Method for manufacturing glass strands and glass yarn

Abstract

The present invention provides a method for manufacturing glass strands that exhibit less breakage when stretched into glass fibers, and a method for manufacturing glass yarn that exhibits less breakage and fuzzing when twisted, and has less variation in quality between the beginning and end of the winding in long lengths of glass yarn. [Solution] A method for manufacturing glass strands, (1) A stretching step in which a filament made of a glass composition containing 90% by mass or more of SiO2 is stretched into glass fibers at a melting temperature of 1,500 to 3,500°C and under conditions of tension of 0.1 to 1.0 cN / strand, (2) A bundling process in which the glass fibers obtained in the stretching process are bundled into 30 to 400 strands to produce glass strands. A method for producing glass strands, characterized by including the following:

Claims

1. A method for manufacturing glass strands, (1) SiO ２ A stretching step is performed in which a filament made of a glass composition containing 90% by mass or more as a composition is stretched into glass fibers at a melting temperature of 1,500 to 3,500°C and under conditions of tension of 0.1 to 1.0 cN / strand, (2) A bundling step in which the glass fibers obtained in the stretching step are bundled into 30 to 400 strands to produce glass strands. A method for producing glass strands, characterized by including the following:

2. The aforementioned glass composition is SiO ２ A method for producing a glass strand according to claim 1, characterized in that quartz glass containing 99% by mass or more of the composition is used.

3. The method for producing a glass strand according to claim 1, characterized in that the method for melting the filament made of the glass composition is a method selected from a burner flame, laser light, and an electric furnace.

4. The method for producing a glass strand according to claim 3, characterized in that the fuel gas for the burner flame is a mixture of hydrogen, oxygen, and nitrogen, wherein the mixing ratio of the mixture is hydrogen:oxygen = 1:1 to 3:1, and the mixing ratio of nitrogen to oxygen is 1 or less.

5. The method for manufacturing a glass strand according to claim 3, characterized in that the laser source for the laser light is selected from carbon dioxide-based, YAG-based, Nd / glass, Nd / vanadate, diode, fiber, disk, HeCd, copper vapor laser, iodine laser, argon laser, krypton laser, and chemical laser.

6. The method for manufacturing a glass strand according to claim 3, characterized in that the material of the heating element of the electric furnace is selected from platinum, molybdenum, tantalum, tungsten, molybdenum disilicide, lanthanum chromium grade, and carbon graphite.

7. A method for manufacturing glass yarn, characterized by including a twisting step in which a glass strand manufactured by the method described in any one of claims 1 to 6 is twisted 0.1 to 5 times per 25 mm.

8. The method for manufacturing glass yarn according to claim 7, comprising a winding step of winding the glass yarn obtained in the twisting step onto a bobbin, characterized in that the length of the glass yarn is 100 km or more.

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