Patent ID: 6398997
Filing Date: 2002-06-04
Classification: B29C,Y10S

Abstract:
A method for extruding foam of a thermoplastic elastomer, the thermoplastic elastomer including a blend of olefin rubber and polyolefin resin, the method comprising the steps of:mixing a first quantity of the thermoplastic elastomer in pellet form with a second quantity of water and allowing the thermoplastic elastomer to soak for a predetermined period of time after mixing; introducing the mixed water and thermoplastic elastomer to an extruder; melting and compressing the thermoplastic elastomer and mixing with the water within the extruder to a uniform mix of thermoplastic elastomer and water; extruding the mix through a die wherein the water expands in a vapor form to create foam cells with the cells having walls of the thermoplastic elastomer.