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Hot melt film
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Dongguan Green TPU Co.,Ltd.
14year TPU film/TPU hot melt adhesive film custom manufacturer
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From the characteristics of the TPU hot melt adhesive film itself
​From the characteristics of the TPU hot melt adhesive film itself, the high temperature resistance of the TPU hot melt adhesive film is relatively poor, because it is a thermoplastic material that needs to be heated and melted, and then cooled and hardened to bond. The initial melting point of conventional TPU hot melt adhesive film​ is generally between 40-120, so the theoretical high temperature resistance is around 120. But in fact, when it does not reach 120, the TPU hot melt adhesive film may soften to a certain extent, so the actual temperature resistance is a little lower than this temperature, about 100, which may be the peak value of conventional TPU hot melt adhesive film products.
2023-02-14
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From the characteristics of the TPU hot melt adhesive film itself

    From the characteristics of the TPU hot melt adhesive film itself, the high temperature resistance of the TPU hot melt adhesive film is relatively poor, because it is a thermoplastic material that needs to be heated and melted, and then cooled and hardened to bond. The initial melting point of conventional TPU hot melt adhesive film is generally between 40-120, so the theoretical high temperature resistance is around 120. But in fact, when it does not reach 120, the TPU hot melt adhesive film may soften to a certain extent, so the actual temperature resistance is a little lower than this temperature, about 100, which may be the peak value of conventional TPU hot melt adhesive film products.

    The selection of TPU hot melt adhesive film is actually a difficult problem. The selection result of TPU hot melt adhesive film will directly affect the composite quality of the film, so in essence, the selection of TPU hot melt adhesive film is a technical task. If it is a product under development, poor selection of the type of TPU hot melt adhesive film will lead to poor compounding, or directly lead to product development failure.

    For example, the shoe material industry and the clothing industry often have some differences. Although it may involve the bonding of some fabrics and leather, in the clothing industry, the requirements for washability are often relatively high, while the shoe material industry often does not have too many requirements in this regard, so the shoe material industry will have more Using EVA hot melt adhesive film, the garment industry will use more TPU hot melt adhesive film. Because the washability of TPU hot melt adhesive film is generally better than that of EVA film, the softness is also better, which is more in line with the characteristics of the clothing industry.

    Choosing TPU hot melt adhesive film is a technical issue, which needs to be taken seriously by buyers, and also requires a certain amount of energy and time. Specifically, the selection of TPU hot melt adhesive film must be determined through specific tests according to the actual requirements of the project. This requires you to contact the manufacturer, then listen to relevant opinions to narrow the selection range, and then test a variety of samples to determine which TPU hot melt adhesive film to choose.

    TPU热熔胶膜+离型纸底衬.jpg

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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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