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What should I do if the transparent TPU film becomes foggy after being left for a long time?
It is a common problem that transparent TPU film becomes foggy after being left for a long time. This can be due to a variety of reasons, such as oxidation, UV exposure, moisture effects, etc. The following will introduce some methods to solve the problem of fogging of transparent TPU film.
2023-11-14
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What should I do if the transparent TPU film becomes foggy after being left for a long time?

    It is a common problem that transparent TPU film becomes foggy after being left for a long time. This can be due to a variety of reasons, such as oxidation, UV exposure, moisture effects, etc. The following will introduce some methods to solve the problem of fogging of transparent TPU film.

    1. Replace the sealed bag

    When the transparent TPU film is exposed to the air for a long time, it is easily affected by oxidation and becomes foggy. Therefore, it is recommended to store the TPU film in a sealed bag to reduce its contact with air. If fogging has occurred, consider replacing the sealed bag with a new one.

    2. Cleaning

    There may be dust or other impurities attached to the surface of the transparent TPU film, which will affect its transparency. Therefore, it is recommended to use a clean cloth or cotton swab to clean the surface, taking care not to use any chemicals for cleaning.

    3. Reduce UV exposure

    When the transparent TPU film is exposed to ultraviolet rays for a long time, it is prone to aging and fogging. Therefore, it is recommended to store the TPU film in a cool, dry place and minimize its exposure to sunlight.

    4. Drying treatment

    Transparent TPU film is prone to moisture and fogging in humid environments. Therefore, it is recommended to dry it before use. You can place the TPU film in a dry place to dry, or use a hair dryer to dry it.

    5. Replace with new TPU film

    If none of the above methods can solve the problem of the transparent TPU film becoming foggy, it is recommended to replace it with a new TPU film. When purchasing a new TPU film, you should pay attention to choosing a good quality brand to ensure its transparency and durability.

    In short, the problem of transparent TPU film becoming foggy can be solved through various methods. When choosing a solution, the choice should be made on a case-by-case basis. If none of the above methods solve the problem, it is recommended to seek professional advice.

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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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