Long glass fiber manufacturing method, and long glass fiber
US12110249B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 2022 |
| Grant date | Oct 8, 2024 |
| Priority date | — |
| Expiry date | Oct 4, 2042 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for manufacturing glass long fiber using recovered glass fiber, capable of manufacturing glass long fiber in which a recycle rate is increased, increase of a liquid phase temperature of molten glass and narrowing of an operating temperature range of the molten glass are suppressed, and a spinning temperature is low. The method includes a glass melting step of melting a glass raw material containing glass fiber recovered from a glass fiber-reinforced resin molded product, and a glass fiber mineral material to obtain molten glass; and a spinning step of spinning the molten glass to obtain glass long fiber, and a content of the recovered glass fiber in the glass raw material is in the range of 11 to 75% by mass, and differences in the contents of SiO2, Al2O3, B2O3, and CaO between the glass fiber mineral material and the recovered glass fiber satisfy a prescribed relationship.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.