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Classification of hot melt adhesive film
The classification of hot melt adhesive films has been analyzed and introduced in detail in many articles. Different types of hot melt adhesive films have certain differences in their characteristics, applicable industries and products. In addition to classifying hot melt adhesive films according to the raw materials we understand, there is actually another classification method. It's just that this classification method is more comprehensive. According to whether there is a release paper or not, it can be divided into a hot melt adhesive film with a release paper and a hot melt adhesive film without a release paper (hot melt adhesive film without a substrate).
2023-05-31
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Classification of hot melt adhesive film

The classification of hot melt adhesive films has been analyzed and introduced in detail in many articles. Different types of hot melt adhesive films have certain differences in their characteristics, applicable industries and products. In addition to classifying hot melt adhesive films according to the raw materials we understand, there is actually another classification method. It's just that this classification method is more comprehensive. According to whether there is a release paper or not, it can be divided into a hot melt adhesive film with a release paper and a hot melt adhesive film without a release paper (hot melt adhesive film without a substrate).

In addition to distinguishing hot melt adhesive films from the base material, we can also compare the differences between them from several common dimensions such as high temperature resistance, low temperature resistance, water washing resistance, dry cleaning resistance, boiling water resistance, and flame retardancy;

(1) High temperature resistance: the high temperature resistance of the hot melt adhesive film made of pa and pes is above 120 degrees; the high temperature resistance of the hot melt adhesive film made of tpu is 110 degrees; Spend;

(2) Low temperature resistance: hot melt adhesive films made of pa and eaa materials can withstand low temperatures of minus 40 degrees;hot melt adhesive films made of pes materials can withstand low temperatures of minus 30 degrees; hot melt adhesive film made of tpu and eva materials can withstand low temperatures of minus 20 degrees;

(3) Washing resistance: pes is stronger in washing resistance than pa, pa is stronger than tpu, and tpu is stronger than eva;

(4) Dry-cleaning resistance: hot melt adhesive films made of pa and pes are resistant to dry-cleaning, and hot melt adhesive films made of eva and tpu are not resistant to dry-cleaning;

(5) Boiling resistance and flame retardant: Now the hot melt adhesive film, which is mainly functional PA raw material, can be made into boiling water resistance and flame retardant.

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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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