JPH04228636A - Production of bulky yarn and bulky yarn produced thereby - Google Patents

Abstract

PURPOSE:To obtain a bulky yarn having excellent heat-resistance and heat- insulation by collecting an inorganic fiber and a specific soft addition fiber and subjecting to bulking treatment. CONSTITUTION:Inorganic fibers (silica fiber, alumina fiber, zirconia fiber or titania fiber) and addition fibers (glass fiber, organic fiber, metallic fiber or carbon fiber) are collected together by blending, etc., and subjected to bulking treatment. The openability can be improved by the blending of the addition fibers to get a bulky yarn having soft texture, high tensile strength and excellent weaving behavior.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bulky yarn manufacturing method and a bulky yarn.

0002

[Prior Art] A fiber bundle made of fibers such as glass fibers or organic fibers is fed to a bulking device including a tubular passage, and high-pressure gas is jetted into the tubular passage or the outlet of the passage. It is known that the pressure of this gas can be used to open and bulk a fiber bundle into individual fibers.

0003

[Problems to be Solved by the Invention] Conventional bulky yarns do not have sufficient heat resistance, and when fibers with high heat resistance such as silica fibers are used as fibers constituting fiber bundles,
These fiber bundles have poor opening properties, and in order to fully open the fiber bundles, it is necessary to use high-pressure gas, and when high-pressure gas is used, these fibers are brittle and may be damaged during opening. Since the fibers are easily shredded and scattered, it is difficult to fully open the fibers and it is difficult to obtain a bulky yarn with sufficient heat resistance. An object of the present invention is to provide a bulky yarn with good heat resistance and heat insulation properties, and a method for producing the same.

0004

[Means for Solving the Problem] In order to achieve the above object, the present invention provides inorganic fibers selected from the group consisting of silica fibers, alumina fibers, zirconia fibers, and titania fibers, glass fibers, organic fibers, and metal fibers. A bulky yarn is produced by bulking a bundle consisting of additive fibers selected from the group consisting of carbon fibers and carbon fibers. Next, the present invention will be explained in more detail. In the present invention, one or more inorganic fibers selected from the group consisting of silica fibers, alumina fibers, zirconia fibers and titania fibers (hereinafter referred to as main fibers) and glass fibers, organic fibers, metal fibers and carbon fibers are selected from the group consisting of glass fibers, organic fibers, metal fibers and carbon fibers. A bundle made of added fibers (hereinafter referred to as added fibers), preferably a composite fiber made by blending the main fibers and added fibers, is bulked. The fibers can be produced by drawing a melt of silica, alumina, zirconia or titania through small holes.

Additive fibers have better spreadability than main fibers, and by mixing additive fibers with main fibers, the spreadability can be improved. In addition, the additive fibers are more flexible than the main fibers and will not be shredded or scattered during opening. Even if the main fibers are shredded during opening, the additive fibers will wrap around the main fibers and the main fibers will remain intact. Prevent from scattering. Furthermore, since the added fibers are not shredded by opening, the bulky yarn of the present invention is more flexible, has greater tensile strength, and has better weavability than bulky yarns made only of the main fibers at room temperature. . Furthermore, when a bulky yarn (hereinafter referred to as composite bulky yarn) made by opening a composite fiber bundle consisting of main fibers and additive fibers is exposed to high temperatures, the additive fibers melt or decompose. Since the main fibers are held in a predetermined position by the material, the heat resistance will not be significantly reduced even if additive fibers with low heat resistance are mixed.

[0006] As the main fiber, it is appropriate to use one having a thickness of 3 to 30 μm, preferably 5 to 25 μm. If this thickness is too small, it will be difficult to form into fibers. Furthermore, if the thickness is too large, the fibers will not form a loop when bulking, but will be cut and scattered, making bulking difficult. It is preferable to use one that has a weakly won power such as epoxy resin as a combination agent to be used when combining this fiber, and the amount of the collective agent is 0.1 ~ to 0.1 ~. 10wt%, preferably 0.2
It is appropriate to set it to 0.05 wt%. In addition, the number of bundled fibers is 50 to 20,000, preferably 200 to 1.
It is practical to set the number to 0,000.

[0007] As the additive fiber, one having a thickness of 3 to 30 μm, preferably 5 to 25 μm is suitable, and it is particularly preferable to use glass fiber. Further, the amount of added fiber is suitably 5 to 90 wt%, preferably 10 to 80 wt% of the main fiber. If this amount is too small, the spreadability will not be improved sufficiently, and if this amount is too large, the heat resistance will tend to decrease. There are no particular limitations on the bulking method and device used in the present invention, and conventional devices can be used. As such a bulking device, a conventional bulking device having a tubular passage and a high-pressure gas supply hole for spouting high-pressure gas to the tubular passage or the outlet of the passage is used, and the fiber bundle is passed through the tubular passage. High-pressure gas is ejected into this tubular passage by continuous feeding, and the pressure of this gas allows the fiber bundle to be opened and bulked into individual fibers.

[0008]

[Action] Inorganic fibers selected from the group consisting of silica fibers, alumina fibers, zirconia fibers, and titania fibers;
Preferably, by mixing additive fibers selected from the group consisting of glass fibers, organic fibers, metal fibers, and carbon fibers into the silica fibers, the spreadability of the resulting bulky yarn is improved without reducing the heat resistance. . The bulky yarn of the present invention can be used as a heat-resistant cloth, a filter bag, a heat insulating cloth, a catalyst carrier, a packing material, etc. used in the bending process of sheet glass.

[0009]

[Example] 13μ silica fiber 20 manufactured by melting method
A bundle containing 0 glass fibers and 800 glass fibers with a thickness of 6μ (3.0wt solid content of epoxy resin as a binding agent)
% added and converged) to a tubular passage with a diameter of 1 mm, and the fiber bundle is opened by blowing out high-pressure air of 3.5 kg/cm2 G into the tubular passage,
I got bulky yarn. This bulky yarn has high strength at room temperature and can be used for long periods of time at temperatures of 800°C.

0010

[Effects of the Invention] A bulky yarn can be obtained that is easy to make bulky, has high strength at room temperature, and has excellent heat resistance.

Claims (2)

[Claims] Claim 1: A bundle consisting of inorganic fibers selected from the group consisting of silica fibers, alumina fibers, zirconia fibers, and titania fibers and additive fibers selected from the group consisting of glass fibers, organic fibers, metal fibers, and carbon fibers. A method for producing bulky yarn, which is characterized by bulkyizing an object. 2. A bulky material comprising an inorganic fiber selected from the group consisting of silica fiber, alumina fiber, zirconia fiber, and titania fiber and an additive fiber selected from the group consisting of glass fiber, organic fiber, metal fiber, and carbon fiber. Yarn.