Classification and Application of PET Film Gold Plated Copper Aluminum Silver

PET film, also known as high-temperature resistant polyester film. It has excellent physical and chemical properties, dimensional stability, transparency, and recyclability, and can be widely used in fields such as magnetic recording, photosensitive materials, electronics, electrical insulation, industrial films, packaging decoration, screen protection, and optical grade mirror surface protection.

With the development of special functional films, new uses for polyester films are constantly emerging. It can be produced into mobile phone LCD protective film, LCD TV protective film, mobile phone buttons, etc.

PET film is a packaging film with comprehensive performance. It has good transparency and luster; Has good air tightness and fragrance retention; Moderate moisture resistance, with a decrease in moisture permeability at low temperatures. PET film has excellent mechanical properties, and its strength and toughness are the best among all thermoplastic plastics. Its tensile strength and impact strength are much higher than ordinary films; And it has good rigidity and stable size, suitable for secondary processing such as printing and paper bags. PET film also has excellent heat and cold resistance, as well as good chemical and oil resistance. But it is not resistant to strong alkali; Easy to carry static electricity, there is no appropriate anti-static method yet, so attention should be paid when packaging powdered items.

PET film classification:

PET high gloss film

In addition to the excellent physical and mechanical properties of ordinary polyester film, this film also has excellent optical properties

pet film

Learning performance, such as good transparency, low haze, and high glossiness. It is mainly used for high-end vacuum aluminum plated productsAluminum plating on thin filmIt has a mirror like appearance and excellent packaging decoration effect; It can also be used for laser anti-counterfeiting base film, etc. The high gloss BOPET film market has a large capacity, high added value, and significant economic benefits.

PET transfer film

Transfer film, also known as thermal transfer film, is characterized by high tensile strength, good thermal stability, low thermal shrinkage rate, smooth surface, good peelability, and can be used repeatedly. It is mainly used as a carrier for vacuum aluminum plating, which involves placing PET film in a vacuum aluminum plating machine, coating it with adhesive and paper, and then peeling off the PET film. The aluminum molecular layer is transferred to the surface of the cardboard through adhesive action, forming the so-called aluminum plated cardboard.

The production process of aluminum coated cardboard is: PET base film → release layer → color layer → aluminum coating layer → adhesive layer → transfer to cardboard.

Vacuum aluminum plated cardboardIt is a type of cardboard with a metallic luster, which is a high-end and innovative packaging material developed in recent years. This aluminum plated cardboard has a bright color, strong metallic feel, and bright and elegant printed products. It can replace the extensive hot stamping of printed products and add icing on the cake to the beautification of the product. Due to its use of vacuum aluminum plating method, only a thin and tightly shiny aluminum layer of 0.25 μ m~0.3 μ m is covered on the surface of the cardboard, which is only one fifth of the aluminum foil layer of the laminated cardboard. This gives it a noble and beautiful metallic texture, as well as biodegradable and recyclable environmental properties, making it a green packaging material

PET reflective film

The characteristics of PET reflective film are that the film has excellent optical properties, a flat and smooth surface, good thermal stability, low shrinkage rate, and resistance to light aging.

There are two types of reflective materials used in transportation facilities: lens type directional reflective film and flat top type reflective film. Both use aluminum coated PET film as the reflective layer, which is coated with pressure-sensitive adhesive. Several glass microspheres with a refractive index of 1.9 are adhered to the PET aluminum coated film, and then sprayed with a surface protective layer of butyraldehyde.

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

PET chemical coating film

In order to improve the surface properties of PET film, enhance the adaptability of printing, and improve the adhesion of vacuum aluminum coating, corona treatment is usually used to increase the surface tension of the film. However, the corona method has issues with timeliness, especially in high temperature and high humidity environments, where the tension of the film after corona treatment is easily attenuated. However, the chemical coating method does not have such problems, so it is favored by the printing industry and aluminum plating industry. Domestic enterprises have developed a series of PET chemical coating products, such as water-soluble polymer coating, which can improve the surface tension of PET films; Coating with acrylate lotion can improve the adaptability of printing (water-soluble ink can be used); Coating with polyurethane aqueous solution can enhance the adhesion between the aluminum plating layer and the PET base film, and increase the thickness of the aluminum plating layer.

In addition, the coating method can also be used to produce high resistance films and anti-static films.

PET anti-static film

The world has entered the era of information technology, and electromagnetic waves of various frequencies and wavelengths fill the entire Earth's space. These electromagnetic waves can cause varying degrees of interference to unshielded sensitive electronic components, circuit boards, communication equipment, etc., resulting in data distortion and communication disorder. The static electricity generated by electromagnetic induction and friction can cause destructive effects on various sensitive components, instruments, and certain chemical products, such as high-voltage discharge due to the accumulation of static electricity in packaging films. Therefore, it is also important to develop anti-static PET packaging films. The characteristic of anti-static film is to add a certain anti-static agent to PET film, forming a very thin conductive layer on the surface of the film and forming a continuous phase, improving the surface conductivity and allowing the generated charges to leak as soon as possible. Generally, it is required that the surface specific resistance of the anti-static film be ≤ 10 ^ 9-11 ohms

PET heat sealing film

Ordinary PET belongs to crystalline polymers. After being stretched and oriented, PET film will produce a large degree of crystallization. If it is heat sealed, it will undergo shrinkage deformation, so ordinary PET film does not have heat sealing performance. When PET film is used for product packaging, in order to solve its heat sealing problem, the method of compounding BOPET film with PE film or CPP film is usually adopted, which to some extent limits the application of BOPET film.

In order to solve the heat sealing problem, a three-layer co extruded heat sealed PET film has been developed by modifying PET resin and using a mold with an A/B/C three-layer structure. This heat sealed PET film can be directly heat sealed due to one side being a heat sealable layer, making it very convenient to use. Heat sealed PET film can be widely used in various fields such as packaging and protective film for various products.

PET heat shrink film

Polyester heat shrink film is a new type of heat shrink packaging material. Due to its characteristics of easy recycling, non toxicity, odorlessness, good mechanical properties, and especially compliance with environmental protection, polyester (PET) has become an ideal substitute for polyvinyl chloride (PVC) heat shrink film in developed countries.

However, ordinary polyester is a crystalline polymer, and ordinary PET film can only achieve a thermal shrinkage rate of less than 30% after special processing. To obtain polyester films with higher thermal shrinkage, modification is also necessary. That is to say, in order to prepare polyester films with high thermal shrinkage, it is necessary to copolymerize and modify ordinary polyester, namely polyethylene terephthalate. The highest thermal shrinkage rate of PET film modified by copolymerization can reach over 70%.

The characteristics of heat shrinkable polyester film: it is stable at room temperature, shrinks when heated (above the glass transition temperature), and undergoes over 70% thermal shrinkage in one direction.

advantage:

① Transparent body to body, reflecting the image of the product.

② Tight packaging with good anti scattering properties.

③ Rain proof, moisture-proof, and mold proof.

④ No recoverability, with certain anti-counterfeiting function.

Heat shrinkable polyester film is commonly used in the convenience food, beverage market, electronic appliances, metal products, especially in shrink labels, which is its main application field. With the rapid development of PET beverage bottles, such as cola, Sprite, various fruit juices, etc., PET heat shrink film is needed to match them for heat sealing labels. They both belong to the polyester class and are environmentally friendly materials that are easy to recycle and reuse.