Medical devices containing melt-blown non-wovens of poly-4-hydroxybutyrate and copolymers thereof
US8287909B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2008 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Dec 23, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/608
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Continuous processing methods for making absorbable polymeric non-wovens with one or more of the following properties: high burst strength, fine fibers of average diameter from 1 μm to 50 μm, and thickness from 10 μm to 50 mm, have been developed. Improved fiber cohesion is made possible by allowing the fibers of the non-woven to initially remain molten during web collection. In the preferred embodiment, the polymer is a polyhydroxyalkanoate, and in the most preferred embodiment, the polymer comprises 4-hydroxybutyrate. A particularly preferred embodiment is a non-woven of poly-4-hydroxybutyrate or copolymer thereof, wherein the non-woven has a burst strength greater than 0.1 Kgf, wherein the non-woven is derived by a continuous melt-blown process. The non-wovens can be used for a variety of purposes including fabrication of medical devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.