Explanation

Extension molding is a method of heating and plasticizing thermoplastic plastics to extrusion, shear, extend and stretch the melt through the gap between two or more opposite rotating rollers to form a continuous sheet product with a certain size, and finally to form a film or sheet with a specified size after cooling. It is also possible to composition the flood extension sheet onto the introduced base cloth or paper to make artificial leather or wall paper. The raw materials used are mainly polyvinyl chloride, followed by polyurethime, ethylene vinyl acetate copolymer and modified polyolefin and other amorphous plastics. The main characteristics are: large processing capacity, fast production speed, good product quality, uniform product thickness, and high degree of automation in production. And its main drawbacks include: large equipment, high investment, complex maintenance, and limited product width.

Classification