On Vacuum Aluminized Paper

Aluminum is coated on a polyester or polypropylene plastic film, and then the aluminum film is transferred to the paper base through an adhesive, and finally the plastic film is peeled off. This process does not require much paper. It can also be used in thick paper, and the peeled plastic film can be reused. The transfer evaporation method can produce paper or paperboard of 40-450g/m2 or more. Compared with the direct method, the outstanding features of the transfer method are: (1) It can produce paper or paperboard of any thickness; (2) It can make full use of the flatness of the film to make the paper metal luster more bright; (3) Can produce radiant Any anti-counterfeiting vacuum aluminized paper or cardboard with any pattern or arbitrary text. Disadvantages are: (1) transfer of the film after multiple uses, waste disposal is also a problem; (2) more processes, labor costs are relatively high.

2.3 Vacuum aluminum-plated paper production equipment

Due to different production processes, the equipment required for vacuum aluminum-plated paper is also different. The main equipment required for the direct evaporation process is as follows [3,9]: (1) A special coating equipment for aluminum plating before/after (must be equipped with humidity control function); (2) a high quality, high quality Vacuum paper aluminum plating machine (the above equipment is preferably imported equipment). The equipment required for the transfer evaporation method is as follows: (1) a coating equipment for coating separation layer, color layer, adhesive layer; (2) a plastic aluminum plating machine; (3) a composite machine (4) A stripping machine (requirements for the above-mentioned equipment are relatively low. If the process is more familiar, low-grade equipment or some domestic equipment can also be used to organize production).

If the equipment is ordered with both the direct evaporation process and the transfer evaporation process, combined with the latest raw material supply situation at home and abroad, the following equipment can be configured [3]: (1) One aluminum plating front/rear coating Equipment (must be equipped with double-coated probe and connection humidity control function); (2) a high-quality, high-vacuum paper/plastic dual-purpose aluminum plating machine; (3) a dry composite machine, mainly used (4) A stripping machine is mainly used to transfer the stripping process in the production of aluminized gold/silver cardboard, after the stripping unit (before the rewinding unit). ) Add a coating unit for coloring or varnish protection.

Other auxiliary equipment includes [3]: (1) a subdivision cutter - used for slitting processing of cigarette liners, etc.; (2) a crosscutter - used for aluminizing wine labels and transfer Aluminized gold/silver cardboard cross-cutting.

3 Detection of vacuum aluminum coated paper

Due to the different uses of vacuum aluminum-coated paper, the performance requirements for aluminum-coated paper are also different. It will affect the quality of vacuum-coated paper, such as: vacuum aluminum plating for food packaging for cigarettes, chewing gum and bubble gum linings. Paper, first of all requires that the aluminized base paper is non-toxic and odorless, and meets the requirements of food hygiene (in conformity with the US FDA certification). In terms of physical properties, for the printing and packaging industry, especially the cigarette packaging industry, the performance requirements of paper are mainly divided into the following four categories: (1) Basic performance: thickness, quantity, density, and moisture uniformity; (2) appearance data : Whiteness, hue, gloss, smoothness, printability, ink absorbency; (3) Intensity data: Stiffness, internal bond force, Z-direction tension, MIT folding resistance, tensile strength; (4) Operational data : moldability, gluing, bending, printing and packaging operation performance;
At the same time, the base paper also requires a good appearance and a smooth paper surface. There should be no paper, wrinkles, or cracks that can affect the appearance of the paper.

In addition, the use of different vacuum aluminum coating paper should have some technical indicators are different, such as: Beer bottle trademark requirements vacuum aluminum paper should have good temperature resistance, water resistance, in order to avoid the use of aluminum during the process of bleaching quality problems . However, the inspection items for vacuum aluminized paper should basically be the same, and it is the enterprise standard for quality control of aluminized paper in a printing factory. Therefore, at present, China should begin to formulate product testing standards for aluminized base paper and vacuum aluminized paper, and standardize the market space for vacuum aluminized paper, so that there is a common understanding between manufacturers and printing plants and end users.

The performance and printing quality of vacuum aluminized paper involve various aspects. As long as quality control and control are strictly conducted from the source of quality, production and guidance of production according to the standard can effectively prevent the occurrence of various quality problems, and ensure the vacuum plating of aluminum paper. Use performance.

4 Application of Vacuum Aluminized Paper

Vacuum aluminum-plated paper according to the production process is divided into two kinds of direct aluminum-plated paper and transfer aluminum paper, according to the type is divided into ordinary aluminum-plated paper and holographic laser anti-counterfeit aluminum-plated paper two categories, both product characteristics and markets are complementary Rather than competition, it has a wide range of applications.

Direct aluminized paper is mainly used in the lining of cigarettes, bubble gum and chewing gum, candy wrap, margarine packaging and labels (including beer labels, soft drink labels, wine bottles, food and paint cans, etc.).
Transfer aluminized paper is mainly used for packaging of high-end cigarettes, sugar alcohol, medicine, cosmetics and electronic appliances. Of course, the use of these two products can be crossed.

In short, vacuum aluminum-plated paper is not only beautiful in appearance, but more importantly, in the increasingly loud voice of environmental protection, its anti-counterfeiting and degradability make it an environmentally friendly product that meets international trends. Nowadays, more and more well-known enterprises have realized and started to apply this new type of packaging material to high-end packagings such as cigarette cases, gifts, and alcohol, which will inevitably bring new development opportunities to China's paper industry.