Colored extruded foam cross-linked backer rod

摘要

The present invention relates to the forming of extruded foam products such as backer rods which are of a cross-linked polyethylene. Disazo condensation color pigments have been found to be particularly suitable as relative fast cross-linking occurs after extrusion. Use of traditional inorganic color pigments substantially impede the cross-linking mechanism. The invention is also directed to a method of forming such cross-linked products.