Delivery system of strippable extrusion coated films for medical applications
US4854995A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1987 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Sep 9, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2556/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention provides a process for producing a wound dressing delivery system. The wound dressing delivery system is formed by extruding first and second thermoplastic resins onto the surface of a carrier sheet to form first and second thermoplastic films; the first thermoplastic film functions as a temporary support for the second thermoplastic film and the second thermoplastic film functions as a wound dressing and has a moisture vapor transmission rate of greater than 300 grams/square meter/24 hours (ASTM E-96:37.8.degree. C./90% R.H.). The first thermpolastic resin is extruded onto the surface of the carrier sheet and the second thermoplastic resin is extruded onto the surface of the first thermoplastic film such that the first thermoplastic film is interposed between the carrier sheet and the second thermoplastic film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.