Fins and profiles for plastic bags
US6713152B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2001 |
| Grant date | Mar 30, 2004 |
| Priority date | — |
| Expiry date | Sep 7, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2839
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A fastener for a plastic bag comprising a male track including a male profile and an optional first fin extending from the male profile and a female track including a female profile and an optional second fin extending from the female profile. At least one of the first and second fins and/or one of the male and female profiles comprises a cyclic olefin copolymer or a combination of a cyclic olefin copolymer and one or more additional polymers. The cyclic olefin copolymer has a glass transition temperature, Tg, of greater than about 20° C. as determined by ASTM D3418. The cyclic olefin copolymer may comprise from about 10 to about 90 mol. % norbornene. The additional polymer is selected from a polyolefinic resin, an engineering resin, and a combination thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.