TPU hot melt adhesive film: "Exclusive adaptation solution" for new energy vehicle interior
With the rapid expansion of the new energy vehicle market, its interior requirements in terms of environmental protection, lightweight, high and low temperature resistance are far beyond traditional fuel vehicles, and ordinary adhesives are difficult to meet these special needs. TPU hot melt adhesive film has become the "exclusive choice" of car companies with its precise overcoming of the pain points of interior decoration of new energy vehicles, and its core value is reflected in three key areas.
2025-09-15
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TPU hot melt adhesive film: "Exclusive adaptation solution" for new energy vehicle interior
With the rapid expansion of the new energy vehicle market, its interior requirements in terms of environmental protection, lightweight, high and low temperature resistance are far beyond traditional fuel vehicles, and ordinary adhesives are difficult to meet these special needs. TPU hot melt adhesive film has become the "exclusive choice" of car companies with its precise overcoming of the pain points of interior decoration of new energy vehicles, and its core value is reflected in three key areas.
First of all, the low VOCs characteristics are adapted to the "health cockpit" needs of new energy vehicles. New energy vehicles occupy a lot of space because of batteries, motors and other components, and the cockpit sealing is generally better than traditional fuel vehicles. If the interior adhesive releases VOCs, pollutants are more difficult to spread, which can easily lead to the air quality in the car not meeting the standards. The TPU hot melt adhesive film has no solvent volatilization during production and use, and the release of VOCs after curing is much lower than the national standard (GB/T 27630-2011). The actual data shows that in the cockpits of new energy vehicles using TPU hot melt adhesive film, the formaldehyde and benzene substance concentrations can be controlled below 0.02mg/m³ and 0.01mg/m³, which is far lower than the standard limit (formaldehyde 0.10mg/m³, benzene 0.11mg/m³). In contrast, the VOCs may still exceed the standard even after long-term ventilation, affecting the health of drivers and passengers. In addition, the TPU hot melt adhesive film has no irritating odor, which is highly consistent with the "quiet cockpit" concept pursued by new energy vehicles, avoiding the problem of traditional adhesive odors destroying the comfortable atmosphere in the car.
Secondly, the advantages of lightweight help new energy vehicles "improve the battery life". Climate range is the core competitiveness of new energy vehicles, and interior weight is one of the important factors affecting battery life. The thickness of the TPU hot melt adhesive film is only 0.1-0.5mm, and the weight per unit area is only 1/3 of the traditional solvent glue and 1/10 of the metal snap. There is no need for an additional fixed structure, which can greatly reduce the interior weight. Taking a pure electric SUV as an example, its interior includes more than 10 main components such as door panels, ceilings, seats, and instrument panels. If all TPU hot melt adhesive film is used instead of the traditional connection method, the weight of the vehicle's interior can be reduced by 8-12kg. According to industry estimates, for every 10kg of weight loss, the range of a pure electric vehicle can be increased by 5-8km, which means that the TPU hot melt adhesive film can increase the vehicle's range of 4-10km, indirectly improving product competitiveness. At the same time, the lightweight interior can also reduce the motor load, extend the battery life, and further reduce the cost of users using the car.
Finally, the stability of the wide temperature range responds to the "extreme environmental test" of new energy vehicles. The performance of new energy vehicle batteries will decline in low temperature environments. Some car companies will adopt cockpit preheating technology, which will cause the interior to frequently undergo a temperature cycle of "-30℃ low-temperature start-up - 60℃ high-temperature preheating"; and when exposed to the sun in summer, the temperature in the car can even reach above 70℃, which puts forward strict requirements on the high and low-temperature resistance of the adhesive. The TPU hot melt adhesive film can maintain stable bond strength within the temperature range of -40℃ to 120℃. After 500 high and low temperature cycle tests, the bonding layer has no cracking or degumming, and the peel strength retention rate exceeds 90%. In contrast, traditional water-based glues are prone to brittleness and cracking below -10℃, and hot-melt pressure-sensitive glues are prone to creep and debonding at high temperatures, making them difficult to adapt to the temperature environment of new energy vehicles. For example, for new energy vehicles used in cold areas, the skin of the dashboard bonded with TPU hot melt adhesive film can still maintain a flat fit even after multiple low-temperature preheating cycles, while the dashboard using traditional adhesives may have problems such as wrinkling and degumming.
