A powerful way to remove silicone oil spots: The intuitive manifestation of silicone spots on the surface of clothing is the appearance of oil spots as small as a needle tip to the size of a rice grain. Under extreme conditions, the area may be larger. Sometimes the oil spots will have a certain color due to floating color. , the spots are like small wet spots, soft and non-grainy to the touch, and are extremely difficult to find and remove before drying. The reason is caused by the demulsification and bleaching of silicone oil, which often occurs after easy-iron finishing and washing and softening processes.
When preparing the no-iron reagent, in order to reduce the impact of resin finishing, silicone oil is often added to improve brightness, smoothness and tearing strength. Most of them are amino silicone oil, large breast type hydroxyl silicone oil or compound silicone oil softener. Now they are also starting to There are applications of multi-component copolymerized silicone oil. In addition to selecting the appropriate silicone oil when applying, be sure to follow the correct ingredient dilution process. Use it after 1-2 hours after preparation. Check the surface of the potion for floating objects and delamination before use. Also during the process of soaking clothing To check whether there is any change in the status of the medicine, it is recommended to use a medicine soaking machine or a medicine sprayer. In addition to the structure, cationicity and emulsification level of silicone oil, the phenomenon of demulsification of floating oil is mainly caused by the anionicity of resin, strong electrolyte of catalyst, water hardness and clothing fabrics such as PH value and other factors that interfere with the residual liquid. Due to high temperature setting reasons, it is not necessary to After the ironing process is completed, there is currently no good way to eradicate the problem of silicon spots. It mainly depends on preliminary inspection and strict implementation of the process.
When water washing is too soft, due to the previous process environment, the fermentation washing process generally has fewer problems than the general washing process. General washing often uses alkali agents during desizing. Direct softening after insufficient removal of the alkali agent is prone to problems. Other processes If there are processes such as coloring, bleaching, frying, and frying before softening, strong electrolyte powder, coarse salt may be used to promote dyeing, soda ash, caustic soda, and phosphate may be used to fix the color, or strong oxidants such as high manganese may be used. With phosphoric acid, hydrogen peroxide, bleaching water, or due to pumice, fiber debris, etc., it is possible to cause silicon plaque. In this regard, the principle we adhere to is: before softening, the garments should be fully rinsed with water. If necessary, rinse with clean water before and after softening and add an appropriate amount of acetic acid or penetrant (factory oil can also be used) to adjust. In terms of operation: Do not turn on steam to heat up the water machine after adding silicone oil; the softening temperature must not exceed 60°C (for conventional silicone oil); do not add anionic additives such as anionic penetrants, chelating dispersants, etc.; try to avoid the subsequent addition of strong Electrolyte raw materials such as salt, soda ash, caustic soda, etc.; when adding silicone oil, the machine must be turned on; do not stop the machine after adding soft and draining the liquid.
Here is an intuitive way to judge whether the emulsification of amino silicone oil is sufficient: dilute the silicone oil 5 to 10 times, let it stand for 30 minutes and observe the surface of the diluent. If there is oil drift or stringing, be careful when using this silicone oil.
For the removal of silicon plaque, the current effective low-cost method is to spray the silicon plaque clothing part with gasoline, and then put the clothing in a sealed plastic bag or a closed bucket. There should be enough gasoline at the bottom of the bag or bucket. After letting it sit for 20-60 minutes, take the garment out of the machine and wash it thoroughly with detergent. The effect of silicon spot removal is ideal, but there is a residual gasoline smell. You can use emulsified detergent to fully wash it to remove it, or you can cover up the fragrance smell. In addition, if the fabric contains polyester fiber and has not been ironed, you can fully soak it in isopropyl alcohol and clean it after 20-24 hours. This method will cause minimal damage to the polyester. Pure cotton fabrics that have not been ironed can also be soaked in isopropyl alcohol. Due to time issues, other solvent removal test effects have not been evaluated, leaving it to be put into practice.
Author: Zhao Wenbin, Meng Xianquan, Tian Shuanhu
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