JP6536591B2 - Knitting fabric excellent in heat retention and method for producing the same - Google Patents

Description

  The present invention relates to a knitted fabric excellent in heat retention while having a small basis weight and light weight, and a method of manufacturing the same.

  In recent years, in the development of knitted fabric with thermal insulation for wearing on the skin, functionalization such as moisture absorption and heat generation performance has mainly been performed, but the texture of the knitted fabric may be impaired simply by combining functional fibers. In addition, it is effective to thicken the knitted fabric to improve heat retention, but a thick underwear may interfere with the operation due to the bulging, which may impair the workability, so it is lightweight and has a texture. There is a need for the development of knitwear with good and warm skin.

  Patent Document 1 proposes a method for producing a knitted fabric by cross knitting of a spun yarn and a filament yarn, but the spun yarn used does not contain a shrinkable fiber, and a spun yarn of non-shrinkage fiber and Although it is a knitted fabric with a filament yarn and has a feeling of lightness, the heat retaining property was not sufficient.

  Although the manufacturing method of the spun yarn using high shrinkage fiber is described in patent document 2, this method is a processing method which mixes high shrinkage fiber together in the spinning process, and the spun yarn is wet heat processed in the winding process. Since it is a method of producing a lightweight spun yarn suitable to be applied to the preparation of a knitted fabric in a weft knitting process after the contraction of the yarn is made to express, it is possible to obtain good heat retention as a knitted fabric However, in order to secure its heat retaining property, it is necessary to increase the fabric weight and thickness of the knitted fabric, and the knitted fabric can not be made lightweight.

JP, 2012-167410, A JP, 2013-253334, A

  An object of the present invention is to provide a knitted fabric excellent in heat retention while having a small basis weight and light weight, and commercially available as such a lightweight and heat maintainable knitted fabric.

The gist of the present invention is as follows in order to achieve such an object.
1. A spun yarn A which contains heat-shrinkable acrylic fiber and has an elongation of 15% to 30%, and a yarn of 30 to 65 with a metric count, and a yarn B of 40 to 350 with a metric but wherein either spun yarn A in subsequently be two courses knitted is knitted one course by the yarn B have been mixed knitting, the are knitted one course in and subsequently is knitted one course by the spun yarn A the yarn B to exchange The yarn is knitted or one course knitted by the spun yarn A and subsequently knitted by two courses knitted by the yarn B and interwoven , or one course knitted by the spun yarn A and subsequently by the yarn B 3 is course organized mixed knitting has been made knitted fabric.
2. The knitted fabric according to the above 1, wherein the boiling water shrinkage before heat shrinking of the acrylic fiber is 30% to 45%.
3 . The knitted fabric according to the above 1 or 2 , wherein the heat retention rate is 30% or more.
4 . Knitted fabric according to any one of 1 to 3 weight per unit area of the knitted fabric is ^{100g / m 2 ~200g / m 2} .
5 . The knitted fabric according to any one of 1 to 4 , wherein (heat retention rate) / (weight of knitted fabric) is 0.18 to 0.35.
6 . The knitted fabric according to any one of 1 to 5 , wherein the mixing ratio of the spun yarn A to the knitted fabric is 35% by mass to 95% by mass.
7 . Knitted fabric according to any one of the 1-6 a bulkiness of the yarn A is ^{8cm 3} / ^g~20cm 3 / g.
8 . The knitted fabric according to any one of the above 1 to 7 , wherein a mixing ratio of the yarn B to the knitted fabric is 5% by mass to 65% by mass.
9 . The spun yarn A contains 30% by mass or more of a spun yarn containing 100% by mass of acrylic fiber or acrylic fiber, and includes at least one selected from the group of cellulosic fibers and animal hair fibers as other fibers. The knitted fabric according to any one of the above 1 to 8 , which is a yarn.
10 . The knitted fabric according to any one of the above 1 to 9 , wherein the yarn B is at least one selected from the group consisting of filament processed yarn, spun yarn and elastic yarn.
11 . The spun yarn a containing 30% by mass to 45% by mass of acrylic fiber having a boiling water shrinkage of 30% to 45%, and the yarn B having a yarn count of 40th to 350th in metric count, Two courses of yarn a and then one course of yarn B, or one course of yarn a and then one course of yarn B, or one course of yarn a The yarn B is knitted for 2 courses, or the yarn B is knitted for 1 course and subsequently the yarn B is knitted for 3 courses and cross-knitted to produce a knitted fabric, the knitted fabric is 70 ° C. or higher The fabric is heated by wet heat to thermally shrink the high shrinkage fibers contained in the spun yarn a to make a knitted fabric as a spun yarn A, and the spun yarn A constituting the knitted fabric is thicker than the spun yarn a and is a metric count The manufacturing method of the knitted fabric which is 30th-70th in thickness.
12 . The method for producing a knitted fabric according to 11 , wherein the spun yarn a has a metric count of 50 to 100.
13 . The 11 or 12 wherein the basis weight of the knitted fabric and ^{60g / m 2 ~120g / m 2} , the basis weight of the knitted fabric and 100g ^{/ m 2} ~200g ^/ m 2 and the knitting fabric was heated at 70 ° C. or more wet heat The manufacturing method of the knitted fabric as described in.
14 . The method for producing a knitted fabric according to any one of 11 to 13 , wherein a spun yarn having a twist coefficient of 95 to 110 is used as the spun yarn a.
15 . The method for producing a knitted fabric according to any one of 11 to 14 , wherein one or more types selected from the group consisting of filament processed yarn, spun yarn and elastic yarn are used as the yarn B.
16 . The method for producing a knitted fabric according to any one of 11 to 15 , wherein a 10 gauge to 14 gauge circular knitting machine is used for knitting the knitted fabric.

According to the present invention, it is possible to provide a knitted fabric excellent in heat retention and texture while being small and lightweight, having a weight per unit area of 200 g / m ² or less, and a knitted fabric light in weight and excellent in texture and heat retention. Can be obtained

(Arrangement)
The knitted fabric of the present invention contains heat-shrinkable acrylic fiber, has an elongation of 15% to 30%, and has a metric count of 30 to 65 and a spun yarn A, and a metric of 40 yarn B is 350 fastest is the one spun yarn a in subsequently be two courses knitted is knitted one course by the yarn B have been mixed knitting, the yarn B and subsequently is knitted one course by the spun yarn a in 1 or are courses organized are mixed knitting, two courses are knitted with the yarn B and subsequently is knitted one course by the spun yarn A are either mixed knitting, or one course knitted with the yarn A are those formed by mixed knitting 3 are courses knitted by the yarn B and subsequently being.
Since the spun yarn A and the yarn B are interwoven as described above, the spun yarn A shrinks and the yarn itself has a swelling, and the yarn B swells as the yarn B slackens with the shrinkage of the spun yarn A. coming out.
In the case where two courses of yarn A are knitted and subsequently one course of yarn B is knitted and cross-knitted, since the ratio of the spun yarn A does not increase too much, a feeling of swelling of the fabric by the yarn B is obtained. , if 3 is the course knitted is mixed knitting yarn B and subsequently is knitted one course by the spun yarn a takes place contraction of the spun yarn a is sufficiently, the bulge of the spun yarn a itself, by loosening of the yarn B A feeling of swelling of the knitted fabric can be obtained.
From these viewpoints, it and subsequently is knitted one course by the spun yarn A is knitted one course by the yarn B are mixed knitting, or are two courses knitted yarn B and subsequently is knitted one course by the spun yarn A more preferably being mixed knitting, and even more preferably and subsequently is knitted one course by the spun yarn A is knitted one course by the yarn B are mixed knitting.

In the knitted fabric of the present invention, the spun yarn A is a yarn containing an acrylic fiber and having an elongation of 15% to 30%.
By containing the acrylic fiber, the spun yarn A can be a spun yarn having a high contraction rate, and as a result of the spun yarn being shrunk, the elongation can be made 15% to 30%. If the elongation is 15% or more, the spun yarn can be shrunk to have a bulge, and if the elongation is 30% or less, the dimensional stability of the knitted fabric becomes good.
From these viewpoints, the elongation is more preferably 20% to 29%, and still more preferably 23% to 28%.

In the knitted fabric of the present invention, the thickness of the yarn B is 40th to 350th in metric count.
If the thickness of the yarn B is 40 or more in metric count, the yarn B does not become too thick, so it is easy to make the knitted fabric light in weight, and if it is 350 or less, the feeling of swelling of the knitted fabric by the yarn B is obtained It is easy to be
From these viewpoints, the thickness of the yarn B is preferably 100 to 340 in metric count, and more preferably 150 to 200.

The knitted fabric of the present invention preferably has a heat retention rate of 30% or more.
If the heat retention rate of the knitted fabric of the present invention is 30% or more, heat retention can be realized. From the above point, the heat retention rate is preferably 35% or more. In addition, the measuring method of the heat retention rate in this invention is mentioned later.

Knitted fabric of the present invention, it is preferable basis weight of the knitted fabric is ^{100g / m 2 ~200g / m 2} . If the fabric weight of the knitted fabric is 100 g / m ² or more, the heat retention rate can be 30% or more, and if 200 g / m ² or less, the knitted fabric can be lightweight.
From the viewpoint of lightness and heat retention, the basis weight of the knitted fabric of the present invention is 120 g / m ² or more, more preferably 160 g / m ² or more, and 195 g / m ² or less, more preferably 190 g / m ² It is below.

In the knitted fabric of the present invention, (heat retention rate) / (weight of knitted fabric) is preferably 0.18 to 0.35.
If the (heat retention rate) / (weight of the knitted fabric) is 0.18 or more, the knitted fabric can be a knitted fabric excellent in heat retention while being lightweight, and if it is 0.35 or less, the knitting The strength of the ground is obtained and there is no problem in use.
From these viewpoints, it is more preferable that (heat retention rate) / (weight of fabric) of the knitted fabric of the present invention is 0.21 to 0.33, and it is more preferably 0.25 to 0.32. preferable.

In the knitted fabric of the present invention, it is preferable that the thickness of the spun yarn A is 30 to 65 in metric count, and the mixing ratio of the spun yarn A to the knitted fabric is 35% by mass to 95% by mass.
If the spun yarn A contained in the knitted fabric of the present invention is a thin yarn having a metric count of 30 or more, it is preferable not only to make the knit lightweight but also in terms of texture, and the metric count has a thickness of 65 or less Are preferred in terms of yarn strength. From the above point of view, it is more preferable that the yarn count of the spun yarn is 35 to 55 in metric count.

  The mixing ratio of the spun yarn A contained in the knitted fabric of the present invention is 35% by mass to 95% by mass with respect to the knitted fabric. If the blend ratio of the spun yarn A is 35% by mass or more, it is preferable in view of the shrinkability at the time of heat and moisture heat processing, and the knitted fabric can be made to swell and heat retention can be enhanced. If the mixing rate is 95% by mass or less, it is preferable in that it can be knitted with another yarn. From the above viewpoint, the mixing ratio of the spun yarn A is preferably 50% by mass to 90% by mass, and more preferably 60% by mass to 80% by mass.

Knitted fabric of the present invention, it is preferable bulky spun yarn A is 8cm ³ / g~20cm ³ / g.
If the bulkiness of the spun yarn A is 8 cm ³ / g or more, the expansion of the yarn can reduce the weight and increase the heat retention. If the bulkiness of the spun yarn A is 20 cm ³ / g or less, it is preferable because the knitted fabric does not become too thick.
From these viewpoints, more preferably bulkiness of the yarn A is 12cm ³ / g~19cm ³ / g, further preferably 15cm ³ / g~18cm ³ / g.

In the knitted fabric of the present invention, the mixing ratio of the yarn B to the knitted fabric is preferably 5% by mass to 65% by mass.
If the mixing ratio of the yarn B to the knitted fabric is 5% by mass or more, a feeling of swelling of the knitted fabric due to the slack of the yarn B accompanying contraction of the spun yarn A is obtained, and if 65% by mass or less, the spun yarn A A feeling of swelling of the knitted fabric due to contraction can be obtained.
From these viewpoints, the mixing ratio of the yarn B to the knitted fabric is more preferably 20% by mass to 50% by mass, and still more preferably 30% by mass to 40% by mass.

The spun yarn A contained in the knitted fabric of the present invention is preferably a blended spun yarn containing 30% by mass or more of acrylic fiber or a spun yarn containing 100% by mass of acrylic fiber.
By containing 30% by mass or more of acrylic fiber in the spun yarn, it is possible to contain high-shrinkage acrylic fiber that only shrinks the knitted fabric, and to exhibit the dyeing characteristics of acrylic fiber in the knitted fabric made of spun yarn. A necessary amount can be included. Further, the acrylic fiber may be composed of two or more kinds of acrylic fibers having different shrinkage properties, strength and elongation properties, etc. in the case of raw cotton.
From the above viewpoint, the spun yarn A preferably contains 40% by mass or more, and more preferably 50% by mass or more of acrylic fibers. Moreover, the acrylic fiber contained in the spun yarn A may be composed of two or more types of acrylic fibers having different shrinkage properties and tenacity characteristics in the case of raw cotton.

  The spun yarn A contained in the knitted fabric of the present invention contains 70% by mass or less, more preferably 50% by mass or less, of one or more selected from the group of cellulosic fibers and animal hair fibers as fibers other than acrylic fibers. It may be a blended spun yarn with an acrylic fiber contained in the range, and more preferably a blended spun yarn with an acrylic fiber containing 30% by mass to 50% by mass of a cellulose fiber or an animal hair fiber. Containing 30% by mass or more of cellulose fibers in the spun yarn A is preferable from the viewpoint of moisture absorption and heating performance, and if the cellulose fibers are 50% by mass or less, the texture does not become hard even after repeated washing, more preferably spun yarn It is to contain in 40 mass% or less.

  Examples of the cellulose-based fiber include cotton, rayon, cupra, lyocell (manufactured by Lenzing Co., Ltd., registered trademark), etc., and there is no particular limitation. For example, Modal (manufactured by Lenzing Co., registered trademark), Tencel (manufactured by Lenzing Co., Ltd.) Cellulose fibers (lyocell) which is a kind of rayon made by solvent spinning such as trademark, Lexel (manufactured by Fujibo HD Co., Ltd., registered trademark), etc. are mentioned as preferable. The cellulose-based fiber preferably has a single fiber fineness of 0.8 dtex to 2.2 dtex, and more preferably 1.0 dtex to 1.5 dtex from the viewpoint of texture.

  In addition, it is preferable to include 30% by mass or more of animal hair fiber in the spun yarn A in terms of enhancing heat retention, and since the animal hair fiber is more rigid than acrylic fiber, it imparts stiffness to the knitted fabric. can do. If the animal hair fiber is 50% by mass or less, a spun yarn having a count of 40 or more can be produced with a metric count. As the animal hair fiber, for example, wool, rabbit, angora, cashmere, alpaca and the like can be mentioned. Among them, wool is preferable from the viewpoint of cost and cashmere is preferable from the viewpoint of texture.

The yarn B is preferably at least one selected from the group consisting of filament processed yarn, spun yarn and elastic yarn, from the viewpoint of improving heat retention.
As the filament-processed yarn, synthetic fibers such as polyester, nylon and polypropylene, semi-synthetic fibers such as acetate fibers, regenerated fibers such as cupra and rayon can be used, and these are false twisted yarns or twisted yarns.
As the spun yarn, staple fibers of the above-mentioned synthetic fibers, semi-synthetic fibers and regenerated fibers, natural fibers such as cotton, hemp, wool and the like may be used, and these may be blended.
The elastic yarn may be a polyurethane elastic yarn alone, or a filament twist yarn (FTY) or a core span yarn (CSY) in which other fibers are wound around the polyurethane elastic yarn.

The shrinkage ratio of the yarn B in the knitted fabric before dyeing is preferably 0% to 10%, more preferably 0% to 5%, and in this shrinkage range, the shrinkage of the spun yarn A is Since the yarn B is large, the yarn B appears on the outer side of the knitted fabric, and the knitted fabric is swelled to improve the heat retention.
In addition, the yarn B can make the knitted fabric lightweight if its thickness is 40 or more in metric count, and can be made to contain an elastic yarn such as polyurethane if it is 350 or less. Can give sex.

(Manufacture of knitted fabric)
In the method for producing a knitted fabric of the present invention, a spun yarn a containing 30% by mass to 45% by mass of acrylic fiber having a boiling water shrinkage of 30% to 45%, and a yarn thickness of 40 to 350 in metric count The yarn B, which is the yarn count, is knitted by two courses with the spun yarn a and then knitted by one course with the yarn B, or knitted by one course with the spun yarn a and subsequently knitted by one course with the yarn B. The knitted fabric is formed by one course knitting with the spun yarn a and subsequently by two courses by the yarn B, or by one course knitting with the spun yarn a and subsequently by three courses by the yarn B and cross knitting. And heat the knitted fabric with moist heat of 70 ° C. or higher to thermally shrink at least the highly shrinkable fibers in the spun yarn a, and further shrink the spun yarn itself in the lengthwise direction of the yarn by the heat shrinkage of the highly shrinkable fibers. , The obtained spun yarn A constituting the knitted fabric is thicker than the original spun yarn a One metric count in it is an thickness of 30 fastest 70 fastest.

  By including the spun yarn a in the knitted fabric at 35% by mass or more, sufficient shrinkage can be given to the knitted fabric, and by setting it at 95% by mass or less, the texture of the knitted fabric is prevented from being too hard. It can also contain other fibers. The spun yarn a is preferably contained in an amount of 60% by mass to 90% by mass, more preferably 60% by mass to 80% by mass, based on the knitted fabric.

In addition, when the high shrinkage fibers in the spun yarn a constituting the knitted fabric are heat shrunk, the high shrinkage fibers in the spun yarn a can be heat shrunk if they have a wet heat of 70 ° C. or higher. If the wet heat of 100 ° C. or less is the upper limit, the knitted fabric can be prevented from being discolored by heat. When the spun yarn a contains shrinkable fibers having a boiling water shrinkage rate of less than 30%, the shrinkable fibers can be heat shrunk with moist heat of 90 ° C to 100 ° C. The process of heating the knitted fabric with moist heat is preferably performed under the condition that tension is not applied to the fabric as much as possible, it may be wet heat heat treatment with independent hot water, or may be performed simultaneously with dyeing in the dye bath Good. In this wet heat treatment, the temperature and time are appropriately changed according to the boiling water shrinkage ratio of the high shrinkage fiber, the mixing ratio of the high shrinkage fiber in the spun yarn a, and the mixing ratio of the spun yarn a in the fabric, The yarn count of the yarn is the target yarn count.
In the present invention, the knitted fabric refers to a knitted fabric of a living machine in a stage of only being knitted, and refers to one before being subjected to wet heat treatment (staining) and the like.

  In the method for producing a knitted fabric of the present invention, it is preferable to use, as the spun yarn a, a spun yarn containing 30% by mass to 45% by mass of high shrinkage fibers having a boiling water shrinkage of 30% to 45%. If the boiling water contraction rate in the high shrinkage fiber is 30% or more, the fabric can be sufficiently swelled, and if 45% or less, the fabric can be prevented from becoming hard. From the above point of view, it is preferable that the boiling water shrinkage of the high shrinkage fiber is 33% to 40%.

  In the method for producing a knitted fabric of the present invention, it is preferable to use a high-shrinkage acrylic fiber having a boiling water shrinkage of 30% to 45% as the high-shrinkability fiber in the spun yarn a. Using high-shrinkage acrylic fiber as the high-shrinkage fiber can impart a vivid color to the knit fabric due to the good heat retention due to the low thermal conductivity of the fiber and the good color development during dyeing. The heat shrinkage of the fiber can be developed by dyeing at a moist heat of 70 ° C. or more and 100 ° C. or less under normal pressure, which is preferable from the point of economic efficiency.

  In order to develop the heat shrinkage of the high shrinkage fiber under wet heat, it is necessary to contain 30 mass% or more of high shrinkage fibers such as high shrinkage acrylic fiber in the spun yarn a, and also 45 wt% or less By doing this, the amount of other fibers covered on the yarn surface after shrinkage can be secured, and the texture can be maintained.

(Spun yarns used in the manufacture of knitted fabrics)
In the method for producing a knitted fabric of the present invention, the spun yarn a to be used can be obtained by a general cotton spinning method.
The fibers constituting the spun yarn a include high-shrinkage fibers, preferably high-shrinkage acrylic fibers, in an amount of 30% by mass to 45% by mass based on the spun yarn, and other fibers mixed and contained therein. At this time, if the blend ratio of high-shrinkable fiber is less than 30% by mass, the shrinkage force when moist heat is applied to the spun yarn is weak, and the structural change of the yarn does not occur such that the targeted spun yarn shrinks and becomes thicker. Therefore, when it becomes a knitted fabric, sufficient heat insulation can not be obtained. When the blend ratio of the high-shrinkable fiber exceeds 45% by mass, the shrinkage force when wet heat is applied is sufficient, but the texture is impaired by the decrease of other fibers appearing on the surface of the knitted fabric.

  Other fibers to be blended include acrylic fibers having a boiling water shrinkage of less than 30%, cellulosic fibers and animal hair fibers. In the method for producing a knitted fabric of the present invention, as the spun yarn a which is preferably used, high shrinkage acrylic fiber having a boiling water shrinkage of 30% to 45%, an acrylic fiber having a boiling water shrinkage of less than 30%, and cellulose A blended spun yarn with one or more fibers selected from the group of fibers and animal hair fibers is preferable in order to obtain a knitted fabric having a voluminous feel, and a spun yarn in total of other fibers other than highly shrinkable acrylic fibers. The blended spun yarn containing 60% by mass to 70% by mass is preferable. The other fiber to be blended may be a single fiber but may be a plurality of fibers of a combination of the same kind of fibers or a combination of different kinds of fibers.

  When using a cellulose fiber for one of other fibers, it is preferable to include with 30 mass%-50 mass% of mixing ratios with respect to the spun yarn a. If the mixing ratio of the cellulose fiber is less than 30% by mass, there is no effect of the hygroscopicity of the hygroscopicity by the cellulosic fiber, and if it exceeds 50% by mass, although the hygroscopicity is absorbed, the texture of the knitted fabric is repeated by repeated washing. Tends to become hard. A more preferable mixing ratio of the cellulose-based fiber is about 40 mass%. Moreover, also when using an animal hair fiber as one of the other fibers, it is preferable to be included at a blend ratio of 30% by mass to 50% by mass with respect to the spun yarn a from the viewpoint of further enhancing heat retention. The acrylic fiber having a boiling water shrinkage of less than 30% may have a boiling water shrinkage of less than 30%, and may contain low shrinkage or stretchable acrylic fibers.

  More specifically, the spun yarn a used in the method for producing a knitted fabric according to the present invention, after raw cotton is formed into a lapping process through a mixing process and a batting process, is then put into a cotton machine or the batting process is omitted. The raw cotton fiber mass is opened by feeding the raw cotton from the open-cotton machine into the loom machine, the sliver is made, and the prepared sliver is passed through the drawing machine a plurality of times to raise the fiber consistency A roving is obtained, and a spinning machine is used to obtain a spun yarn with a twist coefficient of 95 to 110 in a twisted state. The produced spun yarn a is wound on a cone in a winding process, and then moist heat of 55 ° C. is applied to remove the residual torque of twisting, and is used for knitting.

  In addition, as the spun yarn a, it is preferable to use a spun yarn of 50th to 100th counts in metric count, and use a spun yarn having a twist coefficient of 95 to 110 on the spun yarn a. preferable. The flexibility of the knitted fabric can be secured because the spun yarn a constituting the knitted fabric is 50 or more by the metric count, and the yarn breakage during knitting can be prevented by being 100 or less . From the above viewpoint, the spun yarn a is more preferably 60 to 90 in metric count, and still more preferably 75 to 85 in metric.

  Further, by setting the twisting coefficient to 95 or more, the strength of the spun yarn can be secured, and by setting the twisting coefficient to 110 or less, the number of saturated twists becomes smaller and the strength decrease due to excessively increasing the number of twists can be prevented. Preferably, the twisting factor is 100 to 107.

(Organization of knitted fabric)
In the method of manufacturing the knitted fabric according to the present invention, the knitted fabric to be the fabric is knitted by two courses with the spun yarn a and then one course is knitted with the other yarn B or one course by the spun yarn a is continued with the yarn B Obtained by 1 course knitting, 1 course knitting with spun yarn a and then 2 course knitting with yarn B, or 1 course knitting with spun yarn a and then 3 course knitting with yarn B and cross knitting Is preferred. The yarn B to be interwoven with the spun yarn a may be a filament yarn or a spun yarn, and is preferably at least one selected from the group of filament processed yarn, spun yarn and elastic yarn. The yarn B is more preferably a polypropylene false-twisted yarn, a nylon false-twisted yarn or an acrylic spun yarn, and it is particularly preferred that the polypropylene false-twisted yarn is included to reduce the weight of the knitted fabric because the specific gravity is light. Is preferred.

" Two yarn knitting with spinning yarn a, and then one yarn knitting and crossing knitting with another yarn B " generally means that "the knitting ratio of spinning yarn a and yarn B is 2: 1". Be expressed. That is, the knitting ratio is the ratio of the number of yarns A and yarns B arranged, for example, in the case of three-course knitting with yarn a, and subsequently knitting and knitting three courses with yarn B, The knitting rate is expressed as "3: 3". In the case of circular knitting, two yarns a can be placed on the yarn feeder, one yarn B can be stood, and knitting can be repeated. In the case of the weft knitting, after the spun yarn a is knitted for 2 courses, the yarn is switched from the spun yarn a to the yarn B and knitted for 1 course, and this is repeated.

In knitting to obtain a knitted fabric in the knitted fabric of the manufacturing method of the present invention, it is preferable to use a circular knitting machine of 10 gauge to 14 gauge, to a basis weight of at knitwork and ^{60g / m 2 ~120g / m 2} . The circular knitting machine used for knitting does not expand too much the stitches of the knitted fabric by setting it to 10 gauge or more, and the texture when it becomes a knitted fabric by setting it to 14 gauge or less is not too hard. Further, by setting the fabric weight to 60 g / m ² or more, the strength of the knitted fabric can be secured, and by setting the fabric weight to 120 g / m ² or less, the lightweight feel when the fabric is knitted can be maintained.

(Wet heat heat of knitted fabric)
In the method for producing the knitted fabric of the present invention, the weight per unit area of the intended knitted fabric is preferably 100 g / m ^{2 to} 200 g / m by heating the knitted fabric with moist heat of 70 ° C. or more to thicken the spun yarn. ^Set to ² . By setting the fabric weight of the knitted fabric to 100 g / m ² or more, practical strength can be secured when it becomes a product, and by setting it to 200 g / m ² or less, a product having a sense of lightweight can be obtained. .

  The wet heat treatment of the knitted fabric needs to be wet heat of 70 ° C. or higher, and when the wet heat is less than 70 ° C., sufficient contraction force is not expressed, and when it exceeds 100 ° C., the acrylic fiber in the spun yarn a The upper limit of moist heat is preferably 100 ° C. or less, and the boiling temperature at normal pressure is preferable because the acrylic fiber is yellowed by heat when it is contained, and the boiling temperature at normal pressure is 100 ° C. or less. In the wet heat treatment of the dough, it is preferable to carry out the wet heat treatment simultaneously with the dyeing using a jet flow dyeing machine.

By subjecting the knitted fabric to heat and moisture treatment, the heat shrinkage of the high-shrinkability fibers in the spun yarn a constituting the fabric and the shrinkage in the longitudinal direction of the spun yarn itself are developed. Obtaining a knitted fabric having a basis weight of 100g / m ² ~200g / m ² by the wet heat heat treatment. If the fabric weight of the knitted fabric is 100 g / m ² or more, the strength of the knitted fabric when made into a product can be increased, so it can withstand practical use, and if 200 g / m ² or less, the knitted fabric becomes too thick It becomes a product that is easy to move.

(High-shrinkage acrylic fiber)
The high-shrinkage acrylic fiber which is preferably used as the high-shrinkage fiber in the method for producing a knitted fabric of the present invention can be obtained by a spinning method by wet spinning using the following acrylonitrile polymer. As a polymer of the raw material of high-shrinkage acrylic fiber, for example, an acrylonitrile polymer obtained by an aqueous suspension polymerization method, which is used in the production of ordinary acrylic fiber, may be mentioned, and it is not particularly limited. It is preferable that the other component containing an acrylonitrile is a copolymer copolymerized. Thereby, the original characteristics of acrylic fiber can be expressed.

  Examples of the copolymerization component with acrylonitrile include acrylic esters represented by methyl acrylate, ethyl acrylate, isopropyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, etc. Methacrylates represented by methyl methacrylate, ethyl methacrylate, isopropyl methacrylate etc., and further acrylic acid, methacrylic acid, maleic acid, itaconic acid, acrylamide, styrene, vinyl toluene, vinyl acetate, vinyl chloride, vinylidene chloride, Examples include vinyl bromide, vinylidene bromide, vinyl fluoride, vinylidene fluoride and the like. Further, copolymerization of p-sulfophenyl methallyl ether, methallyl sulfonic acid, allyl sulfonic acid, styrene sulfonic acid, 2-acrylamido-2-methyl propane sulfonic acid, and alkali salts thereof with acrylonitrile is an improvement in dyeability. Preferred for

(Creating high-shrinkage acrylic fiber)
The high-shrinkage acrylic fiber suitable as the high-shrinkage fiber contained in the spun yarn a used in the present invention can be obtained, for example, by wet spinning as follows.
A copolymer consisting of 91% by mass of acrylonitrile and 9% by mass of vinyl acetate obtained by the aqueous suspension polymerization method is dissolved in dimethylacetamide to make a spinning stock solution with a polymer concentration of 20% by mass. Using a spinneret equipped with a round-shaped discharge hole, this spinning stock solution has a composition of 30% by mass to 60% by mass of dimethylacetamide, 70% by mass to 40% by mass of water, and a coagulation bath at a temperature of 30 ° C to 50 ° C. Eject and spin at. The number of discharge holes is not particularly limited. After spinning, it is drawn 5 times, followed by oil solution deposition and drying with a heat roller at 150 ° C., and then through a heat relaxation step, the drawn tow is further drawn at a magnification of 1.1 times to 2.0 times. Boiling water shrinkage rate can be given, and a high shrinkage property acrylic fiber with a boiling water shrinkage rate of 30% to 45% can be obtained.

Hereinafter, the present invention will be specifically described by way of examples . Evaluation items in the real施例was measured by the following method. In the following examples and comparative examples, the statement of “Cross-knitted the spun yarn a and the yarn B at a knitting ratio of 1: 1” is formed by one course of the spun yarn a and then by the yarn B. Means of course organization and knitting.
(Measurement method of heat retention rate)
The method of measuring the heat retention rate is based on a test method by Boken Quality Evaluation Organization, using KOTO-TECH KES-F Thermo Lab II tester, under a wind of 30 cm / sec, constant temperature (environment temperature + 10 ° C. The test piece is set on the heating plate set to), and the heat quantity (a) dissipated through the test piece is determined. Further, the amount of heat dissipated (b) without the test piece set is determined, and the heat retention rate (%) is calculated according to the following equation.
Heat retention rate (%) = (1-a / b) × 100

(Method for measuring yarn bulkiness)
Bulkiness was measured in the same manner as JIS L1095 (2010) 9.14.2 B except that spun yarn A was unwound from the knitted fabric and 200 yarns of 10 cm were prepared.

Example 1
An acrylonitrile copolymer consisting of 91% by mass of acrylonitrile and 9% by mass of vinyl acetate obtained by the aqueous suspension polymerization method was dissolved in dimethylacetamide to obtain a spinning solution with a polymer concentration of 20% by mass. The spinning stock solution was discharged into a coagulation bath having a composition of 60% by mass of dimethylacetamide and 40% by mass of water at a temperature of 40 ° C. using a spinneret equipped with round-shaped discharge holes. The spinneret used was a nozzle nozzle with a diameter of 0.008 mm for the discharge hole and 15000 holes. Subsequently, the solvent is washed in boiling water and then stretched by 5 times, followed by depositing the oil solution, drying with a heat roller at 150 ° C., heat relaxation treatment, and 1.8 times of steam to obtain a target shrinkage rate. After passing through the drawing process, the fiber length is cut to 38 mm to obtain an acrylic fiber having an empty bean cross section. The obtained acrylic fiber is an acrylic fiber having a high shrinkage of a single fiber fineness of 1.3 dtex, a fiber length of 38 mm, and a boiling water shrinkage ratio (BWS) of 38%, and is hereinafter referred to as high shrinkage acrylic fiber (V85).

For production of spun yarn, 20% by mass of the above-mentioned high-shrinkage acrylic fiber (V85), 30% by mass, an acrylic fiber with a single fiber fineness of 1.0 dtex and 18% BWS (Mitsubishi Rayon H129) And 40 wt% of acrylic fiber with a single fiber fineness of 0.8 dtex and BWS of 1% (H616 manufactured by Mitsubishi Rayon Co., Ltd.), and a light heating acrylic fiber with a single fiber fineness of 3.3 dtex and 2 wt% of BWS (Mitsubishi Rayon Co., Ltd., ET 10) is introduced into the cotton spinning process at a raw cotton ratio of 10% by mass, mixed with cotton after the opening process, then a sliver is made using a flat card, and the drawing process is carried out twice Yarns were prepared, and a spinning coefficient of 105, a metric count of 85 was obtained as a spun yarn a through the spinning process. The spun yarn a was wound on a cone in a winding process, and then twisted at a wet heat of 55 ° C. Next, a circular knitting machine with a 12-gauge (G) 24-neck knitting machine with a 1: 1 knitting ratio of the 85th spun yarn a thus prepared and the yarn B which is a polypropylene false-twisted yarn (56 dtex / 30f) The knitted fabric having a three-step smooth texture was used to intertwist and obtain a knitted fabric having a blending ratio of 65% by mass and a basis weight of 72 g / m ² of the spun yarn a of the 85th count. The knitted fabric was dyed with a cationic dye at 98 ° C. for 30 minutes in a wet heat treatment using a jet flow dyeing machine. The obtained knitted fabric had a basis weight of 120 g / m ² , and in this knitted fabric, the spun yarn a, which was 85th in metric count, was the 50th spun yarn A in metric count. Further, the obtained knitted fabric had a heat retention rate of 38% and was excellent in heat retention.

(Example 2)
The twisting ratio is 12 gauge (G) and the yarn B, which is a twisted coefficient of 105 for the twist coefficient prepared in Example 1 and a yarn count of 85, and a yarn B of nylon false twist textured yarn (30 dtex / 16 f) 2.) A smooth textured knitted fabric was cross-knitted using a 24-neck circular knitting machine to obtain a knitted fabric with a blend ratio of the 85th count spun yarn a of 78% by mass and a basis weight of 99 g / m ² . The knitted fabric was dyed in the same manner as in Example 1. The obtained knitted fabric has a basis weight of 165 g / m ² , and the spun yarn A constituting this knitted fabric is such that the above-described 85th count spun yarn a is shrunk to become a 50th count thick dyed yarn by metric count It was The obtained knitted fabric had a heat retention rate of 37% and was excellent in heat retention.

(Example 3)
A rayon having 40% by mass of the high-shrinkable acrylic fiber (V85) prepared in Example 1, 20% by mass of the same acrylic fiber (H 616) as that used in Example 1, and a single fiber fineness of 1.3 dtex After blending Ry) with 40% by mass, through a cotton spinning process, a spun yarn a having a twisting factor of 105 and a metric count of 68 was produced. With this metric count, use a 12-gauge (G) 24-neck circular knitting machine with a knitting ratio of 1: 1 and a yarn B that is the 68th spun yarn a and FTY (30 dtex / 20 f), and knit the woven fabric of Tendon texture It was mixed knitting, mixing ratio is 87 mass% of the 68 fastest of the spun yarn a, to give a knitted fabric having a basis weight of 92 g / m ^2. The knitted fabric was dyed in the same manner as in Example 1. The obtained knitted fabric has a fabric weight of 153 g / m ² , and the spun yarn A constituting this knitted fabric is such that the above-mentioned 68 th count spun yarn a is shrunk to become a 40 th thick sewn yarn with a metric count It was In addition, the obtained knitted fabric had a heat retention rate of 31% and had sufficient heat retention.

(Example 4)
Cross-knitted yarn B, which is a polypropylene false-twisted yarn (56 dtex / 36 f) having a twist coefficient of 105 and a metric count of 68 and a polyurethane yarn (30 dtex / 20 f), prepared in Example 3 Using a 12 gauge (G) 24 mouth circular knitting machine with a ratio of 1: 1, the knitted fabric of smooth texture is interwoven, and the mixing ratio of the 68th count spun yarn a is 63% by mass and the basis weight is 112 g / m ² I got a knitted fabric. The knitted fabric was dyed in the same manner as in Example 1. The obtained knitted fabric has a basis weight of 187 g / m ² , and the spun yarn A constituting this knitted fabric becomes a result of shrinkage of the spun yarn a of number 68 and becomes a thick dyed yarn of number 40 in metric number It was Further, the obtained knitted fabric had a heat retention rate of 39% and was excellent in heat retention.

(Example 5)
The same rayon as used in Example 3 with 40% by mass of the high-shrinkable acrylic fiber (V85) prepared in Example 1 and with 20% by mass of the same acrylic fiber (H616) as used in Example 1 After mixing (Ry) with 20% by mass and cotton (Cotton) with a mixing ratio of 20% by mass, through a cotton spinning process, a spun yarn a having a twisting factor of 105 and a metric count of 85 was prepared. In addition, 100 mass% of the same acrylic fiber (H616) as that used in Example 1 was used, and a yarn B, which is a 48-th spun yarn, was made with a metric count through a cotton spinning process and used as a knitting partner. Using a 12-gauge (G) 24-neck circular knitting machine with a knitting ratio of 1: 1, the above-mentioned spun yarn of a 85th yarn and the yarn B is knitted with a knitted fabric of deerskin tissue, and spun of the 85th yarn. A knitted fabric with a blend ratio of yarn a of 36% by mass and a basis weight of 110 g / m ² was obtained. The knitted fabric was dyed in the same manner as in Example 1. The knitted fabric thus obtained has a basis weight of 184 g / m ² , and the spun yarn A constituting this knitted fabric is such that the above-mentioned spun yarn # 85 of number 85 shrinks and it becomes a thick dyed yarn of number 50 by metric number It was Further, the obtained knitted fabric had a heat retention rate of 38% and was excellent in heat retention.

(Example 6)
30% by mass of the high-shrinkage acrylic fiber (V85) prepared in Example 1 and 20% by mass of the same acrylic fiber (H129) as used in Example 1 The same acrylic fiber (H616) as used in Example 1 Of 40% by weight, and the same acrylic fiber (ET10) as used in Example 1 at a mixing ratio of 10% by weight, and then through a cotton spinning process; The thread a was made. Smooth knitting structure using a 12-gauge (G) 24-neck circular knitting machine with a knitting ratio of 1: 1: the 68th spun yarn a and the yarn B which is a hollow propylene false twisted yarn (135 dtex / 60f) was mixed knitting a knitted fabric, a mixing ratio is 66 mass% of the 68 fastest of the spun yarn a, basis weight was obtained knitted fabric 72 g / m ^2. The knitted fabric was dyed in the same manner as in Example 1. The obtained knitted fabric has a basis weight of 124 g / m ² , and the spun yarn A constituting this knitted fabric becomes a result of shrinkage of the spun yarn a of number 68 and becomes a thick dyed yarn of number 40 in metric number It was Further, the obtained knitted fabric had a heat retention rate of 37% and was excellent in heat retention.

(Comparative example 1)
The twisted coefficient a prepared in Example 1 was 105, and the 85-th spun yarn a was wound-dyed with a metric count and contracted to obtain a spun yarn A. Although it was tried to wind up the spun yarn A from the cocoon to the yarn tube for knitting, the dyed spun yarn A was cut and could not be wound up on the yarn tube.

(Comparative example 2)
At a mixing ratio of 60% by mass of acrylic fiber (H129) and 40% by mass of Cotton, the same as that used in Example 1, a spun yarn having a twisting factor of 105 and a metric count of 85 was produced. In addition, 100 mass% of the same acrylic fiber (H616) as that used in Example 1 was used, and a cotton spinning process was carried out, and a yarn B, which was a 48-th spun yarn, was made with a metric count and used as a knitting partner. Using the 12G24 circular knitting machine with a cross knitting ratio of 1: 1 with a spinning ratio of 1: 85 and a spun yarn B of the 48 th with the above-mentioned metric count, the knitted fabric of Tengu fabric is interwoven, A knitted fabric with a blend ratio of 85% count spun yarn of 36% by mass and a basis weight of 184 g / m ² was obtained. The knitted fabric was dyed in the same manner as in Example 1. The obtained knitted fabric has a basis weight of 184 g / m ² , and in this knitted fabric, the spun yarn a, which was 85th in metric count in the knitted fabric, is 70th in colored metric yarn, The knitted fabric had a heat retention rate of 24%, and sufficient heat retention was not obtained.
The constitution of the knitted fabric and the evaluation items in the above-described Examples and Comparative Examples are summarized in Table 1.

The knitted fabric of the present invention is small and lightweight with a fabric weight of 200 g / m ² or less and excellent in heat retention, and is suitable as a material for inner garments such as underwear, sleeping equipment, sports clothing, etc. , The knitted fabric of the present invention can be easily provided commercially.

Claims (16)

Containing acrylic fibers obtained by heat-shrinkage, elongation is 15% to 30%, and yarn A of 30 fastest 65 fastest in metric count, yarn B of 40 fastest 350 fastest in metric count,
Two courses are formed by the spun yarn A, and then, one course is formed by the yarn B and interwoven ,
Whether one course is knitted with the spun yarn A and subsequently one course is knitted with the yarn B,
One course is knitted by the spun yarn A, and then two courses are knitted by the yarn B, or
3 course organized by knitted fabric formed by mixed knitting and subsequently is one course organized in the yarn B in the spun yarn A. The knitted fabric according to claim 1, wherein a boiling water shrinkage ratio before heat contraction of the acrylic fiber is 30% to 45%. The knitted fabric according to claim 1 or 2 , wherein the heat retention rate is 30% or more. Knitted fabric according to any one of claims 1 to 3 weight per unit area of the knitted fabric is ^{100g / m 2 ~200g / m 2} . (Heat retention rate) / (weight of knitted fabric) is 0.18 to 0.35, The knitted fabric according to any one of claims 1 to 4 . The blend ratio of the said spun yarn A with respect to the said knitted fabric is 35 mass%-95 mass%, The knitted fabric as described in any one of Claims 1-5 . Knitted fabric according to any one of claims 1-6 bulkiness of the yarn A is ^{8cm 3} / ^g~20cm 3 / g. Knitted fabric according to any one of claims 1 to 7 mixing ratio is 5 mass% to 65 mass% of the yarn B with respect to the knitted fabric. The spun yarn A contains 30% by mass or more of a spun yarn containing 100% by mass of acrylic fiber or acrylic fiber, and includes at least one selected from the group of cellulosic fibers and animal hair fibers as other fibers. 9. The knitted fabric according to any one of claims 1 to 8 , which is a yarn. The knitted fabric according to any one of claims 1 to 9 , wherein the yarn B is at least one selected from the group consisting of filament processed yarn, spun yarn and elastic yarn. The spun yarn a containing 30% by mass to 45% by mass of acrylic fiber having a boiling water shrinkage of 30% to 45%, and the yarn B having a yarn count of 40th to 350th in metric count, Two courses of yarn a and then one course of yarn B, or one course of yarn a and then one course of yarn B, or one course of yarn a The yarn B is knitted for 2 courses, or the yarn B is knitted for 1 course and subsequently the yarn B is knitted for 3 courses and cross-knitted to produce a knitted fabric, the knitted fabric is 70 ° C. or higher The fabric is heated by wet heat to thermally shrink the high shrinkage fibers contained in the spun yarn a to make a knitted fabric as a spun yarn A, and the spun yarn A constituting the knitted fabric is thicker than the spun yarn a and is a metric count The method of manufacturing a knitted fabric with a thickness of 30th to 70th. The method for producing a knitted fabric according to claim 11 , wherein the spun yarn a has a metric count of 50 to 100. Wherein the basis weight of the knitted fabric and ^{60g / m 2 ~120g / m 2} , or claim 11 the basis weight of the knitted fabric by the knitting fabric was heated at 70 ° C. or more wet heat and 100g ^{/ m 2} ~200g ^/ m 2 The manufacturing method of the knitted fabric as described in 12 . The method for producing a knitted fabric according to any one of claims 11 to 13 , wherein a spun yarn having a twist coefficient of 95 to 110 is used as the spun yarn a. As the yarn B, filament yarn, the knitted fabric manufacturing method according to any one of claims 11 to 14, use at least one member selected from the group of the spun yarn and the elastic yarn. The method for producing a knitted fabric according to any one of claims 11 to 15 , wherein a 10 gauge to 14 gauge circular knitting machine is used for knitting the knitted fabric.