Patent ID: 8252216
Filing Date: 2012-08-28
Classification: B29C,B29K,B29L,C08K,C08L,E01B

Abstract:
1. A method for manufacturing a railway tie having a first portion fabricated of a first composition and a second portion fabricated of a second, different composition, said first composition comprising 15% to 75% by weight of a first asphaltic component and from 85% to 25% of a first polymeric composition and said second composition comprising from 20% to 85% by weight of a second asphaltic component and from 80% to 15% by weight of a second polymeric component, each of said first and second polymeric component comprising a mixture of a recyclable plastic and a strengthening agent, comprising the steps of: (i) separately preparing and blending selected amounts of asphalt and plastic to produce a first blend having said first composition and a second blend having said second composition; (ii) separately melting and processing said first blend and said second blend in processors operable to heat and feed said blends separately as composite asphalt plastic composition to pump means associated with a co-extrusion die; and