The requirements for rubber used in the automotive sector have always been quite strict, because as a confined space, the air quality inside the car needs to be guaranteed to a certain extent. Furthermore, as a means of transportation, the reliability of automobiles also needs to be guaranteed. Therefore, automotive adhesives generally have strict inspection and control over environmental protection and adhesive strength.
The composite of automobile roofs may involve the bonding of various materials. The advantage of using hot melt adhesive film is that volatile VOCs in the car can be strictly controlled to meet environmental standards. In addition, the composite process is clean, and the adhesive strength is guaranteed after compounding. Hot-melt adhesive film products for automotive composite generally use EVA or TPU hot-melt adhesive film without a substrate. Substrate-free hot melt adhesive films that do not require paper not only improve processes and compound efficiency, but can also reduce the cost of enterprises using hot melt adhesive films to a large extent.
