JP7341392B2 - Bulky acrylic fabric and method for producing bulky acrylic fabric - Google Patents

Description

The present invention relates to a bulky acrylic fabric using a bulky acrylic blend yarn containing shrinkable acrylic short fibers that have undergone shrinkage, and a method for producing the bulky acrylic fabric.

Blended yarns containing shrinkable acrylic fibers and non-shrinkable fibers can provide bulkiness to knitted fabrics by causing the non-shrinkable fibers to stand out on the surface layer of the blended yarn by shrinking the shrinkable acrylic fibers, giving the knitted fabric a sense of fullness. It is often used for this purpose. However, in textiles, it is difficult to obtain a sense of fullness due to strong constraints in the weaving structure, and acrylic blend yarns have mostly been used for knitting, so practical textiles that take advantage of the characteristics of acrylic fibers Efforts to develop it have been limited.

Under such circumstances, Patent Document 1 is known as an example of a fabric that utilizes the shrinkability of acrylic fibers. This document discloses that in order to obtain a fabric with bulkiness, a fabric is woven using a blended yarn consisting of alkali-treated cotton fibers and high-shrinkage acrylic fibers, and the fabric is shrunk by hot water treatment to obtain a bulky fabric. ing. Furthermore, a method for producing a bulky fabric is disclosed in which the blended yarn is subjected to shrinkage treatment and then woven into a fabric.

Japanese Patent Application Publication No. 11-100737

The invention of Patent Document 1 focuses on the materials that make up the fabric, but there are cases where it is not possible to obtain a fabric with the desired bulkiness just by selecting the material, or even if the fabric is bulky, the texture of the fabric becomes clogged. may become hard. An object of the present invention is to provide a bulky acrylic fabric that can exhibit sufficient bulk and soft texture.

As a result of intensive studies to achieve the above-mentioned objective, the present inventors have found that by using bulky acrylic blend yarn in a part of the fabric instead of all of it, a clothing application that achieves both bulkiness and soft texture. The inventors have discovered that a bulky acrylic fabric suitable for use in, etc., can be obtained, and have arrived at the present invention.

That is, the present invention is achieved by the following means.
(1) A bulky acrylic blend yarn containing 20 to 60% by weight of shrinkable short acrylic fibers and 40 to 80% by weight of non-shrinkable short fibers, with the non-shrinkable short fibers protruding from the surface , is used at least as a weft. It is characterized by the fact that all of the warp yarns are non-shrinkable spun yarns or long fibers, and the English cotton count of the bulky acrylic blend yarn used for the weft is less than the English cotton count of the warp yarns. A bulky acrylic fabric.
(2) In place of the bulky acrylic blended yarn in the bulky acrylic fabric, a spun yarn in which the shrinkable acrylic short fibers of the bulky acrylic blended yarn are replaced with the same fibers as the non-shrinkable short fibers is used. The bulky acrylic fabric according to item (1), wherein the bulky acrylic fabric has a specific volume ratio of 120% or more relative to the otherwise similar fabric.
( 3 ) The bulky product according to (1) or ( 2 ), wherein the shrinkable acrylic short fibers are shrinkable acrylic short fibers with a boiling water shrinkage rate of 15 to 45%. acrylic fabric.
( 4 ) The bulky acrylic fabric according to any one of (1) to ( 3 ), wherein the non-shrinkable short fibers include non-shrinkable acrylic short fibers with a fineness of 1.0 dtex or less.
( 5 ) The bulky acrylic fabric according to any one of (1) to ( 4 ), wherein the bulky acrylic blend yarn is a long and short composite yarn having polyurethane filaments as a core.
( 6 ) The bulky acrylic fabric according to any one of (1) to ( 5 ), which is a denim fabric.
( 7 ) An acrylic blend yarn containing 20 to 60% by weight of shrinkable acrylic staple fibers with a boiling water shrinkage rate of 15 to 45% and 40 to 80% by weight of non-shrinkable staple fibers was heated in hot water at 80 to 100°C for 10 minutes. Weaving is carried out using bulky acrylic blended yarn obtained through a manufacturing process including a shrinkage development process in which the process is performed for at least 10 minutes, and a slow cooling process at a cooling rate of 1°C/min or less under no tension, as at least a part of the weft yarns. A manufacturing method for a distinctive bulky acrylic fabric.

The bulky acrylic fabric of the present invention has both bulkiness and soft texture by using bulky acrylic blend yarn in part, and can be suitably used for clothing and the like. This bulky acrylic fabric is a practical fabric that takes advantage of the features of acrylic fibers, and has sufficient bulk and a soft texture unique to acrylic fibers. In addition, when such bulky acrylic fabrics use non-shrinkable short fibers with a small fineness, they can have an excellent texture with a raised feel without being subjected to raising treatment. The bulky acrylic fabric of the present invention having such performance can be used for, for example, shirts, blouses, coats, sportswear, skirts, trousers, underpants, linings, sheets, cushions, curtains, interior decorations, and the like.

The present invention will be explained in detail below. The bulky acrylic blend yarn used in the present invention is a yarn containing shrinkable acrylic short fibers and non-shrinkable short fibers, and the non-shrinkable short fibers protrude from the surface of the yarn, resulting in bulky properties. It is something that expresses. That is, the above-mentioned bulky acrylic blend yarn shrinks the yarn containing shrinkable acrylic short fibers and non-shrinkable short fibers, shrinks the shrinkable acrylic short fibers, and bends the non-shrinkable short fibers to form the surface of the yarn. It has a structure in which the non-shrinkable short fibers bend and protrude outward from the core of the yarn containing shrinkable acrylic short fibers and non-shrinkable short fibers. be.

Here, the shrinkable acrylic short fibers before shrinkage (hereinafter simply referred to as shrinkable acrylic short fibers) preferably have a boiling water shrinkage rate of 15 to 45%, more preferably 20 to 45%, as measured by the method described below. More preferably, it is 30 to 40%. If the boiling water shrinkage rate is less than the lower limit above, sufficient bulkiness may not be obtained; if it exceeds the upper limit, the single fiber elongation after shrinkage becomes too high, resulting in a bulky acrylic blend yarn. It may stretch easily and make weaving difficult. Note that a plurality of types of such shrinkable acrylic short fibers may be used.

Further, the fineness of the shrinkable acrylic short fibers is preferably 0.4 to 5.0 dtex, more preferably 0.5 to 3.0 dtex, and even more preferably 0.9 to 2.4 dtex. If the fineness is less than the lower limit above, it will be difficult to spin, and if it exceeds the upper limit, the number of fibers that make up the yarn will decrease and the strength of the yarn will decrease, so there is a risk that it will be blown out by air during weaving and weaving will not be possible. There is.

Furthermore, the fiber length of the shrinkable acrylic short fibers is preferably 32 to 150 mm, more preferably 38 to 51 mm. If the fiber length is less than the lower limit above, the spinning quality will be poor, and if it exceeds the upper limit, it will not be possible to spin with normal spinning equipment, and modifications to the spinning equipment such as changing the gauge between rollers or changing parts will be required. It may be necessary.

Further, as described above, the bulky acrylic blend yarn contains non-shrinkable short fibers. The boiling water shrinkage rate of such non-shrinkable short fibers is smaller than that of the above-mentioned shrinkable acrylic short fibers, preferably 10% or less, more preferably 3% or less. If the boiling water shrinkage rate exceeds the above upper limit, the difference in shrinkage rate from the shrinkable acrylic short fibers will be small, so when the shrinkable acrylic short fibers are caused to shrink, the non-shrinkable short fibers will emboss on the yarn surface. may become smaller and the bulkiness may not be obtained. In addition, such non-shrinkable short fibers may not shrink at all, or multiple types may be used.

The above-mentioned non-shrinkable short fibers include natural fibers such as cotton, hemp, wool, and animal hair (mohair, cashmere, camel, alpaca, angora, etc.), recycled fibers such as rayon and cupro, and semi-synthetic fibers such as acetate and Promix. Fibers, synthetic fibers such as acrylic, nylon, and polyester can be used. Among them, by using acrylic fiber as the material, it becomes easier to obtain a fabric that has excellent heat retention and a warm sensation to the touch. Further, the fineness of the non-shrinkable short fibers is preferably 5.0 dtex or less, more preferably 1.0 dtex or less. In particular, by having a fineness of 1.0 dtex or less, it becomes easier to obtain the advantage of a soft, brushed texture. The lower limit of the fineness is desirably 0.3 dtex or more from the viewpoint of spinning processability.

The fiber length of the non-shrinkable short fibers is preferably 32 to 150 mm, more preferably 38 to 51 mm. By setting the fiber length within this range, the fiber ends are moderately exposed on the yarn surface after shrinkage treatment, making it easier to obtain a raised feel. If the fiber length is less than the lower limit above, the spinning quality will be poor, and if it exceeds the upper limit, it will not be possible to spin with normal spinning equipment, and modifications to the spinning equipment such as changing the gauge between rollers or changing parts will be required. There is a possibility that it will be necessary.

Further, the bulky acrylic blend yarn employed in the present invention contains 20 to 60% by weight, preferably 30 to 40% by weight of the above-mentioned shrinkable acrylic short fibers. If the content of such acrylic short fibers is less than the above-mentioned lower limit, the content of shrinkable acrylic short fibers before the shrinkage treatment is insufficient, and sufficient and uniform bulkiness cannot be obtained. On the other hand, if the above upper limit is exceeded, the number of non-shrinkable short fibers decreases, and the amount of fibers arranged on the surface layer of the yarn after shrinkage decreases, making it impossible to obtain a bulging feeling.

Further, the bulky acrylic blend yarn employed in the present invention contains 40 to 80% by weight, preferably 60 to 70% by weight of the above-mentioned non-shrinkable short fibers. If the content of non-shrinkable short fibers is less than the above lower limit, the amount of fibers placed on the surface layer of the yarn after shrinkage will be small, making it impossible to obtain a full feeling. Since the amount of shrinkable acrylic short fibers before treatment is reduced, sufficient and uniform bulkiness cannot be obtained.

Furthermore, the bulky acrylic blend yarn employed in the present invention may contain fibers other than the above-mentioned shrinkable acrylic short fibers and non-shrinkable short fibers (hereinafter referred to as other fibers). Examples of such other fibers include long fibers, such as polyurethane long fibers, nylon long fibers, rayon long fibers, and the like.

In addition, the structure of the bulky acrylic blend yarn includes general short fiber spun yarn, as well as long and short composite yarns such as core spun yarn, covered yarn, and wrapping yarn. A typical example of the long and short composite yarn is a yarn whose core is the above-mentioned polyurethane long fibers and whose outer layer is made up of shrinkable acrylic short fibers and non-shrinkable short fibers.

The bulky acrylic fabric of the present invention is a fabric using the above-described bulky acrylic blended yarn, and is a fabric using yarn other than the bulky acrylic blended yarn for at least a portion of the warp. If bulky acrylic blend yarns are used for all warp yarns, the bulky acrylic blend yarns will be stretched due to the tension applied to the warp yarns during simultaneous sizing and weaving, resulting in loss of bulk and increased residual shrinkage, which poses a problem. There is a fear. It is desirable that the yarn other than the bulky acrylic blend yarn used for the warp be a yarn composed of fibers having a boiling water shrinkage rate of 10% or less.

In addition, in the bulky acrylic fabric of the present invention, when at least a portion of the weft is made of bulky acrylic blended yarn and all of the warp is made of non-shrinkable spun yarn or long fiber, bulkiness and soft texture can be achieved at the same time. It is easy to obtain a product with good stability. Here, the non-shrinkable spun yarn used for the warp is a spun yarn composed of fibers having a boiling water shrinkage rate of 10% or less, and examples thereof include cotton yarn and various short fiber spun yarns. Further, as the long fibers used for the warp, cupro long fibers, nylon long fibers, rayon long fibers, etc. can be used.

Further, in the bulky acrylic fabric of the present invention, it is desirable that the English cotton count of the bulky acrylic blend yarn used for the weft is equal to or lower than the English cotton count of the warp. If the English cotton count of the bulky acrylic blend yarn used for the weft is larger than the English cotton count of the warp, the bulky acrylic blend yarn used for the weft will be thinner than the warp, resulting in a perceived bulkiness. There is a risk that it will disappear.

Furthermore, in the bulky acrylic fabric of the present invention, instead of the bulky acrylic blended yarn used in the fabric, the shrinkable acrylic short fibers in the bulky acrylic blended yarn are substituted with the non-shrinkable acrylic short fibers in the bulky acrylic blended yarn. The specific volume ratio is 120% or more compared to a similar woven fabric except that the spun yarn is replaced with the same fiber as the short fiber. If the specific volume ratio is less than 120%, it becomes difficult to experience the bulkiness of the fabric.

The weave structure of the bulky acrylic fabric of the present invention is not particularly limited, and may be a 1/1 plain weave, but from the viewpoint of obtaining bulkiness and soft texture, the bulky acrylic blend yarn is continuously raised. It is desirable to have a woven structure in which the number of fibers is preferably two or more, more preferably three or four. On the other hand, if the number of protruding lines exceeds seven, problems such as snagging and slipping are likely to occur. Here, "weaving structure in which two or more consecutively protruding threads" refers to a weaving structure based on a weaving structure in which two or more warp threads (or weft threads) consecutively protrude above the weft threads (or warp threads). Examples include 2/2 and 3/1 twill weave, 4/1 satin weave, and double weave.

Typical configurations of the bulky acrylic fabric of the present invention include 3/1 denim fabric using short fiber spun cotton yarn for the warp and bulky acrylic blend yarn for the weft, and 3/1 denim fabric using long fiber rayon yarn for the warp. Examples include 4/1 satin fabric using bulky acrylic blend yarn for fibers and wefts.

The method for manufacturing the bulky acrylic fabric of the present invention described above can be roughly divided into two methods. That is, an acrylic blended yarn containing 20 to 60% by weight of shrinkable acrylic staple fibers with a boiling water shrinkage rate of 15 to 45% and 40 to 80% by weight of non-shrinkable staple fibers (hereinafter also referred to as latent bulky acrylic blended yarn). There are two methods: a method in which the latent bulky acrylic blend yarn is subjected to a shrinkage treatment after being woven into a woven fabric, and then subjected to a shrinkage treatment. In the former method, since the shrinkage treatment is performed after the fabric is made, it is necessary to take into account changes in the dimensions of the fabric and changes in weave density due to shrinkage, making it difficult to design the fabric. On the other hand, in the latter method, yarns that have already been subjected to shrinkage treatment are used for weaving, so the above-mentioned difficulties in textile design can be avoided. Moreover, since shrinkage treatment can be performed using a yarn dyeing process, the bulky acrylic fabric of the present invention can be obtained more easily.

Examples of shrinkage treatment methods for the former method include a method in which a fabric woven from the above-mentioned latent bulky acrylic blend yarn is immersed in boiling water for 20 minutes or more, and a method in which the fabric is subjected to dry heat treatment at 160° C. for 1 minute or more in an expanded state. can.

The shrinkage treatment method in the latter method is to immerse the above-mentioned latent bulky acrylic blend yarn in hot water at 80 to 100°C for 10 minutes or more, followed by cooling at a rate of 1°C/min or less under no tension. An example of this method is to perform a slow cooling process. In this method, in the first half of the process, the temporary set state in which the shrinkage is latent is released, and the shrinkage gradually appears during the slow cooling process in the second half. If it were to be rapidly cooled in the latter half of the process, the structure would be rapidly fixed, making it impossible to achieve sufficient contraction. Note that, as described above, the shrinkage treatment may be performed as part of the dyeing process.

Further, the English cotton count of the latent bulky acrylic blend yarn is preferably 6 to 80, more preferably 10 to 70. If the English cotton count is less than the above lower limit, the yarn may be too thick and the characteristic of swelling may be difficult to feel, and if it exceeds the upper limit, the yarn may be too thin and the bulkiness may be insufficient.

Further, the twist coefficient of the latent bulky acrylic blend yarn is preferably 2.7 to 4.0, more preferably 3.0 to 3.5. If the twist coefficient is less than the above lower limit, the yarn strength will be low and yarn breakage or thread slippage will occur easily, and if it exceeds the upper limit, the twisting will be restricted too strongly and shrinkage of the shrinkable acrylic short fibers will be inhibited, resulting in bulkiness. may be insufficient.

EXAMPLES Hereinafter, the present invention will be explained in detail with reference to Examples, but the present invention is not limited to these Examples. Note that the measurement method used for evaluation in the examples is as follows. In addition, parts and percentages in the examples are expressed on a weight basis unless otherwise specified.

<Boiling water shrinkage rate>
A load (0.1 g/dtex) is applied to the sample before boiling water treatment, the original length (L1 [mm]) at regular intervals is measured, the sample is treated with boiling water for 15 minutes, and after drying, a load is applied to the sample. (0.1 g/dtex), measure the length of change (L2 [mm]), and calculate the shrinkage rate using the following formula.
Boiling water shrinkage rate (%) = {(L1-L2)/L1}×100

<Fineness>
Obtained according to JIS L 1015:2010 8.5.

<English cotton count>
Obtained according to JIS L 1095:2010 9.4.1.

<Twist coefficient>
The twist coefficient is calculated from the following formula from the English cotton count Ne determined according to the previous section and the number of twists per inch T determined according to method A of JIS L 1095:2010 9.15.1.
Twist coefficient = T/(Ne) ^1/2

<Specific volume ratio>
According to the method described in JIS L 1096:2010 8.5 Bulkness, the bulkiness (hereinafter also referred to as specific volume) [cm ³ /g] of the measured fabric sample and the comparative fabric sample is measured. The ratio [%] of the specific volume of the measured fabric sample to the specific volume of the comparison fabric sample is calculated, and this is defined as the specific volume ratio. The comparison fabric sample is a fabric made in the same manner except that the shrinkable acrylic short fibers used in the fabrication of the measurement fabric sample were replaced with the non-shrinkable staple fibers used in the fabrication of the measurement fabric sample. It is.

<Texture (softness), brushed feel>
The texture and nap of each fabric sample were evaluated by five skilled technicians on the following five scales, and the evaluation with the highest rating was taken as the evaluation result.
Very good: ◎, Good: ○, Fairly good: △, Fairly poor: △△, Bad: ×

[Example 1]
Shrinkable acrylic short fibers (manufactured by Nippon Exlan Kogyo Co., Ltd., boiling water shrinkage rate 38%, 1 dtex, 38 mm) and non-shrinkable acrylic short fibers (manufactured by Nippon Exlan Kogyo Co., Ltd., boiling water shrinkage rate 3%, 0.5 dtex, 32 mm) :65 weight ratio in a drawing step, and ring-spun to obtain a latent bulky acrylic blend yarn with an English cotton count of 24 and a twist coefficient of 3.0. This latent bulky acrylic blend yarn is immersed in 100°C hot water for 20 minutes, then slowly cooled to room temperature at a cooling rate of 0.5°C/min under no tension, and dried to produce English cotton. A bulky acrylic blend yarn with a count of 15.6 was obtained. Next, using a cotton spun yarn of English cotton count 20 for the warp and the bulky acrylic blend yarn for the weft, the bulky acrylic yarn was woven into a 2/2 twill weave with a warp density of 70 threads/inch and a weft density of 53 threads/inch. Created a textile.

[Example 2]
A bulky acrylic fabric was obtained in the same manner as in Example 1, except that the weight ratio of shrinkable acrylic short fibers and non-shrinkable acrylic short fibers was changed to 50:50. The English cotton count of the bulky acrylic blend yarn in this example was 15.6.

[Example 3]
A bulky acrylic fabric was obtained in the same manner as in Example 1, except that the weight ratio of shrinkable acrylic short fibers and non-shrinkable acrylic short fibers was changed to 25:75. The English cotton count of the bulky acrylic blend yarn in this example was 16.2.

[Example 4]
A bulky acrylic fabric was obtained in the same manner as in Example 1, except that the shrinkable acrylic short fibers were changed to shrinkable acrylic short fibers (manufactured by Nippon Exlan Kogyo Co., Ltd.) with a boiling water shrinkage rate of 20%, 0.9 dtex, and 38 mm. . The English cotton count of the bulky acrylic blend yarn in this example was 19.7.

[Example 5]
Shrinkable acrylic short fibers (manufactured by Nippon Exlan Kogyo Co., Ltd., boiling water shrinkage rate 38%, 1 dtex, 38 mm) and non-shrinkable acrylic short fibers (manufactured by Nippon Exlan Kogyo Co., Ltd., boiling water shrinkage rate 3%, 0.5 dtex, 32 mm) :65 weight ratio in a drawing process, and ring spinning was performed to obtain a latent bulky acrylic blend yarn with an English cotton count of 70 and a twist coefficient of 3.0. This latent bulky acrylic blend yarn is immersed in 100°C hot water for 20 minutes, then slowly cooled to room temperature at a cooling rate of 0.5°C/min under no tension, and dried to produce English cotton. A bulky acrylic blend yarn with a count of 45.5 was obtained. Next, using a cotton spun yarn of English cotton count 50 for the warp and the bulky acrylic blend yarn for the weft, the bulky acrylic yarn was woven into a 4/1 satin weave with a warp density of 145 threads/inch and a weft density of 90 threads/inch. Created a textile.

[Example 6]
Shrinkable acrylic short fibers (manufactured by Nihon Exlan Kogyo Co., Ltd., boiling water shrinkage rate 38%, 1 dtex, 38 mm) and non-shrinkable acrylic short fibers (manufactured by Nippon Exlan Kogyo Co., Ltd., boiling water shrinkage rate 3%, 1.7 dtex, 38 mm) :65 in the drawing process, and ring-spun to obtain a latent bulky acrylic blend yarn with an English cotton count of 16 and a twist coefficient of 3.0. This latent bulky acrylic blend yarn is immersed in 100°C hot water for 20 minutes, then slowly cooled to room temperature at a cooling rate of 0.5°C/min under no tension, and dried to produce English cotton. A bulky acrylic blend yarn with a count of 10.4 was obtained. Next, a 3/1 twill weave is made of bulky acrylic yarn using an English cotton count 12 spun yarn for the warp and the bulky acrylic blended yarn for the weft, with a warp density of 90 yarns/inch and a weft yarn density of 48 yarns/inch. Created a textile.

[Comparative example 1]
A woven fabric was obtained in the same manner as in Example 1, except that the shrinkable acrylic short fibers were replaced with non-shrinkable acrylic short fibers (manufactured by Nippon Exlan Kogyo Co., Ltd., boiling water shrinkage rate 3%, 1 dtex, 38 mm). The English cotton count of the acrylic blend yarn after shrinkage treatment in this comparative example was 24. In addition, in the measurement of the specific volume ratio of the fabric of Comparative Example 1, the non-shrinkable acrylic staple fiber (manufactured by Japan Exlan Kogyo Co., Ltd., boiling water shrinkage rate 3%, 1 dtex, 38 mm) was used as a comparative fabric sample. A woven fabric was used that was made using spun yarn replaced with acrylic short fibers (manufactured by Nippon Exlan Kogyo Co., Ltd., boiling water shrinkage rate 3%, 0.5 dtex, 32 mm).

[Comparative example 2]
A woven fabric was obtained in the same manner as in Example 1, except that the weight ratio of shrinkable acrylic short fibers and non-shrinkable acrylic short fibers was changed to 15:85. The English cotton count of the acrylic blend yarn after the shrinkage treatment in this comparative example was 16.8.

[Comparative example 3]
A woven fabric was obtained in the same manner as in Example 1, except that the weight ratio of shrinkable acrylic short fibers and non-shrinkable acrylic short fibers was changed to 65:35. The English cotton count of the acrylic blend yarn after shrinkage treatment in this comparative example was 15.6.

Table 1 shows the results of evaluating the fabrics in each Example and Comparative Example.

In Examples 1 to 6, bulky fabrics with good specific volume ratio, texture, and nap feeling were obtained. On the other hand, in Comparative Examples 1 and 2, the shrinkable acrylic fiber was not used or the amount used was too small, so the specific volume ratio was low and sufficient bulkiness could not be obtained. Furthermore, in Comparative Example 3, since the amount of shrinkable acrylic fibers used was too large, the amount of fibers arranged on the surface layer of the yarn after shrinkage was reduced, resulting in a poor sense of swelling.

Claims (7)

A bulky acrylic blend yarn containing 20 to 60% by weight of shrinkable short acrylic fibers and 40 to 80% by weight of non-shrinkable short fibers, with the non-shrinkable short fibers protruding from the surface , is used as at least part of the weft. The bulky acrylic yarn is characterized in that all of the warp yarns are non-shrinkable spun yarns or long fibers, and the English cotton count of the bulky acrylic blended yarn used for the weft yarn is equal to or lower than the English cotton count of the warp yarn. fabric. In place of the bulky acrylic blended yarn in the bulky acrylic fabric, a spun yarn in which the shrinkable acrylic short fibers of the bulky acrylic blended yarn were replaced with the same fibers as the non-shrinkable short fibers was used. The bulky acrylic fabric according to claim 1, wherein the bulky acrylic fabric has a specific volume ratio of 120% or more relative to a similar fabric. The bulky acrylic fabric according to claim 1 or 2 , wherein the shrinkable acrylic short fibers are shrinkable acrylic short fibers having a boiling water shrinkage rate of 15 to 45%. The bulky acrylic fabric according to any one of claims 1 to 3, wherein the non-shrinkable short fibers contain non-shrinkable acrylic short fibers with a fineness of 1.0 dtex or less. The bulky acrylic fabric according to any one of claims 1 to 4 , wherein the bulky acrylic blend yarn is a long and short composite yarn having polyurethane long fibers as a core. The bulky acrylic fabric according to any one of claims 1 to 5 , which is a denim fabric. An acrylic blend yarn containing 20 to 60% by weight of shrinkable acrylic staple fibers with a boiling water shrinkage rate of 15 to 45% and 40 to 80% by weight of non-shrinkable staple fibers is treated with hot water at 80 to 100°C for 10 minutes or more. The method is characterized in that the bulky acrylic blend yarn obtained by a manufacturing process including a shrinkage development step and a slow cooling step at a cooling rate of 1° C./min or less under no tension is used for at least a portion of the weft yarn. A method for producing bulky acrylic fabric.