What is the principle foil tape insulation?

What is the principle foil tape insulation?

There are thermal insulation, waterproof, moisture and other functions. Its solar radiation absorption coefficient is very low, most of the heat transfer can be separated.

Three modes of heat transfer is convection, conduction, radiation, usually wrapped in aluminum foil tape outside the insulation layer, the surface of silver with barrier heat radiation. Aluminum foil itself is a good conductor of heat, wrap directly on top of the insulation is basically not play a role, but also accelerate the loss of heat, so use the time in which some insulation cotton wrapped, then wrapped in aluminum foil. Foil is actually conducting the outside temperature, the temperature inside to protect from outside influence, in fact, is the thermal insulation of cotton.

Aluminum foil itself is a good conductor of heat, wrap directly on top of the insulation is basically not play a role, but also accelerate the loss of heat, so use the time in which some insulation cotton wrapped, then wrapped in aluminum foil. Foil is actually conducting the outside temperature, the temperature inside to protect from outside influence, in fact, is the thermal insulation of cotton. There are thermal insulation, waterproof, moisture and other functions. Its solar radiation absorption coefficient is very low, most of the heat transfer can be separated.