⑴If 5μm dust is mixed into the paint layer, the flaws caused by the dust can be seen with the visible eye. In order to ensure the paint quality of the car surface, the automobile manufacturer must use a large number of air filters to remove the dust caused by painting and baking product lines.

⑵The paint spraying line is a very long tunnel, where the vehicle travels along the tunnel. The top of the tunnel is covered with a thick layer of non-woven fabric, which serves both as a damping and filtering material. The efficiency specification of this layer of damping material is roughly equivalent to F5, but the filtering efficiency is not important here. The important thing is that the material itself should be uniform and not shed hair. During transportation, storage, processing, and installation, attention should be paid to not letting dust contaminate the material.

⑶The main filter of the spray painting line is located above the damping layer, and it is this level of filter that determines the cleanliness level of the spray painting environment. The efficiency specifications of this level of filter are F5-F7 bag filters, and most of them use universal products with specifications of 592mm X 592mm (24 "X 24").

⑷In the baking production line of the painting workshop, the incoming air needs to be preheated to around 200 ° C. Due to the possibility of dust generation in the heating device, the air filter should be placed at the hot air end, which requires the filter to be able to withstand high temperatures of 200-250 ° C for a long time. The efficiency specification of the filter here is generally F7-F8 high-temperature resistant seperator filter.

⑸The filter used in the painting shop is particularly taboo against silicone, because if the metal surface is stained with a little silicone, the paint layer will bubble, and the automobile factory expressly prohibits any silicone.

⑹For a medium-sized paint shop, the annual filter consumption value is between 2 million and 4 million CNY.