JPS638237B2 - - Google Patents

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD The present invention relates to improving the texture of acrylic spun yarn, more specifically, for acrylic woven and knitted fabrics.
This relates to an acrylic spun yarn that has been subjected to a texture improvement process that gives it a waist, tension, and silky feel, as well as a linen-like dry feel. Conventional technology Acrylic spun yarn has many advantages such as its rich bulk, soft feel, vivid coloring, heat retention, and lightness, which are comparable to other synthetic fiber spun yarns and wool yarns. It has the following characteristics. However, one of the drawbacks of acrylic products in terms of feel is that they lack firmness, lack durability in terms of bulk, and lack durability in elastic recovery. Conventionally, synthetic fibers and natural fibers have been subjected to various treatments in order to cover up the inherent drawbacks of each fiber or to bring out even better properties. For example, in Japanese Patent Publication No. 57-13670, in order to improve the disadvantage of spun silk yarn, which is that the so-called stiffness of the yarn is smaller than that of raw silk, it is inferior in terms of drapability and texture. A method of forming a film made of fibroin has been proposed. In addition, in order to improve the disadvantages of the acrylic spun yarn mentioned above, for example, as in Japanese Patent Publication No. 14787/1987, a fiber treatment agent using an olefin-acrylic acid ester copolymer was used to improve the texture of the fiber. So-called resin processing has become publicly known to give elasticity and tension. In addition, many proposals have been made, such as a fiber treatment agent for preventing permanent curling and improving texture, as in Tokoku Kokoku No. 55-51072, and a fabric processing method for improving the texture, as in Tokoku Kokoku No. 57-27228. It is being done. Problems to be solved by the invention However, looking at these methods,
First, in the above-mentioned silk fibroin processed silk spinning, the silk fibroin liquid has a strong affinity for silk spinning and forms a strong film on the surface of the silk spinning. Even in the case of resin processing such as cheese, it is difficult to obtain a certain texture unless a small amount of resin liquid is applied uniformly. The drawback was that it was not possible to process threads that had a skein-like shape. On the other hand, since the adhesion between the fibers is too strong, the obtained texture is too rough and hard, and there is a drawback that it lacks a slimy or bulgy feeling and a stiff feel. In short, what these processing methods have in common is that they merely change the feel to a synthetic fiber-like feel, eliminate the sliminess of natural fibers, and lack the elegance. In view of this situation, the inventors of the present invention have developed a textile product that is highly durable and improves the waist feel, and also withstands external forces such as compression force and kneading effect during long-term use, and does not cause the so-called sagging phenomenon. The present invention was completed by searching for a new processed spun yarn. That is, the present invention provides a silk fibroin-processed acrylic spun yarn in which silk fibroin is filled at least in part between the fibers of the acrylic fiber spun yarn. Another object of the present invention is to industrially and easily produce a novel acrylic spun yarn that has excellent silky feel and elastic recovery power, and whose effects do not easily deteriorate after washing. Still another object is to provide a woven or knitted fabric using such quality acrylic spun yarn. Means for Solving the Problems As the acrylic spun yarn applied to the present invention, not only one made of 100% acrylic fiber but also one blended with other fibers can be used. In that case, it is necessary to contain at least 30% by weight of acrylic fibers, usually 50% by weight or more, preferably 70% by weight or more. The acrylic fiber may be one in which the acrylic polymer contains 80% by weight or more of acrylonitrile and 15% by weight or less of methyl acrylate, or the acrylic copolymer contains vinyl chloride and/or vinylidene chloride. It may contain 20 to 50% by weight. The method for producing the acrylic spun yarn of the present invention includes:
For example, using silk spinning waste as a raw material for silk fibroin, 100 parts by weight of this was added to 30 parts by weight of Marcel soap.
Parts by weight, using a solution of 3000 parts by weight of water, 90-98℃
The mixture was stirred and refined for 3 hours to reduce the residual glue to 0.1% or less, washed with water, and dried with hot air at 80°C. Next, 10 parts by weight of the dried, refined spinning waste was dissolved in 100 parts by weight of an aqueous solution of ethylenediamine and copper hydroxide (copper-ethylenediamine solution) at room temperature for 5 minutes, and immediately after dissolving, the pH was adjusted to 6.8 with a 10% acetic acid solution. and further add water to make a 5.0 to 5.5% by weight solution of silk fibroin. Then 1.5
Spun yarn 48 made of 100% denier acrylic fiber
I made a skein with a skein circumference of 150cm and a weight of 200g using double count yarn.
It is immersed for 30 minutes in an aqueous solution containing 5.0 to 5.5% of silk fibroin. Next, the skeins are lifted from the soaking tank and deliquified in a centrifugal separator at a speed of 1,600 revolutions per minute for 8 minutes, after which the skeins are subjected to a moist heat setting at 110 to 115 DEG C. for 15 minutes. This substantially shifts the intermolecular hydrogen bonds of fibroin from the α-type to the β-type, making it insoluble in hot water, and then drying it at 90° C. for 15 minutes. The concentration of the silk fibroin aqueous solution should be selected appropriately depending on the desired texture, silkiness, and the type, count, number of twists, etc. of the raw material spun yarn, but an aqueous solution with a concentration of 10% by weight or less is preferable. be. Rather, the concentration of the aqueous solution should be appropriately selected depending on the shape of the yarn to be processed, the dipping method, and the method of dewatering. In short, the amount of solid content of silk fibroin deposited at the time when water is removed by drying in the subsequent drying process determines the silkiness of the acrylic spun yarn. The amount of silk fibroin deposited is 1 to 15
A range of % by weight applies, preferably from 3 to 12
% by weight, more preferably 5 to 10% by weight. As mentioned above, silk fibroin liquid has a strong affinity for silk spinning and forms a strong film on the silk spinning surface.
On the other hand, the present inventors have found that the silk fibroin exhibits a special affinity for acrylic spun yarn, and that the mechanism in which it invades and fills the gaps between spun yarn fibers is a unique phenomenon in acrylic spun yarn. This is an attempt to skillfully utilize this unique phenomenon industrially. Incidentally, the results of attempts made using fibers other than acrylic fibers are as follows. That is, no affinity was observed for the polyester filament yarn, and when a slight external force was applied after drying, the silk fibroin became fine powder and was peeled off and scattered. The same applies to nylon filament yarn as to polyester filament yarn. Unlike the case of acrylic spinning, cotton yarn was processed so that the surface layer of the spun yarn was covered with a thin film. On the other hand, cotton yarn usually uses a large amount of alkali in dyeing, bleaching, mercerizing, etc. Although processing has been carried out on unscoured and unbleached cotton threads, the silk fibroin film has the drawback of being extremely susceptible to subsequent alkali treatment.
Therefore, it is not preferable to perform silk fibroin treatment on cotton yarn in advance and then perform alkali treatment afterwards. In addition, the acrylic spun yarn of the present invention has a 100%
%, it can also be twisted, woven, or knitted with other fibers. Furthermore, the range of the yarn count is not particularly limited and any yarn count can be used, but preferably yarns with a finer count than 20 count single yarn can bring about good results. However, it is not necessarily limited to this range. At the same time, the composite number of single yarns may be any number greater than or equal to 2, and there are no limitations on the composite shape or twist direction. Regarding the so-called spinning method for producing spun yarn, various spinning methods such as worsted spinning, short cotton spinning, air spinning, and wool spinning can be applied depending on the yarn quality and purpose. However, the present invention is a silk fibroin-processed spun yarn obtained by filling at least a portion of the voids between fibers of an acrylic spun yarn with silk fibroin, and by filling at least a portion of the voids between fibers with silk fibroin. This achieves the purpose of improving the texture and yarn quality. Therefore, when it comes to the fiber-to-fiber voids within a spun yarn, a stronger effect can be expected from a spun yarn that remains narrow rather than too wide. For this reason, non-bulky yarns can be expected to have stronger effects than so-called bulky yarns for the above reasons. However, it is not necessarily limited to this depending on the intended use or desired texture. Examples Hereinafter, the present invention will be specifically explained using examples. In addition, (%) in the examples is "weight %"
means. Example 1 Frame circumference 150 with 48 count twin yarn made of 100% 1.5 denier acrylic fiber (Kanebo Acrylic)
A skein with a weight of 200 g/skein was prepared and immersed in an aqueous solution containing 5.0 to 5.5% silk fibroin for 30 minutes. Next, the skeins were lifted from the soaking tank and deliquified for 8 minutes at a speed of 1,600 revolutions per minute using a centrifugal dehydrator.The skeins were then subjected to a wet heat setting at 110 to 115°C for 15 minutes, and then heated to 90°C. Dry for 40 minutes. For the silk fibroin stock solution, silk spinning waste was used as the raw material, and 100 parts of this was stirred and refined at 95 to 98°C for 3 hours using a solution of 30 parts of Marcel soap and 3000 parts of water to remove the remaining glue. The content was reduced to 0.1% or less, washed with water, and then dried with hot air at 80°C. Next, to 100 parts of an aqueous solution (copper-ethylenediamine solution) consisting of 8% ethylenediamine and 6% copper hydroxide,
10 parts of the dried scoured spinning waste was stirred and dissolved at room temperature for 5 minutes, and immediately after dissolving, the PH was added with a 10% acetic acid solution.
6.8 and further added water to produce a 5.0 to 5.5% by weight solution of silk fibroin. The silk fibroin processed acrylic spun yarn produced as described above was dyed to create jersey knit and rubber knit fabrics, and the texture of the knitted fabrics was rich in smoothness and tension, and had a linen-like dry feel. It was extremely elegant. The content of silk fibroin in the processed spun yarn was determined by dissolving and removing silk fibroin using the sodium hypochlorite method according to JIS L 1030-1982 Fiber Mixing Ratio Test Method 7.2.16. In addition, in order to examine the washing durability of the processed spun yarn, a part of the knitted jersey knit was washed in a home washing machine in accordance with JIS L 0217 <103> method.
Washed several times. Table 1 shows the results of quantitative analysis of the content of silk fibroin by the sodium hypochlorite method described above after each wash. In the table, polyester is an example of polyester filament yarn that was tested under the same conditions for comparison.

【table】

[Table] Furthermore, in order to confirm the adhesion status of silk fibroin in the spun yarn, microscopic observation was performed and the results are shown in FIG. FIG. 1 is a photograph of the processed yarn observed with a scanning electron microscope. Effects of the Invention The silk fibroin-processed acrylic spun yarn of the present invention has silk fibroin filled in at least a portion of the voids between the fibers of the acrylic spun yarn.
It not only improves the unique linen-like silky feel, waist feel, and firmness, but also shows durability that can withstand repeated washing, and its effects are extremely remarkable.

[Brief explanation of the drawing]

FIG. 1 is a scanning electron micrograph showing a cross section of the silk fibroin processed spun yarn of the present invention.

Claims (1)

[Scope of Claims] 1. A silk fibroin-processed acrylic spun yarn, which is obtained by filling at least a portion of the interfibers of an acrylic spun yarn with silk fibroin. 2. The acrylic spun yarn according to claim 1, wherein at least 30% by weight of the silk fibroin is insoluble in hot water. 3. The acrylic spun yarn according to claim 1, wherein the amount of silk fibroin adhered to the acrylic spun yarn is 1 to 15% by weight.