Speaking of aluminium foil thickness, we think of 0.09mm or 0.1mm. Usually foil aluminium is not over 0.2mm thick, but there are thick aluminium foil sheet and even extra thick aluminium foil rolls. And the usage are quite familiar to us: transformer winding and sealing liners.
Transformer aluminium foil rolls mainly refer to aluminium strip 1060. While being used for transformers, it is an extra thick aluminium foil, with a thickness between 0.2mm and 3mm. 1060 O aluminium foil is used for winding units of high and low voltage in dry type transformers to achieve conversion and impedance matching between different voltages (currents). The traditional winding material for transformers is copper, which is much more expensive. People have been looking for an alternative of copper. The conductivity of metals are successively silver, copper, gold, aluminium, nickle and steel. Since the conductivity of aluminium is only second to copper, it becomes the best alternative as a transformer winding material. But the requirements for transformer aluminium foils are really high, and only powerful suppliers are able to supply them.
In addition to 1060 extra thick aluminium foil sheet, there is thick aluminium foil sheet, too. Take 8011 aluminium foil used for sealing liners for example. A roll of 8011 foil aluminium can be as thin as 0.016, but thick ones reach 0.5mm thick. Both thicknesses can be used as sealing liner materials, but in varied application conditions. Thick aluminium foil sheet products have natural advantages in sealing bottles and other containers. They display an excellent insulation property, protecting sealed materials (food, medicine, make up etc.) from moisture, gases, smells etc, keeping them fresh as long as the liners are not removed.
Aluminum foil is widely used in many sectors of national economy and people’s daily life because of its light weight, good sealing and encapsulation, but it is mainly used in packaging, electromechanical and construction fields. Aluminum foil can be classified according to its thickness, shape, state or material.
Aluminum foil can be divided into thick aluminium foil, single zero aluminium foil and double zero aluminium foil according to thickness difference.
Thick foil: Aluminum foil with thickness of 0.1-0.2 mm.
(2) Single zero foil: aluminium foil with thickness of 0.0lmm and less than
(3) Double zero foil: The so-called double zero foil is the aluminium foil
whose thickness is less than 0.0075 mm, which has two zero foils after decimal
point when its thickness is measured in mm. When expressed in English, thick
aluminium foil is called “heavy gauge aluminium foil”, single zero aluminium
foil is called “medium gauge foil” and double zero foil is called “light gauge
foil”. Aluminum foil with thickness less than 40 LTM is sometimes called light
gauge foil in foreign countries, while aluminum foil with thickness greater than
40 BTM is collectively called heavy gauge foil.
Aluminum foil can be divided into aluminium foil roll and aluminium sheet
foil according to its shape. Aluminum foil deep-processed wool is mostly
supplied in rolls. Only a few handicraft packaging occasions use aluminium sheet
Aluminum foil can be divided into hard aluminium foil, semi-hard aluminium
foil and soft aluminium foil according to its state.
(1) Hard foil: Aluminum foil without softening treatment (annealing) after
rolling and without degreasing treatment, the surface is marked with residual
Shantou. Therefore, the hard aluminium foil must be degreased before printing,
bonding and coating. If it is used for forming, it can be used directly.
(2) Semi-hard aluminium foil: Aluminum foil whose hardness (or strength) is
between hard foil and soft foil is usually used for forming.
(3) Soft foil: Aluminum foil softened after full annealing after rolling,
with soft material and no residual oil on its surface. At present, soft foil is
used in most applications, such as packaging, composite, electrical materials
and so on.
Aluminum foil can be divided into one-sided and two-sided according to its
(1) One-sided glossy aluminium foil: double rolled aluminium foil, after
coiling, one side is bright, – face is black, such aluminium foil is called
one-sided glossy aluminium foil. The thickness of one-sided aluminium foil
usually does not exceed o.025mm.
(2) Two-sided aluminium foil: single rolled aluminium foil, two drawings
contacted with rolls. The two sides of aluminium foil can be divided into mirror
two-sided aluminium foil and common two-sided aluminium foil because of the
different surface roughness of rolls. The thickness of dihedral aluminium foil
is generally not less than 0.01mm.
Aluminum foil can be divided into plain aluminium foil, embossed aluminium
foil, composite aluminium foil, coated aluminium foil, colored aluminium foil
and printed aluminium foil according to the added state.
Plain aluminium foil: Aluminum foil rolled without any other processing, also
known as light foil.
(2) Embossed aluminium foil: Aluminum foil with various patterns on the
(3) Composite aluminium foil: Aluminum foil and paper, plastic film,
cardboard bonded together to form a composite aluminum foil. Coated foil:
Aluminum foil coated with various resins or varnishes.
Coloured aluminium foil: The surface is coated with a single color of
Printing aluminium foil: Aluminum foil, which forms various patterns,
patterns, words or pictures on the surface by printing, can be a color, up to 12
Aluminium kitchen foilis produced by rolling aluminum through a continuous mill which makes the aluminum thinner and longer.Thick aluminium foil reduced through this process and the aluminum product is wound into a coil at the end of the production line. These coils are then cold rolled in cold rolling mills. The coils can be heated in a furnace to soften it for further cold rolling or to produce the mechanical properties desired. (more…)