can 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‘s the highest temperature aluminum foil can withstand?
It can be inferred if they are oxidized, may end up not aluminum foil, aluminum oxide. Touch may be a powder. Aluminum foil because of its excellent characteristics, widely used in food, beverages, cigarettes, pharmaceuticals, photographic plate, household items, etc., generally used as packaging materials; electrolytic capacitor materials; buildings, vehicles, ships, houses and other insulation materials; also as a decorative gold and silver, as well as all kinds of stationery printed wallpaper and decoration trademark and other light industrial products. In the various applications, it can most effectively foil performance points is as a packaging material.
Q:Which sub-item should be applied when choosing choose suitable composite aluminum foil rubber & plastic thermal insulated pipe?
Rubber & plastic thermal insulated casing pipe should be applied to the corresponding sub-item in "Supplementary quota project" in "Thermal insulation project", which is also the special sub-item. Rubber & plastic thermal insulated casing pipe should be applied to the corresponding quota sub-item in "Rubber & plastic thermal insulated pipe skin" in "Thermal insulation project". If there is no corresponding quota sub-item in "Rubber & plastic thermal insulated pipe skin", the quota sub-item "Thermal insulation of fiber pipe skin" may be an alternative and then you can convert the principal material into "Unit price of rubber & plastic thermal insulated pipe skin".
Q:What is the most important flaw of aluminum foil?
Although many types of defects in aluminum foil rolling, but in the end mainly as: A hole is characterized by a pinhole, roll eyes, slits, airway; to surface conditions characterized by oil, gloss uneven oscillation marks, tension lines, water spots, highlights bright spot; to processing procedures after the impact plate shape, wrinkling, discounts, bad winding; characterized by thick in size and poor. In essence, the unique aluminum foil pinhole defects only one category, several other defects plates also have different manifestations or severity only requirement is different.
Q:Why continuous annealing aluminum foil production process?
Metal has a "hardening" of the problem. Aluminum after rolling hardening will occur. In this case, the hardness becomes higher ductility deteriorates, re-annealed to a soft state in order to further rolling.
Q:Is aluminum foil insulation materials easy aging?
Just use little water vapor in the environment, not long-term high temperature, such as near the melting point of aluminum, usually you do not have this aging said. Aluminum foil can be used for thermal isolation at high ambient temperatures.
Q:How dose cable aluminum foil work?
Almost with foil tape, cable foil mainly using aluminum foil shielding and sealing ability of electromagnetic signals. For cable foil, it is generally not very high, less oil surface, no holes in it, just one side of an aluminum foil or plastic film coated on both sides, the cable can be used as a protective cover.
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's the relationship among aluminum strip,aluminum foil and aluminium alloy strip?
They have no including relationship.
Q:Aluminum corrosion resistance is mainly reflected in what areas?
Corrosion resistance is mainly reflected in three aspects: First, alkali resistance, since the surface of lubricating oil required alkaline cleaner to remove the punched sheet after the heat exchanger, the functional requirements of the aluminum foil surface coating must have a certain alkali resistance generally requires soaking in a 20% NaOH solution for 3 minutes without blistering;
Q:What's the difference between tin foil and aluminum foil?
Tin foil paper and aluminum foil paper in the supermarket have no difference (You can read the material description). What used for barbecue is aluminum foil which is often called Tin foil paper in the past (People at that time have never seen foreign items and as the aluminum foil is similar to tin foil, so they believe it is tin foil. )

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