What is dry cleaning? Clothes dry cleaning
1. What is dry cleaning?
Dry cleaning is washing clothes without water. It only uses solvents to remove oil stains or stains. Since the solvent contains almost no moisture, it is called dry cleaning.
2. The basic steps of dry cleaning are:
The first step is pretreatment, that is, stain removal treatment. It is the pre-treatment of seriously contaminated dirt and insoluble stains in dry cleaning agent with artificial additives.
The second step is the main washing. The pretreated laundry is placed in an industrial dry cleaner, fully washed with a dry cleaning solvent and dried.
The third step is post-processing, the main purpose is to remove the residual dry cleaning solvent and ironing shaping in the clothes.
3. How many types of dry cleaning solvents are there? What are their advantages and disadvantages?
There are three main categories, which are:
A, chlorinated hydrocarbon synthesis solvent, the most commonly used is tetrachloroethylene, it is safe, degreasing and decontamination ability, but it has a strong corrosive effect on metals, its hydrolyzed main substance is toxic, causing harm to soil, water quality and human body. In addition, it has a relatively strong dissolution effect on plastics, nylon and other products, so such accessories must be removed when washing. B, chlorofluorine solvent, its typical representative is trichlorotrifluoroethylene, etc., it is non-toxic, non-flammable, non-corrosive to rubber and many chemical fibers, and the cleanliness is higher than that of tetrachloroethylene. However, such solvents destroy the ozone layer of the atmosphere and have been banned.
C. Petroleum solvents, with good washing effect. Clothes washed with such solvents do not have the peculiar smell of tetrachloroethylene washing, and do not pollute the human body and the environment. In the past, it was eliminated because of its poor safety. Now with the development of science and technology, safety has been solved, so it is more and more favored by dry cleaning owners.
4. A few specific questions about dry cleaning
What kind of clothes are not suitable for dry cleaning?
Polypropylene clothing, rubber products, artificial leather, paint accessories, metal ornaments, glued velvet products.
Does regular dry cleaning shorten the lifespan of clothes?
No, on the contrary, regular dry cleaning will prolong the life of clothes, because washing first makes the fibers of the clothes expand, which makes the fibers brittle, resulting in a reduction in the life of the clothes. Dry cleaning with industrial dry cleaners will not make the fibers of the clothes expand, and dry cleaning machines, especially petroleum solvents, will not penetrate into the fibers, so it will not cause the clothes to become brittle and will not affect their life. Furthermore, stains on clothes will affect their life for a long time, and once they are stained with fine dust or other small particles of dirt, they will wear down the fabric fibers as quickly as sandpaper. In addition, bacteria such as robes attached to the dust can further damage the clothes.
Can dry cleaning kill bacteria?
Yes, but not all bacteria. Generally speaking, microorganisms on clothes can be divided into germs, caterpillars, robes and parasites. In the process of dry cleaning with an industrial dry cleaner, germs, caterpillars and moth larvae can be killed due to the role of the dry cleaner. For robes, it can be peeled off from the clothes by mechanical force, and then separated by a filter. For lice, it can be killed, but because of its strong adhesion, it cannot be separated from the clothes.
D. Do dry cleaning clothes shrink?
No. Only in the dry cleaning process is normal and appropriate, the clothes will not shrink. If shrinkage occurs, one is because the original clothing manufacturer did not do a good job of pre-anti-shrinkage processing, and the other is that moisture is mixed into the industrial dry cleaning machine.
