02 Apr 2018
What is the standard value of textile fabric PH value ?PH value refers to the residual acid and alkali content in apparel fabrics. The relevant national standards have made clear and strict requirements on the PH value of textile products.Chiffon fabric The pH value of the apparel fabrics is not the same as whether they are in direct contact with the skin.
The pH value of textile products for infants and young children and direct contact with the skin should be controlled at 4.0 to 7.5, and the pH value of textile products not directly contacting the skin should be controlled at 4.0 to 9.0.
The pH, commonly called pH, is a value used to indicate the acidity, neutrality, or basicity of the solution and is in the range of 0-14. The pH of the acidic solution is less than 7, the stronger the acidity of the solution, the lower the pH value; the pH of the alkaline solution is greater than 7, the stronger the alkalinity of the solution, the greater the pH value. Pure water or neutral solution, their pH equal to 7.
In the production process of textiles, whether it is faded pulp, scouring, bleaching, dyeing or printing, it must be fixed, reduced and cleaned. These processes require the use of large amounts of soda ash, caustic soda, pH regulators, surfactants, etc. If the water is not thoroughly washed, there will be acid and alkali residues on the fabric. The pH of the textile is determined by testing the pH of the aqueous extract of textiles and is a technical indicator for the control of pH during production.
The skin of the human body generally has a pH ranging from 5.5 to 7.0, which is weakly acidic. The pH value of the textile exceeds the standard, which will damage the weak acidic environment on the human skin, cause itching, and make the skin vulnerable to other pathogens and even cause it to invade. Dermatitis and other symptoms. The pH value is one of the limited quantities of hazardous substances that remain in textiles and affect human health and health.