High Quality and Best Price Polyester Pet Film

PET film is a kind of packaging film with comprehensive performance. It has good transparency and gloss; good air tightness and fragrance retention; moderate moisture resistance, and the moisture permeability decreases at low temperatures. PET film has excellent mechanical properties, its strength is the best among all thermoplastics, and its tensile strength and impact strength are much higher than ordinary films; and it has good strength and stable dimensions, suitable for secondary processing such as printing and paper bags. . PET film also has excellent heat and cold resistance and good chemical and oil resistance. However, it is not resistant to strong alkali; it is easy to carry static electricity, and there is no appropriate anti-static method, so attention should be paid when packaging powdered items.

In addition to the excellent physical and mechanical properties of ordinary polyester films, the film also has excellent optical properties, such as good transparency, low haze and high gloss. It is mainly used for high-grade vacuum aluminized products, the film has a mirror surface after aluminized, and has a good packaging decoration effect; it can also be used for laser anti-counterfeiting base film, etc.

In order to solve the problem of heat sealing, through the modification of PET resin and the use of A/B/C three-layer structure die, a three-layer co-extruded heat-sealing PET film has been developed. This heat-sealing PET film Because there is a heat-sealable layer on one side, it can be directly heat-sealed, which is very convenient to use. Heat-sealable PET film can be widely used in the fields of packaging and card protection films of various commodities.

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 for polyvinyl chloride (PVC) heat shrinkable film in developed countries.

However, ordinary polyester is a crystalline high polymer, and ordinary PET film can only obtain a thermal shrinkage rate of less than 30% after special processing. To obtain polyester film with higher thermal shrinkage, it must also be modified. That is to say, in order to prepare a polyester film with a high thermal shrinkage rate, it is necessary to carry out copolymerization modification of polyethylene terephthalate, a common polyester. The maximum thermal shrinkage rate of the copolymerized PET film 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. The advantages of heat shrinkable polyester film packaging are: ①The body is transparent and reflects the image of the product. ② The packaging is tightly bundled, and the anti-scattering property is good. ③ Rainproof, moistureproof and mildew proof. ④No recovery, there is a certain anti-counterfeiting function. Heat shrinkable polyester film is often used in convenience food, beverage market, electronic appliances, metal products, especially shrink label is its main application field. Because with the rapid development of PET beverage bottles, beverage bottles such as Coke, Sprite, and various juices need PET heat shrinkable films to be matched with them as heat-sealing labels. They all belong to polyester, which are environmentally friendly materials and are easy to recycle.

In addition to being used as shrink labels, heat shrinkable polyester films have also been used in the outer packaging of daily commodities in recent years. Because it can not only protect the packaged items from impact, rain, moisture and rust, but also make the product win users with beautifully printed outer packaging, and at the same time it can well show the good image of the manufacturer. At present, more and more packaging manufacturers use printed shrink film to replace the traditional transparent film. Because the printing shrink film can improve the appearance of the product, it is conducive to the advertising of the product, and can make the trademark brand have a deep impression in the minds of consumers.