Automotive plastic parts water-based paint detection knowledge analysis!

In the type of automotive material inspection, water-based coatings are mainly used in automotive plastic interior parts, external parts, functional structural parts of the coating. Because water-based coatings have the advantages of stable quality, good compatible, environmental protection and safety, non-toxic harmless, so very suitable for the decoration and protection of automotive lightweight plastic parts. China's water-based coating testing standards for automotive plastic parts for HG/T5180-2017 "Automotive plastic parts water-based coatings", we introduce HG/T5180-2017 on automotive plastic parts water-based coatings testing regulations .
the object of
HG/T 5180-2017 is mainly for automotive airbag cover components, automotive interior plastic parts, automotive exterior plastic parts of the car water-based paint testing, there are two indicators, we must note that a requirement paint in the construction state VOC content is less than 420g/L, after coating process VOC emissions less than 35g/m. Secondly, water-based coatings for lamps, mirror mirrors, wheels, car signs and other plastic parts do not apply to this standard.
detection classification
HG/T5180-2017 divides the water-based coatings of automotive plastic parts into three categories: A, B and C. Class A is mainly used for water-based coatings for automotive airbag system cover components. Class B is mainly used for water-based coatings for automotive interior parts and Class C is mainly used for water-based coatings for automotive exteriors. Of course, Class C paints are also divided into primers, intermediate paints and finishes, while varnishes are divided into color varnishes, primers and varnishes.class
A water-based paint testing items: coating appearance, fineness, status in the container, storage stability, drying time, bending test, low temperature bending test, gloss, scratch test, temperature degeneration, coating anti-wipe performance, water resistance, gasoline resistance, oil resistance, sunscreen resistance, hand cream resistance, moisture-resistant heat performance, anti-artificial climate aging performance,
etc Class B water-based paint testing items: pencil hardness test, drying time, coating appearance, fineness, bending test, impact resistance, attention, rowing test, temperature change resistance, state in the container, coating resistance wipe performance, water resistance, gasoline resistance, oil resistance, sunscreen resistance, hand cream resistance, moisture and heat resistance, anti-climate aging performance;
C water-based paint testing project: as a primer and intermediate paint only need to detect fineness, storage stability, drying time, state in the container, coating appearance, bending test, impact resistance performance, rowing test on it. As a paint, it is necessary to detect fineness, state in container, bending test, impact resistance, storage stability, pencil hardness, fineness, gloss, etc., in which the composite coating to detect freshness, temperature resistance, water resistance, gasoline resistance, oil resistance, sunscreen resistance, hand cream resistance, moisture and heat resistance, resistance to artificial climate aging performance.
above, automotive plastic parts with water-based paint testing related knowledge. It is worth mentioning that automotive plastic parts water-based coatings in the testing, sample preparation is also an important part. Because coating testing usually requires substrates as substrate materials, and different testing projects require different substrate materials. For example, bending test, impact test requires that the sample substrate should be a horse mouth iron plate. Gloss preparation requires glass plates as substrates, and other test projects require abS plastic plates, PP plastic plates, etc. Therefore, when we test the water-based coating of automotive plastic parts, we should also pay attention to the choice of substrate.