Dry ice insulation can keep the temperature of the object at MINUS 78.5 degrees, provided that the insulation conditions are good. Otherwise, once the dry ice is dissolved into a liquid state, it will evaporate or sublimate very quickly.

Dry ice is actually the condensate of carbon dioxide, which is a colorless and odorless gas with a melting point of -78.5℃ and a boiling point of -57℃.

Extended data:

Dry ice has a wide range of uses:

First of all, clean

It can be widely used in mold industry, petrochemical power industry, food and pharmaceutical industry, printing industry, automobile and ship industry, electronics and nuclear industry. , cleaning all kinds of equipment and components. ? Dry ice cleaning can effectively clean high-temperature equipment; The maintenance cost of external equipment and its basic equipment is reduced; Improving the safety of staff; Improve maintenance efficiency; Improve production efficiency.

Second, beauty

Some dermatologists treat acne with dry ice. This treatment is called cryotherapy because it will slightly freeze the skin. There is a frozen substance for treating acne, which is mixed with ground dry ice, and sometimes some sulfur is added. Liquid nitrogen and solid dry ice can also be used as cryotherapy materials. Cryotherapy can reduce inflammation. This method can reduce acne scars, but it is not used to remove scars.

Third, the food industry

Dry ice is added to the drink to make it cool and delicious. Dry ice is added when making ice cream, so the ice cream doesn't melt easily. When Shanghai is fresh, dry ice can be added to create a white smoke landscape and improve the banquet level. Seafood is frozen. Dry ice will not turn into water, which is cleaner than water-cooled storage.

Fourth, the field of refrigerated transportation.

Cryopreservation, medical use and transportation of special drugs such as plasma and vaccines. Long-distance and short-distance transportation of electronic cryogenic materials and precision components. High-grade food preservation transportation, such as high-grade beef and mutton.

Verb (abbreviation for verb) entertainment field

Widely used in stage, theater, film and television, wedding, celebration, party and so on. There are countless special effects classic plays made of dry ice in China and even in the world.

Sixth, the field of fire protection.

Dry ice is used to put out fires, such as some low-temperature fire extinguishers, but the application of dry ice in this respect is less, that is, the market level is low.

Reference source:

Baidu encyclopedia-dry ice