China Plastics Online News: Industry has accelerated the development of new polyurethane materials to a critical moment
Polyurethane is the best energy-saving insulation material today, but it is also a flammable polymer material. It is a major issue for science and technology workers in the world, and it is also the key to large-scale promotion and application. There are many products in the market that claim that the flame retardant B1 grade composite polyurethane material has not really met the national mandatory standards. The Beijing Municipal Construction Committee will retreat the unqualified polyurethane materials and sound the alarm to the polyurethane industry. Earlier this year, when the central leadership visited Shanghai, it pointed out that in today's world, technological innovation has become a key support for improving overall national strength. Whoever holds the nose of technological innovation, whoever takes the lead in technological innovation, who can take the lead Machine, win the advantage. Strive to make great innovations in the field of basic science and technology, and make great breakthroughs in key core technology areas.
In order to promote the application of polyurethane insulation materials, Yang Zongyi's polyurethane high-tech new material research and development expert team is willing to work with industry colleagues, and is willing to do technical services and consulting work for the development of new polyurethane materials.
Polyurethane insulation material core material burning performance is not up to standard can not enter the market
In August 2013, the Beijing Municipal Construction and Construction Committee conducted a special sampling inspection of the insulation materials of the old residential buildings. Among them, 27 groups of materials were sampled, and all 5 groups were unqualified polyurethanes, causing great shock to the industry. details as following:
In that year, Beijing completed the renovation of an old residential area of ​​10 million square meters, of which the proportion of rigid foam polyurethane composite panels accounted for 76%. Since July 1 this year, the Beijing exterior wall thermal insulation polyurethane industry has officially and strictly implemented the latest technical regulations - "Technical Specifications for Construction of Light-Dull Polyurethane Composite Panels for Lightweight Mortar Exterior Wall External Insulation Engineering" (DB11/T 1080- 2014) (hereinafter referred to as "Technical Regulations"), the technical requirements for the insulation performance of the insulation core are upgraded, and the combustion performance of the polyurethane composite plate core needs to reach the B1 level, which is a level higher than the previous B2 requirements. However, polyurethane insulation materials entering the market generally only reach the flammable B2 grade and the flammable grade B3 grade. In order to enter the market, many companies will not hesitate to falsify and apply inorganic sand paddles on both sides of flammable polyurethane. Although this composite material can also obtain the B1 test report, it does not change the fundamental problem of flammable or combustible core. The core burning performance that meets the requirements of the new national standard and the national building design fire code meets the flame retardant B1 standard and does not comply with the Beijing Technical Regulations. On the other hand, the company is more worried about the vicious price competition. The B1 grade polyurethane in Beijing Haidian District has been reduced to 1400 yuan per cubic meter, but the price of 1100 yuan to 1200 yuan/m3 in the market has been reduced by the method of cutting corners. Vicious competition can make law-abiding companies unable to survive.
China's polyurethane insulation material core material is difficult to meet the new national standard flame retardant B1 level
The above contradictions exposed two bottlenecks in the polyurethane industry. First, the lack of scientific and technological innovation; second, the determination to eliminate backward production capacity is not large enough to deal with a vicious price war.
The "Technical Regulations" issued by the Beijing Municipal Construction and Construction Committee is legally compliant. On December 30, 2011, the State Council's No. 46 Document "Opinions of the State Council on Strengthening and Improving Fire Fighting Work" clarified that "the external thermal insulation materials for new construction, reconstruction and expansion projects shall not use flammable materials, and flammable materials must be strictly restricted." The revised national standard GB8624-2012 "Combustion Performance Classification of Building Materials and Products", "New Fire Protection Code for Architectural Design" and the new "Green Building Evaluation Standard" have been announced, and all of them attach great importance to the energy-saving and fire safety of insulation materials. . Take the flame retardant B1 standard in the new national standard GB8624-2012 "Classification of Combustion Performance of Building Materials and Products" as an example, Chapter 4 "Combustion Performance Grade", Chapter 5 "Combustion Performance Grade Criterion", Chapter 6.1 "Combustion The performance level mark is an enforcement standard, emphasizing that the combustion performance and grade mark of “wall insulation foam†should strictly implement the “combustion performance grade and classification criteriaâ€, and also satisfy the B1 oxygen index value OI ≥ 30%. . The "wall insulation material foam" emphasized in the inside refers to the core material of the insulation material, that is, the core board referred to in the "Technical Regulations" must reach the flame retardant B1 level.
Nowadays, all organic insulation materials, whether polyurethane (PU) or polystyrene board (EPS, XPS), must be strictly in accordance with the B1 grade combustion performance and grade marking of the “wall insulation foam†marked by the new national standard. Execution, that is, the core board must reach the new national standard. The core material of the polystyrene board system has reached the new national standard, and the polyurethane material which is superior to the polystyrene board is outdated, and it can only be smashed in the B2 grade flammable and combustible materials.
The “composite of organic materials and inorganic materialsâ€, which was abolished by the Ministry of Public Security, was revived.
China's building materials and products burning performance classification standards, from 1997 to 2012, there are three versions before and after, the material fire performance requirements are stricter than once. For example, in the GB8624-1997 version, "organic materials and inorganic materials composite materials" are listed as qualified materials. However, after entering the 21st century, many building fires occurred in China. It has been verified that this composite material is a material with serious fire hazards, although it can also obtain the test report of the GB8624-1997 version of the flame retardant B1 class or even the non-combustible A2 class. The Fire Department of the Ministry of Public Security still decided to phase out the composite material, clarifying that “the report previously obtained according to the 1997 version will be recovered by the report issuing unit in the form of an announcementâ€. After that, the fire department of the Ministry of Public Security executed the core material of the thermal insulation material ( That is, the core board must meet the test report of the flame retardant B1 level. The "Technical Regulations" of the Beijing Construction Committee is resolutely implemented by the Ministry of Public Security Fire Department.
At present, China is vigorously promoting green buildings. Wall insulation is the focus of building energy conservation. Green buildings should be developed in the direction of industrialization and residential industrialization. Multi-functional composite insulation materials with energy-saving, environmental protection and low-carbon consumption concepts are needed. The products are factoryized and industrialized to effectively improve the insulation efficiency, fire safety and expand the application of the products.
However, the current market has emerged as a "composite material for organic materials and inorganic materials" that was abolished by the Ministry of Public Security. Because they are collectively referred to as "composite insulation materials," many people are really difficult to distinguish, and they are deceived.
In this regard, we recommend that you learn how to distinguish test reports. Anyone who claims to be a new national standard fire-resistant B1 grade material must show the test report of the National Fireproof Building Materials Quality Supervision and Inspection Center of the Ministry of Public Security Fire Department. With the test report, it is also necessary to check whether the home page name of the inspection report is a flame retardant B1 grade polyurethane insulation material. In the key place to identify the authenticity, it is necessary to verify the description in the remark column, if the remarks column indicates the insulation material The two-sided composite inorganic sand paddle and calcium silicate board are the back plates, and there is a greasy inside. The flammable or combustible level of the core material may be hidden, which is still a material for disasters. We advocate that enterprises should use the core material of thermal insulation materials to test, so that everyone can see at a glance. Of course, both the composite panel and the core material are simultaneously tested to the flame retardant B1 grade, which will be a more popular material. The Beijing Municipal Construction Committee clearly stated in the "Technical Regulations" that it is necessary to test whether the burning performance of the polyurethane composite board core reaches the B1 level. Any material that does not meet the requirements of the new national standard is resolutely removed from the market. This is for the country and the people to the country. Highly responsible performance. In the previous period, the Fire Department of the Ministry of Public Security conducted a large-scale law enforcement inspection of the color steel plates that had been applied to buildings throughout the country. All the color steel plates that were still flammable or combustible were completely removed, and they were once again praised by the people of the country.
Technological innovation is the only way to develop new polyurethane insulation materials
Nowadays, many research institutes and enterprises have turned to the flame retardant B1 grade R&D of polyurethane core foam. The team has also taken a step forward in research and development. The team has been summing up in recent years, especially the research on the causes of the major building fires such as Beijing CCTV New Site Affiliated Cultural Center, Shanghai Jiaozhou Teacher's Apartment, Shenyang Dynasty Wanxin Building, etc., and proposes the carbonization layer theory of fire control from the source. The theory of fire performance and the theory of inorganic organic hybridization have developed novel polyurethane insulation materials.
According to the carbonization principle of thermosetting polyurethane, the carbonization layer is introduced into the original flammable carbamate molecular structure to introduce a flame-retardant, temperature-resistant, low-smoke, low-toxic cyclic structure compound, forming a non-halogenated carbon-carbon expansion type flame retardant. The technical route and process route make the original flammable polyurethane foam change into a flame retardant material with high oxygen index, small flame propagation, small smoke, low toxicity, good flame resistance and strong flame resistance.
The fire performance theory is aimed at some enterprises who are unclear about the cause of fire and who are in a hurry to go to the hospital and propose a fire performance theory of scientific management. Many R&D units and companies complain that they have qualified test reports. Do not understand why they still have a fire? The team has conducted a large number of investigations to reveal the conditions of small and medium-sized tests, and it is impossible to obtain near-real fire data, only measured in close to real fire scenes. The “fire performance†data can confirm whether there is real combustion performance data. This theory has important theoretical guiding significance for building fire protection, especially for building fire.
The theory of inorganic-organic hybridization is a technological innovation that guides the development of higher-level fire prevention functions of polyurethane materials. Inorganic insulation materials can play a role in suppressing fires in the initial stage of fire, but under the high temperature attack of fire, the original non-combustible inorganic materials will also melt. For example, the steel structure becomes "soft noodles" above 600 °C, and the concrete is Bursting above 300 °C, glass wool is more than 350 ° C embrittlement, rock wool more than 600 ° C will be powdered, so the same "fire performance" is a poor insulation material. CCTV fires and major explosions in Kunshan, Jiangsu Province, were caused by high-temperature ignition of inorganic magnesium alloys.
"Inorganic modified polymer materials" is a new way of innovation. The team will develop “inorganic modified polymer materials†according to the “12th Five-Year National Strategic Emerging Industry Development Plan†of the State Council, and fully utilize the carbonization characteristics of thermosetting polyurethanes based on mature flame-retardant B1 grade polyurethane materials technology. The inorganic nanoparticles or inorganic particles react with the "hybrid bond" of the organic polyurethane to form new types of inorganic modified polyurethane polymer materials of FRP-1, FRP-2 and FRP-3, which can prevent the material from being bombarded. "Fire performance" of burning.
Nowadays, the team has successfully developed new low-carbon, low-smoke, low-toxic and flame-retardant polyurethane materials, and overcomes the three major problems of low-flammability, high smoke and high toxicity of flammable organic thermal insulation materials. The organization SGS test, to achieve the US ASTM E-84 first-class standard, obtained the certificate of authorization for the use of the grade identification of the US authorities. The company has exported its products to Russia, Europe, India, Arabia, Singapore, Hong Kong and other countries and regions.
Inorganic modified polyurethane polymer new material has a stronger cost performance advantage
Polyurethane foam is a highly efficient thermal insulation material. The surface of the material will generate thermal stress with internal stress along with the change of temperature difference between day and night and four seasons. The surface material of the wall will crack with hot cracks due to thermal stress fluctuation. This is also the polyurethane insulation material. A common problem that is difficult to cure.
The inorganic modified polyurethane polymer material developed by the present invention passes through the "hybrid bond" reaction of the nano-insulation material, and the degree of freedom of collision of the interface gas molecules is greater than the size of the pore during the process of mutual exchange of solar radiation heat transfer. Reduce heat transfer, transfer heat from high temperature objects to low temperature objects, thus achieving reflective and thermal insulation. Through the control of thermal stress, not only the polyurethane has thermal insulation function, but also has reflective heat insulation and radiation heat insulation function. Its high heat insulation promotes the low heat storage coefficient and greatly reduces the thermal stress. The compression and stretching reaction, which has completely reversed the polyurethane function, has only a single thermal insulation function. Today, the inorganic modified polyurethane polymer new material has the advantages of the triple function of thermal insulation, reflective heat insulation and radiation heat insulation. The thermal insulation, fire resistance and practicability of the polyurethane foam material are greatly improved.
The new polyurethane materials developed according to the above three principles have successively obtained more than 10 fire-retardant B1 test reports of the GB8624-2006 version of the National Fireproof Building Materials Quality Inspection Center of the Ministry of Public Security and the GB8624-2006 version, such as the flame retardant C1 and GB8624-2012 versions. GB8624-20006 version of October 29, 2012, the combustion performance of the remaining length of the flame retardant C-class standard is ≥ 150 mm, the test result is 94, the total heat release standard requirement is ≥ 15 mm, the test result is 2.1, Meet national standards. According to GB8624-1997 standard, the oxygen index is ≥32, the highest is 36; the smoke density SDR is ≤25, the lowest is 15. Now, according to GB8624-2012, the oxygen index is above 32. These data are difficult to achieve in many domestic enterprises.
What is deteriorating the development of the polyurethane industry today is the problem of excessive material development costs. The same flame retardant B1 insulation material, polystyrene board (EPS, XPS) is much lower than polyurethane (PU). In the entire Chinese external wall insulation city, polyurethane insulation materials only account for about 10%, and there are only a few thousand enterprises. The annual output value is over ten million, and there are only ten or so, regardless of the scale, output value and market share of the company. Competing, the cost of polyurethane insulation materials does not have an advantage.
According to the China Polyurethane Industry Association, large-scale enterprises with mature technologies in China's polyurethane industry generally control the cost at 1,600 yuan per cubic meter, while small businesses generally have 1,800 yuan per cubic meter, while XPS costs 650 yuan per cubic meter, and EPS per The cubic meter is 350 yuan, and the difference between the two square meters can be as high as 73 yuan. The problem now is that in order to survive, regardless of the blood, the domestic enterprises have sought market share by reducing the standard and vicious price reduction competition at a price of 1,100 yuan to 1,200 yuan per cubic meter. This disgusting competition has severely affected the survival of formal enterprises. To this end, the industry association has issued a self-discipline initiative to regulate the production order of polyurethane products nationwide.
Polyurethane is by far the best quality insulation material in the world, but China's polyurethane insulation material is only 10% in the domestic market, compared with 57% in the US and 32% in Japan. China is too backward. We believe that China has full conditions to achieve the level of polyurethane in China's foreign wall insulation market rose to 40% or even 50%, the key to the rise in the market share of polyurethane insulation materials in China is technological innovation.
Now, according to the State Council's “Twelfth Five-Year National Strategic Emerging Industry Development Planâ€, we are required to develop the cost price of “inorganic modified polyurethane polymer new materialâ€, through technological innovation such as tapping potential and formula of raw materials, without reducing raw materials. Under the premise of physics, chemistry and function, the cost price can be greatly reduced, and the gap between the cost price of polyphenylene system (EXS and XPS) can be shortened. If you are interested in working with the team to obtain a product upgrade service, you can ask the team for the internal information "polyurethane core material new national standard flame retardant B1 level cost price".
Under the leadership of the industry, the team is willing to upgrade the enterprise products.
The development of the team's scientific and technological achievements has recently been actively supported by the academicians of the China Association for the Advancement of Science and Technology and the energy conservation and emission reduction industry alliances of the Ministry of Housing and Urban-Rural Development. The results have been published in many domestic magazines and media. The results of the recent team have been selected in the Chinese Academy of Sciences. In the large-scale literature special edition of "Science and Technology Innovation Leading the Development", the inorganic modified polyurethane polymer materials we have developed today will be selected into the large-scale literature of "Collaborative Innovation Drive Industry Development" to be edited and published. The team will be based on the China Polyurethane Industry Association. And the requirements of the Shanghai Polyurethane Industry Association, is willing to create a new situation in China's polyurethane insulation materials business, for the upgrading of enterprise products.
Brass Hose Fittings,Hose Pipe Connector,Brass Hose Nipple,Brass Pipe Hose Nipple
Jiangmen Xinhui Yilin Co.,Ltd , https://www.ylseiko.com