×

Method for extruding plastic with accent color pattern

  • US 5,387,381 A
  • Filed: 05/01/1991
  • Issued: 02/07/1995
  • Est. Priority Date: 12/07/1989
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of producing a plastic extrudate with a base color and at least one accent color, comprising the steps of:

  • a) introducing into an extruder a base color producing material and an accent color producing material, said base color producing material comprising powder sized material, said accent color producing material comprising pellets which (i) are larger than the powder sized material of said base color material, (ii) have a higher deflection temperature than said base color material; and

    (iii) wherein said base color producing material comprises polyvinylchloride and wherein said accent color producing material comprises a material selected from the group consisting of acrylics, polycarbonates and mixtures thereof;

    b) extruding said base color producing material and said accent color producing material through an extrusion die to form the plastic extrudate under processing temperatures whereby the accent color carrying pellets cause delayed introduction and restricted dispersion of the accent color into the plastic extrudate;

    c) introducing into said extrusion die a substrate producing material, and co-extruding said substrate producing material with said base color producing material and said accent color producing material.

View all claims
  • 24 Assignments
Timeline View
Assignment View
    ×
    ×