JPH0782677A - Acetate textile fabric and its production - Google Patents

Abstract

PURPOSE:To provide acetate textile fabric having fine crimps at printed pattern portions thereof. CONSTITUTION:The objective acetate textile fabric characterized by having fine crimps at printed pattern portions thereof. This textile fabric can be obtained by the following processes: acetate fiber-contg. fabric is treated with an alkaline compound to saponify the surface of the acetate fibers followed by patternedly printing a liquid paste containing a discharge erosive agent on the fabric and then making a heat treatment to decompose and eliminate the saponified parts of the printed portions; subsequently, the resultant textile fabric is heated under moist heat at >=96 deg.C to manifest crimps at the printed pattern portions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acetate fiber cloth having a fine crimp in the acetate fiber of a printed pattern and a method for producing the same.

[0002]

2. Description of the Related Art In recent years, in the field of textiles for clothing, various modifications and improvements have been made on various natural fibers and chemical fibers due to the diversification of consumer needs and the trend toward higher grades. With respect to the acetate fiber, the glossiness, texture and quality have been improved by changing the fiber cross-section, surface and yarn form.

Further, conventionally, by utilizing the property that cellulose fibers are easily carbonized and decomposed by sulfuric acid or the like, a cloth containing a combination of these fibers and synthetic fibers such as polyester fibers which are hard to be decomposed by strong acid is coated with a paste containing a strong acid. Known as opal processing is a method in which only the cellulose fibers in that portion are decomposed to obtain a transparent pattern cloth.

The mainstream of the method for forming crimps in acetate fibers is to perform twisting, heat setting and untwisting continuously with a high-speed false twisting spindle and a heater. However, in the method using false twist, it is difficult to form fine crimps due to the limiting factors such as fiber strength. As a method of developing crimps other than the false twist method, Japanese Patent Publication No. 47-37205 discloses that long filaments of acetate filaments are pre-stretched and then immersed in a swelling aqueous solution with an inclination angle to produce random crimps. A method is disclosed. However, although this method is also suitable as a method for obtaining a large crimp, a fine crimp could not be formed. In any case, since the above-mentioned two methods apply crimps at the stage of the yarn, a step of forming a fabric such as a woven or knitted material is required next, which is not only inefficient. However, it was difficult to form a cloth having a crimp only in its printed pattern.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems and to provide an acetate fiber cloth having a high design property in which crimping is applied only to a printed pattern portion. That is, by using the formed fabric without crimping the yarn, and by post-processing to develop the crimped portion only in the printed pattern portion, an acetate-based product having high productivity and very high designability is obtained. It is to provide a fiber cloth and a manufacturing method thereof.

[0006]

The first gist of the present invention is as follows.
It is an acetate fiber-based cloth characterized in that the acetate fibers in the printed pattern portion have fine crimps.

The acetate fiber cloth referred to in the present invention means
A cloth made of acetate fibers alone may be used, or a cloth made of a composite yarn made of acetate fibers and other fibers may be used. Further, a mixed woven fabric composed of acetate fibers and other fibers in which acetate fibers are used for warp or weft and other fibers are used for weft or warp may be used.

The acetate fiber referred to in the present invention means a diacetate fiber having an oxidation degree of 45 to 59.5%. In particular, since acetate fibers have lower strength and elongation than synthetic fibers, it is desirable to use not only acetate fibers but also other fibers when forming a fabric. As the other fibers, fibers that can be mixed and are not corroded are desirable, and synthetic fibers such as polyester fibers and acrylic fibers are preferable.

The term "fine crimps" as used in the present invention means random crimps of 5000 pieces / m or more along the fiber axis direction. By such fine crimping, it is possible to obtain a fabric having an improved design, which has never existed before. In particular, the present invention is a unique fabric having fine crimps only in the printed pattern portion, and it is possible to impart a function such as texture improvement and hygroscopicity by the printed pattern by the printed pattern. ,
A fabric that can be widely used for various purposes.

The crimp in the present invention is defined as one unit between adjacent crests of the corrugation of the crimp formed along the fiber axis direction. The number of crimps formed can be determined from a scanning electron micrograph.

A second gist of the present invention is to treat a cloth containing acetate fibers with an alkali compound to saponify the surface of the acetate fibers, and then print a paste solution containing a discharging agent in a pattern. By performing a heat treatment to decompose and remove the saponified portion of the printed portion, and then heating under moist heat of 96 ° C. or higher,
This is a method for producing an acetate fiber-based cloth in which crimps are developed in a printed pattern portion.

In the present invention, first, the surface of the acetate fiber must be saponified (cellulosic). afterwards,
It is necessary to remove the cellulosic portion with an etchant.

Acids, which are the corrosive agents used in the present invention, generally corrode acetate fibers as well, but since cellulose fibers are essentially extremely sensitive to the action of acid, the concentration and temperature conditions can be controlled. Only cellulose on the fiber surface can be decomposed and removed.

In the present invention, 96 parts are obtained by decomposing and removing most of the cellulose layer on the surface of the acetate fiber with an etchant.
The crimps can be developed by heating under moist heat of ℃ or more. Here, as a heating method for expressing the crimp, a method such as steam heating treatment or immersion in hot water can be used. That is, in order to develop crimps, it is essential to heat in an atmosphere containing water, and dry heating does not develop crimps. Further, the heating temperature is also important in the present invention, and heating below 96 ° C. does not cause crimping at all.

Particularly, in order to develop a fine crimp, 10
The method of immersing in hot water of 0 ° C. or higher is preferable, and the treatment time is preferably heating for 2 minutes or longer.

Examples of the alkali compound in the present invention include alkali metal hydroxides such as caustic potash and caustic soda, alkaline earth metal hydroxides such as calcium hydroxide and magnesium hydroxide, and strong alkalis such as sodium hydrogen carbonate and soda ash. Examples thereof include weak acid conjugate salts.

The etchant used in the present invention is preferably an acid which carbonizes and hydrolyzes cellulose, and inorganic acids such as sulfuric acid and hydrochloric acid, sodium hydrogensulfate, aluminum sulfate,
Sulfates such as ferric sulfate, ammonium sulfate, zinc sulfate, and stannous sulfate, ferrous chloride, ferric chloride, aluminum chloride, magnesium chloride, zinc chloride, cobalt chloride, cuprous chloride, nickel chloride, chloride Chlorides such as stannous tin and stannic chloride, chlorates such as sodium chlorate, aluminum chlorate, potassium chlorate, sodium chlorite, nitrates such as chromium nitrate, copper nitrate, zinc nitrate, oxalic acid No. 1 Iron, ferric oxalate, stannous oxalate and other oxalates, zinc acetate and other acetates,
Examples thereof include phosphates such as zinc phosphate and organic acids such as alkylnaphthalene sulfonic acid.

As the sizing agent used in the present invention, a sizing agent which is particularly resistant to an acid should be selected, a locust bean system is preferable, and an etherified locust is particularly suitable. Among synthetic sizing agents, hydroxyethyl cellulose is preferable.

As a method for printing a cloth, a printing method, a spray method or the like can be used, and as a printing method, a form printing method, a full screen method, a rotary screen method, a roller method or the like can be used.

The heat treatment after printing the glue liquid is 1 for saturated steam.
It is carried out at 0 to 140 ° C., 100 to 200 ° C. for dry heat, and 130 to 200 ° C. for superheated steam for 1 to 60 minutes.

By the method of the present invention as described above, very micro crimps are developed, and 5000 or more random crimps can be developed along the fiber axis direction. In particular, according to the present invention, it is possible to obtain a unique cloth having a fine crimp in the printed pattern portion.

[0022]

EXAMPLES The present invention will be specifically described below with reference to examples. (Example 1) Five sheets of satin fabric made of diacetate fiber having an acetylation degree of 56.9% (warp: bright 75d / 21f, weft: dull 100d / 27f, warp density: 200 / inch, weft density: 87) / Inch) was scoured by a 6-tank continuous scouring machine and then dried. Next, this scouring cloth is used with a bath ratio of 1:20, 10
% Owf of caustic soda was added, the temperature was raised from 30 ° C. at a rate of 2 ° C./min, and saponification treatment was performed at 80 ° C. for 60 minutes.
A treated cloth was obtained in which the fiber surface was made cellulose and the weight loss rate due to alkali was 10.6%. Then, a paste solution (sodium hydrogensulfate monohydrate 7%, Mayprogum NP (manufactured by Meyhall) 55%, water 38%) was applied to the treated cloth.
Is printed using a flat screen, then 130 ° C
After steaming for 10 minutes, rinse with water and leave it free for 1
It was immersed in hot water of 00 ° C. for 10 minutes and then dried. By this treatment, a cloth having fine crimps corresponding to 7400 pieces / m in the printed portion was obtained.

(Example 2) 200 t / of diacetate fiber (Bright 45d / 34f) having an acetylation degree of 56.9% and polyester continuous fiber drawn yarn (Semidal 30d / 12f)
Plain weave (warp density 1
(00 lines / inch, weft density 75 lines / inch) were scoured and dried. This scouring cloth was poured into an aqueous solution containing 10% by weight of caustic soda with respect to diacetate fiber at a bath ratio of 1:20, heated from 30 ° C. at a rate of 2 ° C./minute, and heated at 80 ° C. to 60
After saponification for a minute, a treated cloth was obtained in which the weight loss rate of the diacetate fiber portion due to alkali was 10.5%. Then, a paste solution (aluminum sulfate 12%, Mayprogum NP (manufactured by Meyhall) 50%, water 38%) was printed on the treated cloth using a flat screen, and then at 1300C for 1 hour.
After steaming for 0 minutes, washing the product with water for 100 minutes
It was immersed in hot water at 0 ° C. for 10 minutes and then dried. By this treatment, a fabric having a fine crimp corresponding to 6100 fibers / m in the acetate fiber of the printed portion was obtained.

(Example 3) A diacetate fiber (bright 75d / 21f) having a degree of acetylation of 56.9% was used as a warp, and a false twist textured yarn of polyester fiber (semi-dull 75d / 36f) was used as a weft. Woven fabric (warp density 200 / inch,
It was woven to a weft density of 83 fibers / inch, scoured and dried. This scouring cloth was poured into an aqueous solution containing 10% by weight of caustic soda with respect to diacetate fiber at a bath ratio of 1:20,
The temperature was raised from 0 ° C. at a rate of 2 ° C./min, and saponification treatment was performed at 80 ° C. for 60 minutes to obtain a treated cloth in which the diacetate fiber portion had an alkali weight loss rate of 10.4%. Then, a paste solution {ferric sulfate 3%, Maypro gum NP (Mey
55%, 42% water) were printed using a flat screen, and then steam treatment was performed at 130 ° C. for 10 minutes, followed by washing with water, immersing in hot water for 10 minutes, and then drying. By this treatment, a cloth having a fine crimp corresponding to 7,000 fibers / m in the acetate fiber of the printed portion was obtained.

(Comparative Example 1) Using the same scouring cloth as that used in Example 1, alkali treatment and corrosion treatment were performed under the same conditions as in Example 1. The treated cloth obtained is dried at 120 ° C. for 3 times.
It was heated for 0 minutes, but there was almost no crimp in this fabric.

(Comparative Example 2) Using the same scouring cloth used in Example 1, alkali treatment and corrosion treatment were performed under the same conditions as in Example 1. The treated cloth obtained is heated in hot water at 95 ° C for 30
After heating for a minute, there was almost no crimp in this fabric.

[0027]

The acetate fiber-based fabric of the present invention is a unique fabric having fine crimps only in the imprint pattern, and the crimps have functions such as improving texture and hygroscopicity. It is a fabric that can be applied by various methods and can be widely applied to various uses. Moreover, the fine crimps possessed by the fabric of the present invention are random crimps of 5000 pieces / m or more along the fiber axis direction, and are extremely fine crimps that have never existed before. Further, the method for producing an acetate fiber-based fabric of the present invention does not require a special device for expressing crimps, and can produce an acetate fiber-based fabric having crimps in a printed pattern with high productivity. Is possible. Moreover, the level of crimp is so fine that it cannot be obtained by conventional techniques.

Claims (5)

[Claims] 1. An acetate fiber-based fabric, wherein the acetate fibers in the printed pattern portion have fine crimps. 2. The acetate fiber-based fabric according to claim 1, wherein the fabric is composed of a composite yarn composed of acetate fibers and other fibers. 3. The acetate fiber-based cloth according to claim 1, wherein the cloth is a mixed woven fabric composed of acetate fibers and other fibers. 4. A cloth containing an acetate fiber is treated with an alkali compound to saponify the surface of the acetate fiber, a paste solution containing a discharging agent is printed in a pattern, and then heat treatment is performed to print the printed portion. The method for producing an acetate fiber-based fabric according to claim 1, wherein the saponified portion of (1) is decomposed and removed, and then the mixture is heated under moist heat of 96 ° C. or more to develop crimp in the printed pattern portion. 5. The method for producing an acetate fiber-based fabric according to claim 4, wherein the crimp development is performed in hot water at 100 ° C. or higher.