Low hygroexpansivity paper sheet
US8486226B1 · kind B1 · utility
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20Claims
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Key dates
| Filing date | Sep 12, 2012 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Sep 12, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/27
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A paper sheet is providing having a basis weight of 50 to 80 g/m2, and having a top surface and a bottom surface, said paper sheet comprising 10%-80% by weight of hardwood kraft pulp; and 10%-70% by weight of sulfite pulp; wherein the paper sheet has an MD/CD TSI ratio of 1.25 to 2.15, and a fiber hygroexpansion stress transfer parameter (ω) of less than 0.1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.