Test Standards And Methods For Flame Retardant Fabrics

Flame-retardant fabrics can be divided into many types. Does the customer consult the cotton fabric for flame retardant treatment? There are also consultations on whether cotton flame retardant fabrics are durable. There are still many customers who care about whether flame-retardant fabrics are used as flame-retardant garments and are harmful to the body.

In order to prevent the invasion of diseases and harmful bacteria, the sweat gland secretions of the human body are weakly acidic (pH 5.2-5.8). If the pH value of the textile directly in contact with the skin is improperly controlled, it will directly affect the pH value of the human skin, thereby affecting health. The detection of PH value of flame-retardant fabrics has always been one of the eco-textile indicators tested by national regulatory agencies, and it is also an indicator of frequent occurrences of non-conformities. At present, most of the domestic textiles according to GB/T7573-2009 "Determination of PH value of textile water extraction", PH value measured by PH meter. The technical parameters specified in the standard are as follows: (1) The extraction medium distilled water or deionized water, at least meet the requirements of GB/T6682-2008 "analytical laboratory water specifications and test methods" three-stage water, PH value is 5.0-7.5; Potassium chloride solution 0.1ml / L, prepared with distilled water or deionized water.

(2) Extraction shock mode Reciprocating mechanical oscillator at 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 is generally controlled at 10-30 °C.

(4) Oscillation time (120±5) min. If the laboratory can determine that there is no significant difference in the test results after 1 h of shaking, the measurement can be performed by shaking for 1 h. Flame-retardant fabric testing standards and methods Flame-retardant testing is basically carried out according to two sets of test standards in the Americas and Europe. European flame retardant standards are EN ISO 11611:2007, EN ISO 11612:2008, EN ISO 14116:2008/AC. :2009 and EN469:2006. Test methods include surface burning and bottom burning. EN ISO11611 is divided into Class 1 and Class 2 for flame retardant safety grades. The technical grades of these two grades are the same, and the materials must meet the requirements specified in the above surface and bottom combustion. EN ISO 11612 Protective clothing for workers in high temperature environments and EN ISO 14116:2008 Protective clothing - Insulation and fire protection - Materials, components and clothing that limit the spread of flames. The main flame retardant standards in the Americas are NPFA 1971 and NFPA 2112. NPFA 1971 is a full set of test standards for fire protection and similar fire protection. NFPA 2112 is a test method for apparel fabrics in industrial flame retardant protective clothing standards, all using the vertical burning method specified in ASTM D6413-2008. Other tests for flame retardant fabrics use the mandatory requirements of GB18401-2010: PH value, color fastness, and decomposable aromatic amines. The shrinkage rates of different materials are also different, and the range of acceptance is also inconsistent. In general, the shrinkage rate of the woven fabric is not more than 3% in the weft direction, and the knitted fabric is not more than 5%.