Multilayer films with quiet film layer having noise dampening properties
US6620474B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2002 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Sep 20, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Multilayer films comprising a quiet film layer having noise dampening properties and at least one second layer which are particularly useful for, ostomy bags (colostomy, ileostomy), trans-dermal delivery systems (TDDS), cosmetic patches, incontinence bags, medical collection bags, parenteral solution bags, and food packaging, as well as for protective clothing and soil fumigation applications. The quiet layer comprises a polymer resin or polymer resin composition having a Tangent Delta value of at least 0.25 at a temperature within the range of −5° C. and 15° C. or at least 0.32 at a temperature within the range of −12° C. to −5° C., and the at least one second layer has a storage modulus G′ equal to or greater than 2×104 N/cm2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.