JP2009155774A - Textile structure and manufacturing method thereof - Google Patents

Abstract

[PROBLEMS] To provide a soy protein fiber structure having an excellent stretch property when wet by making full use of the wet swellability of soy protein fiber, and a method for producing a soy protein fiber structure capable of efficiently producing the soy protein fiber structure. To do.
A fiber structure mainly composed of soy protein fibers, wherein the structure has a wet elongation ratio of 15% to 300% and / or an elongation recovery ratio of 70% or more. It is a protein fiber structure, and after forming fibers mainly composed of soy protein fiber into a fiber structure such as yarn, woven fabric, knitted fabric, etc., after scouring at the processing stage, it is subjected to wet heat treatment in advance. A method for producing a soy protein fiber structure, characterized by shrinking in the length direction by 20% to 70% and then finishing.
[Selection figure] None

Description

  The present invention relates to a fiber structure that exhibits good stretchability under wet conditions and a production method that can efficiently produce the fiber structure.

  In recent years, woven and knitted fabrics typified by a textile structure for garments have been demanded for garments with higher functionality in accordance with the trend toward comfortable living. In particular, the stretchability of the woven or knitted fabric is easy to move and provides a good feeling of comfort because the fabric stretches following the movement of the body. In the body part, the elongation of the skin, particularly at the elbows, knees, and arms where bending is easy, is 72% at the maximum, and the stretch rate of the fabric to be followed is required to be large. In response to these demands, spandex (polyurethane) and polyester temporary processed yarns as synthetic fiber materials, and crimped yarns such as polytrimethylene terephthalate are introduced in recent years.

  However, although these stretch materials are effective in normal wearing conditions (dry conditions), the coefficient of friction between the material and water increases in shirts when sweated or swimwear when wet. The actual condition is that when the fabric is stretched, it is hard to satisfy and the comfort is not satisfactory. On the other hand, there is rayon or the like as a material that swells in a wet state, but the stretch rate is about 10% at the maximum, the stretch recovery rate is about 50%, and the stretch performance is low and cannot be handled.

  On the other hand, the present invention uses soy protein fiber. The production method and characteristics of the fiber will be described below.

  The fiber is a raw cotton produced by extracting protein from soybean koji and blending it with about 75-80% of polyvinyl alcohol, wet spinning, and then acetalizing. This fiber has several kinds of amino acids of protein, and the cross section of the fiber has a dumbbell-shaped flat cross section, so that it has an elegant soft texture and luster of cashmere tone. Further, since there are fine grooves on the side surface of the fiber, there is a feature that it has water absorption and further has moisture absorption similar to cotton. In practice, this raw cotton is spun and used as a woven or knitted fabric. Moreover, since this fiber can extract protein from squeezed rice cake and can use this residue for fertilizer and feed, it has the merit of the resource saving material of using up all the soybean raw materials.

  However, such fibers are characteristic materials in terms of texture and raw material, but those finished by ordinary processing (dyed at 85 ° C to 98 ° C) have almost no stretchability in the normal state (dry state). Absent. Moreover, the stretch property at the time of wetness is 10 to 13% at most, and there is no feature at present. In addition, although there is no known literature, information, etc. regarding a method of improving stretchability (dry state) using the fiber, the following (1) to (3) are general countermeasures considered in the industry. To

(1) A method of mechanically imparting a large amount of crimp during the production of this raw cotton and raising the stretch This method is effective for thermoplastic fibers such as polyester and polyamide, but this fiber is hydrophilic with poor thermoplasticity. Since it contains a large amount of polyvinyl alcohol and its heat resistance is as low as 130 ° C., it cannot be expected to impart stretchability because the crimped form cannot be fixed (set).
(2) Method for imparting stretch properties by temporarily processing spun yarn Since this fiber does not have heat setting properties, it cannot impart crimps from provisional reasons for the same reason as in (1) above. .
(3) Method of imparting stretch properties by twisting a spun yarn Because of the same reason as in (1) above, a twist stop set cannot be provided, so stretch properties cannot be imparted. Further, twisting of the twisted yarn (snaal) is generated, and it is difficult to weave or knitting.

  As described above, the soybean protein fiber cannot sufficiently cope with the stretchability when wet in the fiber structure of yarn, woven fabric, and knitted fabric.

In addition, as a prior art regarding soybean protein fiber, for example, there is Patent Document 1, but there is no related one relating to stretchability as in the present invention.
JP-T-2005-513298

  The objective of this invention is providing the soybean protein fiber structure which has the favorable stretch property at the time of moisture, and its manufacturing method in view of the point mentioned above.

  More specifically, the object of the present invention is to fully utilize the wet swelling property of soy protein fiber, soy protein fiber structure having excellent stretchability when wet, and soy protein that can be efficiently produced. It is providing the manufacturing method of a fiber structure.

In order to achieve the above-described object, the soybean protein fiber structure of the present invention has the following configuration (1).
(1) A fiber structure mainly composed of soy protein fibers, wherein the structure has a wet elongation rate of 15% to 300% and / or an elongation recovery rate of 70% or more. Fiber structure.

In addition, in the soy protein fiber structure of the present invention, it is more preferable that the structure has any one of the following (2) to (4).
(2) The soybean protein fiber structure according to (1) above, wherein the soybean protein fiber structure is a short fiber.
(3) The soybean protein fiber structure according to (1) or (2) above, wherein the soybean protein fiber is contained in an amount of 30% or more by weight.
(4) The soybean protein fiber structure according to any one of the above (1) to (3), wherein the soybean protein fiber structure is any one of a yarn, a woven fabric, and a knitted fabric.

Moreover, the manufacturing method of the soybean protein fiber structure of this invention which achieves the objective mentioned above has the structure of the following (5).
(5) After forming fibers mainly composed of soy protein fibers into fiber structures such as yarns, woven fabrics, and knitted fabrics, and after scouring at the processing stage, wet heat treatment is performed in advance in the length direction of the fiber structures. A method for producing a soy protein fiber structure, which is contracted by 70% and then finished.

Moreover, in the manufacturing method of the soybean protein fiber structure of the present invention, more preferably, the soybean protein fiber structure has any one of the following constitutions (6) to (9).
(6) The method for producing a soybean protein fiber structure according to (5) above, wherein the wet heat treatment is a hydrothermal treatment at 90 ° C. to 125 ° C.
(7) The soybean protein fiber structure according to (5) or (6) above, wherein the wet heat treatment is a liquid mainly composed of water and is treated with hot water at a liquid temperature of 105 ° C to 125 ° C. Manufacturing method.
(8) The method for producing a soybean protein fiber structure according to (5) or (6) above, wherein the wet heat treatment is performed at 90 ° C. to 110 ° C. with a liquid containing benzyl alcohol.
(9) The soybean protein fiber structure is any one of a yarn, a woven fabric, and a knitted fabric, and has been subjected to wet heat treatment and finished, and is described in any one of (5) to (8) above A method for producing a soy protein fiber structure.

  ADVANTAGE OF THE INVENTION According to this invention, the fiber structure which has the stretch property which was excellent in the wetness with the soybean protein fiber which was not obtained by the prior art, and the method of manufacturing this efficiently can be provided.

  Hereinafter, the present invention will be described in more detail.

  The soy protein fiber used in the present invention includes 15-30% by weight of a soy protein component obtained by extracting protein from bean pomace and 70-85% by weight of a polyvinyl alcohol component. And long fibers can be preferably used. The polyvinyl alcohol component may contain other small amount of components as required.

  The method for producing soy protein fibers is not particularly limited, but there is a wet spinning method exemplified in JP-T-2005-513298. That is, the short fiber (raw cotton) is blended with the above two components to form a spinning dope. After degassing this, it is spun into a sodium sulfate coagulation solution and stretched about twice. Further, the film is stretched about 1.5 times in the bath. Next, the film is further stretched 2 to 5 times in a dry-dry heat process. In this method, the drawn yarn is subjected to acetalization treatment, washed, oiled, dried, crimped, and the fiber is cut to obtain raw cotton.

  Usually, soy protein fibers are made of a lot of short fibers (raw cotton). In this case, the single fiber fineness is usually a general-purpose single fiber fineness of 1.1 to 1.6 T (decitex), particularly stretchability. There is no problem. Regarding the fiber length (cut length), the usual 38 mm (for short fiber spinning) to 64 mm (for long fiber spinning) has no particular problem.

  The present invention is a fiber structure mainly composed of such soybean protein fibers, and it is necessary that the structure has a wet elongation ratio of 15% to 300% and / or an elongation recovery ratio of 70% or more. . Here, the measurement of the form, elongation rate, and elongation recovery rate of the soy protein fiber structure was evaluated by the measurement method defined below.

(A) Elongation rate in the case of yarn (spun yarn, long fiber yarn, etc.) was measured and evaluated according to “single yarn tensile strength and elongation rate” when wet according to Section 9.5.2 of JIS L 1095 Say. Further, the elongation recovery rate refers to an evaluation of the yarn in accordance with JIS L 1096, section 8.14.2, “A stretch recovery rate of woven fabric” of Method A.
(B) Elongation rate in the case of woven fabric is JIS L 1096 section 8.14.1, Method A “Elongation rate of woven fabric”, and elongation recovery rate is 8.14.2 Section A, method A. According to the “elongation recovery rate of woven fabric”, the warp direction and the weft direction of the woven fabric are measured and evaluated.
The wetness was evaluated according to JIS L 1096, paragraph 8.12.2, “Test when wet”.
(C) The elongation rate in the case of a knitted fabric follows the “elongation rate of knitted fabric” in 8.14.1 of JIS L 1018. Here, the constant elongation was set to 80%. The elongation recovery rate is a value measured and evaluated in accordance with Section 8.15.1, Method A “Elongation modulus of knitted fabric”.
The wetness was evaluated according to the evaluation of the fabric, according to JIS L 1096, section 8.12.2, “Test when wet”.

  What is important in the present invention is that the stretch rate when the structure is wet is 15% to 300% and / or the stretch recovery rate is 70% or more in this evaluation. This is in the form of a fiber structure. This means that excellent stretchability is achieved. Specifically, for example, a yarn such as a spun yarn does not have an elongation due to a structural form such as a woven fabric or a knitted fabric. Therefore, the elongation ratio is 15% to 100%, the woven fabric is 50% to 200%, and the knitted fabric is Although the absolute values are different, such as 80% to 300%, both are excellent elongations.

  When the elongation ratio is less than 15%, the elongation is small and the stretchability is insufficient. Further, those exceeding 300% are not necessary for general clothing use, and there is a limit to the swelling property of soybean protein fibers, which is difficult to obtain.

  On the other hand, those having an elongation recovery rate exceeding 70% are preferable because they have a high elongation recovery and an excellent stretch back property. Particularly preferred is 75% to 100%. Those having an elongation recovery rate of less than 70% are not preferable because they have poor recoverability and wrinkles or sagging of the fabric called “laughter” occurs.

  As the fiber form of the soy protein fiber, either short fiber or long fiber may be used, but the short fiber is in a state where the single fibers are entangled with each other, so that the swellability of the single fibers is not hindered. It is particularly preferable since good stretchability and soft texture can be obtained.

  In the present invention, it is preferable that at least 30% or more of soy protein fibers are contained in the fiber structure because particularly excellent stretch properties can be obtained. Such properties are most preferable when the soy protein fiber is 100%, but may be appropriately combined with other fibers from the viewpoint of use, design, and target stretch properties. In this case, the method for combining soybean protein fibers is not particularly limited. For example, in the case of yarns such as spun yarns, there are blending and twisting with other fibers, which may be used as they are for woven fabrics and knitted fabrics. . In addition, a woven fabric or a knitted fabric obtained by interweaving yarn of 100% soy protein fiber with other fibers is also a preferable form.

  In the present invention, the soy protein fiber structure is not particularly limited to cotton, yarn, string, woven fabric, knitted fabric, nonwoven fabric, etc., but the yarn, woven fabric, Any form of knitted fabric is preferred. Among them, spun yarns are recommended for yarns, plain weaves, twills, and satin weaves for woven fabrics, and round knitting such as smooth, Milan ribs, and tentacles, and warp knitting and weft knitting for knitting.

  Next, the manufacturing method of the fiber structure concerning this invention is demonstrated.

  In the present invention, after forming fibers mainly composed of soy protein fibers into structures such as yarns, woven fabrics, and knitted fabrics, and after scouring in the processing step, wet heat treatment is performed in the length direction of the fiber structures. It is necessary to shrink 20% to 70% and then finish.

  The processing of the present invention will be specifically described.

Structures such as yarns, woven fabrics and knitted fabrics using soy protein fibers contain fiber oils and sizing agents in woven fabrics, and are first refined to remove them. The scouring conditions are carried out in accordance with a conventional method using a general scouring agent and a weak alkaline solution at a temperature × time of 96 ° C. × 3 minutes. Woven fabrics and knitted fabrics are processed in a continuous manner, and yarns are batch processed. The shrinkage of the length of the structure by this scouring is at most 3% or less and is extremely small.
Next, the wet heat treatment of the present invention is performed and dried. Drying uses a low tension dryer that does not apply excessive tension to fabrics and knitted fabrics. For example, a short loop dryer widely used is performed at 120 to 130 ° C. in about 3 minutes. If the yarn is crushed, use a suspension dryer. In the case of small pieces, air-dry.

  What is important here is that after such scouring, wet heat shrinkage treatment is performed, and the shrinkage ratio of the length of the structure when dried is not shrunk to at least 20% or more compared to before the wet heat treatment, The stretch effect of the present invention cannot be obtained, and if it exceeds 70%, the fiber becomes hard, which is not preferable. The shrinkage is a dimensional change rate of the length of the fiber structure before and after the wet heat treatment. Specifically, the yarn is in the length direction, the fabric is in the warp and weft directions, and the knitted fabric is in the well: width direction. Course: Required in the length direction.

  In the present invention, the shrinkage rate refers to the shrinkage rate in the direction of the constituent yarn in which soybean protein fiber is used. For example, a 100% soy protein fiber used, or a mixed yarn with other fibers, a laid twisted yarn, etc., has the same shrinkage ratio, but a woven fabric woven only in one direction is soybean in the woven fabric. The shrinkage rate in the direction in which protein fibers are used.

As a specific method for measuring the shrinkage rate, the fiber structure is scoured / dried, and a certain length is marked in that state. Next, after wet-heat treatment and drying, the length of the marking portion is measured to determine the shrinkage rate.
The shrinkage rate of the wet heat treatment is calculated by the following formula.
S (%) = {L0−L1 / L0} × 100
Here, S: shrinkage ratio (%) of the length of the yarn, woven fabric, and knitted fabric after wet heat treatment, L0: length (cm or m) of original size before wet heat treatment (after scouring), L1: wet heat treatment / It represents the length (cm or m) after drying.

  Detailed conditions such as the measurement load of the spun yarn and the length measurement method of the woven fabric and the knitted fabric will be described in Examples described later.

  The wet heat treatment method according to the present invention may be either hot water or steam treatment, but hot water treatment is preferred from the viewpoint of uniform treatment without unevenness and heat treatment efficiency.

  A high-temperature liquid dyeing machine with high versatility can be used as a fabric and knitting machine. In the case of yarns (spun yarns), it is preferable to apply an injection-type waste dyeing machine that treats the spun yarn in a crushed state as a device that greatly contracts with low tension.

  The temperature of the wet heat treatment is not particularly limited as long as such a shrinkage rate can be obtained, but it is preferably a hydrothermal treatment at 90 ° C. to 125 ° C. from the viewpoint of shrinkage rate, stretchability, and texture. It is a condition. Furthermore, treatment at 110 ° C. to 120 ° C. is more preferable because the shrinkage can be stabilized.

  If the treatment is performed at a temperature lower than 90 ° C., sufficient shrinkage cannot be obtained, and if the treatment temperature exceeds 125 ° C., the texture becomes hard and the strength is lowered.

  Further, the wet heat treatment is preferably performed at 90 ° C. to 110 ° C. with a liquid containing benzyl alcohol. This is a preferred method because benzyl alcohol swells soy protein fibers greatly and a large shrinkage is obtained, and since it is processed in a low temperature region, it does not cause texture hardening or strength reduction. A phenolic agent other than benzyl alcohol is also conceivable as a swelling agent and may be applied, but benzyl alcohol is most preferable from the viewpoint of workability and wastewater treatment.

  Since the setting of such processing conditions varies depending on the mixing ratio of soybean protein fibers, fiber structure form, etc., any processing temperature and processing solution are appropriately selected so that the shrinkage is 20% to 70% in any case.

  Next, drying is performed after the wet heat treatment, and the shrinkage rate in the wet heat treatment is measured. Drying is performed using the short loop dryer or the suspension dryer.

Next, finishing is performed, and finishing in the present invention is defined as a process after dyeing including dyeing after wet heat treatment / drying. Various examples of finishing processes after wet heat treatment / drying are as follows:
a. Dyeing-drying-finishing set b. Dyeing-drying-resin processing-finishing set (resin processing: anti-static processing, softener processing, raising processing, calendar processing, water repellent processing, water absorption processing, membrane processing, etc.)
c. (Moist heat treatment / drying)-Finishing set (when not dyed)
d. (Moist heat treatment / drying)-Finishing set-Print dyeing-(Resin processing)-Finishing set (when printing dyeing)
Etc.

  Thus, after the wet heat treatment, the soy protein fiber structure is finished as it is or dyed and finished.

  In the case of dyeing, when an acid dye or a direct dye is used, the dye is dyed at a normal dyeing temperature of 85 to 98 ° C., and with a reactive dye at 40 to 80 ° C. In the case of print dyeing, dyeing is performed by steaming at the same temperature. After dyeing, finish with a finishing set, with or without the usual finishing agent. The finishing set is preferably performed so as to maintain the shrinkage of the wet heat treatment without applying excessive tension in a low temperature region. Specifically, it is preferable to set it with a slight relaxation in the vertical and horizontal directions at a dry heat of 140 to 150 ° C.

  The present invention includes so-called pre-dyeing, dyeing cotton or spun yarn of soybean protein fiber, and then performing the wet heat treatment and finishing.

  As described above, according to the present invention, it is possible to provide a fiber structure having excellent stretchability when wet with soy protein fibers, and a method for efficiently producing the same, which was not obtained by the prior art.

  Although the use of the fiber structure of the present invention is not limited, sportswear such as shirts and fitness wear, outdoor wear, casual wear, etc. when sweating are optimal for clothing, and swimwear Suitable for applications. For materials, water filter cloth, air filter, mask and the like are preferable.

  Hereinafter, the present invention will be described more specifically with reference to examples. The measuring method of physical properties is as follows.

1. Evaluation of elongation rate and elongation recovery rate of fiber structure The elongation rate and elongation recovery rate of the fiber structure were measured by the following methods. In addition, the higher the stretch rate and the stretch recovery rate, the better the stretchability and the better. Moreover, the measuring machine was measured with "Autograph" AGS-10KNG (manufactured by Shimadzu Corporation).
A. In the case of spun yarn (scouring-wet heat treatment-air dried product)
The elongation rate was measured and evaluated according to the “single yarn tensile strength and elongation rate” when wet according to Section 9.5.2 of JIS L 1095. Further, the elongation recovery rate was evaluated according to JIS L 1096, Section 8.14.2, Method A “Elongation recovery rate of woven fabric”.
B. In the case of textiles (scouring-wet heat treatment-drying-dyeing-finishing set)
Elongation rate is in accordance with 8.14.1 of JIS L 1096, “Elongation rate of fabric” in Method A, and elongation recovery rate is in accordance with Item 8.14.2, “Elongation recovery rate of fabric” in Method A. The warp direction and the weft direction of the fabric were measured and evaluated.
The wetness was evaluated according to JIS L 1096, paragraph 8.12.2, “Test when wet”.
C. For knitted fabrics (scouring-wet heat treatment-drying-dyeing-finishing set)
The elongation rate follows the “elongation rate of knitted fabric” in 8.14.1 of JIS L 1018. Here, the constant elongation was set to 80%. In addition, the elongation recovery rate was measured and evaluated according to Section 8.15.1, “Elongation modulus of knitted fabric” of Method A.
The wetness was evaluated according to the evaluation of the fabric, according to JIS L 1096, section 8.12.2, “Test when wet”.

2. Measurement of shrinkage ratio in wet heat treatment of fiber structure Spun yarn, woven fabric and knitted fabric are scoured (96 ° C. × 3 minutes), and dried to measure the original size. Next, wet heat treatment / drying was performed, the original length was measured, and the shrinkage rate in the wet heat treatment was measured by the following formula. The higher the shrinkage rate, the better the stretchability of the finished product when wet.
S (%) = {L0−L1 / L0} × 100
Here, S: length shrinkage ratio (%) of the yarn, woven fabric, and knitted fabric after wet heat treatment
L0: full length (cm or m) before wet heat treatment (after scouring),
L1: length after wet heat treatment / drying (cm or m),
(1) Measurement of yarn (spun yarn) Measurement of yarn (spun yarn) was carried out by taking 5 pieces of 100cm, performing the above-mentioned scouring / air drying, applying a load of 0.1 centnewton per decitex, Mark the part with a length of 50 cm to make it the original size. Next, wet heat treatment / air-drying is performed, the length is measured by applying the same load, and the shrinkage ratio (%, average value of 5 pieces) in the wet heat treatment is obtained by the above formula.
(2) Measurement of woven fabrics and knitted fabrics The measurement of woven fabrics and knitted fabrics was carried out by drying the above-mentioned scouring / short loop dryer (120 ° C x 3 minutes), and using the oblique inspection machine, the weft direction of the fabric was full width. (Cm) is measured. The vertical direction is the original size by marking the center of the fabric with a length of 20 m. Next, wet heat treatment / drying is performed, the length of the full width and the length in the warp direction are measured with the same inspection machine, and the shrinkage ratio (%) in the wet heat treatment is obtained by the above formula.

Example 1 (Methods 1 and 2 of the present invention)
(A) Preparation of raw cotton The raw cotton of soybean protein fiber manufactured based on Example 1 of Japanese translations of PCT publication No. 2005-513298 gazette was used. That is, protein was extracted from soybean meal, and 21% of this component and 79% of polyvinyl alcohol were blended to obtain a spinning dope. This was deaerated and then spun into a 45% sodium sulfate coagulation solution and stretched 2.1 times. Furthermore, it extended | stretched 1.6 time with this bath continuously. Next, after drying, the film was further stretched 4.2 times in a 220 ° C. dry heat process. The drawn yarn was acetalized with 20% glyoxal and 2% ammonium sulfate bath, washed, oiled, dried, crimped, and cut into fibers to obtain raw cotton.
The obtained raw cotton had a composition of 21% soy protein and 79% polyvinyl alcohol. The fineness and cut length of the raw cotton were 1.3 dtex and 38 mm. This was bleached with a hydrogen peroxide solution, dried with a spinning oil.
The physical properties of the exposed raw cotton were strength (dry): 3.5 centinewton / dtex, elongation: 17.8%, boiling water shrinkage: 2.1%.
(B) Spinning process After the raw cotton of soybean protein fiber was added and a 260 gelen / 6 yd sliver was obtained in the card process, 8 slivers were doubled and a draft of 7.4 times was applied in the drawing process. . The sliver obtained by repeating this drawing process twice was subjected to a draft of 6.6 times in the roving process to obtain a 1.43S roving. This roving was drafted 40 times in the spinning process. The spinning count is 40th single yarn. The mixing ratio was 100% by weight of soybean protein fiber.
(C) Weaving process The soy protein fiber spun yarn 40 is used as the weft, nylon 6 (monofilament): 22 dtex, 1 filament is used as the warp, and the warp yarn is rotated at 330 r · p · m in the air jet loom. Weaved into a plain weave with a density of 105 / 吋 and a weft density of 60 / 吋, a width of 212.5 cm and a length of 52.9 m.
(D) Wet heat treatment / finishing The fiber structure (green machine) was scoured in an expanded form. As a scouring machine, “Softer” (manufactured by Nissen Co., Ltd.) was used and treated at 96 ° C. for 3 minutes. Next, it was dried at 120 ° C. for 3 minutes with S • S • D (manufactured by Nissen Co., Ltd.), a short loop dryer. Subsequently, this fabric was subjected to wet heat treatment with a liquid dyeing machine (manufactured by Nisaka Seisakusho). The treatment solution was treated with an benzyl alcohol 8% solution at 100 ° C. for 20 minutes (Method 1 of the present invention). The treatment liquid was treated with water alone at 120 ° C. for 20 minutes (Method 2 of the present invention). Drying after the wet heat treatment was performed under the same conditions as scouring. The shrinkage rate in the wet heat treatment was determined based on the “measurement of the shrinkage rate in the wet heat treatment of the fabric” in the item (2) of the “measurement of the shrinkage rate in the wet heat treatment of the fiber structure” described above. Was 60.5% in the weft direction, and Method 2 of the present invention was 44.3% in the weft direction.
In addition, the finish after a process dye | stained with the liquid flow dyeing machine at 98 degreeC * 40 minutes using the red acidic metal-containing dye. After staining, fix treatment was performed according to a conventional method.
After dyeing, the finish was set at 140 ° C. and finished. Further, the elongation rate and elongation recovery rate of this finished product were evaluated according to the above-mentioned “B. In case of woven fabric”.
Table 1 shows the evaluation results of the obtained woven fabric.

Comparative Example 1
As Comparative Example 1, scouring, wet heat treatment, drying (measuring shrinkage), dyeing, and finishing set were performed in the same manner as in Example 1 except that the wet heat treatment was performed at 85 ° C. for 20 minutes with only water. . The shrinkage rate of the wet heat treatment, the elongation rate of the finished product, and the elongation recovery rate were similarly evaluated.
The evaluation results of the resulting fabric are also shown in Table 1.

Comparative Example 2
As Comparative Example 2, only the scouring was performed without subjecting the raw machine to wet heat treatment. Thereafter, it was dyed with a liquid dyeing machine at 98 ° C. in the same manner as in Example 1 and finished in the same manner.
In this case only, the wet heat shrinkage was measured by the shrinkage after dyeing / drying. Then, it dye | stained and finished according to Example 1, and evaluated elongation rate and elongation recovery rate similarly.
The evaluation results of the resulting fabric are also shown in Table 1.

Example 2 (Methods 3 and 4 of the present invention)
(A) Preparation of raw cotton The same one as used in Example 1 was used.
(B) Spinning process After obtaining 100% by weight of the soy protein fiber raw cotton of Example 1 in the curd process, 240 selenium / 6 yd sliver was obtained, and then, eight slivers were doubled and 8.0 times in the drawing process. I drafted it. The sliver obtained by repeating this drawing process twice was subjected to a draft of 6.0 times in the roving process to obtain a 1.25S roving. The roving thus obtained was subjected to a draft of 40 times in the fine spinning process to obtain a spun yarn. Spinning number is 50 (116.9 dtex), single yarn.
(C) Wet heat treatment Five 100 cm soy protein fiber spun yarns of this fiber structure were collected, refined under the above conditions, and air-dried. Next, wet heat treatment is performed by lightly winding a cylindrical basket called a carrier (5 baskets prepared by winding one basket of 100 cm) into a metal dyeing pot together with the treatment solution, and a small pot dyeing machine (Teksam Giken ( The product was manufactured using The treatment liquid was treated at 100 ° C. for 20 minutes while changing the benzyl alcohol solution concentration to 2.0 to 10.0% by weight (Method 3 of the present invention). Further, the treatment liquid was changed to only water and the treatment temperature was similarly changed to 110 to 125 ° C. (Method 4 of the present invention). All were air-dried after the treatment. The shrinkage rate in the wet heat treatment was determined based on the above-mentioned “measurement of the shrinkage rate in the wet heat treatment of the yarn (spun yarn)”. As a result, the shrinkage rate in the wet heat treatment was 22.0˜ In the range of 44.4%, the value according to the method 4 of the present invention was in the range of 26.9 to 34.2%. Further, the elongation rate and elongation recovery rate of this product were evaluated according to the measurement / evaluation method of “B.
The evaluation results are shown in Table 2.

Comparative Example 3
As Comparative Example 3, the wet heat treatment was performed with water alone at 60 to 85 ° C. for 20 minutes and 130 ° C. for 20 minutes, and all were air-dried.
The evaluation results of the obtained spun yarn are also shown in Table 2.

Example 3 (Method 5 of the present invention)
(A) Preparation of raw cotton The same one as used in Example 1 was used.
(B) Spinning The same spinning as in Example 1 was used.
(C) Knitting Using 40 counts of 100% soy protein fiber spun yarn of Example 1, with a well density of 38 yarns / 吋, a course density of 36 yarns / 吋, a width of 202.0 cm and a length of 48.7 m Knitted. The knitting gauge was 22 gauge, the hook diameter was 30 mm, and it was knitted into a circular knitting. The mixture ratio of the knitted fabric was 100% by weight of soybean protein fiber.
(D) Wet Heat Treatment / Finish Processing According to Example 1, scouring, wet heat treatment, drying, dyeing, and finishing set were performed according to Example 1 except that this raw machine was treated with a 6% benzyl alcohol solution. The “shrinkage rate in the wet heat treatment” was determined based on the “measurement of the shrinkage rate in the wet heat treatment of the knitted fabric” in the above item (2). As a result, the shrinkage rate was 62.3% in the well direction (width direction) and the course direction ( Length direction) was 48.7% (Invention method 5). Further, the elongation rate and elongation recovery rate of this finished product were measured and evaluated.
The evaluation results are shown in Table 3.

Comparative Example 4
(A) Dyeing processing The raw machine of Example 3 was scoured, dyed and finished in the same manner as in Example 3 without wet heat treatment. In this case, the wet heat shrinkage was measured using a value obtained by measuring the shrinkage after dyeing / drying. The evaluation results of the obtained knitted fabric are shown in Table 3.

  As is clear from the fabrics in Table 1, the spun yarns in Table 2, and the knitted fabrics in Table 3, the shrinkage of each of the inventive methods 1, 2, 3, 4, and 5 of Examples 1, 2, 3 by wet heat treatment is The elongation was 20 to 70%, the elongation was 15 to 300%, the elongation recovery was 70% or more, and the stretchability when wet was extremely large and excellent.

  Moreover, the texture when wet was smooth, and there was no problem with the decrease in strength, and the fabric was splendid, spun yarn, and knitted fabric. In addition, the spinning property, weaving property, knitting property, wet heat treatment, and dyeing finish processing were smooth and efficient.

  On the other hand, in all of Comparative Examples 1, 2, 3, and 4, the shrinkage rate, elongation rate, and elongation recovery rate of the wet heat treatment were insufficient, and the stretchability was inferior.

Claims (9)

  A fiber structure mainly composed of soy protein fibers, wherein the structure has a wet elongation rate of 15% to 300% and / or an elongation recovery rate of 70% or more. .   The soy protein fiber structure according to claim 1, wherein the soy protein fiber is a short fiber.   The soy protein fiber structure according to claim 1 or 2, wherein the soy protein fiber is contained in an amount of 30% or more by weight.   The soybean protein fiber structure according to any one of claims 1 to 3, wherein the soybean protein fiber structure is any one of a yarn, a woven fabric, and a knitted fabric.   After forming fibers mainly composed of soy protein fibers into fiber structures such as yarns, woven fabrics and knitted fabrics, and after scouring at the processing stage, they are preliminarily wet-heat treated to 20% to 70% in the length direction of the fiber structures. A method for producing a soy protein fiber structure, characterized by shrinking and then finishing.   The method for producing a soybean protein fiber structure according to claim 5, wherein the wet heat treatment is a hot water treatment at 90 ° C to 125 ° C.   The method for producing a soybean protein fiber structure according to claim 5 or 6, wherein the wet heat treatment is a liquid mainly composed of water and is treated with hot water at a liquid temperature of 105 ° C to 125 ° C.   The method for producing a soybean protein fiber structure according to claim 5 or 6, wherein the wet heat treatment is performed at 90 ° C to 110 ° C with a liquid containing benzyl alcohol.   The soybean protein fiber structure according to any one of claims 5 to 8, wherein the soybean protein fiber structure is any one of a yarn, a woven fabric, and a knitted fabric, and is subjected to wet heat treatment and finished. Manufacturing method.