A car is made up of thousands of parts, and there are many parts involving the use of hot melt adhesive. Here are some common parts that are used in large quantities:

1. Headlights, the traditional method is to use a rubber sealing strip with holes and seal it by screws. After using hot melt adhesive, it can be quickly bonded and play a sealing role at the same time, which not only reduces the cost but also facilitates automatic production. The main types of hot melt adhesives are rubber type, APAO type and PUR type, which require good temperature resistance, high bonding glass strength and vibration resistance. At present, two-component adhesives are also available. License plate lights also use heat-resistant hot melt adhesive sticks to fix wire harnesses and electronic components.

2. In the past, the dashboard, ventilation duct, interior fixing buckle, etc. on the bridge were all fixed by mechanical methods, which was not only time-consuming and laborious, but also inefficient and had poor sealing performance. After using hot melt adhesive, the production efficiency and product quality are greatly improved. We mainly use heat-resistant hot melt adhesive sticks, and the base materials are EVA and polyolefin.

3, car roof, car roof is a composite of plastic plates, the types of hot melt adhesives are mainly adhesive film and rubber powder, and the base materials are PE and EVA.

4, car door panels, car door panels assembly needs to use hot melt adhesive bonding. There are PP pieces bonded, sound and wire harness fixed. APAO and heat-resistant glue sticks are mainly used.

5, car carpets and floor insulation pads, luggage buttons, etc., this is the place where cars use hot melt adhesives the most. The types of hot melt adhesives are glue blocks, glue particles and glue sticks. There are pressure-sensitive adhesives, EVA colloidal particles, glue sticks and APAO. It requires long opening time, convenient assembly and bonding of large pieces, good heat resistance and less odor.

6, automotive wiring harness fixed, there are a lot of wires inside the car, so many wire harnesses can't be fixed with conduit like our home decoration, fixing with hot melt adhesive is a time-saving and efficient method, and hot melt adhesive has a certain elasticity, it won't fall off during driving bumps, and it is easy to disassemble when it needs maintenance. Glue sticks and APAO-type hot melt adhesives are mainly used.

There are many kinds of interior decorations in automobiles. As far as materials are concerned, most of them belong to non-metallic materials such as PVC or ABS films, sheets, plates, foam plastic plates, carpets and wood grain decorative plates. Adhesive such as epoxy resin is generally used for decorative boards with large stress, while hot-melt adhesive, acrylate emulsion adhesive or solvent-based adhesive is generally used for decorative boards with small stress. For example, when the edges of doors and decorative lining boards are wrapped with plastic sheets, hot-melt crimping adhesive can be used to position them.

Generally, the roof line, noise-deadening gasket and rubber rain belt in the car are fixed in the car or in the door slot with neoprene or SBR solvent adhesive. Carpets and floors are generally adhered with PA hot-melt adhesive.