Hotel linen cleaning technology analysis

First, make a classification treatment before washing to make washing more targeted.

1, according to the color of linen: different colors of linen at the same time may cause mutual contamination, and different colors of the same kind of linen processing methods are not the same;

2, according to the degree of grass dirt classification: generally divided into heavy dirt, medium dirt, light dirt three categories;

3, according to the categories of grass dirt classification: This classification method is for the grass in the use of special dirt, and processing these special dirt, the effect of conventional methods is not obvious, the need to use special methods to deal with. If it is a common treatment with the same general dirt degree table cloth, it will only cause a large amount of backwash and cause waste;

4, according to the cloth texture classification: such as cotton sheets, cotton sheets, etc. must be treated separately. Generally the same dirt sheets, pure cotton than polyester cotton to spend longer time, higher temperature, a larger proportion of cleaning supplies.

Therefore, the treatment according to the classification of the cloth texture helps to increase productivity and save costs.

Second, choose a reasonable ratio of targeted detergents.

Third, according to the selected detergent combined with linen material and equipment conditions design washing program.

When designing the program, in-depth analysis should be conducted on the selection of water quality, the condition of the fabric being washed, the type and degree of contamination on the washed fabric, the washing chemicals, the washing equipment, and the water level.

Fourth, pay attention to the use of bleach technology.

The process of bleaching the grasscloths of Jinlanlai is indispensable for the bleaching process. The bleachable stains of the washed objects can be removed and have good whiteness. This depends on the strong oxidation of the bleaching agent, but the bleaching process is also a process that endangers the service life of the fabrics. Therefore, handling the bleaching process is one of the key factors to control the loss of linen.

Fifth, the washing machine should be a reasonable load, do not exceed the standard.

The washing formula affects the service life of the sheets. Clothing received by the IFI Apparel Analysis Laboratory generally shows degradation of cotton fibers. Chemical tests showed damage to oxidized cellulose. The oxidized cellulose is formed when the cotton is degraded in the air by a basic oxide such as bleach. Many of these damaged sheets show bleach residue on the sheets. This indicates that the cleaning is insufficient or that the amount of bleach used in the detergent formulation is too large.

Excessive use of oxygen bleach during commercial washing is responsible for the formation of oxidized cellulose. Whitening bleaching is very good, but the premise is that the amount should be appropriate. It is recommended that adding 1% bleach at a concentration of 0.95 Kg per 45 Kg of laundry can extend fabric life and improve the quality of the wash. It is this concentration of bleach that must also be thoroughly neutralized and cleaned.

In general, polyester (50%) cotton (50%) blended sheets can be washed 120 times. 100% cotton sheets, like yarn and weight, have a shorter life expectancy. Another way to extend the useful life is to purchase sheets that are equal in hemming. If the edge size is the same, you can use it with both ends, so that the wear is even.

Question: After washing, it was found that rust stains have not been removed. What is the cause of this? Is it related to detergent or water quality? What methods can be used to avoid the above problems?

Answer: Acidification treatment is the last process in the laundry process. The pros and cons of acid agents are very important in laundry products. It can make up for the defects and defects in previous processes and make the washed objects perfect and reach an ideal realm. Some laundry rooms use oxalic acid, which is inadequate. In the non-softened water, calcium oxalate precipitates are formed and adsorbed on the fabric to make the fabric gray, hard and brittle. Removing rust with oxalic acid is not only temporary, but also temporary. This reaction Fe+++ (tan) Fe++ (light green) is a reversible reaction. Fe++ remaining on the fabric is dried, and soon the air is oxidized and turned back into Fe+++. Only the addition of other acid complexing agents or other oxalic acid is used. In addition to iron rust compounds, they form a stable complex or chelate to remove.

Question: What is the best value of PH during washing? How to detect the PH value in laundry cloth; the range of PH value is?

Answer: The definition of PH value: to measure the degree of pH, take the log10n of the hydrogen ion in solution, n is the number of hydrogen ions in 1 litre, the amount is 1-14, 7 is neutral, more than 7 is the alkali Sex, less than 7 is acidic.

In the washing process, the optimal value is 6-8 from the viewpoint of protecting the fabric, but in order to increase the degree of cleaning of the fabric, it is preferably between 8 and 9, and another advantage is to alleviate the bleaching speed when bleaching. For heavy dirt washing clothes, the PH value is preferably between 9.5 and 11. If alkali is used, a synthetic base with a buffering agent should be used to increase the ability to remove oil dirt and alkali-soluble dirt.