JPH01321937A - Chenille yarn for thermoforming - Google Patents

Abstract

PURPOSE:To obtain a chenille yarn for thermoforming, consisting of a fancy yarn and core yarn, fibers in the fancy yarn having a higher softening temperature than that of fibers in the core yarn and capable of providing fabrics thermoformable into a desired shape without impairing appearance and feeling. CONSTITUTION:A chenille yarn for thermoforming obtained by spinning floral yarns (preferably natural fibers, such as cotton) having >=10 deg.C, preferably >=30 deg.C higher softening temperature than that of fibers in core yarns (preferably synthetic fiber, such as polyolefin fiber) and core yarn. If a fabric consisting of the above-mentioned chenille yarns is thermoformed at a temperature below the softening temperature of the fibers in the fancy yarn and above the softening temperature of the fibers in the core yarn, only the core yarn is softened and thermoformed. Thereby, splendid massive feeling and appearance of the fabric will not be impaired.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a thermoformable fabric that does not lose its texture, appearance, etc. even after thermoforming a fabric using molle yarn. Regarding mole yarn.

[Problems to be solved by conventional technology/inventions] In recent years, so-called thermoforming processing, in which fabric is heated to soften the fibers and then deformed, has been used to save labor and improve the beauty of molded products. It has been implemented.

Molded products manufactured in this way are used in a wide range of applications, including the lining of cases such as musical instruments, the manufacture of interior products such as upholstery, the interior of vehicles such as automobiles, and even miscellaneous goods such as hats. There is.

Fabrics made using mole yarn are heavy and luxurious in terms of appearance and texture, but when this fabric is thermoformed, the filaments are also deformed by heat, resulting in a luxurious appearance. This causes problems such as not only the texture being damaged but also the texture becoming hard.

[Means for Solving the Problems] As a result of intensive research by the present inventors in order to solve this problem, the problem was solved by the fact that both the core thread and the filament soften when heated.
We came to the conclusion that even the filaments are deformed as they are vacuum- or press-formed, damaging not only the appearance but also the texture and reducing the product value. The inventors have discovered that the above problem can be solved by creating a combination that is difficult to soften, and have completed the present invention.

That is, the present invention relates to a thermoforming yarn for thermoforming, which is composed of fibers whose softening temperature is 10° C. or more higher than the softening temperature of the core fibers.

[Example] The fibers that become the filaments of the mole yarn of the present invention have a softening temperature higher than that of the fibers that become the core yarn by 10° C. or more, preferably by 20° C. or more, and more preferably by 30° C. or more. The softening temperature of the filament fiber is 1 higher than the softening temperature of the core fiber.
Because the temperature is higher than 0℃, even after thermoforming the heavy and luxurious fabric obtained using this mall yarn, there is almost no deformation of the filament fibers, giving it a heavy and luxurious appearance. This allows the core yarn to be thermoformed into the desired shape while maintaining its texture and texture. If the difference in the softening temperatures is less than 10°C, the effects described above cannot be sufficiently achieved.

The softening temperature referred to in this specification refers to a softening temperature measuring device that is generally used to measure the softening temperature of fibers (a fiber softening degree measuring device manufactured by Toyo Seiki ■), a load of 5 mg/denier, a sample of 3000 denier. , a sample length of 30 mm, and a heating rate of 3° C./min), and the softening start temperature (tangential method) was determined. However, if the softening start temperature cannot be measured because the tangent line of the softening curve is unclear, the 10% shrinkage temperature of the fiber can be determined, and if the 10% shrinkage temperature cannot be measured, the maximum shrinkage temperature can be determined and compared. All you have to do is

Preferred specific examples of the fibers that become the filaments include natural fibers such as cotton, hemp, wool, and silk, some recycled fibers such as rayon, and fibers that generally do not have a softening temperature, such as inorganic fibers. Among synthetic fibers, examples include, but are not limited to, polyester fibers, polyamide fibers, vinylon fibers, etc., which have a relatively high softening temperature (for example, about 180°C or higher in the tangential method).
Fibers with a relatively low softening temperature, such as polyolefin fibers and polyclar fibers, can also be used as long as they have a softening temperature 10° C. or more higher than the softening temperature of the core fiber.

Preferred specific examples of the fibers serving as the core yarn include synthetic fibers that have a relatively low softening temperature (for example, about 150°C or less when measured by the tangential method), such as polyolefin fibers, acrylic fibers, polyvinyl chloride fibers, and vinyl chloride fibers. Examples include, but are not limited to, fibers such as polychlorinated fibers, polyclar fibers, etc.
Even fibers with a relatively high softening temperature, such as acrylic fibers and polyamide fibers, can be used as long as they have a softening temperature lower than .degree. C. or more.

Specific examples of the combination of the filament fibers and core yarn fibers include cotton, which is a natural fiber that generally does not have a softening temperature;
When wool, silk, etc. are used as filaments and synthetic fibers with a softening temperature are used as core threads, polyester fibers,
Using polyamide fibers, acrylic fibers, etc. as filaments,
Examples include cases where acrylic fibers, acrylic fibers, vinyl chloride fibers, polyclar fibers, etc. are used as the core yarn.

In the case of the former combination, cotton and acrylic fiber, cotton and polyclar fiber, cotton and acrylic fiber, wool and acrylic fiber, wool and polyester fiber, wool and polyamide fiber,
Combinations such as silk and acrylic fibers are preferred from the viewpoint of softening temperature difference, etc. In the case of the latter combination, polyester fibers and acrylic fibers, polyester fibers and acrylic fibers, polyester fibers and polyclar fibers, polyester fibers and chlorinated Vinyl fibers, polyester fibers and polypropylene fibers, polyamide fibers and acrylic fibers, polyamide fibers and acrylic fibers, polyamide fibers and polyclar fibers, combinations of polyamide fibers and polypropylene fibers, acrylic fibers and acrylic fibers, acrylic fibers and A combination of vinyl chloride fibers is also preferred from the viewpoint of softening temperature difference.

The thermoforming molding yarn of the present invention has no difference in appearance from general molding yarn, and is made of single fibers having a fineness of about 1.5 to 5 denier, for example, with a count of 10 to 40 (cotton count). A filament of spun yarn or filament yarn of approximately 1.5 to 5 denier, and a core yarn of spun yarn or filament yarn of approximately 20 to 40 count (cotton count) consisting of a single fiber having a fineness of, for example, approximately 1.5 to 5 denier. A common example is one that is spun using a conventional maul yarn manufacturing method. During the spinning, heat-fusible fibers may be used as a part of the core yarn, as is commonly used, in order to prevent the filaments from coming off. The yarn count of the mole yarn obtained in this way is generally about 2.0 to 5.0 (meter count) as a combination of filament yarn and core yarn. It has a wide range of applications.

When these thermoforming molding yarns are made into fabrics,
Usually, ordinary spun yarn or filament yarn is used for the warp, and mole yarn is often used for the weft, but sometimes mole yarn is used for the warp.

When a general spun yarn or filament yarn is used as the warp yarn, it is preferable that the yarn is made of the same material as the core yarn of the molle yarn.

Fabrics made from yarns of different materials may not produce good results when thermoformed.

The preferred conditions for thermoforming a fabric using the molle yarn of the present invention are a temperature that is about the softening point of the core yarn fibers (the softening point determined by the tangent method), and a temperature that is higher than the softening point of the filament fibers. It is also preferable to thermoform at a temperature lower than about 10°C. By thermoforming under these conditions, molding and
A molded article of good shape can be changed without impairing the texture or appearance of a fabric using a part of the yarn.

Hereinafter, the mole yarn of the present invention will be explained with reference to Examples, but the present invention is not limited thereto.

Example 1 2 denier polyester fiber (manufactured by Kijin ■, softening temperature 2
The filament is a single yarn of 30 count (cotton count) spun at 20℃), and 1.5 denier acrylic fiber (Kanebuchi Chemical Co., Ltd.)
Heat-fusible fiber (elder, filament yarn manufactured by Toshi ■) is spun into a 30-count (cotton count) single yarn spun from Kanekalon (softening temperature: 130°C) made by Toshi Co., Ltd., with a softening temperature of 130°C.
% (weight %, hereinafter the same) is used as a core yarn to spin a mole yarn.3.
I got the 7th (meter) maul yarn.

Next, use the same acrylic fiber count 30 (cotton count) as the core thread.
A fabric for thermoforming was produced by using the twin yarns as warp yarns at a warp density of 50 yarns/inch and inserting the above-mentioned mole yarn as weft yarns at a density of 25 yarns/inch.

In order to thermoform the obtained fabric, it was heated for 40 seconds in an atmosphere at 150° C., and immediately molded using a press molding machine.

The obtained molded product was completely satisfactory, with almost no difference in appearance or texture from before thermoforming.

Comparative Example 1 Thermoforming was carried out in the same manner as in Example 1, except that a 30 count (cotton count) single yarn spun from the same acrylic fiber as the core yarn was used instead of the filament of the mole yarn in Example 1. A fabric was made and thermoformed under the same conditions as in Example 1, but the filaments in the molded yarn part of the molded product were thermally deformed, and the appearance and texture were significantly different from before thermoforming, resulting in a decrease in commercial value. It was low.

Example 2 A 20 count (fine count) single yarn was prepared by using 30 count (cotton count) single yarn as the filament and spinning 2 denier acrylic fiber (manufactured by Asahi Kasei Corporation, softening temperature 180°C) as the core yarn. A 2.6 count (meter count) molle yarn was obtained using the yarn.

Next, a 30 count (fine count) double yarn of the same acrylic fiber as the core yarn is used as the warp yarn, and the warp density is 50 yarns/inch, and the above-mentioned mall yarn is inserted as the weft yarn at a density of 20 yarns/inch. Fabric was manufactured.

The obtained fabric was heated for 60 seconds in an atmosphere of 180° C. for thermoforming, and immediately molded using a press molding machine.

The obtained molded product was completely satisfactory, with almost no difference in appearance or texture from before thermoforming.

Example 3 A 10 count (fine count) single yarn spun from 2 denier polyester fiber (manufactured by Teijin ■, softening temperature 220°C) was used as the filament, and a 2 denier polyclar fiber (manufactured by Kojin ■) was used as the core thread. Using a 20 count (fine count) single yarn spun with a softening temperature of 170°C, a 1.8 count (meter count) malle.
I got yarn.

Next, a 20 count (fine count) twin yarn of polyclar fiber, the same as the core yarn, is used as the warp yarn to give a warp density of 40 yarns/inch, and 15 yarns/inch are inserted into this as the weft yarn to create a fabric for thermoforming. was manufactured.

The obtained fabric was heated for 40 seconds in an atmosphere of 180° C. in order to thermoform it, and immediately molded using a press molding machine.

The resulting molded product had a high commercial value, with almost no difference in appearance or texture from before thermoforming.

Example 4 Nylon filament yarn of 200 denier (100 filaments of 2 denier) (manufactured by Toshi), softening temperature 2
2 denier vinyl chloride fiber (synthetic fiber made of a copolymer of 70% vinyl chloride and 30% acrylonitrile, softening temperature 110°C) was spun as a core yarn using
A 2.6 count (metric count) mole yarn was obtained using a single yarn with a count of 0 (fine count).

-11 Next, double-threaded vinyl chloride fiber with the same 20 count (fine count) as the core yarn is used as the warp, and the warp density is 40 yarns/inch, and molle yarn is used as the weft and 20 yarns/inch. A fabric for casting and thermoforming was produced.

In order to thermoform the resulting fabric, a vinyl chloride film (hard, 0.2 m thick) was heated in an atmosphere of 130°C for 40 seconds.
m5 Kanevinyl (manufactured by Kanebuchi Kagaku Kogyo ■) and heated, and immediately molded using a vacuum forming machine.

The molded yarn part of the molded product obtained had a high commercial value, with almost no change in appearance or texture from before thermoforming.

Comparative Example 2 The procedure was the same as in Example 4 except that a 20 count (fine count) single yarn of the same vinyl chloride fiber as the core yarn in Example 4 was used instead of the filament of the mole yarn in Example 4. When a fabric was made and thermoformed, the appearance of the filaments in the molded product was completely damaged and its commercial value was low.

[Effects of the Invention] A fabric using the molle yarn of the present invention provides a molded article whose texture, appearance, etc. are not impaired even when subjected to thermoforming.

Claims (1)

[Scope of Claims] 1. A mole yarn for thermoforming, which is composed of fibers whose softening temperature is 10° C. or more higher than the softening temperature of the fibers of the core yarn. 2. The thermoforming molding yarn according to claim 1, wherein the filaments are made of natural fibers and the core yarns are made of synthetic fibers. 3. The thermoforming material according to claim 1, wherein the filament consists of at least one of polyester fiber, polyamide fiber, and acrylic fiber, and the core yarn consists of at least one of acrylic fiber, acrylic fiber, vinyl chloride fiber, and polyclar fiber. Mole yarn.