Patent · US Active

Barrier laminates

US11345129B2 · kind B2 · utility

0Cited by

4References

17Claims

0Family size

Assignees

Covestro LLC · US
Covestro Deutschland AG · DE

Inventors

Dirk Schultze · Bad Fallingbostel, DE
Lionel Stebbins · Granby, US
Andre Kleinheider · Cologne, DE
Helge Kosthorst · Visselhövede, DE

Key dates

Filing date	Oct 21, 2019
Grant date	May 31, 2022
Priority date	—
Expiry date	Feb 26, 2040

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB32B2307/7265
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The present invention provides a barrier film comprising a first layer formed from thermoplastic polyurethane (TPU) and a second layer formed from a thermoplastic polymer-based coupling agent containing an ethylene-vinyl acetate (EVA) copolymer and a second polar co-monomer polymer, wherein the barrier film has a total thickness of between 50 μm (2 mil) and 600 μm (24 mil), wherein the first layer has a thickness of between 20 μm (0.8 mil) and 400 μm (16 mil), and wherein the second layer has a thickness of between 20 μm (0.8 mil) and 200 μm (8 mil). The inventive barrier film may find use in colostomy, urostomy, and ileostomy pouches and in other medical applications.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.