Application
The NFPA 701-2 Flammability Tester is designed to determine the ignition resistance properties of draperies and other hanging fabrics according to NFPA 701 Test Method 2. It is suitable for single-layer and multi-layer fabrics, fabrics with a density greater than 700g/m² (21oz/yd²), and fabrics coated with polyethylene or similar materials. This tester is particularly useful for testing materials such as shade cloths, tents, waterproof fabrics, plastic curtains, and other building fabrics.
Testing Method
Test Range
- Test Method 1: Suitable for materials like table skirts, curtains, tablecloths, decorative curtains, and similar fabrics with density less than 700g/m².
- Test Method 2: Suitable for materials with a density greater than 700g/m², including multi-layer fabrics, films, plastic curtains, shade cloths, tents, and other building materials.
NFPA 701 Test Requirements
- Test Method 1:
- After removing the ignition source, the combustion time should not exceed 2 seconds.
- The average mass loss during combustion should not exceed 40%.
- Test Method 2:
- The combustion time of any single sample should not exceed 2 seconds after the ignition source is removed.
- If the material drops to the bottom of the test box during the burn test, the combustion time should still not exceed 2 seconds.
- The scorching length of folded specimens depends on the type of material.
General Requirements for Testing
- Sample Preparation: Cut the sample in the dispersed region of the material along its long edges, following the longitudinal direction. For folded materials, fold the sample four times along the length, ensuring each fold is of equal size. Multi-layer fabrics should be stitched along the four sides and centerline.
- Baking: The test samples should be baked in a furnace for 1 to 3 hours prior to testing.
- Flammability Testing: The test must be performed within 2 minutes of removing the sample from the furnace.
Test Steps
- Sample Fixing: Position the folded sample so that there is a 12 ± 3 mm separation between folds. The bottom center of the sample should be 100 ± 10 mm above the burner. Use a fixed rod to hold the sample in place with a clip.
- Combustion Test: Ignite the burner and adjust the flame to a height of 280 ± 12 mm. Apply the flame to the sample for 2 minutes, then remove the burner.
- Record Results: Measure and record the combustion time once the material falls to the bottom of the test box, with a precision of 0.5 seconds. Also, record the time it takes for the flame to extinguish and the length of the charred area once all flames have been extinguished.
