The fire performance testing of tarpaulins is an important step in ensuring their safety and reliability during use. Through strict testing standards and methods, the performance of tarpaulins in fire situations can be evaluated, providing consumers with safety assurance. The following is the testing method for the fire resistance performance of tarpaulins:

OIP-C

1. Test conditions

Environmental requirements:The sample should be placed in an environmental condition of 23 ℃± 2 ℃ and relative humidity of 50% ± 5% for at least 24 hours, and the test should be conducted in this environment.

Sampling requirements:Randomly select one piece from each batch of flame retardant tarpaulin produced, and use the actual width of the tarpaulin as the sampling width. Cut 4m along the length direction as the sample, 2m for testing, and 2m as the backup sample.

2. Appearance and Dimensional Inspection

Appearance inspection:Randomly select several flame-retardant tarpaulins and visually inspect them under lighting or sunlight.

Size measurement:Measure the length and width three times at equal intervals using a steel ruler with a division value of 1mm, and take the arithmetic mean of the results while keeping integers.

3. Fracture strength test

Experimental instruments:The testing instrument is a universal testing machine.

Test method:The test shall be conducted according to the method specified in GB/T 3923.1.

Experimental results:Take 5 samples each in the warp and weft directions for testing, and express the arithmetic mean of the fracture strength of 5 samples each in the warp and weft directions, with the calculation result accurate to 1N.

4. Combustion performance

Oxygen index test: The oxygen index value of the sample should not be less than 28.0%.

Vertical combustion performance test: The sustained combustion time, smoldering time, damage length, and combustion droplets of the sample should meet specific requirements.

5. Waterproof performance

Experimental instruments:The experimental instrument is a permeability meter.

Test method:The experiment shall be conducted according to the test method specified in HG/T 2582.

Experimental results:Under the predetermined pressure, observe the visible surface of the sample within 3 minutes, and there should be no water infiltration points or water marks on any of the 5 samples.

6. Low temperature resistance

Experimental instruments:The experimental instrument is a low-temperature chamber with a temperature deviation of ± 1 ℃.

Test method:Randomly cut samples at a distance of not less than 100mm from the edge of the fabric, with dimensions of 60mm in length and 15mm in width, and 5 samples in the warp and weft directions. Fold the sample in half into a ring shape, clamp it on the sample holder, and then place it in a low-temperature chamber at -25 ℃± 1 ℃ for 3 minutes ± 20 seconds. Conduct impact testing according to the test method FZ/T01007.

Experimental results:If one of the 10 samples breaks or cracks, it is considered unqualified, and only if all the samples have no cracks can they be judged as qualified.

7. Climate resistance

Experimental instruments:The experimental instrument is a weather resistant test chamber.

Test method:Cut a suitable sample at a position not less than 100mm along the edge of the fabric and place it in a weather resistant test chamber. Follow the test conditions of GB/T16422.2 using a sunlight filter exposure (Method A), set the parameters according to Table 3, and perform aging. Then, measure the performance after aging according to the provisions of fracture strength, oxygen index, and water permeability resistance.

Experimental results:The fracture strength, oxygen index, and water permeability of the aged sample should meet specific requirements.

8. Toxicity of smoke production

Experimental instruments:The experimental instrument is a material smoke toxicity testing device.

Test method:Randomly cut a section of flame-retardant tarpaulin with a length of not less than 400mm along the edge of the fabric, and conduct smoke toxicity tests according to the test method specified in GB/T20285.

Experimental results:The smoke toxicity level of flame-retardant tarpaulin should not be lower than the requirement of ZA2 level in GB/T20285.

In summary, through these detailed testing methods and steps, the fire resistance performance of tarpaulins can be comprehensively evaluated, ensuring their safety and reliability in various application scenarios. For production enterprises, strictly following these testing standards for production and quality control is the key to ensuring product compliance and qualification.