The taste of late autumn is getting stronger and stronger. It is not only the wearing of clothes, but also the warmth of the home. Wall insulation is an important part of home insulation work. It is divided into exterior wall insulation and interior wall insulation. The amount of interior wall insulation engineering is much smaller than that of external wall insulation. Xiaobian today shares the advantages and disadvantages of various interior wall insulation materials.
Polystyrene foam board Polystyrene foam board is one of the three common interior wall insulation materials. Also known as a foam board or an EPS board, it is a white object which is formed by heating a pre-formed expandable polystyrene bead containing a volatile liquid foaming agent and heating it in a mold. It has the structural characteristics of fine closed cells, and is mainly used for building walls, roof insulation, and composite board insulation. Divided into expansion EPS board (benzene board) and continuous extrusion type XPS board (extruded board).
Advantages——1. The polystyrene foam board has a small density coefficient and good impact resistance. It has sufficient capacity to buffer the external impact force by changing and reverting the shape. 2. It has an independent bubble structure, and the damage of a small area will not be affected. To the entire wall; 3, its surface water absorption is low, anti-permeability is good, can effectively avoid the wall surface problems such as mold, fall off after the wall is wet; 4, not affected by temperature. At high temperatures, the polystyrene foam board will not melt and flow due to excessive temperature. At low temperatures, it will not be brittle due to low temperature. 5. Polystyrene foam is a recyclable material that can be recycled and recycled. The degree is the highest in plastics; 6. Freon is not used in the production process; 7. The energy consumption in the whole life cycle is the lowest among plastic products.
Disadvantages——1. Construction requires hanging nets, the construction process is cumbersome and the construction period is long; 2. It is flammable and produces toxic gases after combustion. Ordinary polystyrene foam insulation board is easy to burn, and the smoke generated by combustion is toxic. Even after adding flame retardant, the flammability can only reach Grade B. 3. The material strength is poor, cracking is easy to occur, and the insulation layer is peeled off. More common; 4, polystyrene foam insulation board due to its own strength is limited, bearing capacity is poor, the need to strengthen the treatment of veneer brick; 5, polystyrene foam insulation board quality is unstable, because the material needs to be placed for a period of time before leaving the factory, It can be used after a period of maturity. If it is not matured, the quality will not be guaranteed, resulting in shrinkage and cracking of the foam board.
Polyurethane foamed polyurethane foam is also one of the three common interior wall insulation materials. It is a special polyurethane product which is filled with a polyurethane prepolymer, a foaming agent, a catalyst and the like in a pressure resistant aerosol can. When the material is ejected from the aerosol can, the foamed polyurethane material rapidly expands and solidifies to react with the air or the moisture in the contacted matrix to form a foam.
The solidified foam has various effects such as caulking, bonding, sealing, heat insulation and sound absorption, and is an environmentally-friendly, energy-saving and convenient building material. But it is also a very flammable substance.
Advantages - 1, good insulation performance. The thermal conductivity is about 0.025, which is a good material for building insulation; 2. The waterproof performance is good. The foam hole is closed, the sealing rate is 95%, and the rainwater does not seep through the hole; 3. Due to the on-site spraying, the overall waterproof layer is formed, there is no seam, no polymer coil is too late, and the maintenance workload is reduced; 4 ,. Good bonding performance. It can be bonded to wood, metal, masonry, glass and other materials very firmly, not afraid of strong winds; 5, for new roofing or old roof maintenance is very suitable, especially the old roof repair, do not need to remove the original waterproof layer and Insulation layer, only need to remove the surface of the ash, sand debris, you can spray; 6, construction is simple and fast. It can spray more than 200 square meters per work per day, which is conducive to the progress; 7. The structure of the closing head is simple. The sprayed polyurethane polyurethane tip is greatly simplified without special treatment. If the coil is used, at the wall of the daughter, the groove should be left and the head should be in the groove; if the groove cannot be left, the flat iron seal should be used to close the head, and the seam paste should be coated; 8. Good economic benefit. If the insulation layer and the waterproof layer are separated, not only the cost is high, but also the construction period is long, and the foamed polyurethane survives once; 9. Good resistance to aging. According to the foreign engineering summary and research tests, the aging resistance of polyurethane foam can reach 30 years.
Disadvantages - 1, at a temperature below 10 ° C, the foaming rate of polyurethane foam will be reduced. Therefore, it is obviously restricted by the season when used; 2. The speed of polyurethane foam spraying is fast, it is not easy to make a smooth spraying effect, and the unevenness is a normal phenomenon; 3. For roof waterproof insulation, the flatness can be relaxed, but The flatness of the gutters and gutters is not good and will affect the drainage flow rate. Therefore, it must be used in conjunction with other waterproof materials.
Glass fiber insulation cotton fiberglass cotton is an inorganic non-metallic material with excellent performance and is one of the three common interior wall insulation materials. It is made of glass ball or waste glass, which is made by high-temperature melting, drawing, winding, weaving, etc. The diameter of the monofilament is several micrometers to twenty meters micrometers, which is equivalent to one hair. 1/20-1/5, each bundle of fiber strands consists of hundreds or even thousands of monofilaments.
Glass fiber insulation cotton has the characteristics of good insulation, strong heat insulation, good sound absorption, long fiber and high tensile strength. Widely used in building air conditioning insulation systems, decorative wall insulation, decorative ceilings, as well as equipment insulation in the chemical, electric power and other industries.
Advantages - 1, good insulation. Glass fiber cotton has numerous fine gas pores, the fibers are irregularly arranged, the heat conduction fineness is 0.03w/cm.k, which is an excellent heat insulating material; 2. It has non-combustibility. Glass fiber cotton will not burn, no deformation, no embrittlement, can withstand 700 ° high temperature, its combustion performance reaches A1; 3, environmentally friendly and non-toxic. Since the glass fiber cotton does not add any binder during the manufacturing process, it does not have any odor, and does not emit toxic, pungent smoke, odor, etc. when exposed to high temperature; 4. High insulation. Since the raw material used for glass fiber cotton is glass, it is not conductive, so it has a relatively high insulation; 5, corrosion resistance. Glass fiber is not afraid of strong acid, and has strong corrosion resistance. Even if it is used for a long time, it will not reduce its functional characteristics; 6. Good recovery. There are countless fixed air pockets in the glass fiber, which has excellent recovery, is not afraid of any impact vibration, and the tensile strength is above 1.0kg; 7. It does not absorb water. The moisture absorption rate of glass fiber is usually close to zero, and there is no need to worry about the occurrence of moisture cracking due to water swelling.
Disadvantages - 1, the production of raw materials is glass, the same is the disadvantage of glass brittle easily broken; 2, poor wear resistance. Prolonged use can easily cause damage, and if sharp objects are scratched on the surface, it will cause irreparable wear.
Interior wall insulation coating interior wall insulation coating is a new type of insulation material. It is composed of high-quality natural mineral magnesium silicate. It is added with chemical additives and high-temperature adhesive. After pulping, molding, shaping, drying, finished products, packaging, etc. The process is made of a closed microporous structure and an alkali-resistant glass fiber mesh structure, which can be used for a long time in the temperature range of use, is not easy to aging, does not deteriorate, is non-toxic and tasteless, and has long-term heat preservation performance.
The construction method of interior wall insulation coating is almost the same as that of general wall coating construction. Add appropriate amount of water and stir it into a paste and apply it directly to the treated wall. After two times of application, it will be calendered. After completely drying, it will be glued and glued to the glass mesh belt. After that, it can be used for wall work such as putty. .
Advantages——1. Light weight, small thermal conductivity, cold insulation, shock absorption and sound absorption; 2. Optional cutting, depending on the type, no pollution to the environment, no skin irritation; 3. No loss of construction, using mode Plastic molding, low bulk density, cost-effective; 4, no volatiles, no VOC, non-toxic and harmless, green paint.
Disadvantages - 1, can not eliminate the heat bridge. The internal thermal insulation can not block the thermal bridge formed by the beam, the cross wall and the column in the wall, so it is impossible to prevent the heat loss caused by the existence of the thermal bridge, and the thermal insulation performance is poor. Due to the difficulty in thermal insulation treatment, condensation and condensation are prone to occur. The impregnation or freezing and thawing of dew condensation water can easily cause mildew and cracking of the thermal insulation wall, deform the wall, affect durability and comfort; 2. It is prone to cracks. Due to day and night and seasonal changes, the external walls are subject to expansion and contraction due to outdoor air temperature and solar radiation, while the interior walls are largely unaffected by this effect. When the temperature difference between indoor and outdoor is too large, the internal and external walls will undergo shrinkage changes. This repeated change causes the wall to be in an unstable state and is prone to cracks.
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Label: Comparison of the advantages and disadvantages of interior wall insulation materials during cold weather
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