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Temperature analysis of TPU hot melt adhesive film
TPU hot melt adhesive film needs to be heated and melted to become sticky, otherwise it is similar to ordinary plastic film. Therefore, temperature is the primary condition for good adhesion of TPU hot melt adhesive film. TPU hot melt adhesive film​ is composed of thermoplastic polyurethane, so it is also called thermoplastic polyurethane hot melt adhesive film. TPU hot melt adhesive film has good washability and softness, and is a popular hot melt adhesive film for most materials.
2022-09-20
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    Temperature analysis of TPU hot melt adhesive film

    TPU hot melt adhesive film needs to be heated and melted to become sticky, otherwise it is similar to ordinary plastic film. Therefore, temperature is the primary condition for good adhesion of TPU hot melt adhesive film. TPU hot melt adhesive film is composed of thermoplastic polyurethane, so it is also called thermoplastic polyurethane hot melt adhesive film. TPU hot melt adhesive film has good washability and softness, and is a popular hot melt adhesive film for most materials.

    TPU hot melt adhesive film is divided into two types: high melting point and low melting point. These two TPU hot melt adhesive films not only have different working temperatures, but also have very different properties. High temperature TPU hot melt adhesive film has good elasticity and high transparency. The ultra-low temperature TPU hot melt adhesive film has no elasticity and the color is milky white and matte.

    The hot-melt film of Lili is a double-layer structure, a layer of TPU hot melt adhesive film and a layer of lining paper. When in use, the surface should be bonded to the surface of the cloth. After cooling, tear off the candy paper for secondary bonding. One of the advantages of TPU hot melt adhesive film is that it can be laminated on the material that needs to be bonded, then cut into the desired shape, and then laminated on another sheet for bonding and cutting. This is very convenient for clothing re-dressing, which can reduce waste and reduce costs.

    When the TPU hot melt adhesive film does not melt, we need to pay attention that as long as the temperature of the TPU hot melt adhesive film is lower than the softening temperature of the material itself, the adhesive material will not deform during the hot pressing process. When choosing TPU hot melt adhesive film, developers need to consider this issue in advance to narrow the scope of TPU hot melt adhesive film and achieve multiplier effect with half the effort.

    TPU hot melt adhesive film is a recyclable green product. TPU hot melt adhesive film has low loss rate during production and use. In the process of making the input materials, the waste film can be completely recycled, which has the green advantage of reducing energy consumption, activation temperature, curing time, carbon dioxide emission and cost.

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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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