Aluminum foil for pharmaceutical 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:What is foil bags vacuum cooking?
Retort pouch is a composite plastic film bag can be heat-treated, it has two plastic containers and cans of boiling water resistant advantages. Food can be left intact in the bag, high temperature (usually in the 120 ~ 135 ℃) heating sterilization, remove and serve. After ten years of using proven, it is an ideal packaging container sales.
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:Is the aluminum foil tape resistant to high temperature?
The aluminum foil tape is resistant to high temperature. It is mainly for binding ducts. Heat-resisting and weather-proof are its basic properties. Aluminum foil usually can resist temperature over 300 and most of the tape can resist temperature about 180. As aluminum foil itself conducts heat, it will speed up the loss of heat. Therefore, before wrapping the aluminum foil, you can put some thermal insulation cotton inside.
Q:How aluminum foil is uesd in food packaging?
Depending on the purpose of the use of flexible packaging. Flexible packaging not only with moisture, fresh effect, but a variety of printable patterns and text, is an ideal material for modern commercial packaging. With the improvement of people's living standards, as well as flexible packaging foil much room for development.
Q:What are the advantages of aluminum foil?
Compositing aluminum foil thermal insulation material uses the latest international technology of rubber and plastic modification and introduces world-leading technology and equipment of permanent aluminum foil composite, which is rubber and plastic compositing thermal insulation material of international advanced level.
Q:Can aluminum foil be put in microwave oven?
Because microwave cannot penetrate metal, it is not recommended to use aluminum foil unless using lighwave baking only. Microwave produces current in inner metal, then the current will form electric arc in the point to cause sparks which is not that dangerous. Any metal products cannot be put in the microwave oven. It is recommended to use light wave stove which has gained a wide popularity in that metal products can be put in it.
Q:Can aluminum foil replace copper foil?
You mean the static electricity isolation layer in transformer. Yes, it can do that. Be careful and don't make it short circuit. It also can be used in other operating layers, but you should be careful in calculating electric current density.
Q:What's the difference between PTP aluminum foil and conventional soft packing used aluminum foil?
PTP aluminum foil can't resist high temperature while conventional soft packing used aluminum foil does.
Q:How to remove the oxide layer in the aluminum foil with a chemical process?
Aluminum is easy to react with oxygen in the air, so even if you remove the aluminium oxide in the surface, it will soon be oxidized again.
Q:How to test the withstand voltage of capacitance?
Simple test:the two aluminium lead wire rolled up like the electrician high-voltage shaking unit(produce high voltage)and voltmeter and capacitance connected in parallel like revolving unit to the measurement and read the voltmeter. The voltage should be higher than withstand voltage. take the advantage of capacitance aluminium of restoring and measurement.

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