Breathable, heat-sealable composite polymeric film
US8936852B2 · kind B2 · utility
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51Claims
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Key dates
| Filing date | Mar 18, 2013 |
| Grant date | Jan 20, 2015 |
| Priority date | — |
| Expiry date | Mar 18, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31797
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A breathable, heat-sealable composite film comprising first and second layers of polymeric material wherein (i) the polymeric material of the first layer comprises copolyester comprising monomeric units derived from one or more diol(s); one or more dicarboxylic acid(s); and one or more poly(alkylene oxide)glycol(s); and (ii) the second layer is a heat-sealable polymeric layer, and a process for the production thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.