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Hot melt film
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What problems may occur during the production process of TPU film
​TPU film may encounter various problems during the production process. The following are some common production problems and solutions:
2023-11-09
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What problems may occur during the production process of TPU film

    TPU film may encounter various problems during the production process. The following are some common production problems and solutions:

    1. Delamination or cracking of the TPU film

    Reason: Raw material issues or improper processing parameters

    Solution: Check the raw materials, especially the hard segment content and dispersibility, and adjust processing parameters appropriately, such as temperature, pressure, and residence time, to improve the interlayer adhesion and anti cracking performance of the film.

    2. Color difference in the TPU film

    Reason: Raw material issues or improper processing parameters

    Solution: Check raw materials, especially color masterbatches and additives, and adjust processing parameters such as temperature, pressure, and residence time appropriately to improve color consistency.

    3. Odor appears on the TPU film

    Reason: Raw material issues or improper processing parameters

    Solution: Check raw materials, especially additives such as plasticizers and antioxidants, and adjust processing parameters appropriately, such as temperature, pressure, and residence time, to reduce odor generation.

    4. Low light transmittance of thin TPU films

    Reason: Raw material issues or improper processing parameters

    Solution: Check raw materials, especially additives and fillers, and adjust processing parameters such as temperature, pressure, and residence time appropriately to improve light transmittance.

    5. High thermal shrinkage of thin TPU films

    Reason: Raw material issues or improper processing parameters

    Solution: Check raw materials, especially additives such as plasticizers and compatibilizers, and adjust processing parameters appropriately, such as temperature, pressure, and residence time, to reduce thermal shrinkage.

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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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