Pet aluminizing film is a kind of composite flexible packaging material formed by plating a very thin layer of metal aluminum on the surface of plastic film by special process. The most commonly used processing method is vacuum aluminizing method, it is to melt and evaporate the metal aluminum at high temperature under high vacuum to accumulate the vapor precipitation of aluminum on the surface of the plastic film, thus making the surface of the plastic film have metallic luster.
Because it has the characteristics of both plastic film and metal, it is a cheap, beautiful and practical packaging material. II. Characteristics [1)
The amount of aluminum used is greatly reduced, energy and materials are saved, and the cost is reduced. The thickness of composite aluminum foil is mostly 7 ~ Gpm, while the thickness of aluminum layer of aluminum plating film is about 0.
About 05n, its aluminum consumption is about 1/140 of that of aluminum foil ~ 1/180, and the production speed can be as high as 450 m/min. (2)
It has excellent folding resistance and good toughness, with few pinholes and cracks and no cracking, thus improving the barrier to gas, water vapor, smell, light, etc. (3)
It has excellent metallic luster and light reflectivity can reach 97%;
And the color film can be formed by coating treatment, and its decoration effect is beyond the reach of aluminum foil. (4)
Shielding type can be used for partial aluminum plating to obtain any pattern or transparent window and to see the contents. (5)
The aluminum plating layer has good conductivity and can eliminate electrostatic effect;
Its sealing performance is good, especially when packaging powdered products, it will not pollute the sealing part, thus ensuring the sealing performance of the packaging. (6)
It has good adaptability to post-processing such as printing and compounding.
Due to the above characteristics, aluminum plating film has become a new type of composite film with excellent performance, economy and beauty, and has replaced aluminum foil composite material in many aspects.
It is mainly used for vacuum packaging of flavor food and agricultural products, as well as packaging of medicines, cosmetics and cigarettes.
In addition, aluminized films are also widely used as bronzing materials and trademark label materials in printing.
Three, the application of the most widely used aluminum plating film is mainly polyester aluminum plating film (VMPET)And CPP aluminum coating (VMCPP).
The function of aluminum plating on the surface of the film is to shade light and prevent ultraviolet radiation, which not only prolongs the shelf life of the contents, but also improves the brightness of the film, replacing aluminum foil to a certain extent, it also has low price, beautiful appearance and good barrier performance. Therefore, aluminum plating film is widely used in composite packaging, at present, it is mainly applied to the packaging of dried and puffed foods such as biscuits and the outer packaging of some medicines and cosmetics.
IV. Application of plastic-coated aluminum film as the name implies, plastic-coated aluminum film is coated with a layer of PE on common materials such as OPP, CPP and PET aluminum film, which is an industrial semi-finished product. The material can continue to be hot pressed with Pearl cotton, woven cloth, non-woven fabric and other materials are compounded to make the required products.