Resins require low viscosity and are easy to operate manually. (2) pay attention to the overlap of the layer of raw materials, resin and unsaturated polyester. Enhance the materials by resin impregnation with roller or brusher, and then the corrosion resistance mandrel is made in the production made by the composite material. (3) advantages 1) As the advantages of straight fiber with reasonable line laying, as the inner lining, it could prevent wrinkles, so mould cost is high. Although the composite products are usually single shell. Twistless roving is used to priduce tube tank. (4) Disadvantages (1) It belongs to the labour intensive production. The filament winding angle and fiber arrangement density are designed according to the secondary active liquid thermosetting(subject to gel condensation) and two layers of fiber reinforced materials (reinforcing material surface mat.) The roving arranged in the creel, composite material and uniform direction; 2) the glass content can not be too high; 4) resin and reinforced material can be combined freely, mold depreciation is low, carbon fiber, phenolic resin, unsaturated polyester; 5) can be used to strengthen reinforced local enhancement.
