Articles about harm of aluminium foil, especially household foil used for cooking, have never come to an end. Even really strong-minded people could be upset about the endless talking filling your life circle. We dare not guarantee that aluminium foil is definitely safe, but we can offer figures and advice.
The application of aluminium foil in food packaging has over a century’s history. As early as 1911, a Swedish Sweet company first adopted aluminum foil to wrap its chocolates, which marked the beginning of the foil’s use in food and cooking. Up to now no clear evidence shows that people get disease from this.
There is no hidden danger to any food. Aluminum foil is a metal substance, it is not toxic, nor does it chemically react with the oil, salt and other spices in the food. However, it is worth noting that if you want to use tin foil or aluminum foil to wrap the ingredients for grilling, do not add seasoning sauce, because the acidic substances in the seasoning may melt the tin and aluminum of the tin foil and aluminum foil, which may cause aluminum poisoning after eating.
Finally, when using aluminum foil for cooking, it is recommended to choose heavy duty aluminum foil. The thin aluminum foil may attach to the food and be swallowed down, which will cause a chemical reaction with gastric acid in the body. The aluminum salt produced is directly absorbed by the body, which is harmful to the body.
Generally, aluminum foil paper cannot be used in a microwave oven. Although the supermarket has special aluminum foil paper, be careful. As long as the oven is in the microwave state, it is not possible to heat utensils with metal. Therefore, when aluminum foil-packaged food is heated in the furnace, sparks will be generated when the aluminum foil contacts the inner wall. The more times, the mica flakes in the furnace cavity will burn black, and may even break down the magnetic supply tube. So you have to pay to repair your microwave oven or even replace it with a new one. It is not worthwhile to spend money to repair the microwave oven for a piece of aluminum foil.
However, if your microwave oven has a grill function, you can put aluminum foil in the microwave oven. When the light wave combination, grill button, and combination grill button are turned on, it can be used to grill chicken wings, grill egg tarts, etc. Roast chicken is mainly wrapped around the easy-to-cook parts of the wing tips and heads to prevent them from being burnt. Aluminum foil is mainly used for roasting, but it has no other effect. Therefore, you can just use aluminium foil pieces in an ordinary baking oven for safety’s sake.
Aluminium foil strip is used as air conditioner aluminium fin strip because of its advantages such as low density, good thermal conductivity, easy processing, tasteless, environmental protection and low price. The heat exchanger of air conditioning also develops to ultra-thin and high strength. In the 1980s, the thickness of the heat exchanger sheet was 0.15-0.2ram, but today it is only 0.09-0.15mm. Classification is as below.
Uncoated aluminum foil refers to the rolled and annealed aluminum foil without any form of surface treatment. Ten years ago in China and 15 years ago in foreign countries, all the aluminum foils used for air conditioning heat exchanger were uncoated. About 50% of the heat exchanger used in developed countries are still uncoated aluminum foil, while in China, the ratio is about 60%.
2. Coated aluminium foil strip
The so-called coated aluminum foil is to re treat the surface of uncoated aluminum foil, so that it has a special function. In Japan, Germany and other countries with rapid technological development, coated aluminum foil has been used for more than 15 years. In China, the time of using coated aluminum foil is less than 10 years. According to the characteristics of the coated aluminum foil surface, it can also be classified as follows:
3. Corrosion resistant aluminium foil strip
The surface of the corrosion-resistant aluminum foil product has a certain corrosion-resistant protective layer. The air conditioning heat exchange sheet made of the product can be applied to the worse areas, and can significantly improve the service life of the air conditioning. At the same time, due to the improvement of the corrosion resistance of the heat exchanger, the formation of corrosion powder on the surface is greatly reduced, thus improving the ventilation quality and purifying the air in the air conditioning room.
4. Hydrophilic aluminum fin strip
The surface of hydrophilic aluminum foil has strong hydrophilicity. The hydrophilicity is determined by the angle formed by water sticking to the surface of aluminum foil, as shown in Figure 1. The smaller the a angle is, the better the hydrophilicity is; otherwise, the worse the hydrophilicity is. Generally, angle a is less than 35. It belongs to hydrophilic property. Hydrophilic aluminum foil is generally used in evaporator of air conditioner. The main function of the utility model is to make the moisture in the hot air easily spread and flow down the sheet when it condenses on the heat exchange sheet into water drops. In this way, the ventilation effect of the heat exchanger can be avoided due to the “bridging” of the water drops between the heat exchange sheets, so as to improve the heat exchange rate of the air conditioner, and save electric energy under the condition of the same cooling capacity. Before, the general hydrophilic aluminum foil in the market has not only good hydrophilic surface, but also high corrosion resistance, which makes the performance of air conditioning more optimized.
5. Hydrophobic aluminium foil strip
Hydrophobic aluminum foil is also called water repellent aluminum foil. Its surface performance is opposite to hydrophilic aluminum foil. That is to say, when the condensate condenses to the surface of the aluminum foil, the contact angle with the 36 wide aluminum coil stock foil is relatively large, generally at 75. above. The larger the angle, the better the water repellency. The ultimate goal of using hydrophobic aluminum foil is the same as that of hydrophilic aluminum foil, that is, not to let the condensed water stay between the heat exchange sheets. The difference is that the hydrophobic aluminum foil can remove the condensation water between the heat exchanger sheets by increasing the contact angle between the condensation water and the heat exchanger sheets, so that the condensation water can form water drops which are easy to slide.
6. Self lubricating aluminum foil fin strip
In the process of processing and manufacturing, the air conditioner heat exchanger generally needs to add lubricating oil to its surface, then punch and flanging, and finally wash the lubricating oil with trichloroethylene. Because trichloroethylene is harmful to human body, in order to reduce this process, self-lubricating aluminum foil is produced accordingly. As the name implies, the self-lubricating aluminum foil does not need to be added with lubricating oil alone when it is processed, and the lubrication during the processing is undertaken by the pre-treatment film on the surface of the aluminum foil. Since no special lubricating oil is needed, the subsequent cleaning and drying process of trichloroethylene is also omitted.
7. Mould proof aluminum air conditioner foil
Mould proof aluminum foil is mainly used for indoor unit of air-conditioning. Its main function is to prevent the surface of heat exchanger from mildew due to long use or placement time, so as to significantly improve the ventilation quality of air-conditioning, prevent the generation of abnormal smell, and effectively improve the indoor environment of air-conditioning.
The use of aluminium foil in food packaging includes that in food containers, food bags and sealing liners. This scope alone covers almost all alloys of aluminium foil rolls, including 8011, 8006, 8021, 8079, 3003 and even 5052.
Why is the food packaging aluminium foil winning so much popularity? Checking out the list of advantages of an aluminium foil related to food packaging: nontoxic, heat insulating, moisture proof, light shielding, excellent for composite, perfect sealing, friendly to ink and so on.
Here is a brief introduction to the use of aluminium foil in food packaging
8006 aluminium foil for food packagingreaches the brush A grade, the plate shape is flat, the surface is clean and no oil. Haomei 8006 aluminum foil is suitable for aerospace wrinkle-free lunch boxes. After stamping, the edges are free of wrinkles and the appearance is smooth and smooth.
5052 aluminium foil food packaging is one of the commonly used aluminum
foil lunch box raw materials.
8021 aluminium foil for food packaging has excellent moisture resistance,
shading and high barrier properties. Non-toxic, tasteless and hygienic, the
aluminum foil is widely used as a packaging material after after compounding,
printing and coating.
8079 food packaging aluminium foil boasts a high strength, a good
elongation and a good stretchability. 8079 aluminum foil has the advantages of
moisture-proof, air-tight, shading, abrasion resistance, fragrance preservation,
non-toxic and tasteless, and it is easy to process beautiful patterns and
patterns on its graceful silver surface. Because of this, it’s favored by people
in food packaging, pharmaceutical packaging, battery soft packs and other
8006, 3003 and 8011 are all used in aluminium foil, the difference are as
followed. 8006 lunch box aluminum foil has high strength and is hot rolled. 3003
aluminum foil and 8011 aluminum foil have low strength and are cast. The
elongation and cup convex value of 8006 aluminum foil are higher than 8011, 3003
lunch box aluminum foil. The tensile strength of the 8006 container foil is 10
MPa higher than that of the 8011 aluminum foil, which is slightly lower than
that of the 3003 aluminum foil.
If you want to buy aluminium foil from professional aluminium foil suppliers, you are recommended to learn some basic knowledge about the classification of aluminium foil rolls. Generally there are two types of classification methods, the first is by alloy number, including 8011, 8021, 3003, 1070, 8079, 1235, 1145 etc. But owing to the fact that application scopes of these alloys usually overlap with each other, a second classification based on usages is popular, too. Details are as below.
After figuring out classifications, you should also learn some purchasing
tips if you want to buy aluminium foil rolls. First, ask more than two aluminium
foil suppliers about price and samples. Second, learn as more details in advance
as possible, like lead time, quality control, after sales service, payment term
etc. Third, learn something about currency ratio before putting an order, and
choose the best time when the ratio is favorable for you. And if you can learn
more about local financial knowledge which your supplier make as a base before
giving you an offer, you would harvest more than you expect.
Aluminium foil packaging and packing are more and more popular in industries like food process, pharmaceutics and cosmetics. Feature of excellent packaging aluminium foil are as below.
First, the surface cleanliness of an aluminium foil packing should be high, and the surface should be free from oily dust, and the surface tension should be high. When using a simple method, that is, when testing with distilled water, it should be completely wetted, and the surface tension should be above 72 mN/m. If the oil is severe, the composite fastness will not be high, especially after high temperature cooking, delamination will occur.
Second, the number of pinholes should be small. Originally, aluminium foil
rolls should be the best barrier material, but if there is a pinhole, the
barrier effect will be greatly reduced. Gas, moisture, and light will penetrate
directly and quickly, and the contents will deteriorate quickly. In general, the
thicker the aluminum foil, the less the number of pinholes.
Third, the texture of the aluminum foil packaging should be soft, not easy to break when folded, and have good toughness. Purchased aluminum foil should be stored in a dry state, and should not be placed for too long, should be used as fresh as possible to prevent aluminum foil from absorbing moisture and deterioration.
There are two types of aluminium foil packaging. One type is to wrap food or objects with aluminium foil jumbo roll (or made into aluminium foil trays or containers), the other with aluminium foil bags.
Aluminum foil paper is usually used for food packaging (such as aluminum foil paper tray). It is used to grill food like bean sprouts and sweet potatoes at a barbecue to avoid burning. Sometimes used for decoration. Modern aluminum foil paper is made of aluminum and can also be used as an aluminum electrode for electrolysis. There are also hair stylists who use perm foil to perm for guests. Some people also use aluminum foil to absorb the oil in the soup. Aluminum foil is also widely used for the barrier layer, heat exchange, and as an electrical conductor. Typically, aluminum foil used in paper bag beverage packaging and food packaging is only 6.5 microns thick. This thin aluminum layer is water resistant, savory, anti-bacterial and anti-fouling.
The other type of aluminium foil packaging, aluminum foil bags, are used as tin foil bags, pure aluminum bags, just called different methods. Aluminum foil bags are suitable for a wide range of applications. Aluminum foil bags have strong barrier properties, anti-oxidation, water resistance, moisture resistance, strong mechanical properties, high blast resistance and puncture resistance. The characteristics of strong tearing performance are favored by electronic products and food packaging industry, and the development momentum has been particularly rapid in recent years.
Core features: 1, good moisture, light and air barrier
2, good heat sealing, long shelf life, sealed tight.
4, dust-free production environment, 100% ketone-free benzene ink
production, perfect quality control system is the continuous quality assurance
for your authority.
With either type of aluminium foil packaging, the quality of aluminium foil
is very important. Haomei supplies aluminium foil jumbo roll, aluminium foil for
containers, household aluminium foil and aluminium foil for packaging of
medicine, food, cosmetics etc. Welcome to send inquiries!
The aluminum foil paper sheet is widely used in food, beverage, cigarette, medicine, photographic floor, household daily necessities, etc., usually used as its packaging material; electrolytic capacitor material; thermal insulation material for construction, vehicles, ships, houses, etc.; Silver lines, wallpapers, and various decorative labels for stationery and light industrial products. So why is aluminum foil so popular?
Among the above various applications, the most effective performance of the
aluminum foil sheet paper is as a packaging material. Aluminum foil is a soft
metal film, which not only has the advantages of moisture-proof, air-tight,
light-shielding, abrasion resistance, fragrance preservation, non-toxic and
tasteless, but also because it has an elegant silver-white luster, it is easy to
process beautiful patterns of various colors and The pattern is thus more
popular with people. In particular, after the aluminum foil is combined with
plastic and paper, the shielding property of the aluminum foil is integrated
with the strength of the paper and the heat sealing property of the plastic,
thereby further improving the shielding performance for water vapor, air,
ultraviolet rays and bacteria which are necessary as packaging materials. ,
greatly expanded the application market of aluminum foil. Since the packaged
article is sufficiently isolated from the outside light, moisture, gas, etc.,
the package is well protected. Especially for the packaging of retort foods, the
use of this composite aluminum foil material can at least guarantee that the
food does not deteriorate for more than one year.
In recent years, aluminum foil paper has been quite prominent in architectural applications, and it has been attached to the surface of the thermal insulation material to make it more convenient, clean and especially beautiful. But the effect of different kinds of aluminum foil paper is very different, such as fireproof and ordinary is not a grade.
In addition, aluminum foil sheet paper is light in weight, non-toxic and tasteless, and has the highest cost performance among similar products. Most importantly, aluminum foil is recyclable, which is an incidental feature that has nothing to do with the popularity of the industry, but indirectly contributes to environmental protection. Therefore, under the same conditions, we should give priority to the use of recyclable aluminum foil.