Extruded polymer foam process with staged forming

Details Extruded polymer foam process with staged forming Extruded polymer foam process with staged forming

B - Operations, Transporting

29

C

B29C 44/26 (2006.01)

Patent

CA 2750730

Prepare an extruded polymeric foam by extruding a foamable polymer composition through a foaming die and allowing the foamable polymer composition to expand into a polymer foam as it travels through and is constrained in its thickness dimension by at least two constraining sections, the first having opposing essentially parallel forming plates and the second constraining section having forming plates spaced further apart than the first constraining section.

La présente invention concerne la préparation d'une mousse polymère extrudée. La préparation est effectuée en extrudant une composition polymère pouvant se transformer en mousse à travers une matrice de formation de mousse, et en permettant à la composition polymère pouvant se transformer en mousse de s'étendre dans une mousse polymère lorsqu'elle se déplace à travers et est contrainte en épaisseur par au moins deux sections de contrainte, la première comportant des plaques de formage opposées essentiellement parallèles, et la seconde section de contrainte comportant des plaques de formage plus espacées que la première section de contrainte.

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