Analysis of the classification and use of release film

PET high gloss film

In addition to the excellent physical and mechanical properties of ordinary polyester film, PET high gloss bright film also has excellent optical properties, such as good transparency, low haze and high gloss. It is mainly used for high-grade vacuum aluminum plating products. The film is mirror-coated after aluminum plating, which has good packaging decoration effect; it can also be used for laser laser anti-counterfeit base film. Gao Guangliang BOPET film has large market capacity, high added value and obvious economic benefits.

PET transfer film

The transfer film is also called a heat transfer film. The transfer film is characterized by high tensile strength, good thermal stability, low heat shrinkage, smooth and smooth surface, good peelability, and can be used repeatedly. It is mainly used as a vacuum aluminum plating carrier. After the PET film is placed in a vacuum aluminum plating machine, the rubber film is laminated with the paper, and then the PET film is peeled off, and the aluminum molecular layer is transferred to the surface of the paperboard by the adhesive action. A so-called aluminized cardboard is formed.

PET reflective film

PET reflective film is characterized by excellent optical properties, smooth surface, smooth surface, good thermal stability, low shrinkage and light aging resistance. Reflective materials used in transportation facilities include lens-type retroreflective film and flat-top reflective film. They are all made of aluminized PET film as a reflective layer. After applying pressure sensitive adhesive, some glass with a refractive index of 1.9 is used. The beads are adhered to the PET aluminized film, and then a layer of butyral surface protective layer is sprayed.

Chemical coating film

In order to improve the surface properties of the PET film, in order to improve the adaptability of printing and the bonding force of the vacuum aluminum plating layer, a corona treatment method is generally used to increase the surface tension of the film. However, the corona method has problems such as aging, and particularly in a high-temperature, high-humidity environment, the film tension after corona treatment is easily attenuated. However, the chemical coating method does not have such a problem, so it is favored by the printing industry and the aluminum plating industry.

PET antistatic film

The world today has entered the information age. Electromagnetic waves of various frequencies and wavelengths fill the entire earth space. These electromagnetic waves will cause different degrees of interference to unshielded sensitive electronic components, circuit boards, communication equipment, etc., resulting in data distortion. Communication is disordered. Electrostatic induction and friction generated static electricity on various sensitive components, instrumentation, certain chemical products, etc., such as high-voltage discharge due to static accumulation of packaging film, the consequences will be destructive, so the development of anti-static PET packaging film is also very important. The antistatic film is characterized in that an antistatic agent is added to the PET film to form a very thin conductive layer on the surface of the film, and a continuous phase is formed to improve the surface conductivity and cause the generated charge to leak as soon as possible. Generally, the surface specific resistance of the antistatic film is ≤109~11 ohms.

PET heat seal film

Ordinary PET is a crystalline polymer. When the PET film is stretched and oriented, a large degree of crystallization occurs. If it is heat-sealed, shrinkage deformation occurs, so the ordinary PET film does not have heat-sealing properties. When PET film is used as a commodity packaging, in order to solve the problem of heat sealing, a method of compounding a BOPET film with a PE film or a CPP film is generally adopted, thereby limiting the application of the BOPET film to a certain extent. In order to solve the heat sealing problem, a three-layer co-extruded heat-sealed PET film, a heat-sealed PET film, has been developed by modifying a PET resin and using an A/B/C three-layer die. Since one side is heat sealable, it can be directly heat sealed and is very convenient to use.

PET shrink film

Polyester heat shrinkable film is a new type of heat shrinkable packaging material. Due to its easy recycling, non-toxicity, odorlessness, good mechanical properties, and especially environmental protection, polyester (PET) has become an ideal substitute for polyvinyl chloride (PVC) heat shrinkable film. However, the ordinary polyester is a crystalline high polymer, and the ordinary PET film can only obtain a heat shrinkage rate of 30% or less by a special process. To obtain a polyester film with a higher heat shrinkage rate, it must also be modified. That is, in order to prepare a polyester film having a high heat shrinkage ratio, it is necessary to copolymerize a common polyester, that is, polyethylene terephthalate. The copolymerized modified PET film has a maximum heat shrinkage rate of up to 70%. The characteristics of the heat-shrinkable polyester film: it is stable at normal temperature, shrinks upon heating (above the glass transition temperature), and is more than 70% heat shrinkage in one direction. The advantage of heat shrinkable polyester film packaging is that it is transparent and reflects the image of the product. Tightly packed with good anti-scattering properties. Moisture proof, mildew proof. No recovery, there is a certain anti-counterfeiting function. Heat-shrinkable polyester film is often used in the convenience food, beverage market, metal products, especially shrinkage labels are its main application areas. Because with the rapid development of PET beverage bottles, beverage bottles such as cola, sprite, and various juices require PET heat shrinkable film to be used as a heat seal label. They are all polyester-based, environmentally friendly materials, and easy to recycle. use. In addition to being used as a shrink label, heat-shrinkable polyester film has also been used in outer packaging for daily use products in recent years. Because it can protect the packaged articles from impact, moisture and rust, and make the products win the users with beautifully printed outer packaging, and it can show the good image of the manufacturer. At present, more and more packaging manufacturers use printed shrink film to replace traditional transparent film. Because the printing shrink film can improve the appearance of the product, which is conducive to the advertising of the product, the trademark brand can make a deep impression on the consumer, thereby increasing sales.