Composite self-cohered web materials
View Patent ↗The present invention is directed to implantable bioabsorbable non-woven self-cohered web materials having a high degree of porosity. The web materials are very supple and soft, while exhibiting proportionally increased mechanical strength in one or more directions. The web materials often possess a high degree of loft. The web materials can be formed into a variety of shapes and forms suitable for use as implantable medical devices or components thereof.
1. An implantable article comprising melt-formed continuous filaments intermingled to form a porous web wherein said filaments are self-cohered to each other at multiple contact points, wherein said filaments comprise at least one semi-crystalline polymeric component covalently bonded to or blended with at least one amorphous polymeric component, wherein the filaments possess partial to full polymeric component phase immiscibility when in a crystalline state, wherein said implantable article has a percent porosity greater than ninety in the absence of additional components; and a non-bioabsorbable polymeric material attached to said porous web.
2. The implantable article of claim 1 wherein the percent porosity is greater than ninety-one in the absence of additional components.
3. The implantable article of claim 1 wherein the at least one semi-crystalline polymeric component is covalently bonded to at least one amorphous polymeric component.
4. The implantable article of claim 3 wherein the components comprise a block copolymer.
5. The implantable article of claim 1 wherein the at least one semi-crystalline polymeric component is blended with the at least one amorphous polymeric component.
6. The implantable article of claim 5 wherein at least one of the components is a block co-polymer.
7. The implantable article of claim 1 wherein at least one semi-crystalline polymeric component has a melting point greater than eighty degrees centigrade (80° C.).
8. The implantable article of claim 1 wherein said article is adapted for placement in an oral cavity of a mammal.
9. The implantable article of claim 1 wherein said non-bioabsorbable polymeric material is a fluoropolymer.
10. The implantable article of claim 9 wherein said fluoropolymer is polytetrafluoroethylene.
11. An implantable article comprising melt-formed continuous filaments intermingled to form a porous web wherein said filaments are self-cohered to each other at multiple contact points, wherein said filaments comprise a first semi-crystalline polymeric component covalently bonded to or blended with at least one additional semi-crystalline polymeric component, wherein the filaments possess partial to full polymeric component phase immiscibility when in a crystalline state, wherein said implantable article has a percent porosity greater than ninety in the absence of additional components; and a non-bioabsorbable polymeric material attached to said porous web.
12. The implantable article of claim 11 wherein the percent porosity is greater than ninety-one in the absence of additional components.
13. The implantable article of claim 11 wherein the at least one semi-crystalline polymeric component is covalently bonded to at least one amorphous polymeric component.
14. The implantable article of claim 13 wherein the components comprise a block copolymer.
15. The implantable article of claim 11 wherein the at least one semi-crystalline polymeric component is blended with the at least one amorphous polymeric component.
16. The implantable article of claim 15 wherein at least one of the components is a block co-polymer.
17. The implantable article of claim 11 wherein at least one semi-crystalline polymeric component has a melting point greater than eighty degrees centigrade (80° C.).
18. The implantable article of claim 11 wherein said article is adapted for placement in an oral cavity of a mammal.
19. The implantable article of claim 11 wherein said non-bioabsorbable polymeric material is a fluoropolymer.
20. The implantable article of claim 19 wherein the fluoropolymer is polytetrafluoroethylene.
21. An implantable article comprising melt-formed continuous filaments intermingled to form a porous web wherein said filaments are self-cohered to each other at multiple contact points, wherein said filaments comprise at least one semi-crystalline polymeric component covalently bonded to or blended with at least one amorphous polymeric component, wherein the filaments possess partial to full polymeric component phase immiscibility when in a crystalline state, wherein said implantable article has a percent porosity greater than ninety in the absence of additional components, and a porous expanded polytetrafluoroethylene material attached to said porous web.
22. The implantable article of claim 21 wherein the percent porosity is greater than ninety-one in the absence of additional components.
23. The implantable article of claim 21 wherein the at least one semi-crystalline polymeric component is covalently bonded to at least one amorphous polymeric component.
24. The implantable article of claim 23 wherein the components comprise a block copolymer.
25. The implantable article of claim 21 wherein the at least one semi-crystalline polymeric component is blended with the at least one amorphous polymeric component.
26. The implantable article of claim 25 wherein at least one of the components is a block co-polymer.
27. The implantable article of claim 21 wherein at least one semi-crystalline polymeric component has a melting point greater than eighty degrees centigrade (80° C.).
28. An implantable article comprising melt-formed continuous filaments intermingled to form a porous web wherein said filaments are self-cohered to each other at multiple contact points, wherein said filaments comprise a first semi-crystalline polymeric component covalently bonded to or blended with at least one additional semi-crystalline polymeric component, wherein the filaments possess partial to full polymeric component phase immiscibility when in a crystalline state, wherein said implantable article has a percent porosity greater than ninety in the absence of additional components, and a porous expanded polytetrafluoroethylene material attached to said porous web.
29. The implantable article of claim 28 wherein the percent porosity is greater than ninety-one in the absence of additional components.
30. The implantable article of claim 28 wherein the at least one semi-crystalline polymeric component is covalently bonded to at least one amorphous polymeric component.
31. The implantable article of claim 30 wherein the components comprise a block copolymer.
32. The implantable article of claim 28 wherein the at least one semi-crystalline polymeric component is blended with the at least one amorphous polymeric component.
33. The implantable article of claim 32 wherein at least one of the components is a block co-polymer.
34. The implantable article of claim 28 wherein at least one semi-crystalline polymeric component has a melting point greater than eighty degrees centigrade (80° C.).