PET shrink packaging box label

Ordinary polyester is a crystalline polymer, and ordinary PET film can only achieve a thermal shrinkage rate of less than 30% after special processing. To obtain polyester films with higher thermal shrinkage, modification is also necessary. That is to say, in order to prepare polyester films with high thermal shrinkage, it is necessary to copolymerize and modify ordinary polyester, namely polyethylene terephthalate. The highest thermal shrinkage rate of PET film modified by copolymerization can reach over 70%.

The characteristics of heat shrinkable polyester film: it is stable at room temperature, shrinks when heated (above the glass transition temperature), and undergoes over 70% thermal shrinkage in one direction. The advantages of heat shrinkable polyester film packaging are: ① It is transparent and reflects the product image. ② Tight packaging with good anti scattering properties Rainproof, moisture-proof, and mildew proof. ④ No recoverability, with certain anti-counterfeiting function. Heat shrinkable polyester film is commonly used in the convenience food, beverage market, electronic appliances, metal products, especially in shrink labels, which is its main application field. With the rapid development of PET beverage bottles, such as cola, Sprite, various fruit juices, etc., PET Heat Shrink Film is needed to match them for heat sealing labels. They both belong to the polyester class and are environmentally friendly materials that are easy to recycle and reuse.

Heat shrinkable polyester film has been used not only as shrink labels but also on the outer packaging of daily necessities. Because it can protect packaging items from impact, rain, moisture, and rust, while also winning users with beautifully printed outer packaging. At the same time, it can effectively showcase the manufacturer's good image. More and more packaging manufacturers are using printed shrink film instead of traditional transparent film. Because printed shrink film can enhance the appearance grade of products, facilitate product advertising, and create a deep impression of the trademark brand in the minds of consumers