Abs/acrylic lamination process

B - Operations – Transporting – 29 – C

Patent

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B29C 47/06 (2006.01) B29C 43/30 (2006.01) B29C 51/00 (2006.01) B29C 51/14 (2006.01) B32B 27/30 (2006.01)

Patent

CA 2066415

Continuous lamination of ABS and polymethyl-methacrylate (PMMA) is achieved employing a continuous sheet or reel of PMMA 0.1 inch to 0.250 inch thick optionally preheated on one side; a web of ABS is extruded at about 450-550°F from pellets onto the PMMA at the nip of a roll stack. In the roll stack, the two laminated layers are compressed and gradually cooled. The laminate displays properties of both ABS and acrylic. It has excellent thermoforming properties.

Stratification continue d'acrylonitrile-butadiène-styrène (ABS) et de polyméthylméthacrylate (PMMA) obtenue par l'emploi d'une feuille ou d'un film continu(e) PMMA (6) possédant une épaisseur de 0,1 pouce à 0,250 pouce, éventuellement préchauffé(e) sur un côté; une bande (3) d'ABS est extrudée à environ 450-500 F à partir de pastilles sur le PMMA (6) au niveau de la ligne de contact (5) d'un ensemble de rouleaux (4). Dans l'ensemble de rouleaux (4), les deux couches stratifiées sont comprimées et progressivement refroidies. Le stratifié présente à la fois les propriétés de l'ABS et de l'acrylique. Il possède d'excellentes propriétés de thermoformage.

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