POROUS POLYURETHANE SHEET

摘要

A porous polyurethane sheet includes a urethane polyol prepolymer having an easy storing and handling characteristic. The urethane polyol prepolymer is in a semi-solid state or a solid state at room temperature, and includes a urethane functional group on the main chain thereof along with at least two hydroxyl functional groups. The urethane polyol prepolymer is heated to melt, and an isocyanate compound containing an isocyanate functional group for reacting with the hydroxyl functional group, and a urethane curing catalyst are added and stirred at high speed to form mechanically foamed material. Thus formed mechanically foamed material is cooled to room temperature with or without pressure applied to form a porous polyurethane sheet. Thus formed porous polyurethane has good physical and chemical properties.