Process for varying the appearance of a container having a...

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 49/64 (2006.01) B29C 49/06 (2006.01) B29C 49/08 (2006.01) B29D 22/00 (2006.01) B29D 24/00 (2006.01)

Patent

CA 2744387

A process for varying the appearance of a container is disclosed, the process comprises injection molding a poly-mer preform having a non-reactive gas entrapped within the walls thereof, cooling the preform to a temperature below the polymer softening temperature, reheating the preform to a predetermined temperature greater than the polymer softening temperature, and blow molding the reheated preform, to prepare a container consisting essentially of a micro cellular foamed polymer having a non--reactive gas contained within the micro cellular foam cells, wherein the appearance of the container is varied based on the prede-termined temperature.

L'invention porte sur un procédé pour faire varier l'aspect d'un contenant, le procédé comprenant le moulage par injection d'une préforme de polymère ayant un gaz non réactif piégé à l'intérieur des parois de celle-ci, le refroidissement de la préforme à une température inférieure à la température de ramollissement du polymère, le réchauffage de la préforme à une température prédéterminée supérieure à la température de ramollissement du polymère, et le moulage soufflage de la préforme réchauffée, de façon à préparer un contenant essentiellement constitué d'un polymère mousse microcellulaire ayant un gaz non réactif contenu à l'intérieur des cellules de mousse microcellulaires, l'aspect du contenant variant en fonction de la température prédéterminée.

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