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What temperature is generally better for hot melt adhesive film?
In layman's terms, it is to adjust the temperature of the composite equipment at what temperature can make the adhesion of the hot melt adhesive film to the material reach the ideal state. Of course, this temperature value must be the temperature resistance requirement of the material, otherwise the material will be damaged due to high temperature.
2021-09-15
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What temperature is generally better for hot melt adhesive film?

In layman's terms, it is to adjust the temperature of the composite equipment to what temperature can make the adhesion of the hot melt adhesive film to the material reach the ideal state. Of course, this temperature value must be the temperature resistance requirement of the material, otherwise the material will be damaged due to high temperature.

Therefore, at what temperature the hot melt adhesive film has a better fusion bonding effect, the key is to look at the temperature resistance value of the bonded material, and then choose the type of hot hot melt adhesive film to be used according to the requirements of material compatibility . Through these two dimensions, we can basically determine which hot melt adhesive film to use, and the next thing to do is actually proofing test!

Can hot melt adhesive film be used for acrylic sheet?

Acrylic board can be made of hot melt adhesive film. It is a solid at room temperature. It melts to a certain temperature when heated and becomes a liquid, which can flow and has a certain viscosity. The melted EVA hot melt adhesive film is light brown or white. EVA hot melt adhesive film is composed of basic resin, tackifier, viscosity modifier and antioxidant.

The base resin of the hot melt adhesive film is high-temperature and high-pressure copolymerization of ethylene and vinyl acetate, that is, ethylene-vinyl acetate copolymer. This type of resin is the main component of the hot melt adhesive film, and the ratio and quality of the basic resin determine the basic performance of the hot melt adhesive film.

The formation and solution ofhot melt adhesive film impurities.

Clean the glue pot, improve the glue application environment, and make the impurities of the hot melt adhesive film disappear. Before using hot melt adhesive films, a melting process is required. During the whole process, other sundries may be mixed in. For example, when books are glued, some paper scraps and dust may fall into the glue tank.

There will be some carbides deposited over the years in the furnace, which may be mixed with newly melted glue, and so on. Maybe a little dust will not have much influence on the use and performance of the hot melt adhesive film, but what if the adhesive itself must match the appearance of the product? This requires special attention from users of hot melt adhesive films.

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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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