B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 47/02 (2006.01) B05D 1/00 (2006.01) B05D 1/26 (2006.01) B29C 47/30 (2006.01)
Patent
CA 2505009
A method for coating a substrate (10) includes rotating the substrate (10) about an axis, and applying a polymeric reaction mixture to a surface of the rotating substrate by ejecting the polymeric reaction mixture through a die (100). The die (100) has a branched system of channels for dividing an inlet stream of the polymeric reaction mixture into plural outlet streams. The outlet streams are spaced apart from each other such that the outlet streams flow together seamlessly after application to the substrate. The die (100) and the rotating substrate (10) are moved longitudinally relative to each other. And the material output rate of the mixture and the relative movement of the die (100) are synchronized with the rotational speed of the substrate (10) in such a way that successive convolutions of polymeric reaction mixture overlap and connect together seamlessly.
Cette invention concerne un procédé de revêtement d'un substrat consistant à faire tourner ledit substrat sur un axe et d'appliquer sur la surface de ce substrat en rotation un mélange réactif polymère éjecté au travers d'une matrice. La matrice comporte un système ramifié de canaux qui subdivise le flux d'entrée du mélange réactif polymère en une pluralité de flux de sortie. Ces flux de sortie, qui sont espacés les uns des autres, se rejoignent sans interruption après leur application sur le substrat. La matrice et le substrat tournant se déplacent longitudinalement l'une par rapport à l'autre. Le débit du mélange et le mouvement relatif de la matrice sont synchronisés avec la vitesse de rotation du substrat de telle sorte que les convolutions successives du mélange réactif polymère se chevauchent et se relient sans interruption.
Gajewski Vincent J.
Mallon Charles F.
Peter Thomas H.
Crompton Corporation
Gowling Lafleur Henderson Llp
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