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Material analysis of heat insulation strips for doors and windows |
yx1991
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Posts: 150
Location: shanghao
Joined: 09.04.15 |
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superhouse
In short, the thermal insulation aluminum alloy divides the original single-piece contour into two according to the traditional aluminum alloy, and then separates the two parts together by mechanical composite means through two thermal insulation strips.
Aluminum doors & windows
Types of heat insulation strips:
At present, there are two types of heat insulation strips used in system doors and windows on the market, one is PA66GF25 heat insulation strip, and the other is PVC heat insulation strip.
1. PA66GF25 heat insulation strip: PA66 is a series of modified engineering plastic alloys. It has a 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 linear expansion coefficient. Through experiments, adding 25% glass fiber to PA66 is modified into engineering plastic as the basic material of the heat insulation strip. It is better. At present, there is no new material for insulation strip that is more reasonable and economical than this one.
2. Polyvinyl chloride insulation strip: The main raw materials are polyvinyl chloride resin powder and 25% calcium carbonate.
The difference between the two:
1: Tensile strength PA66GF25 insulation strip> 126 n/mm PVC insulation strip, about 70N/mm;
2: Heat distortion temperature: pa66gf25 insulation strip, 240 degrees PVC insulation strip, 90 degrees;
3: Anti-aging: PA66GF25 insulation tape, durable, not easy to aging PVC insulation, easy to aging:
4: Expansion coefficient: PA66GF25 insulation strip, consistent with the linear expansion coefficient of aluminum alloy PVC insulation strip, and the linear expansion coefficient of aluminum alloy is very different.
How to identify:
1. From the perspective of gloss, the pa66gf25 surface of the broken bridge aluminum window has a frosted texture, and the color is reversed from black; but the pvc strip looks smooth and shiny, and the color is reversed from white. When they are put together, they can be clearly distinguished.
2. Is there any problem that PA66GF25 heat insulation strips do not burn, PVC heat insulation strips will burn after a while, and small flames can be seen, and they will have a general smell of plastic.
3. The PA66GF25 insulation strip is broken once or twice, and the PVC insulation strip needs to be folded more than ten times before it can be broken.
4. When the PA66GF25 insulation strip is broken, the sound is clear, the surface of the fracture is neat and not deformed after the break, and it can be repaired by butt joints.
Summarize:
When buying broken bridge doors and windows, in addition to paying attention to the wall thickness of the door and window profiles, glass, hardware product accessories and craftsmanship, you also need to pay attention to distinguishing the materials of the heat insulation strips for a certain period of time. If some inferior heat insulation strips are used, No matter how good your other configuration is, the life of the network will be greatly reduced.
Recommend more:Quality mould suppliers
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