Manufacture of extruded products

Details Manufacture of extruded products Manufacture of extruded products

B - Operations, Transporting

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C

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B29C 47/00 (2006.01) B29C 47/04 (2006.01) C08F 291/00 (2006.01) C08J 3/24 (2006.01) C08J 5/00 (2006.01) C08J 7/16 (2006.01)

Patent

CA 2018878

ABSTRACT Manufacture of Extruded Products Polymeric material is plastified in an extruder and is then divided into a major part and a minor part. Either the major part or (more often) the minor part is modified by a chemical reaction, such as grafting (any necessary ingredients being added, if not already present). The major and minor parts are then recombined in an extrusion head so that the modified and unmodified materials form distinct parts of the product. In this way, a single extruder can be used to make, for instance, a product with surface characteristics modified by grafting, wire-covering with only a surface layer crosslinked, or heat-sealable crosslinked packaging film.

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