JPH0219229B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a processing method for improving the quality of silk fabrics, and in particular, a method for improving the practical performance of silk fabrics by reacting polyhydric alcohol-based epoxy compounds with silk fabrics under mild conditions. is aimed at something. When silk fabric is used as a material for Western clothing, it can be expected to produce a higher quality finished product due to its elegant luster and supple texture, which have characteristics that cannot be obtained with other types of fibers. On the other hand, silk fabrics are somewhat lacking in practical performance, and in particular, they have serious drawbacks such as being easily wrinkled, easily losing their shape, easily becoming discolored and brittle due to sunlight, and easily becoming fluffy due to friction. I can't deny something. Various chemical treatment methods have been researched to remove these defects, but there have been few successful cases, and even if some of these defects can be removed, the treatments have not been successful. In many cases, the inherent advantages of silk fabrics have been lost, or it has been difficult to put them into practical use commercially. As for practical methods, methods using epoxy compounds are thought to be effective for this purpose, but even in such cases, methods using, for example, alkali catalysts (see Japanese Patent Publication No. 38-25198)
However, since the process was carried out at high temperatures using caustic soda or soda carbonate as a catalyst, the silk fabric became brittle and discolored, making it unsuitable for practical use. In addition, a method using a neutral salt catalyst (Special public interest
38131), there are fewer problems with embrittlement and discoloration of silk fabrics, but since the process is carried out in an organic solvent, it is difficult to process large quantities, especially in the form of fabrics. It must be said that it is inappropriate and has not been put into practical use yet. The present invention took this situation into consideration, reconsidered the method of applying epoxy compounds, and obtained a method for processing large quantities of textiles. That is, in the present invention, silk fabrics are filled with an aqueous solution of an epoxy compound and an alkali metal salt of monocarboxylic acid, and then subjected to a moist heat treatment. It has been found that practical performance can be improved without losing consistency. In the present invention, sodium, potassium or lithium salts of acetic acid, propionic acid, butyric acid, etc. are suitable as the alkali metal salt of monocarboxylic acid serving as a catalyst. It is most preferred to use 20%, preferably 5-10%. These catalysts easily dissolve in water and exhibit weak alkalinity, and even if they coexist with epoxy compounds in an aqueous solution, they do not easily react with them at room temperature.
The reaction of epoxy compounds is promoted only when moisture is present at high temperatures of 80 degrees Celsius or higher. Therefore, there is an advantage that the epoxy compound is less consumed in the processing solution and the processing effect can be controlled by the conditions of the wet heat treatment. In addition, as the epoxy compound used in the present invention, polyhydric alcohol-based epoxy compounds are useful, and among them, glycidyl ether of ethylene glycol, which has a high solubility in water, is the most useful. Best results are obtained when using around 15-28%. After filling the silk with the treatment solution and removing the liquid at a squeezing rate of 50 to 100%, preferably 70 to 90%, it is pre-dried at a low temperature of 60 to 70 degrees Celsius, and then dried in saturated steam for 10 to 30 minutes. Through heat treatment, improved performance of silk is achieved. The appropriate heat treatment temperature is 100 degrees Celsius or up to 110 degrees Celsius; using a higher temperature may shorten the treatment time, but this is not desirable because it will cause discoloration of the silk. Particularly remarkable improvements in practical performance due to improved performance are evident in wrinkle recovery properties, light fastness, alkali resistance, and dyeing properties.
It is clear that materials for creating more valuable Western clothing products can be obtained. Next, some processing examples according to the present invention will be explained using specific examples. Example 1 A 14-momme Habutae was refined, immersed in a treatment solution consisting of 150 parts of Epiol E100, 15 parts of sodium propionate, and 1000 parts of water.
% and lightly pre-dry at 60 degrees C. Next, this habutae was heat treated at 100 degrees C for 15 minutes,
After treating with 3% soap solution at 80 degrees Celsius, wash with water, dry, and lightly iron. The performance of the processed product thus obtained was as follows. The table below shows the numerical values in comparison with unprocessed products.

[Table] Example 2 A 14-momme Habutae was refined, immersed in a treatment solution consisting of 150 parts of Epiol G-100 (glycerin-based), 15 parts of sodium propionate, and 1000 parts of water, and then reduced to about 85 parts by mangle.
Squeeze the liquid to 50% and pre-dry it slightly at 60 degrees C. Next, this habutae was heat treated at 100 degrees C for 15 minutes,
After treating with 3% soap solution at 80 degrees Celsius, wash with water, dry, and lightly iron. The performance of the processed product thus obtained was as follows. The table below shows the numerical values in comparison with unprocessed products.

[Table] Example 3 Scouring 14 momme Habutae and adding it to Epolite 70P (propylene glycol type)
Immerse in a treatment solution consisting of 150 parts potassium propionate, 15 parts water, and 1000 parts, and mangle about 85
% and lightly pre-dry at 60 degrees C. Next, this habutae was heat treated at 100 degrees C for 15 minutes,
After treating with 3% soap solution at 80 degrees Celsius, wash with water, dry, and lightly iron. The performance of the processed product thus obtained was as follows. The table below shows the numerical values in comparison with unprocessed products.

[Table] Example 4 Scouring 14 momme Habutae and adding it to Epiol E-100 (ethylene glycol type)
Immerse in a treatment solution consisting of 150 parts potassium propionate, 15 parts water, and 1000 parts, and mangle about 85
% and lightly pre-dry at 60 degrees C. Next, this habutae was heat treated at 100 degrees C for 15 minutes,
After treating with 3% soap solution at 80 degrees Celsius, wash with water, dry, and lightly iron. The performance of the processed product thus obtained was as follows. The table below shows the numerical values in comparison with unprocessed products.

[Table] Example 5 A 14-momme Habutae was refined, immersed in a treatment solution consisting of 150 parts of Epiol G-100 (glycerin-based), 15 parts of potassium propionate, and 1000 parts of water.
% and lightly pre-dry at 60 degrees C. Next, this habutae was heat treated at 100 degrees C for 15 minutes,
After treating with 3% soap solution at 80 degrees Celsius, wash with water, dry, and lightly iron. The performance of the processed product thus obtained was as follows. The table below shows the numerical values in comparison with unprocessed products.

[Table] As is clear from the above, the product obtained by the method of the present invention has excellent wrinkle recovery properties, light resistance, and alkali resistance, and has no loss in tear strength and flexibility. Similar good results were also obtained when using glycerin-based epoxy compounds and propylene-based epoxy compounds other than ethylene glycol-based epoxy compounds.

Claims (1)

[Claims] 1. A method for processing silk fabric, which comprises immersing silk fabric in an aqueous solution of a polyhydric alcohol-based epoxy compound and an alkali metal salt of a monocarboxylic acid, removing the liquid, and then subjecting it to moist heat treatment.