PET film is a more comprehensive packaging film. Its transparency is good, shiny; has a good airtight and fragrant; moisture resistance is moderate, and the rate of moisture permeability decreases at low temperatures. PET film has excellent mechanical properties. Its toughness is the best among all thermoplastics. Its tensile strength and impact strength are much higher than those of ordinary films. It has good strength and dimensional stability. It is suitable for secondary processing such as printing and paper bags. . The 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 prone to static electricity, and there is no proper method for preventing static electricity. Therefore, attention should be paid when packaging powdered articles.
Transfer film, also known as thermal transfer film, this type of transfer film is characterized by high tensile strength, thermal stability, low thermal shrinkage, smooth surface, smooth, peeling, and can be used repeatedly. It is mainly used as a carrier for vacuum aluminum plating. That is, the PET film is placed on a vacuum aluminum plating machine after aluminizing, and the glue is combined with the paper. The PET film is then peeled off, and the aluminum molecular layer is transferred to the cardboard surface by adhesive action. A so-called aluminum-plated paper jam is formed. The production process of aluminum-plated cardboard is:
Vacuum aluminum-plated cardboard is a kind of metal glossy cardboard, which is a high-grade novel packaging material developed in recent years. This aluminum-plated paperboard has a bright color, strong metallic sensibility, and bright and elegant prints. It can replace the large-area gilding of printed materials, and it also serves as a icing on the cake for the beautification of products. Since it adopts the method of vacuum aluminum plating, only a layer of 0.25 um ~ 0.3 um thin, tight and bright aluminum layer is covered on the surface of the cardboard, which is only one-fifth percent of the aluminum foil-paper aluminum foil layer. With noble and beautiful metal texture, it also has degradable and recyclable environmental protection properties. It is a kind of green packaging material. Jiangsu Zhongda, through formula and process adjustment, was successfully developed in 2005 and launched in large quantities on the market, receiving very good economic benefits.
