Foil package for aluminum

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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%.


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.


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:Which sub-item should be applied when choosing choose suitable composite aluminum foil rubber & plastic thermal insulated pipe?
Since wrapping aluminum foil glass fiber cloth with 40mm rock wool in roof thermal insulation belongs to pipe thermal insulation, you should apply the quota sub-items "Fiber products(pipe skin) installation" , "Glass wool cloth protection layer" and "aluminum foil protection layer" in the fascicle "Oil-painting, anti-corrosion and thermal insulation project" in "Installation quota ".
Q:Aluminum foil insulation material
Aluminum foil usually compound with sound insulation cotton and sound insulation rybber. It is a thermoprinting material by calendering aluminum into a plate. Its thermoprinting effect is similar to that of silver coil thermoprinting, thus it is alos called fake silver coil. Because of its softness, malleability and silver gloss, teh calendered plate can be processed into a alumnium foil plate by pasting something like solidium silicate on the offset paper and also can be printed.However, since the color of alumnium foil may dark as a result of oxidation or fade due to friction or touching, thus it is not suitable for thermoprinting long-preserved book cover.
Q:What's the application of double-sided conductive aluminum tape?
1. Aluminum tape is rolled tape by compounding anti-sticking paper and quality aluminum foil which is coated with acrylic adhesive, thus featured by strong adhesion high temperature resistance and aging resistance. It is used for fixing evaporating pipes of refrigeration equipment such as air conditioner, freezer, etc. 2. By padding a layer of glass wool, it is used for thermal insulation of automobile. Generally speaking, it is the less reflective material used in air-conditioning refrigerator.
Q:What specification does air hose of aluminum foil have?
The installation methods and standards of air hose of aluminum foil composite sandwich board. 1.construction preparation 1.1 The construction supervisor must be familiar with air hose, air inlet arrangement plan, design requirements and related specification and rules. He or she should also know air hose, air inlet making and installation technology and confide a technological secret to group leader. 1.2 According to construction progress, the supervisor should make a demand planning of board and other auxiliary materials and exam the implementing. 1.3 Before the construction, the quality inspetor should take a complete inspection to construction equipment and maerial. Only when everything is qualified, can workers start. What's more, the corresponding record should also be made. 2. Construction process.
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 classify air conditioning aluminum foil?
3.corrosion-resistant aluminum foil Corrosion-resistant aluminum foil surface of the product has a certain anti-corrosion protection layer, air-conditioning heat sheet made with this product are applicable to more serious areas, and significantly improve the life of air conditioning. At the same time due to the heat transfer sheet to improve the corrosion resistance, greatly reducing the generation of surface corrosion powder, thereby improving the quality of ventilation, air-conditioned indoor air purification.
Q:Which fields need to use aluminum tape?
Aluminum tape is used to joint paste all kinds of aluminum composite material like sealing of puncture site of insulation supporting pin and restoration of damaged area, which is the main raw and auxiliary material of freezer manufacturer and the must-have material of distribution departments for thermal insulation material. The product is widely used in fields like refrigerator, air conditioner, automobile, petrochemical industry, bridge, hotel and electronic industry. Copper foil.
Q:What are the advantages of aluminum foil boxes?
Light weight products, products meet national standards of food hygiene. And recycling convenient, in the process there is no 'harmful substances, and does not pollute renewable resources. Aluminum lunch boxes for aviation product line more food and retail food cake, update speed consume larger quantities. For a bulk sale. Cake cooking grocery and finished food packaging are multiple use foil container. Market wide, wide popularization.
Q:How to seal the fourth side at home after buying the three-side-sealed aluminum foil bag.
Q:Does reflective coating of aluminum-foil paper can be pasted to the glass?
Reflective coating of pure aluminum foil has a low heat conductivity coefficient,high heat transfer rate. Staple bolt is easily to be penetrated. Staple bolt penetrates reflrctive coating and rapidly recover after meeting high temperature.The heat energy of place where staple bolt penetrates can reflect the roof,making the construction easier and more efficient. The drape is easily to be flattened. Crease lines can influence the effect.Using reflective coating of common mirror,adopting PAP aluminum-plastic slice and staple bolt easily to be penetrated

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