Mechanical cleaning methods and precautions for ordinary smooth leather products Leather clothing is the most exposed leather product in cleaning. According to different cleaning materials, mechanical cleaning leather clothing can be divided into three categories: tetrachloroethylene dry cleaning, petroleum dry cleaning and machine washing. Among them, the most commonly used method of smooth leather clothing is tetrachloroethylene dry cleaning and petroleum dry cleaning.
① Lay the clean leather coat on the workbench in advance, check the surface and lining of the leather coat, apply the pre-treatment agent (prepared by tetrachloroethylene and special leather detergent according to a certain ratio) with a brush, and apply the paint on those with obvious and severe dirt. The place.
② Start the washing equipment for dry cleaning, dry clean and fatliquor the smooth leather clothes (the dosage is 0.5kg / 10 pieces of leather clothes, and light-colored clothes need to add cleaning agent 0.2 ~ 0.3kg / 10 pieces of leather clothes. Draw into the button collector of the equipment. Draw dry cleaning solution into the liquid tube, let the machine perform a small cycle of about 1min, and then pump the dry cleaning solution into the bottom box. Put the pre-existing leather garment into the washing equipment drum, and set the washing time at 10min, start the washing equipment for small cycle washing for 1 ~ 2min, then large cycle washing for 3 ~ 5min. The washing rotation number is controlled at 5 ~ 32, (dark leather clothes washing time 3 ~ 5min, light leather clothes washing 5 ~ 8min) completed Wash into high dehydration. The optimal number of dehydration entry should be controlled at 240 ~ 280r / min, dehydration time is 1 ~ 2min. This process can be repeated according to the amount of leather clothes washed and thickness. Complete dehydration and drying: the highest drying The temperature is controlled at 40 ℃, and the heating is started to start drying. The drying time depends on the synchronization of the liquid-water separator. After the drying is completed, the deodorization and cooling are also performed. When the temperature drops below 20 ℃, remove the leather clothes and hang them. Evaporate residual solvent in a cool place. < br /> Note:
a. According to the approximate color classification, light-colored leather clothing should be washed separately.
b. Before cleaning the leather clothes, check whether there are any accessories such as buttons, zippers, and decorations that are easily dissolved by tetrachloroethylene on the leather clothes.
c. Before dry cleaning of leather, some leather coats with poor color fastness should be tested in a hidden place in advance. If the coating is dissolved by tetrachloroethylene solution and severe coating separation occurs, this leather should not be dry cleaned.
d. When carrying out the dehydration operation of dry cleaning of leather clothes, another issue that deserves attention is to pay attention to controlling the dehydration instructions of the washing equipment not to rise too fast. After the dry-cleaned leather clothes reach the predetermined washing time, the drainage time of the washing equipment is appropriately extended to evaporate and drain the solvent absorbed in the leather clothes, so that the fatliquoring aid remaining in the leather fibers is evenly distributed on the entire leather clothes ( Time is generally about 5min). There should be only. On washing equipment with only one dehydration scale, intermittent dehydration can be used. That is, after the dehydration equipment is connected to the dehydration, when the drum rises to a certain level, the dehydration motor is turned off in time to prevent When the drum is rotating at a high speed, the huge centrifugal force causes the residual solvent in the leather clothing to rush to the drum shell, and then quickly splashes back to cause secondary pollution, forming a texture stain on the leather clothing.
e. Because the temperature of leather clothes washing and drying is lowered, after the drying and taking out of the drum, some tetrachloroethylene will remain in the leather clothes, which needs to be hung and dried before the next process.
f. Strictly dry cleaning according to the leather clothes, and control the washing temperature and time to prevent damage to the leather.
g, in order to ensure the dry cleaning effect of leather clothes, the loading capacity of leather clothes should not be too large, and about 60% of the rated loading capacity of washing equipment is appropriate.