General aluminum alloy doors and windows have a service life of about 30 years, but if special properties are added, the service life can be longer. Aluminum-coated plastic doors and windows are characteristic doors and windows. Aluminum-coated plastic doors and windows are made of UPVC resin as the main raw material, aluminum plate is buckled on the outer side, and steel lining is fixed on UPVC through screw connection, and are matched with multiple sealant strips and hardware components, with high technical standards, after repeated tests and verification, it becomes a system door and window with high energy saving. Simply understand, aluminum-coated plastic doors and windows are improved on the basis of plastic steel windows. On the basis of UPVC on the internal facade, aluminum plates with external buckle are adopted. The improved aluminum-coated plastic doors and windows have also stood firm in the market with their own advantages.
The initial thermal insulation performance is better: the thermal conductivity of plastic is low, only 1/357 of steel and 1/250 of aluminum, which makes aluminum-coated plastic doors and windows have great advantages in thermal insulation performance, at the same time, the installation of double-layer glass or Triplex glass and multi-cavity profile structure also further improves the thermal insulation performance. With the corresponding sealing technology, aluminum-coated plastic doors and windows have excellent heat insulation performance. Of course, the thermal insulation performance comes from the characteristics of the plastic structure itself, which is determined by the natural non-thermal conductor rather than the profile structure itself. The initial effect is not insignificant, but what changes will happen after 3-5 years of use, the editor will also analyze with you next.
The steel property of aluminum-coated plastic main part material UPVC resin is insufficient. Although aluminum plate is used externally and steel lining is added internally, the hardness of the profile has been greatly improved, but the fact that its steel property of main part material UPVC resin is insufficient cannot be ignored, even some unscrupulous manufacturers reduce the usage by steel lining in order to reduce costs, resulting in insufficient wind pressure resistance of the whole window. And the splicing angle is welded by plastic, resulting in the angular strength not exceeding 50KN, resulting in 45 ° splicing angle easily causing dislocation, affecting the structural strength of the whole window, at the same time, there are congenital deficiencies in the installation firmness of hardware accessories. Because the hardness is not high, it is easy to pull explosion, fracture and fault in the process of production and installation, so the production cost is very high, and gravity impact Pat occurs during installation or transportation, the internal plastic structure will be broken, the structure is misaligned and the structure is unstable, so there is no problem of sound insulation and heat insulation at all.
Effectively restrain the structural resonance and coincidence effect, theoretically the sound conductivity of plastic is lower than that of aluminum alloy profile. However, it is easy for people to ignore many problems of performance decline caused by aging of plastic profiles. When plastic profiles are in relatively bad weather environment for a long time, deformation, brittleness and unstable size are easy to occur, while the outer side buckle aluminum plate is not easy to distinguish the changes of the internal structure, and the sealing effect will become worse for a long time, which will lead to the deterioration of the sound insulation effect, at the same time, the aging phenomenon of internal plastic profiles will also increase the risk of further decline of wind pressure resistance.
The facade adopts aluminum profiles, which are powder sprayed or fluorocarbon sprayed and have strong weather resistance. Although some UV and infrared rays are shielded from the radiation of plastic profiles, the hidden danger of aging of plastic profiles cannot be solved. Plastic profiles themselves are easily deformed, cold and brittle, poor dimensional stability, and toxic gases will be emitted when plastic profiles are burning. Due to the characteristics of plastic profiles, the service life of aluminum-coated plastic doors and windows is greatly reduced.
If the service life is not long, once installed, the recycling value is low, and main part material UPVC resin cannot be degraded, which causes great problems to environmental protection. If the black commercial waste PVC furnace is recast, the damage is N times larger than that of aluminum alloy waste. Once it enters the market, the situation is unimaginable.
Aluminum-coated plastic doors and windows are widely loved by consumers because of their excellent thermal insulation and energy saving performance. However, due to the short development time, there are still some shortcomings. Aluminum alloy doors and windows are still the mainstream in the door and window market. Aluminum alloy doors and windows have gone through 30 years from no one cares about them to becoming mainstream products in the door and window market. In these 30 years, a generation of doors and windows have been working hard at night, overcoming one technical problem after another, only then has the current market position of aluminum alloy doors and windows been achieved.
It can be seen that the service life of aluminum-coated plastic doors and windows still cannot reach the 30-year service life level of ordinary aluminum alloy doors and windows. Maybe this is just the doors and windows enterprises want to find some new innovation points to make selling points.
