Plastics are classified into two types: thermosetting and thermoplastic.Among them, thermosetting plastics have high cross-linking density, good solvent resistance and heat resistance, relatively high surface polarity, and wide range of coatings available.For example, unsaturated polyester is called polyester fiberglass. The texture is hard and polar, and there are many coatings that can be used. Thermoplastics are relatively heat-resistant and solvent-resistant. When using coatings, there are more restrictions. Only normal-temperature curing and low-temperature baking coatings can be used.For example, AsB plastics can only be used at room temperature for drying or low temperature baking, and there is a problem of poor solvent resistance.Common plastics to be coated are polyvinyl chloride (including hard and soft), unsaturated polyester, ABS (acrylonitrile, butadiene, styrene ternary copolymer), impact polystyrene (HIPS). ), polyethylene (PE), polypropylene (PP), and the like.Among them, the polarity of polyvinyl chloride, unsaturated polyester and ABs is higher than that of PE and PP, and PE and PP have the characteristics of low polarity, high crystallinity and low surface energy.

Sinograce Chemical products for PP PE upper surface treatment agents, as well as a variety of water-based coatings.Water-based glue.

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