JP6630556B2 - Circular knitted fabric for cellulose blending - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a circular knitted fabric containing a fiber that stretches by water absorption and an elastic yarn. More specifically, the present invention relates to a thin cellulose mixed circular knitted fabric that is cool when worn and comfortable when sweating.

In conventional clothing, when sweating due to exercise such as sports, the fabric absorbs sweat, and the skin and the fabric come into close contact with each other, giving a so-called sticky feeling and a stuffy feeling. In order to prevent this, various fabrics have been developed. For example, Patent Document 1 below proposes a method of making the fabric uneven by using fibers that self-elongate when absorbing sweat. Clothes that adhere to the body using are not effective in eliminating stickiness and stuffiness.
Therefore, Patent Literature 2 below discloses that a circular knitted fabric using a composite yarn and an elastic yarn using a cellulose fiber that expands and absorbs water can eliminate stickiness and stuffiness even when sweating. Although a comfortable garment can be manufactured by this, the knitted fabric disclosed in Patent Document 2 is a thick knitted fabric using a composite yarn having a large fineness as can be seen from the examples. Yes, it is not suitable for clothing that fits the body and requires coolness when worn.
Therefore, there is still a need to provide a comfortable thin knit fabric.

JP 2005-36374 A JP 2009-35846 A

  In view of the background art described above, an object to be solved by the present invention is to provide a thin knitted fabric that is cool when worn, has improved air permeability when sweating, and has no sticky feeling or stuffy feeling.

  The present inventor has conducted intensive studies and repeated experiments in order to solve the above-mentioned problems. As a result, in particular, in a knitted fabric for clothes that fits the body with a thin (thin fabric) suitable for inner products and leg products, the fabric self-stretches when absorbing water. This problem is solved by using a water-absorbing stretched yarn (specific composite yarn) and an elastic yarn, knitting the composite yarn in a specific loop structure, and setting the rate of improvement in air permeability during perspiration to a specific range. This has led to the completion of the present invention.

That is, the present invention is as follows.
[1] A course of a water-absorptive composite yarn having a fineness of 50 to 100 dt and a water-absorptive elongation ratio of 4% to 10% containing a cellulose fiber as a water-absorptive yarn and a non-water-absorptive yarn, and a course containing an elastic yarn In a circular knitted fabric mixed with cellulose having a basis weight of 170 g / m ² or less alternately knitted, the knit loop composed of the water-absorbing stretched composite yarn has the following formula (1):
Loop ratio = length of needle loop / length of sinker loop. . . Equation (1)
Wherein the loop ratio determined by the above is from 3.5 to 4.5, and the circular knitted fabric has a rate of improvement of ventilation when wet of 10% or more.
[2] In the above-described water-absorbent stretch composite yarn, the following formula (2) when dried:
Yarn length difference = Yarn length of non-water-absorbing elongated yarn / Yarn length of water-absorbing elongated yarn. . . Equation (2)
The circular knitted fabric mixed with cellulose according to the above [1], wherein the difference in yarn length between the water-absorbed stretched yarn and the non-water-absorbent stretched yarn is 1.03 to 1.1.10.
[3] The circular knitted fabric containing cellulose according to [1] or [2], wherein all of the water-absorbing stretch composite yarns are knitted in a knit structure.

  The circular knitted fabric mixed with cellulose of the present invention is a thin fabric, is cool when worn, and has improved breathability when sweating, and is a knitted fabric with no sticky feeling or stuffy feeling, so that sportswear, camisole, bra top, underwear It can be suitably used in the production of various types of clothes such as inners, tights, leg goods such as girdles, and outerwear.

A photograph that replaces the drawing for determining the loop ratio.

Hereinafter, embodiments of the present invention will be described in detail.
As described above, an object of the present invention is to provide a knitted fabric that is comfortable when worn and sweats even with thin (thin) inner and leg products. With conventional thin clothing, the temperature inside the clothing rises due to exercise, and if you continue exercising, you eventually sweat and the clothing absorbs sweat, but the heat inside the clothing is somewhat thin, so heat is radiated out of the clothing. Although he progressed, he was sweating more and more with discomfort because the heat was still in the clothes.

  In order to make the material comfortable when sweating, it is necessary to design the knitted fabric so that the rate of improvement of the ventilation when wet is within an appropriate range for the purpose of absorbing the sweat and further improving the permeability of the knitted fabric. It becomes important. Accordingly, the present inventors have conducted intensive studies and found that if the rate of improvement of ventilation when wet is 10% or more, sweat is absorbed at the time of sweating, the loop of the knitted fabric is increased, and the air permeability is improved, and the heat in the clothes is reduced. I found it comfortable to escape. The means for achieving this will be described below. When the rate of improvement of ventilation when wet is less than 10%, there is not much comfort when sweating, and preferably the rate of improvement of ventilation when wet is 15% or more.

The cellulose-mixed circular knitted fabric of this embodiment contains a cellulose fiber as a water-absorbing stretched yarn and a non-water-absorbing stretched yarn, a course of a water-absorbing stretched composite yarn having a fineness of 50 to 100 dt and a water-absorbing extension ratio of 4% to 10%. And a course containing an elastic yarn are alternately knitted, and a cellulose-mixed circular knitted fabric having a basis weight of 170 g / m ² or less, preferably a basis weight of 150 g / m ² or less. Pantyhose knitting machine with a kettle diameter of about 10 inches, body size circular knitting machine with a kettle diameter of 12 to 18 inches, or a circular knitted fabric that can be manufactured by a circular knitting machine with a diameter of 30 to 38 inches, preferably It is a circular knitted fabric with a single structure.

  The water-absorbing stretch composite yarn is a composite yarn of a cellulose fiber that expands and absorbs water and a non-water-absorbing stretch yarn that hardly stretches when absorbing water.The cellulose fiber that expands and absorbs water is obtained by alkali-treating cupra, rayon, purified cellulose, and bamboo fiber. Cellulose fibers, preferably regenerated cellulose. As the non-water-absorbing stretched yarn, polyester fibers such as polyester, polytrimethylene terephthalate, polyamide fibers, acetate, cotton, wool, and any other long fibers or short fibers; Any of the yarns can be used. Regarding the cross-sectional shape, in addition to the round cross-section, to impart water absorption at the time of sweating during exercise or the like, to improve the appearance aesthetics, texture, etc. Furthermore, additives such as a substance having excellent hygroscopicity and a substance which imparts transparency and cooling sensation can be mixed in the non-water-absorbing stretched yarn.

  The water-absorbing stretch composite yarn can be manufactured by using a false twisting machine, an air jet processing machine, or a twining machine that combines two or more types of yarns. A composite yarn having a high water-absorbing elongation is obtained.For example, a non-water-absorbing stretch yarn such as polyester or nylon is false-twisted, and then, or a method of air-entanglement with cellulose during the false-twisting process. After false-twisting both the yarn and the cellulose, a method of performing air entanglement in some cases, or a false-twisted non-water-absorbing stretched yarn, or a non-water-absorbing stretched yarn of the original yarn is subjected only to cellulose and air entanglement to form a composite yarn It is also possible. However, in the case of a composite yarn, the extension of the composite yarn during water absorption may not be remarkably obtained depending on the composite conditions. It is possible to make the composite yarn after the alkali treatment have a water absorption elongation of 4% or more.

In the design of the composite yarn, the following formula (2) when dried in an environment of 20 ° C. and 65% RH:
Yarn length difference = Thread length of non-water-absorbing stretched yarn / Thread length of cellulose fiber (water-absorbing stretched yarn). . . Equation (2)
Calculate the yarn length difference by rounding off the third digit after the decimal point according to the above formula. At the stage of forming the cellulose-mixed circular knitted fabric, that is, in consideration of the yarn shrinkage due to dyeing or alkali treatment, the cellulose is adjusted so that the difference in yarn length between the water-absorbed stretched yarn and the non-water-absorbed stretched yarn is 1.03 to 1.10. The feed amounts of the fiber (water-absorbing stretched yarn) and the non-water-absorbing stretched yarn are set.

  The yarn length difference of a composite yarn using ordinary cellulose fibers is about -0.05 to 1.02, and there is also a disclosure of a composite yarn shown in Patent Document 2, but it contains alkali-treated cellulose. The yarn length difference of the high-fineness composite yarn used for thick fabrics is 1.10 or more, and even if a thick non-water-absorbing yarn is used, the yarn length must be 1.10 or more to efficiently absorb and extend as a composite yarn. A difference is needed. However, this embodiment is a composite yarn having a low fineness because it is aimed at a thin circular knitted fabric. In this case, if the yarn length difference is less than 1.03, the composite yarn lacks water absorption and elongation, and the knitted fabric has a poor ventilation. The effect of improving the performance is small and comfortable clothing is not obtained. Further, when the yarn length difference is larger than 1.10, when the composite yarn is dry, a large force such as elongation is applied to the cellulose fiber constituting the composite yarn, and unlike the composite yarn used for thick fabric, the cellulose fiber has It is easy to cut, resulting in product defects. Therefore, the yarn length difference between the non-water-absorbing stretched yarn and the cellulose fiber is designed to be 1.03 to 1.10.

When measuring the yarn length difference between the composite yarns, first, mark the yarn length of the composite yarn under a load of 0.1 g / dt, for example, between 30 cm. When the cellulose fiber and the non-water-absorbing stretched yarn can be separated, a load of 0.1 g / dt is applied to each of the fibers after the fiber separation, and the length between the marks attached in the composite yarn state is set to the cellulose fiber and the non-water-absorbing stretched yarn. Are read separately to determine the respective yarn lengths.
If the entanglement between the cellulose fiber and the non-water-absorbing stretched yarn is too strong to separate from the conjugate yarn, first, mark the yarn length of the conjugate yarn under a load of 0.1 g / dt, for example, between 30 cm. (A). Next, only the cellulose fiber at the middle of the entangled portion and the entangled portion of the cellulose fiber and the non-water-absorbing stretched yarn is cut, and all the marks between the marks attached with the composite yarn are similarly cut. The length between the marks first applied to the composite yarn obtained by cutting the cellulose under the load is measured and defined as the length (B) of the non-water-absorbing elongated yarn. After measuring these lengths, the yarn length of the cellulose fiber and the non-water-absorbing stretched yarn is calculated by the following formula:
Yarn length of cellulose fiber ··· (A) length Yarn length of non-water-absorbing elongated yarn ··· (B) length

  In addition, the fineness of the water-absorbent stretch composite yarn is set to 50 to 100 dt (decitex: the same symbols are used hereinafter), and the fineness of the cellulose water-absorbent stretch yarn and the non-water-absorbent stretch yarn may be considered in this range. When the fineness of the water-absorbent stretch composite yarn is less than 50 dt, the knitted fabric cannot be put to practical use in terms of the strength of the knitted fabric, such as the bursting strength of a knitted fabric. There is a possibility that the garment becomes thick and lacks a refreshing feeling. Therefore, the fineness of the water-absorbing stretch composite yarn is 50 to 100 dt, preferably 55 to 90 dt.

  The water-absorbable stretch composite yarn used for the cellulose-mixed circular knitted fabric of the present embodiment is obtained by combining a water-absorbable stretch cellulose fiber and a non-water-absorbent stretch yarn. The water-absorbing elongation of ordinary cellulose fibers is 3% or less. However, when the composite yarn is made to have a water-absorbing elongation of 4% or more, the cellulose fiber also has a water-absorbing elongation of 4% or more. You need to do that. Generally, a method of increasing the water absorption elongation of a cellulose fiber having a water absorption elongation of 3% or less is disclosed in Japanese Patent No. 5102045, for example, by using sodium hydroxide in an aqueous solution of 20 g / L (liter) or more. It is obtained by immersion treatment in water at 20 ° C. or more for 5 minutes or more. The water absorption elongation can be controlled by these conditions. The weaker the processing conditions such as alkali concentration, temperature, and time, the lower the water absorption elongation. However, even if the processing conditions are too severe, the water absorption elongation exceeds a certain limit. Cannot be obtained. As the alkali treating agent, known agents can be used. For example, alkali metal hydroxides such as sodium hydroxide and potassium hydroxide can be used.

  The alkali concentration is more preferably equivalent to a 20 to 200 g / L aqueous solution, and the treatment is preferably performed at a treatment temperature and time of 20 to 110 ° C. for 5 to 120 minutes. In addition, the alkali treatment is performed in a state of a cellulose fiber, a method of dyeing after knitting a knitted fabric by combining with a non-water-absorbing stretched yarn, or a method of manufacturing a composite yarn using a cellulose fiber before the alkali treatment. Any method may be used, such as performing an alkali treatment after manufacturing a knitted fabric using the composite yarn and subsequently performing a dyeing process, but it is easier to perform the process after manufacturing the knitted fabric.

The water-absorbing elongation of the composite yarn was measured by measuring the composite yarn length (A) under an environment of 20 ° C. and 65% RH under a load of 0.1 g / dt (decitex), and then immersing the composite yarn in water. The length (B) after 1 minute was measured under a load of 0.1 g / dt, and the following formula (3):
Water absorption elongation (%) = {(BA) / A} × 100. . . Equation (3)
The water absorption elongation is determined by rounding off the decimal places. In addition, the water absorption elongation percentage of the water-absorbing stretch composite yarn in the knitted fabric is measured under the same conditions by extracting the composite yarn from the fabric.

  The higher the water absorption elongation rate of the water-absorbing and expanding composite yarn is, the more the yarn absorbs (absorbs sweat) during sweating during exercise, etc., and the knit loop expands and becomes larger. Clothes. If the water-absorbing elongation rate of the composite yarn is less than 4%, the expansion of the knit loop due to the water absorption during exercise is small, the air permeability is little improved, and the stuffy feeling cannot be eliminated. On the other hand, when the water-absorbing elongation of the composite yarn is greater than 10%, the knit loops are excessively widened at the time of water absorption, and irregularities occur at the portion where the water is absorbed and at the portion where the water is not absorbed, resulting in a poorly aesthetic garment. Therefore, alkali treatment conditions of cellulose fibers and yarn length design of the composite yarn are appropriately performed so that the water absorption elongation of the composite yarn is 4% or more, preferably 5 to 8%.

  The elastic yarn is a fiber having a breaking elongation of 100% or more as measured by a JIS L 1013-1998 elongation standard test, and is, for example, a polyurethane fiber, a polybutylene terephthalate fiber, or the like, and preferably a polyurethane fiber. .

The course containing the water-absorbing stretch composite yarn refers to a course composed of only the water-absorbing stretch composite yarn having a water absorption elongation ratio of 4% to 10%, and the course containing the elastic yarn refers to an elastic yarn and a non-water-absorbing stretch yarn. Is a course in which non-water-absorbing elongated yarn and elastic yarn are plated (attached yarn knitting), or a single yarn in which a non-water-absorbing elongated yarn and elastic yarn are twisted, and the elastic yarn is covered with a non-water-absorbing elongated yarn. This is a course containing elastic yarn such as covering yarn and double covering. In addition, the course containing the elastic yarn is preferably a fiber having excellent water absorption so that it is comfortable even when sweating due to exercise or the like. It is preferable that the processing to be applied is processed.
Furthermore, in the course containing the elastic yarn, the fineness of the elastic yarn and the fineness of the non-water-absorbing stretched yarn may be any combination, but the fineness of the non-water-absorbent stretched yarn is 50 to 90 dt in order to aim at a thin knitted fabric. The fineness of the yarn is preferably 15 to 60 dt, and the total fineness of the elastic yarn and the non-water-absorbing stretched yarn is preferably 50 to 120 dt.

  The cellulose-mixed circular knitted fabric of the present embodiment is a circular knitted fabric containing a water-absorbent stretched composite yarn and an elastic yarn, and a knitting is performed by adjoining a course containing a water-absorbent stretchable composite yarn and a course containing an elastic yarn. It is characterized by having a part which is. Specifically, it is preferable that a course containing the water-absorbing stretch composite yarn and a course containing the elasticity are alternately knitted, and the upper and lower courses of the water-absorbing stretch composite yarn are the courses containing the elastic yarn.

  As for the knitting structure of the cellulose-mixed circular knitted fabric, any structure such as an all knit, a combination of a knit and a tack, and a combination of a knit and a mistake can be used. A knit, i.e. single sheeting, is preferred.

In order to improve the air permeability by stretching the water-absorbing and expanding composite yarn even when absorbing water even on thin fabric, the ratio of the length of the needle loop to the length of the sinker loop of the knit loop formed by the water-absorbing and expanding composite yarn is important. That is, the following formula (1) under an environment of 20 ° C. and 65% RH:
Loop ratio = length of needle loop / length of sinker loop. . . Equation (1)
It is necessary to set the loop ratio obtained by the above to 3.5 to 4.5. In the formula for calculating the loop ratio, the value is calculated by rounding off the second digit after the decimal point.

  The loop ratio of a normal knitted fabric is about 2.0 to 3.0, and the fineness of the yarn used, the gauge of the knitting machine, the amount of lowering of the lowering cam of the knitting machine are appropriately set, and the needle loop and the sinker loop are Although it is formed in a well-balanced manner and has excellent morphological stability, in the present embodiment, the knitting and finishing are performed so as to be in a range in which the balance is broken, and the length of the needle loop is increased so that the water-absorbing and expanding composite yarn is formed. When water is stretched by absorbing water, it is set so that a needle loop having a high air permeability improving effect is easily stretched. In order to set such a balance of the needle loop, a method of increasing the lowering amount of the lowering cam at the time of knitting to increase the needle loop, or a slightly increasing amount of the lowering cam at the time of knitting, and at the time of dyeing processing There is a method of setting the process conditions so as to achieve the dragging. In this drawing, for example, a liquid jet dyeing machine may be used at the time of dyeing to increase the liquid flow rate, or conditions may be set such that the drawing is performed at the time of heat setting. This causes the sinker loop to be shortened by pulling on the needle loop, resulting in a relatively longer needle loop. The loop ratio may be designed to be 3.5 to 4.5 by these methods. If the loop ratio is less than 3.5, the water-absorbing elongation effect is not exhibited, and the effect of improving ventilation when wet is small, and if the loop ratio is more than 4.5, the water-absorbing elongation function of the water-absorbing extended composite yarn is exhibited. Although the needle loop is easily elongated, the loop is too elongated, and the ventilation when wet is reduced on the contrary, the loop balance is considerably disturbed, and washing shrinkage and knitted fabric deformation are unfavorably caused.

  The loop ratio is obtained by elongating the knitted fabric by 50% and weft by 50%, and measuring the length of the loop at that time separately for the needle loop and the sinker loop. A specific measurement example will be described with reference to FIG. As the length of the needle loop, the lengths (1) and (2) where the loop of the water-absorbing and expanding composite yarn intersects the needle loop containing the elastic yarn of the previous course are measured. As the length of the sinker loop, the length (2) to (3) at which the water-absorbent stretch composite yarn intersects the needle loop containing the elastic yarn of the previous course is measured. Then, the loop ratio is obtained by the above equation (1). Here, in order to facilitate the measurement of the length of the loop, it is preferable that the length is enlarged by a microscope or the like and determined by image analysis. In this case, the loop length is approximately the center of the width (fiber diameter) of the fiber of the water-absorbing stretched composite yarn. Measure in parts.

  As a method of dyeing a circular knitted fabric mixed with cellulose, a normal dyeing finishing step can be used, and a dyeing machine to be used is also a cheese dyeing machine for a composite yarn when a cellulose fiber of a water-absorbing stretched composite yarn is alkali-treated in a fiber state. The treatment is performed using a skein dyeing machine, and the alkali treatment is processed into a knitted fabric state, and any dyeing machine such as a jet dyeing machine or a wins dyeing machine can be used. It is preferable that the knitted fabric after the alkali treatment is dyed under dyeing conditions according to the fiber material. In the processing in the knitted fabric state, in the finishing set, the water-absorbing stretched yarn having a water-absorbing elongation of 4% to 10% after the finishing set may be finished so as not to wrinkle or stretch. Further, it is preferable to add a water absorbing agent as a finishing agent, because the sweat absorbing property is further improved.

Hereinafter, the present invention will be specifically described with reference to examples. Of course, the present invention is not limited to this.
The following evaluation methods were used in the examples.
(1) Permeability improvement rate at the time of moistening In a constant temperature / humidity room at 20 ° C. × 65% RH, samples were collected on a sample table to a size of 15 cm × 15 cm using a KES-F8-AP1 air permeability tester manufactured by Kato Tech Co., Ltd. A sample is placed, a constant flow rate air is sent to the sample by piston movement of the plunger / cylinder, and a pressure drop by the sample is measured within 10 seconds in one cycle in a mechanism for discharging and sucking the sample into the atmosphere. The value was determined as the airflow resistance value (A) when the sample was dried. Then, 50% of the sample weight was absorbed in water to measure the airflow resistance (B) at the time of water absorption, and the following formula (4):
Aeration improvement rate when wet (%) = ((AB) / A) × 100. . . Equation (4)
The value after the decimal point was rounded off to obtain the ventilation improvement rate. The larger the value of the ventilation improvement ratio is + (plus), the more excellent the air permeability is. When the airflow resistance increases in (A) <(B), it is indicated by-(minus).

(2) Distortion of the knitted fabric The deformation of the knitted fabric at the time of water absorption is evaluated by placing the knitted fabric on a desk and dripping 0.1 cc of water drops to evaluate the degree of unevenness of the knitted fabric according to the following criteria. It was determined that Δ was not out of shape.
：: No unevenness occurs on the knitted fabric.
Δ: The unevenness is slightly generated on the knitted fabric, but the appearance is not deteriorated.
×: Unevenness occurs on the knitted fabric, and the appearance is not good.

(3) Wearing feeling Using the circular knitted fabric manufactured in the example, a short-sleeved shirt that fits the body was sewn, and jogging was performed at 6 km / min for 15 minutes by a treadmill under an environment of 28 ° C. and 50% RH. Thereafter, the subject was rested for 10 minutes, and the feeling of comfort at rest for 10 minutes was subjectively evaluated based on the following criteria.
: Sweated but comfortable.
Δ: After exercising, there is a slight stuffiness but comfortable.
×: Unpleasant due to stuffiness.

[Example 1]
In producing a water-absorbing stretch composite yarn using an alkali-untreated cupra 33dt / 24f and a nylon 44dt / 34f full-dal yarn, the nylon full dull 44dt / 34f is processed with a Mach 33H nip belt type false twisting machine manufactured by TMT Machinery. After processing at a speed of 300 m / min, a first heater temperature of 180 ° C., a twister belt angle of 95 °, and a feed rate of + 3%, before feeding into the second heater, the feed rate of the nylon yarn + 10% and the feed rate of the cupra fiber were − 1% was used for interlacing with an interlace nozzle MK-2 manufactured by Awa Spindle Co., Ltd. under the condition of 80 nozzles / m, and thereafter, the second heater was processed at 200 ° C. to obtain a composite yarn.
When knitting a circular knitted fabric using the manufactured composite yarn, the circular knitting machine knits a jersey structure using a single circular knitting machine having a diameter of 28 G and a pot diameter of 34 inches. Nylon full dull 44 dt / 34 f and polyurethane fiber 17 dt (trade name: Leica BZ: manufactured by Asahi Kasei Fibers Co., Ltd.) are knitted alternately with a course containing composite yarn by drawing and knitting with a draft ratio of polyurethane fiber of 2.8. did. At this time, knitting was performed with the lowering amount of the lowering cam of the yarn feeder supplying the composite yarn to the knitting machine being about 3% larger than usual.
The knitted greige is refined, stretched to the extent that wrinkles of the knitted fabric can be removed with a pin tenter, and preset at 190 ° C for 60 seconds. Thereafter, sodium hydroxide was alkali-treated at a concentration of 50 g / L at 40 ° C. for 20 minutes to obtain a composite yarn as a water-absorbed elongated composite yarn. Next, only the nylon side is dyed at 100 ° C., and since the knitted fabric after dyeing has an uneven shape, it is dried using a short loop drier and then stretched to an extent that wrinkles of the knitted fabric can be removed with a pin tenter. The finishing set was performed at 170 ° C. for 60 seconds. In addition, a water absorbing agent was applied simultaneously with the dyeing in the jet dyeing.
The obtained circular knitted fabric had a basis weight of 139 g / m ² , the water-absorbing stretch composite yarn in the knitted fabric was taken out, and the water-absorbing elongation was measured. As a result, it was 6.4%. Was evaluated. The results are shown in Table 1 below.

[Examples 2 to 7, Comparative Examples 1 to 3]
In Example 1, when the composite yarn was manufactured, the feed rate of the nylon yarn fed to the second heater was changed to increase the feed rate of the composite yarn (Example 2) and to decrease the feed rate of the composite yarn (Example 2). 3) Alternatively, a knitted fabric in which the loop ratio is increased by setting the feed amount of the knitted fabric at the time of presetting to a minus feed (Example 4, Comparative Example 1), and the lowering amount of the lowering cam during knitting is set to a normal range. The knitted fabric feeding amount at the time of setting was + 5%, the knitted fabric having a small loop ratio (Example 5, Comparative Example 2), the cellulose fiber or the nylon yarn was changed, and the fineness of the water-absorbing stretch composite yarn was changed. A knitted fabric using a composite yarn (Examples 6 and 7) and a composite yarn manufactured at a nylon yarn feed rate of + 3% during the manufacture of the composite yarn (Comparative Example 3). A circular knitted fabric was manufactured in the same manner It was evaluated a wet ventilation improvement rate and the like of the circular knitted fabric. The evaluation results are shown in Table 1 below.

Example 8
The alkali-untreated cupra 33dt / 24f and the polyester 56dt / 34f full-dal yarn processed yarn were converted to polyester using an interlace nozzle MK-2 manufactured by Awa Spindle Co., Ltd., a Mach 33H nip belt type false twisting machine manufactured by TMT Machinery. At the feed rate of 8%, the feed rate of the cupra fiber was 0%, and only the confounding was performed under the condition of the number of confounds of 100 / m, to obtain a composite yarn. Using the obtained composite yarn to knit a sheet-laying fabric using a 28-gauge single circular knitting machine having a 14-inch body diameter, a composite yarn and a polyurethane fiber 22 dt (trade name: Leica CR: Asahi Kasei Fibers (Manufactured by K.K.) and alternately knitted with SCY wound with a polyester 56 dt / 34 f full-dull yarn at 800 T / m and a draft rate of 2.8 to obtain a knitted fabric with a length of a shirt. At this time, the lowering amount of the lowering cam of the yarn feeder of the composite yarn was increased by about 7% than usual, and the knitting was performed by making the needle loop larger than usual. After the obtained greige was steamed at 100 ° C. for 30 minutes in an autoclave, scouring and dyeing of polyester and cupra were performed with a high-pressure paddle dyeing machine, and as a finish, steam setting was performed at 110 ° C. for 30 seconds in a body size mold. . In addition, a water absorbing agent was applied simultaneously with dyeing in a paddle dyeing machine.
The weight of the obtained circular knitted fabric was 154 g / m ² , the water-absorbing stretch composite yarn was extracted from the knitted fabric, and the water-absorbing elongation was measured. As a result, it was 5.3%. Was evaluated. The results are shown in Table 1 below.

  The circular knitted fabric mixed with cellulose of the present invention is a thin fabric, is cool when worn, and has improved breathability when sweating, and is a knitted fabric with no sticky feeling or stuffy feeling, so that sportswear, camisole, bra top, underwear And the like, and can be suitably used in the production of various types of clothes such as inners, tights, leg goods such as girdle, and outerwear.

1-3 Intersection between the loop of the water-absorbent stretch composite yarn and the needle loop of the course containing the elastic yarn 4 Needle loop 5 Sinker loop

Claims (3)

A course of a water-absorbing stretch composite yarn having a fineness of 50 to 100 dt and a water-absorbing extension ratio of 4% to 10% containing a cellulose fiber as a water-absorbing stretch yarn and a non-water-absorbing stretch yarn, and a course containing an elastic yarn, In a circular knitted fabric mixed with cellulose having a basis weight of 170 g / m ² or less alternately knitted, the knit loop composed of the water-absorbing stretch composite yarn has the following formula (1):
Loop ratio = length of needle loop / length of sinker loop. . . Equation (1)
Wherein the loop ratio determined by the above is from 3.5 to 4.5, and the circular knitted fabric has a rate of improvement of ventilation when wet of 10% or more. In the above-mentioned water-absorbent stretched composite yarn, the following formula (2) when dried:
Yarn length difference = Yarn length of non-water-absorbing elongated yarn / Yarn length of water-absorbing elongated yarn. . . Equation (2)
The cellulose-mixed circular knitted fabric according to claim 1, wherein the yarn length difference between the water-absorbed stretched yarn and the non-water-absorbent stretched yarn, determined by the formula, is 1.03 to 1.1.10.   The circular knitted fabric with cellulose blend according to claim 1 or 2, wherein all of the water-absorbing stretch composite yarns are knitted in a knit structure.