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Temperature analysis of TPU hot melt adhesive film
TPU hot melt adhesive film needs to be heated and melted to be sticky, otherwise it is similar to ordinary plastic film. Therefore, temperature is the primary condition for good adhesion of TPU hot melt adhesive films. TPU hot melt adhesive film​ is mainly composed of thermoplastic polyurethane, so it is also called thermoplastic polyurethane hot melt adhesive film. With good washability and softness, it is a popular hot melt adhesive film for most materials.
2022-07-15
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Temperature analysis of TPU hot melt adhesive film

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

TPU hot melt adhesive films are divided into high melting point type and low melting point type. These two types of hot melt adhesive films not only have different working temperatures, but also have very different characteristics. The high temperature TPU hot melt adhesive film is malleable and the color is completely transparent. The ultra-low temperature TPU hot melt adhesive film is inelastic and its color is milky white frosted.

The TPU hot melt adhesive film has a double-layer structure, one layer of TPU hot melt adhesive film and one layer of release paper. When using, the adhesive surface should be bonded with the cloth surface. After cooling, tear off the release paper for secondary bonding. One advantage of TPU hot melt adhesive film is that it can be compounded on the material to be bonded first, then cut into the desired shape according to the requirements, and then compounded on another sheet for bonding and cutting. This has great convenience in clothing re-dressing, which reduces waste and reduces 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 adhered material will not deform during the hot pressing process. When developers choose TPU hot melt adhesive film, they need to consider this issue in advance and narrow the range of TPU hot melt adhesive film models, so as to achieve more with less effort.

TPU hot melt adhesive film is a recyclable green product, and TPU hot melt adhesive film has a low loss rate during production and use. In the process of making the input material, the membrane waste 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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