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Hot melt adhesive film is applied to the bonding between two different substances
​Hot melt adhesive film is applied to the bonding between two different substances, but it is actually the same principle as double-sided adhesive tape. Good adhesion, strong washability, and the heat transfer material is seamlessly bonded to heat-resistant fabrics.
2023-06-15
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Hot melt adhesive film is applied to the bonding between two different substances

    Hot melt adhesive film is applied to the bonding between two different substances, but it is actually the same principle as double-sided adhesive tape. Good adhesion, strong washability, and the heat transfer material is seamlessly bonded to heat-resistant fabrics.

    1. Color: Due to the different colors of combustible materials, the color requirements for Hot melt adhesive films must be different. Then, if the content itself has no special requirements for color, it is recommended to use yellow Hot melt adhesive film. Generally speaking, the viscosity of yellow Hot melt adhesive film is better than that of white Hot melt adhesive film.

    2. Surface treatment: We are not as strict as any other adhesives in the surface treatment of Hot melt adhesive film, but secondly, the dust and grease on the surface must be properly handled, and Hot melt adhesive film technology can achieve better act as an adhesive.

    3. Working time: fast operation is the main feature of Hot melt adhesive film. The working time of the Hot melt adhesive film is generally about 15 seconds. With the widespread use of modern production methods and assembly lines, the working time of the Hot melt adhesive film is getting shorter and shorter. For example, in the case of bookbinding and loudspeaker manufacturing, the working time requirement for Hot melt adhesive film is about 5 seconds.

    4. Thermal stability: Hot melt adhesive film is more sensitive to temperature. When the temperature reaches a certain level, the Hot melt adhesive film begins to soften, and when it is lower than a certain temperature, the Hot melt adhesive film will become brittle. Therefore, the selection of the Hot melt adhesive film should fully consider the situation of the product when the ambient temperature changes.

    5. Viscosity: The viscosity of the Hot melt adhesive film is divided into early viscosity and late viscosity. The initial viscosity and late viscosity must be consistent to maintain the stability of theHot melt adhesive film and insulation. In the production process of Hot melt adhesive film, it is necessary to ensure oxidation resistance, halogen resistance, acid resistance and plasticity.

    In humid weather, what problems will be faced in the storage and use of Hot melt adhesive film, and how can it show the effect of application?

    1. Pay attention to the changes of temperature and humidity in the workshop.

    2. If the Hot melt adhesive film is used in hot stamping equipment, it is necessary to preheat the machine first, and the effect of hot stamping will be better after removing moisture.

    3. If the Hot melt adhesive film is stored for a long time, it is necessary to pay attention to the ventilation of the environment.

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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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