Surface treatment for blanket of thermoplastic fibers

B - Operations – Transporting – 29 – C

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Details

B29C 43/22 (2006.01) D04H 1/54 (2006.01) D04H 3/14 (2006.01) D04H 13/00 (2006.01) E04B 1/80 (2006.01) E04B 1/86 (2006.01) E04B 1/90 (2006.01)

Patent

CA 2528334

An apparatus and method are provided for forming a densified surface layer (104) on a thermoplastic blanket (100). The apparatus (10) includes first and second continuous belts (12, 14), a treatment zone (16) defined between those belts, first and second heating and densifying units (18, 20) and a cooler (50) downstream from the heating and densifying units. The method includes the steps of continuously forming a densified surface layer on a face of a thermoplastic blanket and making the thermoplastic blanket with the densified surface layer to a desired thickness within strict dimensional tolerances. A densified thermoplastic blanket product is also disclosed.

La présente invention a trait à un appareil et un procédé pour la formation d'une couche superficielle densifiée (104) sur un matelas thermoplastique (100). L'appareil (10) comporte des première et deuxième courroies continues (12, 14), une zone de traitement (16) définie entre lesdites courroies, des première et deuxième unités de chauffage et de densification (18, 20) et un refroidisseur (50) en aval des unités de chauffage et de densification. Le procédé comprend les étapes suivantes : la formation en continu d'une couche superficielle densifiée sur la face d'un matelas thermoplastique et la fabrication d'un matelas thermoplastique avec une surface densifiée à une épaisseur souhaitée dans une plage de tolérances dimensionnelles strictes. L'invention a également trait à un matelas thermoplastique densifié.

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