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The viscosity of TPU hot melt adhesive film is divided into early viscosity and late viscosity
​The viscosity of TPU hot melt adhesive film​ is divided into early viscosity and late viscosity. Only when the two are consistent can the stability of the adhesive film and the adhesive be guaranteed. When producing TPU hot melt adhesive films, it is necessary to ensure their properties such as oxidation resistance, halogen resistance, acid and alkali resistance, and plasticity, while selecting different viscosities based on different materials. The loss rate of TPU hot melt adhesive film is low, and the leftover materials can also be recycled, reducing energy consumption, carbon dioxide emissions, and costs.
2023-03-24
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The viscosity of TPU hot melt adhesive film is divided into early viscosity and late viscosity

    The viscosity of TPU hot melt adhesive film is divided into early viscosity and late viscosity. Only when the two are consistent can the stability of the adhesive film and the adhesive be guaranteed. When producing TPU hot melt adhesive films, it is necessary to ensure their properties such as oxidation resistance, halogen resistance, acid and alkali resistance, and plasticity, while selecting different viscosities based on different materials. The loss rate of TPU hot melt adhesive film is low, and the leftover materials can also be recycled, reducing energy consumption, carbon dioxide emissions, and costs.

    The application industries of TPU hot melt adhesive film include leather, shoe materials, microfibers, sports fabrics, composite phone shells, computer bags, and other electronic industries, as well as the bonding of wood, ceramics, textiles, and paper.

    TPU hot melt adhesive film is a synthetic resin and pure solid adhesive that is melted and bonded by heating, and has adhesive force after cooling. It can be used to improve the function or appearance of clothing. TPU hot melt adhesive film can also be used in some key parts, which can be seamlessly spliced or moisture-proof bonded. Cut to the corresponding total width, then press and press the fabric surface at high temperature until the TPU hot melt adhesive film fully meets the requirements, and then press and press according to technical standards at high temperature. This method is called hot stamping seamless splicing and bonding.

    TPU hot melt adhesive film has excellent water and dry cleaning resistance characteristics, with high temperature resistance reaching 110, and low temperature resistance reaching minus 20, with good tensile properties. In addition, its air permeability is very good. Due to this feature, TPU hot melt adhesive films are selected by many factories, not only working at different temperatures, but also having different characteristics. Therefore, when selecting a TPU hot melt adhesive film for bonding, it is necessary to pay attention to the melting point and temperature resistance of the adhesive.

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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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