In the field of modern construction, people's demand for the comfort of the living and working environment is increasing, doors and windows as an important part of the building envelope, its heat preservation and sound insulation performance is more and more concerned. Aluminum-plastic co-extruded profiles by virtue of the unique structural design and material properties, in the heat preservation and sound insulation to show the advantages, to create a comfortable indoor environment to provide a strong guarantee.

Aluminum-plastic co-extruded profiles from the material characteristics of thermal insulation advantages

The key role of foamed plastic insulation layer

Aluminum-plastic co-extruded profile adopts aluminum alloy as the supporting skeleton, and the outer side is tightly wrapped with foamed plastic insulation layer. There are a large number of tiny closed bubbles inside the foamed plastic, which are filled with air, greatly hindering the conduction of heat. The thermal conductivity of foamed plastic is usually only 0.03 - 0.04W/(m-K), compared with the thermal conductivity of aluminum alloy, which is as high as 160W/(m-K). Ordinary aluminum alloy doors and windows due to the lack of efficient thermal insulation layer, the heat will be quickly passed through the aluminum alloy profile, resulting in a large amount of indoor heat loss or a large influx of outdoor heat. The aluminum-plastic co-extruded profiles of the foam plastic insulation layer, as if the windows and doors put on a thick layer of thermal insulation clothing, cutting off most of the heat conduction path, effectively reducing the rate of heat transfer.

Material thermal conductivity comparison highlights the advantages

Through the comparison of the thermal conductivity of different materials, can more intuitively see the advantages of aluminum-plastic co-extruded profiles of heat preservation. Common door and window profiles, for example, plastic steel profile thermal conductivity of 0.19 - 0.22W / (m-K), broken aluminum alloy profiles due to the middle of the thermal bar, the thermal conductivity has been reduced, but still in the range of 2.0 - 3.5W / (m-K). Aluminum-plastic co-extruded profile by virtue of the foam plastic insulation layer, in the heat preservation performance is significantly better than these traditional profiles, greatly reducing the building in the heating and cooling process of energy loss.

Structural design enhances thermal and acoustic insulation

Multi-cavity profiles provide a double boost to thermal and acoustic insulation.

Aluminum-plastic co-extruded profiles are designed as multi-cavity profiles, with several independent air chambers distributed inside the profile. Air is a good insulating medium, and these chambers form an insulating barrier that further prevents the direct conduction of heat. When heat tries to pass through the profile, it needs to be refracted and reflected in the multiple air chambers, which greatly increases the path and difficulty of heat transfer, thus significantly improving the thermal insulation performance.

Multi-cavity profiles also play an important role in sound insulation. Different frequencies of sound in the process of propagation, encounter multi-chamber profile will occur many times reflection and refraction. High-frequency sound is more easily absorbed and scattered by the surface of the profile and the walls of the chamber, while low-frequency sound will be greatly attenuated after being blocked by multiple chambers. For example, the high-frequency part of traffic noise, such as the sound of car horns, can be effectively reduced by the multiple reflections of multi-chamber profiles to reduce the volume of the sound transmitted into the room; and for the low-frequency engine roar, the chamber structure of multi-chamber profiles can also weaken the energy of its propagation.

The significance of sealing design for heat preservation and sound insulation

Aluminum-plastic co-extruded profile adopts multi-channel sealing design between the window frame and the window sash, with high-quality EPDM sealing tape. This kind of adhesive tape has good elasticity and weather resistance, and when the window or door is closed, it can fit closely and form an efficient seal, effectively preventing air infiltration. In terms of thermal insulation, good sealing can reduce heat loss due to air infiltration and further enhance the thermal insulation effect. According to relevant research, the air infiltration heat loss of windows and doors accounts for about 20% - 30% of the total heat loss of windows and doors, aluminum-plastic co-extruded profiles can significantly reduce this part of the heat loss of good airtightness.

In terms of sound insulation, sealing design is also crucial. Sound propagation requires a medium, and air is one of the main mediums for sound propagation. Through the multi-channel sealing design, the outdoor noise is prevented from being transmitted to the interior through the gaps in the doors and windows, which greatly improves the sound insulation performance of the doors and windows. When the outside noise comes, the sealing layer formed by the sealing tape can effectively block the spread of sound and reduce the sound leakage.

Thermal insulation and sound insulation effect in the actual building environment

Example of thermal insulation effect

In the northern cold region of a residential district, the use of aluminum-plastic co-extruded windows and doors, the residents reflect the indoor temperature in winter is significantly more stable, without the need to frequently adjust the heating temperature. According to the statistics, the energy consumption of winter heating in this district has been reduced by 30% - 40% compared with the surrounding districts adopting common aluminum doors and windows. In winter, when the outdoor temperature drops to -20℃, the indoor temperature of aluminum co-extruded windows and doors can still be maintained above 20℃, creating a warm and comfortable living environment for the residents.

Example of sound insulation effect

After installing aluminum-plastic co-extruded doors and windows in an office building next to the city's main road, the indoor staff obviously feel that the noise pollution has been effectively controlled. Measured by professional noise detection equipment, in the peak traffic period, the outdoor noise can reach 70 - 80 dB, while the indoor noise is only 35 - 40 dB, the sound insulation amount reaches 35 - 40 dB. This allows staff to work efficiently in a quiet environment, greatly improving work efficiency. In schools, hospitals and other places with high requirements for a quiet environment, aluminum co-extruded windows and doors are also effective in blocking external noise, providing teachers, students and patients with a quiet learning and treatment environment.

Conclusion

Aluminum-plastic co-extruded profile through unique material properties and subtle structural design, in the thermal insulation and sound insulation performance shows significant advantages. From the thermal insulation effect of the Foamed Plastic Insulation Layer, to the synergistic effect of the multi-cavity profiles and sealing design on thermal and acoustic insulation, to the outstanding performance in real building environments, Aluminum Co-Extruded Profiles make an important contribution to improving the comfort of buildings. In the pursuit of high quality living and working environments, aluminum-plastic co-extruded profiles are undoubtedly the ideal choice for building doors and windows.