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The basic properties of the aluminum plating pre-coating film ( Below)

by:Taian Lamination Film     2021-02-04

          Aluminized pre-coating film is to use a special process on the plastic film surface plating a thin layer of metal aluminum and formed a kind of composite flexible packaging materials, one of the most commonly used processing methods when the number of vacuum aluminum plating method, is in the high vacuum state through high temperature melt aluminum evaporation, precipitation accumulation of the steam to the aluminium plastic film on the surface, so that the plastic film surface with metallic luster. Because it has the characteristics of plastic film, but also has the characteristics of metal is a kind of cheap and beautiful packaging materials, excellent performance, strong practicability.


          5, physical and mechanical properties. Because aluminum plating film by mechanical force in the process of composite function, therefore, requires its must have certain mechanical strength and flexibility, should have good tensile strength, elongation, tear strength, impact strength, excellent properties, such as folding resistance and toughness, to ensure that its not easy to appear in the process of composite processing kneading, buckling, the phenomenon such as fracture.


          6, the moisture transmission. Moisture transmission said the aluminum plating film under certain conditions through the amount of water vapor, it from a certain extent, reflects the moisture resistance of aluminum plating film. Such as thickness of 12 um polyester aluminum plating film ( VMPET) The moisture transmission in 0. 3 g/㎡·24h ~ 0. 6 g / ㎡ between 24 h ( Temperature 30 ℃, relative humidity 90%) ; The thickness of 25 um CPP aluminum plating film ( VMCPP) The moisture transmission in 1. 0 g/㎡·24h ~ 1. 5 g / ㎡ between 24 h ( Temperature 30 ℃, relative humidity 90%) 。


          7, oxygen permeability. Oxygen permeability represents the aluminum plating film under certain conditions through the amount of oxygen, it reflects the aluminum plating film on the size of the oxygen barrier property, such as the thickness of 25 um polyester aluminum plating film ( VMPET) The oxygen permeability of 1. 24 ml / ㎡, the 24 h ( Temperature of 23 ℃, relative humidity of 90%) 。


          8, the size of the surface tension. In order to make the printing ink and composite adhesive for the aluminum plating film surface has good wettability and adhesive properties and requirements of aluminized pre-coating film surface tension should reach a certain standard, otherwise it will affect the ink and adhesive on the surface adhesion and adhesive properties, which affect the quality of the print and composite products. Such as polyester aluminum plating film ( VMPET) The surface tension of the requirements for more than 45 dyne, at least also want to reach more than 42 dyne.

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