JPS5870786A - Processing of cellulose fiber - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for processing fiber structures of cellulose fibers and polyester fibers.

Conventionally, one of the fiber structures made of two different types of fibers is partially coated with an acid or alkali and then heat-treated.
As a result, carbonization, melting, and embrittlement are removed, transparent,
A so-called skipping process for obtaining a pattern is known. For example, a method of carbonizing vegetable fibers of mixed woven fabrics such as silk and human silk, acetate and human silk, nylon and human silk using acid to create fabrics with openwork patterns; After printing with tragacanth rubber paste containing sulfuric acid or alumina sulfate, etc., drying at room temperature, heat treatment at high temperature to easily accelerate the carbonization reaction, and then kneading and washing the fabric to print. There is a method in which a transparent pattern is obtained by removing the vegetable fibers in the area, and a method in which a glue agent containing an alkali salt of phenols is printed on a knitted fabric containing polyester fibers, and then high heat treatment is performed to make only the polyester fibers in the printed areas brittle. It is known that the fibers to be mixed with the other fibers are removed mechanically, or if the other fibers have high alkali resistance, they are dissolved and removed using a hot alkaline solution. , rayon, cotton, nylon, polyvinyl chloride, acrylic, polypropylene, and polyvinyl alcohol fibers.

All of the conventional openwork pattern formation methods described above are limited to only the formation method, and are limited to the dyeability and temperature of the fiber structure.
is not taken into account. In other words, when dyeing a fiber structure made of two types of fibers with different properties, it is usually necessary to use dyes suitable for each of the two types of fibers, which requires considerable difficulty in developing the color, and even more difficult for printing. Even more so.

The present invention is a fiber processing method for forming an openwork pattern and imparting dyeability to a fiber structure made of these two types of fibers having different properties, and particularly for forming an openwork pattern on a fiber structure made of cellulose fibers and polyester fibers. This is a fiber processing method that imparts dyeability in the same way as . That is, after a fiber structure consisting of cellulose fibers and polyester fibers is partially chemically modified with an acid chloride to make it dyeable with disperse dyes, cellulose is treated with an aqueous sulfuric acid solution, alumina sulfate, sodium hydrogen sulfate, or alkylated naphthalene sulfonic acid. This is a fiber processing method characterized by applying a fiber removing agent, removing unmodified cellulose fibers to form a transparent pattern, and then dyeing with a disperse dye. That is, when the cellulose fibers of the present invention are partially chemically modified to be dyeable with disperse dyes,
Chemically modified parts are acid resistant
It is extremely stable to heat treatment with 0 to 75% sulfuric acid, and therefore the removal of cellulose fibers in the unmodified portion becomes even more clear, forming an extremely contrasting transparent pattern.

Specifically, an alkaline agent is applied in advance to a fibrous structure consisting of cellulose fibers and polyester fibers, and then an acid chloride is applied partially, followed by dry heat or steam treatment to remove the cellulose in the fibrous structure. The fibers are partially chemically modified to be dyeable with disperse dyes, and then a cellulose fiber removing agent is uniformly applied to the fibers, and unreacted cellulose fibers are removed through heat treatment to form a transparent pattern. , is a fiber processing method that obtains a uniformly dyed material with an openwork pattern by dyeing with a disperse dye. That is, the present invention is a fiber processing method characterized by forming a transparent pattern on a fiber structure made of cellulose fibers and polyester fibers and at the same time uniformly dyeing the fiber structure with a single disperse dye.

The alkaline agents used in the present invention include, for example, lithium, sodium potassium, beryllium, magnesium,
They are hydroxides of alkali metals or alkaline earth metals such as calcium, barium, and strontium.

The acid chloride used in the present invention is, for example, an aromatic carboxylic acid chloride such as benzoyl chloride having the following structure (1), or an aromatic sulfonic acid such as P-toluenesulfonyl chloride having the following structure (tnl). It is a chloride.

(R, IR2 is hydrogen, chlorine, nitro group, or has 1 to 1 carbon atoms
2 alkyl group, R, l R4 is hydrogen or has 1 to 2 carbon atoms
means an alkyl group. ) In addition, in the present invention, as a method for partially applying the acid chloride to a fiber structure composed of cellulose fibers and polyester fibers, the acid chloride is dissolved in an appropriate solvent. Rotary screen coating, Furanoto Scree-7 coating, etc. can be made by spray coating, or by making an in-water milk solution with water and a surfactant and adjusting the viscosity with a thickener. Alginate sorter is generally used as a one-print printing paste.

, CMC, and bentonite, which have excellent thixotropic properties.

The cellulose fibers and polyester fibers obtained by the above method are immersed in a 40% to 75% sulfuric acid solution, or a sulfuric acid, alumina sulfate solution. By printing with a printing paste containing , or sodium hydrogen sulfate, and then heat-treating, only the unmodified cellulose fibers are extracted, resulting in the formation of a clear transparent pattern, and the other fibers are removed. All of them have extremely excellent dyeing properties against disperse dyes, so they can be dyed with extremely uniform density in subsequent dyeing.

A more detailed explanation will be given below with reference to Examples.

[Example-1] (1) Mercerized polyester/cotton fabric
A 5/35 blended broad cloth was immersed in a 10% aqueous sodium hydroxide solution and then squeezed with a squeezing roll to a squeezing force ratio of 90%.

Next, on this alkali-applied cloth, an emulsion in water of the following (a) formulation was applied, the number of lines was 40 lines/inch, and the thickness of the nickel plate was 150μ.
, with a rotary screen plate consisting of the pattern shown in Fig. 1 with an opening rate of 50%, the non-image area fal was printed, and then with a pin tenter open at 100 ° C.
The pattern-modified fabric was obtained by heating for seconds, then sawing pink and washing with water.

(B) Prescription (2) Next, the pattern-modified fabric obtained in (1) was immersed in a 60% sulfuric acid aqueous solution for 30 seconds, dried at room temperature, and then
After heating at 00° C. for 60 seconds, washing with water and drying while mechanically kneading, a clear transparent pattern was formed in the unmodified area, that is, the image area tb+ shown in FIG.

+3) (The cloth obtained in step 21 was dyed in an autoclave at a bath ratio of 1/30 at 20° C. using a dye bath with the following recipe.
After dyeing for a minute, a uniform and dense dyed fabric was obtained.

[Example-2] (1) A mixed woven fabric made of polyester/rage: /-30750 (mixed fiber yarn) was immersed in a 10% aqueous sodium hydroxide solution and then squeezed with a squeezing roll to achieve a mixing rate of 90%. Squeezed.

Next, on this alkali-imparting cloth, an emulsion in water with the following (b) formulation was applied, the number of lines was 40 lines/inch, the thickness of the nickel plate was 150μ,
A rotary screen plate consisting of the pattern shown in Fig. 1 with a porosity of 50% is used to print on the non-printed fat portion, air-dried, and then steamed at 100°C for 60 seconds in a steamer, followed by a soaping and washing process. A pattern-modified cloth was obtained through this process.

(b) Prescription (2) A printing paste consisting of the following recipe was applied to the entire surface of the pattern-modified fabric obtained in Eft) using a silk screen, and after drying, it was heat-treated at 130° C. for 4 minutes.

Kuin printing glue> Anhydrous aluminum sulfate 180 fflt
IT Department British Gum 500//
Glycerin 8o〃Original glue (Pritinsh gum/water = 1o o, 5171-e) 240
〃 After that, I washed it with water while rubbing it mechanically and dried it.
A clear transparent pattern was formed in the unmodified area, that is, the image area fb) shown in FIG.

+3) The cloth obtained in (2) was overlaid with a transfer paper obtained by gravure printing with ink of the following composition, and heated and pressurized at a temperature of 195 ° C. and a pressure of 300 g/ff for 1 hour and 40 seconds. When transfer printing was performed, a dyed cloth with extremely uniform density was obtained.

<Ink> [Example-3] (11 Mercerized polyester/cotton = 65
755 was immersed in a 10% aqueous sodium hydroxide solution, and then squeezed with a squeezing roll to a squeezing rate of 90%.

Next, a 50% toluene solution of benzoyl chloride was partially sprayed onto this alkali-applied cloth using a spray gun, and the cloth was air-dried at room temperature. After that, the cloth was dyed so pink, washed with water, and dried to obtain a modified cloth.

The partially modified fabric obtained in (2HI) was immersed in 60% sulfuric acid aqueous solution K3 [1 second, dried at room temperature, and then 100%
℃ for 60 seconds, and then mechanically washed with water and dried.
A clear transparent pattern was formed in the unmodified area.

(3) (The fabric obtained in 2+ was dyed in an autoclave at 150°C for 20 minutes at a bath ratio of 1/30 using the dye bath with the following recipe, and a dyed fabric with a uniform density was obtained. .

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view showing a transparent pattern of fibers. (at...non-printing area (bl...printing area Fig. 1)

Claims (4)

[Claims] (1) After partially chemically modifying the cellulose fiber part in the fiber structure consisting of cellulose fiber and polyester fiber to make it dyeable with disperse dyes with acid chloride, a cellulose fiber eliminating agent is further applied, and then A cellulose fiber processing method characterized by heating and removing unmodified cellulose fibers. (2) As the acid chloride, an aromatic carboxylic acid chloride having the structure of the following (Tl) or an aromatic sulfonic acid chloride having the structure of the following [111] is used. ) The method described in (R,, R2 is hydrogen, chlorine, nitro group, or has 1 to 1 carbon atoms)
2 alkyl group, RS, R4 is hydrogen, or has 1 to 2 carbon atoms
(means an alkyl group) (3) The cellulose fiber food remover is sulfuric acid, alumina sulfate,
The method according to claim 1) or 2), characterized in that the oxidation agent is any one of sodium hydrogen sulfate and alkylated naphthalene sulfonic acid. (4) A method for processing cellulose fibers, which comprises dyeing the blanks obtained by the method according to claim 1), (2), or (3) with a disperse dye.