can alufoil ALUMINUM FOIL

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Aluminium foil acts as a total barrier to light and oxygen (which cause fats to oxidise or become rancid), odours and flavours, moistness, and germs, it is used broadly in food and pharmaceutical packaging. The purpose of aluminium is to make long-life packs (aseptic processing|aseptic packaging) for drinks and dairy goods, which allows storing without refrigeration. Aluminium foil containers and trays are used to bake pies and to pack takeaway meals, ready snacks and long life pet foods.

Alufoil is widely sold into the consumer market, often in rolls of 500 mm (20 in) width and several metres in length.It is used for wrapping food in order to preserve it, for example, when storing leftover food in a refrigerator (where it serves the additional purpose of preventing odour exchange), when taking sandwiches on a journey, or when selling some kinds of take-away or fast food. Tex-Mex restaurants in the United States, for example, typically provide take-away burritos wrapped in aluminium foil.

Itthicker than 25 µm (1 mil) are impermeable to oxygen and water. Foils thinner than this become slightly permeable due to minute pinholes caused by the production process.

Aluminiumhas a shiny side and a matte side. The shiny side is produced when the aluminium is rolled during the final pass. It is difficult to produce rollers with a gap fine enough to cope with the foil gauge, therefore, for the final pass, two sheets are rolled at the same time, doubling the thickness of the gauge at entry to the rollers. When the sheets are later separated, the inside surface is dull, and the outside surface is shiny. This difference in the finish has led to the perception that favouring a side has an effect when cooking. While many believe that the different properties keep heat out when wrapped with the shiny finish facing out, and keep heat in with the shiny finish facing inwards, the actual difference is imperceptible without instrumentation.The reflectivity of bright aluminium foil is 88% while dull embossed foil is about 80%.


Aluminium alloys with a wide range of properties are used in engineering structures. Alloy systems are classified by a number system (ANSI) or by names indicating their main alloying constituents (DIN and ISO).

The strength and durability of aluminium alloys vary widely, not only as a result of the components of the specific alloy, but also as a result of heat treatments and manufacturing processes. A lack of knowledge of these aspects has from time to time led to improperly designed structures and gained aluminium a bad reputation.

One important structural limitation of aluminium alloys is their fatigue strength. Unlike steels, aluminium alloys have no well-defined fatigue limit, meaning that fatigue failure eventually occurs, under even very small cyclic loadings. This implies that engineers must assess these loads and design for a fixed life rather than an infinite life.

Another important property of aluminium alloys is their sensitivity to heat. Workshop procedures involving heating are complicated by the fact that aluminium, unlike steel, melts without first glowing red. Forming operations where a blow torch is used therefore require some expertise, since no visual signs reveal how close the material is to melting. Aluminium alloys, like all structural alloys, also are subject to internal stresses following heating operations such as welding and casting. The problem with aluminium alloys in this regard is their low melting point, which make them more susceptible to distortions from thermally induced stress relief. Controlled stress relief can be done during manufacturing by heat-treating the parts in an oven, followed by gradual cooling—in effect annealing the stresses.

The low melting point of aluminium alloys has not precluded their use in rocketry; even for use in constructing combustion chambers where gases can reach 3500 K. The Agena upper stage engine used a regeneratively cooled aluminium design for some parts of the nozzle, including the thermally critical throat region.

Another alloy of some value is aluminium bronze (Cu-Al alloy).

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Q:Is it aluminum good or PVC plastic good for the refrigerator inner container?
The aluminum is good because it can preserve the temperature!
Q:The thickness of aluminum foil bag is 30 silks. Is it thick or thin?
It's very thick since the aluminum used in composite sluminum foil tape is 0.3mm.
Q:What are the differences among aluminum foil,pet,and hologaram paper
The methods to distinguish the pureness of aluminum foil paper:The color of 99.9% pure aluminum and hologram papershould be processed to the color like aluminium oxide.
Q:Does the waterproof effect good if the SBS roll of aluminum foil used in conjunction
The same material should be used in conjuction and the waterproof should be applied to the the construction.
Q:How does aluminum foil bag should be heat-sealed?
Using the sealing machine.
Q:Can you tell me how to use aluminum foil grill ?
It’s wrong! Aluminum foil will melt into the food at high temperature. When cooking no bone cooked meat such as sauce beef, stewed pork with brown sauce, spiced dog meat or used for vacuum packaging of chemical raw material, we choose aluminum foil. Tin foil is usually used for grilling. There are several reasons. 1, to prevent the food from sticking to the baking tray 2, to keep the food clean 3, the baking tray is easy to wash4, to keep the seasonings and stuffing together 5,to keep the food fresh.
Q:What temperature needed to keep the aluminium foil spray lacquer having the adhesive force
To judge the adhesive force of oil paint of aluminium paper,we should heat the double paint formulations and the curing agent of the lacquer to 80 degree and 150 degree.
Q:Does Aluminum foil glass fabric air duct need thermal insulation?
Phenolic-aluminum foil compound air conduct itself has good thermal insulation, due to the phenolic foam in between. It is a little expensive than galvanized steel sheet, but the latter one needs extra insulation. Not necessary. It has in-built insulation, light and easy to install. It is expensive than the galvanized steel air duct, but the latter usually needs the cost of thermal insulation material and labor. By the way, Phenolic-aluminum foil compound air conduct produces dust after using a period of time usually five years.
Q:What's the aluminum sheet and its features?
After been hot-rolled and cold-rolled, aluminum slabs with a thickness of above 0.3mm can be called as aluminium plate or aluminium strip(with a rolled shape); with a thickness of less than 0.3mm can be called as aluminium foil or aluminium foil strip(with a rolled shape). Aluminium foil is usually made of the type 1 or type 2 industrial aluminum. Aluminiym foil has all features of metal aluminium. Heat conduction, gasproof, light insulation and electromagnetic radiation shield are all important features.
Q:How to remove the oxide layer in the aluminum foil with a chemical process?
Generally, we adopt the method of alkali corrosion to remove the oxide layer on the surface of the aluminum foil.The purpose of alkali corrosion is removing the oxide layer on the surface of the aluminum foil. (Note: Technological process of the method is as follows: under normal temperature, 20% nitric acid; the process parameters is about 0.5 minutes. Pre-degrease--degrease--rinsing--rinsing--alkali corrosion--rinsing--rinsing--bright dipping--rinsing--rinsing--pure rinsing. The purpose of bright dipping is to remove surface residual black ash after alkali corrosion.Temperature:50-60 degrees; time:0.5-1 minutes.The purpose of degreasing is to remove grease on the surface of the aluminum foil.The process parameters is 0.5-1 minutes. You can use acid to wash it.

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