【 Weak current College 】 insulation fire safety problems and solutions-Power By 【 China power house network 】

20 years of application experience prove that PU, according to the current application add efficient traditional flame retardant technology to solve PU foam for tackling the fire-retardant, to reach China promulgated a series of PU fire safety standards, it seems to be impossible. After 20 years of technology research, current market has found that the original of the PU foam flammability reaches the oxygen index is high, the flame propagation of small, small, toxic smoke, fire and flames through strong hard ranhua technical line. The core technology is the use of chemical structure modification techniques, selection of international advanced non-halogenated, knot carbon expansive line of fire-retardant technology.
　　
This technology's main innovation point: in PU inflammable carbamate molecular structures, the introduction of nonflammable, temperature resistance, low smoke, low toxicity of cyclic compounds (ethylene urea acid loop, Matt triazole flavanone and aromatic rings, carbonation-diamine key), or introduce a nonflammable structural polymer nanoparticles. This greatly improves the foam flame resistance, temperature resistance, while greatly reducing foam release smoke toxicity problems. Without chemical structure modification of PU foam, its oxygen index in 17 ~ 18, its flash point and spontaneous points respectively 310 degrees centigrade and 415 ° c, in extremely flammable in air. At 200 ° c to 250 ° c begins to escape the release of toxic gases and volatile, and begin the thermal decomposition, release large amounts of toxic gases and dust. Using the above difficult chemical structures route ranhua technology of the PU foam, modified by temperature even reach 400 ℃, almost no volatiles to escape. At high temperatures, bubble in the combustion process, first in PU foam surface generated with Coke leather structure of foam barrier layer, this barrier layer has played a significant lessening bubble combustion smoke and toxic gas.
　　
Foam fire-retardant layer of several key features: first, with insulation function, can prevent the provision of further combustion heat transfer; second, a trap function, on the one hand prevent PU foam to prevent oxygen supply, on the other hand, PU foam continue burning; third, adsorption PU burning hot melt falling objects, prevent second burst into flames. This foam fire-retardant layer up to the threefold role, fire protection, fire-retardant features, played in the fires of real fire prevention features.
　　
In this study of 20 years, PU foam, using the above techniques to ranhua, conquer the PU foam resistant to combustion and heat in a series of technical difficulties, the specification can be reached at present PU internationally to achieve following a series of nonflammable, and temperature of high index:
　　
1. make PU temperature resistance from 120 ° c to 150 ° c, and even reached 170 ℃;
　　
2. make PU oxygen index consists of 17 ~ 18 to 30 or above, or even up to 35;
　　
3. make the PU foam original smoke much of greatly reduced, the smoke density level respectively SDR ≤ 75, SDR ≤ 50, SDR ≤ 30;
　　
4. make PU foam from the original non-flame penetration capabilities to meet resistance to half an hour or even up to one hour.
　　
With the above characteristics of PU foam, is currently widely used in national economic sectors, and in more than 20 years, the main results achieved the following:
　　
1. the development of fire-retardant, temperature-resistant PU foam, successfully used in aviation, trains, buildings, oil field and other fields, the detection of foam performance achieved construction, aviation, trains PU flame retardant grade standards;
　　
2. in the PU heat technology, for the first conquer PU foams and temperature of 170 ° c technical difficulties. During the Asian Games, Asian Games Village Conference Center successfully applied in the heat of buried pipelines insulation work;
　　
3. for eight consecutive years (1992-1999) to Guangdong Maoming oilfield supply 150 ℃, oxygen index up to 30 of efficient PU foam material;
　　
4.1999 years to conquer the first PU nonflammable B1 grade technology. 5 years, there have been four consecutive central air-conditioning PU plate production line on the successful application of PU nonflammable B1 grade technology.
　　
　　
20 years, I have accumulated PU fire research and practical experience, is China building energy-saving insulation, is an urgent need to tackle problems with new fire-resistant PU foam is able to get out. With the development of the chemical structure of my modification techniques, halogen-free, knot carbon intumescent difficult route PU foam ranhua technology is the ability to develop.
　　
I developed the new PU foam materials, fire, a fire resistance of concrete as follows: 1. prevent fire spreading, drugs to prevent the release of dual function; 2. resistance to flame penetration ability, good fire resistance; 3. the material strength and volume in the fire, not lost too much, surface no burst, no collapse, strong resistance to fire functionality; 4. with thermal insulation, fire safety double effect. This four characteristics and Chinese PU fire safety standards, which is closely connected with Chinese characteristics of fire safety of new products.
　　
As soon as possible, establish a Chinese-style building energy-saving insulation system of fire safety standards, regulating Division of fire safety fire resistance ratings and application range accordingly.
　　
China building energy conservation agenda has been mentioned, and is urgently needed. Our current energy market depends on the application of mass touch with high-efficiency energy-saving foam (EPS, XPS, PU) of the status quo, I especially carefully, as soon as possible to establish a new fire-resistant PU foam in the Chinese-style building energy-saving insulation system.
　　
China's current energy market confusion, lack of architectural design technical specification. For example:
　　
1. China's existing senior civil building design fire protection standard (GB50045-1995), not for exterior insulation fire design specifications for different fire protection grade of exterior insulation system is the lack of classification standards and use scope restrictions;
　　
2. China's existing exterior insulation system of the State or industry product standards and related specifications, requirements for the incendiary indicators, do not attach importance to.
　　
There is an urgent need to speed up the Chinese authorities must do the following:
　　
1. the reference for aboard exterior insulation system product standards, set up our own insulation system product standards, according to the non-combustibility test for building materials (GB5464), "building materials nonflammable test method" (GB8625), the fire resistance test method of building elements (GB9978) and the latest issue of "building materials combustion performance classification" (GB8624-2006), on domestic current external wall insulation system for a thermal insulation and the entire system (premium, thermal insulation materials containing) combustion performance and fire resistance test for fire resistance of indicators, as there are indicators and classification;
　　
2. the reference for aboard exterior insulation system technical specifications, and set up our own insulation system technical specifications and the provisions based on the fire resistance rating; different application scope
　　
3. to promote and accelerate non-combustibility material, fireproof grade high efficient and energy saving materials, fire resistance rating of inorganic and organic composite high efficiency energy-saving materials, and our research with innovative anti-fire feature PU insulation materials, and other external thermal insulation composite systems development and application.
　　
China promulgated the PU foam for building fire safety system standards are always higher than the standard of overseas similar system, to the development of China's polyurethane industry and the development of energy efficiency in buildings presents a double meaning. External, imperceptibly to China PU products directly into the international market has opened up a green channel; internally, China PU products certain indicators than similar foreign products, imperceptibly into technical barriers. Thus it can be said that China's stringent fire safety standards, to PU China polyurethane industry development and promote energy efficiency in buildings, forming with Chinese characteristics have independent intellectual property rights of the PU product system, a development opportunity. Hope the visionary entrepreneurs with hands together to create unique Chinese fire prevention features new PU insulation foam and the establishment of Chinese building energy-saving insulation system for China's energy efficiency in buildings and make new contributions to the cause.