What is EVA resin?

Guangzhou Zanchen New Material Technology Co., Ltd.

EVA resin is a copolymer, made by copolymerising ethylene and vinyl acetate monomers. The following is a detailed introduction to EVA resin:

1, Structure and performance: The structure of EVA resin contains ethylene chain segments and vinyl acetate (VA) monomer, the latter provides EVA with polar short branched chains, these chains change the crystalline state of the polymer, giving EVA better flexibility and elasticity.

2, The main purpose: because of its excellent performance, EVA resin is widely used in many fields, such as shoe industry, photovoltaic film, toy manufacturing, packaging materials. In the shoe industry, EVA is used in the production of medium and high-grade travel shoes, hiking shoes, etc., which is favoured because of its lightness and comfort.

3, Processing methods: EVA resin can be processed through a variety of moulding methods, including injection moulding, extrusion, blow moulding, foaming, etc., to make a variety of shapes and properties of the product.

In summary, EVA resin is a multifunctional synthetic material with a wide range of application prospects and practical uses.

Zanchen New Material

EVA resin in the field of photovoltaic EVA film application

EVA resin in the field of photovoltaic EVA film is mainly used in the photovoltaic glass, cell, backsheet adhesive together, at the same time play a role in protecting the cell and the role of air insulation. The following are its detailed applications:

1, Bonding principle and material composition: EVA photovoltaic film raw materials mainly include EVA resin, crosslinking agent, silane coupling agent and other modifiers. These materials are stirred in the mixer and left to stand for a period of time, and then placed in the adhesive film production line, casting and extrusion into a molten state adhesive film.

2, Aging resistance: Although EVA adhesive film has good light transmission properties and adhesive properties, but long-term exposure to outdoor environments may occur in yellowing and browning, as well as due to degradation leading to a decline in adhesion, which in turn occurs in the delamination or blistering phenomenon.

3, Thermal performance analysis: the thermal performance of EVA film can be identified by DSC (Differential Scanning Calorimetry), TGA (thermogravimetric analysis) and other methods to provide data and theoretical guidance for the lamination process.

4, Market position: Although EVA photovoltaic film dominates the market, but POE adhesive film due to its better aging resistance, low water vapour transmission rate and anti-PID performance, the market share is gradually rising, especially in the double-glass, N-type photovoltaic module applications.

In summary, the application of EVA resin in photovoltaic EVA film is multifaceted, including not only its basic bonding and protection role, but also involves the material's aging resistance, thermal performance analysis and market competition. With the development of technology and changes in market demand, the performance of EVA adhesive film is also being improved to meet the needs of the photovoltaic industry for high efficiency and stability.

What is photovoltaic EVA film?

photovoltaic EVA film is a thermoset adhesive film material based on ethylene vinyl acetate copolymer (EVA). This material is widely used in photovoltaic module encapsulation due to its excellent adhesion, durability and optical properties. The following is a professional introduction to photovoltaic EVA film:

1, Product properties: photovoltaic EVA film is known for its high transparency and strong adhesion to a wide range of interfaces, including but not limited to glass, metal and plastics such as PET, and its durability is demonstrated by its ability to withstand high temperatures, humidity and ultraviolet radiation and other environmental factors.

2, Production characteristics: in the production process, EVA adhesive film modified by adding a variety of additives, and through the melt processing and moulding, with good processing performance. Despite its ample supply and low cost, the anti-PID (Potential Induced Degradation) performance is relatively poor.

3, The current market situation: with the gradual release of new domestic EVA production capacity, photovoltaic EVA film production capacity is mainly concentrated in China. At the same time, POE (polyethylene - polyolefin elastomer) film due to its better aging resistance, low water vapour transmission rate and anti-PID performance, gradually occupy a larger share of the market, especially for double-glass, N-type photovoltaic modules.

4, Storage conditions: photovoltaic EVA film is easy to store, when stored at room temperature, its adhesion will not be affected by humidity and water absorption film.

In summary, photovoltaic EVA film plays a vital role in the photovoltaic industry, and is one of the key materials indispensable to the encapsulation process of photovoltaic modules.

CORPORATE STRENGTHS

Guangzhou Zanchen New Material Technology Co., Ltd. is a pioneer in the field of solar film innovation, integrating scientific research, design, production and sales. Our industrial and trade enterprise is located in Xinhua Industrial Park, Yingbin Avenue, Huadu District, Guangzhou City, and has rich professional experience in the industry. The company has offices in Zhejiang and Chengdu, specializing in the R&D, production and sales of polyurethane (TPU) films, EVA solar photovoltaic films, and EVA glass films.

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