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The working bonding strength of TPU hot melt adhesive film
​The working bonding strength of TPU hot melt adhesive film refers to its adhesion force with the adhered object under specific temperature and pressure. Due to its excellent bonding performance and durability, TPU hot melt adhesive film is widely used for bonding and fixing various materials, such as fabrics, leather, plastics, metals, etc.
2024-01-31
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The working bonding strength of TPU hot melt adhesive film

    The working bonding strength of TPU hot melt adhesive film refers to its adhesion force with the adhered object under specific temperature and pressure. Due to its excellent bonding performance and durability, TPU hot melt adhesive film is widely used for bonding and fixing various materials, such as fabrics, leather, plastics, metals, etc.

    There are various methods for testing the bonding strength of work, and one commonly used method is the 90 degree peel test. This method involves pasting TPU hot melt adhesive film onto the adhesive, then placing it on a specific peeling machine to peel at a certain speed and angle, and recording the required force value. This force value is the working bonding strength and is one of the important indicators for evaluating the performance of TPU hot melt adhesive film.

    There are many factors that affect the bonding strength of TPU hot melt adhesive film, among which the most important are the material and surface treatment of the adhered material. Different materials have different adhesive forces on the adhesive film, so in practical applications, it is necessary to choose the appropriate adhesive film based on the material of the adhesive. Surface treatment is also a key factor affecting adhesion, and the surface of the adhered material must be clean, dry, and free of impurities such as oil stains to ensure the best adhesion effect.

    In addition to the material and surface treatment of the adhered material, the formula and production process of TPU hot melt adhesive film are also factors that affect its working bonding strength. Different formulas and processes can lead to different physical properties such as viscosity, melting point, and crystallinity of the adhesive film, thereby affecting its bonding performance. Therefore, in practical applications, it is necessary to choose the appropriate adhesive film formula and production process according to the specific situation.

    In practical applications, in order to improve the working bonding strength of TPU hot melt adhesive film, the following methods can be used:

    1. Surface treatment of the adhered material, such as polishing, sandblasting, chemical treatment, etc., to improve surface energy and increase bonding strength.

    2. Choose the appropriate TPU hot melt adhesive film formula and production process to achieve the best physical and bonding properties.

    3. Apply a certain amount of pressure and temperature during the pasting process to ensure close contact between the adhesive film and the object being adhered, increasing the bonding area and strength.

    4. For bonding parts that need to withstand gravity for a long time, regular inspections and maintenance should be carried out, and damaged parts should be repaired in a timely manner to ensure bonding strength and safety.

    In summary, the working bonding strength of TPU hot melt adhesive film is one of the important indicators for evaluating its performance. In practical applications, it is necessary to choose the appropriate adhesive film formula, production process, and surface treatment method according to the specific situation to ensure the best bonding effect. At the same time, for bonding parts that need to withstand gravity for a long time, regular inspections and maintenance should be carried out, and damaged parts should be repaired in a timely manner to ensure bonding strength and safety.

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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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