Polyurethane rigid foam insulation material for construction industry is an important branch of polyurethane industry. It is characterized by multi-purpose, and has the functions of heat preservation and waterproof. Polyurethane rigid foam insulation material for construction industry is an important branch of polyurethane industry. It is characterized by multi-purpose, and has the functions of heat preservation and waterproof. These products have been used for 40 years in the construction industry in Europe since the 1960s. Some countries have also adopted legislation to design polyurethane as a thermal insulation material for the construction industry. In recent years, with the rapid development of China's building energy-saving market, polyurethane rigid foam insulation products have been widely used in the field of building insulation and waterproofing, and have become one of the leading energy-saving products in the market.
Polyurethane (i.e., polyurethane, abbreviated as PU) is a polymer compound containing a plurality of repeating -NHCOO groups on a polymer primary bond. Polyurethane series products are generally polymer compounds obtained by polymerization of binary or polybasic organic isocyanates and polyols under the action of various auxiliaries. If both main materials contain only two or less hydroxy functional groups, The polymerization reaction obtains a compound having a linear structure. If one or both of the main materials have three or more functional groups, a polymer having a bulk structure can be obtained, and the properties are different due to the structure of the polymer. big difference. Just like steel, although it is iron-carbon alloy, the iron-carbon ratio is different, the heat treatment process is different, and its performance is completely different. Polyurethane raw materials are widely used in various industries. Due to the different industrial characteristics and products produced, the performance requirements of composite materials with polyurethane as the main raw material are also different. Polyurethane rigid foam (SPF), which is responsible for thermal insulation and waterproofing, is also completely different from polyurethane (PUR), which is only used for heat preservation in refrigerators and cold storages. Although their appearance looks very similar, as a building insulation and waterproofing integrated material, polyurethane Hard foam breaks the traditional building materials "target=_blank>The building materials have a single function, the waterproof is not insulated, the insulation is not waterproof, and the waterproof layer will leak if it leaks, and the insulation layer will lose the heat preservation function. It is compatible with other single-function insulation or waterproof materials. Compared with polyurethane rigid foam, it has obvious advantages:
1. Polyurethane rigid foam has a multi-purpose function, and has many functions such as heat preservation, waterproof, sound insulation and vibration absorption;
2. Excellent thermal insulation performance, is currently the lowest thermal conductivity of all building materials in China [ target=_blank> building materials (≤0.024, green environmental protection fluorine-free foaming technology), the highest thermal resistance material, thermal conductivity is only EPS foaming Half of the benzene board;
3. Polyurethane rigid foam continuous dense skin and nearly 100%% high strength interconnected wall closed pores, with ideal water impermeability. The spraying method is adopted to achieve continuous and seamless joint of waterproof and thermal insulation layer, forming a seamless roof and an integral outer wall thermal insulation shell, which is excellent in waterproof and impermeability;
4. Super self-adhesive performance (no need for any intermediate bonding material), strong adhesion to roof and exterior wall, good wind resistance and negative wind pressure resistance;
5. The overall spraying construction completely eliminates the “hot section†and the “cold bridgeâ€;
6. Flexible grading technology can effectively prevent cracking of waterproof layer;
7. Mechanized operation, automatic batching, uniform quality, short construction period;
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