How is dry cleaning done?
How is dry cleaning done? Dry cleaning only uses solvents to remove oil stains or stains because solvents contain almost no water. As for the steps of dry cleaning, they are as follows:
The first step is pretreatment. Dry cleaning requires pretreatment, that is, removing stains. Dry cleaning refers to the artificial use of additives to remove seriously polluted dirt and stains insoluble in dry cleaning solvents, such as juice, nail polish, paint, ink, etc. For pretreatment, water is not needed, but the clothes are coated with solvent first, and then washed with water.
The second step is the main washing. Dry cleaning requires a dry cleaning machine. Put the pretreated clothes into a dry cleaning machine, wash them thoroughly with dry cleaning solvent and spin them dry.
The third step is post-processing. The main purpose of this step is to remove the residual dry cleaning solvent and iron, so that the clothes can be shaped.
How about dry cleaning the clothes?
Dry-cleaning clothes is not good for clothes, because tetrachloroethylene is the most commonly used solvent among the dry-cleaning reagents that are popular and widely used in the market at present, and it is a toxic substance. If it remains in clothes, it will be harmful to human health.
1, the solvent used for dry cleaning clothes is not only harmful to clothes, but also has a negative impact on human health. Generally, the dry cleaning machine in a small laundry can't achieve the cleaning effect, and the clothes after dry cleaning will leave toxic substances, such as tetrachloroethylene.
2. Not all clothes are suitable for dry cleaning. Dry cleaning is mainly washing by chemical reaction, which is easier to remove oil stains than washing, and clothes are not easy to deform and shrink after washing. Some clothes contain polyester material, which will dissolve when it meets tetrachloroethylene.
To sum up, dry cleaning is not good for clothes.
The difference between dry cleaning and washing
The difference between dry cleaning and water washing is that the former uses solvent to dry clean clothes; The latter is more environmentally friendly in washing clothes. The specific differences are as follows:
1, from the environmental point of view
Dry cleaning requires a dry cleaning machine and solvent treatment. After washing clothes, there will be residual oil containing tetrachloroethylene, which is volatile and will pollute the air.
Water washing is mainly water, which is a relatively environmentally friendly method. Nowadays, green laundry is advocated, and water washing, a recognized ecological washing, is the most environmentally friendly compared with dry cleaning.
2. In essence.
The advantage of dry cleaning is that you can wash some unwashed clothes. Mainly reflected in dry cleaning clothes, do not shrink, do not fade, do not bubble, do not deform. For example, some clothes made of protein fiber and viscose fiber may shrink after washing.
The scope of application of washing includes cotton, linen and synthetic fiber fabrics from the perspective of clothing fibers. For example, cotton fiber belongs to fiber bundle fiber, which has strong adsorption capacity for stains, and can be washed because of its small shrinkage.
The above is the difference between dry cleaning and water washing.
The difference between dry cleaning and drying
The difference between dry cleaning and drying: the former works by washing clothes with organic chemical solvents to remove stains; The latter is that the inner cylinder is driven by a belt, and there is hot air around the drum to evaporate water, which is based on the principle of positive and negative rotation of the drum.
Dry cleaning uses organic chemical solvents, such as petroleum or tetrachloroethylene. However, after dry cleaning, these solvents may remain in clothes. However, this solvent is toxic and harmful to human body.
It is dried by a belt dryer and heated by a resistance wire. The high temperature makes the moisture on the clothes evaporate, and forms water drops when it meets the surface of the pipe network, and then it is discharged to the drying point.
That's the difference between dry cleaning and drying.