Sheet material

B - Operations – Transporting – 32 – B

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Details

B32B 3/12 (2006.01) B29C 47/00 (2006.01) B29D 24/00 (2006.01)

Patent

CA 2260125

A rigid or semi-rigid plastics sheet material comprises a pair of opposed faces (20, 22) between which run elongate voids defined by interconnections (24, 25) between the two opposite faces, the cross-sectional shape of at least some of the voids being a polygon with more than four sides, preferably a repeating pattern of regular hexagons or octagons joined in a line at adjacent sides or apices and including triangular secondary voids therebetween. Advantages include higher strength, lighter weight and faster cooling during the extrusion process.

Une feuille en plastique rigide ou semi-rigide comporte deux faces opposées (20, 22) entre lesquelles se trouvent des évidements de forme allongée délimités par des interconnexions (24, 25) situées entre les deux faces opposées, la forme dans le plan transversal de quelques évidements au moins étant celle d'un polygone comportant plus de quatre cotés, de préférence, une configuration répétitive d'hexagones ou d'octogones réguliers réunis en une ligne sur des côtés ou des sommets adjacents et incluant entre eux des évidements secondaires triangulaires. Au nombre des avantages de cette réalisation figurent une résistance plus élevée, une plus grande légèreté ainsi qu'une plus grande rapidité de refroidissement durant le processus d'extrusion.

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