What is a good door and window?
From GB5237-2008 to GB/T8478-2020, the national standards for aluminum alloy doors and windows are constantly improving.
Online many people talk about distinguishing aluminum profiles, choose vrigin aluminum do not recycled aluminum, in fact, this refers to aluminum profiles used in the alloy grade, different alloy grades in the composition of different applications, the use of different applications. Building aluminum alloy is usually 6063, 6061 and T5, T6 for the heat treatment process. As long as it is a large factory, basically according to the national standard to use the alloy aluminum bar.
The big factory also has a good point that the surface treatment of aluminum profiles is more abundant. We don't mean rich color, but more surface treatment process, such as anodized, electrophoretic coating, powder coating, fluorocarbon, etc. Among them, electrophoretic coating is not easy to do well, and the color difference is obvious in different batches, and the fluorocarbon is used for the longest time and the cost is high. So our common doors and windows are basically powder coating.
In powder coating, how to choose, one is the powder used, the mature brand of powder fading cycle is slow. The second is the process used in spraying, a good spray line to make a fine surface, powder adhesion is good, no bubbles in the use of doors and windows, will not fall off.
Aluminum alloy door and window profiles there is something called heat insulation strip its role is to form a cold bridge between the indoor and outdoor door and window profiles, used to isolate the transfer of indoor and outdoor temperatures so as to acheive the role of heat insulation and heat preservation.
Online there are people talking about ordinary windows with PVC good with PA66.
The way of heat insulation is divided into strips of heat insulation and injection type heat insulation.
PA66 that thermal bar its full name is PA66GF25 refers to 66% nylon plus 25% glass fiber, this is marked on the outside of each thermal bar. The cost of high-quality thermal bar than the aluminum profile to be several times more expensive, so as long as the use of imported brands of thermal bar windows are basically not cheap, in addition, the width of the thermal bar determines the thermal performance, and divided into I-type bar CT-type bar and K-type, so the multi-chambered than the one-type thermal bar windows and doors of a lot more expensive.
To sum up, aluminum profiles do not have to consider whether it is virgin aluminum or recycled aluminum, as long as it is a large factory are no problem. Color, with powder coating can be, can choose more colors, preferably with better quality powder. Pay more attention to the heat insulating strips, especially for those who care about performance.
