Hand tearable sheets and method for manufacturing same
US10427365B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2015 |
| Grant date | Oct 1, 2019 |
| Priority date | — |
| Expiry date | Dec 23, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/12
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A principal film comprising a first polymeric component wherein the principal film has: (1) first and second major faces; (2) a land portion wherein the principal film is capable of thermally-induced self-forming; and (3) one or more modification zones, each comprising a central portion and a rim portion surrounding the central portion and being surrounded by land portion, wherein the average thickness of each rim portion is greater than the average thickness of the land portion surrounding the modification zone, the average thickness of each central portion is less than the average thickness of the land portion surrounding the modification zone and is greater than zero. Also methods for making such films and articles comprising such films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.