Application Of Fluorine-containing Coatings On The Surface Of Rubber Products
All along, coating difficult to attach to the rubber surface is the first issue to consider in the development of coatings. First of all, the metal surface is high-energy surface, easy to attach, and rubber surface tension <100mn/cm, is a low-energy surface, paint on its difficult to wet and spread. Liquid to the solid surface wetting and spreading, its table tension must be less than solid surface tension to achieve, this will be the surface tension of the coating limit to a certain extent, and the paint surface tension is the base material resin and solvent surface tension of the comprehensive embodiment, must choose the appropriate coating system. Generally speaking, coating resin and rubber substrate structure similar, good compatibility (similar solubility parameters), polar proximity to make the coating resin on the rubber surface good adhesion; Secondly, rubber products are a special substrate, which has high elasticity (low modulus), good flexibility, easy to deformation, and high demand for the matching of coatings, Generally, the relative elongation as the technical index of rubber coating, selection of thermal expansion coefficient and substrate similarity, low modulus, good flexibility of the coating, and will not be due to the climate effects of film shedding, cracking, wrinkle phenomenon, harsh conditions and even requirements of the paint to meet the use of rubber products often occur in large deformation.