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With the vigorous development of the automobile industry, various raw materials for manufacturing automobiles have also developed and replaced rapidly, and more and more automobile parts have begun to use modified plastics to replace metal parts
.
PP has been widely used in automobiles due to its low density, high cost performance, excellent heat resistance, chemical resistance, rigidity, easy molding and recycling
.
Microcellular foaming refers to a thermoplastic material as the matrix, and the intermediate layer of the product is densely covered with closed pores with a size ranging from ten to tens of microns
.
With the development of lightweight automobiles, the selection of PP foam materials has become an important way to reduce the weight of automobiles.
At present, its application in automobile interiors is also increasing.
Among them, PP foam materials are used in various automobiles.
The ratio is 45% for cars, 20% for trucks and construction machinery vehicles, and 35% for passenger cars and commercial vehicles
.
PP foam materials for automobiles are mainly chemical micro-foam materials
.
Microcellular foaming mainly includes injection molding microfoaming, blow molding microfoaming and extrusion microfoaming, etc.
Injection molding microfoaming is suitable for various interior and exterior automotive trim parts, such as body door panels, tailgates, air ducts, etc.
; Micro-foaming is suitable for sealing strips, ceilings, etc.
; blow-molding micro-foaming is suitable for automobile air ducts,
etc.
The use of micro-foaming technology can reduce the quality of PP products by about 10% to 20%.
Compared with traditional materials, the weight of parts can be reduced by up to 50%, the injection pressure is reduced by about 30% to 50%, and the clamping force is reduced by about 20%.
%, the cycle period is reduced by 10% to 15%, and at the same time, it can improve the energy saving of automobiles.
Compared with traditional materials, it can achieve up to 30% energy saving, and it can improve the warpage deformation of products and make the design of products and molds more flexible
.
Radiation cross-linked PP high-foaming sheet has good mechanical properties.
As a car roof, it can reduce the quality of the car.
At the same time, it can also be used for the interior parts of the car, which is beneficial to the lightweight of the car
.
door trim panel
door trim panelJohnson Controls was one of the first users in Europe to use the MuCell process.
With its rich experience, the company designed a new door trim panel for the Mercedes W212 4-door sedan, which was put into production in 2009
.
According to reports, this product, which won the SPE Award, was successfully designed based on the application of the MuCell process
.
engine cover
engine coverFord micro-foam engine cover: The MuCell micro-foam injection molding technology is used to fill the air bubbles during the molding process of the parts to form a very fine honeycomb structure, which not only saves plastic materials, but also reduces the weight, and will not affect any of the parts.
performance
.
Currently used models are: C-MAX, Grand C-MAX, S-MAX, Mondeo and Galaxy,
etc.
In summary, polypropylene micro-foamed materials are widely used in the automotive field, but need to pay attention:
1.
Micro-foaming is a technology verified by different products in various industries around the world, and has a wide range of markets, but its application in China is still new
.
2.
Micro-foaming can provide higher quality (reduced deformation, improved flatness, roundness and dimensional stability, no shrinkage marks) and lower cost (reduced weight, molding cycle and molding tonnage, more material-saving product design )
.
3.
Micro-foaming can create new business opportunities - high-end applications and cost savings
.
4.
Not all products are suitable for micro-foaming technology, and it is necessary to cooperate to find suitable products
.
