Processes for forming fluoropolymer articles
US11421086B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2019 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Nov 26, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2978
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a process for producing a fluoropolymer article having a high surface roughness and high coarseness which comprises the following steps: The present invention further relates to a fluoropolymer article obtainable by a process according to the invention.The present invention furthermore relates to a fiber comprising, or consisting of, a fluoropolymer having a surface roughness expressed as a peak to valley distance (Rt) greater than 10 micrometer and/or an average surface roughness (Ra) greater than 1.5 micrometer.The present invention furthermore relates to a membrane comprising, or consisting of, a fluoropolymer having a coarseness index ρ/EBP of at least 0.3, an air permeability of 15 ft3/ft2/min or higher and a node aspect ratio of below 25.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.