[China Aluminum Network] the role of insulation: Led Integrated Emergency Device Led Lamp Automatic Emergency Device,Led Automatic Emergency Device,Led Emergency Device,Led Light Emergency Device,Emergency Driver For Led Lights Foshan Nai An Lighting Electric Co.,ltd , https://www.ledpowerpack.com
Simply speaking, the heat-insulating aluminum alloy divides the original one-piece profile into two on the basis of the traditional aluminum alloy, and then the two heat-insulating bars are connected together by means of mechanical recombination. The use properties of the heat-insulation bar determine that it must have high strength and low conductivity at the same time. Otherwise, there is a significant quality risk in the heat-insulating aluminum alloy doors, windows and curtain walls. (Insufficient strength will cause the heat-insulating aluminum profile to be insulated from the heat-insulating bar. If the connection is broken, the thermal insulation effect is lost (high thermal conductivity can not guarantee the thermal insulation effect), so the material selection and manufacturing process of the thermal insulation strip are critical.
Thermal insulation type:
At present, there are two main types of heat insulation strips used on broken aluminum doors and windows on the market. One is PA66GF25 insulation strip, and the other is insulation strip of PVC material.
1. PA66GF25 Insulation Bar: PA66 is a series of modified engineering plastic alloys with high melting point, excellent heat resistance and self-extinguishing properties. However, the unmodified PA66 material does not match the aluminum alloy in terms of tensile strength and coefficient of linear expansion. Through experimentation, 25% of the glass fiber in PA66 is modified into engineering plastics as the basic material of the thermal insulation strip. It is better. At present, there are no new materials that are more reasonable and economical than this.
2, PVC insulation strip: The main raw material for PVC resin powder plus 25% of calcium carbonate.
The difference between the two:
1: Tensile strength PA66GF25 thermal insulation strip> 126N/mmPVC thermal insulation strip, about 70N/mm;
2: Heat distortion temperature: PA66GF25 insulation strip, 240 degree PVC insulation strip, 90 degrees;
3: aging resistance: PA66GF25 insulation strip, durable, not easy to aging PVC insulation strip, easy to aging;
4: expansion coefficient: PA66GF25 thermal insulation strip, consistent with the linear expansion coefficient of aluminum alloy PVC insulation strip, and the aluminum alloy linear expansion coefficient difference.
How to identify:
1, to see the gloss, broken bridge aluminum window PA66GF25 insulation strip surface is a matte texture, color anti-black; but PVC insulation strip looks very smooth, smooth, color anti-white. The difference between the two can be clearly distinguished.
2. Another point is that the PA66GF25 insulation strip is non-flammable. The PVC insulation strip will ignite for a while to see a small flame, and there will be a general plastic smell.
3, PA66GF25 insulation strip break off once or twice, while the PVC insulation strip needs to be broken more than ten times before breaking.
4. When the PA66GF25 insulation strip breaks, the sound will be crisp, and the fracture will not be deformed after being fractured. It can be docked and restored. After the PVC insulation strip breaks off, it is whitish and deformed.
to sum up:
When buying broken bridge doors and windows, in addition to paying attention to the wall thickness of the door and window profiles, glass, hardware accessories and technology, we must also pay attention to distinguish the material of the heat insulation strip. If you use inferior heat insulation strips, no matter what your other configuration How good is it, the service life will be greatly reduced. It's as if you have spent 1 million luxury cars and have everything you need, but you've got an engine for a tractor. Do you think your luxury car still makes sense?