JPH0116951B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to plant fiber yarns such as cotton yarn, rayon (viscose rayon, copper ammonia rayon,
This involves a method for producing shape-memory plant fibers that have built-in elasticity that conventional plant fiber yarns cannot exhibit, by applying a unique processing to (acetate rayon).

[Prior Art] Conventionally, as a method of imparting elasticity to raw silk, a patent application filed in 1972 by the same person as the inventor and the patent applicant has been proposed.
There is an invention in No. 97401, which imparts excellent elasticity to raw silk, but this method of imparting elasticity to cotton yarn and rayon, which are plant fiber yarns that are different from raw animal fiber yarn, is as follows. In the past, there was no comparison at all.

However, one way to give stretchability to vegetable fiber yarns is to use "twist shrinkage" using twisted yarns, but the yarns produced by this method do not have shape memory, and the yarns do not have shape memory. Not only does it become hard and shrink as soon as it is twisted, making it inconvenient for spinning and knitting, but it also loses its elasticity and becomes "rough" with repeated washing. It goes without saying that the structure is different, but even in terms of effectiveness, it is a method that is significantly inferior.

Another improvement of vegetable fiber threads, focusing on their swelling properties, was invented in Japanese Patent Application No. 111655/1983, filed by the same inventor as the patent author. This is made by adsorbing animal protein onto rayon and then drying it.
Steam at 100-110℃ for more than 30 minutes, then 90-95℃ for 30 minutes in a solution of chrome alum and soda carbonate.
After treatment to make the adsorbed animal protein insoluble in water, the animal protein adhering to the surface of the thread was washed off with a surfactant, and finally it was soaked in a solution of Glauber's salt and alum for 30 minutes. It is characterized by providing swelling properties when boiled. According to this, rayon has wrinkle resistance, volume, suppleness,
It exhibits excellent properties such as texture, feel, and luster equivalent to silk, heat retention, reduced generation of static electricity, prevention of settling, and swelling properties.

However, apart from the above-mentioned excellent properties, if stretchability could be imparted to rayon and cotton yarn, which is the same vegetable fiber yarn as rayon, it would be possible to obtain unprecedented suitable fabrics and knitted fabrics. Moreover, if it were possible to create shape memory of the so-called elasticity, in which the yarn does not exhibit elasticity in the form of yarn but exhibits elasticity after weaving or knitting, it would be extremely convenient for weaving and knitting. In addition, a solution to this problem has been awaited since it will expand its usage.

[Problems to be solved by the invention] The present invention has excellent wrinkle resistance and has a volume feel of about 20%.
It grows and is supple, with a texture similar to silk,
The amount of static electricity generated is as low as that of raw yarn, and its hygroscopicity is increased by about 50%, and because of its bulk, it contains a lot of air, which increases its heat retention, and it does not "get worn out" when washed. The purpose of the present invention is to provide a method for producing a shape memory plant fiber that has an expansion/contraction ratio of about 50% and exhibits various excellent properties not found in the past.

[Means for Solving the Problems] The above-mentioned object of the present invention is to adsorb animal protein to which soy milk is added to cotton yarn and rayon, which are vegetable fiber yarns, and after drying, the cotton yarn is
1000~2500T/M, rayon 1500~3000T/M
It is characterized by having built-in elasticity by twisting, then steam setting with steam at 110 to 130°C for 10 to 15 minutes, and then untwisting in the opposite direction to the twisting direction, that is, in the Z or S direction. This is achieved by a method for producing shape memory plant fibers.

[Example] Next, an example of the method for producing a shape memory vegetable fiber of the present invention will be described.

First, to a solution of a collagen protein derivative having a weight concentration of 3 to 8%, soy milk is added in an amount equal to or more than 5% of the weight of the thread used in the soybean state, mixed well, and kept at about 30°C. A piece of cotton thread #100/double thread as shown in Figure 1 is soaked in this solution and left for about 60 minutes. This causes the cotton thread to absorb about 40% of the collagen protein derivative solution by weight of the thread. Then dehydrate it and dry it
After twisting the dried cotton yarn 2,000 times in the S direction, steam setting was performed for 10 minutes with steam at 130℃ while the bobbin was in place.
Thereafter, it is untwisted 2,200 times in the opposite direction to the initial direction, that is, in the Z direction, to prevent it from twisting, and is completed by skeining or cone winding. As a result, a cotton shape memory yarn with built-in crimpability as shown in FIG. 2 is obtained.

Next, another embodiment of the present invention will be described.

Viscose rayon spun yarn No. 40 shown in Figure 4/
Prepare double yarn (rayon long fiber is exactly the same).
This is immersed in a mixture of the collagen protein derivative and soy milk and left for about 60 minutes. As a result, about 40% of the yarn weight of the collagen protein derivative solution is absorbed into the rayon spun yarn.

Next, it is dehydrated and dried, twisted 1500 times in the direction of the ply twist of the spun yarn, steam-set with steam at 130℃ for 10 minutes, and then twisted 1500 times in the direction opposite to the first twist.
Twist the yarn, prevent it from twisting, and finish with skeining or cone winding. In the above manner, a shape memory yarn of spun rayon yarn having built-in crimpability as shown in FIG. 5 is obtained.

Then, by bathing the cotton shape memory yarn and the rayon shape memory yarn in steam or hot water, the stored elasticity immediately appears.
As shown in FIGS. 3 and 6, this is a shape memory yarn made of cotton and rayon that has an elasticity of about 50%. In general, the number of twists is higher for thinner fibers and longer fibers, and lower for thicker and shorter fibers.
In addition, it is increased or decreased as appropriate to adjust the built-in elasticity.

Further, the rayon may be copper ammonia rayon or acetate rayon in addition to the above-mentioned viscose rayon, and similar shape memory threads can be obtained by the same method as above. The molecular structure of the collagen protein derivative used in the present invention is RCONH (R″CHCONHCHR″) nCOOX (X=
(sodium, potassium, ammonium, other organic amines, alcohol, R, R'' = residues of C ₁₂ to _{C 18} saturated or unsaturated fatty acids).In addition, as animal proteins other than the collagen protein derivatives mentioned above, A solution of a hybroin protein derivative or a mixed solution of a keratin protein derivative and a collagen protein derivative may be used in the same manner as the collagen protein derivative solution.

The molecular structural formula of the hybroin protein derivative is as follows.

X = Na, H Y = 1/2 (SO ₄ ) R'', R = C ₁ to _{C 10} saturated or unsaturated hydrocarbon residues The molecular structure of the keratin protein derivative is as follows. .

X=Na, _NH3 , H Y=Cl R, R'= _C1 to _C10 saturated and unsaturated hydrocarbon residues and sulfur-containing compound residues [Effect] According to the present invention, The animal protein is adsorbed onto the cotton yarn and rayon fibers to impart the properties of animal protein to the plant fibers, and then thermoplasticity is imparted and woolly processed (twisted and heat set) in the same way as synthetic fibers. By untwisting the yarn to create expansion and contraction), shape memory yarn with unprecedented permanent elasticity can be obtained. Next, this shape memory yarn is woven and knitted into cloth and knitted fabric,
By bathing these fabrics and knitted fabrics in steam or hot water, they regain their built-in elasticity,
Expansion rate is more than 50%, moisture absorption is about 50%, and swelling rate is 60%.
% or more, and the heat retention property is also significantly increased, resulting in a plant fiber fabric or knitted fabric that is extremely elastic, bulky, and has excellent heat retention properties.

In addition, it is difficult to adsorb animal protein to vegetable protein, but by adding soy milk to the animal protein solution, the saponin and listin contained in soy milk are absorbed into the protein of the vegetable fiber yarn. It exhibits the effect of easily adsorbing proteins, and the adsorption effect is increased by adding 5% or more of the weight of soybean milk to the weight of the yarn used.

Furthermore, fabrics woven and knitted with this shape memory thread,
The knitted fabric does not "sag" due to washing, has strong elasticity (stretch back), has a texture similar to silk, is supple, and generates as little static electricity as raw yarn. It has excellent properties that cannot be achieved by other vegetable fiber yarns.

[Brief explanation of drawings]

FIG. 1 is a photographic image showing the raw state of cotton yarn, FIG. 2 is a photographic image showing shape memory cotton yarn obtained by adsorbing a collagen protein derivative on the cotton yarn shown in FIG. 1 by the manufacturing method of the present invention, and FIG. This is a photographic image of the cotton yarn shown in FIG. 2 subjected to memory recall treatment by the manufacturing method of the present invention. FIG. 4 is a photographic image showing a spun rayon yarn, FIG. 5 is a photographic image showing a shape memory yarn obtained by adsorbing a collagen protein derivative to the spun rayon yarn shown in FIG. 4 by the manufacturing method of the present invention, and FIG. Fifth
This is a photographic image of the spun rayon yarn shown in the figure subjected to memory recall treatment using the manufacturing method of the present invention.

Claims (1)

[Scope of Claims] 1. Animal protein mixed with soy milk is adsorbed onto cotton thread and rayon, which are plant fiber threads, and after drying, S
Or 1000~2500T/ for cotton yarn in the Z direction
In the case of M, rayon, it is twisted at 1500 to 3000 T/M, then steam set for 10 to 15 minutes with steam at 110 to 130°C, and then twisted in the opposite direction to the twisting direction, that is, Z.
Alternatively, a method for producing a shape memory vegetable fiber, which is characterized by incorporating elasticity by untwisting it in the S direction. 2. The method for producing a shape memory plant fiber according to claim 1, wherein the animal protein is a collagen protein derivative. 3. The method for producing a shape memory plant fiber according to claim 1, wherein the animal protein consists of a hebroin protein derivative. 4. The method for producing shape memory plant fibers according to claim 1, wherein the animal protein is a mixture of a keratin protein derivative and a collagen protein derivative.