JP2022108956A - Knitted fabric excellent in quick-drying property - Google Patents

Abstract

To provide a knitted fabric which is obtained by using a cotton material, and which is excellent in water absorption property and quick-drying property without causing problems such as the deterioration of fabric rupture strength, skewing, and the hardening of texture.SOLUTION: A knitted fabric includes 85% or more of ring yarn formed of cotton having a Micronaire reading value of 3.7-6.0 in accordance with ASTM D4605-86. The knitted fabric has a degree of skewing of 3.0% or less and has a moisture percentage of 40% or less after dewatering. The product of the course density and the wale density of the knitted fabric is 1000-1800. The knitted fabric has a knitted structure of one layer including no welt. The ring yarn has a twist coefficient of 2.8-3.6. The knitted structure is preferably plain stitch, moss stitch, or fraise.SELECTED DRAWING: None

Description

TECHNICAL FIELD The present invention relates to a quick-drying cotton fabric with a short drying time, and a method for producing the same.

Woven or knitted fabrics using cotton, which is a natural fiber, have high water absorbency and hygroscopicity, and have a good texture, so they are often used for various clothing items. However, cotton has the disadvantage that it swells when it absorbs moisture and takes a very long time to dry.

Therefore, underwear fabrics using cotton materials are particularly desired to have excellent performance in both water absorption and quick drying. As a method for imparting quick-drying properties to cotton fabrics, for example, Patent Document 1 proposes a method in which glyoxal-based resin is applied after mercerizing cellulosic fibers containing 100% cotton. In this method, by adding glyoxal-based resin to the fabric, the molecules in the non-crystalline regions of the cotton fibers are crosslinked, and the cross-linked cotton fibers suppress the water swelling of the non-crystalline regions. Or the woven fabric is excellent in quick drying. However, in order to realize quick-drying of the fabric by this method alone, it is necessary to increase the concentration of the reactive resin such as glyoxal-based resin.

Further, in Patent Document 2, a multi-layer spun yarn having a core fiber made of cotton and a sheath fiber made of cotton is used as a water-absorbing and quick-drying knitted fabric that has an excellent texture and has both water absorption and quick-drying properties. This multi-layer spun yarn has a core fiber with a twist coefficient of 3.0 to 5.5 and is twisted in the same direction with a sheath fiber at a twist coefficient of 2.5 to 4.0. It is characterized by being twisted and having a cotton blend ratio of 85% by weight or more with respect to the entire knitted fabric. However, since the core of this knitted fabric is made of a very strong twisted yarn, the texture is very hard, and the untwisting force of the yarn is strong, so there is a problem that the knitted fabric is severely skewed. .

JP-A-61-207672 JP 2015-67927 A

The present invention has been made to solve the problems of the prior art, and its purpose is to reduce the bursting strength of the fabric by imparting quick-drying properties to the fabric of cotton material, and to prevent skewing, hardening of the texture, etc. To provide a knitted fabric using a cotton material which is excellent in water absorbability and quick-drying property and has a good texture without causing problems, and to provide a method for producing the same.

As a result of intensive studies to achieve the above object, the inventors of the present invention used a ring yarn made of cotton having a micronearing value within a specific range, and if necessary, a specific twist coefficient, knitting structure, and shape stability. The inventors have found that it is possible to provide a knitted fabric excellent in water absorbency and quick drying property while overcoming the problems of the prior art by appropriately adopting processing and the like, and have completed the present invention.

That is, the present invention has been completed based on the above findings, and has the following configurations (1) to (8).
(1) A knitted fabric containing 85% or more of ring yarn made of cotton having a micronear reading value of 3.7 to 6.0 according to ASTM D4605-86, and having a skew degree of 3.0. % or less, and the moisture content after dehydration is 40% or less.
(2) The knitted fabric according to (1), wherein the product of the course density and the wale density of the knitted fabric is 1000 to 1800, and the knitted fabric is composed of a single layer knitting structure that does not contain a welt.
(3) The knitted fabric according to (1) or (2), wherein the ring yarn has a twist factor of 2.8 to 3.6.
(4) The knitted fabric according to any one of (1) to (3), wherein the knitting structure is selected from jersey, Kanoko, and milling.
(5) The knitted fabric according to any one of (1) to (4), wherein the time it takes for the moisture content to reach 10% after dehydration is 45 to 70 minutes.
(6) The knitted fabric according to any one of (1) to (5), which has a heat retention of 18 to 25.
(7) The knitted fabric is subjected to shape stabilization processing with a cross-linking agent, and the amount of bound formaldehyde in the knitted fabric is in the range of 0.1 to 0.8% owf (1) to (6) The knitted fabric according to any one of.
(8) A knitted fabric containing 85% or more of a cotton ring yarn having a micronearing value of 3.7 to 6.0 according to ASTM D4605-86 is knitted with a single knitting machine of 28 to 46G, and glyoxal The method according to any one of (1) to (7), characterized in that after the cross-linking treatment with the resin, a water-absorbing silicone resin is further applied to finish the wale density to 28 to 45/inch. A knitted fabric manufacturing method.

The knitted fabric made of the cotton of the present invention is excellent in water absorption and quick-drying properties, but is less prone to skewing, and is also excellent in texture and heat retention. For this reason, the knitted fabric of the present invention dries easily when sweating, dries quickly even in winter, is comfortable and warm, and is suitable for use in fabrics such as inner clothing, outdoor clothing, sports clothing, and casual clothing. can be done.

FIG. 1 is a schematic illustration of an apparatus used for measuring the amount of bound formaldehyde.

Embodiments of the present invention will be described in detail below, but the present invention is not limited to the following embodiments, and various modifications can be made without departing from the gist of the present invention.

The cotton raw material used for the ring yarn of the knitted fabric of the present invention is a fiber with a large fiber diameter having a micronearing value of 3.7 to 6.0, preferably 3.9 to 5.8, according to ASTM D4605-86. It is necessary to be When the micronear reading value is within this range, the washing dehydration property is high, and quick drying property can be easily obtained. If the micronear leading value is less than the above range, the fibers tend to retain water when they absorb water, resulting in poor dehydration and a slow drying rate. If the micronear leading exceeds the above range, the fibers become too hard and have a poor texture, making it difficult to use them for the clothing of the present invention.

Since the knitted fabric of the present invention is suitably used for underwear, shirts, etc. that require moisture absorption, it is preferable to mainly use spun cotton yarn. Here, the spun cotton yarn is a ring yarn obtained by ring spinning using cotton. The amount of cotton spun yarn used is 85% or more, preferably 90% or more, of the mass of the knitted fabric. A knitted fabric with high sweat absorption and hygroscopicity can be obtained by setting the amount to be used to the above value or more.

In addition to the cotton spun yarn described above, other fibers may be mixed in the knitted fabric of the present invention as long as the effects of the present invention are not impaired. Fibers that can be mixed include natural fibers such as hemp, wool and silk, regenerated fibers such as rayon, polynosic and cupra, semi-synthetic fibers such as acetate, and synthetic fibers such as polyester, polyamide and acrylic. However, in order not to impair the effects of the present invention, the amount to be mixed is 15% or less of the weight of the knitted fabric.

The twist coefficient of the cotton spun yarn used for the knitted fabric of the present invention is preferably 2.8 to 3.6, more preferably 2.9 to 3.5. By setting the twist coefficient of the cotton spun yarn within the above range, the washing and dehydration properties of the knitted fabric can be improved. The reason why the washing and dehydration property is improved is that the twist of the spun yarn is less, so the individual fibers are less twisted, the straightness is improved, and the parallelism between the fibers is increased, so when dewatering, the water between the fibers is easy to escape. It's for. In addition, there is also the advantage that skewing of the knitted fabric can be suppressed because the fibers are less twisted. On the other hand, if the twist factor is less than the above range, the strength of the spun yarn will be low, and the bursting strength of the knitted fabric using this will be significantly low after being imparted with quick drying properties, and the practicality will tend to decrease. Also, when the twist coefficient is larger than the above range, the strength of the knitted fabric increases, but the twist torque of the raw yarn increases, so the single knitted fabric using this has a strong skew of the stitches and is likely to be less practical. .

The number of fibers constituting the cotton spun yarn is preferably 50 or more and 150 or less, more preferably 60 or more and 140 or less. By setting the number of constituent fibers within the above range, an effect of lowering the moisture content of the knitted fabric after dehydration can be expected. On the other hand, when the number of constituent fibers is less than the above range, the strength of the spun yarn is low, and as a result, the bursting strength of a knitted fabric using the same is low, which tends to reduce practicality. On the other hand, when it is larger than the above range, the count becomes thicker or the micronearing value becomes lower, so that the washing dehydration property and the drying rate tend to decrease.

The count of the cotton spun yarn is not particularly limited, but is preferably 20 or more, more preferably 25 or more, and preferably 60 or less, more preferably 50 or less, in British cotton count. By setting the yarn count of the cotton spun yarn within the above range, it is possible to obtain a knitted fabric having good bursting strength and excellent quick-drying properties. On the other hand, if the count of the spun cotton yarn is less than the above range, it is difficult to achieve quick drying. On the other hand, if the above range is exceeded, the bursting strength may be lowered and the performance may fall short of the practical performance.

The knitted fabric of the present invention is preferably knitted with a knitting machine having a needle density of 28-46G. Knitting with a knitting gauge within this range makes it easier to bring the density of the finished knitted fabric into the preferred range. The density of the knitted fabric is appropriately set in consideration of the knitting structure, the spun yarn, etc. In the present invention, the finished knitted fabric preferably has a course density of 35 to 60 pieces/inch. Further, the wale density of the finished knitted fabric is preferably 28 to 45/inch. In order for the knitted fabric of the present invention to dry quickly, the knitted fabric preferably has a product of course density and wale density of 1,000 to 1,800. More preferably 1100-1700. By setting the product of the course density and the wale density within the above range, it becomes easier to keep the moisture content after dehydration within an appropriate range.

The knitted fabric of the present invention preferably has a single layer knit structure. The knitting structure of the knitted fabric is preferably a single circular knitting structure knitted only with a cylinder or a dial, or a structure knitted with a milling structure at the intersection of ribs. The milling cutter uses both cylinder needles and dial needles, but the back side of the front knitting loop has no backing structure, and the front side of the backing loop has no backing structure, and the yarn alternates front and back. Because of the repetition, it can be regarded as substantially a single layer of knitted fabric. The knitted fabric of the present invention preferably has a one-layer knitted structure that does not contain a welt, in order to improve washing and dehydration properties. It is preferable to use a jersey made only of knit, or a structure such as Kanoko, in which knit and tuck are alternately woven. Examples of the knitting structure include cotton sheeting, Kanoko, soccer, single ridge knitting, double ridge knitting, milling, rubber knitting such as 2 x 1, 2 x 2, 3 x 3, etc., but cotton sheeting, Kanoko, or milling are preferable. .

The knitted fabric of the present invention preferably has a basis weight of 100 to 200 g/m ² , more preferably 120 to 190 g/m ² . By setting the basis weight within the above range, a knitted fabric suitable for sports shirts and the like can be obtained. Furthermore, the thickness of the finished knitted fabric is preferably 0.3 to 1.2 mm, more preferably 0.4 to 1.0 mm. Quick-drying properties can be improved by setting the thickness within the above range.

The knitted fabric of the present invention described above uses a cotton raw material having a micronearing value of 3.7 to 6.0, (i) uses a ring spinning machine to produce a specific ring yarn, and ( ii) using 85% or more of this ring yarn to knit a knitted fabric with a 28-46G single knitting machine; cross-linking treatment, addition of water-absorbing silicone resin, and other functional processing, and finishing wale density to 28 to 45 per inch.

The step (i) is a step of producing a ring yarn, and by using a ring spinning machine, a ring yarn having a twist coefficient of 2.8 to 3.6 and a fiber configuration number of 80 to 250 is produced. is preferred. Specifically, the pre-spinning process of general spinning (blended cotton - carding (cotton) - combing - drawing - roving) is performed to create a semi-rolled yarn, and it can be produced using a ring spinning machine. . In addition to the spun single yarn, in order to increase the parallelism of the fibers in the spun yarn, two spun yarns are supplied and drafted in the spinning process and then twisted after being twisted. is preferably a two-ply yarn that is ply-twisted in the direction opposite to the ply-twist of the single yarn.

To further explain the spinning process, first, raw cotton that has been compressed and packed and transported is unraveled using a cotton blending machine, and at the same time, dust such as leaf residue, seed fragments, and dust adhering to the raw cotton is removed. to form a sheet-like “wrap”. The wrap produced through the mixed cotton process is combed using a carding machine to separate the fibers one by one and arrange them in parallel to remove small dust and short fibers. The remaining long fibers are arranged parallel to some extent and bundled into a cord-like "card sliver". 18 to 24 card slivers are fed in parallel and rolled into a single sheet to form a "sliver wrap".

In the combing process, the carded sliver is combed to remove short fibers and dust that could not be sufficiently removed in the mixed cotton/carding process, and the fibers are aligned in parallel to form a uniform combed sliver. A spun yarn that has undergone this combing process is called a combed yarn. The spun yarn used in the present invention is preferably a combed yarn in which the fibers are more parallel.

In the next drawing step, six or eight slivers of the slivers obtained through the combing process are combined using a drawing machine, and stretched six to eight times to straighten the fibers and eliminate unevenness in thickness. This process creates a string-like sliver. In the roving process, the roving sliver is further stretched using a roving machine, and is then twisted for the first time to wind the roving onto a bobbin. In the spinning process, the roving is further stretched using a spinning machine, thinned to a predetermined thickness, twisted, and the final product, the yarn, is wound on a bobbin. A spun yarn produced by using a ring spinning machine in this spinning machine is also called a ring yarn, and the knitted fabric of the present invention uses this ring yarn. After that, depending on the application, the yarn wound around the bobbin is rewound in the form of cheese or cone, or wax is applied to complete the spun yarn.

In the step (iii), the knitted fabric obtained in the step (ii) is processed under conditions such as scouring and bleaching for general cotton knitted fabrics. It is preferable to mercerize the knitted fabric during this step or in a post step. This processing increases the water absorbency of the cotton, reduces twisting of the fibers, and makes it easier to improve the parallelism between the fibers. In addition, it is possible to suppress a decrease in bursting strength when the knitted fabric is subjected to shape stabilizing processing.

It is preferable that the knitted fabric of the present invention is mercerized as described above, but if mercerized more strongly than necessary, the drying property tends to decrease. The degree of mercerization of cotton can be measured by the barium activity value. The barium activity value is preferably 80 or more, more preferably 100 or more, further preferably 110 or more. Also, it is preferably 150 or less, more preferably 140 or less, further preferably 130 or less. By setting the barium activity value of the knitted fabric within the above range, it is possible to suppress a decrease in bursting strength due to imparting quick-drying properties to the knitted fabric. On the other hand, when the barium activity value is less than the above range, it is difficult to improve quick-drying property and dyeing density. On the other hand, when it is larger than the above range, the mercerization is too strong, the knitted fabric may become stiff, and quick-drying may be difficult to improve.

In the mercerizing process, a round mercerizing machine that processes the fabric before opening the circular knitted fabric, or an open mercerizing machine that processes the fabric into a spread shape after the open fabric may be used. The knitted fabric is immersed in a caustic soda solution, then neutralized, washed with water, and dehydrated. The concentration of the caustic soda solution is preferably 5°Be (Baume degree) or more, more preferably 10°Be or more, and preferably 25°Be or less, further preferably 20°Be or less. By setting the concentration of the caustic soda solution within the above range, the effect of mercerization can be obtained. On the other hand, if the concentration of the caustic soda solution is less than the above range, the effect of mercerization is small, and the intended quick drying property tends to be lowered. Further, when the concentration of the caustic soda solution exceeds the above range, the cotton swells excessively, which may reduce the quick-drying property. The mercerizing temperature can be normal temperature, low temperature (cold sill) or high temperature, but the lower the temperature, the harder the texture tends to be, so it is preferable to perform the mercerization at normal temperature or high temperature. In terms of the actual situation, when mercerization is performed with caustic soda at a concentration of 10° Be, the barium activity value of the knitted fabric is about 110 to 120, and when processing is performed at 20° Be, the barium activity value is 120 to 135. to some extent.

The scouring, bleaching, etc. of the knitted fabric may be performed under general conditions before or after the mercerization, and dyeing and drying may be appropriately performed by general methods after the mercerization. you should go.

In addition, it is preferable that the knitted fabric of the present invention is subjected to shape stabilizing processing. This form-stabilizing process is a process that cross-links the cellulose molecules that make up cotton, making it difficult for wrinkles to occur after washing and improving dimensional stability. It also has a boosting effect. This form-stabilizing treatment preferably utilizes a cross-linking agent such as a glyoxal resin that can react with the hydroxyl groups of the cellulose fibers.

Moreover, the amount of the cross-linking agent used is preferably 0.5 to 5.0% owf (on the weight of fiber) in terms of solid content. By setting the amount of the cross-linking agent to be used within the above range, it is possible to easily achieve the quick-drying property that is the object of the present invention. On the other hand, when the amount of the cross-linking agent used is less than the above range, it becomes difficult to obtain the desired quick-drying property. On the other hand, if the amount is more than the above range, the number of cross-links is too large and the flexibility of the fiber is reduced, resulting in a markedly weakened fiber strength and a marked decrease in the bursting strength of the knitted fabric.

The processing method involves attaching these compounds to fibers by padding or impregnation, and heating with dry heat or wet heat to crosslink cellulose. The strength of this form-stabilizing treatment can be determined by measuring the amount of bound formaldehyde in the knitted fabric. The amount of bound formaldehyde is preferably 0.1% owf or more, more preferably 0.2% owf or more, and preferably 0.8% owf or less, more preferably 0.65% owf or less. The amount of bound formaldehyde is an index indicating the number of cross-linked bonds in cotton fibers after the knitted fabric is subjected to a cross-linking treatment with a cross-linking agent. By setting the amount of bound formaldehyde in the knitted fabric within the above range, the knitted fabric can be imparted with quick-drying properties. On the other hand, if the amount of bound formaldehyde is less than the above range, the number of cross-linked bonds in the cotton fibers is small, so swelling due to water absorption is not sufficiently suppressed, and it is difficult to achieve the desired quick-drying property. On the other hand, when the number of crosslinks is larger than the above range, the number of cross-links is too large and the flexibility of the fiber is reduced, resulting in a markedly weakened fiber strength and a marked decrease in the bursting strength of the knitted fabric.

In general, when cotton is cross-linked, the fiber strength is lowered, but the minimum practical strength is necessary for clothing. The burst strength of the knitted fabric of the present invention is preferably 300 kPa or more, more preferably 500 kPa or more. If the bursting strength is less than the above range, the knitted fabric is likely to be torn or punctured when worn.

It should be noted that the knitted fabric of the present invention may be subjected to various functional treatments other than those described above, either singly or in combination. Such functional processing includes, for example, antifouling processing, UV-cut processing, skin care processing, and softening processing using a water-absorbing silicone resin. However, it is also important to use softening agents and fixing agents that do not inhibit water absorbency. For example, it is preferable not to use a water-repellent silicone softener.

The knitted fabric of the present invention can have a water absorption time of 5 seconds or less based on the JIS-L-1096 method. If the dripping water absorption time exceeds 5 seconds, sweat tends to accumulate between the clothes and the skin when exercising while wearing the clothes using the knitted fabric, and a feeling of wetness tends to remain.

As the dehydration quick-drying property of the knitted fabric, the moisture content of the knitted fabric immediately after dehydration for 5 minutes after washing (moisture content after dehydration), and the time when the moisture content reaches 10% after dehydration for 5 minutes after washing (moisture content after dehydration time to 10%) is measured. The knitted fabric of the present invention can have a moisture content after dehydration of 40% or less, further 38% or less. In addition, the knitted fabric of the present invention can take 45 to 70 minutes, more preferably 45 to 60 minutes, to reach a moisture content of 10% after dehydration.

The knitted fabric of the present invention has a feature that skewing hardly occurs in spite of its high quick-drying property. This is due to the fact that the twist coefficient of the yarn used is low and that the shape-stabilizing treatment is applied. The knitted fabric of the present invention can be suppressed to 3% or less, further 2.5% or less, further 2% or less.

Cotton fiber is a typical material that feels cold in winter, but the knitted fabric of the present invention, while mainly using cotton fiber, can achieve heat retention that has never been achieved before as a one-layer knitted fabric. It is possible. The knitted fabric of the present invention can have a heat retention of 18 to 25 even without raising it.

Next, examples and comparative examples are given below to demonstrate the effects of the present invention, but the present invention is not limited to these. Each performance evaluation in Examples and Comparative Examples was performed by the following methods.

<Micronaire leading and fiber length (LEN)>
It was measured according to the micronear reading measurement method of ASTM D4605-86. The measurement equipment used a catastrophic airflow tester HVI equipped with a balance sensitive to at least 0.2% of mass. This measurement is measured using compressed air at a constant pressure and determines the resistance of the cotton fiber to an air flow 1: the pressure drop across the cotton is an indication of micronear-leading.

<Twist factor>
The number of twists was measured according to the twist number A method of JIS-L-1095:2010 9.15.1, and the twist coefficient (K) was obtained by applying it to the following formula.
Twist factor (K) = number of twists per inch (T) / (cotton count) ^1/2

<Number of fibers constituting the spun yarn>
A 10-cm piece of yarn for measurement was pulled out from the knitted fabric, cut with a sharp razor in the direction perpendicular to the fiber axis, and the cut cross section was photographed with an optical microscope to count the number of fibers. Five measurements were taken for each sample, and the average value of the measurements was taken.

<Concentration of caustic soda solution>
A caustic soda concentration was measured at the time of liquid preparation using a commercially available Baume meter manufactured by Yokota Keiki Seisakusho.

<Amount of bound formaldehyde in knitted fabric>
A sample of about 2.0 g was taken from the knitted fabric, treated in boiling water for 15 minutes, washed with water, dried completely, and then precisely weighed, and its mass was defined as W (g). Next, the sample was decomposed in sulfuric acid by the steam distillation method, and the formaldehyde produced in the sodium hydrogen sulfite aqueous solution was recovered. Subsequently, by iodometric titration, after measuring the amount of sodium bisulfite that did not react with formaldehyde (that is, excess sodium bisulfite), the adduct of formaldehyde and sodium bisulfite was decomposed with alkali, and iodine titration was performed again. The total amount of sodium bisulfite was determined by the method. Then, the amount of formaldehyde per mass of the sample was determined from the amounts of formaldehyde and sodium hydrogen sulfite added.

Specifically, as shown in FIG. 1, a cooling tube 3 was attached to a 3 L distillation flask 1 containing 200 ml of a 20% by mass H ₂ SO ₄ aqueous solution and a sample to form an extraction apparatus. Also, a 500 ml volumetric flask 5 containing 20 ml of 2 wt % NaHSO ₃ aqueous solution and 30 ml of distilled water was attached to the extraction port of the extractor. While injecting steam from the steam generator 7, the distillation flask 1 was heated with a Bunsen burner for steam distillation to slowly decompose the sample. Distillation was terminated when the liquid volume in the volumetric flask 5 increased to about 450 ml by injecting steam, and distilled water was added to the volumetric flask 5 to adjust the balance to 500 ml. Subsequently, 50 ml of the 500 ml of the solution was taken in a Meyer flask, and (1/50) N "(1/100) mol/L" I ₂ aqueous solution was added to the burette until the color changed to bluish purple using a starch aqueous solution as an indicator. and the dose of the _I2 aqueous solution was T1 (ml). Then, add 5 ml of 5 wt% Na ₂ CO ₃ aqueous solution and 10 ml of ethanol, add (1/50) N I ₂ aqueous solution dropwise until the color changes to blue purple again, and adjust the volume of I ₂ aqueous solution to T2 (ml). and The titration amount T (ml) was obtained from (T2-T1), and the bound formaldehyde amount (% by mass) of the knitted fabric was obtained by the following formula, with f being the factor of the (1/50)N _I2 aqueous solution. In the following formula, 1/100 is the molar concentration of the _I2 aqueous solution, 30 is the molecular weight of formaldehyde, and 500 and 50 are the volume of the extract and the collected amount, respectively.
Amount of bound formaldehyde (%) = {(1/100) x f x T x 30 x 500 x 100}/(W x 1000 x 50) = (0.3 x T x f)/W

<Knitted fabric density>
Measured according to the density of JIS-L-1096:2010 8.6.

<Knitted fabric thickness>
Measured according to the thickness of JIS-L-1096:2010 8.4.

<Metsuke of knitted fabric>
JIS-L-1096: 2010 8.3 Measured according to the weight per unit area in the remarks.

<Degree of skew>
JIS-L1096: 8.12 The degree of skew was evaluated by the percentage of weft curvature in the direction of the course.

<Water Absorption of Knitted Fabric>
The water absorption time (seconds) of the back surface was measured according to the JIS-L-1907 method to determine the water absorption.

<Dehydration drying property>
A sample piece with dimensions of 20 cm × 20 cm was prepared, and after conditioning the humidity for 12 hours or more in an environment of 20 ° C. and 65% RH, the test piece was sewn into a cylindrical shape with polyester thread, and the mass (W) was measured. . Washing treatment was carried out once according to JIS-L0217:1995 103 method using a domestic washing machine. However, centrifugal dehydration was carried out for 5 minutes. The mass (W1) of the sample immediately after centrifugal dehydration was measured. After that, the sample was left in a room under standard conditions (20° C./65% RH), and the mass (Wx) was measured at regular intervals to determine the time when the moisture content of the test piece reached 10%.
Moisture content after dehydration (%) = (W1-W) / W x 100
Moisture content (%) = (W x - W) / W x 100

<Heat retention>
Using Thermolabo II manufactured by Kato Tech Co., Ltd., in an environment of 20 ° C. and 65% RH, the BT plate (hot plate) of the BT-BOX is set to 35 ° C. assuming the temperature of human skin, and the sample is placed on it. was placed, and the power consumption W was measured when the amount of heat transfer reached equilibrium. Also, the power consumption W0 was measured under the condition that no sample was placed. Heat retention (%) was calculated by the following formula.
Heat retention (%) = {(W0-W)/W0} x 100
The BT plate had dimensions of 10 cm x 10 cm, while the sample had dimensions of 20 cm x 20 cm. Normally, the sample is brought into contact with the BT plate for measurement, but in the present invention, heat retention is measured by placing a spacer such as styrofoam on the BT plate and providing a gap of 5 mm between the sample and the heat insulating property. Did.

(Example 1)
Using 100% Californian cotton with an effective fiber length of 35.2 mm and a micronear leading value (4.3), after blending cotton using a cotton blending machine manufactured by OHARA, a card sliver was made using a carding machine manufactured by Ishikawa Seisakusho. rice field. After combing, leaving only the long fibers, the sliver was passed through the original loom mill twice to obtain a sliver of 250 gelen/6 yd. Further, it was passed through a roving machine manufactured by Toyoda Automatic Loom Co., Ltd. to prepare a roving of 130 gelen/15 yd. Then, this roving yarn was drafted about 32 times by a spinning machine manufactured by Toyoda Automatic Loom Co., Ltd. to produce a single yarn having an English count of 25 count. The twist factor of this spun yarn was 3.2, and the number of constituent fibers was 112.

The finished spun yarn was knitted into a jersey by a 26″-28G jersey knitting machine (manufactured by Fukuhara Kikai Co., Ltd.). The knitting conditions were a knitting yarn length of 315 mm/100 wales.

The finished raw fabric was opened → semi-mercerized → scouring, bleaching, dyeing → resin processing + softening agent treatment → soaping → softening agent treatment.

Next, using an open mercerizing machine manufactured by Shandong Iron Works Co., Ltd., at a running speed of 50 m/min, mercerizing is performed at a caustic soda concentration of 12° Be and a temperature of 20° C., followed by neutralization, water washing, and dehydration. It was dried with hot air at 150° C. using a short loop dryer. After that, using a liquid jet dyeing machine Circular NS manufactured by Hisaka Seisakusho, according to recipe 1, scouring and bleaching were performed at a liquor ratio of 1:10 at a temperature of 95 ° C. for 60 minutes, neutralized with acetic acid, and washed with water. . Subsequently, the knitted fabric is dyed with recipe 2 at a bath ratio of 1:10 at a temperature of 60 ° C. for 60 minutes, soaped, neutralized, washed with water, spread, centrifuged, and dried at 150 ° C. with a short loop dryer. It was dried with hot air for 1 minute.

Subsequently, a cross-linking treatment was performed according to recipe 3 using a tenter with a padder manufactured by Ichikin Kogyo Co., Ltd. In this processing, the wet pick-up rate was 90%, drying treatment was performed at a tenter temperature of 150° C. for 1 minute, followed by curing treatment at 170° C. for 1.5 minutes. Thereafter, after soaping with a surfactant and washing with water, softening treatment was performed according to formulation 4 using a tenter with a padder.

<Prescription 1>
Caustic soda (manufactured by Nippon Soda Co., Ltd.): 5 g / L
Scouring agent (Pitchrun L250, manufactured by Nicca Chemical Co., Ltd.): 2 g / L
Sodium tripolyphosphate (manufactured by Tada Pharmaceutical Co., Ltd.): 2 g / L
Hydrogen peroxide stabilizer (PLC7000, manufactured by Nicca Chemical Co., Ltd.): 1 g / L
35% hydrogen peroxide (Mitsubishi Gas Chemical Co., Ltd.): 15 mL / L
Softening agent in bath (Persophthal MAX, manufactured by Nicca Chemical Co., Ltd.): 1 g / L
<Prescription 2>
Reactive dye (Sumifix Supra BLUE BRF, manufactured by Sumika Chemtex): 1% owf
Bath softener (Persophthal MAX, manufactured by Nicca Chemical Co., Ltd.): 2 g / L
Anhydrous Glauber's salt (manufactured by Tosoh Corporation): 30 g / L
Alkaline agent (MS171, manufactured by Meisei Chemical Industry Co., Ltd.): 5 g / L
<Prescription 3>
Glyoxal-based cross-linking agent (Alcofix NZF: solid content 50% by mass, manufactured by Clariant Japan): 12.0 mass% (corresponding to solid content 4.2% owf)
Crosslinking reaction catalyst (RIKEN FIXER MX3, manufactured by Miki Riken Kogyo Co., Ltd.): 3.0% by mass
<Prescription 4>
Hydrophilic silicone softener (Nikka Silicon AQ-1, manufactured by Nicca Chemical Co., Ltd.): 2.0% by mass

The resulting knitted fabric had a barium activity value of 115 and a bound formaldehyde amount of 0.28%owf. Subsequently, when the dehydration drying property was evaluated, the moisture content after dehydration was 34.3%, and the time until the moisture content after dehydration reached 10% was 65.3 minutes, which were good values. Details and evaluation results of the knitted fabric of Example 1 are shown in Table 1.

(Example 2)
A knitted fabric was produced under the same conditions as in Example 1, except that the twist factor of the spun single yarn was changed to 3.0. The moisture content after dehydration was 36.6%, and the time until the moisture content after dehydration reached 10% was 63.4 minutes, which were good values. Table 1 shows details and evaluation results of the knitted fabric of Example 2.

(Example 3)
A knitted fabric was produced under the same conditions as in Example 1, except that the twist factor of the spun single yarn was changed to 3.5. The moisture content after dehydration was 37.1%, and the time until the moisture content after dehydration reached 10% was 66.3 minutes, which was a good value. Details and evaluation results of the knitted fabric of Example 3 are shown in Table 1.

(Example 4)
A knitted fabric was produced under the same conditions as in Example 1, except that the spun single yarn 25/1 was changed to a spun mated twisted yarn 25/1. The roving yarn used for spinning the spun matted yarn was spun by using two 70 gelenes and applying a draft of about 31 times. The twist number was 3.2, and the number of fiber constituents was 110. As a result of measuring the knitted fabric produced and finished, the moisture content after dehydration was 38.7%, and the time until the moisture content after dehydration reached 10% was 69.3 minutes, which was a good value. Table 1 shows details and evaluation results of the knitted fabric of Example 4.

(Example 5)
A tenjiku knitted fabric was produced under the same conditions as in Example 1, except that the knitting yarn was changed from single yarn 25/1 to two-ply yarn 50/2. For the two-ply yarn, two single yarns of Example 3 were put together and the upper twist was applied in the opposite direction to the lower twist. The twist factor of this two-ply yarn is 3.5 for the first twist and 2.3 for the final twist. The number of constituent fibers was 128. The moisture content after dehydration was 35.4%, and the time required for the moisture content after dehydration to reach 10% was 62.0 minutes, which was a good value. Table 1 shows details and evaluation results of the knitted fabric of Example 5.

(Example 6)
A knitted fabric was produced under the same conditions as in Example 1, except that Indian cotton with a raw cotton micronearing value of 4.3 to 5.5 was used. The twist factor of the spun single yarn was 3.2, and the number of fibers constituting the yarn was 102. The moisture content after dehydration was 36.6%, and the time required for the moisture content after dehydration to reach 10% was 68.3 minutes, which were good values. Table 1 shows details and evaluation results of the knitted fabric of Example 6.

(Example 7)
A knitted fabric was produced under the same conditions as in Example 1 except that the knitting structure was changed to the front pique and the knitting yarn length was changed to 298 mm/100 W. As a result, the basis weight was 182 g/m ² . The moisture content after dehydration was 37.2%, and the time until the moisture content after dehydration reached 10% was 61.2 minutes, which was a good value. Table 1 shows details and evaluation results of the knitted fabric of Example 7.

(Example 8)
Using the same raw cotton as in Example 1, a roving yarn having a roving gellen of 125 gellen/15 yd was produced, and a 40/1 yarn was spun by applying a draft of about 40 times. The twist factor of this spun single yarn was 3.2, and the number of fiber constituents was 79. Using this yarn, a milling knitted fabric was created with a 30″-18 gauge milling machine. The processing process was performed under the same conditions as in Example 1. The time required for the post-moisture content to reach 10% was 58.1 minutes, which was a good value.Table 1 shows the details and evaluation results of the knitted fabric of Example 8.

(Comparative example 1)
A knitted fabric was produced under the same conditions as in Example 1, except that new cotton fibers having a micronearing value of 3.0 were used. The twist factor of the spun yarn was 3.2, the same as in Example 1, but the number of constituent fibers was 178. The moisture content after dehydration was 41.1%, and the time required for the moisture content after dehydration to reach 10% was 85.4 minutes, which was a poor value. Table 1 shows details and evaluation results of the knitted fabric of Comparative Example 1.

(Comparative example 2)
A knitted fabric was produced under the same conditions as in Example 1, except that the twist factor of the spun yarn was changed to 5.5. The number of constituent fibers was 125. Although the moisture content after dehydration was 36.5%, which was a good result, it took 71.7 minutes for the moisture content after dehydration to reach 10%, indicating that drying was difficult. Table 1 shows details and evaluation results of the knitted fabric of Comparative Example 2.

(Comparative Example 3)
A cotton roving yarn of 100 gelens/15 yd was drafted about 40 times to create a count of 50/1. The twist factor of the finished yarn was 3.6, and the number of fibers constituting the yarn was 68. Using this yarn, a cardboard knit structure (double knitting machine 30 inches 22 gauge) was knitted and processed in the same manner as in Example 1. As a result of measuring the knitted fabric, the moisture content after dehydration was 51.2%. The time required for the post-moisture content to reach 10% was 72.9 minutes, which was a poor result. Table 1 shows details and evaluation results of the knitted fabric of Comparative Example 3.

(Comparative Example 4)
Using the same yarn (cotton 50/1) as in Comparative Example 3, a smooth fabric was knitted with a double knitting machine (30 inches, 22 gauge), and the same processing as in Example 1 was performed to create a knitted fabric. The moisture content after dehydration was 43.1%, and the time required for the moisture content after dehydration to reach 10% was 72.4 minutes, both of which were poor results. Table 1 shows details and evaluation results of the knitted fabric of Comparative Example 4.

(Comparative Example 5)
The yarn and the knitting method were the same as in Example 1, but the knitted fabric was finished without resin processing in the processing recipe. The bound formaldehyde content of the obtained knitted fabric was zero. The result of measuring the moisture content after dehydration was 50.2%, and the time required for the moisture content after dehydration to reach 10% was 90 minutes or longer. Table 1 shows details and evaluation results of the knitted fabric of Comparative Example 5.

The knitted fabric of the present invention does not cause problems such as a decrease in bursting strength, skewing, or hardening of the texture, and is excellent in water absorption and quick drying properties, and is suitable for inner clothing, outdoor clothing such as mountain climbing, and sports clothing. can be used.

Claims (8)

A knitted fabric containing 85% or more of ring yarn made of cotton having a micronearing value of 3.7 to 6.0 according to ASTM D4605-86, and a skew degree of the knitted fabric of 3.0% or less. A knitted fabric characterized by having a moisture content of 40% or less after dehydration. 2. The knitted fabric according to claim 1, wherein the product of the course density and the wale density of the knitted fabric is 1000 to 1800, and the knitted fabric comprises a single layer knitting structure containing no welt. The knitted fabric according to claim 1 or 2, wherein the ring yarn has a twist factor of 2.8 to 3.6. The knitted fabric according to any one of claims 1 to 3, wherein the knitted structure is selected from jersey, Kanoko, and milling. The knitted fabric according to any one of claims 1 to 4, characterized in that it takes 45 to 70 minutes for the moisture content to reach 10% after dehydration. The knitted fabric according to any one of claims 1 to 5, which has a heat insulating property of 18 to 25. 7. The knitted fabric according to any one of claims 1 to 6, wherein the knitted fabric is subjected to a form-stabilizing treatment with a cross-linking agent, and the bound formaldehyde amount of the knitted fabric is in the range of 0.1 to 0.8% owf. Knitted fabric. A knitted fabric containing 85% or more ring yarn made of cotton having a micronearing value of 3.7 to 6.0 according to ASTM D4605-86 is knitted with a single knitting machine of 28 to 46G, and crosslinked with glyoxal resin. The method for producing a knitted fabric according to any one of claims 1 to 7, further comprising applying a water-absorbing silicone resin after the treatment to finish the wale density to 28 to 45 / inch. .

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