Un-sintered polytetrafluoroethylene processed article
US6521697B2 · kind B2 · utility
1Cited by
1References
6Claims
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Key dates
| Filing date | Jan 26, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Apr 24, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3154
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
To provide an un-sintered polytetrafluoroethylene processed article which has an un-sintered polytetrafluoroethylene layer formed by coating and/or impregnating with an aqueous dispersion of PTFE and is characterized in that a content of alkyl phenols detected from the un-sintered PTFE layer is not more than 0.1 ppm. The un-sintered PTFE-processed article scarcely contains alkyl phenols which are suspected as chemical substances having endocrine disrupting activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.