Highly breathable biodegradable films
US8334327B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2006 |
| Grant date | Dec 18, 2012 |
| Priority date | — |
| Expiry date | Oct 20, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24942
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A breathable film having a base layer comprising first filler particles and second filler particles dispersed within a biodegradable polymer matrix is provided. The first filler particles constitute from about 25 wt. % to about 75 wt. % of the base layer and the second filler particles constitute from about 0.1 wt. % to about 10 wt. % of the base layer. The ratio of the average size of the first filler particles to the average size of the second filler particles being from about 2 to about 100. The film exhibits a water vapor transmission rate of about 2,000 g/m2/24 hours or more and a peak load in the machine direction of about 800 grams-force per inch or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.