1 test box: the internal size of the test box is 300mm×300mm×300mm, which is made of hard fireproof insulation board, with heat resistance similar to that of asbestos cement, and the thickness is not less than 6mm. The top of the box is open, and there is a movable bottom plate made of the same material, and the joint is sealed.

Note: other test boxes that can give the same results can be used.

2. Square metal plate: 230mm×230mm, thick (6.5±0.5) mm, with a round hole with a diameter of 205mm in the middle.

3. Dryer: store tablets and dried samples. It is suggested to use color-changing silica gel as desiccant.

4. Oven: there should be ventilation and constant temperature control. The temperature inside the box was (105±2) ℃.

5, gloves: polyethylene, polypropylene and silica gel gloves are available.

6. Steel ruler: the dividing value is mm.

7. What are the components of the carpet combustion tester? Vacuum cleaner: all surfaces in contact with the sample shall be flat and smooth.

8. Laboratory fume hood: the volume is about 2m3, and the exhaust device can be closed during the test. The front or one side of the fume hood shall be provided with glass Windows for viewing specimens.

9. Tablets: hexamethylenetetramine (trade name: ulotropin) flat tablets with a mass of (150±5) mg and a diameter of 6mm.

Note: the tablet is stored in the dryer to reduce cracking when ignited.

10. Timer: stopwatch is optional.

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