| US 7,541,084 B2 | ||
| Geotechnical articles | ||
| Izhar Halahmi, Hod Hasharon (Israel); Oded Erez, Tel Aviv (Israel); and Adi Erez, Tel Aviv (Israel) | ||
| Assigned to PRS Mediterranean Ltd., Tel Aviv (Israel) | ||
| Filed on Mar. 01, 2007, as Appl. No. 11/680,979. | ||
| Prior Publication US 2008/0213521 A1, Sep. 04, 2008 | ||
| Int. Cl. B32B 1/00 (2006.01); B32B 3/12 (2006.01); C08L 53/00 (2006.01); C08L 43/00 (2006.01); C08L 27/10 (2006.01); C08L 33/00 (2006.01); C08L 9/00 (2006.01); C08L 39/04 (2006.01); C08L 35/02 (2006.01); C08F 8/00 (2006.01); E02D 3/02 (2006.01); E02D 5/00 (2006.01); E02D 17/00 (2006.01); E02D 29/00 (2006.01) | ||
| U.S. Cl. 428—174 [428/116; 428/117; 428/118; 428/178; 405/284; 525/88; 525/203; 525/209; 525/217; 525/222; 525/232; 525/191; 525/240; 524/500] | 9 Claims |
| 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/cm3 and (ii) an engineering thermoplastic resin selected from the group consisting of polyesters, polyamides, and polyurethanes;
wherein the elastic phase comprises an elastic polymer having a density of at most 0.925 g/cm3; and
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.
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