The hottest plastic door and window industry may h

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The plastic door and window industry may have a grand plan in the field of Building Energy Conservation Guide: according to experts, the thermal conductivity of plastic doors and windows is only 1/360 of steel and 1/250 of aluminum, with good thermal insulation performance. At the same time, plastic door and window profiles are of multi chamber structure (one is the five chamber or even six chamber structure has been developed in Lajie area). It consists of a closed air insulation layer composed of multiple independent spaces, which makes full use of the heat insulation performance of air to further reduce the overall heat conductivity of its materials

experiments show that the heat transfer coefficient K of plastic door and window double glass windows can reach below 3.0w/m2 · K, which can meet the requirements of most energy-saving buildings in hot summer and cold winter areas, hot summer and warm winter areas and severe cold areas. The K value of ordinary aluminum alloy windows, even Low-E insulating glass, can only reach 3.5~3.0w/m2 · K. It can be seen that in order to meet the same K value requirements, plastic doors and windows can choose more economical supporting glass, so as to reduce the construction cost of doors and windows

according to experts, plastic door and window frames or sashes are welded by melting. The window frames and sashes are an integral whole, and there is no gap between the horizontal and vertical materials, eliminating the possibility of air passing through the corner of the horizontal and vertical materials

plastic doors and windows have high processing size and precision, and the frame and leaf overlap design is exquisite. During assembly, all gaps are equipped with sealant strips or sealing wool strips. Only replace the sensor glass. The glass is embedded in the groove formed by the combination of the pressure strip and the window sash, and both sides are sealed with elastic rubber. The sliding window sash is buckled on the sliding window frame track, and the sash and frame are sealed by wool strips. The sliding fans are also sealed by two wool strips. The casement window frame and sash are sealed by adhesive strips. In addition, when installing plastic doors and windows, flexible support is required between the wall and the window frame, which is sealed with Styrofoam. At the same time, air pressure balancing holes and drainage holes are opened at the corresponding parts of the window frame and sash to further improve the air tightness of the finished window

experiments have proved that as long as the plastic doors and windows are manufactured and installed in strict accordance with the specifications, the air tightness of the sliding windows can meet the relevant energy-saving standards. That is, bonding strength - the stress required to separate two metal blocks bonded with adhesive (tensile force divided by bonding area) makes it a sliding window with more general performance, and its air tightness can also meet the requirements of "design standard for energy efficiency of residential buildings in hot summer and warm winter areas" and "design standard for energy efficiency of residential buildings in hot summer and cold winter areas"

the heat from solar radiation has a great impact on building energy consumption. The heat from solar radiation increases the cooling load in summer and reduces the heating load in winter. Therefore, in different regions and seasons, energy-saving buildings have different shading requirements for doors and windows and their surrounding shading products

there are many kinds of plastic doors and windows, and the supporting materials that make up their windows can be flexibly selected. According to different needs, different glasses and various shading products can be matched to meet the requirements of energy-saving buildings for shading coefficient

at present, there are many kinds of sunshade products at home and abroad, including external sunshade sunshade, internal curtain sunshade, hollow glass built-in 100 page sunshade, etc. Plastic doors and windows can be perfectly matched with the built-in sun shading insulating glass, with coordinated color. Equipped with plastic doors and windows with built-in sun shading insulating glass, it can achieve the effect of indoor natural lighting or complete sun shading through adjustment

in addition, in terms of energy consumption in raw material production, the energy consumption per unit weight of PVC is 1/5 that of steel and 1/8 that of aluminum. In terms of recycling, the recycling energy consumption of plastic profiles is also far lower than that of metal materials such as aluminum alloy. After the old material of plastic profile is crushed, new material can be added and re extruded into auxiliary materials, or pipes and other extruded products can be made; After aluminum alloy and other metal products are recycled, they must undergo high-temperature melting, and then carry out multiple processes such as composition adjustment and ingot processing to make products. It can be seen that plastic doors and windows, such as PC, peek and other high-performance modified plastics, are significantly used in electronic appliances and have obvious advantages in the field of energy-saving buildings. If 2billion square meters of new houses are built every year, roughly calculated according to the area of doors and windows accounting for 1/7 of the construction area, about 300million square meters of new doors and windows will be added every year

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