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November 14, 2022
Generally according to the use of the product, the use of the occasion, the degree of processing, and the matching with the top coat to choose the primer. The film thickness of the primer is usually 5-7um.
(1) Epoxy primer has good adhesion to the base material, good water resistance, alkali resistance and chemical corrosion resistance. It is the earliest primer for rolling material, and its flexibility is not as good as other primers.
(2) polyester primer has good adhesion to the substrate, excellent flexibility, more sensitive to wet environment, and chemical resistance is not as good as epoxy primer.
(3) Water-soluble acrylic primer has good adhesion to the substrate, good flexibility, low organic solvent content and low temperature curing.
(4) polyurethane primer has chemical resistance, durability and good flexibility.
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