Thermoplastic resin shaped-article, method of manufacturing the same, thermoplastic resin light guide, light source device, and liquid crystal display device
US9920174B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2014 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Dec 16, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2333/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Provided are a thermoplastic resin shaped-article in which vacancies with satisfactory light emission efficiency are formed, and a thermoplastic resin light guide that uses the thermoplastic resin shaped-article.Pulse laser irradiation is performed in a state in which the pulse laser is focused to an inner region of a primary thermoplastic resin shaped-article, thereby forming cracks at the inner side of the primary thermoplastic resin shaped-article. Then, a heat treatment is performed at a temperature equal to or higher than a glass transition temperature of a thermoplastic resin that constitutes the primary thermoplastic resin shaped-article, thereby obtaining a thermoplastic resin shaped-article 20 in which substantially spherical vacancies 244 having minimum diameter of 30 μm or more are formed only at the inner region distant from a surface thereof by 10 μm or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.