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Plastic parts selection and use of lubricants

2013-07-03 by wsdchemical

With industrial development, and manufacturers in order to reduce vehicle weight, improve performance, and
increase design flexibility, increasingly popular plastic parts. From the door trim, instrument panels, and hood to
the engine components such as, general passenger car plastic parts which now accounts for about 10% of all.
As plastic parts affect the performance of a key ring, lubricant selection and use is very important.
Reduce friction to reduce wear and noise. For example, in plastic or use a lubricant on the slider, you can
reduce the noise; been applied to a variety of plastic door panels require lubrication, including rail, slider and
roller, window lifter, micro motors and exterior mirrors, etc. ; When the door trim panel assembly to the door before
using a dry film lubricants, car movement can eliminate harsh noise generated, but also can effectively reduce the
use of plastic tape flocking assembly line noise, improve the assembly line production efficiency.
Although lubricants are widely used in automotive metal parts for many years, but the lubricant for plastic parts
for a short time. Choose a different metal parts with lubricant, choose the right lubricant plastic parts much more
difficult, the choice of inappropriate PVC lubricant will cause serious consequences.
The plastic used in a wide variety of automotive parts, each plastic grade and compatibility with different agents.
Compatibility also be affected by additives, fillers, and the molecular size of the plastic. Not only according to the
type of plastic raw materials choose the right lubricant, but also consider the physical properties of plastics. When
choosing a lubricant suitable for plastic parts, plastic, several physical characteristics must be considered. In
general, automotive plastic from the application functions can be divided into two kinds of plastic and structural
plastic, lubricant selection are also different.
Performance Plastics, mainly plastic, to lubricate the parts to be used in the form of materials, sliders and other
auto parts. Typically, various functions of plastic (such as polyamide, polyacetal, etc.) with good oil resistance,
metal parts with many traditional automobile lubricants and greases have better compatibility. However, due to
certain additives within the lubricant will corrode plastic, which requires inspection before use lubricant additive
components inside. In addition, the need for relevant tests, such as immersion test, to verify the actual use of the
lubricant and plastic compatibility. Features and some plastics such as polyacetal and nylon, with self-lubricating
properties, no additional lubricant.
Typically, the transmission means use a lubricant on plastic parts, the use of lubricants can extend its life. Many
metal lubricant additives may react with the metal surface, thereby generating wear-resistant lubricating film.
However, most of the thermoplastic additive is lower than the melting point temperature of a chemical reaction,
but surpasses the plastic surface of the active metal is low, so lubrication conventional additives in the plastic, it
is difficult to take full advantage of the performance. It should be noted that, due to the hardness of the plastic
lower than metal, if the choice of inappropriate solid lubricant, the plastic will cause greater wear due to friction
and breakage. Choose a suitable solid lubricant as an additive manufacturing self-lubricating plastic.


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