What is the production process of POF heat shrink film?

2024-04-16 14:54:34 Zhejiang Zhongcheng Packing Material Co., Ltd Viewd 56

As a professional manufacturer of POF in heat shrink film, let's explore together!

POF (Polyolefin) heat shrink film, abbreviated as environmentally friendly POF shrink film, is a widely used and rapidly developing new type of environmentally friendly shrink film in the world today. The product adopts advanced three-layer and five-layer co-extrusion technology for biaxially stretched polyolefin shrink film production, featuring high transparency, high shrinkage rate, high toughness, high heat sealing performance, anti-static properties, excellent cold resistance, and safety reliability.

POF heat shrink film serves as a substitute for traditional shrink film and is mainly used for packaging both regular and irregularly shaped products. With its high transparency and good gloss, it vividly displays the appearance of products, enhances tactile sensation, and reflects the product's grade, making it widely popular.

As for its production process, POF heat shrink film is made from linear low-density polyethylene (LLDPE) and polypropylene (PP) through co-extrusion blown film processing. It mainly employs the double-bubble method, also known internationally as the Prandi method. This involves melting the raw materials through different extruders, forming the primary film through specially designed co-extrusion dies, followed by rapid cooling, and finally obtaining the product through heating, secondary inflation, and stretching.

The advantages of POF shrink film include energy saving, high shrinkage rate, high gloss transparency, and strong tear resistance. This product has overturned the limitations of traditional packaging films and is highly welcomed by the market.

Heat shrink film not only reduces packaging production costs, transportation costs, and packaging volume but also, due to its high transparency and good printing performance, quickly catches consumers' attention and meets their demands in the fiercely competitive market.

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