Process for extruding low density foam using water blowing...

Details Process for extruding low density foam using water blowing... Process for extruding low density foam using water blowing...

B - Operations, Transporting

29

C

B29C 44/20 (2006.01) B29C 44/34 (2006.01) B29C 47/00 (2006.01) C08J 9/12 (2006.01)

Patent

CA 2102227

In a process for extruding a low density foam, a foamable thermoplastic elastomer such as a thermoplastic rubber is select- ed. The selected thermoplastic elastomer is then fed into a heated extruder barrel where it is compressed and melted by the action of a screw. A blowing agent consisting of water is introduced into the melted thermoplastic elastomer. The melted thermoplastic elastomer and the water are thoroughly mixed and then cooled to a uniform, predetermined temperature. The mixture is then forced through a die to form an extruded foam profile.

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