Test Background
The scratch resistance test is a routine item for surface quality control of automotive interior and exterior plastic parts, and is also an important indicator for quality control of automotive interior and exterior plastic parts. Due to the different environments, different parts and types of automotive interior and exterior plastic parts, various scratch test methods have been formed. Both the plastic manufacturing industry and the automotive industry are actively looking for better testing and characterization of the scratch resistance performance test methods of polymer materials.
Zhongke Testing Reliability Experiment Center has the capability of reliability testing of various plastics and provides professional temperature resistance testing services for automotive plastic products.
Scope of tests
1. Polycarbonate plastic: lamps, instrument signs, sun visors, window glass, bumpers, etc.;
2. RIM plastic: bumpers, radiator grilles, spoilers, fenders, etc.;
3. Polyethylene plastic: damping materials for fenders, ceilings and doors, trunk mats, air ducts, gasoline tanks, etc.;
4. Polyvinyl chloride plastic: instrument panel cover, car roof lining, rear cover skin, spare tire cover, steering wheel, bumper cover, wire coating, etc.;
5. Polypropylene plastic: heating and ventilation systems, cabins, engine compartments, car bodies, light housings, tool boxes, wire terminals, junction box covers, silencers, etc.;
6. ABS plastic: rear fenders, instrument panels, radio covers, air exhaust pipes, steering wheel horn covers, grilles, rear guards, upper ventilation covers, wheel covers, blinds, brackets, mirror frames, etc.;
Test method
1. Scratch test: Check the degree of damage to the internal product; The surface of the product is rubbed with 000# steel fiber, the surface pressure is 6.5 kPa, the speed is 6 m/min, and the number of frictions is agreed upon by both parties.
2. Washing test: Check the degree of damage to external products due to washing of the car body. Apply muddy water that meets the specified properties on the surface of the product to make the surface evenly moist and let it dry naturally. Roughly remove the mud on the surface of the product with water, then scrub it 3 to 5 times with a sponge, cloth or plastic brush, and finally let the product dry naturally.
Test standard:
QC/T 15-1992 General test method for automotive plastic products
G209 industrial sodium hydroxide
G252 light diesel
G435 gasoline engine oil
GB 484 car gasoline
G534 industrial sulfuric acid
GB 2918 Standard environment for conditioning and testing of plastic specimens
G5671 automotive general potassium-based grease
JB 3979 Automobile steering wheel test method
QC/T 17 General rules for weather resistance testing of automobile parts
SY 4005 No. 4604 synthetic brake fluid
