As one of the materials commonly used in disposable food packaging, aluminum foil has its unique characteristics and advantages, so how to add this kind of aluminum foil?
The aluminum foil billet is a cold-rolled aluminum coil with a thickness of 0.4-0.7mm and a high deformation rate. The aluminum foil billet is first pre-quenched at 240-480℃ and then fed into the roller press. The steel roller with high hardness and high smoothness is rolled through rough rolling, medium rolling, and excellent rolling to form a sheet. The thickness of aluminum foil can be controlled by adjusting the tension, rolling force of rough rolling and speed of finishing rolling.
In finish rolling, the thickness of the foil decreases with increasing rolling speed. The greater the tension, the smaller the thickness. The minimum thickness and width of the best method can be up to 0.0025mm and 1800mm. This kind of aluminum foil without other processing is called light foil or plain foil, light foil bearing capacity is poor, rarely used alone, generally according to different USES, the light foil to carry out deep processing, made of more advanced packaging materials.
Aluminum foil and plastic film, paper, cellophane and other adhesive lamination or coating with PE, to form a variety of purposes of the composite film.
Aluminum foil can be on the coloring machine diagram of a variety of colors, expected to cooperate with its own metal luster, form a unique luster color, improve its decorative performance.
Aluminum foil can be printed directly or printed after surface coating, generally using flexographic printing, gravure printing, and screen printing. Because aluminum foil does not have absorption, the surface adsorption capacity is very poor, so the printing needs to rely on the solvent in the paint to dry.
In addition, the aluminum foil is very soft, so it is necessary to ensure that the softness of printing ink is consistent with the aluminum foil after drying, and the ink film cracks, small pieces fall off or even the whole separation phenomenon occurs to party b. During printing, the thin aluminum foil should be supported by a plate or mounted with a liner before printing to prevent aluminum foil from breaking. After printing, the aluminum foil is used as the packaging material for sales. Its special luster and ink match together to have a good decorative effect on goods.