Laundry training manual (2)
Fourth, the classification of synthetic detergent
Strong detergent: mainly remove dirt-washing fabrics. For example: tablecloths, cooks and other service workers. PH value of more than 11.Washing temperature is 60 ℃ -90 ℃. (Jiajie high-strength bleaching detergent company Type A)
GM detergent: mainly washing light, dirt of the texture, such as bed sheets, and towels and clothing. PH value is 9-10. Washing temperature is 60 ℃ -80 ℃. (Jiajie high-strength bleaching detergent company Type B)
Neutral detergent: mainly washing silk and wool fabric type. PH value is 7. Washing temperature is 20 ℃ -50 ℃. (Jiajie companies effects Silky detergent)
Passenger and clothing detergent: washing mainly hotel guests’ clothes. PH value is 8-9. Washing temperature is 20 ℃ -50 ℃. (Jiajie companies effects enzyme detergent)
Emulsifier: The main supporting fabric detergent is to remove the oily dirt. PH value is 7 and washing temperature is above 50 ℃. (Jiajie company emulsifier)
Bleaching powder: in the washing process, bleaching powder has three roles: stain-removal, disinfection and maintenance of whiteness. Most of the dirt on the fabric is removed in the washing process by detergent. Only a litte of dirt need to be removed by the bleaching powder pigment. Bleaching powder includes two types that are chlorine bleaching and oxygen bleaching. Bleaching and oxygen powder are different in usage.
(1)Chlorine bleaching: mainly used for white fabric in removal of stains with temperature of 65 ℃ -70 ℃ and time of 8'-10 '. PH value is 10.2-10.8. Under such conditions, Shoule chlorine bleaching removes stains the most effectively. If the chlorine bleaching isn’t used well, it’s easy for the strength of fabric declined. (Jiajie company-Pa - chlorine bleaching powder)
(2)Oxygen bleaching: mainly used for color and white fabric in removal of stains with temperature of 70 ℃ -90 ℃, time of 8'-10 ' and pH value of more than 11. Under such conditions, oxygen bleaching stains are removed effectively. Compared with chlorine bleaching, Oxygen bleaching is mild. It damages the color fastness and intensity of the fabric so little that it’s widely used. (Jiajie Company Central Choi - oxygen bleaching agent)
At present, the majority of oxygen bleaching only can effectively remove stained at a high temperature. As to the fabric that cannot be washed under high-temperature washing can’t remove stains on the fabric effectively. So Jiajie Company’s low-temperature oxygen bleaching agent fills the gaps in this area.
Middle acid is mainly used for the final steps of washing procedure. Major function: Mixing the residual alkali in the washing liquid, inhibiting iron adhered on the fabric and adjusting the pH after washed, thus making fabrics bright and shiny white. The use of temperature is 45 ℃ -55 ℃ with time of 3'-5 ' and washed fabrics pH of 5.5-6.5. (Jiajie Crystal Company - neutralizer, rust net)
Softener: mainly used for dealing with the final steps of washing procedures. Primary role: to improve the hand feeling of washed fabrics, soft flu and reducing roughness. In the meantime, it takes role of lubrication and elimination of static. The temperature is 45 ℃ -55 ℃ with time of 4'-5 '. It can be used together with the acid. For the region contented the high iron should firstly add derusting acid. One minute later, add some softener. Excessive use of softener is easy to make white fabric become yellow and decline absorbent. (Company Roushun Ji Jia Jie)
Pulp powder is mainly used for the final step in washing procedures. A major role: Rendering the fabric strong aesthetic, improving hand feeling and prevent the dirt into the internal fabric. The temperature is 45 ℃ -55 ℃ and time is 5'-6 '. And it can be used with acid. (PVA Jiajie company of pulp powder).
Hard water softener: For hardness the high-water, if cannot installed softener equipment, softener can only be added in washing. Softener should be added in each step of washing, but in practical work, it’s hard to do like that. Only in the main washing and bleaching steps add softener before other raw materials. The temperature and time is decided by the role of the steps. (Jiajie soft water company)
Effects from the ash: long-term use of hard water-washed will result in white fabric turn to grey, which seriously affects the use of fabric. This product using the principle of reaction, to a certain extent, changes the color of fabrics, from gray to white gradually, so that the white fabric will be greatly improved. Temperature is 80 ℃ -90 ℃ and time is 15'-20 '(Jiajie effects from the ash of the company)
Fifth, the design of washing process
1, major steps of washing operation
(1) wash: using the force of water and the role of mechanical to remove the dirt on the water-soluble salt as much as possible, laying good foundation for the main decontamination wash. AS to the dirt-general, rinse step should be adopted in the washing. Using high water level with water temperature of 20 ℃ ~ 40 ℃, and 2 to 3 minutes drainage.
(2) Pre-wash: pre-washing is to join a appropriate detergent in pre-decontamination process. As the surface tension of water, water does not adequately wetting the dirt. In light of some seriously dirt, pre-election must be chosen. Pre-wash generally can be arranged after washing step and also be accessed to pre-washing process. The middle water level with water temperature of 40 ℃ ~ 50 ℃ and lasts 3 to 5 minutes.
(3) The main wash: water as media to the physical and chemical detergents, with appropriate concentration, temperature, sufficient time such a decontamination washing environment achieve decontamination effectively. In this process, based on fabric structure, the type of dirt and pollution should select appropriate decontamination detergent and amount of detergent? According to the fabric fibers and detergent washing temperature, fabric structure, the size of capacity, types of dirt to identify washing time. Low water level with temperature of 60 ℃ ~ 90 ℃, and time about 8 to 20.
(4) Bleaching: This is a supplementary step of the main process decontamination. Removing the dirt just like pigment, which can’t be completely removed in the main washing process. In this step, mainly be using bleach (chlorine bleaching powder). Therefore, water temperature should be strictly controlled at 65 ℃ ~ 70 ℃, the pH value of 10.2 to 10.8. And according to the dirt type of fabric structure, the volume should be strictly controlled for good running. Low water level with temperature of 65 ℃ ~ 70 ℃ and time about 8 to 12 minutes.
(5) Cleaning: cleaning is a diffusion process. Remnants in the dirt lotion containing ingredients to the water-proliferation, in the process impose a certain temperature (usually 30 ℃ -50 ℃). High water level leads to rapidly reduce the concentration of lotion so to achieve cleaning purposes. General needs of three times of high level cleaning. For the second time after washing needs medium-speed dehydration. High water level is about 2-3 minutes.
(6)Mixing: normally used in washing detergent is the alkaline. Despite repeated cleaning, also can not guarantee that there is no basic element of existence, which will affect the appearance, to a certain extent, will impact of the feeling. Use of mixed acid and alkali, we can solve these problems, and inadequate or excessive in the process of neutralizer amount to will have adverse impact on the fabric. The delivery of neutralizer should be according to the fabric in the washing machine to dehydration After using pH test reagent drops were washed fabrics, pH value, plus high volume, low while reductions. Standards in use in the fabric when the pH value is between the range of 5.8-6.5. The middle water level with temperature of 45 ℃ -55 ℃ and time about 5 minutes.
(7) Softening: softening is a process after treatment, not belong the decontamination process. Softening makes fabric can feel comfortable and prevent static electricity generated. In the internal fabric can play a role of lubrication so as to prevent the fibers closely entangled with each other and falling? The middle water level with temperature of 45 ℃ -55 ℃ and time about 5 minutes.
(8) Sizing: Sizing mainly for the restaurant's tablecloths, napkins, some uniforms and other products or mixed cotton fabric. After sizing can prevent raising on the surface, and also pulp fabric surface was a layer of serous guitar. The dirt infiltration of the obstacles, to a certain extent, is for the next washing. The middle water level with temperature of 45 ℃ -55 ℃ and time about 5 minutes.
(9) dehydration: use of high-speed rotating drum washing machine when the centrifugal force so that the drum in the fabric to reduce the maximum water content. As to thin fabric, wool fabric, corduroy, knitwear, clothing and decorative items should not be high-speed dehydration, but choose medium-speed dehydration for a short period of time.
Secondly, the Category of hotel linen pollution:
Before washing procedures designed to cope with all kinds of dirt linen are a relatively common understand. Linen used in different environment, so the severity of the pollution level is different.