Date: February 1, 2019
WHY ARE
UPVC DOORS AND WINDOWS ?
As we all know, plastic doors and windows are more and more popular because of their beautiful appearance, strong corrosion resistance, good water tightness and heat insulation, and easy maintenance. They are recognized as the best energy-saving doors and windows in the world.
Plastic doors and windows, commonly known as UPVC doors and windows, are made of polyvinyl chloride (PVC) resin with more than 10 additives, and are extruded into rods (profiles) through an extruder and die; the rods are cut, loaded into reinforced steel, and screwed. The doors and windows are assembled into a frame and then equipped with sealing strips, hardware, accessories and glass.
Why are plastic steel doors and windows recognized as the best energy-saving doors and windows? According to authoritative data, the energy saving of plastic doors and windows is mainly reflected in three aspects:
1. Energy saving in the production process.
It is reported that the energy consumption of producing PVC profiles of the same weight is 1/4 of steel and 1/8 of aluminum.
2. Energy saving by recycling.
For a long time, people have only one-sidedly believed that metal doors and windows can be recycled and reused. As everyone knows, the recycling of plastic doors and windows is more energy-efficient and environmentally friendly. Because plastic doors and windows do not need to go through smelting, ingot casting, rolling and other processes like recycling metal doors and windows, they only need to crush waste materials or mix them with new materials to extrude profiles. The recycled materials can be used to make flooring, park benches and other products.
3. Plastic doors and windows have good thermal insulation properties and are affordable.
The heat transfer coefficient of metal is relatively high. To achieve the limit value of heat transfer coefficient of external windows required by relevant standards, it is necessary to add a broken bridge. This process alone will greatly increase the cost of aluminum doors and windows. The unique material of plastic doors and windows makes it have excellent heat insulation. When the heat transfer coefficient of the outer window is limited to 2.0W/㎡·K, the price ratio of plastic windows and aluminum windows is 1:1.8.
