Paper/film composite structure and making method
US6946204B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Jan 8, 2004 |
| Grant date | Sep 20, 2005 |
| Priority date | — |
| Expiry date | Jan 28, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31993
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In a paper/film composite structure, the film is made of a low substituted cellulose ether having a molar degree of substitution with alkyl and/or hydroxyalkyl groups in the range of 0.05 to 1.3. The paper/film composite structure can be delivered to the waste paper recycling process without previously removing the film portion. The strength of film is increased without adding to the manufacturing cost. The paper/film composite structure is inexpensive and eliminates the risk of film rupture during the working, transporting and use stages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.