Flat-cross-section glass fiber, glass-fiber-reinforced resin composition, and glass-fiber-reinforced resin molded product
US12195600B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2023 |
| Grant date | Jan 14, 2025 |
| Priority date | — |
| Expiry date | Jan 26, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2377/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A glass fiber including a plurality of flat-cross-section glass filaments each having a cross-section in flat shape, the cross-section having a major axis in the range of 15.0 to 25.0 μm, a minor axis in the range of 8.0 to 12.0 μm, and an irregular shape ratio R, being the ratio of the major axis to the minor axis (major axis/minor axis), in the range of 1.5 to 3.0. The flat-cross-section glass fiber has a packing rate P, being the ratio of the cross-sectional area of each flat-cross-section glass filament to the area of a rectangle circumscribing the cross-section of the flat-cross-section glass filament, in the range of 80.1 to 89.9%, and the irregular shape ratio R and the packing rate P satisfy the following formula (1): 337.6≤P3/2/R≤421.2 . . . (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.