The products of environmental protection and high-performance corrosion-resistant materials are mainly vinyl ester resins and special unsaturated polyester resins. Vinyl ester resin is a kind of modified epoxy resin obtained by the reaction of bisphenol A or phenolic epoxy resin with methacrylic acid. It is a thermosetting liquid resin with the characteristics of chemical resistance, mechanical properties and easy processing. Its application scenarios Including environmental protection equipment for power desulfurization and dust removal related to air pollution control, environmental protection equipment for wastewater and waste gas treatment in smelting, semiconductor, petrochemical industry, seawater desalination equipment, electrical and electronic, metallurgy, semiconductor, construction engineering and other industries, such as environmental protection equipment for waste acid reuse Large-scale anti-corrosion storage tank waste gas washing tower, waste acid recovery tower, resin concrete electrolyzer to prevent soil pollution, seawater transportation pipeline, energy-saving emission reduction desulfurization tower for thermal power plant PM2.5 problem, wet electrostatic precipitator, corrosion resistance Exhaust gas exhaust chimney, flue, etc.
Special unsaturated polyester resin is a para-benzene unsaturated polyester resin. Compared with conventional unsaturated resin, it has more excellent high temperature resistance, mechanical properties, and chemical resistance. It is widely used and can be applied to a variety of molding processes. , Such as hand lay-up, winding, casting, etc., can be prepared into pre-promoting type, pre-promoting anti-sagging type and other resins that can meet the needs of different processes.
In addition, special unsaturated polyester resins can also be used in various corrosion-resistant scenarios with vinyl ester resins.
Materials for wind power blades mainly include infusion resin, hand lay-up resin, mold resin, adhesives, prepreg resin for wind power blade beams, pultrusion resin for wind power blade beams, etc. It has excellent mechanical properties, suitable viscosity, and good fiber infiltration And curing characteristics.
The materials for wind power blades of Shangwei New Materials are mainly used in the manufacture of wind power blade shells, girders, webs and blade molds and other components, which can meet the current mainstream MW-level wind power blade molding process requirements.
Wind turbine blades need to have the characteristics of large size, complex shape, high precision requirements, reasonable quality distribution, and good weather resistance. The use of epoxy resin to make wind power blades can make full use of material properties, and optimize the design of basic parameters such as the strength, stiffness and natural frequency of the blades, so as to produce lightweight high-strength blades that meet the requirements of complex shapes and surfaces, and have long service life, It has the characteristics of good maintenance performance, short cycle and on-site construction.
Wind power generation equipment includes 5 plates including motors, blades, gearboxes, control systems, pillars, and towers, of which the cost of wind power blades accounts for 20% -30% of the cost of wind turbines. According to research, 80% of the current domestic blade cost comes from raw materials. Among them, reinforcing fibers, core materials, matrix resins and adhesives account for 85% of the total cost, and reinforcing fibers and matrix resins account for more than 60%. The core materials each account for more than 10%.
So the future revenue of this piece depends on the growth of domestic wind turbines. In May 2019, the National Development and Reform Commission and the Bureau of Energy successively issued a series of wind-level grid-connected policies. The wind power industry will enter the era of bid-on-grid. Although this will help wind power expand its market share, the withdrawal of subsidies and bid-on-grid will lead to lower electricity prices. Compress the profit space of wind turbine blade manufacturers and complete machine manufacturers, and transmit the pressure upstream.
From the perspective of Shangwei's own revenue and net interest rate data, the above pressure has become a reality. The environmental protection and high-performance corrosion-resistant materials are more dispersed due to downstream application fields, and their profits may face greater competition resistance.
In general, if investors are optimistic about the future of the wind power industry, it is better to bet on wind turbine generators or tower manufacturers than bet on wind turbine blade material manufacturers. There are more investment opportunities in the market.