High rise building external wall thermal insulation waterproof coat - Waterproof vapor permeable membrane
The number of high-rise buildings in cities is increasing. With the continuous growth of building height, the fire prevention of buildings 、 Fire resistance 、 The requirements for grade are constantly improving, and higher requirements are also put forward for building materials. Building materials that meet the fire protection requirements and have thermal insulation properties are gradually increasing. Rock wool board is a new type of fire protection in cold regions 、 Thermal insulation material is the fire protection of high-rise buildings 、 The disadvantage of thermal clothing and rock wool board is that they absorb moisture and expand, and the expanded rock wool board will lose its thermal insulation performance 9# In order to ensure the fire prevention of rock wool board 、 Thermal insulation performance, a layer of waterproof and vapor permeable membrane is laid outside the rock wool board 。 Waterproof breathable membrane is a new type of polymer waterproof material 。 From production 、 In terms of production technology, Waterproof breathable membrane Technology of 、 The quality requirement is much higher than that of ordinary waterproof materials; In terms of quality, Waterproof breathable membrane It also has functions that other waterproof materials do not have 、 Performance and other characteristics 。 Waterproof breathable membrane The special fiber structure can prevent the erosion of the building structure by the wind and rain, and the waterproof and breathable film can enhance the air tightness of the building 、 At the same time of water tightness, its unique vapor permeability can make the water vapor in the enclosure structure rapidly discharged, effectively avoid the formation of mold and condensation in the structure, protect the thermal performance of the enclosure structure, so as to save energy consumption and improve the durability of the building. The waterproof breathable film is used to protect the environment of human living, and it can solve the waterproof problem of the building 、 moisture-proof 、 Steam permeability improves the health of human habitation. People oriented, it is a new type of healthy and environmentally friendly energy-saving waterproof material 。 Waterproof and breathable membrane is applied to residential buildings and public buildings. Waterproof and breathable membrane building structure is known as “ Breathable house ”。
1 Waterproof breathable membrane Material composition and material performance Waterproof breathable membrane, Europe Advanced technology, waterproof and breathable membrane mainly includes three Layer material
Composition: made of high-density spunbonded polyethylene non-woven fabric Polymer vapor permeable membrane High density spunbonded polyethylene non-woven fabric through too Hot pressing Legal system 。 High density spunbonded polyethylene non-woven fabric in waterproof and breathable membrane is mainly used to enhance the tensile bearing capacity and static water pressure of waterproof and breathable membrane and protect the middle layer (polymer breathable membrane). The real permeability of waterproof and breathable membrane mainly depends on the polymer breathable membrane in the middle layer 。
2 Main advantages of material properties
2.1 Waterproof breathable membrane waterproof, breathable macromolecule waterproof breathable membrane material introduces hydrophilic base, so that waterproof breathable membrane not only has good waterproof effect, but also has good vapor permeability 。 The pores of the waterproof breathable membrane are curved. Under the state of water vapor, the water particles are very small. According to the principle of capillary movement, the water vapor can smoothly penetrate the capillary to the other side, resulting in vapor permeability 。 When water vapor condenses into water droplets, the particles become larger, and the water structure is a molecular group. Due to the surface tension of water droplets (water molecules interact with each other “ Pull and contend ” ） , The water molecules can not escape from the water drops and penetrate to the other side smoothly, blocking the curved pores to prevent water from passing through, which means preventing water infiltration and making the vapor permeable membrane waterproof 。 Water vapor permeability: greater than one 00 zero g/m2. 24H ， Hydrostatic pressure ： one 5m The water column height is placed on the waterproof breathable membrane, two Hour impervious 。
2.2 High strength waterproof breathable film The tensile strength in both vertical and horizontal directions of waterproof breathable film is increased to two 00N ／ 50mm , the tear strength of nail bar is up to fifteen 0N Above, it is not easy to be damaged during construction 。
2.3 Waterproof breathable film is resistant to high temperature, slow aging, and has a high durability. Waterproof breathable film has a high degree of slow aging, flat surface, no wrinkles, no bubbles, good composite firmness, high strength and permeability, slow aging, high temperature resistance, and can achieve temperature resistance eighty Above, ensure the durability and service life of the material, and the durability life is two zero year 。
