Aluminum foil for household use

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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:Is aluminum foil insulation materials easy aging?
Is usually not easy aging, aluminum foil has good gas barrier and light barrier effect. But depends on the environment of use, aluminum foil Insulated material is usually complex, not just aluminum, the center may also have a sandwich, the key is to see what the sandwich material.
Q:Is aluminum tape toxic?
Aluminum tape is nontoxic. It uses quality pressure-sensitive adhesives (PSAs) and has various characteristics such as good stickiness, aging resistance and enhanced thermal insulation. Aluminum foil tape with all the seams of the aluminum foil composite paste, the seal and insulation nails puncture wounds repair.
Q:What is the thermal insulation principle of aluminum tape?
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 wrap with heat-insulated cotton before wrapping with aluminum foil. Actually the thermal insulation cotton preserves heat rather than the aluminum foil which serves as a conductor to outside temperature to protect the inside temperature. It is featured by thermal insulation, waterproofness and corrosion resistance. Due to its extremely low absorption coefficient solar radiation, it can isolate from most of the heat transfer.
Q:Why the aluminum foil should have anneal craft
The metal hardness processing is making the hardness higher and the ductility worse. it needs to revert to the anneal to press the aluminum.The process needs to have anneal several times.
Q:Which sides do we use when conducting the electricity.
Millions of tons of aluminum foil paper is used worldwide for food package,toiletry and chemicals.most of the aluminum paper is bright for one side,and non-bright for the other side. the food can be wrapped for the two sides of paper.But I suggest that using the bright side of paper to wrap the food to improve the effect of heat conduction.the primitive tin paper is really made of tin and the tin paper is a little harder than aluminum foil. it may also bring tin smell to the food.after the aluminum price declining, the aluminum foil takes the place of tin paper in daily life.however, due to the aluminum is harmful to the brain, the present aluminum foil is painted with special layer in case of the release of aluminum.aluminum foil paper is usually used for holding food(aluminum foil paper plate) and wraping the bean sprouts and potato.
Q:What is carbon coated aluminum foil?
Original aluminum conductive properties of the metal itself is already good, but for the greater enhance its conductivity, people invented a carbon-coated aluminum foil. Carbon-coated aluminum foil is referring to the conductive graphite and carbon nano-coated tablets, uniform, delicate coated on aluminum foil, aluminum foil once put on such "nano coat", it will be able to collect micro-current of the active substance and greatly reduce negative resistance between the poles, the static conductivity to maximize the performance.
Q:What causes the velocity effect of the aluminum foil?
3, the material is softened deformation of the rolling process. High-speed aluminum foil rolling mill speed, with increasing rolling speed, rolling temperature deformation zone opened higher, according to calculate the temperature of the metal deformation zone can rise to 200 ℃, it is equivalent to a middle of the recovery annealing, thereby causing processing the rolled material softening.
Q:what do aluminum 613 and 615 stand for?size? material or producing craft?
They are just the model numbers, no other meanings.
Q:What is the chemical nature of the aluminum foil is?
It is actually aluminum. Silver-white light metal aluminum. Extensible. Goods often made rod, sheet, foil, powder, ribbon and silky. The humid air to form an oxide film layer to prevent metal corrosion.
Q:Find a weld and riveting machine to connect the two roll of aluminum together. the width of aluminum is 40-60cm,because the surface of aluminum has a layer of oxidation film,so...
I am a high voltage professional welder. I can't endure the current surge,even the spot welding. the surface oxidation film can be baked by the cutting knife,or polish by the abrader. no matter how big the welding rod is useless.The aluminum is too thin.

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