초록 ▼

A method of maintaining proper distance between railroad rails is disclosed. The method utilizes railroad ties manufactured from a composite of polystyrene and polyolefin components, preferably obtained from recycled plastics. The composite exhibits a dual phase morphology wherein the two phases, po

A method of maintaining proper distance between railroad rails is disclosed. The method utilizes railroad ties manufactured from a composite of polystyrene and polyolefin components, preferably obtained from recycled plastics. The composite exhibits a dual phase morphology wherein the two phases, polystyrene and polyolefin, intertwine and remain continuous throughout the material.

대표청구항 ▼

[ We claim:] [1.] In a method of maintaining spacing between railroad rails by attachment of said rails to at least one railroad tie, the improvement wherein:said at least one railroad tie is formed from a plastic composite material comprising 20-50 wt % of a polystyrene component forming a first ph

[ We claim:] [1.] In a method of maintaining spacing between railroad rails by attachment of said rails to at least one railroad tie, the improvement wherein:said at least one railroad tie is formed from a plastic composite material comprising 20-50 wt % of a polystyrene component forming a first phase and 50-80 wt % of a polyolefin component forming a second phase,wherein said polystyrene component contains at least 90 wt % polystyrene and said polyolefin component contains at least 75 wt % high density polyethylene, andwherein said first phase and said second phase each form three dimensional networks that are integrated with one another within said composite material.