JPH0143069B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a new shape memory acrylic/protein copolymer fiber that can exhibit various excellent properties that cannot be exhibited by conventional acrylic/protein copolymer fibers. This relates to a manufacturing method.

[Prior Art] Since the present invention relates to a new fiber based on a completely new structure and has no improvement elements, so-called prior art does not exist.

To put it simply, conventional acrylic/protein copolymer fibers have been given elasticity by twisting them with twisted yarn, but this does not have shape memory.
The yarn becomes stiff when twisted and shrinks as soon as it is twisted, which is not only inconvenient for weaving and knitting, but also loses its elasticity with each wash.
The yarn becomes rough, and if it is untwisted once, it loses its resilience and becomes the same as the original untwisted yarn, which is of course different from the present invention in its basic technical configuration. Even if it is effective, it is a method that is significantly inferior.

[Problems to be solved by the invention] The present invention has excellent wrinkle resistance and also provides a voluminous feel.
It is 30% more flexible, has about 50% more elasticity, has a texture very similar to silk, generates the same amount of static electricity as raw yarn, and has about 50% more moisture absorption. Due to its bulk, it has a high air content, which increases its heat retention, and it has exceptional resistance to wear and tear due to washing, and can exhibit unprecedented properties over a long period of time. The purpose of this invention is to provide a method for manufacturing shape memory acrylic/protein copolymer fibers that is uniquely designed and can be manufactured efficiently.

[Means for Solving the Problems] The above-mentioned object of the present invention is to apply a collagen protein derivative solution, a hybroin protein derivative solution, a keratin protein derivative solution, or a mixed solution of a plurality of these protein derivative solutions to an acrylic/protein copolymer fiber. One of these solutions is adsorbed while retaining the properties of each protein, and after drying, the yarn is twisted in the S or Z direction and steam-set for 5 minutes or more with steam at 100°C to 120°C, and then in the opposite direction from the beginning, i.e. Z
Or, a method for producing a shape memory acrylic/protein copolymer fiber characterized by incorporating elasticity by untwisting it in the S direction, and a collagen protein derivative solution, a hybroin protein derivative solution, in the acrylic/protein copolymer fiber, After adsorbing either a keratin protein derivative solution or a mixed solution of these protein derivative solutions while retaining the properties of each protein, it is dried and knitted at 100°C to 120°C. Shape-memory acrylic/protein that memorizes the shape of the crimp formed by knitting by steam-setting with steam at ℃ for 5 minutes or more, disintegrating it, immersing it in water, and drying it under tension. This can be achieved by a method for producing copolymer fibers.

[Example] A method for producing the shape memory acrylic/protein copolymer fiber of the present invention will be described.

Acrylic protein copolymer fibers are coated with a collagen protein derivative solution, a hebroin protein derivative solution, a keratin protein derivative solution, or a mixed solution of multiple solutions of these protein derivatives in any ratio. It is produced by adsorption while retaining its properties. The acrylic/protein copolymer fiber referred to herein is a fiber obtained by graft copolymerization of milk casein and acrylonitrile, and is a porous semi-synthetic fiber.

In other words, the animal protein that enters and adheres to the numerous pores of this acrylic/protein copolymer fiber thread binds to milk casein protein by applying heat (moist heat), and becomes insoluble in water. It is.

Next, the molecular structural formula of each protein is listed.

Molecular structural formula of collagen protein derivative RCONH (R″CHCONHCHR″)COOXX=Na,
K, organic amines such as ammonium, alcohols.
R, R″=C ₁₂ to C ₁₈ saturated or unsaturated fatty acid residues.

Molecular structural formula of hybroin protein derivative R, R′, R″=residues of C ₁ to C ₇ alkyl groups and residues of phenyl alkyl groups.

X=H, Na, K, Ca Molecular structural formula of keratin protein derivative R, R′, R″, R=C ₁ to C ₇ alkyl group residue and phenyl alkyl group residue.

X=H, Na, K, Ca Two examples of the method for producing the shape memory acrylic/protein copolymer fiber of the present invention will be described below: a method of applying torque by twisting yarn and a method of applying torque by knitting.

(Example 1) Acrylic/protein copolymer fiber yarn of 100 denier,
The yarn is immersed in a hibroin protein derivative solution having a weight concentration of 3 to 8% at room temperature for 10 minutes or more to impregnate the yarn with a solution that is 30% of the yarn weight. Next, after drying the acrylic/protein copolymer fiber yarn, it is twisted at a rate of 2500 times/m in the Z direction, and steam-set at 110°C for 20 minutes while still in the cylinder. Thereafter, it is twisted in the S direction at 2,200 times/m, and then it is further prevented from twisting and fried to obtain a shape memory acrylic/protein copolymer fiber yarn.

In this state, the shape memory acrylic/protein copolymer fiber yarn is untwisted in the S direction, so it appears to be in an untwisted state as shown in Figure 2, but in reality it is twisted in the Z direction by 2500 degrees.
This shape memory acrylic/protein copolymer fiber yarn remembers its shape when twisting torque of twist/m is applied.
When bathed in hot water or steam at a temperature of 60°C or higher, the memorized shape is immediately recalled, and it becomes twisted at 2500 twists/m in the Z direction, as shown in Figure 3.

After immersing the memory-restored shape-memory acrylic/protein copolymer fiber yarn in water at 20°C or lower, it is immediately dried while applying a weight that is at least three times the weight of the yarn, or a tension equivalent to this weight. When this happens, the memory returns to the state before the memory was recalled, as shown in FIG. 2, and this change in shape can be repeated over and over again.

(Example 2) A 75-denier acrylic/protein copolymer fiber thread is immersed in a keratin protein derivative solution having a weight concentration of 3 to 8 at room temperature for 10 minutes or more to impregnate the thread with 30% of the weight of the thread. Next, after drying the acrylic/protein copolymer fiber yarn, it is knitted into a knit as shown in Figure 4.
Steam set this with steam at 110°C for 20 minutes. After that, when this knit fabric is unknitted, an acrylic fabric with knit loops (stitches) is created as shown in Figure 5.
It becomes a protein copolymer fiber yarn, which is then immersed in water at 20°C or less and then dried while applying a weight that is at least three times the weight of the yarn, or a tension equivalent to this weight, to form a shape memory acrylic/protein copolymer fiber. Yarn is obtained.

In this state, the shape-memory acrylic/protein copolymer fiber yarn appears to be untwisted as it is under tension, but it actually remembers the shape of the loops (knits) of the knit, and this shape-memory acrylic/protein copolymer yarn When the polymeric fiber yarn is exposed to hot water or steam at a temperature of 60°C or higher, the memorized shape is immediately recalled, and the knitted fabric is unknitted to reveal loops (knits) as shown in Figure 5.

After the shape-recalled shape-memory acrylic/protein copolymer fiber yarn is immersed in water at 20°C or below, it is immediately applied with a weight of more than three times the weight of the yarn, or a tension equivalent to this weight. When it dries, it returns to its previous shape, and this change in shape can be repeated over and over again. Furthermore, regarding the influence on dyeability, there is no problem in the two examples described above.

Although the above two examples have been given, the hybroin protein derivative solution and keratin protein derivative solution used here are not limited to these.
The solution may be a collagen protein derivative solution, a hybroin protein derivative solution, a keratin protein derivative solution, or a mixed solution of a plurality of these three solutions in any ratio.

In the above example, the elasticity is approximately
50%, but this expansion/contraction rate also depends on the number of twists and the knit scale (degrees or gauge).
You can set it freely by changing .

[Effect] According to the present invention, any animal protein among a collagen protein derivative solution, a hybroin protein derivative solution, a keratin protein derivative solution, and a plurality of mixtures of these proteins is adsorbed onto the acrylic/protein copolymer fiber thread. As a result, the casein protein and animal protein in the acrylic/protein copolymer fiber are bonded and adsorbed, giving thermoplasticity not found in the acrylic/protein copolymer fiber. , untwisting to create elasticity)
becomes possible. During this wooly processing, synthetic fibers are set by dry heat, but moist heat setting is more effective for acrylic protein copolymer fibers with adsorption and bonding of animal protein, and shape-memory acrylic/protein copolymer fibers and animal protein copolymer fibers. Although both ordinary synthetic fibers such as acrylic fibers and protein copolymer fibers that do not adsorb proteins have thermoplasticity, ordinary synthetic fibers have thermoplasticity when reheated to the shape changed during heating. In contrast, shape memory acrylic/protein copolymer fibers can permanently maintain their shape when heated.

From the above, in the case of acrylic/protein copolymer fiber yarn that has regained its memorized elasticity, the elasticity should be increased to 50% or more, the hygroscopicity to be approximately 50%, and the swelling rate to be approximately 60%.
The heat retention capacity also increases significantly. In addition, both woven and knitted fabrics made from this processed acrylic/protein copolymer fiber yarn do not sag due to washing, etc., have strong tensile strength (stretch back), and are the closest to silk in terms of physical properties and feel compared to any other fibers. It is flexible, generates little static electricity, and exhibits excellent properties that cannot be achieved with other fibers.

[Brief explanation of drawings]

Figure 1 is a photographic image showing the filament state of acrylic/protein copolymer fiber, and Figure 2 is a shape memory acrylic/protein copolymer obtained by adsorbing hibroin protein derivative solution on acrylic/protein copolymer fiber and applying twisting torque. Figure 3 is a photographic image showing the shape memory acrylic/protein copolymer fiber yarn shown in Figure 2 after memory recall, and Figure 4 is a photographic image showing the shape memory acrylic/protein copolymer fiber yarn shown in Figure 2. A photographic image showing the state of knitting with polymeric fiber yarn, Fig. 4
This is a photographic image showing a processed acrylic/protein copolymer fiber yarn in which the knitted knit shown in the figure has been disassembled to reveal loops.

Claims (1)

[Claims] 1. A collagen protein derivative solution, a hibroin protein derivative solution, a keratin protein derivative solution, or a mixed solution of each of these protein derivative solutions is applied to the acrylic/protein copolymer fiber. It is adsorbed while retaining its properties,
After drying, twist in S or Z direction to 100℃~120℃
A shape memory acrylic/protein copolymer fiber characterized in that it has built-in elasticity by steam setting it with steam for 5 minutes or more and then untwisting it in the opposite direction to the initial direction, that is, in the Z or S direction. Production method. 2. A collagen protein derivative solution, a hebroin protein derivative solution, a keratin protein derivative solution, or a mixed solution of each of these protein derivative solutions is applied to the acrylic/protein copolymer fiber while retaining the properties of each protein. After being adsorbed in the same condition, it is dried, knitted, steam-set with steam at 100°C to 120°C for more than 5 minutes, and then unknitted.
A method for producing a shape memory acrylic/protein copolymer fiber, which comprises soaking it in water and then drying it under tension to memorize the shape of a crimp formed by knitting.