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What is the method for processing the reverse side of TPU film?
​Thermoplastic polyurethane (TPU) films exhibit excellent physical, chemical and mechanical properties in various application fields, and are particularly suitable for high-tech products such as smartphones, tablets and sports equipment. Therefore, when producing and applying TPU films, backside processing is a very important step and indispensable.
2023-09-18
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What is the method for processing the reverse side of TPU film?

    Thermoplastic polyurethane (TPU) films exhibit excellent physical, chemical and mechanical properties in various application fields, and are particularly suitable for high-tech products such as smartphones, tablets and sports equipment. Therefore, when producing and applying TPU films, backside processing is a very important step and indispensable.

    Generally, there are two methods for back treatment of TPU film:

    1. Spray

    Coating is a common post-processing method for TPU films. When producing TPU film, a special coating is applied on the back to make the film surface smooth, scratch-free and durable, while enhancing its UV resistance and anti-settlement capabilities. Commonly used post-coating materials for TPU films include polyurethane, polyester, acrylic, and silicone. The use of different materials can give TPU films different performance characteristics.

    2. Apply protective film

    During the production and application of TPU films, a protective film is often used on the back of the film to prevent scratches, bubbles, stains and other problems. Commonly used protective film materials include polyethylene film and polyester film, with polyethylene film being a common choice. Polyethylene film has high transparency, good tear resistance, and a smooth surface after adding lubricants.

    The backside treatment of TPU film is a very important process, and different treatment methods are suitable for different applications. According to the needs of the specific application, choose the appropriate back treatment method, and pay attention to proper care and maintenance during use to extend its service life.

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TPU hot melt adhesive film vs anaerobic adhesive: "Scene flexibility" difference in automotive interior bonding
2025-09-11
​From the perspective of curing conditions, TPU hot melt adhesive film does not need to rely on special environments, while anaerobic adhesives are severely restricted by "auerobicity". The curing principle of anaerobic glue is to undergo polymerization under conditions of lack of oxygen and catalyzed by metal ions (such as iron and copper). If it is in an environment where air circulation or metal substrates are not available, the curing speed will be greatly slowed down or even unable to cure. In automotive interiors, most bonding scenarios are "open" (such as bonding the door panel skin to PP substrate, and the ceiling fabric to the sponge), the air can freely contact the bonding surface, and the substrate is mostly non-metallic (PP, ABS, fabric, etc.), lacking metal ion catalysis, and additional catalyst is required when using anaerobic glue, and the curing time is as long as several hours, which is difficult to meet the needs of industrial production. The TPU hot melt adhesive film only needs to be melted by heating (120-160℃) and can be cured after pressurization and cooling. It does not need to rely on the ambient oxygen concentration or the base material. It can be cured stably in open or closed bonding scenarios, and the curing time only takes a few dozen seconds to a few minutes, adapting to the fast-paced needs of the interior production line.
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