Resin for wind turbine blades
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The resins used in wind turbine blades include unsaturated resins and epoxy resins. Could you tell us what types these resins are generally, and what their advantages and disadvantages are? What are the shortcomings of domestically produced resins compared to those from abroad? What advantages do the newly developed vinyl resins have over the previous two? The topics I mentioned might be a bit broad; let’s talk about whatever everyone has in mind. :handshake
Let me start by offering my own preliminary thoughts: depending on the construction methods used, epoxy resins also exhibit differences in their corresponding technical specifications. 1: For the common hand-laying process, the viscosity of epoxy is generally around 600. Different curing agents can be used as needed to control the curing time, which ranges from 40 minutes to 120 minutes. A glass transition temperature of around 55 degrees is usually sufficient. 2: For the vacuum infusion process, the viscosity of epoxy is generally around 300. The curing time remains as mentioned above. The advantage of lower viscosity is better penetration, which reduces the likelihood of defects. Additionally, attention should be paid to the heat release curve of the resin – manufacturers generally do not provide this information to users; if the heat release is too high, for example if the temperature rises above 70 degrees instantly, the product is prone to deformation. Pay attention to the environmental friendliness of the resin – epoxies containing irritating substances can cause allergies in those who handle them. Also pay attention to the elastic modulus of the resin; the higher the elastic modulus, the better the performance of the material after curing. Of course, if the product requires some degree of bendability, it is possible to choose a resin with a lower elastic modulus. For applications that require high temperatures – above 100 degrees – post-curing is generally necessary. Even for high-temperature resistant epoxy resins, without post-curing, their TG value remains the same as that of ordinary epoxies.
Unsaturated resins are inexpensive; they are a relatively traditional type of resin used in fiberglass
Resins are now so widespread~~~ They will affect the lives of several generations……
Unsaturated polyester resins are generally used in small wind power equipment with blade lengths of 15 meters or less. Epoxies are mainly used in large wind power equipment over 15m in size.
How could it be resin? I always thought they were blades made of steel. If resin-based medical reforms are used, they will also be of the epoxy type.
Our company’s vinyl product is under development and will soon be launched in the domestic market. It has historical significance.
Hehe, with wind power and thermal power being popular now, wind power coatings are also becoming popular