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Dongguan Green TPU Co.,Ltd.
15year TPU film/TPU hot melt adhesive film custom manufacturer
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Several production methods, characteristics and advantages of TPU film
1. Extrusion method: add the Tpu raw material into the barrel of the extruder, heat and melt, extrude the sheet TPU film, trim the edges and wind it.
2022-05-05
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Several production methods, characteristics and advantages of TPU film

1. Extrusion method: add the Tpu raw material into the barrel of the extruder, heat and melt, extrude the sheet TPU film, trim the edges and wind it.

2. Blow molding method: The molding feature of the blow molding method is that the extruded TPU film is made into a tube blank through an annular gap die, and compressed air is introduced axially from the mandrel, and the TPU film is clamped with a pair of clamping rods. Keeping it at a constant internal pressure, it expands to the desired diameter. After cooling and setting, traction coiling.

3. Calendering method: It is a method of continuously forming TPU film through several axles, and the axles are heated inside and rotated adjacently. The thickness of the TPU film depends on the clearance of the last axle.

4. Casting method: First, the TPU raw material is melted, filtered, and defoamed, and then sent to a casting machine, and the solution is cast into a TPU film of a certain thickness through a casting nozzle.

5. Stretching method: It is a film-forming method in which the TPU film is stretched longitudinally and transversely between the softening temperature and the melting temperature. The stretching technology of TPU film can be divided into uniaxial stretching and biaxial stretching, but biaxial stretching is mainly used in actual production. Biaxial stretching can improve the properties of TPU films.

Main features and advantages of TPU film

1. The TPU film is available in transparent, translucent or opaque, colored or solid color upon request.

2. We can make TPU film according to your needs, i.e. antistatic, high smoothness, flame retardant and antibacterial.

3. The width of TPU film can be produced from 50mm to 1500mm.

4. Excellent abrasion resistance, tear strength and puncture resistance even at low temperature

5. TPU film has excellent environmental resistance to gas, ozone, water, oil and chemicals

6. TPU film has excellent biocompatibility

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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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