Patent ID: 11933013
Assignee: TENSAR CORPORATION, LLC
Field: Other special machines (Mechanical engineering)
Classification: CPC E  B | IPC B  E

Claim 0:
1. A method of making an integral geogrid, comprising:
providing a coextruded multilayer polymer starting sheet having at least coextruded first, second, and third layers of polymeric materials,
the polymeric material of the first layer and of the third layer having a first molecular weight and each being from 25 to 34 weight % of the starting sheet, and the polymeric material of the second layer having a second molecular weight different from the first molecular weight and being from 32 to 50 weight % of the starting sheet, and the second layer being positioned between the first layer and the third layer;
providing a plurality of holes or depressions of a selected pattern in the coextruded multilayer polymer starting sheet; and
orienting the coextruded multilayer polymer starting sheet having the patterned plurality of holes or depressions therein to provide a plurality of oriented strands interconnected by junctions, and to configure the holes or depressions as grid openings in a space defined by the oriented strands and the junctions.