JPH02277885A - Method for processing silk filament with fibroin protein - Google Patents

Abstract

PURPOSE:To enhance quality characteristics by adsorbing a solution prepared by adding egg white to fibroin protein on silk filaments, subjecting the fibroin protein to insolubilizing treatment, adhering the fibroin protein, increasing coherency of the silk filaments, improving strength and enhancing elasticity and hardness of the above-mentioned filaments. CONSTITUTION:A solution prepared by adding egg white to fibroin protein is adsorbed on silk filaments. The adsorbed egg white is then insolubilized by steam setting and the adsorbed fibroin protein is insolubilized with ethanol or an acid. The above-mentioned protein and egg white are adhered to the silk filaments to increase the coherency of the silk filaments and improve strength and hardness. Thereby, quality characteristics are enhanced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to processing of various silk fibers such as raw silk, refined silk, silk fabric, and cotton to increase the bonding force (bonding force) of the fibers. By increasing the strength (mechanical strength such as tensile strength and abrasion resistance).

This invention relates to a silk fiber processing method that improves the quality characteristics of various #I woven fibers by increasing the elasticity and hardness of silk fibers, and is devised so that it can be used to expand various uses.

[Prior art] Raw silk is generally discharged from both jaws of silkworms, so
As shown in the figure, it consists of two filaments 2, and the composition of the filaments is a three-layered structure consisting of hibroin 2a, a mixture of hibroin and sericin 2b, and sericin 2c from the inside.

The fineness (thickness) of this raw silk is about 3 denier, and generally 6 to 7 pieces of raw silk are combined at the stage of spinning.
Spin yarn to medium denier. When this raw silk is scoured in its current state, sericin 2c, which has adhesive strength, dissolves and
Silk separates into two filaments each,
It doesn't become a thread.

Therefore, in the case of silk fabrics, before scouring the raw silk, the spun threads are twisted into single threads or multiple threads together.

Typical practice is to mechanically join the threads.

[Problems to be Solved by the Invention] However, twisting increases the cost in producing silk thread, and does not increase the inherent strength of raw silk, so it may not necessarily be possible depending on the intended use of silk fibers. It's not something that's needed.

Furthermore, by refining the raw silk, sericin 2c is dissolved, so that the volume of the silk is reduced compared to the original raw silk, so-called ridge reduction.

Therefore, if it is possible to adsorb hybroin protein, which is a silk protein, to silk fibers such as raw silk, it becomes possible to increase the strength and increase the amount by increasing the binding force.

However, even if the silk fibers are immersed in a hisbroin protein solution in order to make the silk fibers absorb the hisbroin protein, the hisbroin protein does not adsorb to the silk fibers because the adhesiveness of the hisbroin protein is low.

Therefore, in the present invention, we have devised a method for adsorbing hybroin protein to tata fibers.

[Means for Solving the Problems] The above-mentioned problem is to adsorb a solution of hebroin protein and albumen onto silk fibers, and then to fix the hebroin protein to the silk fibers by treating the hebroin proteins and albumen to be insoluble. The problem is solved by a silk fiber processing method using hybroin protein, which is characterized by the following.

[Example] Examples of the processing method for various silk fibers in the present invention will be described.

A method for producing a hibroin protein solution is to dissolve refined silk with calcium chloride and ethanol or lithium bromide and ethanol, and then desalt it by electrodialysis using an ion exchange membrane to produce a hibroin protein solution. generally known.

(Example 1) To this 10% weight concentration solution of hibroin protein (if the concentration is over 10%, hibroin protein gels and cannot be used), add a solution of 50g of egg white in water and mix 1.5Q. Make a solution.

This mixed solution is adsorbed onto raw silk containing sericin by a gluing (single gluing) method. After drying this raw silk, steam setting is performed for 30 minutes at a temperature of 80°C to 100°C.
It is immersed in 0% ethanol for 20 minutes to 30 minutes, or in hydrochloric acid or acetic acid with a volume concentration of 5% at a temperature of 20° C. to 30° C. for 30 minutes to 1 hour.

According to this processing method, by adding highly sticky egg white to the hibroin protein solution, the hibroin protein is easily adsorbed to the raw silk, the egg white becomes insoluble by steam setting, and the hibroin protein is removed by ethanol or acid. Becomes insoluble. Moreover, according to the above-mentioned indissolution treatment with hydrochloric acid or acetic acid.

The hardness of raw silk becomes higher than when treated with ethanol.

(Example 2) A solution prepared by dissolving 20 g of egg white in water is added to 1 Ω of a 10% weight concentration solution of hibroin protein to prepare a mixed solution of 1°5Q.

This mixed solution is adsorbed onto refined silk using a gluing method (single gluing). Then, egg white and hibroin protein,
It is fixed to silk by the insoluble treatment described in Example 1 described above.

According to this processing method, as shown in FIG.

The silk filament 1 has a three-layer structure consisting of hisbroin 1a, a mixture of hisbroin and sericin 1b, and a mixture IC of hisbroin and sericin from the inside. Since the mixture 1b of hibroin and sericin having the composition is almost the same, they are integrated as a composition, resulting in an increase in weight of about 3%.

Since the mixture 1c of hybroin and sericin adsorbed onto the silk has adhesive properties, the refined silk filaments 1 do not split into fibrils and become monofilaments with increased strength and hardness.

(Example 3) A solution of egg white Log dissolved in water was added to a 10% weight concentration solution IQ of hibroin protein to prepare a 1.2Q mixed solution. This mixed solution is adsorbed onto silk fabric using a mangle method. After drying this silk fabric, the temperature is 80℃~
Steam setting is performed at 100° C. for about 10 minutes, followed by the non-dissolution treatment of Example 1 described above.

According to this processing method, in the case of a silk fabric produced at a high density, hibroin protein also adheres to the weave, and both the silk fibers and the hibroin protein layer have air permeability.
This silk fabric is waterproof and has the excellent ability to allow air and steam to pass through.

(Example 4) To 10% weight concentration solution IQ of hibroin protein, 50 g of egg white dissolved in water was added to prepare a 1.2Q mixed solution. This mixed solution is applied to cotton cotton or M staple fibers made into a flat plate using a card machine using a spray machine. After compressing this flat silk fiber with a roller and drying it,
Steam setting is performed, firstly, ethanol with a volume concentration of 70% to 80% is applied, and heat treatment is performed at 60°C to 70°C.

According to this processing method, an insoluble silk nonwoven fabric, which has not existed before, can be obtained. If this silk nonwoven fabric and silk fabric are layered and bonded together, useful clothing and industrial materials with a wide range of uses can be obtained.

(Example 5) In the body of a mature silkworm, the H chain (molecular weight of 300,000 to 350,000) and the L chain (molecular weight of 1,50,000 to 2.5
10,000), separate and take out only the heavy chain hybroin protein, and add it to a solution of calcium chloride and ethanol.
Alternatively, it can be dissolved in a solution of lithium bromide and ethanol. At this time, salt is generated in the solution, which is desalted by electrodialysis using an ion exchange membrane to obtain a hisbroin solution with a certain high molecular weight.

A solution IQ of this high molecular weight hebroin protein with a weight concentration of 10%
To this, dissolve egg white Log in water and add it to make a 1.2Ω mixed solution. Then, this mixed solution is adsorbed onto a coarsely woven silk cloth by a mangle method, and then the steam setting and non-dissolving treatment shown in Example 3 described above are performed.

The membranous silk fabric obtained by this processing method can be used for medical purposes as artificial skin.

On the other hand, if a mixed solution of the high-molecular hibroin protein and egg white is applied to the silk thread to perform an indissolution treatment.

It becomes possible to use it as a suture thread before surgery.

[Effects of the Invention] As detailed above, conventionally it has been difficult to fix hibroin protein to silk fibers, but according to the present invention, it is possible to use hibroin protein mixed with highly adhesive egg white. This allows hibroin protein to be easily adsorbed onto various silk fibers.

Then, by fixing egg white and hibroin protein to the silk fibers that have adsorbed hibroin protein by insoluble treatment, the fineness and weight of the silk fibers are increased, the hardness of the silk fibers is increased, and the cells of the silk filaments are increased. Resultant force (combining force)
It increases the Furthermore, by adsorbing the egg white to the silk fibers, the insolubilization of the hibroin adsorbed to the silk fibers is promoted.

Therefore, the effect obtained by fixing the mixed solution of hibroin and egg white according to the present invention to various silk fibers such as raw silk, refined silk thread, silk fabric, silk cotton, coarsely woven silk fabric, and silk thread. Its effective uses will be described below.

First, when raw silk is processed according to the present invention, the sericin contained in the raw silk becomes semi-insoluble, and the binding force increases by 200% or more, making twisting unnecessary. Therefore, by using the above-mentioned processed raw silk, even for silk organdies, hakama, etc., which could not be piece-dyed and washed because they are made of raw silk, they can be piece-dyed and washed, and their strength is increased. be.

Next, when the refined silk thread is processed according to the present invention,
In addition to increasing the fineness and preserving the luster.

The silk filament increases its conjugation force and becomes a monofilament without splitting, which increases its strength.

By increasing the hardness and further increasing the stiffness of the silk fibers, the elasticity of a single knitted fabric using this silk thread is increased, and its form is stable, that is, the amount of elongation and shrinkage is reduced by 4 degrees. In addition, if the silk thread used for velvet or carpet is processed to increase its hardness, the piles will not fall easily and the surface will have a uniform gloss, making it possible to provide excellent velvet or carpet.

Next, if a tightly woven silk fabric is processed according to the present invention, the hibroin protein remains entrapped in the woven fabric and becomes clogged, so that it can be used as a breathable waterproof fabric.

Furthermore, when the process of the present invention is applied to silk cotton or short silk fibers made into a flat plate using a carding machine, silk 100
% of non-woven fabric can be obtained, which can be used as clothing and industrial materials for various purposes.

When a coarsely woven silk fabric is processed with a solution of the high molecular weight hebroin protein and egg white of the present invention, it is possible to provide an excellent artificial skin that has never existed before. When applied, a suitable surgical suture made of animal protein can be obtained.

[Brief explanation of drawings]

The fjS1 diagram is a patent application for silk fiber using the hibroin protein of the present invention. Mizushima Shigeru Mizushima

Claims (2)

[Claims] (1) Silk fibers made of hibroin protein, characterized in that a solution of hibroin protein and egg white is adsorbed onto silk fibers, and then the hibroin protein and egg white are treated to be insoluble, thereby fixing the hibroin protein to the silk fibers. Processing method. (2) Silk made of hibroin protein according to claim 1, characterized in that the albumen adsorbed to the silk fibers is treated to be insoluble by steam setting, and the hibroin protein adsorbed to the silk fibers is treated to be insoluble by ethanol or acid. Fiber processing methods.