Products fluoropolymers (eg, polytetrafluoroethylene) expanded controlled porosity and manufacture.

摘要

A method for forming porous items WITH A VARIABLE pore distribution by extruding PLACEMENT WITH A VARIABLE lubricant distribution. INDIVIDUAL POLYMER polytetrafluoroethylene extruded and then stretched and sintered to provide a structure PTFE POROUS FIBER COMPOSITE DIFFERENTIAL and nodes connected to each other these fibers. THE STRUCTURE HAS A PART microfibrous within Section diagonal HAS A DIFFERENT PORE SIZE, ACCOMPANIED BY A DIFFERENT NODE AND GEOMETRY Fibrous ADJACENT AREAS WITHIN THE CROSS SECTION. SE forms a tube (10) having nodes (12) elongated fibrils (14), an inner (16) surface and an outer surface (18) of a material of a fluoropolymer POROUS DILATED, which is useful as vascular graft . IN A VASCULAR GRAFT, Pores INSIDE inching toward providing a wall structure LUMEN fluid impervious prevents spills, and also PROMOCIONA ELCRECIMIENTO CELL AND TISSUE GENERATION NATURAL. A DISHES gusset structure provides flexibility radially oriented, SUTURA FORTRESS, AND INCREASED PROTECTION AGAINST COLLAPSE.