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The use effect of TPU hot-melt adhesive film will change due to these conditions
1. Surface treatment of adhesive The surface treatment of TPU hot melt adhesive film is not as strict as other adhesives, but the dust and oil stains on the surface of the adhesive should also be properly treated, so that the TPU hot melt adhesive film can play a better role.
2023-03-16
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The use effect of TPU hot melt adhesive film will change due to these conditions

    1. Surface treatment of adhesive

    The surface treatment of TPU hot melt adhesive film is not as strict as other adhesives, but the dust and oil stains on the surface of the adhesive should also be properly treated, so that the TPU hot melt adhesive film can play a better role.

    2. Temperature resistance

    TPU hot melt adhesive film is more sensitive to temperature. When the temperature reaches a certain level, the hot-melt adhesive film begins to soften. Below a certain temperature, the TPU hot melt adhesive film will become brittle. Therefore, the selection of TPU hot melt adhesive film needs to take into account the environmental temperature changes of the material to adapt to the environment.

    3. Adhesive force

    The viscosity of TPU hot melt adhesive film is divided into early viscosity and late viscosity. Only when the early adhesion and late adhesion are consistent, can the adhesive film and the adherend remain stable. In the production process of the adhesive film, it should be guaranteed to have oxidation resistance, halogen resistance, acid and alkali resistance and plasticity. The viscosity of the adhesive film varies according to the material to be pasted. Therefore, different types of TPU hot melt adhesive films need to be selected according to different materials.

    4. Color

    Because the color of the pasted objects is different, the color standard of TPU hot melt adhesive film also needs to be different. If the pasted object has no special requirements for color, it is recommended to use yellow adhesive film. Generally, yellow adhesive films are more sticky than white ones.

    5. Working hours

    Fast operation is a major advantage of TPU hot melt adhesive film. The working time of TPU hot melt adhesive film is usually 15 seconds. In recent years, with the application of production mode - assembly line operation, the working time of adhesive film has become shorter, such as book binding, speaker manufacturing, etc. The operation time needs to reach 5 seconds.

    TPU hot melt adhesive film has good water and dry cleaning resistance, high temperature resistance can reach 110, low temperature resistance can reach minus 20, and has good tensile property. In addition, its air permeability is very good. TPU hot melt adhesive film is selected by many factories due to this feature.

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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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