Self-venting polymeric film
US8586159B2 · kind B2 · utility
1Cited by
22References
86Claims
0Family size
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Key dates
| Filing date | Jul 16, 2004 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Dec 21, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A breathable, heat-sealable, composite film comprising a perforated polymeric substrate layer having a first and second surface and disposed on a surface of the substrate layer an unperforated barrier layer wherein: (i) the thickness of the unperforated barrier layer is no more than about 12 pm; and (ii) the perforated substrate layer has a degree of perforation of from about 0.1 to about 78%, wherein the perforations have an average diameter of between 0.05 and 1.5 mm; and a process for the production thereof, suitable for use in the packaging of freshly cut plants such as flowers, vegetables, fruits and salads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.