Method and apparatus for producing closed cell foam

Details Method and apparatus for producing closed cell foam Method and apparatus for producing closed cell foam

C - Chemistry, Metallurgy

08

J

C08J 9/12 (2006.01) B01F 5/06 (2006.01) B29B 7/38 (2006.01) B29B 7/74 (2006.01)

Patent

CA 2197891

Methods and apparatus for producing high quality closed cell foams for use in applications such as coatings, sealant beads, seam filling and gaskets. In a first embodiment an in-line single pass static mixing device (10) containing a very large number of individual mixing elements (12) is used to homogeneously disperse a gas throughout a highly viscous liquid polymeric material such as a plastisol, silicone, butyl or urethane based material. In a second embodiment both a dynamic mixer (3a) and a single pass static mixer (3b) are used in series to form the closed cell foam.

L'invention se rapporte à des procédés et à un appareil de production de mousses cellulaires de haute qualité utilisées dans des applications telles que des revêtements, des moulures d'étanchéité, le remplissage de jointures et les garnitures d'étanchéité. Dans un premier mode de réalisation, un dispositif de mélange statique (10) à passage unique en ligne contenant un très grand nombre d'éléments de mélange individuels (12) est utilisé pour disperser de manière homogène un gaz dans un matériau polymère liquide visqueux tel qu'un matériau à base de plastisol, silicone, butyle ou uréthane. Dans un second mode de réalisation, un mélangeur dynamique (3a) et un mélangeur statique à passage unique (3b) sont utilisés en série pour produire la mousse cellulaire.

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