What are the processing technologies of TPU films?

The processing technology of TPU (thermoplastic polyurethane) film mainly includes several main methods such as extrusion molding, blow molding, coating molding and hot press molding.

1. Extrusion: This method is commonly used to produce flat films. After the TPU particles are heated to a molten state, they are extruded through an extruder to form a continuous film. The temperature and pressure during the extrusion process need to be precisely controlled to ensure the uniformity and performance of the film.

2. Blow molding**: Blow molding is often used to produce thicker TPU films, especially bag and container type products. The molten TPU is extruded into a tube and blown to the desired size by an external gas. This method can improve the strength and elasticity of the film.

3. Coating Molding: This process forms a composite film by coating TPU on a substrate such as paper, cloth, or plastic. This method is widely used in products that require abrasion resistance and water resistance, such as the outer protective layer of electronic products.

4. Hot press molding**: In this process, the TPU raw material is placed in a mold and molded by heating and pressurizing. This method is suitable for film products with complex shapes, ensuring strength and consistency.

Different processing technologies are suitable for different application scenarios, and choosing the right method can significantly improve the performance and market competitiveness of TPU films.