Patent ID: 6046118
Filing Date: 2000-04-04
Classification: B32B,B41M,H04N,Y10T

Abstract:
A breathable composite sheet material comprising:a first layer of a flash-spun polyethylene plexifilamentary film-fibril sheet material having a basis weight of less than 110 g/m.sup.2, an Elmendorf tear strength of at least 12 Newtons, and a tensile strength of at least 8.75 N/cm;a second layer of a thermoplastic open mesh fabric having a basis weight of less than 60 g/m.sup.2, an elongation of less than about 30%, an Elmendorf tear strength of at least 2.5 N, and a tensile strength of at least 20 N/cm, said second layer being thermally laminated to said first layer;said composite sheet having an average tensile strength that is at least 10% greater than the sum of the tensile strength of the first and second layers, and having a tensile strength, as measured in both machine and cross directions, that is greater than the sum of the tensile strengths of the first and second layers, andsaid composite sheet having average grab tensile strength that is at least 10% greater than the sum of the grab tensile strength of the first and, second layers, and having a grab tensile strength, as measured in both machine and cross directions, that is greater than the sum of the grab tensile strengths of the first and second layers.