JPH0160099B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention uses a dispersion fluid in which an aqueous caustic soda solution is dispersed in an organic solvent that does not react with an aqueous solution of caustic soda such as perchlorethylene and has a boiling point of 50°C or more at room temperature and a low viscosity. The present invention relates to a method for mercerizing cotton yarn or cotton blend yarn. [Prior Art] Conventionally, mercerization of cotton yarn or cotton blend yarn with a caustic soda aqueous solution has been carried out by winding the cheese-like cotton yarn or cotton blend yarn once into a skein. To perform mercerization in the form of a skein, raise the skein,
Processes such as cheese rolling are required, which is time-consuming and extremely inefficient. Moreover, since skein-shaped mercerization is currently carried out industrially in the form of cheese or beams, it is not possible to directly integrate it with the dyeing process. This is a key point in achieving complete continuity of post-processing processes such as . [Problems to be Solved by the Invention] In the conventional skein-shaped mercerized processing of cotton yarn or cotton blend yarn, the amount of yarn per skein is significantly smaller than that of cheese-shaped skein, so the variation in the quality of the mercerized yarn is large per skein. Since it occurs in small lots, it has the disadvantage of becoming extremely large.In order to minimize the variation in quality of this mercerized yarn, the inventors of the present invention have dyed cheese, beam-shaped cotton yarn, or cotton blend yarn using only a caustic soda aqueous solution. Attempts have been made to mercerize using a machine, but in this case, the viscosity of the aqueous caustic soda solution normally used for mercerization is high at room temperature, and the pressure loss due to the cheese and beam becomes significantly large, requiring extremely high pressure for mercerization. , it was found that practical production is impossible under the current circumstances. Furthermore, there is the problem of managing the tension of the threads between the inner and outer layers of the cheese and beam. The present invention was developed as a result of intensive research conducted by the present inventors in view of the various problems described above in mercerizing cheese, beam-shaped cotton yarn, or cotton blend yarn, with the aim of solving the various problems described above. ,
Mercerization of beam-shaped cotton yarns or cotton blend yarns can be carried out under normal pressure and at room temperature, as conventionally used for dyeing, so industrialization is easy, and the mercerized products are uniform and of excellent quality. The present invention was completed after confirming that the post-treatment process and the dyeing process can be easily carried out continuously. [Means for Solving the Problems] The present invention provides a dispersion fluid in which perchlorethylene is dispersed with an aqueous solution of caustic soda at a concentration necessary for mercerizing cotton yarn or cotton blend yarn. This invention provides a method for mercerizing cheese and beam-shaped yarn. In addition to the perchlorethylene mentioned above, the dispersion medium for the caustic soda aqueous solution used in the present invention is preferably 10 centipoise or less at 10 to 40°C, and caustic soda at a boiling point of 50°C or higher and 150°C or lower. The solvent must be able to disperse the caustic soda aqueous solution without dissolving in the aqueous solution. In addition to perchlorethylene, there are other hydrocarbon solvents that satisfy the above solvent conditions.
-Hexane, isohexane, n-butane, n-octane, isooctane, petroleum ether, petroleum benzene, ligroin, gasoline, petroleum spirits,
There are petroleum naphtha, cyclohexane, methylcyclohexane, benzene, toluene, xylene, ethylbenzene, coal tar naphtha, and solvent naphtha.Halogenated hydrocarbons include chloroform,
carbon tetrachloride, ethylene chloride, ethylidene chloride,
1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,1,1,2-tetrachloroethane, 1,1,2,2-tetrachloroethane,
1,2-dichloroethylene, trichlorethylene, 1,2-dichloropropane, butyl chloride, amyl chloride, mixed amyl chloride, dichloropentane,
Hexyl chloride, ethylene bromide, chlorbromomethane, ethylene chlorbromide, chlorpenzene,
There are other fluorine compounds, and alcohols include n-butanol, isobutanol, sec-butanol, n-amyl alcohol, isoamyl alcohol, sec-amyl alcohol, 3-pentanol, tertiary amyl alcohol,
There are fusel oil, methyl amyl alcohol, 2-ethyl butanol, and ethers include isopropyl ether, n
-Butyl ether, epichlorylhydrin, 2-
There are methylfuran and diethyl acetal, and the ketones include methyl ethyl ketone, methyl-n-propyl ketone, methyl-n-butyl ketone, methyl isobutyl ketone, methyl-n-amyl ketone, diethyl ketone, ethyl-n-butyl ketone, and di-n- propyl ketone, acetone oil,
There is mesityl oxide, and the esters include ethyl formate, propyl formate, n-butyl formate, isobutyl formate, aluminum formate, methyl acetate, ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate, and acetic acid. Isobutyl, sec-butyl acetate, n-amyl acetate, isoamyl acetate, methylisoamyl acetate, sec-hexyl acetate, methyl propionate, ethyl propionate, n-butyl propionate, methyl butyrate, ethyl butyrate, ethyl oxyisobutyrate There are polyhydric alcohol derivatives such as ethylene glycol diethyl ether and other silicone oils. Furthermore, the weight ratio of the organic solvent and the caustic soda aqueous solution used for mercerization is as long as the concentration of the caustic soda aqueous solution used for mercerizing the cotton yarn or cotton blend yarn is constant, for example, 20% by weight, and the mercerization is carried out at room temperature. In the case of dispersing the caustic soda aqueous solution in the organic solvent used, it is determined mainly by the viscosity of the dispersion fluid used, and (organic solvent):(caustic soda aqueous solution) = 1:1 to 100:1 (weight ratio). , preferably from 20:1 to 50:1. If the solvent (weight ratio) is less than 1 to the caustic soda aqueous solution (weight ratio), the viscosity of the dispersion fluid will be high and high pressure will be required, which is industrially disadvantageous, and if the solvent exceeds 100, mercerization treatment will be required. It takes a long time to process, and it is economically disadvantageous because the amount of fluid is too large relative to the weight of the cheese and beam. A temperature of 10 centipoise or less in °C is suitable. [Example] Example 1 Cheese wrapping density 0.341cm ³ , each piece weighing 500g 40
Perchlorethylene using high count single thread cheese
1 manufactured by Tokyo Rinsen Co., Ltd. with a ratio of perchloroethylene and sodium hydroxide of 33:1 (weight ratio) of the dispersion fluid in which 20% by weight aqueous caustic soda solution was dispersed.
Mercerization time using solvent dyeing machine for Kg test
It was run for 10 minutes at a fluid flow rate of 30/min per piece of cheese. The pressure drop in this case was 12 meters of water column. Mercerized cheese was obtained by washing with hot water, washing with water, neutralizing with water, and drying in the conventional manner. The quality of the obtained mercerized yarn is shown in Table 1. Even when beam is used instead of cheese, mercerization can be performed in the same manner as above using a beam dyeing machine.

〔Effect of the invention〕

The effects of the present invention are summarized as follows. (a) By using a caustic soda dispersion fluid of an organic solvent of cheese, beam-shaped cotton yarn or cotton blend yarn, mercerization can be carried out smoothly at room temperature and pressure. (b) Mercerized cotton yarn or cotton blend yarn of uniform quality and excellent quality was obtained by mercerization using a dispersion fluid of an organic solvent using caustic soda. (c) A path has been opened for continuous integrated production of cheese, beam-shaped mercerization, and dyeing, which was previously impossible with skein-shaped mercerization of cotton yarn or cotton blend yarn.

Claims (1)

[Scope of Claims] 1 Mercerization of cheese, beam-shaped cotton yarn or cotton blend yarn using a dispersion fluid prepared by dispersing perchloroethylene with an aqueous solution of caustic soda at a concentration necessary for mercerizing cotton yarn or cotton blend yarn. A method for mercerizing cheese and beam-shaped yarn, characterized by: 2. The method for mercerizing cheese and beam-shaped yarn according to claim 1, which uses a dispersion fluid having a weight ratio of 2 (perchlorethylene): (caustic soda aqueous solution) = 1:1 to 100:1 (weight ratio).