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Material and structure of TPU film
​Thermoplastic polyurethane elastomer film (TPU film​) is a widely used material in multiple fields. TPU film plays an indispensable role in many fields due to its unique material and structure, as well as various excellent properties. This article will provide a detailed introduction to the material and structure of TPU films, helping readers better understand the characteristics and applications of this material.
2023-12-27
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Material and structure of TPU film

    Thermoplastic polyurethane elastomer film (TPU film) is a widely used material in multiple fields. TPU film plays an indispensable role in many fields due to its unique material and structure, as well as various excellent properties. This article will provide a detailed introduction to the material and structure of TPU films, helping readers better understand the characteristics and applications of this material.

    1、 Material of TPU film

    The main component of TPU film is thermoplastic polyurethane elastomer, which is a linear segmented copolymer. It is composed of a soft part and a hard part. The soft part is composed of oligomeric polyols, while the hard part is composed of diisocyanates and chain extenders. This special combination structure enables TPU film to have both high elasticity of rubber and plasticity of plastic.

    The material of TPU film also has good wear resistance, oil resistance, water resistance, mold resistance, and UV resistance. These properties enable TPU films to maintain good stability and durability under various harsh environmental conditions.

    2、 Structure of TPU film

    The structure of TPU films can be divided into microstructure and macroscopic structure. The microstructure mainly involves the arrangement and morphology of TPU molecular chains, while the macroscopic structure focuses on the overall morphology and physical properties of TPU films.

    1. Microstructure

    At the microscopic level, the molecular chains of polyurethane (TPU) exhibit a unique linear block copolymer morphology. In the molecular chain, soft segments form flexible segments, endowing the TPU film with high elasticity; The hard segment forms a rigid chain segment to ensure that the TPU film has good mechanical properties and stability. The arrangement of molecular chains and the needle structure have a significant impact on the performance of TPU films.

    2. Macro structure

    At the macroscopic level, TPU films typically exhibit a transparent or semi transparent thin film state. Its thickness is generally between 0.03mm and 3mm, and can be adjusted according to actual needs. TPU film has good flexibility and ductility, which can maintain structural integrity and stability over a large deformation range. In addition, TPU film also has excellent tear resistance and resilience, which can withstand external impact and friction.

    4、 Summary

    As a high-performance thermoplastic elastomer material, TPU film has unique material and structure, thus possessing excellent properties such as high elasticity, wear resistance, and weather resistance, making it widely used in various fields such as automotive industry, construction, and electronics. Understanding the material and structure of TPU films helps to maximize their performance advantages and further explore their application areas. With the continuous development of technology, the performance and application prospects of TPU film will be even broader.

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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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