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Why does TPU film​ show color differences
Color differences often occur during the manufacturing and use of TPU films, which may be caused by various factors. The following are several possible reasons for color differences in TPU films:
2023-11-16
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Why does TPU film show color differences

Color differences often occur during the manufacturing and use of TPU films, which may be caused by various factors. The following are several possible reasons for color differences in TPU films:

1. Raw material difference: TPU film is made of TPU particles. There may be certain differences in TPU particles from different batches, manufacturers, or raw material suppliers, which may lead to differences in the color of the final product.

2. Formula difference: The formula of TPU film may contain multiple additives and pigments, and the proportion and type of these components may affect the color of the final product. Any slight changes in the formula may result in color differences.

3. Manufacturing process differences: The manufacturing process of TPU film involves many parameters, such as temperature, pressure, time, etc. Changes in these parameters may lead to differences in product color. In addition, the processing accuracy and performance of different equipment may also affect the color of the product.

4. Aging and degradation: After prolonged exposure to the environment, the TPU film may age or degrade, which may lead to color changes. Environmental factors such as ultraviolet radiation, temperature, and humidity have an impact on the color of TPU films.

5. Storage and transportation: TPU film may be affected by environmental factors such as light, temperature, and humidity during storage and transportation, resulting in color changes.

After understanding the reasons that may cause color differences in TPU films, we can take some measures to reduce the occurrence of color differences. Firstly, select TPU particles with stable quality and reliable formulas to ensure the consistency of raw materials. Secondly, optimize the manufacturing process, control parameters such as temperature, pressure, and time, and improve product consistency. In addition, appropriate anti-aging measures should be taken, such as adding ultraviolet absorbers or antioxidants, to slow down the aging process of the material. Finally, ensure the stability of environmental factors during storage and transportation to avoid adverse effects on materials.

In summary, understanding the causes of color differences in TPU films and taking corresponding measures can help reduce the occurrence of color differences and improve product quality and consistency.

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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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