◆Automotive plastic parts and damping parts coatings Automotive plastic parts coatings are similar to other metal parts. They are also classified as primers, base coats, varnishes or top coats (top coats are used instead of base paint/varnish systems). The primer can be applied directly to the surface of a surface treated plastic substrate, typically requiring a film thickness of about 30 μm to completely cover the flow marks and defects on the surface of the part. The epoxy-polyamide two-component plastic primer is mainly used on the front and rear bumpers of automobiles. Since the bumper is generally polypropylene, a small amount of chlorinated polypropylene is added as a base material to improve the primer. Adhesion. There are also solvent-based single/two-component polyurethane primers for automotive bumpers and other plastic parts. The base paint is generally used in the same manner as the base paint component for metal parts, and the film thickness is generally 10 to 15 μm. The varnish is mainly a solvent-based two-component polyurethane system, which combines polyacrylate and polyester with polyisocyanate, and the paint film can achieve the required flexibility, and also has high chemical resistance and good mechanical properties. The varnish film size is generally required to be about 35 μm to provide color saturation and to achieve a gloss consistent with the body. The plastic monochrome finish also uses a two-component polyurethane system to achieve the same appearance and performance requirements as the body. The baking temperature of various automotive plastic coatings is around 80 °C.
As China's automobiles, especially cars, develop to a higher level, higher requirements are placed on the performance of thermal insulation, shockproof and sound-absorbing coatings. This is used to improve airtightness, reduce vibration, reduce noise, improve car comfort and corrosion resistance between body gaps. The undercoat is on the underside of the underbody, especially on the surface of the wheel cover and fender that are susceptible to stone attack. It is coated with a wear-resistant coating of 1 to 2 μm thick, which can improve the impact resistance and resistance of the underbody components. Erosive, improve its corrosion resistance and the life of the car. Anti-sonic coatings are coatings designed to reduce the noise generated by vibration. In recent years, automobile damping coatings generally use a solvent-free PVC series coating made of polyvinyl chloride resin (ie, PVC) as the main base material, and the solid content can generally reach 100%. This PVC coating has good hardness, elongation, shear strength and tensile strength, and can well meet the performance requirements of damping coatings.
◆The common coatings and matching materials for plastic parts coatings have excellent anti-corrosion properties on plastic surfaces and do not require anti-corrosion treatment. Therefore, the purpose of plastic coating is mainly concentrated on the decorative function. In the past, pigments were added in the masterbatch of plastics. The method, with the increasing decoration requirements of people, can no longer meet the requirements of use, and therefore requires more secondary surface processing to achieve the following purposes: to make the surface of plastic products have a variety of colors; cover the production process Scratch and other defects; improve the texture of the plastic surface, such as manufacturing metal and wood; improve the mechanical properties of plastic products, such as hardness, scratch resistance, etc.; improve the chemical resistance of plastic products, such as weather resistance, Flame retardancy, solvent resistance, etc.; improve physical properties of plastic surfaces, such as electrical conductivity, antistatic properties, etc.; printing text, graphics, trademarks, etc.
Please feel free to contact us if you have any problems.
Xiamen LFT Composite Plastic Co.,Ltd
Candy Hu
Email: candyhu@lfrtplastic.com
Tel : 0086-186-5906-9962 (wechat/whatsapp)
Skype:candy328520
Address : No. 27,Hongxi Road, Ma xiang town, Xiang 'an district, Xiamen(361000),China
