PETG Film is a more comprehensive packaging film. It has good transparency and luster; it has good air tightness and fragrance retention; it has medium moisture resistance, and its moisture permeability decreases at low temperatures. PETG film has excellent mechanical properties, and its strength and toughness are the best among all thermoplastics. Its tensile strength and impact strength are much higher than those of ordinary films; it has good stiffness and stable dimensions, and is suitable for secondary processing such as printing and paper bags. . PETG film also has excellent heat resistance, cold resistance and good chemical resistance and oil resistance. However, it is not resistant to strong alkalis; it is easy to be charged with static electricity, and there is no proper anti-static method, so attention should be paid when packing powdered articles.
Polyester heat shrinkable film is a new type of heat shrinkable packaging material. Because it is easy to recycle, non-toxic, odorless, good mechanical properties, especially in line with environmental protection, PETG has become an ideal substitute for PVC Heat Shrinkable Film in developed countries.
However, ordinary polyester is a crystalline polymer, and ordinary PETG film can only get a heat shrinkage rate of less than 30% after special processing. To obtain a polyester film with a higher heat shrinkage rate, it must also be modified. In other words, in order to prepare a polyester film with a high thermal shrinkage rate, it is necessary to copolymerize and modify ordinary polyester, namely polyethylene terephthalate. The highest thermal shrinkage rate of the PETG film modified by copolymerization can be as high as 70% or more.
The characteristics of heat shrinkable polyester film: it is stable at room temperature, shrinks when heated (above the glass transition temperature), and heat shrinks more than 70% in one direction.
① Body-fitting and transparent, reflecting the image of the product.
②Tightly tighten the packaging, good anti-scattering.
③Prevent rain, moisture, and mildew.
④ No recovery, with a certain anti-counterfeiting function.
Heat-shrinkable polyester film is often used in the convenience food, beverage market, electronic appliances, and metal products. In particular, shrink labels are the main application areas. Because with the rapid development of PETG beverage bottles, beverage bottles such as cola, Sprite, and various juices require PETG Heat-Shrinkable Film to be matched with heat-sealing labels. They belong to the polyester category and are environmentally friendly materials that are easy to recycle. use.
In addition to being used as shrink labels, heat-shrinkable polyester film has also begun to be used in outer packaging of daily commodities in recent years. Because it can not only protect the packaged items from shock, rain, moisture, and rust, but also make the product win users with its beautifully printed outer packaging, and it can well show the good image of the manufacturer. At present, more and more packaging manufacturers use printed shrink films to replace traditional transparent films. Because the printed shrink film can improve the appearance of the product, it is conducive to the advertising of the product, and the trademark brand can have a deep impression in the hearts of consumers.
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