Anisotropic wound dressing
US4727868A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1987 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | May 20, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2300/00
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An anisotropic wound dressing comprised of a knitted reinforcing fabric which is sandwiched between a crosslinked aliphatic polyurethane. The wound dressing is fabricated by dipping the fabric into a polyurethane-forming coating solution to form a thin film which coates the fibres of the fabric and fills the interstices with a film or layer. The film which coats the fabric is cured by ultraviolet radiation and one side of the film is coated with pressure sensitive adhesive to form a wound dressing. In the most preferred embodiments, the knitted reinforcing fabric is an anisotropic fabric formed with a basic stitch construction to create equally spaced and sized hexagonal interstices. Because of the fabric reinforcement, the resulting oxygen permeable product can be made thin, and yet be anisotropic and strong. The resulting product does not wrinkle easily and holds its shape so it is also easily applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.