B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 70/44 (2006.01)
Patent
CA 2537950
A vacuum bag (23) forming a vacuum envelope over polymeric materials being formed against a mold, has a fabric (55) (55) reinforced with flexible reinforcement fibers to withstand multiple mold cycles, and a chemically non-reactive and non-adhering material forming a release surface (60) separating the fabric (55) from a polymeric material being formed against a mold. The vacuum bag has a network of veins (79) or nubs (61) to distribute the flow of polymeric material.
L'invention concerne une poche (23) à vide formant une enveloppe à vide sur des matériaux polymériques formés contre un moule, constituée d'un tissu (55) renforcé par des fibres de renforcement flexibles pour résister à de multiples cycles de moulage, et d'un matériau chimiquement non réactif et non adhérent formant une surface (60) de libération séparant le tissu (55) d'un matériau polymérique formé contre un moule. La poche à vide comprend un réseau de nervures (79) ou de lignes (61) servant à distribuer le flux de matériau polymérique.
Caron Mark C.
Certainteed Corporation
Moffat & Co.
Saint-Gobain Technical Fabrics Canada Ltd.
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