Plastics material mesh structure

Details Plastics material mesh structure Plastics material mesh structure

B - Operations, Transporting

29

D

18/1002, 61/48,

B29D 28/00 (2006.01)

Patent

CA 1201565

ABSTRACT OF THE DISCLOSURE In order to produce an intermediate structure which has high strength in the direction of orientated strands with continuous orientated material extending from one end of the structure to the other, and in order to pro- duce a final structure which has good tear strength and impact strength at each junction, plastics material mesh structures are made by providing a starting material having a pattern of primary holes or depressions and smaller secondary holes or depressions between the primary holes or depressions, and stretching the plastics material to orien- tate the zones between adjacent holes or depressions to form orientated strands. A first stretch in a single direction produces intermediate structures having first mesh openings and smaller second mesh openings. A subsequent stretch at right angles to the first stretch produces the structures having main orientated strands interconnected by shorter orientated strands arranged in such a way that only three strands meet at any junction.

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