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The principle of vacuum lotion bottle is explained

Views: 71     Author: Site Editor     Publish Time: 2022-03-31      Origin: Site Inquire

The design principle of the lotion bottle is to use the contraction force of the spring and not to let the air into the bottle, resulting in a vacuum state, while using atmospheric pressure to push the piston at the bottom of the bottle forward. 

airless bottle

However, because the spring force and atmospheric pressure cannot give enough force, the piston cannot fit too tightly with the bottle wall, otherwise the piston will not be able to rise and advance due to excessive resistance; on the contrary, if the piston is easy to advance and easy to leak, so the vacuum emulsion bottle has very high requirements for the professionalism of the manufacturer.

The modern thermos bottle was invented by British physicist Sir James Dewar in 1892. At that time he was carrying out a research work to make gas liquefaction, gas to liquefy at low temperatures, first lotion bottle need to design a container that can make the gas isolated from the outside temperature, so he asked glass technician Berg for him to blow a double glass container, two layers of the inner wall coated with mercury.


Then the air between the two layers was drawn off to form a vacuum. This vacuum emulsion bottle, also called "Du bottle", can make the liquid held in it regardless of the cold and heat temperature remain unchanged for a certain period of time.

airless bottle

Because in the family insulation bottle is mainly used for hot water insulation, so also known as hot water bottle. Insulation bottle structure is not complicated. The middle is a double glass bottle liner, lotion bottle between the two layers into a vacuum state, and silver or aluminum plating, the vacuum state can avoid heat convection.


The glass of the bottle itself is a poor conductor of heat, and the silver-plated glass reflects back the heat energy radiated from the inside of the container to the outside. In turn, if the bottle stores cold liquid inside, this bottle can prevent the outside heat radiation to the bottle.

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