air conditioning 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.

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%.


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Q:What are the advantages and disadvantages of aluminum foil packaging?
Aluminum foil advantages: Aluminum foil having a shiny metallic luster, decorative; non-toxic, tasteless, odorless; relatively light weight, the proportion is only one-third of iron, copper, full extension, thin, low weight per unit area; blackout good, reflective rate of 95%; protection and strong, so the package less susceptible to bacteria, fungi and insects infringement; high and low temperature stability, temperature -73 ~ 371 ℃ without deformation sizing;
Q:What's the difference between aluminum laminated films and aluminum foil film?
Aluminum laminated film is thin film like PP and PET steamed by vacuum and then coated with aluminum. Aluminum foil film is a film that is compounded by aluminum foil and plastic film. The alumimum coated layer is very thin with the thickness of 300-400 angstrom while the thickness of aluminum foil is about 0.01mm.
Q:What's the function of aluminum foil glass wool felt?
Glass wool belongs to one category of glass fiber and is a kind of manmade inorganic fiber, using quartz sand, limestone, dolomite and other natural mineral as the main raw material, and chemical raw materials like soda, borax, etc, as auxiliary material. Then in the melt state, it is flung into cotton-like entwined O-fibers with external blow.
Q:What's the shiny alluminum foil?
Rubber resin ink industry generally adopts two kinds of rubber resin, namely, chlorinated rubber and thermopren. Natural rubber can be considered as shiny alluminum foil. Unmodified epoxy resin can be used as a light cover and aluminum foil coating.The epoxy resin can react with amine or reactive polyamide,organic acid,carbimide,phenol,aldehyde, melamine and formaldehyde resin to generate a soft film.
Q:What are the classification of aluminum foil compound insulation material?
There are a variety of insulation materials with wide application. The commonly used ones include glass cotton products, heat insulation blankets and heat-insulated foam glass, polyurethane foam glass, etc. The glass cotton products are used in air conditioning insulation, duct insulation, polyurethane foams, extruded polystyrene board, molding of polystyrene, Bakelite resin, mineral fiber products, polyphenyl granule size, compound wood, soft wood, etc. Polyurethane foam is currently a kind of insulation material with minimum coefficient of heat conductivity of 0.018~0.024W/(m·k)in building insulation.
Q:Is the aluminum-foil paper flame retardant?
The aluminum-foil paper is a bond paper made by aluminum foil backing paper and aluminum foil.The main material is aluminum.The pure oxygen of aluminum is 550 degree. When burning aluminum, an oxidation film will form in the air,making the burning become difficult.
Q:The advantages and disadvantages of waterproof aluminum film and aluminum foil
1.Now there are no waterproof aluminum foil roll in the standard of waterproof material. The self viscous reel material is a kind of aluminum.The SBS asphalt roll is a kind of material. the thickness of aluminum influence the function of the roll and it can be comparized without standard.2. aluminium film is aluminizing on the PE or PET. the intrinsic quality of aluminium film is plastic film. it is generally out of use two years later and completely lose the reflection function.3.aluminum foil is a kind of very thin metal aluminum. it is usually be used together with the PE plastic film because of it will be broken easily.some producers will buy the pure aluminum foil and add a layer of plastic film, which will not be broken when in use.4.because of the aluminum as a sheet metal, the strength of roll will be improved. as for the aluminum foil of modified asphalt membrane,although its endurance can be longer than aluminum film,with the time increasing, the aluminum foil will have chap and oxidation and the sa
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:How to prevent aluminum foil from wrinkling?
Due to the strip shape is serious bad, folding formed in the process of aluminum foil coiling or expanding. Its essence is that its tension is not enough to make the box surface flattening. For a device with the tension of 20 mpa, the box surface flatness shall not be greater than 301. When it is more than 301, it will wrinkle inevitably. Due to the rolling aluminum box often bear the bigger tension than follow-up processing, some aluminum foil that just show the bad strip shape when rolling turn to wrinkle when cutting or used after annealing. Main reasons of wrinkling are due to poor flatness controlling, including incorrect roll grinding ,unreasonable roll shape controlling, unreasonable parameter controlling of rolling and cutting process, bad incoming material strip shape and incorrect strip shape adjusting and imperfect precision of sleeve or tube core. Main reasons of wrinkles: The large amount of pressure make the rolling uneven or coiling lack tension. Improper controlling of roll shape or rolling pressure is too low; Uneven thickness of billet, bad flatness or shear wave. Winding shaft precision is not good and the sleeve is not round. Improper control of pressing roller pressure.
Q:What is air conditioning aluminum foil?
Air conditioning is gradually to small, high-performance, high-life direction. The air-conditioning heat exchangers and thin sheet corresponding to the high strength direction. 1980 heat sheet thickness 0.15-0.2ram, and now only the thickness of between 0.09 to 0.15mm.

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