Plastic sheets for thermoforming dental products

Details Plastic sheets for thermoforming dental products Plastic sheets for thermoforming dental products

A - Human Necessities

61

C

A61C 7/08 (2006.01) A61C 9/00 (2006.01) A61C 13/00 (2006.01) A61C 13/01 (2006.01) A63B 71/08 (2006.01) B29C 51/02 (2006.01) B29C 51/10 (2006.01)

Patent

CA 2598171

A sheet (10, 20) for use in a model vacuum thermoforming process, wherein the sheet (10, 20) has a thickened area (11) that may be in a preselected three- dimensional form such as arch-shape (12). The thickened area (11) or three- dimensional area (12) is placed over an area of the model (21) where the plastic sheet is to be stretched during the thermoforming process. This ensures a uniform or a preselected thickness in the stretched areas than would otherwise occur.

La présente invention concerne une feuille (10, 20) destinée à être utilisée dans un processus de thermoformage sous vide de modèle, ladite feuille (10, 20) comportant une zone épaissie (11) qui peut se présenter sous forme tridimensionnelle telle qu'une forme cintrée (12). La zone épaissie (11) ou la zone tridimensionnelle (12) est placée au-dessus d'une zone du modèle (21) où la feuille de plastique doit être étirée pendant le processus de thermoformage. Ceci assure une épaisseur uniforme ou une épaisseur présélectionnée dans les zones étirées.

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