Automobile industry glue type·Hot melt glue!

Hot melt adhesives are the most environmentally friendly and suitable for high-speed automatic assembly line operations

Features of Hot Melt Adhesive:

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Types of hot melt adhesives for automobiles:

Most of the hot melt adhesives have been used in automobiles, but different parts and uses will choose different types of hot melt adhesives

Application of hot melt adhesive in automobiles:

A car is composed of thousands of parts and components, and there are many parts that involve the use of hot melt adhesive.

1.

2.

3.

4.
The car door panel and the car door panel assembly need to use hot melt adhesive to bond
.
There are PP parts bonding, sound and wire harness fixing
.
Mainly use APAO and temperature resistant glue sticks
.

5.
Car carpets and floor insulation pads, luggage buckles, etc.
, which are the places where cars use hot melt glue most
.
The types of hot melt adhesives are glue blocks, glue pellets and glue sticks
.
There are pressure-sensitive adhesives, EVA pellets, glue sticks and APAO
.
It is required to open for a long time, which is easy to assemble and fit large parts, has good heat resistance and low odor
.

6.
The car wiring harness is fixed.
There are a large number of wires inside the car.
So many wiring harnesses cannot be fixed with pipes like our home decoration.
Fixing with hot melt adhesive is a time-saving and efficient method, and there is a certain amount of hot melt adhesive.
It is flexible and will not fall off during driving bumps, and it is easy to disassemble when maintenance is needed
.
Mainly use glue stick and APAO type hot melt adhesive
.

Examples of hot-melt adhesives used in automotive applications such as hot pressing and welding
.

1.
Bonding of polyvinyl chloride ceiling and thermal insulation layer, etc.

Solvent-based adhesives are mostly used for the bonding of PVC ceilings, which are used in a large amount
.
However, the use of this adhesive requires ventilation to dry the solvent, and the operating conditions are poor, and it is not environmentally friendly, which affects the health of workers
.
Therefore, this year, polyamide hot-melt adhesive is used to replace the above-mentioned adhesives.
In addition, other heat-insulating layers of car roofs and car bodies can also be hot-pressed in the following order (hot-pressing temperature is 150°C)
.

1.
Water-resistant corrugated material

2.
Polyamide hot melt adhesive

3.
Polyurethane foam

4.
Polyurethane glue

5.
Polyvinyl chloride board

Another kind of polypropylene honeycomb insulation baffle manufactured by vacuum forming, the structure sequence is:

1.
Polypropylene honeycomb core material

2.
Polyamide hot melt adhesive

3.
Polypropylene film

4.
Polyurethane glue

5.
Polyvinyl chloride board
.

After the bonding is completed, a vacuum forming method can be used to make a shell with appropriate curvature, which can be used as a part of the roof or other parts of the car body
.

2.
Bonding of car interior decorations

There are many types of automotive interior decorations.
In terms of materials, most of them belong to non-metallic materials such as PVC or ABS film, sheet, plate, foam plastic plate, carpet and wood-grain decorative plate
.
The decorative panels with greater force generally use adhesives such as epoxy resin, while the decorative panels with less force generally use hot melt adhesives, acrylic emulsion adhesives or solvent-based adhesives, such as wrapping the edge of the door with plastic sheets.
When decorating the edge of the lining board, hot-melt crimping glue can be used to position it
.

The roof line, noise-absorbing liner and rubber windshield in the car are generally fixed in the car or door slot with neoprene or SBR solvent adhesive; the carpet and floor are generally pasted with PA hot-melt adhesive
.

3.
Welding and sealing of automobile body panels

When the car body is sealed, the entire car is already in the later stage of installation.
Therefore, the construction quality requirements are high, especially for some parts outside the car body, the glue joints are required to be as small and smooth as possible to keep the car body beautiful
.
In order to ensure the construction quality and tightness, two-component rubber adhesives are generally used, so that the glue has a higher initial bonding strength and a faster loss of adhesion speed
.
However, because the two-component component needs to be temporarily prepared during construction, which is more troublesome, hot melt adhesive can be used instead
.
Hot melt adhesives are usually coated with a pressure spray gun with a heating device
.

In addition to the above-mentioned hot melt adhesives, there are also some accessories, such as batteries, sun visors and so on
.