Classification and characteristics of aluminum foil

Aluminum foil is a hot stamping material which is directly calendered into a thin sheet of metal aluminum. Its hot stamping effect is similar to that of pure silver foil stamping, so it is also called fake silver foil. Since aluminum has a soft texture and good ductility, it has a silvery white luster. If the calendered sheet is smashed on an offset paper with a material such as sodium silicate, an aluminum foil sheet can be formed.

1.Development of aluminum foil

China's aluminum foil consumption is trending from long-term, from 300,000 in 2001 to about 1.3 million in 2010, and the compound long-term rate is 18%. Although China is the second largest aluminum foil consumer in the world after the United States, China's aluminum foil market is still relatively Big upside.

In the production and operation of specialized aluminum foil enterprises, we need to be meticulously crafted, to meet the needs of users in specific aluminum foil markets with their professional skills, and to develop new and more suitable aluminum foil materials in combination with the continuous innovation of users' products. Specialized aluminum foil companies achieve stable operating income by providing special high-quality, high-performance, high-added products and services to specific users.

Aluminum foil enterprises can cooperate with aluminum processing market research institutions to fully research and demonstrate their markets, adopt a professional development model, and make brands in the subdivided aluminum foil market. Although the new aluminum foil market is not large in scale, it can extend the industrial chain vertically and process aluminum foil materials into end products. The high addition of products can offset the shortage of professional market capacity and rely on the competitive advantages of specialized brands. Better operating efficiency.

2.the classification of aluminum foil

thickness

Aluminum foil can be divided into thick foil, single zero foil and double zero foil according to the thickness difference.

① thick foil ("heavy gaugefoil"): a foil having a thickness of 0.1 to 0.2 mm.

② "medium gauge foil": a foil having a thickness of 0.01 mm and less than 0.1 mm/.

③ "light gauge foil": The so-called double-zero foil is a foil with two zeros after the decimal point in its thickness, usually aluminum foil with a thickness less than 0.01, ie 0.005~0.009mm aluminum foil . In foreign countries, an aluminum foil having a thickness of ≤ 40 ltm is sometimes referred to as a "light gauge foil", and an aluminum foil having a thickness of > 40 btm is collectively referred to as a "heavy gauge foil".

shape

The aluminum foil can be divided into a rolled aluminum foil and a sheet aluminum foil according to the shape. Most of the aluminum foil deep-processing wool is supplied in rolls, and only a few hand-made industrial packaging uses sheet-like aluminum foil.

Aluminum foil can be classified into hard foil, semi-hard foil and soft foil according to the state.

① Hard foil: Aluminum foil that has not been softened (annealed) after rolling, and has no residue on the surface without degreasing. Therefore, the hard foil must be degreased before printing, lamination, coating, and can be used directly if it is used for forming.

② semi-hard foil: aluminum foil hardness (or strength) between the hard foil and the soft foil, usually used for forming.

③ soft foil: aluminum foil which is softened after being fully annealed after rolling, the material is soft and there is no residual oil on the surface. Soft foils are used in most applications, such as packaging, composites, and electrical materials.

surface condition

The aluminum foil can be divided into a light aluminum foil and a double-sided aluminum foil according to the surface state.

① single-sided aluminum foil: double-rolled aluminum foil, after the split, one side is bright, and the surface is black. Such aluminum foil is called a light aluminum foil. The thickness of a side of a light aluminum foil usually does not exceed 0.025 mm.

② double-sided aluminum foil: single-rolled aluminum foil, the two sides are in contact with the rolls. The two sides of the aluminum foil are divided into mirror two-sided aluminum foil and ordinary two-sided aluminum foil due to the different surface roughness of the rolls. The thickness of the two-sided aluminum foil is generally not less than 0.01 mm.

Processing status

Aluminum foil can be divided into plain foil, embossed foil, composite foil, coated foil, colored aluminum foil and printed aluminum foil according to the processing state.

① plain foil: aluminum foil without any other processing after rolling, also called light foil.

② embossed foil: aluminum foil with various patterns on the surface.

③ composite foil: a composite aluminum foil formed by laminating aluminum foil and paper, plastic film and cardboard.

④ coated foil: aluminum foil coated with various types of resin or lacquer on the surface.

⑤ color aluminum foil: the surface is coated with a single color of aluminum foil. 6 Printing aluminum foil: Aluminum foil which is formed by printing various patterns, patterns, characters or pictures on the surface, which can be one color, up to 12 colors.

The soft aluminum foil can be further pressed into a four-zero foil for high-end decoration.

3. the characteristics of aluminum foil

(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 that can be in direct contact with food without any concern that may endanger human health.

(3) Aluminum foil is an odorless and odorless packaging material that does not impart any odor to the packaged food.

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

(5) There is no oil penetration of the aluminum foil at high temperatures or at low temperatures.

(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. It can also be used to create containers of various shapes.

(8) The aluminum foil has a large hardness and a large tensile strength, but its tear strength is small, so it is easily torn.

(9) The aluminum foil itself cannot be heat-sealed and must be coated with a heat-sensitive material such as pe to be heat-sealed.

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