PH value detection of flame retardant fabric extract

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Test standard flame retardant fluorescence

Flame-retardant fabrics are mainly divided into two categories: flame-retardant fiber fabrics and flame-retardant finishing fabrics.
The same is true for the classification of flame-retardant fabrics. The category is flame-retardant fabrics with flame-retardant effects on the fiber itself: aramid flame-retardant fabrics and acrylic flame-retardant fabrics, as well as aramid flame-retardant viscose blended fabrics and acrylic blended flame-retardant fabrics; The second type of flame retardant fabrics are more common, including: cotton flame retardant fabrics, cotton nylon flame retardant fabrics, CVC flame retardant fabrics, etc.
In order to prevent the invasion of diseases and harmful bacteria, the secretions of human sweat glands are weakly acidic (PH value between 5.2-5.8). If the pH value of textiles in direct contact with the skin is not properly controlled, it will directly affect the pH value of human skin, thereby affecting health. The pH value testing of flame-retardant fabrics has always been one of the ecological textile indicators that regulatory agencies in various countries focus on testing, and it is also an indicator that frequently fails to meet standards.
At present, most domestically use a pH meter to measure the pH value of textile extracts in accordance with GB/T7573-2009 “Determination of pH value of water extraction of textiles”. The technical parameters stipulated in this standard mainly include:
(1) The extraction medium is distilled water or deionized water, which at least meets the requirements of grade three water in GB/T6682-2008 “Specifications and Test Methods for Water Use in Analytical Laboratories”, and the pH value is between 5.0-7.5; potassium chloride solution 0.1ml/L, prepared with distilled or deionized water.
(2) Extraction oscillation method: reciprocating mechanical oscillator, with a rate of at least 60 times/min; rotary mechanical oscillator, with a rotation rate of at least 30 cycles/min.
(3) Temperature: Room temperature, generally controlled at 10-30°C.
(4) Shaking time (120±5) min. If the laboratory can determine that there is no significant difference in the test results of shaking for 1 hour, it can be measured by shaking for 1 hour.
：Textile

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