The main raw material of PVC window and door profiles is polyethylene resin. Before forming, titanium dioxide, ultraviolet absorber, processing modifier, impact modifier, internal and external lubricants, and fillers need to be added. Since the basic composition of the profiles is polyvinyl chloride resin, it has the following characteristics: Energy saving + Environmental protection - the four major advantages of PVC windows and doors.
1. High processability
In a molten state, plastics have relatively high fluidity, so precise cross-sectional structures can be formed through molds, thereby achieving the functional needs that windows should possess. Moreover, separate chambers can be formed to improve the thermal insulation, sound insulation, and drainage functions of the windows, avoiding rusting of the reinforcing steel.
2. Energy saving
Plastic windows and doors are superior in energy saving and improving indoor thermal environment compared to other types of windows and doors. According to tests by the Physical Institute of the China Academy of Building Research, the heat transfer coefficient of single-glazed steel and aluminum windows is 64W/M2K; the heat transfer coefficient of single-glazed PVC windows is about 47W/M2K; the heat transfer coefficient of ordinary double-glazed steel and aluminum windows is about 3.7W/M2K; while the heat transfer coefficient of double-glazed plastic steel windows is approximately 2.5W/M2K. Windows and doors account for 30% of the building's outer protective structure area, and their heat dissipation accounts for 49%. It can be seen from this that PVC windows have excellent energy-saving benefits.
3. Good sound insulation
The sound insulation performance of steel and aluminum windows is about 19 decibels, while the sound insulation performance of PVC windows can reach above 30 decibels. In the increasingly noisy urban environment, using PVC windows can make the indoor environment more comfortable. According to data provided by Japan, to achieve the same noise reduction requirements, buildings with aluminum windows must be 50 meters away from traffic arteries, while buildings with PVC windows only need to be 18 meters away. According to tests by the Beijing Labor Protection Research Institute, the indoor noise level with PVC windows is reduced to 32DB(A), which is very effective. With the development of the economy, urban noise problems are becoming increasingly serious, and PVC windows will make significant contributions to improving the quality of people's living and working sound environments. Additionally, PVC windows are corrosion-resistant and can be used in coastal areas and chemical plants and other corrosive environments. Ordinary users can also reduce the labor and cost of maintenance painting.
4. Good appearance
It can meet the domestic decoration effect requirements, and the tactile sensation when in contact with the human body is more comfortable than metal. Due to the outstanding advantages mentioned above, PVC windows and doors are getting extensive applications in our country and have become a new trend in the construction field. Nowadays, solid wood windows and ordinary broken-bridge aluminum alloy windows are generally not selected under normal circumstances; the most widely used material belongs to PVC windows. The price of PVC windows is generally between 150-600 yuan per square meter, which most people can afford. The cost-performance ratio of PVC windows is the main factor contributing to their popularity.
However, the quality of PVC window and door products has been increasing due to inferior materials being passed off as good ones, and rough installation, leading to a continuous increase in the number of PVC window and door quality issues. Currently, low-quality windows assembled arbitrarily impersonate profile brands, resulting in large price gaps, excessive water content, and non-standard installation problems within the same brand. How should consumers choose PVC window and door products and services?