Patent ID: 8021503
Filing Date: 2011-09-20
Classification: B32B,B60R,D04H,Y10T

Abstract:
1. A method of producing an automobile interior material or construction sheet with excellent processability, the method comprising: carding short fibers which are a mixture of polypropylene fibers and polyethylene fibers in a mixing ratio of 3 to 7:7 to 3, on one side or both sides of a foamed layer produced by foaming chips selected from the group consisting of polypropylene chips, polyethylene chips, polyurethane chips, and expanded polystyrene chips; setting the short fibers with a shape of a truss in the foamed layer through a needle punching process that includes needle punching diagonally in opposite directions, thereby making a short fiber layer(s); and thermally setting the portions of the short fibers exposed on the outside of the foamed layer at 120 to 250° C., by pressing, melting, cooling and hardening fused portions of the short fibers.