Effect of Plastic Surface Characteristics on Epoxy Floor Coating

Plastics are generally divided into two major categories, thermoplastic and thermosetting. Thermoplastics are solids at room temperature and, when heated to a certain temperature, become plastic bodies with a certain degree of fluidity. Epoxy-resistance paints for thermoplastics have poor solvent properties; under certain conditions, thermosetting plastics are crosslinked and cured by chemical reactions to produce bulky macromolecules with good heat resistance and insoluble in organic solvents.

Plastic products and rubber products are low surface energy substances, and their surface tension is generally less than 100mN/cm, which is not conducive to the epoxy floor paint coating on its surface wet spreading and adhesion; plastic products are mostly crystalline polymer materials, with or without crystallization The adhesion of the coating to the epoxy floor paint is extremely important, and the high crystallinity makes it difficult to attach the epoxy floor paint; the volume resistivity of the thermoplastic is generally greater than 10 ohms. Plastic surface with static electricity is easy to absorb dust and other impurities, affect the quality of epoxy floor paint film. Due to these characteristics of plastic products, the following three kinds of coating defects are more likely to be caused in plastic coating.

Poor adhesion, vortex, shrinkage. The reason for these defects is that because of the small surface tension of the plastic, the coating is difficult to wet and spread; second, most of the plastic is a crystalline polymer material, and the adhesion of the high-crystallinity epoxy floor paint is poor. Coarse coating, pinholes. Due to the plastic surface characteristics caused by the coating film roughness, pinholes, mainly due to the plastic surface with static and easily adsorbed impurities caused.

Epoxy floor paint coating, floating color, plastic surface deformation. This phenomenon generally occurs in the surface coating of thermoplastics. The main reasons are: the solubility parameters of epoxy floor coatings are not compatible with the solubility parameters of plastic surfaces, and the solvency of coatings is excessively dissolved due to the surface of ambassador plastic products. of.