The following equation (3):
Ratio of hydrophilic fibers in SG (%) = {Amount of hydrophilic fibers in SG / (Total fineness of hydrophobic fiber multifilament + Amount of hydrophilic fibers in SG)} x 100 ... (3)
{In the formula, the amount of hydrophilic fibers in SG is the following formula (2):
Amount of hydrophilic fibers in SG = (number of single threads of hydrophilic fiber multifilaments in SG / total number of single threads of hydrophilic fiber multifilaments) x total fineness of hydrophilic fiber multifilaments ... (2)
It is represented by. } The proportion of hydrophilic fibers in SG is 20% or less; and the following formula (4):
Percentage of the area (S) where SG and SC overlap in SG = (area of S / area of SG) × 100 ... (4)
The proportion of S in the more sought after SG is 80% or more;
A composite thread characterized by that.
[2] The composite yarn according to the above [1], wherein the proportion of hydrophilic fibers in the SG is 10% or less.
[3] The following (a) to (d):
(a) The mixing ratio of the hydrophilic fiber multifilament in the composite yarn is 20 to 80 wt%;
(b) The total fineness of the composite yarn is 44 to 333 dtex;
(c) The single yarn fineness of the hydrophilic fiber multifilament is 0.1 to 5.6 dtex; and (d) the single yarn fineness of the hydrophobic fiber multifilament is 0.1 to 5.6 dtex;
The composite yarn according to the above [1] or [2], which satisfies the above conditions.
[4] The composite yarn according to any one of [1] to [3] above, wherein the hydrophilic fiber is a cellulose fiber.
[5] The composite yarn according to the above [1] to [4], wherein the hydrophobic fiber is a synthetic fiber.
[6] Knitted fabric containing the composite yarn according to any one of the above [1] to [5] [7] After the basis weight is 80 to 200 g / m ² and 0.3 ml of water is dropped. The knitted fabric according to the above [6], wherein the residual moisture content after 1 hour is within 30%.
[8] The knitted fabric according to the above [7] or [8], which has one or more knitting structures of tenjiku, milling, and smooth.
[9] A method for producing a composite yarn containing a hydrophilic fiber multifilament and a hydrophobic fiber multifilament, wherein the hydrophilic fiber multifilament that has been opened after the hydrophilic fiber multifilament is opened has a sheath. A method for producing a composite yarn, which comprises mixing a hydrophilic fiber multifilament and a hydrophobic fiber multifilament so as to be on the side.
[10] The production method according to the above [10], wherein the method for opening the hydrophilic fiber multifilament is false twisting.
[11] When the hydrophilic fiber multifilament and the hydrophobic fiber multifilament are combined, the feed length of the hydrophilic fiber multifilament is made larger than the feed length of the hydrophobic fiber multifilament. The production method according to [10].
[12] The following (a) to (d):
(a) The mixing ratio of the hydrophilic fiber multifilament in the composite yarn is 20 to 80 wt%;
(b) The total fineness of the composite yarn is 44 to 333 dtex;
(c) The single yarn fineness of the hydrophilic fiber multifilament is 0.1 to 5.6 dtex; and (d) the single yarn fineness of the hydrophobic fiber multifilament is 0.1 to 5.6 dtex;
The production method according to any one of the above [9] to [11], which satisfies the above conditions.
[13] The production method according to any one of [9] to [12] above, wherein the hydrophobic fiber multifilament before compounding has a boiling water shrinkage rate of 3% or more.
[14] The production method according to any one of [9] to [13] above, wherein the hydrophilic fiber multifilament is a cellulose fiber.
[15] The production method according to any one of [9] to [14] above, wherein the hydrophobic fiber multifilament is a synthetic fiber.

The composite yarn of the present invention and the knitted fabric containing the composite yarn have a good texture and excellent water absorption and quick-drying property.

It is a schematic diagram of the cross-sectional structure of an example of the composite yarn of this embodiment. It is a schematic diagram of the cross-sectional structure of an example of the aspect of the composite yarn of this embodiment having a relatively low degree of openness. It is a cross-sectional photograph of an example of the composite yarn of this embodiment. It is a cross-sectional photograph of an example of a false twist composite yarn of the prior art. It is a cross-sectional photograph of an example of a sheath core structure composite yarn by the covering of the prior art. It is a schematic diagram of the cutting method of the knitted fabric for observing the cross section of a composite thread. It is a schematic diagram which shows the determination method of "a single yarn located in the outermost layer". It is a photograph instead of the drawing which defined the dispersion region (SC) of a single yarn of a hydrophilic fiber multifilament and the dispersion region (SG) of a hydrophobic fiber multifilament in the cross section of the composite yarn of FIG.

Hereinafter, embodiments of the present invention will be described in detail.
In the present specification, the single yarn dispersion region of the hydrophilic fiber multifilament in the cross section of the composite yarn is referred to as SC, the single yarn dispersion region of the hydrophobic fiber multifilament is referred to as SG, and the overlapping region of SC and SG is referred to as S. The method of obtaining SC, SG, and S will be described in detail in the following examples.
The composite yarn of the present embodiment is a composite yarn containing a hydrophilic fiber multifilament and a hydrophobic fiber multifilament, and has the following formula (1):
Openness = L / {R × √ (F)} ・・・ (1)
{In the formula, R is the equivalent circle diameter of the single yarn of the hydrophilic fiber multifilament, F is the number of single yarns of the hydrophilic fiber multifilament, and L is the hydrophilic fiber in the cross section of the composite yarn. The maximum distance between the outermost layer of the single yarn dispersion region (SC) of the multifilament and the outermost layer of the single yarn dispersion region (SG) of the hydrophobic fiber multifilament. } Is less than 1.0.
The following equation (3):
Ratio of hydrophilic fibers in SG (%) = {Amount of hydrophilic fibers in SG / (Total fineness of hydrophobic fiber multifilament + Amount of hydrophilic fibers in SG)} x 100 ... (3)
{In the formula, the amount of hydrophilic fibers in SG is the following formula (2):
Amount of hydrophilic fibers in SG = (number of single threads of hydrophilic fiber multifilaments in SG / total number of single threads of hydrophilic fiber multifilaments) x total fineness of hydrophilic fiber multifilaments ... (2)
It is represented by. } The proportion of hydrophilic fibers in SG is 20% or less; and the following formula (4):
Percentage of the area (S) where SG and SC overlap in SG = (area of S / area of SG) × 100 ... (4)
The proportion of S in the more sought after SG is 80% or more;
It is characterized by that.

The openness expressed by the above formula (1) is less than 1.0. If the degree of opening is less than 1.0, the spread hydrophilic fiber multifilament is arranged on the sheath side and the hydrophobic fiber multifilament is arranged on the core side to form a sheath-core composite yarn, which is a water-retaining hydrophilic fiber. Since the contact area with the outside air is increased to facilitate evaporation, the area of hydrophilic fibers not in contact with the outside air is reduced, and the evaporability is further improved, good quick-drying can be realized. Further, since the opened hydrophilic fiber multifilament sufficiently covers the hydrophobic fiber multifilament and is arranged on the outside air side, the high contact cooling feeling of the hydrophilic fiber is sufficiently exhibited and the feel is good. R (corresponding circle diameter of the single yarn of the hydrophilic fiber multifilament), F (the number of single yarns of the hydrophilic fiber multifilament), and L (dispersion region of the single yarn of the hydrophilic fiber multifilament in the cross section of the composite yarn) The method for measuring the outermost layer of SC) and the outermost layer of the dispersion region (SG) of the single yarn of the hydrophobic fiber multifilament) will be described in detail in the column of Examples.

1 and 2 are conceptual views of a cross section of the composite yarn of the present embodiment, respectively. The embodiment in which the hydrophilic fiber multifilament completely covers the hydrophobic fiber multifilament as shown in FIG. 1 is preferable from the viewpoints of touch, cool contact, and quick-drying water absorption, but is hydrophobic as shown in FIG. Even in a mode in which the fiber multifilament is partially in contact with the outside air, a desired effect can be obtained if the requirements specified in the above [1] are satisfied.
FIG. 3 is a cross-sectional photograph of an example of the composite yarn of the present embodiment. The hydrophilic fiber multifilament is open and sufficiently covers the hydrophobic fiber multifilament.
FIG. 4 is a cross-sectional photograph of an example of a false twist composite yarn of the prior art, in which the hydrophilic fiber multifilament is not opened and exists in a bundle shape. In addition, most of the hydrophobic fiber multifilaments are exposed to the outside air side. In this case, the degree of fiber opening is 1.0 or more, and good contact cold sensitivity, quick-drying property, and touch cannot be achieved.
FIG. 5 is a cross-sectional photograph of an example of a sheath-core structure composite yarn produced by a conventional covering, in which the hydrophilic fiber multifilament is not opened and exists in a bundle shape. In addition, about half of the hydrophobic fiber multifilament is exposed to the outside air side. Also in this case, the degree of fiber opening is 1.0 or more, and good contact cold sensation, quick-drying property, and touch cannot be achieved.

The composite yarn of the present embodiment has the following formulas (2) and (3):
Amount of hydrophilic fibers in SG = (number of single threads of hydrophilic fiber multifilaments in SG / total number of single threads of hydrophilic fiber multifilaments) x total fineness of hydrophilic fiber multifilaments ... (2)
Ratio of hydrophilic fibers in SG (%) = (Amount of hydrophilic fibers in SG / (Total fineness of hydrophobic fiber multifilament + Amount of hydrophilic fibers in SG)) × 100 ... (3)
The more desired proportion of hydrophilic fibers in SG is 20% or less, preferably 15% or less, more preferably 10% or less, and the following formula (4):
Percentage of S in SG = (Area of S / Area of SG) x 100 ... (4)
The ratio of S in the SG represented by is 80% or more, preferably 85% or more, and more preferably 90% or more.
When the proportion of hydrophilic fibers in SG is 20% or less, the hydrophilic fiber multifilaments inside the hydrophobic fiber multifilaments are easy to dry, and good quick-drying properties can be obtained. On the other hand, if the ratio of S in SG is 80% or more, in other words, if the exposure of the hydrophobic fiber multifilament is less than 20%, the high contact cooling sensation of the hydrophilic fiber is sufficiently exhibited. It also feels good on the skin.

As a method for producing the composite yarn of the present embodiment, it is preferable to mix the spread hydrophilic fiber multifilament and the hydrophobic fiber multifilament so as to have a sheath core structure, and at least one of them is falsely twisted. It is more desirable to process. It is expected that the knitting property, stretchability, strength, etc. will be improved by applying the false twisting process. The method of false twisting is not particularly limited as long as it can be false twisted and can be heated in the false twist zone, and is generally used as a belt nip type, pin type, friction type, or air twisting type. Etc. can be used.
The method for opening the hydrophilic fiber multifilament is not particularly limited, but there are a method using a yarn that does not use a converging agent and a method for opening the fiber by applying a physical force such as air, friction, and false twist. From the viewpoint of increasing the degree of fiber opening, fiber opening by false twisting is preferable.
The method of forming a sheath core structure is not limited, and a method of making a difference in the amount of yarn fed (length) at the time of mixing fibers or a method of using a hydrophobic fiber multifilament having high boiling water shrinkage. There is. From the viewpoint of making it easier to form a sheath core structure, it is preferable that the feed length of the hydrophilic fiber multifilament is larger than the feed length of the hydrophobic fiber multifilament at the time of mixing, and it is particularly preferable to increase it by 1% or more. It is more preferable to increase it by% or more. From the same viewpoint, the boiling water shrinkage rate of the hydrophobic fiber multifilament is preferably 3% or more.

Examples of the fiber mixing method include an air entanglement method called interlace and a method of opening and entwining fibers by an electric fiber opening method using electrostatic force. In the case of the interlaced method, the number of entanglements is preferably 20 or more and 120 or less per 1 m of thread length from the viewpoint of uniform fiber mixing. More preferably, the number is 70 or more and 120 or less. When the number of entanglements is 20 or more, the single yarns are uniformly mixed, and when the number is 120 or less, the swelling of the yarns increases, the skin feels soft, and the skin irritation decreases.

The hydrophilic fiber multifilament constituting the composite yarn of the present embodiment is a multifilament having an official moisture content of 5% or more, and is, for example, wool, silk, or cellulose fiber (biscose method rayon, polynosic rayon, purified cellulose fiber). , Copper ammonia method rayon, etc.), casein fiber, regenerated silk thread, acetate (diacetate), promix, vinylon, synthetic fiber in which a hydrophilic group is introduced by post-processing, etc., and cellulose fiber is particularly preferable. Further, the hydrophilic fiber multifilament may contain a matting agent such as titanium oxide or various known additives depending on the purpose.

The hydrophobic fiber multifilament constituting the composite yarn of the present embodiment is a multifilament having an official moisture content of less than 5%, and is not subjected to hydrophilic treatment so that the official moisture content is 5% or more, for example. There are synthetic fibers such as polyester-based synthetic fibers, polyamide-based synthetic fibers, and polyolefin-based synthetic fibers. Examples of polyester-based synthetic fibers include polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, atmospheric pressure dyeable type polyethylene terephthalate, and examples of polyamide-based fibers include nylon 6 and nylon 66. The spinning method of these hydrophobic fiber multifilaments is not particularly limited, and known methods can be used, and undrawn yarns and semi-drawn yarns (POY) may be used as the case may be used. Further, it may be a raw yarn or a processed yarn that has been false-twisted or twisted.
The cross-sectional shape of the hydrophobic fiber multifilament is not particularly limited, and is round, flat, triangular, L-shaped, T-shaped, Y-shaped, W-shaped, π-shaped, cross-shaped, well-shaped, eight-leaf type, and eight-shaped. , Glasses type, glasses type with two holes hollow, polygonal type such as dogbone type, multi-leaf type, one-hole hollow type, multi-hole hollow type, or irregular shape, and these may be mixed. It may be a thing. Of these, Y-type, W-type, cross-shaped, well-shaped, eyeglass-shaped, eyeglass-shaped two-hole hollow, and L-shaped ones are preferable because they have excellent wicking properties due to capillarity and high water absorption.

The total fineness of the composite yarn of the present embodiment is preferably 44 to 333 dtex, more preferably 56 to 278 dtex, and further preferably 67 to 167 dtex. If it is 44 dtex or more, it has sufficient strength as a cloth for clothing, while if it is 333 dtex or less, the cloth can be thinned, a feeling of wearing comfort can be obtained, and the feel is also good.

The total fineness of the hydrophilic fiber multifilament constituting the composite yarn of the present embodiment is preferably 22 to 167 dtex, more preferably 110 dtex or less, still more preferably 84 dtex or less. If it is 22 dtex or more, thread breakage during the production of composite yarn can be suppressed, while if it is 167 dtex or less, the knitted fabric can be flattened because it is flexible, and it has a cool contact feeling, heat dissipation, and touch. It will be good.
The single yarn fineness of the hydrophilic fiber multifilament constituting the composite yarn is preferably 0.1 to 5.6 dtex, more preferably 2.8 dtex or less, still more preferably 2.0 dtex or less. When the single yarn fineness of the hydrophilic fiber multifilament is 5.6 dtex or less, the feel is good and it is preferable.

The total fineness of the hydrophobic fiber multifilament constituting the composite yarn of the present embodiment is preferably 22 to 167 dtex, more preferably 110 dtex or less, still more preferably 84 dtex or less. If it is 22 dtex or more, thread breakage during the production of composite yarn can be suppressed, while if it is 167 dtex or less, the knitted fabric can be flattened because it is flexible, and it has a cool contact feeling, heat dissipation, and touch. It will be good.
The single yarn fineness of the hydrophobic fiber multifilament constituting the composite yarn is preferably 0.1 to 5.6 dtex, more preferably 2.8 dtex or less, still more preferably 2.0 dtex or less. When it is 5.6 dtex or less, the texture and the touch are good, and the skin irritation is also low, which is preferable.

The mixing ratio of the hydrophilic fiber multifilament in the composite yarn of the present embodiment is preferably 20 wt% to 80 wt%, more preferably 30 wt% to 70 wt%, and further preferably 40 wt% to 60 wt%. When the mixing ratio of the hydrophilic multifilaments in the composite yarn is 20 wt% or more, the hydrophobic fiber multifilaments can be sufficiently covered with the hydrophilic fiber multifilaments, the hydrophobic multifilaments are not exposed, and the hydrophilic fibers It does not hinder a high cool contact feeling or cause deterioration of the touch. On the other hand, when the mixing ratio is less than 80 wt%, the area of the hydrophilic fibers that do not come into contact with the outside air can be suppressed, and the quick-drying property becomes high.

Another embodiment of the present invention is a knitted fabric containing the composite yarn.
The mixing ratio of the hydrophilic fibers in the knitted fabric of the present embodiment is preferably 10 wt% to 80 wt%. If it is 10 wt% or more, it has high hygroscopicity and moisture release, is excellent in insensitive evaporation treatment from the body, does not make clothes stuffy and uncomfortable to wear, and has good coldness, heat dissipation, and touch. .. On the other hand, if it is 80 wt or less, it has sufficient quick-drying property after sweating, and it is possible to suppress discomfort such as stickiness and sticking to the skin.

The basis weight of the knitted fabric of the present embodiment is preferably 80 to 200 g / m ² , and the residual moisture content 1 hour after dropping 0.3 ml of water is preferably within 30%. If the basis weight is 80 g / m ² or more, sweat can be sufficiently absorbed and there is little stickiness. On the other hand, if the basis weight is 200 g / m ² or less, it is easy to move while wearing and the knitted fabric is easy to dry and comfortable.

The method for manufacturing the knitted fabric of the present embodiment is not particularly limited, and it can be manufactured using a normal knitting machine. Further, the knitting structure is not particularly limited, and various knitting structures such as milling cutter, smooth, tenjiku, Kanoko, Katabukuro, Punch Roma, Milan rib, and pearl knitting can be mentioned. Further, these changing tissues can also be used and can be appropriately selected according to the purpose. For clothing and underwear that come into direct contact with the skin, those with an excellent fit that fits the body are more preferred. Therefore, in order to improve the stretch and fit, a tissue using spandex or the like such as bare cloth is also preferable.

The processing method of the knitted fabric of the present embodiment is not particularly limited, and it may be dyed in addition to being whitened by bleaching and bleaching finish. Hydrophilic fiber composite threads and hydrophobic fiber multifilament threads can be dyed by, for example, a yarn dyeing method performed in the state of threads such as heddle or cheese, or a post dyeing method performed in a knitted fabric form. As the dye, the auxiliary agent, and the finishing agent, those used for dyeing the hydrophobic fibers and / or the hydrophilic fibers that are generally commercially available can be arbitrarily selected according to the purpose. It is also possible to optionally use a fluorescent whitening agent. Furthermore, when dyeing a knitted fabric, scouring, bleaching / bleaching, alkali treatment for improving dyeing of hydrophilic fibers, and alkali weight reduction performed on polyester fibers, which are usually performed before dyeing, are performed. You may.

In addition, as a processing method for the knitted fabric of the present embodiment, heat setting in a raw machine state is carried out according to the purpose in order to stabilize the amount of fabric during dyeing and to obtain a stable and appropriate amount as a product. You may. Conditions such as temperature, speed, set width, and overfeed rate at this time may be appropriately selected from the target fabric weight, stretchability, etc., but the fabric is yellowed, roughly cured, and the single yarn is heat-sealed. It is desirable to keep the temperature below 200 ° C. in terms of preventing It is also possible to add a yellowing inhibitor at the time of setting the raw machine from the viewpoint of preventing yellowing of the dough during high temperature treatment.
The conditions of the finishing set are also not particularly limited, but the temperature is preferably 180 ° C. or lower, more preferably 160 ° C. or lower, so as not to impair the texture, the elastic feeling of the fabric, and the crimping feeling. When the temperature is 180 ° C. or lower, texture hardening is unlikely to occur, and the texture is good. In addition, it is preferable because it does not easily cause bleed-out of the dye and has good fastness.

Hereinafter, the present invention will be specifically described with reference to Examples. Each evaluation measurement value in the example was measured by the following method.
(1) Openness The knitted fabric is cut perpendicularly to the knitted fabric plane in the cutting direction shown in FIG. 6 with a razor to prepare 10 thread cross sections. The cut knitted fabric is fixed to the sample table using double-sided tape so that the thread cross sections at the 10 locations can be observed, and the openness of each thread cross section is calculated by the following procedure.
A photograph of each thread cross section is taken using a KEYENCE microscope VHX-6000. In each thread cross-sectional photograph, among the single threads of the hydrophobic fiber multifilament, the line that is in contact with each of the "single threads of the hydrophobic fiber multifilament located in the outermost layer", surrounds the single thread, and defines the area. The dispersion region (SG) of the single yarn of the hydrophobic fiber multifilament is determined so that the length of the hydrophobic fiber multifilament is minimized. Here, as shown in FIG. 7, the “single yarn of the hydrophobic fiber multifilament located in the outermost layer” is from the center of the smallest circle including all the single yarns of the hydrophobic fiber multifilament (lower part of FIG. 7). (X), two parallel yarns separated from each other in the radial direction of the circle (in the upward direction in FIG. 7) with a width equal to the diameter of the single yarn (corresponding diameter of the circle) toward a single yarn. When the dotted line is drawn, the width between two parallel dotted lines extending radially from the single yarn is one or more single yarns located outside the single yarn (upper part of FIG. 7). A single yarn in which the total length of the portions where the yarn penetrates is less than 50% of the width between the two parallel dotted lines. Further, when the values are less than 50% and 50% or more, a part of the line defining the region is shown in FIG. 7, respectively.
Similarly, in each yarn cross-sectional photograph, among the single yarns of the hydrophilic fiber multifilament, each of the "single yarns of the hydrophilic fiber multifilament located in the outermost layer" is in contact with and surrounds the area. The dispersion region (SC) of the single yarn of the hydrophilic fiber multifilament is determined so that the length of the line demarcating is minimized. Here, the "single yarn of the hydrophilic fiber multifilament located in the outermost layer" is also determined in the same manner as the "single yarn of the hydrophobic fiber multifilament located in the outermost layer".
Next, all the single yarns of the hydrophobic fiber multifilament described above are applied toward an arbitrary point (referred to as point A) on the line segmenting the outermost layer of the dispersion region (SG) of the single yarn of the hydrophobic fiber multifilament. A line is drawn from the center of the smallest circle including the line segment, and the intersection of the line and the line defining the outermost layer of the dispersion region (SC) of the single yarn of the hydrophilic fiber multifilament is set as B, and the distance of the line segment AB is measured. The distance of the line segment AB is measured at any five points, and the longest one is defined as the maximum distance L.
Further, in the cross-sectional photograph, the number of single threads F of the hydrophilic fiber multifilament is visually measured.
Regarding the circle-equivalent diameter R of the single yarn of the hydrophilic fiber multifilament, similarly, using the microscope VHX-6000 manufactured by KEYENCE, the area measurement (free line) of the scale term is measured from the cross-sectional photograph. The thread area is measured, and the following formula (5):
Circular equivalent diameter of single yarn of hydrophilic fiber multifilament R = √ (4 x single yarn area / π) ・・・ (5)
To be calculated by. In the cross-sectional photograph of the yarn, five arbitrary single yarns are measured, and the average thereof is defined as the circle-equivalent diameter R of the single yarn of the hydrophilic fiber multifilament.
From R, F, and L obtained as described above, the following equation (1):
Openness = L / {R × √ (F)} ・・・ (1)
The degree of openness is calculated from the above.
The minimum value among the calculated openness of the thread cross sections at 10 locations is defined as the openness of the composite thread.

(2) Hydrophilic fiber ratio in SG In the thread cross section observed in (1) above, when the dispersion region of the single yarn of the hydrophobic fiber multifilament is SG, the hydrophilic fiber ratio in SG is the following formula (2) and (3):
Amount of hydrophilic fibers in SG = (number of single yarns of hydrophilic multifilaments in SG / total number of single yarns of hydrophilic fiber multifilaments) × total fineness of hydrophilic fiber multifilaments ... (2)
Ratio of hydrophilic fibers in SG (%) = (Amount of hydrophilic fibers in SG / (Total fineness of hydrophobic fiber multifilament + Amount of hydrophilic fibers in SG)) × 100 ... (3)
Ask more. The proportion of hydrophilic fibers in SG is determined for each of the 10 yarn cross sections observed in (1) above, and the average value thereof is taken as the proportion of hydrophilic fibers in SG of the composite yarn.

(3) Ratio of S in SG In the thread cross section observed in (1) above, the dispersion area of the single yarn of the hydrophobic fiber multifilament is SG, and the dispersion area of the single yarn of the hydrophilic fiber multifilament is SC, SG. When the area where the thread and the SC overlap is set to S, the areas of SG and S are derived by the area measurement (polygon) of the measurement / scale term with the microscope VHX-6000 manufactured by KEYENCE, and the S occupied in the SG. The ratio of is calculated by the following formula (4):
Percentage of S in SG (%) = (Area of S / Area of SG) x 100 ... (4)
Ask more. For each of the 10 thread cross sections observed in (1) above, the proportion of S in the SG is determined, and the average value thereof is taken as the proportion of S in the SG of the composite yarn.

(4) Mixing ratio of hydrophilic fiber multifilament in composite yarn After confirming the composition of the composite yarn by a fiber discrimination method such as a combustion test, a microscopic test, or an infrared absorption spectrum, the fiber mixing ratio is calculated by a dissolution method.

(5) Total fineness of composite yarn The total fineness of composite yarn is measured by applying method B (simple method) in JIS L 1013: 2010 “Chemical fiber filament yarn test method”.

(6) Total fineness / single yarn fineness of hydrophilic fiber multifilament and hydrophobic fiber multifilament in composite yarn For single yarn fineness, the fineness of the remaining fibers by the dissolution method is measured and used as each total fineness. , The single yarn fineness is calculated by dividing the total fineness by the number of filaments.

(7) Metsuke After adjusting the humidity of the knitted fabric in an environment of 20 ° C. × 65 Rh for one day and night, it is sampled in 10 cm square, its weight is measured, and it is expressed in g / m ² .

(8) Water absorption and quick drying (residual moisture content%)
A sample whose humidity has been adjusted for one day and night in an environment of 20 ° C. and 65% Rh is sampled in a 10 cm square and its weight is measured. Then, the sample is placed on a plastic cup in an environment of 20 ° C. × 65% Rh with the surface in contact with the skin facing up, 0.1 ml of water is dropped from the top of the dough, and the weight immediately after the drop is measured. After leaving it on the plastic cup for 30 minutes, weigh the wet dough and measure the following formula (6):
{(X1-X0) / X0} x 100 ... (6)
{In the formula, X0 is the weight of the dough before dripping water, and X1 is the weight of the wet dough after 30 minutes of dripping. }
The residual water content (%) after 60 minutes is calculated. In Examples and Comparative Examples, 30% or less was regarded as acceptable.

(9) Feeling on the skin Use a static / dynamic friction measuring instrument TL201Ts (manufactured by Trinity Lab Co., Ltd., table swing type).
A knitted fabric sample cut to a width of 5 cm and a length (vertical) of 25 cm is fixed to a measuring machine in a state where the knitted fabric sample is stretched by 2% using a cone with the surface corresponding to the skin facing up. As a contact, a 1.5 cm ² tactile contact (a contact having a hardness equivalent to that of a fingertip) is used, and a load of 3.75 g is applied to the contact to make three reciprocations at a moving distance of 10 cm. The moving distance is 30 mm / s, and the standard deviation of the dynamic friction coefficient within 10 cm of movement is calculated. The average value of the values for three round trips in each direction of forward / backward is calculated and used as the evaluation value. In the examples and comparative examples, 0.300 or less was regarded as acceptable.

(10) cool contact-sensitive ^{(Qmax (W / cm 2/} 10 ℃))
A sample whose humidity has been adjusted for one day and night in an environment of 20 ° C. and 65% Rh is sampled in a 7 cm square. In a 20 ° C. 65% Rh environment, using Thermolab II manufactured by Katou Tech Co., Ltd., a hot plate heated to 30 ° C., which is 10 ° C. higher than room temperature, was placed on a dough placed on Styrofoam with the side in contact with the skin facing up. The maximum heat transfer amount (Qmax) at the moment is measured. In Examples and Comparative Examples were evaluated as acceptable 100W / cm ^2/10 ℃ or higher.

(11) Official moisture content (%)
The official moisture content of each fiber constituting the composite yarn is according to Table 1 of JIS L 0105: 1994. In the case of fibers not listed in Table 1, the method described in "8.1. Moisture content" of JIS L 1013: 1999 is applied to the sample whose humidity is adjusted for one day and night in an environment of 20 ° C. and 65% Rh. To measure.

(12) Boiling water shrinkage rate (%)
Measure according to JIS L 1013: 1999 "8.18.1 Hot water shrinkage rate b) Filament shrinkage rate (B method)".

[Example 1]
As a hydrophobic fiber multifilament, polyester (abbreviated as Pe in Table 1 below) POY 40dtex24f is processed by an IVF338 pin type false twister manufactured by Ishikawa Seisakusho Co., Ltd. at a processing speed of 100 m / min, and a first heater temperature of 180 ° C. A 2-heater false-twisted yarn with a boiling water shrinkage rate of 3.5% obtained by false-twisting under the conditions of a second heater of 150 ° C. and a spindle rotation speed of 4000, and 84dtex54f cupra yarn (Asahi Kasei) as a hydrophilic fiber multifilament. Bemberg (registered trademark) manufactured by Hebaline Co., Ltd., which is abbreviated as Cu in the table) is tentatively twisted and opened under the condition of a spindle rotation speed of 2000 without heating. The fibers were mixed to obtain a composite yarn of 106 dtex78f. At the time of fiber mixing, the fibers were mixed by increasing the overfeed rate by 5% with respect to the hydrophobic fiber multifilament so that the opened hydrophilic fiber multifilament was on the sheath side. Using this composite yarn and 22 dtex spandex yarn (abbreviated as Pu in Table 1 below), a knitted fabric of bare heaven structure was obtained with a 28 gauge single circular knitting machine.
The knitted fabric was set in a pin tenter at 200 ° C. and then refined at 90 ° C., and only cupra was dyed for structural judgment. After dyeing, it was treated in a hot water bath at 90 ° C. containing a water absorption processing agent (SR1000: Takamatsu Oil & Fat Co., Ltd.). Finally, the setting was performed with a pin tenter at 140 ° C. for 60 seconds.

[Example 2]
As a hydrophobic fiber multifilament, 26dtex20f of nylon (abbreviated as Ny in Table 1 below) 66POY is processed by an IVF338 pin type false twister manufactured by Ishikawa Seisakusho Co., Ltd. at a processing speed of 100 m / min, and a first heater temperature of 130 ° C. A 1-heater false twist yarn with a boiling water shrinkage rate of 4.2% obtained by false twisting under the condition of a spindle rotation speed of 4000, and a cupra yarn of 84dtex54f as a hydrophilic fiber multifilament (Asahi Kasei Co., Ltd., Bemberg) (Registered trademark))) is false-twisted and opened under the condition of a spindle rotation speed of 2000 without heating, and the spread yarn is mixed with an interlace nozzle manufactured by Hebaline to form a composite yarn of 106dtex74f. Except for this, a knitted fabric of bare heavenly tissue was obtained in the same manner as in Example 1.

[Example 3]
At the time of blending, the spread hydrophilic fiber multifilament is mixed with the hydrophilic fiber multifilament by increasing the overfeed rate by 2% as compared with the hydrophobic fiber multifilament. Got

[Example 4]
As a hydrophobic fiber multifilament, 80dtex48f of polyester POY is processed by an IVF338 pin type false twister manufactured by Ishikawa Seisakusho Co., Ltd. at a processing speed of 100 m / min, a first heater temperature of 180 ° C, a second heater of 150 ° C, and a spindle rotation speed of 2600. Two-heater false twist yarn with a boiling water shrinkage rate of 3.1% obtained by false twisting under the conditions, and 44dtex45f cupra yarn (Asahi Kasei Co., Ltd., Bemberg (registered trademark)) as a hydrophilic fiber multifilament. Except for using a 100 dtex93f composite yarn, the spread yarn that was false-twisted and opened under the condition of a spindle rotation speed of 2000 without applying heat was mixed with an interlace nozzle manufactured by Hebaline. A knitted fabric of bare heavenly tissue was obtained in the same manner as in Example 1.

[Example 5]
As a hydrophobic fiber multifilament, 66dtex48f of nylon 6POY is false twisted with an IVF338 pin type false twister manufactured by Ishikawa Seisakusho Co., Ltd. under the conditions of a processing speed of 100 m / min, a first heater temperature of 130 ° C., and a spindle rotation speed of 1700. A 1-heater false twist yarn with a boiling water shrinkage rate of 3.4% and a 44dtex45f cupra yarn (Bemberg (registered trademark) manufactured by Asahi Kasei Corporation) as a hydrophilic fiber multifilament are spindles without heating. The same as in Example 1 except that the spread yarn that was false-twisted and opened under the condition of 2000 rotation speed was mixed with an interlace nozzle manufactured by Hebaline to form a composite yarn of 100 dtex93f. I got the knitted fabric of the bare heaven organization.

[Example 6]
Using the composite yarn used in Example 1, the polyester false twist yarn of 84 dtex 60f, and the spandex yarn of 22 dtex, one composite yarn and one synthetic fiber false twist yarn are alternately arranged in a 28 gauge single circular knitting machine. I got the knitted fabric of the bear heaven organization.

[Example 7]
Using the composite yarn used in Example 1 and a 22dtex spandex yarn, a knitted fabric having a milling structure was obtained with a 28-gauge double circular knitting machine.

[Example 8]
Using the composite yarn used in Example 1 and 22dtex spandex yarn, a knitted fabric having a smooth structure was obtained with a 28-gauge double circular knitting machine.

[Example 9]
As a hydrophobic fiber multifilament, 40dtex24f of polyester POY is processed by an IVF338 pin type false twister manufactured by Ishikawa Seisakusho Co., Ltd. at a processing speed of 100 m / min, a first heater temperature of 180 ° C, a second heater of 150 ° C, and a spindle rotation speed of 4000. Two-heater false twist yarn with a boiling water shrinkage rate of 3.5% obtained by false twisting under the conditions, and 110dtex75f cupra yarn as a hydrophilic fiber multifilament (Asahi Kasei Co., Ltd., Bemberg (registered trademark)) The unfolded yarn that was false-twisted and opened under the condition of a spindle rotation speed of 1400 without applying heat was mixed with an interlace nozzle manufactured by Hebaline Co., Ltd. to form a composite yarn of 132dtex99f, except that the yarn was used. A knitted fabric of a bare heavenly structure was obtained in the same manner as in Example 1.

[Example 10]
As a hydrophobic fiber multifilament, 240dtex48f of polyester POY is processed by an IVF338 pin type false twister manufactured by Ishikawa Seisakusho Co., Ltd. at a processing speed of 100 m / min, a first heater temperature of 180 ° C, a second heater of 150 ° C, and a spindle rotation speed of 2000. Two-heater false twist yarn with a boiling water shrinkage rate of 3.3% obtained by false twisting under the conditions, and cupra yarn of 33dtex30f as a hydrophilic fiber multifilament (Asahi Kasei Co., Ltd., Bemberg (registered trademark)) The unfolded yarn that was false-twisted and opened under the condition of a spindle rotation speed of 2300 without applying heat was mixed with an interlace nozzle manufactured by Hebaline Co., Ltd. to form a composite yarn of 200dtex78f, except that the yarn was used. A knitted fabric of a bare heavenly structure was obtained in the same manner as in Example 1.

[Example 11]
A bare heavenly structure knitted fabric was obtained in the same manner as in Example 1 except that 84dtex24f viscose rayon yarn (abbreviated as Ry in the table) was used as the hydrophilic fiber multifilament.

[Example 12]
A knitted fabric of bare heaven structure was obtained in the same manner as in Example 1 except that 84 dtex50f lyocell yarn (abbreviated as Ly in Table 1 below) was used as the hydrophilic fiber multifilament.

[Example 13]
A bare heavenly structure knitted fabric was obtained in the same manner as in Example 1 except that 84 dtex21f diacetate yarn (abbreviated as CDA in Table 1 below) was used as the hydrophilic fiber multifilament.

[Comparative Example 1]
As a hydrophobic fiber multifilament, 40dtex24f of polyester POY is processed by an IVF338 pin type false twister manufactured by Ishikawa Seisakusho Co., Ltd. at a processing speed of 100 m / min, a first heater temperature of 180 ° C, a second heater of 150 ° C, and a spindle rotation speed of 4000. Two-heater false twist yarn with a boiling water shrinkage rate of 3.5% obtained by false twisting under the conditions, and cupra yarn of 84dtex54f as a hydrophilic fiber multifilament (Bemberg (registered trademark) manufactured by Asahi Kasei Co., Ltd.) The fibers are mixed with an interlace nozzle manufactured by Hebaline Co., Ltd. to form a composite yarn of 106dtex78f, and the hydrophilic fiber multifilament is on the core side when the fiber is mixed. A knitted fabric of bare heaven structure was obtained in the same manner as in Example 1 except that the 5% overfeed rate was lowered and the fibers were mixed.

[Comparative Example 2]
As a hydrophilic fiber multifilament, 84dtex54f cupra yarn (manufactured by Asahi Kasei Corporation, Bemberg (registered trademark)) is used as it is without opening, and the knitted fabric of the bare heaven structure is the same as in Example 1. Got

[Comparative Example 3]
22dtex24f of polyester FDY having a boiling water shrinkage rate of 3.0% as a hydrophobic fiber multifilament and 84dtex54f cupra yarn (Asahi Kasei Co., Ltd., Bemberg (registered trademark)) as a hydrophilic multifilament are interlaced by Hebaline. After mixing with a nozzle, the IVF 338 pin type false twister manufactured by Ishikawa Seisakusho Co., Ltd. is used for simultaneous provision under the conditions of processing speed 100 m / min, first heater temperature 180 ° C, second heater 150 ° C, and spindle rotation speed 2000. A knitted fabric having a bare sky structure was obtained in the same manner as in Example 1 except that the composite yarn was twisted to obtain 106 dtex78f composite yarn.

[Comparative Example 4]
As a hydrophobic fiber multifilament, 40dtex24f of polyester POY is processed by an IVF338 pin type false twister manufactured by Ishikawa Seisakusho Co., Ltd. at a processing speed of 100 m / min, a first heater temperature of 180 ° C, a second heater of 150 ° C, and a spindle rotation speed of 4000. 22dtex24f 2-heater false twisted yarn obtained by false twisting under the conditions and having a boiling water shrinkage rate of 3.5%, and 84dtex54f cupra yarn as a hydrophilic fiber multifilament (Asahi Kasei Co., Ltd., Bemberg (registered trademark) )) While aligning, a knitted fabric of bare heaven structure was obtained with a 28 gauge single circular knitting machine together with 22dtex spandex yarn. Subsequent processing and the like were carried out in the same manner as in Example 1.

[Comparative Example 5]
As a hydrophobic fiber multifilament, 40dtex24f of polyester POY is processed by an IVF338 pin type false twister manufactured by Ishikawa Seisakusho Co., Ltd. at a processing speed of 100 m / min, a first heater temperature of 180 ° C, a second heater of 150 ° C, and a spindle speed of 4000. A cupra yarn of 84dtex54f (manufactured by Asahi Kasei Co., Ltd., Bemberg) as a hydrophilic fiber multifilament with a 22dtex24f 2-heater false twisting yarn having a boiling water shrinkage rate of 3.5% obtained by false twisting under the conditions on the core side. (Registered Trademark)) was single-covered on the sheath side to obtain an SCY (single-covered yarn) 110dtex78f having a sheath-core structure, and a knitted fabric having a bare heavenly structure was obtained in the same manner as in Example 1.

[Comparative Example 6]
As a hydrophobic fiber multifilament, 40dtex24f of polyester POY is processed by an IVF338 pin type false twister manufactured by Ishikawa Seisakusho Co., Ltd. at a processing speed of 100 m / min, a first heater temperature of 180 ° C, a second heater of 150 ° C, and a spindle rotation speed of 4000. A cupra yarn of 44dtex45f (manufactured by Asahi Kasei Co., Ltd., Bemberg) as a hydrophilic fiber multifilament with a 22dtex24f 2-heater false twisting yarn having a boiling water shrinkage ratio of 3.5% obtained by false twisting under the conditions on the core side. (Registered Trademark)) was double-covered on the sheath side to obtain a DCY (double-covered yarn) 119dtex114f having a sheath-core structure, and a knitted fabric having a bare heavenly structure was obtained in the same manner as in Example 1.

[Comparative Example 7]
As a hydrophobic fiber multifilament, MVS (Murata Machinery Co., Ltd.) so that 33dtex24f of polyester DTY is on the core side and Bemberg short fiber (manufactured by Asahi Kasei Corporation, 1.4dtex × 38 mm long short fiber wadding) on the sheath side. : A bare heavenly knitted fabric was obtained in the same manner as in Example 1 except that a 60-count long-short composite yarn was obtained using Murata-Voltex-Spinner).
The evaluation results of the composite yarns and knitted fabrics of the above Examples and Comparative Examples are shown in Table 1 below.

The knitted fabric using the composite yarn according to the present invention has good quick-drying property despite the use of highly water-retaining hydrophilic fibers, so that the fabric feels sticky after sweating and the fabric becomes sticky. There is no discomfort that sticks to the skin. In addition, since the hydrophilic fibers are in the outermost layer, the contact with the skin is smooth and the touch is excellent, the skin irritation is low, and the cool contact feeling is high. Further, in a high temperature and high humidity environment such as summer, the insensitive evaporation generated from the body can be appropriately treated by the hygroscopicity and desorption of hydrophilic fibers, so that the fabric is less stuffy and has a high overall refreshing property. In addition, the knitted fabric according to the present invention has excellent elasticity and slipperiness, so that it is comfortable to wear without a feeling of restraint when worn, and clothing such as innerwear, socks, pajamas, and sports underwear that comes into direct contact with the skin. It can be suitably used as a material suitable for applications such as bedding.

Claims

A composite yarn containing a hydrophilic fiber multifilament and a hydrophobic fiber multifilament, wherein the following formula (1):
Openness = L / {R × √ (F)} ・・・ (1)
{In the formula, R is the equivalent circle diameter of the single yarn of the hydrophilic fiber multifilament, F is the number of single yarns of the hydrophilic fiber multifilament, and L is the hydrophilic fiber in the cross section of the composite yarn. The maximum distance between the outermost layer of the dispersion region (SC) of the single yarn of the multifilament and the outermost layer of the dispersion region (SG) of the hydrophobic fiber multifilament. } Is less than 1.0.
The following equation (3):
Ratio of hydrophilic fibers in SG (%) = {Amount of hydrophilic fibers in SG / (Total fineness of hydrophobic fiber multifilament + Amount of hydrophilic fibers in SG)} x 100 ... (3)
{In the formula, the amount of hydrophilic fibers in SG is the following formula (2):
Amount of hydrophilic fibers in SG = (number of single threads of hydrophilic fiber multifilaments in SG / total number of single threads of hydrophilic fiber multifilaments) x total fineness of hydrophilic fiber multifilaments ... (2)
It is represented by. } The proportion of hydrophilic fibers in SG is 20% or less; and the following formula (4):
Percentage of the area (S) where SG and SC overlap in SG = (area of S / area of SG) × 100 ... (4)
The proportion of S in the more sought after SG is 80% or more;
A composite thread characterized by that.
The composite yarn according to claim 1, wherein the proportion of hydrophilic fibers in the SG is 10% or less.
The following (a) to (d):
(a) The mixing ratio of the hydrophilic fiber multifilament in the composite yarn is 20 to 80 wt%;
(b) The total fineness of the composite yarn is 44 to 333 dtex;
(c) The single yarn fineness of the hydrophilic fiber multifilament is 0.1 to 5.6 dtex; and (d) the single yarn fineness of the hydrophobic fiber multifilament is 0.1 to 5.6 dtex;
The composite yarn according to claim 1 or 2, which satisfies the above conditions.
The composite yarn according to any one of claims 1 to 3, wherein the hydrophilic fiber is a cellulose fiber.
The composite yarn according to any one of claims 1 to 4, wherein the hydrophobic fiber is a synthetic fiber.
A knitted fabric containing the composite yarn according to any one of claims 1 to 5.
The knitted fabric according to claim 6, wherein the basis weight is 80 to 200 g / m 2 , and the residual moisture content 1 hour after dropping 0.3 ml of water is within 30%.
The knitted fabric according to claim 6 or 7, which has one or more knitting structures of tenjiku, milling, and smooth.
A method for producing a composite yarn containing a hydrophilic fiber multifilament and a hydrophobic fiber multifilament. The hydrophilic fiber multifilament is opened on the sheath side after the hydrophilic fiber multifilament is opened. As described above, a method for producing a composite yarn, which comprises mixing a hydrophilic fiber multifilament and a hydrophobic fiber multifilament.
The manufacturing method according to claim 9, wherein the method for opening the hydrophilic fiber multifilament is false twisting.
The production method according to claim 9 or 10, wherein when the hydrophilic fiber multifilament and the hydrophobic fiber multifilament are combined, the feed amount of the hydrophilic fiber multifilament is larger than the feed amount of the hydrophobic fiber multifilament. ..
The following (a) to (d):
(a) The mixing ratio of the hydrophilic fiber multifilament in the composite yarn is 20 to 80 wt%;
(b) The total fineness of the composite yarn is 44 to 333 dtex;
(c) The single yarn fineness of the hydrophilic fiber multifilament is 0.1 to 5.6 dtex; and (d) The single yarn fineness of the hydrophobic fiber multifilament is 0.1 to 5.6 dtex;
The production method according to any one of claims 9 to 11, which satisfies the above conditions.
The production method according to any one of claims 9 to 12, wherein the hydrophobic fiber multifilament before compositing has a boiling water shrinkage rate of 3% or more.
The production method according to any one of claims 9 to 13, wherein the hydrophilic fiber multifilament is a cellulose fiber.
The production method according to any one of claims 9 to 14, wherein the hydrophobic fiber multifilament is a synthetic fiber.