Anodized aluminum----Aluminium Foil

        

 

Anodized aluminum----Aluminium Foil

Aluminium foil is one of the most important and most widespread cold-rolled aluminium and aluminium-alloy product, and is mainly used in consumer products.

Long life-time, low price and a unique combination of properties are additional arguments in favour of the utility of aluminium foil in the most varied fields of use. Aluminium foil is also environmentally friendly, since it can be recycled and reused.

 

Aluminium foil properties

The chemical composition of individual alloys defines their specific properties, but the following properties are common to all alloys:

 

Aluminium foil does not react with the majority of organic substances.

Its resistance to chemical action depends on individual compounds or its components. Corrosion occurs in salt media, but foil for such purposes is pre-treated or laminated, which prevents direct contact with medium.

Alimentary products do not react with aluminium foil.

Aluminium foil is opaque

Most important applications of aluminium foils

Foils for further processing: suitable for processing such as laminating, colouring, printing etc. It is used for packaging in the food industry, confectionery, cosmetics, pharmaceutical and tobacco industries.

Foils for technical purposes: for example smooth or textured insulation foil, intended for further processing with bitumen or other insulating materials; foil for cable wrapping; foil for self-adhesive tapes, capacitor foil, honeycomb foil etc.)

Household foils

Such varied fields of use result from the excellent properties of aluminium foil: low density, high electrical conductivity, good plasticity, corrosion resistance, high reflectivity, opacity, non-toxicity, and the possibility of achieving a very attractive effects through further processing.

Technological process of foil manufacturing

Cold-rolled coils (commercially known as foil-stock) serve as input raw material in manufacturing foils. The basic input material for Foil Plant is cold-rolled strip with a thickness of 0,3 mm which is rolled in four-high rolling mills to the desired foil thickness.

Foils produced in this manner are single or doubled, which means that two foils are rolled simultaneously. The external sides that were in contact with working rolls are bright, while the inner sides where the two foils are in contact remains matt.

 

Rolling procedure for doubled foils is used in making all the foils with final thickness of 0,050 mm or less. The production process is based on modern technological principles and most up-todate technology.

Most of foils are annealed in furnaces. Annealing enables achievement of final properties of the aluminium foil. At the same time the residuals of rolling oil used in the rolling process are evaporated off; such a foil is degreased and sterile. This is essential for use in food industry.

The health hazards with the aluminium foil are checked by the Institute of Public Health in Maribor.

Aluminium foil is supplied in coil on various cores. After final trimming and cutting, foil is coiled to the desired external diameter or in the desired length. Steel or aluminium cores are used for coiling, and their dimensions depend on foil thickness and width, customer’s requirements, shipping and other factors.

 

Variety	Alloy	Temper	Size（mm）
			Thickness		Width		I.D		Max O.D
Appliance foil	8011、8079	O	0.01~0.02		200~700		76.2、152.4		450
Cable foil	1050、1145	O	0.1~0.2		200~600		76.2		800
Pharmacy foil	1235、8011、8079	H18、H19	0.018~0.022		400~600		76.2		600
Air-conditioner foil	1100、8011、3102	H22、H24、H26、H19	0.07~0.20		400~1310		150、200、505		1450
Cigarette foil	1235	O	0.006~0.007		460~1320		76.2		400
Further fabricating foil	8011	O、H22、H24、H26、H18	0.012~0.06		300~1300		76.2		1300
Electronic foil	1A99、1A97	H19	0.09~0.15		500~1000		76.2		1450
	3003、3001		0.02~0.05
Lithographic sheet	1050	H18	0.14~0.15		600~1470		150、200		1200
Decoration foil	1100、3003	H18	0.026~0.15		1240~1400		150、200		1200

 

Key words: Anodized aluminum, Aluminium Foil