Testing standards and methods for flame retardant fabrics

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Flame retardant fabric flame retardant clothing cotton flame retardant fabric cotton fabric worker protective clothing

Flame-retardant fabrics can be divided into many types. Some customers will ask whether the effect of flame-retardant treatment on cotton fabrics is good? There are also inquiries about whether cotton flame-retardant fabrics are durable. There are also many customers who are concerned about whether flame-retardant fabrics are harmful to the body if used as flame-retardant clothing.
In order to prevent the invasion of diseases and harmful bacteria, the human body’s sweat gland secretions 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 a frequently failed indicator. At present, most domestic manufacturers use a pH meter to measure the pH value of textile extracts in accordance with GB/T7573-2009 “Determination of pH value of textile water extraction”. The technical parameters stipulated in this standard mainly include: (1) Extraction medium 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”, with a pH value of 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. Testing standards and methods for flame-retardant fabrics. Flame-retardant testing is basically carried out in accordance with two sets of testing standards in America and Europe. The European flame-retardant standards include EN ISO 11611:2007, EN ISO 11612:2008, and EN ISO 14116:2008/AC. :2009 and EN469:2006. The test methods include surface burning and bottom burning testing methods. EN ISO11611 divides flame retardant safety levels into Class 1 and Class 2. The technical indicators of these two levels are the same, and the materials must meet the above requirements for surface and bottom combustion. EN ISO 11612 Protective clothing for workers operating in high temperature environments and EN ISO 14116: 2008 Protective clothing – Thermal insulation and fire protection – Materials, components and clothing that limit the spread of flames. The most important flame retardant standards in the Americas are NPFA 1971 and NFPA 2112. NPFA 1971 is a complete set of clothing testing standards for fire-fighting and similar fire-fighting, and NFPA 2112 is a clothing fabric testing method in the standard for industrial flame-retardant protective clothing. They both adopt the vertical burning method specified in the ASTM D6413-2008 standard. Other tests for flame-retardant fabrics adopt the mandatory requirements of GB18401-2010: PH value, color fastness, and decomposable aromatic amines. Different materials have different shrinkage rates, and the acceptance range is also inconsistent. Generally speaking, it is acceptable if the shrinkage of woven fabrics does not exceed 3% in the warp and weft directions, and that of knitted fabrics does not exceed 5%.
：Textile

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