There are many types of flame-retardant fabric classification, and some customers will consult the cotton fabric to do the effect of flame retardant treatment is good? Also consult the cotton flame retardant fabric is durable. There are many customers concerned about the use of flame retardant fabrics as a flame retardant clothing, whether it is harmful to the body. Here we explain for everyone under the detection of flame-retardant fabric.
In order to prevent disease and harmful bacterial invasion, the body sweat gland secretions are weak acid (PH value in 5.2-5.8). If the skin in direct contact with the PH value of improper control, will directly affect the human skin PH value, thus affecting health. Flame retardant fabric PH value detection has been the focus of national regulatory agencies, one of the indicators of eco-textile, but also frequently appear unqualified indicators.
At present, most of China in accordance with GB / T7573-2009 "Determination of PH value of textile water extraction", using PH meter to determine the PH value of textile extract. The technical parameters of the standard are:
(1) extraction medium distilled water or deionized water, at least meet the GB / T6682-2008 "analytical laboratory water specifications and test methods" three water requirements, PH value of 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 oscillators with a rotation rate of at least 30 cycles / min.
(3) temperature room temperature, generally controlled at 10-30 ℃.
(4) shock time (120 ± 5) min, if the laboratory can determine the shock 1h test results no significant difference, can be used to determine the shock 1h.
Flame-retardant testing is basically carried out in accordance with two sets of test standards in the Americas and Europe. The European flame retardant standards are EN ISO 11611: 2007, EN ISO 11612: 2008, EN ISO 14116: 2008 / AC: 2009 and EN469: 2006.
The test methods include two methods of surface burning and bottom combustion. EN ISO11611 on the flame retardant safety class is divided into Class 1 and Class2, two levels of technical indicators the same, the material must meet the requirements of the surface and the bottom of the combustion requirements.
EN ISO 11612 Protective clothing in high temperature environment and EN ISO 14116: 2008 Protective clothing - Thermal insulation and fire protection - Materials, components and clothing for restricted flame spread.
Americas flame retardant standards are the most important NPFA 1971 and NFPA 2112.
NPFA 1971 fire packs and similar fire with a full set of clothing testing standards, NFPA 2112 industrial flame retardant protective clothing standards in the clothing fabric test methods are used ASTM D6413-2008 standard vertical combustion method.
Flame-retardant fabric of other testing using GB18401-2010 mandatory requirements: PH value, color fastness, decomposition of aromatic amines. Different materials shrinkage rate is different, the scope of acceptance is also inconsistent. In general, the shrinkage of the fabric is not more than 3%, and no more than 5% of the knitted fabric is acceptable.