POE small film drenching machine

POE (Polyolefin Elastomer) : A high value-added synthetic resin with rubber and plastic properties made using LG Chem's original metallocene catalytic technology. Used for solar film, automobile bumper material, sole shock absorbing layer, wire and cable cladding material. POE: polypropylene. Odorless, tasteless and non-toxic. It is one of the lightest resins commonly used. Excellent mechanical properties, good heat resistance, continuous use temperature up to ll0-120℃. Good chemical stability, except strong oxidant, and most chemicals do not react. Excellent water resistance and electrical insulation. But easy to aging, low temperature impact strength is poor. Application fields are used in the production of injection molding products, film, pipe, plate, fiber, coating and so on. Widely used in household appliances, automotive, chemical, construction, light industry and other fields. Used in solar photovoltaic power station, building glass curtain wall, automobile glass, functional shed film, packaging film, hot melt adhesive and other industries. The advantages and disadvantages, production process and application scope of POE film Greatly reduced PID, water vapor barrier, high volume resistivity, weather resistance High price 99%POE resin + crosslinking agent + viscosifying agent + anti-aging agent POE pretreatment, twin-screw extrusion, and winding are added N-type battery components and dual-glass components, complementary fishing light and agricultural light scenarios Development prospect of photovoltaic film Photovoltaic film technology route is stable, there is no product replacement risk. Pv has been noted for its rapid technological progress and rapid cost reduction. Technological changes are occurring mainly in the major industrial chain links (polysilicon, silicon wafers, cells, modules). In recent years, several major changes have taken place, such as the cold polysilicon connection. Hydrogenation replaces thermal hydrogenation, single crystals replace polycrystals in silicon wafer links, and PERC units in cell segments are increasing. In the future, new technological changes such as heterojunction batteries are still in the pipeline. Each technological change will greatly boost the industry, but it will also have a serious impact on existing structures. Compared with the main industry chain, as an auxiliary material of photovoltaic modules, the technical route of the film is relatively stable. Regardless of changes in battery module technology, the demand for adhesive films remains stable and will not be replaced in the foreseeable future. Even if the product is upgraded, it will mostly happen in existing systems. For example, upgrade from a normal transparent EVA to a white EVA or POE. Photovoltaic film materials in the photovoltaic industry is mainly used to do what, how is the domestic situation? "Qualified PV modules need to be able to maintain 80% of their initial maximum power output after 25 years of outdoor operation, and also be able to resist impact effectively. Therefore, in order to extend the service life of the photovoltaic modules, packaging materials are added to the modules to protect them." Jiangsu Institute of Technology, School of materials engineering professor Ou Junfei said. A typical photovoltaic module consists of a solar cell, a backplane, photovoltaic glass, a junction box, a frame, and packaging materials. The packaging adhesive film material is located between the photovoltaic glass and the solar cell, which can bond the solar cell, the copper-tin welding strip, the back plate and the photovoltaic glass together, and is the key component of the photovoltaic module. "The vinyl vinyl acetate copolymer (EVA) encapsulation film in photovoltaic cells is a thermosetting and viscous film." Changzhou Trina Solar Co., LTD. Related experts introduce, because EVA film has special advantages in adhesion, durability, optical properties, etc., so it is widely used in photovoltaic components and a variety of optical products. The single glass photovoltaic module with plastic back and glass front mainly uses EVA encapsulation film. Due to its non-viscosity at room temperature, it can be fused and cross-linked under certain conditions, and become completely transparent. After bonding with glass, it can improve the transmittance of glass and play a role in anti-reflection. For double-glass photovoltaic modules with both sides of glass, POE film is a commonly used packaging material in the market at present. Compared with EVA film, POE film has better safety and aging resistance. But this material is 30% - 50% more expensive than EVA film. "The thickness of the two-glass photovoltaic module glass has been reduced from 2.5 mm to 2.0 mm and is expected to be reduced to 1.6 mm in the future." European Junfei said that with the decrease of the glass thickness of the double glass photovoltaic module, EVA film can also be sealed on the double glass module frame, the future EVA film will also be widely used in the double glass photovoltaic module. The EVA raw material used for the production of photovoltaic encapsulation film requires a VAc (vinyl acetate) content of more than 28%, which is mainly produced by the kettle method at present. With the rapid development of China's photovoltaic market, EVA film market has also grown rapidly. Before 2013, EVA film has been monopolized by foreign countries, and now domestic enterprises occupy more than 90% of the domestic film field, realizing domestic substitution. At present, the domestic Beijing organic chemical plant, Huamei polymerization, Lianhong, Ningbo Formosa Plastics, Shanghai Petrochemical, Yangzi Petrochemical and other use the reactor type process of EVA film production have a place. Jiang Susirbang is the only enterprise in China that can produce EVA film by tubular method. Since its launch in September 2019, the products have been recognized by the market. The above is an analysis of the roles, advantages and disadvantages and development prospects of EVA film and POE film necessary packaging materials for photovoltaic modules. In the view of relevant experts, there is still a certain gap between the raw materials of EVA film production in China and the international advanced level. In the next few years, EVA film raw materials will be imported from Singapore, South Korea and other neighboring countries to make up for the demand of the photovoltaic market.