raw materials and technical requirements of glass fiber reinforced resin purification tower production. Resin used in raw material resin manufacturing tower structure layer could be unsaturated polyester resin, epoxy resin, vinyl resin according to relevant requirements. According to the requirement by the supply and demand parties, both sides can choose other suitable winding resin after consulation. The resin used for corrosion resistant layer of the tower could be vinyl resin and epoxy resin according to relevant requirements. In accordance with the requirements of usage, they may also choose other resins with medium corrosion resistance after consultation. Unsaturated polyester resin should comply with the provisions of GB8237 and other resins shall comply with the corresponding standard. Generally speaking, resin should not contain pigments, dyes, fillers or colorants. Exception in the following circumstances: A) The materials we used does not interfere with the visual inspection of product quality and thixotropic agent does not affect corrosion resistance requirements of products ; b) if both parties agree, pigment, dye or colorant can be added into resin; c) if both parties agree, ultraviolet absorbent or flame retardant can be added into resin.
