What does ESD anti-static fabric alkali resistance mean?
When working, we often come into contact with anti-acid and alkali work clothes. Anti-acid and alkali fabrics are mainly used to prevent acid, alkali and other chemical agents from harming the human body, prolong the time for acid to penetrate from the surface of the clothing to the skin, and make the acid on the surface of the clothing Non-adhesive, the clothing has little change in strength after acid attack and can withstand strong acid pressure.
The pH value of the fabric refers to the pH value P in the fabric, which refers to the residual acid-base content in the clothing fabric. The relevant national standards have made clear and strict requirements on the pH value of textile products. Whether the clothing fabric is in direct contact with the skin, its pH The values are also different. The pH value of infants and young children and textile products that are in direct contact with the skin should be controlled at 4.0-7.5, and the pH value of textile products that are not in direct contact with the skin should be controlled at 4.0-9.0. pH value, usually called acid-base value, is a numerical value used to express the acidity, neutrality or alkalinity of a solution, ranging from 0 to 14. The pH value of an acidic solution is less than 7. The stronger the acidity of the solution, the smaller the pH value. The pH value of an alkaline solution is greater than 7. The stronger the alkalinity of the solution, the greater the pH value. Pure water or neutral solutions have a pH value of 7.
In the textile production process, whether it is pulping, scouring, bleaching, dyeing (printing), it must go through color fixation, reduction, and cleaning. These processes require the use of a large amount of soda ash, caustic soda, pH regulators, surfactants, etc. If the washing is not thorough, there will be acid and alkali residues on the fabric. The pH value of textiles is determined by testing the pH value of the textile water extract. It is a technical indicator for controlling pH during the production process. The pH value of human skin generally ranges from 5.5 to 7.0, which is weakly acidic. If the pH value of textiles exceeds the standard, it will destroy the weakly acidic environment on the surface of the human skin, cause itching, and make the skin vulnerable to other germs, and even cause Dermatitis and other symptoms. pH value is one of the limit indicators for harmful substances that affect human safety and health remaining in textiles.