As a building insulation material, polyurethane rigid foam breaks the traditional building material function. It is not waterproof, and it is not waterproof. If the waterproof layer leaks, the insulation layer will lose its heat preservation function. Compared to other single-function insulation or waterproof materials, polyurethane rigid foam 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 (0.024), the highest thermal resistance of thermal insulation materials, thermal conductivity is only half of EPS foam polystyrene 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 the roof and exterior wall, good wind resistance and negative wind pressure resistance; overall spray construction, completely eliminate "hot section" and "cold bridge" The flexible gradient technology can effectively prevent the cracking of the waterproof layer; mechanized operation, automatic batching, uniform quality, fast construction and short cycle.
5. It has stable chemical properties, long service life and no pollution to the surrounding environment. It is self-extinguishing from open flame, and it only carbonizes and does not drip when burning. The size and shape of the carbonized layer are basically unchanged, which can effectively block the entry of air and prevent the fire. Spread, fire safety performance is good.
As the only new building materials for thermal insulation and waterproof integration, the application of polyurethane rigid foam insulation materials in the domestic construction industry is still in the initial stage. Fortunately, in order to accelerate the innovation of building insulation materials and promote the promotion and application of polyurethane rigid foam in the field of building energy conservation, the Ministry of Construction has specially established the “Polyurethane Building Energy Saving Application Promotion Working Group†to promote polyurethane rigid foam insulation and waterproof materials in domestic construction. Application in the energy saving industry.
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