Container having a foamed wall

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 44/08 (2006.01) B29C 49/06 (2006.01) B29C 49/64 (2006.01) B29D 22/00 (2006.01) B65D 1/02 (2006.01)

Patent

CA 2556432

A process for making a container comprises injection molding a polymer 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 temperature above the polymer softening temperature, and blow molding the preform, to prepare a container consisting essentially of a microcellular foamed polymer having a non-reactive gas contained within the microcellular foam cells.

Cette invention concerne un procédé de fabrication d'un récipient, lequel procédé consiste à mouler par injection une préforme polymère comprenant un gaz non réactif occlus dans les parois de la préforme, à refroidir la préforme à une température inférieure à la température de ramollissement du polymère, à chauffer à nouveau la préforme à une température supérieure à la température de ramollissement du polymère et à mouler par soufflage la préforme, lequel procédé permet de fabriquer un récipient formé essentiellement d'un polymère en mousse microcellulaire comprenant un gaz non réactif occlus dans les cellules de la mousse microcellulaire.

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