High strength porous PTFE sheet material

A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum matrix tensile strength in substantially all directions within the flat plane between 146 and 215.6 megapascals.

A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum secant modulus in substantially all directions within the flat plane between 50 and 537.4 megapascals.

A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum matrix secant modulus in substantially all directions within the flat plane between 224 and 1188 megapascals.

A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum tensile strength in substantially all directions within the flat plane between 32.6 and 97.5 megapascals and a minimum secant modulus between 50 and 537.4 megapascals.

A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum matrix tensile strength in substantially all directions within the flat plane between 146 and 215.6 megapascals and a minimum matrix secant modulus between 224 and 1188 megapascals.