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.

Features Of Aluminum Foil

Aluminum foil has a clean, hygienic and shiny appearance. It can be made into integrated packaging materials with many other packaging materials, and the surface printing effect of aluminum foil is better than other materials. In addition, aluminum foil has the following characteristics:

(1) The surface of the aluminum foil is extremely clean and hygienic, and no bacteria or microorganisms can grow on its surface.

(2) Aluminum foil is a non-toxic packaging material, which can be in direct contact with food without any danger of harming human health.

(3) Aluminum foil is an odorless and odorless packaging material, which will not make the packaged food have any peculiar smell.

(4) If the aluminum foil itself is not volatile, it and the packaged food will never dry or shrink.

(5) No matter in high temperature or low temperature, the aluminum foil will not have the phenomenon of grease penetration.

(6) Aluminum foil is an opaque packaging material, so it is a good packaging material for products exposed to sunlight, such as margarine.

(7) Aluminum foil has good plasticity, so it can be used to package products of various shapes. Various shapes of containers can also be arbitrarily formed.

(8) Aluminum foil has high hardness and high tensile strength, but its tear strength is small, so it is easy to tear.

(9) The aluminum foil itself cannot be heat sealed, and a heatable material, such as Pe, must be applied to its surface to be heat sealed.

(10) When aluminum foil is in contact with other heavy metals or heavy metals, there may be adverse reactions.