INTEGRAL POLYETHYLENE TEREPHTHALATE GRIDS, THE METHOD OF MANUFACTURE, AND USES THEREOF

摘要

An integral polymer grid with a plurality of interconnected, oriented pol yethylene terephthalate strands and an array of openings therein is made fro m a polyethylene terephthalate sheet-like starting material having holes or depressions therein that form the openings when the sheet-like material is u niaxially or biaxially stretched. The grid has a higher tensile strength to weight ratio and a higher creep reduced strength to weight ratio than corres ponding ratios associated with a grid made from a non-polyethylene terephtha late starting material.