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Dongguan Green TPU Co.,Ltd.
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What is the reason why the TPU hot melt adhesive film is not firmly bonded sometimes?
​TPU hot melt adhesive film​ can be accepted by a wide range of industries. It is not only firmly bonded, but also has high elasticity, and can be used for various bonding materials. TPU hot melt adhesive film has good washing and dry cleaning resistance, high temperature resistance can reach 110, low temperature resistance can reach minus 20, and has good tensile properties. In addition, it is also very breathable. Because of these characteristics, TPU hot melt adhesive film is chosen by people. Here, I will introduce some application cases:
2023-04-25
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What is the reason why the TPU hot melt adhesive film is not firmly bonded sometimes?

    TPU hot melt adhesive film can be accepted by a wide range of industries. It is not only firmly bonded, but also has high elasticity, and can be used for various bonding materials. TPU hot melt adhesive film has good washing and dry cleaning resistance, high temperature resistance can reach 110, low temperature resistance can reach minus 20, and has good tensile properties. In addition, it is also very breathable. Because of these characteristics, TPU hot melt adhesive film is chosen by people. Here, I will introduce some application cases:

    1. Seamless wall covering adhesive

    The back glue of seamless wall cloth is mostly eva, but its disadvantages are very obvious, and the melting point temperature of TPU hot melt adhesive film is lower than eva, which is more suitable for seamless paste corner treatment.

    2. Leather and sponge

    Usually PA and TPU hot melt adhesive films are used as the compound application of leather and sponge. If you have higher softness, TPU hot melt adhesive film has more advantages.

    What is the reason why the TPU hot melt adhesive film is not firmly bonded sometimes?

    (1) Confirm whether the TPU hot melt adhesive film used is a TPU hot melt adhesive film: the product that may be purchased is not a regular TPU hot melt adhesive film. Although this is unlikely, our clients have encountered similar cases before working with us;

    (2) Whether the fabric is compatible with TPU hot melt adhesive film: Although we can directly use it to fit the fabric, not all of them are suitable, so we need to know whether it is compatible, otherwise there will be no firmness and no adhesion .

    (3) Determine whether there is a problem in the use process: it may also be due to improper use conditions, resulting in insufficient filming of the TPU hot melt adhesive film, resulting in weak bonding.

    The above is the reason why the TPU hot melt adhesive film is sometimes not firmly bonded. Related content, I believe everyone will know something after reading it. If necessary, welcome to consult.

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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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