Patent ID: 6670404
Filing Date: 2003-12-30
Classification: B02C,B07B,B29B,B29C,B29K,B29L,C08G,C08J,C08L,Y02W

Abstract:
A method of preparing foam powder from polymeric foam, the method comprising:a) comminuting the foam in a crusher comprising at least two surfaces moving at different speeds, said comminuting comprising contacting at least a portion of the foam to said at least two surfaces, thereby preparing a crushed product comprising particles; b) quenching the crushed product exiting the crusher with a cooling medium, wherein a mass flow rate of the cooling medium has a value that is at least a certain percentage of a mass flow rate of the crushed product, wherein said value is at least a minimum value suitable for dilute phase pneumatic conveying of the crushed product and c) separating said particles from the crushed product, wherein substantially all of the crushed product exiting the crusher is scraped off said at least two surfaces of said crusher prior to separating said particles from the crushed product.