Aluminum foil for package

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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.

Aluminium foil 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.

Aluminium foils thicker 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.

Aluminium foil has 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%.

We provide a full range of precision aluminum strip for almost any application. We produce aluminum strip in a wide variety of alloys, including clad composites. Our aluminum strip can be produced in standard dimensions or custom made to your special requirements. We produce both imperial and metric units. We manufacture in compliance with the main international specifications, and tighter tolerances or custom tempers are available upon request. We offer various surface conditions, custom finishes (painting, anodizing, embossing), special processing, and multiple packaging options to meet our customer's unique requirements. The following is a summary of our capabilities.

Manufactured in compliance with the main international specifications and standards, including:  Aluminum Association, ASTM, EN, and DIN.
We can also manufacture in compliance with other international standards including:ASME, SAE, AMS, AWS, FED, MIL, QQ, ISO, BS, AFNOR, JIS and GOST.

Manufactured in compliance with the main international specifications and standards.
Tighter tolerances are available upon request.

Aluminium (or aluminum; see spelling differences) is a chemical element in the boron group with symbol Al and atomic number 13. It is a silvery white, soft, ductile metal. Aluminium is the third most abundant element (after oxygen and silicon), and the most abundant metal in the Earth's crust. It makes up about 8% by weight of the Earth's solid surface. Aluminium metal is so chemically reactive that native specimens are rare and limited to extreme reducing environments. Instead, it is found combined in over 270 different minerals.The chief ore of aluminium is bauxite.

Aluminium is remarkable for the metal's low density and for its ability to resist corrosion due to the phenomenon of passivation. Structural components made from aluminium and its alloys are vital to the aerospace industry and are important in other areas of transportation and structural materials. The most useful compounds of aluminium, at least on a weight basis, are the oxides and sulfates.

Despite its prevalence in the environment, no known form of life uses aluminium salts metabolically. In keeping with its pervasiveness, aluminium is well tolerated by plants and animals. Owing to their prevalence, potential beneficial (or otherwise) biological roles of aluminium compounds are of continuing interest.

The earliest citation given in the Oxford English Dictionary for any word used as a name for this element is alumium, which British chemist and inventor Humphry Davy employed in 1808 for the metal he was trying to isolate electrolytically from the mineral alumina. The citation is from the journal Philosophical Transactions of the Royal Society of London: "Had I been so fortunate as to have obtained more certain evidences on this subject, and to have procured the metallic substances I was in search of, I should have proposed for them the names of silicium, alumium, zirconium, and glucium."

Davy settled on aluminum by the time he published his 1812 book Chemical Philosophy: "This substance appears to contain a peculiar metal, but as yet Aluminum has not been obtained in a perfectly free state, though alloys of it with other metalline substances have been procured sufficiently distinct to indicate the probable nature of alumina."[69] But the same year, an anonymous contributor to the Quarterly Review, a British political-literary journal, in a review of Davy's book, objected to aluminum and proposed the name aluminium, "for so we shall take the liberty of writing the word, in preference to aluminum, which has a less classical sound."

The -ium suffix conformed to the precedent set in other newly discovered elements of the time: potassium, sodium, magnesium, calcium, and strontium (all of which Davy isolated himself). Nevertheless, -um spellings for elements were not unknown at the time, as for example platinum, known to Europeans since the 16th century, molybdenum, discovered in 1778, and tantalum, discovered in 1802. The -um suffix is consistent with the universal spelling alumina for the oxide (as opposed to aluminia), as lanthana is the oxide of lanthanum, and magnesia, ceria, and thoria are the oxides of magnesium, cerium, and thorium respectively.

The aluminum spelling is used in the Webster's Dictionary of 1828. In his advertising handbill for his new electrolytic method of producing the metal in 1892, Charles Martin Hall used the -um spelling, despite his constant use of the -ium spelling in all the patents[58] he filed between 1886 and 1903. It has consequently been suggested[by whom?] that the spelling reflects an easier-to-pronounce word with one fewer syllable, or that the spelling on the flyer was a mistake.[citation needed] Hall's domination of production of the metal ensured that aluminum became the standard English spelling in North America.

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Q:Why the aluminum foil should have anneal craft
Anneal is to make the aluminum soft then its ductility becomes better.if not having anneal, the problem may appear unexpectedly like aluminum foil broken in the rolling process.therefore, the anneal must be conducted each time after rolling. this can help the aluminum rolling process goes plainly.
Q:Does the waterproof effect good if the SBS roll of aluminum foil used in conjunction
Generally speaking, the effect of SBS waterproof roll used in conjuction is better than a single laye.rwhen having the construction, the roll is playing the role of light-reflecting and heat-insulation.when the roll is used in conjuction, the second time should use the PE.
Q:What's the difference between non-backing aluminum foil and backing aluminum foil and what's the features?
Non-backing aluminum foil is the normal aluminum foil, a piece of foil, for example, the aluminum in a bottleneck of top-grade wine. There are tiny holes in the appearance and odor is easily to be leaked. But it is soft and can cover goods in any shape. Aluminum foil with backing: adding a film-like material in normal aluminum foil, for example paper to increase the strength and decrease the leak caused by the tiny holes in the appearence of aluminum foil. The most common example is the piece of thing in cigarette box.It ahs a good sealing performance, especially for odor. 20 years ago, I am the main operator of rough mill of aluminum foil. One machine costs more than 100 million and is with more than 170 kilowatt. It's a good experience of using it.
Q:What is the most important flaw of aluminum foil?
Pinhole major drawback of aluminum foil. Raw material, the upper roll, rolling oil, even to the dust in the air is about the size of 6μm enter the roll gap will cause pinholes, so 6μm foil pinholes is impossible, only the number and size of its evaluation. Due to improved foil rolling conditions, particularly dust and rolling oil effectively filter and convenient roll changing system settings, the number of aluminum foil pinhole increasingly dependent on the metallurgical quality of the raw material and processing defects due to pinholes often defects in materials shedding, it is difficult to find the correspondence between the original defects
Q:Who knows the price of phenolic-aluminum foil composite board?
Aluminum phenolic composite board ; One-sided phenolic composite colored steel board/ single phenolic composite colored aluminum foil board for center air-conditioning; A long-term supply for good quality phenolic foam thermal insulation board/phenolic aluminum board/insulation phenolic board; Double-sided extruded aluminum foil board/insulated board/ wind board; Phenolic aluminum foil insulation board/central air-conditioning ventilation board/floor heating panel; Phenolic aluminum board/ phenolic insulation board/phenolic aluminum composite blast pipe board/ fire-resisting blast pipe board/flange parts
Q:What's the maximum temperature that high temperature resistant aluminum tape resists?
As for aluminum tape, the aluminum foil can resist high temperature of 300℃ and most tapes can resist temperature of 300℃. Since aluminum is a good conductor of heat, wrapping the tape with aluminum foil does quicken the heat loss instead of heat preservation. Therefore, it's better to use heat-insulated cotton.
Q:What are the differences among aluminum foil,pet,and hologaram paper
The aluminum foil is pressed and extended by pure aluminum;PET is a kind of plastic polyester film; hologram paper is made by PET film through processing and painting a layer and pressing,then the electroplated aluminum layer be composited with the paper and last remove the PET.
Q:It is an alloy of aluminum foil?
Because aluminum is soft, ductile, with silver-white luster, if the sheet after the rolling, sodium silicate and other material mounted in offset paper made of aluminum foil, but also for printing. But the aluminum foil itself is easily oxidized and darkened, friction, touch, etc. will fade, so does not apply to long-term preservation of stamping book cover or the like.
Q:What's the aluminum-foil bag? What's the purpose of it? Is it poisonous? Can it be uesd in food industry?
Aluminum-foil bag is a kind of bag that using the ductility of aluminum and pressed by machine. There are some poisonous metal bags like external packing of capsule,capsule mounting and packing box of milk products.
Q:Does the aluminum foil can be effective in the environment of temperature 430 degree?
The melting point of aluminum is 660.4 degreeand the boiling point is 2467 degree.The aluminum foil has heat resistance.aluminium oxide is white powder and covalent compound, with melting point 2050℃ and boiling point 3000℃.

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