D - Textiles – Paper – 04 – C
Patent
D - Textiles, Paper
04
C
18/1002, 87/9
D04C 1/00 (2006.01) B29D 28/00 (2006.01)
Patent
CA 1146320
ABSTRACT OF THE DISCLOSURE A diamond pattern of holes or depressions is formed in a plastics material sheet. The holes are in rows across the sheet, the holes of adjacent rows being staggered. The distance apart of adjacent holes in a row is at least 1.5 times the distance apart of adjacent, aligned holes in the direction at right angles to the rows. The sheet is then stretched in a stretch direction at right angles to the rows. The zones be- tween adjacent holes in a diagonal sense form orientated strands and the zones between adjacent holes in each row form junctions which have their lateral zones orientated but a central zone which is unorientated or less orientated. The new structure so formed is useful because there is a continuous line of orien- tation running through the structure generally in the stretch direction, making the structure less liable to tear under shock loads.
337179
Marks & Clerk
P.l.g. Research Limited
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