Aluminum foil is the perfect packaging material

Because of its excellent characteristics, aluminum foil is widely used in food, beverage, cigarettes, pharmaceuticals, photographic substrates, household articles, etc. It is usually used as packaging materials; electrolytic capacitor materials; insulation materials for buildings, vehicles, ships, houses, etc. It can also be used as decorative gold and silver wire, wallpaper and decorative trademarks of various stationery, printing products and light industrial products. In all the above applications, the most effective way to develop the performance of aluminium foil is as packaging material. Aluminum foil is a soft metal film, which not only has the advantages of moisture-proof, air-tight, shading, wear-resistant, fragrance-preserving, non-toxic and tasteless, but also because of its elegant silver-white luster, easy to process beautiful patterns and patterns of various colors, so it is more likely to be favored by people’s aluminum foil tape.

With the improvement of people’s living standards and the development of tourism, the demand for beer, soda and other beverages and canned food is increasing day by day, which requires modern packaging and decoration to facilitate competition in the international market. In order to meet the market requirements, people have developed good shielding plastic film and spray foil packaging materials, but their comprehensive properties are not as good as coating and lamination processing can be made up and improved.

After aluminum foil deflector beanie is compounded with plastics and paper, the shielding property of aluminium foil is integrated with the strength of paper and the thermal sealing property of plastics, which further improves the shielding properties of water vapor, air, ultraviolet ray and bacteria, which are necessary for packaging materials, and greatly expands the application market of aluminium foil. Aluminum foil manufacturer is well protected because of its full isolation from light, humidity and air outside. Especially for the packaging of cooked food, the use of this composite aluminum foil material can ensure that food does not deteriorate for at least one year. Moreover, heating and unpacking are very convenient and popular with consumers.

Therefore, it can be said that aluminium foil is a kind of perfect packaging material with many excellent properties, which fully shows its broad application prospects in many fields. In order to improve rolling efficiency and quality of heavy duty aluminum foil products, modern aluminium foil rolling mills are developing in four directions: large coil, wide width, high speed and automation. The roll width of contemporary aluminium foil mill has reached more than 2200 mm, the rolling speed has reached more than 2000 m/min, and the coil weight has reached more than 20 t. The automation level of the rolling mill is also greatly improved. AGC is generally installed, and AFC is mostly installed. Aluminum foil industry is facing a period of rapid development.

Classification of aluminum foil in details

Aluminum foil is a kind of very thin aluminium coil, strip or sheet obtained by rolling aluminium and aluminium alloy strip coil. Aluminum and aluminium alloy sheets and strips with thickness less than 0.2mm are generally referred to as aluminium foils.

Classification of aluminium foil:

According to the shape, it can be divided into rolled and flaky aluminum foil. Aluminum foil products are mostly supplied in rolls, and only a few handicraft packaging users use aluminum foil sheet.

According to the thickness, it can be divided into three kinds: thick aluminum foil, single zero aluminum foil and double zero aluminum foil. Thick foil is 0.1-0.2mm thick foil, single zero foil is 0.01mm thick foil and less than 0.1mm thick foil, double zero foil is thickness of the decimal point after two zero foil.

(3) According to the state, the main foils are hard aluminum foil, soft aluminum foil, semi-hard aluminum foil, one quarter of hard foil and three quarters of hard foil.

(4) According to the surface state, it can be divided into single-sided aluminum foil and double-sided aluminum foil.

(5) According to the use, it can be divided into packaging aluminum foil, commodity aluminum foil, electrical equipment aluminum foil and construction aluminum foil.

Properties of aluminium foil:

Aluminum foil has thin and light material, high specific strength, good gloss, high thermal conductivity and conductivity, high moisture-proof, non-toxic, tasteless, good optical rotation, thermal insulation and good corrosion resistance.

Aluminum foil for electromagnetic shielding

The shielding effectiveness of aluminium foil depends upon the type of incident field (electric, magnetic, or plane wave), the thickness of the foil, and the frequency (which determines the skin depth). Shielding effectiveness is usually broken down into a reflection loss (the energy bounces off the shield rather than penetrates it) and an absorption loss (the energy is dissipated within the shield).

Aluminum foil for electromagnetic shielding:

Excellent High Frequency RF Shielding characteristics

Effective barrier against Low Frequency AC Electric Fields when grounded.

Electrically Conductive

Weather Resistant

Can be used as a Vapor Barrier – not breathable

Heavy Duty / Tear Proof

Flexible and light weight which allows for an easy installation

Safe to handle and non-toxic

Although aluminium is non-magnetic, it is a good conductor, so even a thin sheet reflects almost all of an incident electric wave. At frequencies more than 100 MHz, the transmitted electric field is attenuated by more than 80 decibels (dB) — however actual energy absorption is minimal: the remaining high-frequency rf energy is almost perfectly reflected from uniform flat aluminium surface, and thus, reflected signal may continue to propagate internally, and if holes or passages of suitable geometry exist in the shield, signal propagation may continue out through those, the aluminium being good material for implementation of a microwave-frequency waveguide.

Thin sheets of aluminium are not very effective at attenuating low-frequency magnetic fields. The shielding effectiveness is dependent upon the skin depth. A field travelling through one skin depth will lose about 63 per cent of its energy (it is attenuated to 1/e = 1/2.718… of its original energy). Thin shields also have internal reflections that reduce the shielding effectiveness.For effective shielding from a magnetic field, the shield should be several skin depths thick. Aluminium foil is about 1 mil (25 μm); a thickness of 10 mils (250 μm) offers less than 1 dB of shielding at 1 kHz, about 8 dB at 10 kHz, and about 25 dB at 100 kHz. At these frequencies a ferromagnetic material such as mild steel is much more effective, due to different and complementary electromagnetic permeability properties, and common practical shielding implementations utilise both an inner high-frequency reflective material such as aluminium, preferably bonded (via annealing or electroplating, done to avoid capacitance between separated layers), to a more substantial structural ferromagnetic shell, usually mild steel (in specialized applications, more expensive, less structurally useful and less workable materials may be preferred.) Despite the relative low mass density of aluminium, this design is usually both lighter and more effective than an equivalently absorptive design utilizing aluminium alone.

Different aluminum foils have different effects

Aluminum foil is widely used in many sectors of national economy and people’s daily life because of its light weight, good sealing and encapsulation, but it is mainly used in packaging, electromechanical and construction fields. Aluminum foil can be classified according to its thickness, shape, state or material.

Aluminum foil can be divided into thick aluminium foil, single zero aluminium foil and double zero aluminium foil according to thickness difference.

Thick foil: Aluminum foil with thickness of 0.1-0.2 mm.

(2) Single zero foil: aluminium foil with thickness of 0.0lmm and less than 0.1mm/

(3) Double zero foil: The so-called double zero foil is the aluminium foil whose thickness is less than 0.0075 mm, which has two zero foils after decimal point when its thickness is measured in mm. When expressed in English, thick aluminium foil is called “heavy gauge aluminium foil”, single zero aluminium foil is called “medium gauge foil” and double zero foil is called “light gauge foil”. Aluminum foil with thickness less than 40 LTM is sometimes called light gauge foil in foreign countries, while aluminum foil with thickness greater than 40 BTM is collectively called heavy gauge foil.

Aluminum foil can be divided into aluminium foil roll and aluminium sheet foil according to its shape. Aluminum foil deep-processed wool is mostly supplied in rolls. Only a few handicraft packaging occasions use aluminium sheet foil.

Aluminum foil can be divided into hard aluminium foil, semi-hard aluminium foil and soft aluminium foil according to its state.

(1) Hard foil: Aluminum foil without softening treatment (annealing) after rolling and without degreasing treatment, the surface is marked with residual Shantou. Therefore, the hard aluminium foil must be degreased before printing, bonding and coating. If it is used for forming, it can be used directly.

(2) Semi-hard aluminium foil: Aluminum foil whose hardness (or strength) is between hard foil and soft foil is usually used for forming.

(3) Soft foil: Aluminum foil softened after full annealing after rolling, with soft material and no residual oil on its surface. At present, soft foil is used in most applications, such as packaging, composite, electrical materials and so on.

Aluminum foil can be divided into one-sided and two-sided according to its surface state.

(1) One-sided glossy aluminium foil: double rolled aluminium foil, after coiling, one side is bright, – face is black, such aluminium foil is called one-sided glossy aluminium foil. The thickness of one-sided aluminium foil usually does not exceed o.025mm.

(2) Two-sided aluminium foil: single rolled aluminium foil, two drawings contacted with rolls. The two sides of aluminium foil can be divided into mirror two-sided aluminium foil and common two-sided aluminium foil because of the different surface roughness of rolls. The thickness of dihedral aluminium foil is generally not less than 0.01mm.

Aluminum foil can be divided into plain aluminium foil, embossed aluminium foil, composite aluminium foil, coated aluminium foil, colored aluminium foil and printed aluminium foil according to the added state.

Plain aluminium foil: Aluminum foil rolled without any other processing, also known as light foil.

(2) Embossed aluminium foil: Aluminum foil with various patterns on the surface.

(3) Composite aluminium foil: Aluminum foil and paper, plastic film, cardboard bonded together to form a composite aluminum foil. Coated foil: Aluminum foil coated with various resins or varnishes.

Coloured aluminium foil: The surface is coated with a single color of aluminium foil.

Printing aluminium foil: Aluminum foil, which forms various patterns, patterns, words or pictures on the surface by printing, can be a color, up to 12 colors.

6063 6061 7005 7075 anodized flexible aluminum foil pipe

Aluminum foil is an economical solution for a wide range of industrial, manufacturing and consumer applications

Features: Waterproof, Fireproof,Leakproof, Moistureproof, Anti-interference

Aluminum foil pipe,provides excellent insulation: Reflects up to 97% of radiant energy in addition to resisting other types of heat transfer from conduction, convection and radiation. The two side anodized aluminum foil forms an effective barrier against moisture, air currents and vapors.

Application: Electromagnetic shielding, refrigetors, air conditioners,cars, subways, household decoration and other appliances.

Double-sided aluminum foil duct / thick aluminum foil pipe / exhaust pipe / telescopic tube / vent tube diameter 200mm * 8m

6063 6061 7005 7075 anodized flexible aluminum foil pipe

Temperature: -30 -80

Maximum air velocity: 30m / s

Maximum working pressure: 2500Pa

The actual length of up to 9 meters straightened

Features of aluminum foil pipe:

1, double-sided gold aluminum foil, more resistant to heat; bold steel, more durable

2, can be bent, convenient and flexible installation

[Application] is widely used in Bathroom, cafes, offices, a gym, a restaurant, conference rooms, hotels, guesthouses and other indoor ventilation.

Common specifications 60MM 80100 110 125 150 160 175 200 250 300 325 350 400 450 500 630, other specifications can be customized! (Quantity can be made in any length up to 15 m can be customized one)

Installation method of aluminum foil pipe :

The first step: The tube clamp set on standby (also available air conditioning tie)

Step two: a torn aluminum tube wire twice

The third step; tear wire belt wrapped around the outlet valve of the outer aluminum foil fixed

Step four: then the entire aluminum foil tape or duct tape glue laps (remember tearing stick better place to prevent leakage)

Step Five: In the clamp sleeve (or air conditioning tie) in the air where it is fixed

What thickness of aluminum foil for Packaging

Generally, the thickness of aluminum foil for Packaging is between 0.03 mm and 0.1 mm. This is because the packaged article is sufficiently isolated from the outside light, moisture, gas, etc., so that 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. Moreover, heating and unpacking are very convenient and are very popular among consumers.

This is related to the characteristics of aluminum foil.

Features of packaged aluminum foil:

The aluminum foil has a clean, hygienic and shiny appearance. It can be integrated with many other packaging materials, and the surface of the aluminum foil is better than other materials. In addition, the aluminum foil has the following characteristics:

(1) The surface of the aluminum foil is extremely clean and hygienic, and no bacteria or microorganisms can grow on its surface.

(2) Aluminum foil is a non-toxic packaging material that can be in direct contact with food without any concern that may endanger human health.

(3) Aluminum foil is an odorless and odorless packaging material that does not impart any odor to the packaged food.

(4) If the aluminum foil itself is not volatile, it itself and the packaged food will never dry or shrink.

(5) There is no oil penetration of the aluminum foil at high temperatures or at low temperatures.

(6) Aluminum foil is an opaque packaging material, so it is a good packaging material for products exposed to sunlight, such as margarine.

(7) Aluminum foil has good plasticity, so it can be used to package products of various shapes. It can also be used to create containers of various shapes.

(8) The aluminum foil has a large hardness and a large tensile strength, but its tear strength is small, so that it is easily torn.

(9) The aluminum foil itself cannot be heat-sealed and must be coated with a heat-sensitive material such as pe to be heat-sealed.

(10) When aluminum foil is in contact with other heavy metals or heavy metals, there may be adverse reactions.

How thick and application is aluminum foil

Aluminum foil rolls and sheets come in a variety of thicknesses, widths, and lengths. Manufacturers often make the width and length of the foil roll easy to find, but the thickness of the foil is often not advertised.

Household use standard duty aluminium foil rolls are often between 75 ft. and 250 ft. long, offered in a variety of widths. The majority of foil rolls labeled as “Standard Duty” are between .0004 thick and .0007 thick. Which at best is slightly over or one half of a mil in thickness.

Some users prefer a thin pliable foil for a variety of home use and commercial needs. Most standard duty or economy foils are often much more affordable than heavy duty or extra heavy duty foils. Some users do not prefer the standard duty foils because of easy tearing and burning when baking.

Heavy Duty Aluminum Foil – Many cooks use it for baking, grilling, and storage. Most Aluminum foil rolls labeled “Heavy Duty” are between .0008 thick and .001 thick.

Extra Heavy Duty Foil – A harder thickness to find, but some manufacturers do produce extra heavy duty foil. It provides excellent tear resistance and works well with everything the heavy duty and the standard foil is used for. Most aluminum foil labeled “Extra Heavy Duty” are between .0011 thick and .0016 thick.

Feasibility analysis of aluminum foil recycling

Is aluminum foil recyclable?Aluminum is one of the highest-value materials you can recycle, and it can be reprocessed into new aluminum in just 60 days.Aluminum is used for more than foil aluminum, of course. Cans, cars, even my laptop is made of aluminum. Aluminum compounds are used as catalysts in chemical reactions to make elemental sulfur and various hydrocarbons, which can be starting materials for making plastics, medicines, fertilizers, rubber products and more.

Aluminum foil thickness is made from the same material as soda cans (aluminum), but since it’s most often contaminated with food waste or combined with plastic (like with yogurt tops), there’s no guarantee you can recycle it with your aluminum cans.

Aluminum Foil Recycling Preparation,How to recycle aluminum foil?

You want to make sure that aluminum foil is as clean as possible before recycling. While burns and holes won’t affect the recycling market, you’ll want to remove any meats or sauces from the foil.

If you’re recycling aluminum foil that you bought and used for storage, separate the foil from the paperboard box and corrugated tube before recycling.

If foil is combined with other materials (such as in drink boxes, candy wrappers and yogurt tops) and can’t be separated, you’ll want to throw it away. Foil mixed with other materials is considered recycling contamination.

Combine all sheets of thick aluminum foil into one ball. This will keep the material easily separated from other products, and also prevent it from blowing away (aluminum foil is a very light material).

Your first step is to make sure your aluminum foil is devoid of food waste. You can rinse off small bits of food, like cookie crumbs and fruit or vegetable juice. The foil may discolor if you use hot water, but that is totally normal. If the foil is very heavily soiled with oily or greasy foods like meat, frosting, gravy or butter, it will need to go in the trash.

Your second step is to determine if your curbside recycling program accepts aluminum foil. you will need to find another way to recycle your aluminum foil. Before placing any foil in your recycling bin, crumple it into a ball so it will not get torn or stuck in the recycling machinery. Do not take each individual piece and ball it up so that you have several tiny spheres. Instead, save up your aluminum foil and make a ball that is at least two inches in diameter. And again, make sure it is clean before you place it in your recycling bin. Keep in mind that several food products come with aluminum foil pan attached. Many yogurt containers have aluminum foil over the lids. K-cups also have aluminum foil lids. If you can recycle sheets of aluminum foil, chances are high you can recycle these items as well. Check with your recycling company to see if they can take other types of clean aluminum food storage products, like pie pans and turkey roasters, too. I reuse my clean aluminum foil whenever possible.

The production and application of aluminum foil

Aluminum foil provides a complete barrier to light, oxygen, moisture and bacteria. For this reason, foil is used extensively in food and pharmaceutical packaging. It is also used to make aseptic packaging that enables storage of perishable goods without refrigeration. (more…)