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Hot melt adhesive film needs to be heated and melted to be sticky
Hot melt adhesive films have been used in many industries, such as footwear and clothing industries. In fact, different industries have different requirements for hot melt adhesive films, and the specific processes are also different. How to obtain a strong hot-melt adhesive film bonding effect is a problem that many users care about.
2021-12-31
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Hot melt adhesive film needs to be heated and melted to be sticky

Hot melt adhesive films have been used in many industries, such as footwear and clothing industries. In fact, different industries have different requirements for hot melt adhesive films, and the specific processes are also different. How to obtain a strong hot-melt adhesive film bonding effect is a problem that many users care about.

The melting temperature of hot melt adhesive films made of different materials is different, that is, there are high temperature and low temperature. If the heating temperature is higher than the temperature required for the hot-melt adhesive film, the hot-melt adhesive film will melt too quickly or excessively, making it easy for the glue to penetrate into the material to be glued. Especially in some textile fields, if the temperature is too high, the glue will penetrate and affect the bonding effect.

If the bonding temperature is too low to reach the recommended temperature of the hot melt adhesive film, the hot melt adhesive film will melt incompletely or too slowly, so that the adhesive will not melt within a certain period of time. It diffuses well into the adherend and cannot form good adhesion. When bonding materials, we put the hot melt adhesive film between the materials to be bonded, and at the same time, we need to apply a certain pressure to finally get a good bonding.

What are the main components of TPU hot melt adhesive film?

Those who know a lot about hot melt adhesive films will be interested in TPU hot melt adhesive films. TPU hot melt adhesive film is a special hot melt adhesive film made of a variety of materials. It is easy to attract people's attention. First of all, we should know that TPU hot melt adhesive film is a kind of glue. This is an environmentally friendly adhesive. Like all hot melt adhesive films, it has good adhesion and connection properties. Moreover, TPU hot melt adhesive film has a wide range of applications, which is mainly related to its multi-melting point range.

As we all know, hot melt adhesive films are divided into hot melt adhesive films, PA hot melt adhesive films, PES hot melt adhesive films, EVA hot melt adhesive films and POhot melt adhesive films according to different raw materials. The main component of TPU hot melt adhesive film is TPU, which exhibits good elasticity as the melting point temperature increases. TPU film also has this feature.

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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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