foil airconditional

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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:How to use the bright surface and non-bright surface when having a barbeque.
The non-bright surface is used for putting the food,and the bright surface can reflect the light.The bright surface can fasten the speed of food cooking and save the energy. 
Q:How to remove words on aluminium foil used in medicine package? Is there any easy way?
Words printed on it is organic matter and can be corroded by concentrated sulfuric acid. Since aluminium plate is protected by oxidation film in its appearance, it's ok to do so. But you should be careful when you operate for plastic plate may also be corroded. Only teflon and high density polyethylene are anti-corrosion, but they are with higher price and therefore won't be used in normal situation.
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.
Q:Does aluminum foil bag have property of X-ray proof?
Lead is the best material of property of X-ray proof.
Q:How aluminum foil is uesd in food packaging?
Flexible packaging of aluminum foil is the use of soft composite packaging material bag container, flexible packaging technology has greatly improved mechanization and automation level food and beverage industry to speed up the modernization and socialization process of people's eating habits.
Q:Is heated aluminum foil gasket toxic?
No, a lot of baked food use aluminum foil.
Q:What's the use of aluminum tape?
It is used for fire resistance. Aluminum tape is made by pasting aluminum foil, glass fiber cloth and silicone paper with acrylate adhesive by using unique techniques. It is often used in thermal insulating and fire resistant surface of HAVC air-line system, sealing the puncture of bar for line and damage repairing of fire resistant aluminum foil glass fiber surface and thermal insulation of automobiles, train carriage and ship pipelines.
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:Why is the aluminum foil in the lithium ion battery eroded ?
High voltage (above 5V) might cause erosion of aluminum foil, but it is impossible for lithium ion battery whose voltage ceiling is 5V. In fact, the erosion is caused by HF produced by the electrolyte decomposition, especially when the water in the battery is not enough. While charging, capacitance works as electrolytic tank and aluminum as the negative pole. As the electrons flows through external circuit, aluminum will not react with the electrolyte (aluminum loses electrons)
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.

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