organic material
1. Organic insulation materials are mainly polyurethane foam, polystyrene board, phenolic foam, etc.
2. Organic thermal insulation materials have light weight, good processability, high density, and good thermal insulation effects, but the disadvantages are: non-aging resistance, large deformation coefficient, poor stability, poor safety, easy burning, and poor environmental protection. , The construction is difficult, the engineering cost is high, its resources are limited, and it is difficult to recycle.
3. The excellent thermal insulation effect of traditional polystyrene board and inorganic thermal insulation board is widely used in the wall insulation material market in China, but it does not have safe fire protection performance, especially the poisonous gas generated during combustion. In fact, the use of such materials In developed countries, it has long been restricted to very small applications. Fire accidents caused by the large-scale use of polystyrene board insulation materials in Chinese buildings have caused huge economic losses and personal injuries.
4. Economic: Low comprehensive cost.
Since the State Council's Opinions on Strengthening and Reconstructing Consumer Work (Guo Fa [2011] No. 46), polyurethane (PU) insulation materials have seen an upward trend in the domestic construction market. In 2012, the Fire Bureau of the Ministry of Public Security No. 350 announced that since the formal cancellation of the implementation of Circular 65, the domestic thermal insulation material market has undergone significant changes: the Class A inorganic thermal insulation material market has declined sharply, the organic thermal insulation material has increased significantly, and the PU building thermal insulation material production capacity, output and market have seen unprecedented growth. Growth momentum. There will be huge development space for B1 grade polyurethane spray insulation materials, PU inorganic composite sheet materials and structural flame retardant PU insulation materials.
PU building insulation materials should continuously strengthen the quality and stability, continuously improve technology, and continue to adhere to industry self-discipline to maintain a sustained, stable and healthy development momentum. This article introduces the application status and development trend of China's PU insulation materials in the field of building energy conservation for reference by colleagues.
National and local policies promulgated in 2012 paved the way for the popularization and application of PU building insulation materials.
Circular 1.65 lifts shackles for the promotion and application of PU insulation materials
On December 3, 2012, the Fire Bureau of the Ministry of Public Security issued the “Notice on Matters Concerning Fire Supervision and Management of Civil Building Exterior Insulation Materials”, that is, the 350th Announcement of the Fire Bureau of the Ministry of Public Security in 2012, and decided not to implement the 2011 3 Document 65 issued on the 14th.
After the promulgation of Document No. 65, the policy limits the application of PU exterior wall insulation materials in the building energy saving market, which is extremely detrimental to the promotion of PU building insulation materials. The termination of the implementation of Document No. 65 indicates that the requirements for the use of fire-resistant grade A materials for the insulation of building exterior walls have been formally revoked. Circular No. 350 means that from the aspect of fire safety policy, it is clear that PU exterior wall insulation materials are allowed to be used in building exterior wall insulation systems in the future, thus giving PU insulation materials a hard-won development opportunity.
On March 3, 2012, the Beijing Municipal Public Security Bureau, the Beijing Housing and Urban-Rural Construction Commission, and the Beijing Municipal Planning Commission jointly issued a notice on strengthening the use of external insulation materials and fire safety management in comprehensive renovation projects in old communities.
The document stipulates the requirements for strengthening the management of the use of external thermal insulation materials in buildings. For external thermal insulation projects in the comprehensive renovation of old residential quarters in Beijing, thermal insulation materials with Class A combustion properties and thermosets with "Composite Class A combustion properties" shall be used. Insulation Materials". According to the document, for existing building renovation projects in Beijing, Grade A and composite Grade A thermosetting insulation materials are allowed.
"Class A composite thermosetting material" is equivalent to Class A inorganic flame retardant material in fire and flame retardancy. According to this regulation, composite thermoplastic materials cannot be used even if they reach flame-retardant A grade. This regulation is a profound lesson learned from several major fires in China.
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