Hot melt adhesive film, production method thereof, and automobile door sill

Abstract

The invention discloses a hot melt adhesive film, a production method thereof, and an automobile door sill. The hot melt adhesive film for bonding a metal part and a plastic part comprises 20.00-50.00% of EAA, 10.00-50.00% of PE-g-MAH, 20.00-50.00% of EVA-g-MAH, 1.00-10.00% of tackifying resin, 0.10-0.50% of oleamide, 0.10-0.50% of erucamide, 0.10-0.50% of an antioxidant and 0.10-0.50% of a coupling agent. The hot melt adhesive film can be used for bonding the metal part and the plastic part, and has the advantages of no solvent volatilization, environmental protection, no pollution no healthrisks, high processing efficiency, device improvement, continuous production, increase of the yield, and high market acceptance.

Description

Technical field [0001] The invention relates to the field of polymer materials. Background technique [0002] Automobile threshold trim strips, also called welcome pedals, threshold strips, are generally made of surface metal plates (stainless steel, aluminum plate, aluminum alloy, polished, brushed, anodized, etc.) and intermediate plastic parts (PE, PP, EPDM, TPV and other materials), after bonding, punching and other processes, and finally a double-sided tape is attached to the bottom. It is used to fix the door sill bar, the door sill of the car and the trunk, for aesthetics and protection. The surface layer and the middle layer need to be fixed with an adhesive. Requires strong bonding and good weather resistance. [0003] At present, there are generally two bonding processes on the market. One is to use solvent-based adhesives for brushing and bonding, such as epoxy adhesives and unsaturated resins. Although the cost is low, the bonding process is complicated and the proc...

AI Technical Summary

Problems solved by technology

Although the cost is low, the bonding process is complicated and the process is cumbersome. Generally, multiple layers of glue are required, and the solvent is volatilized. The processing efficiency is low, and the glue dripping is easy to contaminate other products.

For products with edge wrapping and products with concave-convex texture, the glue distribution is uneven and the edge sealing is not firm due to the fluidity of the solvent.

Products in the process of solvent volatilization are easily polluted, and the solvent in the adhesive has great pollution to the environment and great physical harm to the operator

One is to use foam tape, represented by 3M foam glue. This tape is easy to use and is directly attached between two layers of materials. The construction is simple, but the cost is very high. At the same time, there is easy solvent residue in the tape, and the thickness of the tape is relatively thick. (Generally 0.5-1mm thick) makes the products without hemming unattractive, easy to adhere to dirt, high temperature resistance and durability are not very good, and the customer acceptance is not high

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