Process for producing modified molded article, molded article, diaphragm, and diaphragm valve
US11072672B2 · kind B2 · utility
1Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2017 |
| Grant date | Jul 27, 2021 |
| Priority date | — |
| Expiry date | Nov 22, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L21/67017
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention provides a process for producing a modified molded article capable of providing a diaphragm that is less likely to generate particles. The process for producing a modified molded article includes: molding modified polytetrafluoroethylene containing a tetrafluoroethylene unit and a modifying monomer unit based on a modifying monomer copolymerizable with tetrafluoroethylene to provide a molded article; and irradiating the molded article with not lower than 30 kGy but lower than 70 kGy of radiation at 270° C. to 310° C. to provide a modified molded article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.