PET film

PET film is a film material made from polyethylene terephthalate, which is extruded into a thick sheet and then biaxially stretched. Meanwhile, it is a kind of polymer plastic film, which is increasingly favored by consumers because of its excellent comprehensive performance. It is a colorless, transparent and glossy film with excellent mechanical properties, high rigidity, hardness and toughness, puncture resistance, friction resistance, high and low temperature resistance, chemical resistance, oil resistance, air tightness and good fragrance retention, and is one of the commonly used permeability resistance composite film substrate.

PET film is a kind of packaging film with relatively comprehensive performance. PET film has excellent mechanical properties, its toughness is the best among all thermoplastics, and its tensile strength and impact strength are much higher than general films; it has good stiffness, stable size, and is suitable for secondary processing such as printing and paper bags, etc. PET film also has excellent heat resistance, cold resistance and Good chemical resistance and oil resistance. However, it is not resistant to strong alkali; it is easy to carry static electricity, and there is no proper method to prevent static electricity, so attention should be drawn to it when packaging powdery goods.

PET film classification

PET High Glossy Film

In addition to the excellent physical and mechanical properties of ordinary polyester film, 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 is mirrored after aluminizing, which has good packaging decoration effect; it can also be used for laser laser anti-counterfeiting base film, etc. High gloss BOPET film has large market capacity, high added value and obvious economic benefits.

PET transfer film

Transfer film, also known as thermal transfer film, is characterized by high tensile strength, good thermal stability, low heat shrinkage, flat and smooth surface, good peelability, and can be used repeatedly. It is mainly used as the carrier of vacuum aluminizing, that is, after the PET film is aluminized in the vacuum aluminizing machine, it is coated with adhesive and laminated with paper, and then the PET film is peeled off, and the aluminum molecular layer is transferred to the surface of cardboard through the adhesive effect, forming the so-called aluminized cardboard. The production process of aluminized cardboard is: PET base film → release layer → color layer → aluminized layer → adhesive coated layer → transfer to cardboard.

Vacuum aluminized cardboard is a kind of cardboard with metallic luster, which is a kind of advanced novel packaging material developed in recent years. This kind of aluminized cardboard has bright color, strong metallic sense and bright and elegant printings, which can replace the large area of hot stamping of printed materials and play a role of icing on the cake for the beautification of goods. Because it adopts the method of vacuum aluminizing, the surface of the cardboard is only covered with a thin and tight layer of 0.25um~0.3um aluminum layer, which is only one fifth of the aluminum foil layer of the laminated aluminum cardboard, so that it has both noble and beautiful metallic texture, but also has degradable and recyclable environmental protection properties, and is a green packaging material.

PET reflective film

PET reflective film is characterized by excellent optical properties, flat and smooth surface, good thermal stability, small shrinkage rate and light aging resistance.

There are two kinds of reflective materials used in traffic facilities: lens-type directional reflective film and flat-top reflective film, both of which use aluminized PET film as the reflective layer, on which a number of glass beads with refractive index of 1.9 are adhered to the PET aluminized film after being coated with pressure-sensitive adhesive, and then sprayed with a layer of butyral surface protection layer.

PET reflective film is applied to billboards with reflective requirements, traffic reflective signs (reflective road signs, reflective barrier, reflective vehicle number plates), reflective police uniforms, industrial safety signs, etc.

Chemically Coated Films

In order to improve the surface properties of PET films for better printability and bonding of vacuum aluminizing layers, corona treatment is usually used to increase the surface tension of films. However, the corona method has problems such as timeliness, especially in high temperature and high humidity environments, and the tension of corona-treated films can easily decay. The chemical coating method, however, does not have such problems and is favored by the printing and aluminizing industries. In addition, the coating method can also be used to produce high barrier films and antistatic films, etc.

PET anti-static film

Today’s world has entered the information age, various frequencies and wavelengths of electromagnetic waves filled the entire earth space, these electromagnetic waves will be unshielded sensitive electronic components, circuit boards, communication equipment, etc. will produce varying degrees of interference, resulting in data distortion, communication disruption. And electromagnetic induction and friction generated static electricity on various sensitive components, instruments, certain chemical products, etc., such as the accumulation of electrostatic discharge due to packaging film, the consequences will be devastating, so the development of anti-static PET packaging film is also very important. The feature of antistatic film is that by adding some kind of antistatic agent in PET film, a very thin conductive layer is formed on the surface of the film to improve the surface conductivity, so that the generated charge can be leaked as soon as possible.

PET Heat Seal Film

PET film is a crystalline polymer, after stretching and orientation, PET film will produce a large degree of crystallization, if it is heat sealed, it will produce shrinkage and deformation, so ordinary PET film does not have heat sealing performance. To a certain extent, the application of BOPET film is limited.

To solve the problem of heat sealing, we have developed a three-layer co-extruded heat-sealable PET film by modifying PET resin and adopting a three-layer A/B/C structure die, which is easy to use because one side of the film is heat-sealable. Heat-sealable PET films can be widely used in the fields of packaging and card protection films for various products.

PET heat shrink film

Polyester heat shrink film is a new type of heat shrink packaging material. Because of its easy recycling, non-toxic, tasteless, good mechanical properties, especially in line with environmental protection, polyester (PET) has become an ideal substitute for polyvinyl chloride (PVC) heat-shrinkable film in developed countries. However, ordinary polyester is a crystalline polymer, and ordinary PET film can only obtain a heat shrinkage rate of less than 30% after a special process. To obtain polyester films with higher heat shrinkage, they must also be modified. In other words, in order to prepare polyester films with high heat shrinkage, copolymerization modification of common polyester, i.e. polyethylene terephthalate, is required. The maximum heat shrinkage of copolymer-modified PET films can be up to 70% or more.

The characteristics of heat-shrinkable polyester film: it is stable at room temperature, shrinks when heated, and is more than 70% heat shrinkage occurs in one direction. The advantages of heat-shrinkable polyester film packaging are: ① Transparent to fit the body and reflect the image of goods. ②Tightly bundled wrapper, good anti-dispersal. ③rainproof, moisture-proof, mold-proof. ④No recovery, with certain anti-counterfeiting function. Heat shrinkable polyester film is commonly used in convenience food, beverage market, electronic and electrical appliances, metal products, especially shrinkable labels are its most important application area. Because with the rapid development of PET beverage bottles, such as Coke, Sprite, various fruit juices and other beverage bottles need PET heat shrinkable film with it to do heat sealing labels, they belong to the same polyester class, is environmentally friendly materials, easy to recycle and reuse.

In addition to shrink labels, heat shrink polyester film has also started to be used on the outer packaging of daily commodities in recent years. Because it can protect the packaging items from impact, rain, moisture and rust, and also make the products win users with beautifully printed outer packaging, while it can well show the good image of the manufacturer. At present, more and more packaging manufacturers are using printed shrink film to replace the traditional transparent film. Because printing shrink film can improve the appearance of the product grade, is conducive to product advertising, and can make a deep impression of the trademark brand in the hearts of consumers.

Guangdong Lebei Packing Co.,Ltd. has passed QS, SGS, HACCP, BRC, and ISO certifications.If you want to know more and intend to order the bags, please contact us. We will provide you with good service and favorable price.

Post time: Aug-28-2023