Aluminum foil adhered to the composite layer. Composite aluminum foil has the characteristics of both aluminum foil and composite layer, which can improve and improve the performance of aluminum foil. There are many composite methods: aluminum foil-composite layer; aluminum foil-composite layer-aluminum foil; composite layer-aluminum foil-composite layer; multiple composite layers, etc. The composite aluminum foil composed of aluminum foil and paper is called mounted aluminum foil.
The thickness of plain foil of composite aluminum foil (see aluminum foil production) is usually in the range of 0.007~0.015mm. When compounding, the light side can be on the outside or the dark side can be on the outside. Aluminum foil that has been coated, colored or printed is also often used. In order to make the paste strong, the aluminum foil should be annealed, softened, degreased and degreased first. In order to facilitate lamination, the aluminum foil roll should be moderately tight, have regular edges and few joints.
The materials of the composite layer include paper and plastic film. Papers include cellophane, carbon paper, molded paper, pure white glossy paper, fine paper, tissue paper, parchment paper, kraft paper and cable paper, etc. Plastic films include polyester, polyethylene, polypropylene, vinyl chloride and nylon. Although their densities are different, their thickness is still expressed in terms of weight per unit area (g/m2).
In addition, there are also requirements for the lubrication and roughness, compactness, moisture permeability, bursting strength, tear strength and elongation of the surface of the composite layer. The selection of composite layer materials and the determination of the pasting method are based on the application requirements and the physical and chemical characteristics of the packaged objects. Pasting equipment and methods The pasting of composite aluminum foil is carried out on the pasting machine. The pasting machine is equipped with aluminum foil and paper (or plastic film). Unwind reel and take-up reel for composite aluminum foil.
