Stretchable tear resistant porous elastomeric film elements and processes
US5336554A · kind A · utility
27Cited by
8References
5Claims
0Family size
Inventor
Key dates
| Filing date | May 14, 1993 |
| Grant date | Aug 9, 1994 |
| Priority date | — |
| Expiry date | May 14, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249953
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Process for providing thin elastomeric sheet elements with air-permeability and with improved resistance to tearing as a result of being punctured while in stretched condition. The process comprises exposing the sheet to interrupted, high intensity, narrow laser beams to form a plurality of small, closely-spaced laser perforations, each having smooth walls which resist tearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.