Patent ID: 7541084
Filing Date: 2009-06-02
Classification: B29C,B29D,B29K,B29L,C08L,E02D,Y10T

Abstract:
1. A cellular confinement system formed from a plurality of polymeric strips and formed by joining said strips by a plurality of discrete physical joints, the joints being spaced apart from each other by non-joined portions of the polymeric strips, wherein each polymeric strip comprises a multiphase polymeric material which maintains stiffness and creep resistance over a temperature range of minus 70° C. to plus 90° C., the multiphase polymeric material comprising a rigid continuous phase and an elastic phase dispersed in the rigid continuous phase; wherein the rigid continuous phase comprises two separate polymers, (i) a rigid polymer having a density of greater than 0.925 g/cm wherein the elastic phase comprises an elastic polymer having a density of at most 0.925 g/cm wherein the multiphase polymeric material has a 1% secant flexural modulus according to ASTM D790 of from about 600 MPa to about 2200 MPa at 20-25° C.; a creep modulus of from about 400 MPa to about 1000 MPa at 20-25° C., a load of 20% of yield stress, and a loading time of 60 minutes, according to ISO 899-1; a 1% secant flexural modulus according to ASTM D790 of from about 500 MPa to about 2800 MPa at minus 20° C.; a creep modulus of from about 500 MPa to about 1500 MPa at minus 20° C.; a tear strength according to ASTM D1004 of at least 20 N for a film thickness of 1 mm at 20-25° C.; and a tear strength according to ASTM D1004 of at least 10 N for a film thickness of 1 mm at minus 20° C.