GB/T 5455 Vertical burning test of textiles
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GB/T 5455 Textiles-Burning behaviour - Vertical method
GB/T 5455 application scope
GB/T 5455 specifies test methods for determining the flame retardant properties of various flame-retardant textiles to determine the tendency of textiles to continue burning, smoldering and carbonization.
GB/T 5455 is suitable for the determination of flame retardant properties of flame retardant woven fabrics, knitted fabrics, coated products, laminated products, etc.
GB/T 5455 reference standard
GB 6 529 -86 Standard atmosphere for humidity conditioning and testing of textiles
GB/T 5455 test principle
Place a sample of a certain size under the specified burner and ignite it, and measure the afterburning, smoldering time and damage length of the sample after the specified ignition time.
GB/T 5455 sample requirements
1 . The sample should be measured from a position 1/10 of the width from the edge of the fabric. The sample size is 300 mm
2 . For each sample, take five samples each in the warp and weft directions (longitudinal and transverse). The warp (longitudinal) samples cannot be taken from the same warp yarn, and the weft (transverse) samples cannot be taken from the same weft yarn.
3 . The sample should be placed in a secondary standard atmosphere according to GB 6529, with a temperature of 20°C ± 2'C and a relative humidity of 65% ± 3%. Depending on the thickness of the sample, it should be placed for 8-24 hours until equilibrium is reached. Then, take it out and put it in It can also be processed in sealed containers according to the conditions agreed upon by all parties concerned. The arbitration test should be left for 24 hours,
GB/T 5455 test results and analysis
1 . Calculate the average afterburning time, smoldering time and damage length of the five samples in the warp (longitudinal) and weft (transverse) directions.
2 . Record the sample in which the absorbent cotton burned due to dripping during the burning process.
3 ． For some samples, several of them may be burned through. Record the actual measured values of the afterburning time, smoldering time and damage length of each unburned sample, and indicate how many samples there are in the test report. Burn through.
4 . For specimens that are melted and connected together during combustion, the highest point of melting should be used as the criterion when measuring the damage length.
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