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Application of PET-TPU composite film
To understand PET-TPU composite film​, we must first know what is PET release film. The PET release film is based on the PET film and coated with a layer of methyl silicone oil on its surface to reduce the surface adhesion of the PET film (in other words, it can prevent sticking)
2022-07-05
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Application of PET-TPU composite film

To understand PET-TPU composite film, we must first know what is PET release film.

The PET release film is based on the PET film and coated with a layer of methyl silicone oil on its surface to reduce the surface adhesion of the PET film (in other words, it can prevent sticking)

PET film with base film has the following characteristics: 1. Low cost; 2. Easy to produce and process; 3. Environmentally friendly, non-toxic and tasteless; 4. Good tensile strength.

The PET-TPU composite film is made by compounding the PET release film on the surface of the TPU film by pressing and winding processes, so the TPU composite film takes into account the advantages of TPU and PET. The PET-TPU composite film protects theTPU film from being stretched during processing.

PET film is a kind of release film, which can play the following five functions in composite TPU film.

1.1 Surface. PET-TPU composite film is cleaner;

2. PET-TPU composite film is smoother;

3. When used for printing, it will not be deformed or stained;

4. It is easier to handle.

5. Good tensile strength

The role of PET in the PET-TPU composite film is to make the surface of the TPU film cleaner! When printing TPU film, PET release film protects it from deformation and keeps its surface clean to prevent it from being contaminated. In order to prevent the TPU film from sticking back, one side of the PET release film has an anti-sticking function, so it will not stick together when rolled up.

TPU film has the characteristics of biocompatibility, non-toxicity, no allergic reaction, no local irritation, and no pyrogen. Due to its excellent performance and environmental protection concept, people are more and more interested in it, and the breadth and depth of its application are also expanding. With the upgrading of industrial technology, the use of TPU film to replace non-environmental protection film has become the development trend of environmental protection policies around the world. Our company can also produce three-layer PET-TPU-PET composite film. Please look for Dongguan GreenTPU Environmental Protection New Material Technology Co., Ltd.! Welcome to inquire!

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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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