KR100205907B1 - Spun yarn with excellent heat resistance - Google Patents

Abstract

The present invention relates to a spun yarn having excellent heat resistance, characterized in that a blend of metal fiber staples and aramid fiber staples in a certain ratio is formed as the outer layer of the yarn, and an inorganic fiber filament is formed on the inner layer of the yarn. It can be used in the industrial or glass industry or in the friction material industry where heat resistance and strength are required.

Description

Spun yarn with excellent heat resistance

The present invention relates to a spun yarn having excellent heat resistance, and more particularly, to the production of a spun yarn having excellent heat resistance, strength and stability to human body by staple and filament yarn of two kinds of fiber materials. Conventionally, asbestos fabrics mainly used asbestos yarns have been used as heat-resistant materials in these industrial fields, but legal regulations are gradually intensified as the harmfulness of asbestos is known to the human body.

Therefore, a lot of research and development is in progress to replace asbestos, and a lot of substitute materials are also coming out. In general, metal fibers and the like have been proposed as alternative materials for such asbestos, but due to its rigidity, metal fibers are difficult to be commercialized as fiber materials such as staples, joints, or weaving. In order to improve this, we have used a combination of woven metal fabric and other textile materials, but when we approach the fire source, other parts of the fiber other than the metal fiber ignite and become carbonized or vulnerable. A problem has occurred. Therefore, the present invention is to make a blended surface by combining a variety of fiber materials having the characteristics that can improve the above problems, using a fabric made by blended yarns such as to ensure the stability and performance for the human body required in the field of use In view of the fact that it can be made, a spun yarn blended with wholly aromatic polyamide fibers (hereinafter, aramid fibers) having excellent heat resistance, strength, and stability was prepared. Hereinafter, the present invention will be described in detail. The present invention relates to a spun yarn having excellent heat resistance, characterized by blending a metal fiber staple and an aramid fiber staple at a predetermined ratio as an outer layer of a yarn of yarn and forming an inorganic fiber filament in an inner layer of a yarn of yarn. Hereinafter, the present invention will be described in more detail. The present invention is a mixed yarn composed of a multicomponent manufactured by using a friction spinning machine using a staple of metal fibers and aramid fibers as an outer layer, and a filament yarn of inorganic fiberglass or carbon fibers as an inner layer. Metallic fibers used herein are ceramic fibers or stainless steel fibers, and aramid fibers are meta-based or para-based fibers of wholly aromatic polyamides. The length of the staples is 40-150 mm for metal fibers and 30-65 mm for aramid fibers. Outside of this length, bagability becomes poor, especially metal fibers. Because of its rigidity, the shorter the length, the lower the binding strength with aramid staples when blending. In addition, the staple mixing ratio of the metal fiber and the aramid fiber is composed of 65 to 85% by weight of the metal fiber and 15 to 35% by weight of the aramid fiber. In this case, the spinning property may be poor. The staples of metal fibers and aramid fibers mixed in such a length and proportion are spun into a mixed surface according to a conventional manufacturing method. The blended cotton thus prepared is fed into a friction spinning machine such as an filament yarn of an inorganic fiber filament, ie, glass fiber or carbon fiber, so that the blended surface is composed of an outer layer and the filament yarn is composed of an inner layer. The friction spinning machine uses a product made by Fercher, and the reason why the inorganic fiber filament yarn is put in the inner layer is to pursue the strength and form stability of the product. Glass fiber or carbon fiber is a fiber material which has heat resistance and high elastic modulus. Because it is. In addition, the reason why the blended surface is the outer layer is to impart the feel and dyeing of the fabric. The thickness of the blended yarn thus produced may be prepared according to the use of the product. In addition, when the blended yarn is made of twisted yarn or single yarn and manufactured by a tissue design according to the use, a fabric having excellent heat resistance can be obtained. The spun yarn having excellent heat resistance according to the present invention may be used in the steel industry, glass industry or the friction material industry where heat resistance and strength are required, which are operated at high temperatures. Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited by Examples.

Example 1

The ceramic fiber was stapled to 50 mm in length, the aramid fiber was stapled to 35 mm in length, and the mixed weight ratio thereof was 80:20 to make a blended surface, and the blended yarn was put in a friction spinning machine like filament yarn of carbon fiber. In addition, the blended yarns were woven into plain weave to make a fabric, and the heat resistance of the blended yarn and the fabric was measured and shown in Table 1.

Example 2

The mixing weight ratio of the ceramic fibers and the aramid fibers was 65:35, and the process was performed in the same manner as in Example 1.

Example 3

The length of the ceramic fiber was 145 mm, the length of the aramid fiber was 60 mm, and the process was carried out in the same manner as in Example 1.

Comparative Example 1

A spun yarn was made by mixing a ceramic fiber having a length of 50 mm and a polyester fiber having a length of 38 mm at a mixing weight ratio of 80:20, and the spun yarn was woven into plain weave.

[Production example]

The sliver blended with metal fiber and aramid fiber is supplied from one side, and the inorganic fiber filament is supplied to the other side, and the inorganic fiber filament is formed into a core, and the metal fiber and aramid fiber are formed into the outer layer with a sheath. The yarn was manufactured using a friction spinning machine.

-Heat resistance (1): Fiber surface state after mixed yarn is left for 30 seconds at 5cm distance from fire source

-Heat resistance (2): The tensile strength of the yarn after leaving the mixed yarn for 30 minutes at 400 ° C to 1000 ° C at 200 ° C in units of g / d

-Heat resistance (3): Tensile strength after leaving the fabric for 30 minutes at 400 ° C to 1000 ° C at 200 ° C

Claims (4)

A spun yarn having excellent heat resistance, characterized by blending metal fiber staples and aramid fiber staples at a constant ratio as the outer layer of the yarn and forming an inorganic fiber filament in the inner layer of the yarn. The spun yarn having excellent heat resistance according to claim 1, wherein the mixing ratio of the metal fibers and the aramid fibers at the time of blending is 65 to 85% for the metal fibers and 15 to 35% for the aramid fibers. The spun yarn of claim 1, wherein the metal fiber is a ceramic fiber or a stainless steel fiber and is a staple having a length of 40 to 150 mm, and the aramid fiber is a staple having a length of 30 to 65 mm. The spun yarn having excellent heat resistance according to claim 1, wherein the inorganic fiber is filament yarn of glass fiber or carbon fiber.