Since January, fire accidents have continued everywhere. At the same time, people are also looking for hidden dangers behind frequent fires. Many people think that this is related to the quality of building exterior materials, especially insulation materials. At this time, a poll by Shandong Radio and Television Station, "the exterior wall insulation is tricky: the inferior sheet is flammable and buried a huge fire hazard", and the external wall insulation material is pushed to the cusp. In this regard, many insulation material manufacturers scream: there is no absolute direct relationship between fire and insulation materials, and there are many types of insulation materials, which should be applied according to different environments. In this issue, we interviewed 6 different insulation material manufacturers, representing the most common 6 types of insulation materials on the market. They hope to enhance their understanding of insulation materials through their own “recognitionâ€. Polyurethane composite insulation board Maximum protection against thermal bridges The polyurethane composite insulation board is made of fireproof mortar reinforced coil surface layer, and the inner rigid foam polyurethane insulation material can prevent the heat bridge function to the greatest extent, and fully meet the performance requirements of China's building insulation and fire protection specifications. The rigid foam polyurethane reinforced coil composite thermal insulation board for building insulation is made of fire-resistant polymer mortar glass fiber mesh cloth as a surface layer, which is obtained by continuous foaming of rigid foam polyurethane. The two sides of the structure are fire-retardant polymer mortar reinforced coil surface layer, and the inner rigid foam polyurethane insulation material has the characteristics of good heat preservation effect and good fireproof performance, which can prevent the heat bridge function to the greatest extent and meet the performance of any building insulation fireproof specification in China. Claim. Nowadays, the country has begun to implement the “Building Energy Saving 65%†policy in Beijing, Shanghai, Qingdao, Dalian, Shenzhen and Tianjin. At the same time, Shandong, Henan and other regions have also begun to implement the 65% energy-saving standard. After the implementation of the 65% energy-saving standard, the thickness of the insulation layer implemented in the past 50% energy-saving standards in all regions will increase by more than 30%. However, because the thickness of the insulation layer increases, it will not only lead to the extension of the construction period, the increase of the construction cost, but also the diversification of the exterior style of the building. The more important thing is that the insulation layer is too thick, and the surface may be cracked by the surface tile or the coating paint. Sex will also increase. The use of rigid foam polyurethane reinforced coil composite thermal insulation board can achieve higher energy-saving standard requirements without increasing or even reducing the thickness of the insulation, thereby avoiding many problems caused by the increase in thickness. At present, Tianjin Fire Research Institute and Sichuan Fire Research Institute both believe that the comprehensive performance of Yantai Wanhua's rigid foam polyurethane composite board with fire-resistant reinforced coils reaches Grade B, and the comprehensive fire performance of the insulation system reaches Grade A. This provides policy and technical guarantee for our company to produce and promote the use of rigid foam polyurethane fireproof reinforced coil composite insulation board. Polyurethane reinforced coil composite insulation board has doubled every year since it entered the market. It will become the mainstream insulation product system of China's building exterior wall insulation market in the future. In a long period of time, polyurethane insulation materials will lead China's thermal insulation materials. market. -He Rui (Technical Manager) Vacuum insulation board Low thermal conductivity and good heat insulation Vacuum insulation panels not only have high compressive strength, but also have very low thermal conductivity. The biggest advantage of this product is that its insulation performance can be proud of all other types of insulation materials. The vacuum insulation board is made of inorganic fiber core material and high-resistance gas composite film by vacuum packaging technology, and is covered with special interface mortar to make a high-efficiency insulation board. The vacuum insulation board not only has high compressive strength, but also has extremely low thermal conductivity. The product has super insulation performance and is light and high strength, and is the latest thermal insulation material. Due to its excellent performance, it is widely used in various fields such as building wall insulation, aerospace, transportation, medical incubators, and various thermal insulation boxes. The thermal conductivity of air is about 0.023W. The thermal conductivity of vacuum insulation panels is the lowest among existing insulation materials. The biggest advantage, that is, its thermal insulation performance can be proud of all other types of insulation materials. However, due to the relatively high cost of the product, its price/performance ratio is not great. In order to reduce the cost of use, we recommend that customers consider the use of a balcony panel to prevent cold bridges. The practice shows that the 500 mm wide vacuum insulation panel can be used to isolate the thermal bridge on the balcony panel. The balcony panel does not need to be covered with a large area of ​​3 cm thick extruded panels. The vacuum insulation board for construction mainly has problems such as safety bag up, gas leakage, core material decay, etc., which directly affects the change of the main technical index "thermal conductivity" of the vacuum insulation board, and thus affects the insulation performance of the vacuum insulation board. Solving the durability of the vacuum insulation of building vacuum insulation panels is the key to the technology. In addition, through many visits to similar foreign companies, we found that foreign companies usually use the edge-sealing structure design and optimization procedures to reduce the thermal bridge effect, and the effect is significant. The company intends to introduce this project. At present, there are not many enterprises that develop vacuum insulation panels in China, and the quality of vacuum insulation panels is somewhat different from that of foreign countries. However, we hope to have a place in the market with the attention of low-cost and low-carbon economy made in China. - Wang Shugu (Technical Consultant) Aerogel insulation board Keep warm while blocking infrared radiation The gel insulation board has the advantages of high temperature resistance, low thermal conductivity, low density, high strength, environmental protection, waterproof and non-combustible, and at the same time, it has excellent sound insulation and shock absorption performance, and can also block infrared radiation at ambient temperature. The aerogel material is called the world's lightest solid, and the aerogel insulation board is made of nano-silica aerogel as a main material and is compounded by a special process. Aerogel insulation board has excellent performances such as high temperature resistance, low thermal conductivity, low density, high strength, environmental protection, waterproof and non-combustible, and has excellent sound insulation and shock absorption performance. It is indispensable in metallurgy, chemical industry and national defense. Efficient insulation material. In addition to excellent thermal insulation properties, aerogel can effectively transmit visible light in sunlight and block infrared radiation at ambient temperature. For example, silica aerogel has a high operating temperature, even at 900. It still has a porous network structure at high temperatures, and it does not burn and has good fire resistance. However, at present, the research and application of aerogel insulation panels in the field of building energy conservation is still in its infancy, the aerogel strength is low, the toughness is poor, and the preparation process is complicated, so that its cost is slightly higher, so the aerogel is strengthened and toughened. And cost research has become the key to its large-scale application as a high-performance transparent insulation material in the field of building energy efficiency. Existing building energy-saving glass, such as insulating glass, vacuum glass, Low-E glass and foil glass, has played a certain role in building energy conservation, but it has reduced the glass insulation performance while reducing the glass to varying degrees. The permeability, and the application of aerogel as a new light-transmissive insulating material in building energy-saving glass has attracted more and more attention, and has a very broad development and application prospects. Although the low strength and poor toughness of aerogels limit its large-scale application in current building energy conservation, with the deepening of the research on aerogel preparation process and performance, it is a new building energy-saving glass material. It will showcase not only the energy consumption of buildings but also the emission of carbon and other harmful substances. - Li Ke (Director of Technology Center) Phenolic insulation board Meeting two standards at the same time is favored Phenolic insulation board is a porous phenolic foam board made of a polycondensate of phenol and formaldehyde mixed with other additives. A phenolic board has been widely used in Japanese building insulation systems. The phenolic insulation board is a porous phenolic foam board made of a polycondensate of phenol and formaldehyde mixed with other additives such as a curing agent, a foaming agent, a surfactant, and a filler. In recent years, developed countries such as the United States and Japan have taken the lead in turning to phenolic insulation boards that are both energy-saving and fire-resistant. At present, phenolic sheets produced abroad have better thermal insulation properties, and their thermal conductivity is lower than that of extruded polystyrene sheets. In particular, phenolic sheets have been widely used in Japanese building insulation systems. However, the current domestic promotion efforts are small, the production technology is relatively backward, and its thermal insulation performance is slightly worse than foreign products. In 2009, the Ministry of Public Security and the Ministry of Housing and Urban-Rural Development jointly formulated the Interim Provisions on Fire Protection of Civil Building Exterior Insulation Systems and Exterior Wall Decorations, requiring that the combustion performance of civil building exterior insulation materials should be Class A and should not be lower than B2. In 2011, the Fire Department of the Ministry of Public Security issued a Notice on Further Clarifying the Relevant Requirements for Fire Supervision and Management of Civil Building Exterior Insulation Materials, requiring that the standard for the use of thermal insulation materials for civil buildings should not be lower than Class A. To break the roots of the fire from the roots. At present, both standards are being implemented at the same time, which makes the manufacturers of thermal insulation materials and the department responsible for inspecting fires have a headache. Although there is a certain conflict between the two standards, the focus is still on the fire performance of the exterior wall material. The closer to the A grade, the better the phenolic foam board can meet both standards. Fortunately, the composite phenolic foam board developed by most domestic enterprises has been tested by the National Fireproof Building Materials Quality Supervision and Inspection Center, and its combustion performance has reached GB8624A. This shows that phenolic foam board as a safe, green new energy-saving building material, its advantages have been recognized by the construction department and the public security fire department. At present, the company uses phenolic fireproof and thermal insulation materials as its main products, and has two automatic continuous production lines to fill the gaps in fire protection and insulation required by the Ministry of Housing and Urban-Rural Development after major fires in recent years, providing safe, environmentally friendly and energy-saving building materials for the society. - Wu Qiong (Technical Engineer) Extruded polystyrene board The industry does not need to correctly understand the flame retardant misunderstanding Extrusion polystyrene board not only keeps heat, but also integrates waterproofing and heat preservation. It has high rigidity and low thermal conductivity. It is suitable for interior insulation of roof, floor and basement wall covering soil. A rigid foamed article having a closed cell structure obtained by extruding a polystyrene board with a polystyrene resin or a copolymer thereof as a component, adding a small amount of an additive, and heating and extruding. Extrusion polystyrene board is also a material that integrates waterproofing and heat preservation. It has high rigidity, good compression resistance and low thermal conductivity. It is suitable for interior insulation of roof, floor and basement wall covering soil. Extrusion polystyrene board contains flame retardant additive to prevent accidental fire caused by small fire. However, since the extruded polystyrene board product itself is a combustible material, it will burn rapidly if it is directly exposed to a strong fire source. Extrusion plates with flame retardant additives can prevent accidental fires caused by small fires. A cigarette butt or cutting spark can not cause accidental fire to the extruded board, but there is a strong and continuous source of fire that can still burn quickly and cause fire, similar PVC floor tiles or floor leather, the cigarette butts can not cause fire, but they can be burned quickly by placing them in the fire. The role of flame retardants in extruded polystyrene boards in continuous sources of ignition is very limited. With the continuous deepening of building energy conservation, the application of extruded board will become more and more extensive, but the accidents of extruded polystyrene board are gradually increasing due to the paralysis of the use unit and the lax management of the construction site. Analysis of the causes of engineering accidents, in addition to the stability of product quality, the most fundamental reason is that management and operators have misunderstandings about the extrusion of polystyrene board, personally think that in addition to improving product quality, It is important to change the concept and correctly understand that extruded polystyrene board is a kind of combustible material, even if it contains flame retardant extruded board (B2 grade), such as the construction site does not strictly implement fire prevention related regulations, if there is a continuous fire source It can still burn quickly and cause an accident. Extrusion polystyrene board production enterprises should be more realistic, do not exaggerate the role of flame retardants and the function of the fire-extinguishing extruded board, and evaluate the use range of the extruded board with an objective attitude to avoid potential safety hazards. - Tang Huyu (technician) Real gold plate Poor durability seriously hinders development speed The real gold plate is processed by phase change wrapping and heat storage technology, and has a heat-breaking continuous honeycomb structure, and the fire resistance of the modified treatment reaches A2 level. The real gold plate is processed by phase change wrapping and heat storage technology, and has a heat-breaking continuous honeycomb structure, and the fire resistance of the modified treatment reaches A2 level. True gold plate A-class fire insulation board is a thermosetting insulation material, which can be applied to civil external wall insulation system, effectively reducing energy consumption and fully meeting the national 65% energy-saving application standard. When the real gold plate is used for the partition wall, the hollow part is better equipped with the fireproof sound-absorbing foaming board. The basic principle of the real gold plate is to use the "particle fire barrier film" technology, the copolymerization modification is used to make the EPS monomer particles have the same characteristics as the fireproof material, and the microphase composite technology is used to form the fireproof separator on the surface of each organic particle. So that each particle forms a relatively independent organic particle fire protection unit. In the case of a flame, a heat-breaking continuous honeycomb structure is blocked, which blocks the propagation and penetration of the flame and prevents the occurrence of combustion. The real gold plate insulation board can be combined with the actual construction conditions according to the design characteristics and functional requirements of the project, and it is highly operable. According to incomplete statistics, among the nearly ten kinds of external wall insulation materials popular in the market, the cost of rock wool and vitrified microbeads is relatively high, and the market price of good rock wool is basically fixed at 5,000 yuan/ton or more. The recent market of vitrified beads is relatively low, and many manufacturers have started a price war, but even so, the price is around 2,000 yuan / ton. As the cost increases, the budget will increase. Compared with the low-grade B-grade materials such as extruded board and polystyrene board, the fire performance is seriously insufficient and there are many safety hazards. The real gold plate A-class fire insulation board is not only cost-effective, but also has obvious advantages. In addition, the construction process and the polystyrene board system are the same. The mature application in China for more than ten years has been applied abroad for 7-8 years, saving costs and not adding additional construction links. It is a pity that the durability of the real gold plate is not good and it is prone to aging. The guarantee period is generally 6 years. When it is 60 °C, it will rapidly age and produce harmful volatiles. This deadly point seriously hinders its development. speed. -Cao Zhiwei (Technician) expert's point The problem of mutual exclusion of price and standard needs to be solved China's current building energy-saving goal is "to strive to achieve the basic requirements of urban buildings in summer when the room temperature is lower than 30 ° C, and in the heating area to reach 18 ° C in winter." Based on this, each construction unit is required to adopt a variety of effective energy-saving technologies and management measures to reduce the energy consumption per unit area of ​​newly built houses to a large extent, and carry out planned energy-saving renovation of the original buildings. In this regard, Qu Hongle, the person in charge of the renovation of the Construction Department of Shaanxi Province, said that in order to achieve this building energy-saving goal, it is necessary to comprehensively promote high-efficiency wall and roof insulation materials in civil and public buildings. Xu Hui, an expert from Henan Construction Engineering Group, said that China's housing is rarely considered to adopt thermal insulation measures, mainly reflected in “winter cold and hot summerâ€. In addition to accelerating the development and research and promotion of building energy-saving materials and building energy-saving technologies, optimizing the urban energy structure and actively promoting the reform of urban heating systems, it is also important to adopt appropriate wall materials and reasonable structures. Fortunately, China has made breakthroughs in the insulation technology of external walls. The exterior wall of the building adopts external thermal insulation technology, which not only improves the comfort of living, but also has very good energy-saving effect and comprehensive economic benefits. With the continuous improvement of building energy-saving requirements and comfort requirements in China, the demand for external thermal insulation is becoming more and more urgent, and the external wall insulation technology market must be rapidly expanded. However, the advantages of new wall insulation materials are many. Why is it difficult to promote large-area buildings in real buildings? The author interviewed some construction companies. Most builders believe that the use of new wall insulation materials will greatly increase the cost of construction. Therefore, they generally do not want to use it unless it is mandatory by the government. However, according to a deputy chief engineer of Beijing New Building Materials Co., Ltd., although the promotion of new wall insulation materials will increase the cost (average 5% to 7% of the total construction cost), but for the development of most cities in the country. For business, this is an affordable price. Moreover, the increase of 5% to 7% of the investment to achieve energy savings of 50% to 60% of the standard, in any case is cost-effective. Moreover, the increased cost is expected to be recovered within 5 to 8 years. Li Gongqian of China Housing Industry Promotion Center also has the same view. She believes that high-energy buildings, although the cost of pre-production costs is slightly lower, the energy consumption of insulation for 50 years has far exceeded the cost of previous savings. At the same time, the industry's call for the development of insulation materials standards is also growing. However, the standards set are not easy, the standards are high, the selling price is high, and the people are unbearable; the standard is low and the threshold is ineffective. Therefore, the formulation of technical standards and norms must be compatible with the current level of economic development and the level of technological development in China. In other words, the price and standard issues of wall insulation are also issues that we need to address urgently. Epoxy Chips,Vinyl Chips Flakes,Rock Flake Chips,Color Flakes Chip Jiangxi Tiansheng New Materials Co.,Ltd , https://www.jx-tis.com
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