Composite self-cohered web materials
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, and wherein said implantable article is adapted to wrap around a surgical anastomosis.
2 . The implantable article of claim 1 wherein said article has a percent porosity greater than ninety in the absence of additional components.
3 . The implantable article of claim 1 wherein the percent porosity is greater than ninety-one in the absence of additional components.
4 . 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.
5 . The implantable article of claim 4 wherein the components comprise a block copolymer.
6 . 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.
7 . The implantable article of claim 6 wherein at least one of the components is a block co-polymer.
8 . 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.).
9 . 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, and wherein said implantable article is adapted to wrap around a surgical anastomosis
10 . The implantable article of claim 9 wherein said implantable article has a percent porosity greater than ninety in the absence of additional components.
11 . The implantable article of claim 9 wherein said implantable article has a percent porosity greater than ninety-one in the absence of additional components.
12 . The implantable article of claim 9 wherein the at least one semi-crystalline polymeric component is covalently bonded to at least one amorphous polymeric component.
13 . The implantable article of claim 12 wherein the components comprise a block copolymer.
14 . The implantable article of claim 9 wherein the at least one semi-crystalline polymeric component is blended with the at least one amorphous polymeric component.
15 . The implantable article of claim 14 wherein at least one of the components is a block co-polymer.
16 . The implantable article of claim 9 wherein at least one semi-crystalline polymeric component has a melting point greater than eighty degrees centigrade (80° C.).