JPH07109043B2 - Spun yarn - Google Patents

Description

TECHNICAL FIELD The present invention relates to a spun yarn composed of fibers having an amorphous softening property at a temperature of 90 to 110 ° C. and having a heat adhesive property at the low temperature.

[Prior Art] Conventionally, there is known a fiber whose core part is made of a synthetic fiber component having a high melting point and whose sheath part is made of a synthetic fiber component having a low melting point, and which is formed so as to have a thermal bonding property at a low temperature. .

Conventionally, many proposals have been made in the field of non-woven fabrics, stuffed cotton, etc. as a method of using fibers having thermal adhesiveness at low temperatures, and also for spun yarns, fibers having thermal adhesiveness at low temperatures and a high melting point are used. For example, an invention relating to a cured fabric described in Japanese Patent Application Laid-Open No. 60-139846 is proposed in which a fiber having

However, these conventionally known fibers having thermal adhesiveness at low temperature are composed of a core-sheath type composite fiber, and thus it is difficult to make fine denier of the high melting point component of the core part.
In particular, in the field of spun yarn, it has been a great limitation in developing its application.

That is, in the case of the core-sheath type composite fiber, the single yarn denier is 1.5
The limit for stable yarn production was ˜2 denier, and there was a limit for making fine denier. Further, in view of the adhesive strength as a fiber having heat-adhesive properties and a thread, and the strength of the thread, the core / sheath composite ratio is generally required to be in the range of 30 to 70% / 70 to 30%. The limit of thin denier core is about
It was about 0.5 denier.

Therefore, as with the cured cloth described in JP-A-60-139846, a cloth with a hard texture that can be used for an interlining or the like can be obtained by heat-bonding treatment, but it is generally extremely coarse and hard. It was inevitable that it would feel good.

As a means for avoiding such a rough and hard feeling, there is a method of reducing the use ratio of the core-sheath type composite fiber to the high melting point fiber as much as possible, but in the case of such a method, the adhesive strength is However, there is a problem in that the texture is lowered and the feeling change during use becomes large.

[Problems to be Solved by the Invention] In view of the above points, an object of the present invention is to have a property of easily heat-bonding at a low temperature, have a high heat-bonding strength, and be flexible. It is intended to provide a spun yarn that enables to obtain a good texture.

[Means for Solving Problems] The present invention has the following configuration in order to achieve the above object.

That is, the spun yarn of the present invention is a modified polyester component in which the island portion is composed of a polyester component having a normal melting point, the island portion has two or more islands, and the sea portion has a softening point temperature of 90 ° C. or more and 110 ° C. or less. Sea-island type composite synthetic fiber staple (A), which has a melting point of 140 ° C or higher or a thermal decomposition temperature of 1
The staple fiber (B) having a temperature of 20 ° C. or higher is mixed-spun, and the sea-island type composite fiber (A) is 5% by weight in the spun yarn.
A spun yarn characterized by being mixed-spun in an amount of less than 40% by weight.

[Operation] Hereinafter, the spun yarn of the present invention will be described in more detail.

The spun yarn of the present invention comprises the sea-island type composite fiber staple (A) having two or more island components in the spun yarn in an amount of 5% by weight or more and less than 40% by weight. Is usually a polyester component having a melting point, while the sea component is a modified polyester component having a softening point temperature of 90 ° C. or higher and 110 ° C. or lower.

A normal melting point polyester component has a melting point of 180 ° C or higher 262
A polyester component having a temperature of ℃ or less, and mainly polyethylene terephthalate can be favorably used, but if the melting point is 180 ° C or higher and 262 ° C or lower, a copolymerization component other than terephthalic acid and ethylene glycol is used. It is also possible to use a copolyester having the above. The polyester component having a normal melting point constitutes two or more islands, and by making such a multi island, the flexibility of the fiber (A) inside the mixed spun yarn is improved, and the adhesive strength and the adhesion are improved. Power becomes high. Further, according to the present invention, the fineness of the island component can be made into a fine denier of 0.5 denier or less, and it is possible to obtain a product having a soft texture in spite of strong adhesive strength and adhesive strength. .

The sea component is composed of a modified polyester component having a softening point temperature of 90 ° C. or higher and 110 ° C. or lower. For example, an isophthalic acid copolymer having an amorphous softening property and having a softening point temperature within the above range. Polymerized polyester and the like can be preferably used. By configuring the polymer of the sea component within such a softening point temperature range, it becomes possible to realize thermal bonding at a low temperature which is practically easy to use and has good handleability. It is possible to widen the selection range of the other fiber (B) used as, and to enable the product development of the spun yarn of the present invention to a wide variety of uses, such as for clothing or industrial use.

Here, if the softening point temperature of the sea component of the fiber (A) is lower than 90 ° C., it is unfavorable because it is difficult to set the twist after spun yarn, that is, in the form of tube yarn or cheese. Generally, it is set by twisting at 80 to 90 ° C in moist heat, but adhesion occurs between spun yarns laminated and wound at this time, making it difficult to unwind and difficult to use. Further, if the softening point temperature is 110 ° C. or higher, heat treatment at a high temperature is required to cause adhesion, and in that case, the selection range of the fiber (B) as a blending partner is restricted, and the versatility is increased. It is not desirable because it is lacking. That is, in the case of, for example, wool, the heating limit is generally up to about 120 ° C. from the viewpoint of strength, and a polymer constitution that requires heat treatment at a high temperature should not be used.

The staple fiber (B) mixed with the fiber (A) has a melting point of 140 ° C. or higher or a thermal decomposition point temperature of 1
It is important to use a fiber having a temperature of 20 ° C. or higher, and if the condition is satisfied, the staple fiber (B) is substantially heat-degenerated regardless of whether it is a synthetic fiber, a chemical fiber or a natural fiber. It is possible to cause thermal bonding without being damaged.

The blending ratio of the fiber (A) affects the adhesive strength and texture, and is preferably 5% by weight or more and less than 40% by weight in the spun yarn, more preferably 10% by weight or more and 30% by weight or less. Is a good one. That is, if it is less than 5% by weight, it is difficult to obtain a sufficient thermal adhesive force and unmixed portions may be generated due to mixing unevenness, and if it exceeds 40% by weight, a thermal adhesive yarn product or cloth is obtained. The texture of the product becomes too hard, which generally lowers the commercial value, which is not preferable.

In the spun yarn of the present invention, as a method of mixing the staple fiber (A) and the staple fiber (B) as described above, a uniform dispersion blending, a side-by-side composite blending, or a core-sheath composite blending is used. Either aspect may be used.

The spun yarn of the present invention may be used by itself as the spun yarn alone for a desired purpose, or may be used as a spun yarn or a twisted yarn with an ordinary spun yarn or another yarn depending on the intended use. It is what is done.

[Advantages of the Invention] According to the present invention as described above, it is possible to obtain an adhesive spun yarn or an adhesive cloth which is easily heat-bonded at a low temperature, has a high heat-bonding strength, and is soft and has a good texture. Provided is a spun yarn that enables it.

According to the present invention, it is possible to obtain a thermobonded spun yarn which is far superior to the conventionally known ones in terms of durability of adhesion, easiness of processing, and sense of quality of the obtained product. Is.

By using the spun yarn of the present invention, the specific effects listed below can be obtained, and the application can be expanded to various applications.

That is, A. shirt cloth, sheet cloth, seat cover, pillow cover, etc.
Generally, by appropriately using the yarn of the present invention for a fabric which is hardened by gluing, a hard finishing effect similar to that of gluing can be obtained only by an iron set without gluing.

B. When used for the selvage yarn of a shuttleless loom, the effect of preventing fraying of the selvage can be obtained by pressing and heating only the selvage portion at the weave portion.

C. A heat-bonded spun yarn having no problem in unwinding property can be obtained because it can be subjected to a heat treatment as it is as a wound body of a single yarn or a plied yarn.

This treatment is possible under the anti-twist setting conditions and equipment adopted for ordinary polyester. The heat-bonded spun yarn thus obtained is suitable for summer knits and summer suits, and a product having a cool feeling and a cool feeling can be obtained.

D. By applying it to the inner side of high-grade futon by heat-bonding, it is possible to obtain the effect of crushing the side, which is effective for preventing feathers, wool, silicone treated cotton, etc. Furthermore, it is effective in preventing cotton dust when used on the inner side of cotton duvet.

The same effect can be obtained even when used for a quilted middle side land, the range of side land selection is widened, and a low basis weight side land can be obtained.

E. Hair loss and pile loss can be prevented by using it for the ground yarn of raised and napped products, and for the core yarn or spun yarn of molding yarn.

F. Hats, bra cups, mold pads, baskets, boxes, drainers, artificial flowers, handicrafts, furniture products, electrical products, car products, etc. can be used for three-dimensional molding and quick molding by using the fabric made of the spun yarn of the present invention. Delivery is possible. Furthermore, since it can be easily three-dimensionally molded with an iron, a hair dryer, hot water, etc., it can be handmade and can be used in a variety of applications depending on the taste.

G. The anti-twisting effect can be obtained by using it for pile yarns, and applying a heat-bonding treatment as appropriate after twisting.

H. As a sewing thread, a sewing product having substantially no seams can be obtained by using the sewing thread alone or by plying it with a commonly used sewing thread and subjecting it to a heat-bonding treatment.

[Examples] Next, the structure and effects of the spun yarn of the present invention will be specifically described with reference to Examples.

Example As the fiber (B), a normal melting point (melting point 260 ° C.) homopolyester 2 denier × 51 mm, 85% by weight was used, and as the fiber (A), an isophthalic acid copolymerized polyester having a sea component softening point of 100 ° C. And the melting point is usually 16 islands (melting point 260 ℃)
Using 2% denier of homopolyester of 51 mm and 15% by weight, 30 s (cotton count) of uniformly mixed spun yarn by a raw cotton mixing method and twist count 19 times / inch were obtained.

After winding this spun yarn around 1 kg of cheese, applying a twist stop set by heat treatment at 85 ° C for 20 minutes, the yarn is used for vertical and horizontal weaving, and the vertical yarn weave density is 65 yarns / inch. A cloth for sheets having a weft yarn density of 55 yarns / inch was obtained.

The cloth for sheets thus obtained is washed at home and then ironed (ironing temperature of 160 ° C.) to obtain almost the same texture as when using a wash paste,
Moreover, it was a good product with an excellent refreshing feeling.

Further, by the same method as above, only the blending ratio of the fiber (A) was changed to various conditions of 2%, 5%, 10%, 30%, 45% and 50%, and the other conditions were the same as above. A spun yarn was made under the conditions, and a sheet cloth similar to the above was woven and evaluated.

As a result, the 2% mixed-spun product did not have a wash paste-like touch and a refreshing feeling. In addition, the 5% blended product had a feeling of washing glue-like touch and a refreshing feeling, which was slightly poorer than that of the above-described product of the present invention, but the effect of the present invention was confirmed. Ten%,
With the 30% blended product, the touch and the refreshing feeling similar to those with a wash glue can be sufficiently obtained, but it is recognized that the 15% blended product is superior in terms of overall texture and refreshing feeling. It was Also,
The 45% blended product and 50 blended product are too coarse and hard to touch, and have the same feel as using the above-mentioned laundry paste, and have an excellent coolness and feel that the product value is poor in the field. It was recognized.

From the above results and various findings of the present inventors, in the spun yarn of the present invention, the blending ratio of the fiber (A) is most preferably within the range of about 15 to 25% by weight in the spun yarn. Was recognized.

Continuation of the front page (56) Reference JP-A-60-139846 (JP, A) JP-A-59-228039 (JP, A) JP-A-59-15530 (JP, A) JP-A-60-17140 (JP , A) JP-A-60-181 (JP, A)

Claims (2)

[Claims] 1. A sea-island type in which the island portion comprises a polyester component having a normal melting point, the island portion has two or more islands, and the sea portion comprises a modified polyester component having a softening point temperature of 90 ° C. or more and 110 ° C. or less. Composite synthetic fiber staple (A) of
A staple fiber (B) having a melting point of 140 ° C. or higher or a thermal decomposition temperature of 120 ° C. or higher is mixed-spun, and the sea-island type composite fiber (A) is mixed-spun in a spun yarn in an amount of 5% by weight or more and less than 40% by weight. A spun yarn characterized by: 2. The fibers forming the fiber staple (B) are
The spun yarn according to claim (1), which is a single-component fiber.