If you want to use dry ice to clean the meltblown cloth mold, you must first understand the formation principle and basic knowledge of dry ice. The secularization of solid carbon dioxide is known as dry ice. So how did it come about? At room temperature, it will go directly from solid to gas. While carbon dioxide gas is invisible, the unusually cold gas causes water vapor in the air to condense into water droplets, creating fog.

The temperature of a piece of solid carbon dioxide (dry ice) is minus 78.5 degrees Celsius. Once this temperature is reached, the carbon dioxide sublimates into a gas directly around the liquid. One pound of dry ice can produce 250 liters of carbon dioxide gas! If you heat a block of dry ice, such as by placing it in warm water, it will sublimate more quickly. The fog that appears to fall from a block of dry ice is actually not carbon dioxide itself, but water vapor in the air, condensed by the cooling of the carbon dioxide. This effect will be more pronounced in warm and humid air. Therefore, directly putting dry ice into warm water will not only accelerate its sublimation, but also produce a large amount of fog, resulting in a stage smog effect.

In a sealed container above minus 78.5 degrees Celsius, sublimation of dry ice will generate a lot of pressure. In the setup in the video, pressure forces a nozzle immersed in a soap solution to expel gas, creating fog and carbon dioxide foam.

If dry ice is applied to the Dry ice cleaning machine, the principle is that dry ice particles the size of rice grains are sprayed onto the surface to be cleaned at high speed (supersonic speed).

In addition, there are the following three principles.

Thermal shock shock: The temperature difference between the pollutant and the surface of the object (-79°C cold shock), the surface of the dirt is quickly cooled to -79°C by dry ice particles, resulting in the freezing and embrittlement of the dirt, and the ability to adhere to the cleaned surface is sharp decline.

Mechanical kinetic energy: dry ice particles hit the dirt surface at high speed, usually the speed of dry ice exceeds the speed of sound. Dry ice pellets have low hardness (2 on the Mohs scale) at high speeds and will not damage surfaces.

Physical Sublimation: Dry ice particles sublimate when in contact with the surface to be cleaned, i.e. the dry ice changes from a solid to a gaseous state. The volume of dry ice pellets increases by 800 times. This explosive effect does not damage the surface being cleaned, but the dirt is removed by being blown apart. The particles carry the contaminants and lift them off the surface without damaging the surface. The entire process produces no water and requires no chemicals.

Dry ice blasting technology has many advantages, such as technical advantages, such as no need to deal with blasting materials, can be used under electric power, can be cleaned online, no material shrinkage, no abrasion, dry ice particles can only remove dirt, environmental protection (because there are no chemicals and solvents) wait.

The cleaning process using dry ice opens up a new and little-known field of application in today's cleaning technology. The dry ice blasting process has almost unlimited applications. Nowadays, dry ice blasting technology has been actively used in the following fields: cleaning machines, release agent removal, cleaning tools...Dry ice blasting technology has brought convenience to human society and is a very valuable technology.

The above content is the principle of dry ice cleaning meltblown cloth mold, I hope it can be helpful to everyone. If you want to know more about dry ice blasting, please call the dry ice blasting manufacturer and Fengli Dry Ice, we will serve you wholeheartedly.