Polyester heat shrinkable film is a new type of heat shrinkable packaging material.Because it is easy to recycle, non-toxic, tasteless, good mechanical properties, especially in line with environmental protection and other characteristics, polyester (PET) has become an ideal substitute to replace polyvinyl chloride (PVC) heat-shrinkable film in developed countries.
However, ordinary polyester is a crystalline polymer, and ordinary PET film can only get a thermal shrinkage rate below 30% after special processing.In order to obtain polyester films with higher thermal shrinkage, modification is also necessary.In other words, in order to prepare polyester film with high thermal shrinkage rate, it is necessary to copolymerize and modify common polyester, namely polyethylene terephthalate.The highest thermal shrinkage of the copolymerized PET film can be as high as 70%.
Thermal shrinkage polyester film features: it is stable at room temperature, when heated (above the glass temperature) shrinkage, and is in one direction more than 70% thermal shrinkage.
The advantages of heat-shrinkable polyester film packaging are:
The body is transparent and reflects the image of the goods.Tightly bundle packaging, good anti - dispersion.Resistant to rain, moisture and mildew.No recovery, with a certain anti-counterfeiting function.Heat shrinkable polyester film is often used in convenience food, beverage market, electronic appliances, metal products, especially shrinkable label is its most important application field.Because with the rapid development of PET beverage bottles, such as Coke, Sprite, a variety of fruit juice and other beverage bottles need PET heat shrinkable film and supporting the heat seal label, they belong to the polyester class, is environmentally friendly materials, easy to recycle and reuse.
In addition to being used as shrink labels, heat-shrinkable polyester film is also beginning to be used on the outer packaging of household goods.Because it can not only protect the packaging goods from impact, rain, moisture, rust, and can make the product to print exquisite packaging to win users, at the same time, it can be a good display of the manufacturer's good image.
More and more packaging manufacturers are using printed shrink film to replace the traditional transparent film.Because the printing shrink film can improve the appearance of the product grade, is conducive to the product advertising, can make the trademark brand in the hearts of consumers have a deep impression.
Exceptions, can also be used as: packaging with polyester film, gilding with polyester film, holographic polyester film, holographic laser anti-counterfeiting trademark special polyester film, capacitor with polyester film, black polyester film, polyester matt film, PET polyester torsion conjunctival film.
