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TPU film and TPU hot melt adhesive film: performance differences and cross-border application analysis
1. Core definition and material properties TPU film (thermoplastic polyurethane film) is a polymer elastomer based on polyurethane. It has the dual characteristics of rubber and plastic. It has the advantages of high elasticity, cold resistance (still soft when it remains -30℃ to -40℃), wear resistance, waterproofness and other advantages.
2025-05-13
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TPU film and TPU hot melt adhesive film: performance differences and cross-border application analysis

1. Core definition and material properties

TPU film (thermoplastic polyurethane film) is a polymer elastomer based on polyurethane. It has the dual characteristics of rubber and plastic. It has the advantages of high elasticity, cold resistance (still soft when it remains -30℃ to -40℃), wear resistance, waterproofness and other advantages.

Its hardness range is wide (80A±3A), and it can be flexibly applied to clothing, automotive interiors, medical devices and other fields. The TPU hot melt adhesive film is a adhesive film made of adding adhesive components to the TPU substrate, and seamless bonding between materials is achieved through heating and melting. Its melting point range is usually 55℃ to 125℃, and the processing temperature is recommended to be 110℃-170℃, with high bonding strength and environmentally friendly and solvent-free. Compared with traditional adhesives, TPU hot melt adhesive film does not require curing time and supports high-efficiency processes such as high-frequency welding and hot pressing composite.

2. Performance comparison and differentiation advantages

Physical properties

Elasticity and flexibility: The elongation of the TPU film is as high as 300%, suitable for dynamic stretching scenarios (such as sports uppers); while maintaining elasticity, the TPU hot melt adhesive film focuses more on bonding performance, especially suitable for the composite of heterogeneous materials (such as fabrics and plastics).

Temperature resistance: The TPU film has outstanding low temperature resistance (not brittle if -40℃), while the TPU hot melt adhesive film can achieve high temperature resistance through modification (some models withstand above 110℃), meeting the strict needs of automotive interiors and electronic components.

Environmental protection and safety are both RoHS standards and are non-toxic and odorless, but the TPU hot melt adhesive film does not require solvent coating, and the production process is lower in carbon

In the medical field, TPU hot melt adhesive film can directly contact the skin (such as medical dressings), while TPU membrane is used in structural components such as airbags and catheters.

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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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