Flat-cross-section glass fiber and method for manufacturing flat-cross-section glass fiber using glass raw material comprising glass recycled material

By controlling the coefficient of variation in the length of the short diameter of the flat cross-section glass fiber and the ratio of the long diameter to the short diameter, and combining the glass recycled materials and mineral materials, the problem of low productivity of the flat cross-section glass fiber in the prior art is solved, and efficient continuous production and excellent reinforcement of resin molded products are achieved.

CN119698397APending Publication Date: 2025-03-25NITTO BOSEKI CO LTD
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Patent Information

Application Number
CN202280099076.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2022-08-18
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

The prior art is difficult to improve the continuous productivity and mass production adaptability of resin molded products with flat cross-section glass fibers while maintaining the reinforcement of the resin molded products, especially when using glass recycled materials as raw materials, the productivity is low due to the presence of foreign matter.

Method used

By controlling the coefficient of variation of the length of the short diameter of the flat cross-section glass filaments in the range of 8.0 to 26.1%, the length of the short diameter of the glass fiber is ensured to be in the range of 3.5 to 10.5 μm, and the ratio of the long diameter to the short diameter is in the range of 1.5 to 9.0, glass recycled materials and mineral materials are used as glass raw materials, and the continuous productivity and mass production adaptability of the glass fiber are improved through clustering technology.

Benefits of technology

The excellent continuous productivity and mass production adaptability of flat cross-section glass fibers are achieved, while maintaining the high strength of resin molded products, which is specifically manifested as the bending strength of the injection molded products reaches more than 200MPa and the warpage is less than 10mm.

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Abstract

Provided are: a flat-cross-section glass fiber which has excellent continuous productivity and mass production adaptability, and which is capable of achieving excellent resin molded article reinforcement; and a method for producing a flat-cross-section glass fiber using a glass raw material comprising a glass recycled material. In this flat-cross-section glass fiber, a flat-cross-section glass filament constituting the flat-cross-section glass fiber has a flat cross-sectional shape having a major diameter of a predetermined range of length and a minor diameter of a predetermined range of length, and the coefficient of variation of the minor diameter length is in the range of 8.0-26.1%.
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