What do blown film and calendered film refer to?

Guangzhou Zanchen New Material Technology Co., Ltd.

Blown film and calendered film are two different plastic film manufacturing processes. Look at them specifically:

Blown film: also known as blown film, is made by extruder to melt plastic and extrude it into a tube, then pass compressed air to make it expand into a bubble, and then after cooling and flattening treatment and made of film. The film produced by this method has a better longitudinal and transverse performance balance, less investment in equipment, and film thickness uniformity. However, the surface is relatively slightly rough because it is blow molded in the air.

Calendered film: also known as pressed out film or cast film, is the molten plastic material through the slit type mold directly calendered to the cooling rollers and rapid cooling and become. The film made by this process has a smooth, bright surface, and its flatness and thickness uniformity are usually superior to that of blown film. Calendering typically performs better in product performance metrics such as tensile strength and tear strength.

In summary, when selecting a Solar EVA film , calendered films may be preferred if higher surface smoothness and optical properties are required, while blown films may be considered if cost is sensitive and good uniformity is needed.

Zanchen New Material

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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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