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Reasons for the opening of TPU hot melt adhesive film
​The temperature is too high during operation. ​Although the TPU hot melt adhesive film needs to be melted at a higher temperature, then the compounding process is completed. However, in the actual application process, we must also pay attention to temperature control to avoid excessive temperature, otherwise the film material will be easily degraded and lose its viscosity. TPU hot melt adhesive film is a kind of polymer compound. In the process of bonding with the material to be bonded, its essence is a kind of diffusion of its own macromolecules in the process of heating and movement, so that they dissolve each other, and finally make the glue move and the adherend molecules form a firm bond.
2023-02-15
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Reasons for the opening of TPU hot melt adhesive film

    The temperature is too high during operation.

    Although the TPU hot melt adhesive film needs to be melted at a higher temperature, then the compounding process is completed. However, in the actual application process, we must also pay attention to temperature control to avoid excessive temperature, otherwise the film material will be easily degraded and lose its viscosity. TPU hot melt adhesive film is a kind of polymer compound. In the process of bonding with the material to be bonded, its essence is a kind of diffusion of its own macromolecules in the process of heating and movement, so that they dissolve each other, and finally make the glue move and the adherend molecules form a firm bond.

    In the process of using TPU hot melt adhesive film for bonding, some people will have problems with poor bonding. For this kind of problem, many factors should be considered, such as the type of TPU hot melt adhesive film, the temperature during the lamination process is not up to standard or incompatible with the adhesive material. Therefore, when purchasing TPU hot melt adhesive film, it is necessary to learn more about the materials to be bonded and the performance of TPU hot melt adhesive film, so as to make the best fit effect more stable.

    Although TPU hot melt adhesive film has a wide range of applications and a high penetration rate, it is beyond the reach of most people because it belongs to the field of industrial applications. So in the cognition of many people, they may not have the impression of it. What looks like plastic film is actually an adhesive that can be used in a variety of places!

    From its characteristics, TPU hot melt adhesive film is actually an adhesive with certain toughness, but not hardness. The hardness of 502 glue is very strong, but it lacks toughness. Different functions also correspond to different usage scenarios, so the two are not interchangeable.

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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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