Abstract: Plastic steel doors and windows are made of polyvinyl chloride resin as the main raw material, plus a certain proportion of stabilizers, colorants, fillers, ultraviolet absorbers, etc., extruded into shapes, and then made by cutting, welding or screwing. Become a door and window frame fan. Plastic-steel windows are a form of windows that were actively promoted by the state in the mid-1990s after wood, iron, and aluminum alloy windows. Because of its low price and relatively good performance and price, it is still widely used. How about the price of plastic steel doors and windows? What factors will affect the price of plastic steel doors and windows? Let's find out together.
The market price of plastic steel doors and windows is estimated according to the price of various market materials. Sliding windows are generally 110 yuan for profiles, 8 yuan for hardware, 10 yuan for accessories, 30 yuan for production and installation, 20 yuan for reinforced steel, and 30 yuan. The transportation of 4 yuan for high-quality glass is generally 212 yuan per square meter. For 80 sliding windows and 105 profiles, the rest are the same, it is estimated to be 207 yuan per square meter; for 60 casement windows, it is 150 yuan for profiles and 28 yuan for hardware , the rest of the price is the same as above, it is estimated that the price per square meter of plastic steel doors and windows is 272, all the prices are justified, the most important thing about the price is the configuration.
1. Profiles are the key to widening the price gap
According to relevant sources, the main material of plastic-steel doors and windows is a specially formulated rigid PVC polyvinyl chloride profile. The person in charge of product research and development of Renyuan Doors and Windows said: "Although they are all the same PVC, they are different in the manufacturing process such as resins and additives. These cannot be seen from the outside. Because of their differences, they will directly It affects the anti-ultraviolet and anti-aging ability of the profile, as well as the strength of the profile. In addition, the structure of the profile will directly affect the price and quality of doors and windows. From the section structure of plastic steel doors and windows, we can see the impact resistance and pressure resistance of the profile. The interior of the building should generally be lined with steel linings to strengthen the strength of doors and windows."
According to market sales personnel, the steel linings of plastic-steel doors and windows vary greatly. The higher-grade steel linings are made of galvanized steel with a thickness of about 2.5MM, while the plastic-steel windows produced by some small-scale manufacturers only use steel coated with anti-rust paint. , the thickness is relatively thinner, about 1.5M, and the corners of the window frame will cut corners to save the steel lining, which cannot be seen on the outside, but affects the use.
2. Different processing techniques will affect the quality of plastic steel doors and windows
Although doors and windows are mainly airtight, the most prone to leaks are the angles of doors and windows, especially doors. If the welding is not good, cracking and breaking will occur after bearing a certain strength and pressure. The person in charge of China Construction said so. Therefore, when purchasing plastic steel doors and windows, it is necessary to pay attention to whether the inclination angle of the doors and windows is welded by hand. If it is welded by hand, the heat preservation and pressure resistance of the doors and windows will not reach the higher standard.
3. Hardware and other accessories have also been upgraded
Due to the different opening methods of plastic steel doors and windows, their hardware accessories are also different. Different opening methods also make the sealing of doors and windows very different, and their prices are also different. Generally speaking, if hardware accessories are selected from imported brands, their price and quality will be relatively high. Of course, some small manufacturers with slightly inferior brands may reduce hardware accessories in order to save costs, such as using double-sided locking hardware, he may change to a single set of accessories and so on. In addition, other accessories such as glass, sealing strips, etc. will also affect the quality of plastic steel. The rubber strip is plastic-steel thermal insulation and sealing coating. Products from professional manufacturers have high aging resistance, corrosion resistance and strength, while some inferior products cannot withstand high temperature and ultraviolet radiation, and are prone to discoloration and aging.
4. Choose a reliable brand with guaranteed quality
Some decoration companies believe that the quality of plastic-steel doors and windows is directly proportional to the price. Some small manufacturers purchase inferior products in order to save costs. Although they cannot be seen on the surface, quality problems will occur after a period of use. In addition, the after-sales service of small manufacturers is not in place, and maintenance personnel cannot be found. And a large reputable manufacturer not only has reliable suppliers, effective imported equipment, but also relatively complete after-sales service and credit guarantee, which is worth considering.
The main raw material of plastic-steel doors and windows is polyethylene resin, and titanium dioxide, ultraviolet absorbers, processing modifiers, impact modifiers, internal and external lubricants and fillers need to be added before molding. Since the basic composition of the profile is polyvinyl chloride resin, it has some characteristics:
1. Strong machinability
In the molten state, plastic has relatively high fluidity, so the precise cross-sectional structure can be formed through the mold, so as to realize the functional requirements that the window should have. Moreover, a divided chamber can be formed to improve the thermal insulation, sound insulation, and drainage functions of the window, and can avoid the corrosion of the reinforced steel.
2. Energy saving
Compared with other doors and windows, plastic doors and windows have more superior technical characteristics in terms of energy saving and improvement of indoor thermal environment. According to the test by the Institute of Physics of the Construction Research Institute, the heat transfer coefficient of single-glass steel and aluminum windows is 64W/M2K; the heat transfer coefficient of single-glass plastic-steel windows is about 47W/M2K; the heat transfer coefficient of ordinary double-glazed steel and aluminum windows It is about 3.7W/M2K; while the heat transfer coefficient of double-glass plastic steel windows is about 2.5W/M2K. Doors and windows account for 30% of the area of the building's outer enclosure structure, and its heat dissipation accounts for 49%. It can be seen that plastic-steel windows have good energy-saving benefits.
3. Good sound insulation
The sound insulation performance of steel and aluminum windows is about 19 decibels, and the sound insulation performance of plastic steel windows can reach more than 30 decibels. In the increasingly noisy urban environment, the use of plastic steel windows can make the indoor environment more comfortable. According to the information provided by Japan, in order to meet the same noise reduction requirements, the distance between the building with aluminum windows and the main traffic road must be 50 meters, and the distance between the buildings with plastic-steel windows must be 18 meters. According to the test of the Beijing Labor Protection Research Institute, the indoor noise of plastic-steel windows is reduced to 32DB (A), and the effect is very good. Due to economic development, urban noise problems are becoming more and more serious, and plastic-steel windows will make a greater contribution to improving the quality of the sound environment for people to live and work. In addition, plastic-steel windows are corrosion-resistant and can be used in corrosive environments such as coastal areas and chemical plants. The use of ordinary users can also reduce the labor and cost of maintaining paint.
4. Good appearance
It can adapt to the domestic decorative effect requirements, and the human body contact feeling is more comfortable than metal. Because plastic steel doors and windows have some of the above outstanding advantages, they are being widely used in our country and become a new trend in the construction field.
Now, under normal circumstances, solid wood windows and ordinary aluminum alloy windows with broken bridges are not used; plastic-steel windows are the most used materials, and the price of plastic-steel windows is generally between 150--600 yuan/square meter, which is acceptable to most people. Cost-effectiveness is the main factor for its popularity.