Broken Bridge aluminum doors and windows heat insulation strip is an important part of energy saving and heat insulation of doors and windows, which can be said to be the top priority of broken bridge aluminum doors and windows. It not only affects the quality of profile composite, but also affects the watertightness, air tightness, wind pressure resistance has essential influence. It plays a vital role in the advantages and disadvantages of broken bridge aluminum doors and windows!
There are PVC strip PA66 nylon strips in the insulation strip material. PA66 nylon strips are used for the excellent broken bridge aluminum doors and windows, while PVC insulation strips are used for the inferior Broken Bridge aluminum doors and windows! If the quotation is calculated by one square meter, nylon insulation strip is more than ten yuan more expensive than pvc insulation strip. Nylon strip can not only play the role of heat insulation, heat preservation and noise insulation, but also is high temperature resistant and flame retardant. Using nylon heat insulation strip can also avoid the gap between the heat insulation strip and the metal caused by thermal expansion and cold contraction, on the contrary, PVC insulation strip will produce gaps between insulation strip and finance due to thermal expansion and contraction, thus failing to achieve the effect of thermal insulation. Although such broken bridge aluminum doors and windows is cheap, however, compared with the high-quality Broken Bridge aluminum doors and windows, the effects of sound insulation, heat insulation and heat preservation are far worse.
At present, some consumers do not know much about broken bridge aluminum doors and windows. When purchasing broken bridge aluminum doors and windows, they only covet cheap prices, while manufacturers often use PVC insulation strips to replace nylon insulation strips in order to make huge profits. Therefore, consumers must polish their eyes when purchasing broken bridge aluminum doors and windows.
However, some low-cost broken bridge aluminum doors and windows in the market often use PVC insulation strips instead of PA66 nylon strips in order to reduce the production cost of doors and windows. As consumers, how can we distinguish whether the broken bridge aluminum doors and windows insulation strips are PA66 nylon strips or PVC strip?
It is also a black heat insulation strip. It is difficult for consumers to distinguish whether the heat insulation strip is PA66 nylon strip or PVC strip. Here are the following:
1. Look at the gloss, observe carefully, and watch the Heat insulation strip from different angles. PVC heat insulation strip is particularly bright, and some PVC heat insulation strips have sculptural feel. PA66 nylon heat insulation strip is an advanced cold extrusion technology, the surface is flat and smooth, and the color is black, with wheel marks pressed by synchronous gears at both ends; PVC strip it looks irregular on the surface, smooth, and the color is gray and black. Broken Bridge aluminum the surface of the nylon strip PA66 of the window is a matte texture, the color is black; However, PVC strip looks very plain, smooth, and the color is white. The comparison between the two can be clearly distinguished. Let's take a look through two photos.
2. Look at the burning degree and fire. PA66 nylon strips are combustible. You can light them with a lighter. The flame is a little light blue. If it is not blown out, it will burn all the time. After the burning goes out, nylon is the one with the smell of protein burning.; The PVC insulation strip can also be lit with a lighter, but it will be extinguished after leaving the fire source. And there will be a smell of plastic, and PVC is the one with pungent smell.
3. Break the heat insulation strip by hand. PA66 nylon strip can be broken by hand, while PVC heat insulation strip is particularly soft and needs to be broken after repeated for more than ten times, which is not easy to break, when the PA66 nylon insulation strip is broken, the sound is very crisp, while PVC strip will turn white after being broken several times, and there is no sound and it has been deformed.
PA66 nylon strip and PVC insulation strip can probably be distinguished from the following.
Observation surface: unqualified insulation strip: floating fiber on the surface, not smooth; Enough insulation strip: bright surface, color uniformity, no white spots.
Accurate size: the size of the sufficient insulation strip is accurate and the appearance is beautiful; The outline size of the unqualified insulation strip is inaccurate.
Density measurement: the internal structure of the excellent heat insulation strip is dense with a density of 1.30±0.05. Unqualified broken bridge aluminum heat insulation strip: the internal structure is loose, the content of glass fiber is small, even there is no glass fiber, and it contains a large number of pores, and the depth affects the strength of the heat insulation strip; Careless heat insulation strip: the internal structure is tight, and there is no pores, glass fiber is irregularly arranged and evenly distributed.
Transverse tensile: Test strength generally speaking, all major profile factories have such simple machines and fixtures to carry out this test. Take A sample of 35mm and perform the process operation according to Appendix A of the national standard "auxiliary material for aluminum alloy building profiles-polyamide insulation strip. Transverse tensile characteristic value is the specific value of heat insulation bar strength. High quality Broken Bridge aluminum heat insulation strip transverse tensile characteristic value ≥ 70MPa.
But if you really want to ask broken bridge aluminum doors and windows is it enough to wear PVC strip? The answer is barely qualified, but the quality is not good.
