With the continuous progress of science and technology, the variety of waterproof coatings is increasing, but so far, polyurethane waterproof coatings are still regarded as the best functions in countries around the world. Low temperature resistance, high tensile strength, large elongation, large changes in hardness and modulus, good adhesion, wear resistance, oil resistance, corrosion resistance to chemical media, etc., are widely used in waterproofing in various fields.
Polyurethane waterproof coatings have been produced and applied in China for more than 20 years. Since the "Ninth Five-Year Plan" period, it has always been a product promoted by the Ministry of Construction to the construction industry. In order to meet the market demand for polyurethane waterproof coatings and improve the waterproof coating system, Beijing Dongfang Yuhong Waterproof Engineering Co., Ltd. has formed a series of waterproof coatings with low, medium and high performance grades. The production line has produced nearly 10,000 tons of single- and two-component polyurethanes and spray-type polyurea coatings since it was put into production. The products are used in kitchen and toilet rooms and balconies, basements, swimming pools, sewage treatment tanks, subways, and high-speed highways in industrial and civil buildings. Waterproofing in railways and other areas and parts. The author presided over the construction of the production line, and was in charge of production since the production line was put into production. Several years of production practice proved that the production line has a complete system, functions for producing multiple products, core equipment and controls to meet the production conditions of high-quality coatings. This article focuses on the production line design, operating conditions, and the main factors that affect paint production and performance.