Multilayer polymeric film
US5006394A · kind A · utility
474Cited by
37References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1988 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Jun 23, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A polymeric multilayer film structure having a high percentage of fillers is disclosed. The fillers are concentrated in a separate filler containing layer having about 5 to about 20 percent of the thickness of the total multilayer film. The filler containing layer is coextruded with a base layer comprising the balance of the thickness of the multilayer film. By keeping the filler containing layer thin, relative to the total film thickness, a multilayer film having a filler concentration up to about 60 weight percent is achievable without significantly adversely affecting the material properties of the multilayer film structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.