Process for forming porous three dimensional expanded polytetrafluoroethylene articles
US12036729B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Jun 29, 2021 |
| Grant date | Jul 16, 2024 |
| Priority date | — |
| Expiry date | Sep 11, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7532
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An additive manufacturing process is provided to produce integral 3-dimensional (3D) articles by laminating together a plurality of expanded polytetrafluoroethylene (ePTFE) membranes. The process includes repetitive cycles of ePTFE membrane lamination paired with laser cutting/bonding to produce a desired geometry based on a predefined pattern. The process may be practiced manually or may be configured to work with commercially available LOM machines/systems developed for use with other roll-to-roll processible materials, such as paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.