Is Aluminum Foil a Good Conductor?

Is Aluminum Foil a Good Conductor?


Foil is collapsible and can be quickly twisted or placed around items. Thin foils are brittle and are often laminated to make them thicker and better for other materials like plastic or parchment.

aluminum foil insulation
Aluminium foil is constructed of aluminium in thin metal blades less than 0.2mm wide; smaller gauges down to 6 microns are also widely used. In the US, foil is usually measured in thousandths of an inch or mile. Regular household foils are usually 0.016mm wide, usually 0.024mm medium-sized household foils. Foil is collapsible and can be quickly twisted or placed around items. Thin foils are brittle and are often laminated to make them thicker and better for other materials like plastic or parchment. In the mid-20th century, aluminum foil replaced tin foil.

In 2003 Europe produced about 800,000 tons of aluminum foil per year, and the United States produced 600,000 tons per year. About 75% of aluminum foil is used in poultry, cosmetics, and pharmaceutical manufacturing, and 25% is used in industrial uses (such as thermal insulation, cables, and electronics).

For radiation channels (boundary and reflectivity), power exchangers (power conduction), and wire linings (obstruction and conductivity), aluminum foils are often used. Due to its amazing malleability, aluminium is used for bundling: it can be quickly turned into a thin sheet of aluminium and folded, rolled, or bundled. Aluminium foil completely blocks light and oxygen, odors and tastes, and moisture, which breeds bacteria, so it is often used for bundling of nutritional and pharmaceutical products, including extensive bundling (aseptic bundling) of beverages and dairy products, without the need for refrigerated storage. Compartments and foil boards For making treats and preparing dinners for transport, wholesome treats, and long-distance pet nutrition.

Aluminum foil insulation

To be precise, aluminum is a very weak insulator. It performs well on fire. Even so, it does represent radiant heat, for which it is used to make emergency blankets ("space blankets") for walking. Metals do have to be in contact with a hot object to conduct electricity. If they are not, their reflective effect on fire (radiation) dominates.

Space covers are usually made of plastic (a strong insulator) with a metal coating. The fact that foil is a poor insulator also makes no sense, since plastic can insulate you.

The main function of a foil emergency blanket is to trap dust, a strong insulator, and avoid (sweat) evaporation. If the blanket is transparent, it usually reflects radiant heat from your body back to you. This usually stands for solar power, but if you're using an emergency mountaineering jacket, you're more likely to worry about staying warm at night than during the day.

Even throughout the day, if the sun is so low that you need an aluminum foil emergency blanket, I think it's more useful to buy one that reflects your body's heat back to you than a black one that absorbs sunlight, especially since the blanket is to avoid heat conduction and is made more of plastic so even a black blanket won't absorb any heat. When radiant heat reaches the air, it can't be safely brought back through the insignificant remains of the blanket anyway.

A blanket made of something like wool but waterproof would probably be much better, but definitely harder to wear in an emergency.

The same idea applies to vacuum bottles. Substrates that have been partially separated from the air (vacuum) or other materials provide shielding to avoid thermal conduction. The metal surface emits radiant heat and is contained in the flask.

The above briefly describes whether aluminum foil is a good conductor. If you want to know more or want to buy custom aluminum foil, please contact us.

PENGYUAN is a professional custom aluminum foil coating manufacturer, we have 3 vacuum coating machines, and 8 PE extrusion coating production lines, guided by 6S management system. PENGYUAN supplies more than 360 million square meters (tons) to customers around the world every year. With wider and deeper cooperation, PENGYUAN will continue to focus on the development and manufacture of extrusion coating technology. Committed to becoming an advanced energy-saving new material and solution provider.