Second,
1, the laundry should be checked for any parts or parts that are not suitable for dry cleaning.
2. Use a special dry cleaning machine for dry cleaning. Its specific structure usually varies with the solvent. Tetrachloroethylene is still the most common solvent. In addition, there are various hydrocarbon solvents such as petroleum and liquid carbon dioxide.
4. After the solvent is finally rinsed clean, empty the outer rotating cage, and then the inner rotating cage starts to rotate (the rotation speed is generally 350-450 rpm), and the clothes are dried by centrifugal force. Then hot air is introduced, and the residual solvent is volatilized during the rotation of the inner rotating cage.
5. The dirty solvent in the dry cleaning process is purified and recovered through filtration, adsorption and other processes. The remaining residue still contains a small amount of solvent, which will cause pollution if it is directly discharged into nature, so it needs further treatment.
First, most fabrics can be dry-cleaned in principle. But dry cleaning needs to be carried out in a dry cleaner with special equipment, which is more inconvenient and expensive than washing.
Dry cleaning is suitable for materials that are not suitable for water: for example, wool and leather are easy to shrink and deform when exposed to water, and some silk products are easy to fade when exposed to water and conventional detergents.
Materials such as plastics and artificial leather can be dissolved in some common organic solvents, so dry cleaning requires special solvents.
There may be traces of solvent residue in clothes after dry cleaning, so underwear and sheets should not be dry-cleaned with toxic and irritating solvents.
In addition, although dry cleaning does little damage to the fabric, particularly fragile clothes (such as clothes decorated with a lot of unstable ornaments) still need to be washed by hand to avoid damage.
Second,
Dry cleaning originated in Paris, France, so people often call it "French dry cleaning". ?
The main characteristics of dry cleaning are to avoid the damage of washing to fabrics, not shrink, not deform, good color protection, not easy to cause clothes to fade, soft to the touch, easy to iron and can thoroughly clean oil stains or stains on clothes.
Dry cleaning is suitable for fabrics that are not easy to wash and fade. It has the advantages of preventing fabric fibers from being deformed, keeping the original color of the fibers, and prolonging the wearing life of clothes. Dry-cleaned clothes also have the special functions of disinfection, sterilization, not easy to be eaten by insects and easy to store.
2065438+0717127 October, the list of carcinogens published by the International Agency for Research on Cancer of the World Health Organization was preliminarily sorted out for reference, and dry cleaning (occupational exposure) was on the list of Class 2B carcinogens.