TPU white film, black film, and transparent film differ in several aspects.

TPU white film, black film, and transparent film differ in several aspects, as detailed below:

Appearance and Color

TPU Transparent Film: Colorless and transparent, with a high light transmittance of over 90%, allowing clear visibility of object surfaces. Commonly used in scenarios where appearance needs to be displayed, such as mobile phone screen protectors and transparent packaging materials, protecting the product's appearance without affecting it.

TPU White Film: White in color, varying in whiteness and gloss depending on the manufacturing process and requirements. High-gloss white film has a mirror effect, while matte white film has a soft surface. It offers good light-blocking properties, giving objects a soft white appearance. Commonly used in clothing and footwear materials, it provides color enhancement while maintaining product appearance.

TPU Black Film: Black in color, with strong optical blocking properties, effectively blocking ultraviolet and visible light. Suitable for scenarios requiring light blocking and privacy protection, such as automotive window film and architectural window film, effectively blocking direct sunlight and reducing indoor temperature.

Physical Properties

Flexibility: TPU transparent and white films offer relatively good flexibility. The transparent film quickly returns to its original shape after stretching, making it suitable for products requiring a certain degree of elasticity and flexibility, such as mobile phone cases. The flexibility of the white film makes it widely used in footwear and apparel, adapting to bending and stretching movements in shoe uppers and clothing. The TPU black film, due to the addition of black pigments, has slightly reduced flexibility, but still retains a certain level of flexibility, suitable for general light-blocking and packaging applications.

Abrasion and Scratch Resistance: TPU transparent films exhibit excellent abrasion and scratch resistance, effectively resisting daily friction and scratches while maintaining transparency and a smooth surface. Both white and black films inherit the abrasion-resistant properties of TPU materials. The white film can withstand friction in applications such as shoe uppers and apparel, while the black film resists scratches from external objects in applications such as automotive window film.

Aging Resistance: TPU transparent films are prone to yellowing under light, affecting transparency and appearance. White and black films, due to the addition of pigments or dyes, are relatively less prone to yellowing and have slightly better aging resistance, especially black films, whose UV-blocking properties can delay material aging.

Processing Technology

TPU Transparent Film: Typically produced using extrusion molding. Temperature and pressure are controlled to ensure uniform flow of the TPU material to form a film. This process is relatively simple, mature, and easy for large-scale production.

TPU White Film: In addition to extrusion molding, white pigments or dyes need to be added to the raw materials. High requirements are placed on pigment dispersion and uniformity to ensure color and performance stability. Various processes such as casting and blown film production can be used.

TPU Black Film: Similar to white film, black pigments need to be added to the raw materials. Strict control of the amount added and dispersion is required. Due to the characteristics of the pigment, attention must be paid to color uniformity and film performance consistency during production. Extrusion molding is also generally used.

Application Areas

TPU Transparent Film: Commonly used as screen protectors for electronic devices such as mobile phones and tablets, providing clear display and protection. In packaging, it can be used for food and cosmetic packaging, showcasing the product's appearance while providing protection. It can also be used as a transparent protective film for medical devices.

TPU White Film: Widely used in the apparel industry, such as in the production of waterproof and breathable fabrics, protecting clothing while providing a comfortable wearing experience. In footwear, it can be used for upper materials, enhancing the aesthetics and durability of shoes. It can also be used in bags, leather goods, and other areas, providing a soft appearance and good performance.

TPU Black Film: Primarily used in automotive window film, blocking sunlight, reducing interior temperature, and protecting privacy. In the construction industry, it can be used as architectural window film, providing energy conservation and privacy protection. Additionally, it can be used for packaging of light-sensitive products, such as electronics and pharmaceuticals.