Structurally durable, drapeable breathable barrier film compositions and articles
US6497691B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2001 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Aug 24, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2437/00
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A thermoplastic film, and the articles thereof, consisting essentially of vinyl copolymer which exhibits sufficient structural durability and enhanced drapeability suitable for application as a breathable barrier layer in disposable end-use articles such as disposable hygiene and protective medical/industrial products. A preferred form of the vinyl copolymer are those selected from the ethylenic acrylates, with ethylene methyl acrylate being most preferred. Melt additives can be compounded with the ethylene methyl acrylate prior to extrusion include colorants, softening agents, UV stabilizers, and surface energy modifiers such as anti-static, hydrophobic and hydrophilic compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.