Adhesive-injected insulation systems provide the world's best thermal insulation and building structural performance.
At present, there are two main forms of heat-insulating aluminum profiles: strip-type heat-insulating aluminum profiles and glue-injected heat-insulating aluminum profiles .
Glue-injected heat-insulating aluminum profile technology originated in the United States and has been widely used in the international energy-saving doors and windows market. The polymer material with excellent thermal insulation properties is poured into the slot of the aluminum alloy profile, and then the bridge is broken to form a thermal insulation layer (often called a thermal insulation bridge) in the center of the profile, thereby achieving a good thermal insulation effect. The heat-insulated aluminum profiles produced by this process have high overall strength, good heat insulation effect, no siphon phenomenon, small cross-sectional area, beautiful appearance and exquisite appearance, and are especially suitable for use in residential building doors and windows and high-rise building doors and windows.
The following is a comparative analysis of the performance of glue-injected and strip-type heat-insulating aluminum profiles:
1. Basic performance comparison
1. Strength
Glubber-injected heat-insulating aluminum profiles, because the aluminum profiles adopt a one-time extrusion process, this not only reduces the number of molds, but also effectively avoids problems such as process defects. The hardness of the aluminum profile is allowed to reach a clamp hardness of 13 or above, while the hardness of the aluminum profile for the threading process is allowed to be around a clamp hardness of 10. The glue-injected heat-insulating aluminum profile is a one-time pouring glue into the heat insulation groove of the aluminum profile to solidify to form a heat insulation bridge. Due to the high adhesion of the casting glue, the heat insulation bridge and the aluminum profile are completely bonded into one, so this The heat-insulating aluminum profiles of the process are high in strength.
The strip-type heat-insulating aluminum profile itself is formed by two extrusions, and then the heat-insulating strips are threaded into two pieces In the process tank of the aluminum profile, it is then rolled, causing the material structure to change, causing stress and making the overall strength of the profile poor. This process limits the strength of the insulation material, and is sometimes even used for profiles with slightly larger hardness. Obvious cracks or breaks make it a scrap product.
2. Profile cross-sectional area
Glue-injected heat-insulating aluminum profiles have a compact structure, small size and appearance; strip-type heat-insulating aluminum profiles require that the hardness of the profile should not be very high and must overcome torsional force. Its cross-sectional area is large and the overall appearance is relatively wide.
3. Profile yield
For heat-insulating aluminum profiles of the same model and length, compared with the cast-type ones, the strip-type ones have a larger cross-sectional area and the weight of the aluminum per meter is greater than that of the cast-type ones, so their output is The efficiency is lower than that of glue-injected composite aluminum profiles [about 13%]. Manufacturing 1 square meter of doors and windows consumes approximately 1-1.5 kilograms more aluminum profiles.
4. High processing efficiency and high yield
Glue injection thermal insulation profiles have a high yield in the process, the process is stable and reliable, and there are almost no defective products. It is especially suitable for large-scale and continuous production. A five-person shift can produce 6-8 tons, and a 10-person shift can produce 6-8 tons. 12-16 tons, which cannot be achieved by the strip threading process.
5. Plasticity (window type)
Nowadays, there are various doors and windows, and there are more and more special-shaped doors and windows. Making special-shaped doors and windows requires that the plasticity of the profile must be good. Cast-type heat-insulating aluminum profiles can be processed into doors and windows of any shape, including arc-shaped shapes with a relatively small radius. Because the connection between the heat-insulating strip and the aluminum profile is not strong in the through-strip type, when the aluminum profile becomes larger, the heat-insulating strip is easy to come out of the connection groove of the aluminum profile, so its window shape is subject to certain restrictions.
6. Thermal insulation (fairly)
The cast-type heat-insulating aluminum profiles have performed satisfactorily in long-term tests and practices. Since the slots are solid, the air convection conduction factor is reduced, so the injection-type heat insulation is slightly better.
7. Double color inside and outside
The aluminum alloy part of the strip-type heat-insulating aluminum profile is extruded twice. The inner and outer parts of the aluminum profile are surface treated separately, and then the two-color structure can be completed through toothing, striping, and rolling.
Casting two-color molding process:
(1) The inner and outer parts of the aluminum profile are surface treated separately.
(2) Make the necessary connections, glue injection, and bridge cutting of the aluminum profiles. This method has fast compounding speed, high efficiency, smooth profiles, and can even effectively adjust the deformation problems during the profile backlog process. After the above comprehensive comparative analysis, more people can understand the excellent advantages of glue-injected heat-insulating aluminum profiles. The comprehensive performance enables this technology to be more widely used and developed in domestic and foreign markets.
Cost-performance analysis of glue injection and strip insulation systems-
There have been many issues surrounding us in recent times, among which two issues need to be addressed.We pay special attention to it. First, the newly put into operation in 2005 will be between 68.4 million and 70 million kilowatts of generating units. The electricity consumption of the whole society will reach 2.422 billion kilowatts. The maximum annual power supply gap will reach 23 million kilowatts, which is significantly lower than last year. In the existing electricity consumption structure, summer air conditioning electricity consumption accounts for one-third. The second is the government's multiple regulatory policies to deal with the excessive growth in housing prices across the country. We see that the government has made building energy conservation a top priority for national development. For real estate developers and door, window and curtain wall companies, a door, window and curtain wall insulation technology that is highly efficient, energy-saving and moderately cost-effective should be the best choice.
In the current construction market, there are two main technologies for insulated aluminum doors and windows. One is the strip-type insulation technology from Europe, and the other is the glue-injection insulation technology from North America. At present, the "heat-breaking cold bridge technology" commonly mentioned by everyone generally refers to the strip-type heat insulation technology. As for glue injection thermal insulation technology, most people do not understand the characteristics of this technology. In fact, both the glue injection type and the strip-threading type belong to the category of "heat-breaking cold bridge technology". The prototype of glue-injection insulation technology was born in the United States as early as 1937. In the 1970s, the first glue-injection insulation aluminum production line was introduced from Hong Kong to Guangdong, China, so glue-injection insulation technology is no stranger to us.
Then, Are all thermally insulated and energy-saving aluminum windows and curtain wall products energy-saving products with thermal insulation properties but higher costs? Is it true that with the continuous adjustment of housing prices, insulated aluminum windows and curtain wall products will be carefully selected by developers? Our answer is no. The "Energy Star" program in the United States and the "Low-interest Loan Building Doors and Windows Energy Saving Program" led by Japan's Ministry of Construction and Industry are both designated to use injection-type thermal insulation technology. This fully demonstrates that glue-injection thermal insulation technology is an advanced structural thermal insulation technology that complies with international building energy-saving standards and is moderately cost-effective.
