Correctly Understanding the Combustion Performance of Extruded Polystyrene Board
Bei Peng Beijing New Building Materials Co., Ltd., is specialized in building environmental protection and energy conservation insulation system research and development, production and sales of integrated enterprise. After years of development, the company formed an annual output of 800,000 cubic meters of environmentally friendly extruded polystyrene board ethylene insulation board, 400,000 cubic meters of environmentally friendly polyurethane insulation board, 100,000 tons supporting dry-mixed mortar, 180,000 tons Yanmian, 1.6 million Square meters grid layout, 120 million sets of fixed pieces of production scale. 2012 in Tianjin with the establishment of large-scale branch.
In 2009, Beijing Beipeng New Building Material Co., Ltd. won the joint investment from the Environmental Protection Department of the Ministry of Environmental Protection and the German Ministry of Environmental Protection to introduce complete sets of equipment supplied by the world's leading manufacturer of plastic and rubber extrusion systems. Using the most advanced twin-screw extrusion and CO2 foaming process, so that our company has the most advanced technology, process, CNC production line, is also the first out of China to do the use of freon foam extruded board manufacturers.
Beipeng specifically to you to talk about the burning performance of extruded polystyrene board
EXPERIMENTAL STUDY ON COMBUSTION PERFORMANCE OF EXTRUSION POLYESTER BOARD
Flammability refers to all physical and chemical changes that occur when a building material is burned or exposed to fire. This property is caused by the ignition and flame propagation properties of the material, heat generation, fuming, charring, weight loss, and generation of toxic products. Features to measure. China's national standard GB8624-97 the combustion properties of building materials will be divided into the following levels.
A level: non-combustible building materials
B1 level: Flammable building materials
B2 level: flammable building materials
B3 level: flammable building materials
Flame retardant B1-level extrusion polystyrene board can also be lit, with the flammable B2-class board What is the difference?
First of all, has been explained above, the extruded plate is a combustible material, so regardless of the combustible B2-class board or flame retardant B1-class board in case of fire sure, this is a normal phenomenon. But Kevin extruded plate has a very good self-extinguishing from the fire characteristics, which is more important (generally not introduced). And flame retardant B1-class board from the fire self-extinguishing better than the combustible B2-class board. Flammable B2 and flammable B1 on the distinction between, according to GB8624-1997 "classification of building materials combustion performance," B1 level flame retardant materials in addition to combustible B2-level standards should also meet the standard requirements of the flue gas temperature and Smoke density requirements, see four specific. Generally simple ignition of the insulation material test, it is difficult to see flammable B2 and flame retardant B1 level between the obvious difference, but at least can see the flame retardant B1 board from the fire than the flammable B2 plate flame length extension , Burning time is short, less smoke.
Comparison of Classification Methods for Combustion Performance of Thermal Insulation Materials
Beijing Beipeng New Building Materials Co., Ltd. production of extruded polystyrene board carbon dioxide foam green insulation performance, adding high-quality flame retardant or fire performance
1) Comparison of the project flammable B2 flame retardant B1 level
2) Detection method GB8626-88 GB / T8625-2005 (using the edge of the ignition) (the use of combustion shaft furnace test)
3) specimen size 90mm wide × 190mm high 190mm wide × 1000mm high
4) the burning time 15s, the flame tip is located in the center of the bottom edge of the specimen, and the specimen into a 45 ° angle 10min, the burner is located in the bottom of the central four specimens
5) Judgment criteria
(1) Within 20 s after ignition, the flame tip of the five specimens did not reach 150 mm above the fire point
(2) the average length of the residual length of the specimen burning ≥ 150mm, of which no one of the combustion residual length of the specimen is zero
Self-extinguishing from the fire is the construction site inspection XPS extruded board flame retardant standard?
B1 (oxygen index ≥ 30), B2 (oxygen index ≥ 26) is the laboratory state according to the national standard requirements of XPS extruded plate test results, with strict test conditions, can not be simply interpreted as a fire away from the fire Self-extinguishing.
So: Many people at the site to ignite the vertical (non-inclined) XPS extruded plate facade (non-angular), to see whether to leave the fire source of their own way out. There can learn from, but not scientific rigor.