How is the liner of a thermos bottle formed

How is the liner of a thermos bottle formed?

The structure of the thermos flask is not complicated. There is a double-layer glass bottle in the middle. The two layers are evacuated and plated with silver or aluminum. The vacuum state can avoid heat convection. The glass itself is a poor conductor of heat. The silver-plated glass can radiate the inside of the container outwards. The heat energy is reflected back. In turn, if a cold liquid is stored in the bottle, the bottle prevents heat energy from outside from radiating into the bottle.

The stopper of a thermos bottle is usually made of cork or plastic, both of which are not easy to conduct heat. The shell of the thermos bottle is made of bamboo, plastic, iron, aluminum, stainless steel and other materials. The mouth of the thermos bottle has a rubber gasket and the bottom of the bottle has a bowl-shaped rubber seat. These are used to fix the glass bladder to prevent collision with the shell. .

The worst place for a thermos bottle to keep heat and cold is around the bottleneck, where most of the heat circulates through conduction. Therefore, the bottleneck is always shortened as much as possible during manufacture. The larger the capacity and the smaller the mouth of the thermos bottle, the better the insulation effect. Under normal circumstances, the cold drink in the bottle can be kept at 4 in 12 hours. c around. Boil water at 60. c around.

Thermos bottles are closely related to people’s work and life. It is used to store chemicals in laboratories and to store food and drinks during picnics and football games. In recent years, many new styles have been added to the water outlets of thermos bottles, including pressure thermos bottles, contact thermos bottles, etc. But the principle of thermal insulation remains unchanged.