JPS6312762A - Method for fixing protein to protein-containing 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 fixing proteins on protein-containing fibers, and more specifically, to fixing proteins on fibers without causing coloration, such as sericin fixation on silk fibers. Regarding the method.

Prior Art and Problems Silk fibers generally contain serinone protein, which accounts for about 25% of the weight of cocoon fibers, and fibroin, which has serinone protein dissolved and removed, is usually used for clothing.
Natsugata, which takes advantage of its crunchy taste without removing serinone, is also known for its use in clothing.

In the latter case, unlike sericin or fibroin, it becomes soluble in water under the influence of alkali, acid, or heat, so in order to use it for clothing, it must be chemically treated to make it insolubilized, so-called serinone fixation. It is required to do so. Conventionally, various drugs have been known to insolubilize sericin. In particular, glutaraldehyde easily makes various proteins suspicious, and sericin and other substances are easily fixed and stabilized, making it an excellent serinone fixing agent. For example, it is known that
No. 1-24601 discloses a sericin fixing method in which *Konji is treated with a glutaraldehyde solution.

However, glutaraldehyde has the major disadvantage of causing browning and discoloration of white items often used in summer clothing, etc.14, and its use in fixing serinone has been extremely limited. .

In view of these circumstances, the present inventors took advantage of the excellent serinone fixing effect of glutaraldehyde,
In addition, we conducted extensive research to find a way to fix the stain without causing any staining. As a result, they found that treatment with glutaraldehyde in the presence of an alkali metal bisulfite adduct of glutaraldehyde or an alkali metal bisulfite salt can color fibers and effectively fix sericin. . Furthermore, this serinone fixing method can be used to utilize the layer phase, which has traditionally been thrown away without being used, as well as to impregnate and coat proteins to improve the texture and dyeability of fibers. We found that it can also be applied. The present invention has been completed based on such novel findings.

Means for Solving the Problems The present invention involves treating protein-containing fibers with a treatment solution containing an alkali metal adduct of glutaraldehyde/bisulfite or a treatment solution containing an alkali metal salt of glutaraldehyde and bisulfite. The present invention provides a method for fixing proteins on protein-containing fibers, which is characterized in that the proteins are insolubilized on the fibers.

The first specific embodiment of the fixing method of the present invention is the fixing of sericin without coloring to raw silk. A second embodiment of the present invention is the use of a laminar phase that is impregnated or applied onto fibers with a solution of the laminar phase and fixed by the method of the present invention. A third specific aspect of the present invention is the conventional silk, wool,
Sericin, fibroin, etc. to improve the texture and dyeability of cotton, rayon, polyester, acrylic fibers, etc.
By impregnating or coating with animal proteins such as collagen and casein, or vegetable proteins such as soybean protein and gluten, these proteins are fixed on the fibers.
The purpose is to improve the poor durability in conventional such processing.

Thus, examples of protein-containing fibers that are subject to the fixing method of the present invention include serinone-containing fibers such as raw silk, fibers impregnated or coated with a laminar solution, protein-impregnated or Examples include Y2M fibers produced by coating, and include not only fibers themselves but also forms such as woven fabrics.

The treatment liquid used may be an aqueous solution containing a glutaraldehyde/bisulfite alkali metal adduct, or an aqueous solution containing glutaraldehyde and an alkali metal bisulfite salt. Examples of alkali metal adducts of glutaraldehyde and hydrogen sulfite include glutaraldehyde and sodium disulfite adducts, and glutaraldehyde and potassium hydrogen sulfite adducts. It is used at a concentration of 0.5-2.5% (by weight (11%) or less), preferably 0.5-10%.

Further, examples of alkali metal hydrogen sulfite salts include sodium hydrogen sulfite, potassium hydrogen sulfite, etc., and these salts can be used in amounts of 0.5 to 100% per molecule of glutaraldehyde, depending on the whitening required of the fibers to which proteins are fixed. It is desirable to use it in combination with glutaraldehyde at a ratio of 3 to 3 molecular equivalents, preferably 2 molecular equivalents, and usually 01 to 30%, preferably 0.
It is used at a concentration of 5-1.0%. Within these concentration ranges, protein fixation can be easily carried out without coloring the m-fibers.

In addition, in order to suppress excessive swelling of the protein during processing and to ensure stable protein fixation, salts that have a protein molecule aggregation effect, such as neutral salts such as sodium sulfate, potassium sulfate, and sodium chloride, are added to the processing solution. It is desirable to add weak salts such as sodium hydrogen carbonate, and from the viewpoint of the effect of addition, these salts are usually 0.01 to 0.3
It is preferable to add it to the processing solution at a concentration of %.

The protein fixing method of the present invention can be carried out in the same manner as the known serinone fixing method, and can be carried out, for example, by soaking the fibers in a treatment bath in which the fibers have been treated. It is preferable to perform this treatment near neutrality because it is easy to work with. The iG degree of the treatment may be any temperature that does not cause protein denaturation or partial dissolution, and the treatment time can be shortened as the treatment temperature is higher, and can be appropriately selected in consideration of workability. Although not particularly limited, usually 40 to 50°C
The desired fixing process can be carried out in about 60 minutes.

EXAMPLES Next, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto.

Example 1 5 kg of 27 denier raw silk was set in a three-tube jet skein collector, and placed in a treatment bath containing a treatment liquid with the following formulation at a bath ratio (yarn weight to treatment liquid weight ratio) of 1:25. 6 at 50℃
The treated raw silk was treated for 0 minutes, thoroughly washed with water, and dried with φ to obtain processed raw silk with serinone fixed thereon.

Treatment liquid prescription ingredients % Glutaraldehyde/sodium bisulfite adduct (manufactured by Nguma Chemical Co., Ltd.) 0.8 Anhydrous sodium sulfate 02 water
The processed raw silk that has been adjusted to 100% has a slight increase in white discoloration compared to the unprocessed raw silk, almost no coloration is observed, and has a smooth e texture, with a 0%
Even when boiled in 5% soap solution for 60 minutes, the weight hardly changed.

A similar raw silk was fixed with serinone using a conventional method using glutaraldehyde (Lamkin-50, manufactured by Nippon Distilling Co., Ltd.) alone, and compared with the processed yarn obtained above which had been fixed according to the present invention. The results are shown in Table 1.

Table 1 Note: * Soil; is white with almost no coloration.

+: Indicates a pale grayish yellow color.

-1-+ + +: Indicates yellowish brown color.

As shown in Table 1, according to the method of the present invention, raw silk can be fixed with serinone without coloring by taking advantage of the fixing action of glutaraldehyde.

Example 2 Layer phase IKg was well dissolved in 5% caustic soda solution 10C, and then 10% hydrochloric acid solution was added to make it weakly alkaline (+)L.
[7, 5 to 85) to prepare a dispersion.

This dispersion was impregnated into Fuji silk by a conventional method, and after drying,
The fabric was fixed by steaming for 0 minutes to obtain fabric weight processed K) fabric (weight increased by 85%). This silk cloth was passed through a treatment solution having the following formulation to obtain a 100% silk cloth. This squeezed cloth was steamed for 15 minutes to obtain a processed silk cloth.

Processing liquid prescription ingredients % Glutaraldehyde (Lamkin-50) 0.5
Sodium bisulfite 1.0 water
Adjustment to 100% When this processed silk cloth was soaked in a 0.5% soap solution for 30 minutes, no coloring occurred and the weight loss rate was only 1.6%. On the other hand, the weight loss rate of the silk fabric that was not fixed was 7.8%.

Effects of the Invention According to the present invention, it is possible to fix proteins on fibers without problems such as coloring by taking advantage of the excellent protein fixing action of glutaraldehyde. For example, it is possible to fix serinone on raw silk without problems with coloring. By doing so, you can increase its value as summer clothing. Furthermore, it is possible to utilize strata that have hitherto been hardly put to effective use, and it is possible to make use of unused resources. In addition, various fibers (
It is possible to improve the durability of protein impregnation or coating processing to improve the texture and dyeability of R.

Claims (6)

[Claims] (1) A method for fixing protein on protein-containing fibers, which comprises treating the protein-containing fibers with a treatment solution containing an alkali metal adduct of glutaraldehyde and bisulfite to insolubilize the protein on the fibers. (2) The fixing method according to item (1) above, wherein the protein is sericin. (3) The fixing method according to item (2) above, wherein the fiber is raw silk. (4) A method for fixing protein on protein-containing fibers, which comprises treating the protein-containing fibers with a treatment solution containing glutaraldehyde and an alkali metal bisulfite salt to insolubilize the protein on the fibers. (5) The fixing method according to item (4) above, wherein the protein is sericin. (6) The fixing method according to item (5) above, wherein the fiber is raw silk.