跳至主要内容

The Test Method Of Vertical Flammability

1 Scope:Textiles Combustion Performance Test Vertical Method This standard specifies the test method for the determination of the flame retardancy of various flame-retardant textiles for the purpose of determining the tendency of textiles to continue burning, smoldering and carbonizing.This standard applies to the determination of flame retardant fabrics, knitted fabrics, coated products, laminated products such as flame retardant properties. 
2, reference standard:The following standards contain provisions which, by reference in this standard, constitute provisions of this standard. At the time of publication of this standard, the versions shown are valid. All standards will be revised and the parties using this standard should explore the possibility of using the latest version of the following standards.GB 6529-86 Standard atmosphere for humidity control and testing of textiles 
3, textiles combustion performance test vertical method definitionThis standard adopts the following definitions. 
3.1 continued afterflameUnder the specified test conditions, the material is continuously burned after the (point) fire source is removed. 
3.2 continued burning time afterflametimeUnder the specified test conditions, the material remains flame burning time after removing (point) the fire source.3.3 Flame retardant afterglowWhen the flame burns after the termination, or as a flameless burner removed (point) after the fire, the material continued flameless burning.3.4 flame retardant time afterglowtimeUnder the specified test conditions, the time for the flame to burn continuously after the flame has been terminated or after the ignition has been removed.3.5 damage length damagedlengthThe maximum distance of the area of ​​material damage in the specified direction under specified test conditions. 
4, the principleA certain size of the sample placed in the specified burner lit, measured after the specified ignition time, the sample continued burning, smoldering time and damage length. 
5, the health and safety of the test staffThe burning of the textile material produces smoke and gas, which is toxic and affects the health of the staff. The test equipment can be installed in the fume hood, after each test should be excluded from smoke and smoke, but in the sample combustion process to close the ventilation system, so as not to affect the test results. 
6, equipment and materials6.1 vertical burning tester:6.1.1 Combustion test chamber: It is made of heat-resistant and smoke-resistant material in front of the glass door with a rectangular rectangular burning box, the box size of 329mm × 329mm × 767mm. The top of the box has a uniform arrangement of 16 holes with an inner diameter of 12.5mm. In order to prevent the impact of air outside the box, 30mm from the top of the box outside the installation of a roof, the lower part of the box on both sides of the opening of the six diameter of 12.5mm ventilation holes. The top of the box can hold the specimen holder, so that the sample holder is perpendicular to the front door and is located in the center of the test chamber. The bottom of the specimen holder is located above the highest point of the igniter nozzle. The bottom of the box with heat and corrosion-resistant materials made of the board, the length of the bottom of the box than the small 25mm, thickness of about 3mm. The other in the middle of the box to put a drop or other debris can withstand the plate or screen, the minimum size of 152mm × l52mm × l.5mm.6.1.2 Sample holder: Used to hold the specimen to prevent curling and keep the specimen in a vertical position. The sample clip consists of two pieces of thickness 2.0mm, length 422mm, width 89mm, U-shaped stainless steel plate, the inner frame size is 356mm × 51mm. The specimen is fixed in the middle of the second plate and clamped on both sides with a clip.6.1.3 Igniter: Use the ignition shown in Figure 2. The igniter nozzle has an inner diameter of 11 mm and a pipe head with a vertical angle of 25 °.6.1.4 The igniter inlet gas pressure is 17.2kPa ± 1.7kPa.6.1.5 control part: a power switch, EDM ignition switch, ignition start switch, sample ignition time set, continued burning time meter, smoldering time meter, gas supply indicator, gas control valve The6.2 Propane or butane gas for the gas industry.6.3 Hammer Each hammer is attached with a hook and the hammer can be hung on the lower end of the test specimen side to determine the length of the damage.6.4 medical absorbent cotton6.5 stainless steel ruler accuracy 1 mm.6.6 sealed containers. 
7 sample and humidity control7.1 The specimen shall be taken from the part of the width of 1/10 width. The sample size is 300mm x 80mm and the long side is parallel to the fabric (longitudinal) or weft (transverse).7.2 Each specimen, warp and weft (longitudinal and transverse) each take five samples, the longitudinal (longitudinal) specimen can not be taken from the same warp, weft (transverse) specimen can not be taken from the same weft.7.3 The specimen shall be in accordance with GB6529, in the secondary standard atmosphere, that is, the temperature of 20 ℃ ± 2 ℃, relative humidity of 65% ± 3%, depending on the sample placed in the thickness of 8 ~ 24h until the balance, and then removed into the sealed container May also be dealt with in accordance with the terms agreed upon by the parties concerned. Arbitration test should be placed for 24 hours. 
8 Test procedure:8.1 Test temperature and humidity: test in the temperature of 10 ~ 30 ℃ and relative humidity of 30% to 80% of the atmosphere.8.2 Power on and air supply.8.3 Turn off the front door of the test chamber, press the power switch, the indicator light indicates that the power is on, the condition switch will be placed in the flame height measurement position, open the gas supply valve, press the ignition switch, ignite the ignition device, use the valve adjustment device Adjust the flame to a high degree of stability to 40mm ± 2mm, and then put the condition switch on the test position.8.4 Check whether the flame retardant, flame retardant timer is on the zero.8.5 Ignition time is set to 12s.8.6 Place the specimen in the sample holder. The lower edge of the specimen should be flush with the lower end of the specimen holder. Open the test chamber door and hang the sample holder together with the specimen in the test chamber.8.7 Close the door, then the power indicator light should be bright, according to the ignition switch, lit the ignition device, to be 30s flame stability, press the start switch, so that the ignition is moved to the sample below, lit the sample. At this point from the sample from the sealed container to take out the time must be within lmin.8.812s, the ignition back to the original, continued to start the chronograph timer, to be continued to stop, immediately press the timer to stop the switch, the flame retardant timer began to wait until the flame stop, press the timer to stop the switch. Read the burning time and flame retardant time, the reading should be accurate to 0.1 s.8.9 When testing the fabric made of fusible fiber, if the test sample is produced in the process of burning droplets, should be in the bottom of the box at the bottom of 10mm thick cotton. Note whether the melt off is caused by the burning or flame retardant of the absorbent cotton and recorded.8.10 Open the front door of the test chamber, remove the sample holder, remove the sample, first along the length of the carbonization of the direction of the fold, and then on the side of the specimen side, from its bottom and side about 6mm, The weight of the unit area of ​​the weight of the selection of heavy hammer, and then slowly lift the sample at the bottom of the other side, so that the hammer floating, and then down, measuring the length of the tear tear, that is, the length of damage, the results accurate to 1mm The8.11 Remove the debris from the chamber and vent the ventilation equipment, remove the smoke and gas from the test chamber, and then test the next sample. 
9 Test results and analysis9.1 Calculate the mean value of the duration of ignition, the duration of the smoldering and the length of the damage in the five specimens of the longitudinal (longitudinal) and zonal (transverse) directions, respectively.9.2 Record the samples of the slag produced during the combustion process.9.3 For some samples, several of these samples may be burned and the measured values ​​of the duration of the burn-in, flame-retardant and the length of the burns shall be recorded and indicated in the test report Block sample burned.9.4 For samples that are melted and joined together during combustion, the length of the damage shall be measured at the highest point of melting. 
10 test reportThe test report should include the following:A) that the test is carried out according to this standard;B) the type of the sample, the name, the organization specifications;C) the humidity control time and atmospheric conditions of the sample;D) the atmospheric conditions at the time of the test;E) gas source type;F) report the measured value of the burning time, flame retardant time and damage length of each specimen by longitudinal, longitudinal and transverse directions and their mean values;G) report the characteristics of combustion, such as carbonization, melting, shrinkage, curling, burning pass;H) report whether there is any dripping when burning, and whether it will cause the burning of cotton or flame retardant;I) Test date and test personnel.

评论

此博客中的热门博文

Multi-Functional Scratch tester For automotive interior materials

          Multi-Functional Scratch tester is applicable to all types of wiping performance test of automotive interior materials; test equipment integrated three domestic standards (fingers scraping method, a hundred grid method, and plastic scraping finger scraping method).         Scratch tester is an electronic instrument capable of measuring critical load, adhesion, scratch resistance and bond strength for a wide range of surfaces. Scratch tester measures the scratch resistance of a sliding and moving surface in the relative motion to a stylus. The stylus is forced/pressed against the moving surface with precise controlled force which is normal to the surface and tangential force at the contact has to be measured.         Scratch tester can be utilized for all type of industrial coating from the plasma layers used in semiconductor and optical technology used in decorative coatings used for automotive and consum...

Reveal the standards for textile breathability testing and let you understand it in seconds!

 Reveal the standards for textile breathability testing and let you understand it in seconds! Breathability testing is a measure of how much gas can pass through a textile. However, there is no single "optimal" air permeability value, as it depends on the specific circumstances in which the textile is used. For example, if it is used to make sportswear, it is hoped that it has good breathability; if it is used to make insulating clothes or warm clothes, it is hoped that it can block the cold well. Therefore, when testing the air permeability of textiles, the purpose of using the textile must be clearly understood in order to obtain reasonable values. In order to accurately and quickly test the true breathability performance of a sample, specially designed and developed instruments must be used. Testing methods generally include: fabric thickness (Thickness), fabric density (Density), fabric water absorption rate (Water Absorption Rate), evaporation and mass transfer (Moistur...

Test Methods of Universal Pilling Assessment Viewer (PAV)

Universal Pilling Assessment Viewer enables fabric to be assessed while still mounted on a Martindale head. The Pilling Assessment Viewer (PAV) for the textile market has been developed with the help of a major textile company in accordance to BN EN ISO 12945 standards incorporating all 3 parts and adopting the following test methods: Part 1: ICI Pilling box method (BS 5811) Part 2: Modified Martindale method (SN 198 525) Part 3: Atlas random tumble method (ASTM D 3512-96) It uses D65 Artificial Daylight (with CWF optionally available), as specified by many retailers. Other test methods can also be viewed, including those specified by major retailers. Other results of test methods that can be viewed include: BS 5811:1986 Determination of resistance to pilling and change of appearance of fabrics. ICI modified pill box for snagging Fleece appearance and surface change after washing Other test methods as specified by several major retail outlet. To optimize c...