Patent ID: 6383424
Filing Date: 2002-05-07
Classification: B01D,B29C,B29K

Abstract:
A method for manufacturing foam from a polymer or a polymer mixture, comprising:melting the polymer or the polymer mixture in an extruding device of a first part of a process line under a first pressure; enriching the melted polymer or the melted polymer mixture with a gas at a gas pressure in the first part of the process line while influencing the melted polymer or the melted polymer mixture with at least one shearing, mixing, or kneading device, wherein the gas pressure is higher than the first pressure; and forming the foam from the gas enriched melted polymer or melted polymer mixture at the end of a second part of the process line following the first part while the gas enriched polymer or polymer mixture at the end of the second part of the process line has a second pressure that is higher than the first pressure.