Coating general knowledge: polyurethane coating performance requirements for wind turbine blades

Core tip: the main performance requirements of blade coating are as follows: (1) Helicopter raindrop test: high-speed rotating propeller rain point impact test, this test can not be carried out in China, only in foreign countries （2） Weather resistance: the epoxy blade is easy to be powdered under the direct sunlight, and will even break in the high-speed rotation when reaching a certain extent Therefore, as a protective coating on the blade surface, the blade coating has higher requirements for weather resistance naturally (3) Flexibility: the high-speed rotating blades are subject to large deformation, so the coating needs certain flexibility to prevent the paint film from cracking Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Home of coatings: the main performance requirements of blade coating are as follows: (1) helicopter raindrop test: high-speed rotating propeller rain point impact test, which can not be carried out in China at present, can only be tested abroad (2) Weather resistance: epoxy leaves are easy to be powdered under direct sunlight, and even break in high-speed rotation when reaching a certain degree Therefore, as a protective coating on the surface of the leaves, the requirements for weather resistance are naturally high (3) Flexibility: the high-speed rotating blades are subject to large deformation, so the coating needs certain flexibility to prevent the paint film from cracking and falling off (4) Wear resistance: the rotating blade is impacted and scratched by the atmosphere, dust and even gravel at high speed, especially the edge of the blade, which requires higher wear resistance (5) Adhesion: the primer shall have good adhesion to the FRP blade (6) Heat and humidity resistance: windmill is usually installed in the sea, grassland, mountains and other humid environment (7) Construction performance: ① dry blade coating can be baked at low temperature if possible, but some of them can only be dried by themselves due to the restrictions of conditions; ② activation period roller coating or high pressure airless spraying requires that the viscosity of the coating cannot be greatly increased during the coating process; ③ thick coating - the dry film thickness of the primer and finish of blade coating is generally 80-120 μ m; ④ Burnishing - there are many gaps on the blade surface, especially the edge, which is usually polished and filled with putty after the primer is applied; ⑤ low VOC - due to the environment of blade coating, low VOC is not only environmentally friendly, but also conducive to the health of the constructors Based on the above performance requirements, the current domestic blade coating system mainly includes polyurethane coating, polyurea coating and silicon fluorine coating Among them, the silicone fluorine coating is usually made into two-component, with the help of crosslinking with isocyanate to form polyurethane structure coating Among these three coating systems, polyurethane coating is the most commonly used and most accepted in the market Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,