Apparatus and process for producing polymeric foam

Details Apparatus and process for producing polymeric foam Apparatus and process for producing polymeric foam

B - Operations, Transporting

29

C

B29C 44/46 (2006.01) B01F 5/06 (2006.01) B29C 44/34 (2006.01)

Patent

CA 2226494

An apparatus and process for producing polymeric foam, wherein reactive foam components and a low-boiling point frothing agent are brought together, sufficient pressure is applied to maintain the frothing agent in a liquid state and the mixture is passed through a permeable discharge head through which the mixture is discharged and wherein the pressure is reduced and froth is formed. The discharge head comprises one or more diffuser elements (80) having a structure such as to require division, divergence and convergence of flow paths in three dimensions within the axial thickness of the diffuser element, considered in the direction of flow therethrough. The diffuser element (80) is made of bonded, or sintered or sintered composite material, such as sintered wire.

Dispositif et procédé de fabrication de mousse polymère, consistant à rassembler des constituants réactifs de mousse et un agent d'écumage à point d'ébullition bas, à appliquer une pression suffisante afin de maintenir l'agent d'écumage à l'état liquide et à faire passer le mélange à travers une tête de décharge perméable à travers laquelle le mélange est évacué et dans laquelle la pression est diminuée et de l'écume se forme. La tête de décharge comprend un ou plusieurs éléments de diffusion (80), dont la structure est conçue de façon à permettre la séparation, la divergence et la convergence de trajets d'écoulement en trois dimensions à l'intérieur de l'épaisseur axiale de l'élément de diffusion, vue dans le sens de l'écoulement. Cet élément de diffusion (80) est fabriqué en matériau aggloméré ou fritté, ou en matériau composite fritté, tel que du fil fritté.

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