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Classification of aluminum foil
Sort by thickness
According to the difference in thickness, aluminum foil can be divided into thick foil, single zero foil and double zero foil.
① Thick foil: foil with a thickness of 0.1 to 0.2 mm.
②Single zero foil: foil with a thickness of 0.01mm and less than 0.1mm/.
③Double-zero foil: The so-called double-zero foil is a foil with two zeros after the decimal point when its thickness is in mm, usually an aluminum foil with a thickness of less than 0.01, that is, an aluminum foil with a thickness of 0.005~0.009mm.
Sort by shape
According to the shape, aluminum foil can be divided into roll aluminum foil and sheet aluminum foil. Most of the aluminum foil deep-processing wool is supplied in rolls, and sheet aluminum foil is only used in a few handicraft packaging occasions.
According to the state, aluminum foil can be divided into hard foil, semi-hard foil and soft foil.
①Hard foil: aluminum foil that has not been softened (annealed) after rolling, and that there is residue on the surface when it is not degreasing. Therefore, the hard foil must be degreased before printing, lamination, and coating, and it can be used directly if it is used for forming.
②Semi-hard foil: Aluminum foil whose hardness (or strength) is between hard foil and soft foil, usually used for forming.
③Soft foil: The aluminum foil that has been fully annealed and softened after rolling has a soft material and no residual oil on the surface. Most of the current application areas, such as packaging, lamination, electrical materials,etc.,use soft foils.
Sort by Surface State
According to the surface state, aluminum foil can be divided into one-sided smooth aluminum foil and two-sided smooth aluminum foil.
①Single-sided smooth aluminum foil: double-rolled aluminum foil, one side is bright after sub-rolling, and the other side is black, such aluminum foil is called one-sided smooth aluminum foil. The thickness of one side light aluminum foil is usually not more than 0.025mm.
②Double-sided smooth aluminum foil: A single rolled aluminum foil, two paintings are in contact with the roll, and the two sides of the aluminum foil are divided into mirror two-sided smooth aluminum foil and ordinary two-sided smooth aluminum foil due to the difference in the surface roughness of the roll. The thickness of the two-sided glossy aluminum foil is generally not less than 0.01mm.
Classification by processing state
According to the processing state, aluminum foil can be divided into plain foil, embossed foil, composite foil, coated foil, colored aluminum foil and printed aluminum foil.
①Plain foil: Aluminum foil without any other processing after rolling, also known as light foil.
②Embossed foil: Aluminum foil with various patterns pressed on the surface.
③Composite foil: composite aluminum foil formed by laminating aluminum foil, paper, plastic film and cardboard together.
④Coated foil: aluminum foil coated with various resins or paints on the surface.
⑤Colored aluminum foil: The surface is coated with aluminum foil of a single color.
⑥Printing aluminum foil: By printing the aluminum foil with various patterns, patterns, characters or pictures on the surface, it can be one color, up to 12 colors.
Soft aluminum foil can also be further pressed into four-zero foil for high-end decoration.
Aluminum foil box, also known as tin box, generally has a thickness between 0.03mm and 0.20mm, and can be divided into two types: wrinkled and wrinkle-free. It can also be divided into one-time and repeated use. It is a 3 series or 8 series aluminum ingot raw material, which is cold-rolled or hot-rolled into an aluminum foil master roll with uniform thickness, smooth surface, no pinholes, no dust particles, and no peculiar smell, and then passes through special equipment and molds. Automatic cold stamping. The most commonly used is 8011 aluminum alloy or 3003 aluminum alloy, there are two kinds of plain foil and coated foil. The more widely used are airline food, home cooking and large chain cake shops. Main uses: food cooking, baking, freezing, preservation, etc.
Advantages and characteristics of aluminum foil lunch box
1. Light weight; The products meet the national food hygiene standards;
2. It is environment-friendly, recyclable, convenient, pollution-free and renewable;
4. Suitable for bulk sale. Adapt to the characteristics of fast updating and large consumption of lunch boxes;
5. Wide application range; It is airtight, with good coverage, beautiful and thermal insulation;
6. It has outstanding barrier performance. On the premise that the aluminum foil is thick enough, it can basically completely block gas and water. Often used as barrier material;
9. The aluminum foil lunch box can be directly put into the gas stove or microwave oven for heating without fear of harm, which is very convenient.
