Insulated aluminum alloy is to divide the original one-piece profile into two parts on the basis of traditional aluminum alloy, and then connect the separated two parts together by means of mechanical recombination.
I. Function of heat insulation strip
simply put, insulated aluminum alloy divides the original one-piece profile into two parts on the basis of traditional aluminum alloy, and then connects the separated two parts together by means of mechanical recombination. This kind of use property of heat insulation strip determines that it must have high strength and low conductivity at the same time, otherwise it will either cause heat insulation aluminum alloy doors and windows, there is a major quality hidden danger in the curtain wall (insufficient strength will cause the heat-insulating aluminum profile to break from the connection of the heat-insulating strip), or the heat-insulating significance will be lost (if the conduction rate is high, the heat-insulating effect cannot be guaranteed), therefore, the material selection and manufacturing process of heat insulation strip are very critical.
II. Types of insulation strips
currently on the market
broken bridge aluminum doors and windows there are two main types of insulation strips used, one is PA66GF25 insulation strips, and the other is PVC insulation strips.
1. PA66GF25 heat insulation strip: PA66 is a series of modified engineering plastic alloy, which has high melting point, excellent heat resistance and self-extinguishing. However, the unmodified PA66 material does not match the aluminum alloy in tensile strength and linear expansion coeffcient. Through experiments, 25% glass fiber is added to PA66 to modify it into engineering plastic as the basic material of heat insulation strip, it is the best. At present, no more reasonable and economical new insulation strip materials have been found in the world. Nidia doors and windows are all made of PA66GF25 insulation strip, and the model can be directly seen in the appearance of the product.
2. PVC insulation strip: the main raw material is PVC resin sand plus 25% calcium carbonate
the difference between the two:
1: Tensile strength
PA66GF25 heat insulation strip> 126N/mm
PVC insulation strip about 70N/mm
2: Thermal Deformation temperature:
PA66GF25 insulation strip 240 degrees
PVC insulation strip 90 degrees
3: aging resistance:
PA66GF25 heat insulation strip is durable and not easy to age
PVC insulation strip is easy to age
4: expansion coefficient:
PA66GF25 insulation strip is consistent with aluminum alloy linear expansion coeffcient
PVC insulation strip is very different from aluminum alloy linear expansion coeffcient
III. How to identify
1. Looking at the gloss, the surface of the Broken Bridge aluminum heat insulation strip of the PA66GF25 window is a matte texture, and the color is anti-black; But the PVC heat insulation strip looks very smooth, smooth, and the color is anti-white. The comparison between the two can be clearly distinguished.
2. Another point is that PA66GF25 insulation strip does not burn. PVC insulation strip will burn and see small flames after lighting for a while, and there will be a general smell of plastic.
3. PA66GF25 heat insulation strip will break once or twice, while PVC heat insulation strip will break only after being folded more than ten times.
4. PA66GF25 the sound is crisp when the heat insulation strip is broken. After the break, the fracture is neat and not deformed, which can be connected and restored. After the PVC insulation strip is broken, the fracture is white and deformed.
IV. Summary
when buying broken bridge doors and windows, in addition to paying attention to the wall thickness of door & window profile, glass, hardware accessories and technology, we must pay attention to distinguish the material of heat insulation strip. If inferior heat insulation strip is used, no matter how good your other configurations are, the service life will be greatly reduced. It's like a luxury car bought for 1 million yuan, which has all the configurations, but it gives you a tractor engine. Do you think your luxury car is meaningful?
