1.What influence do material properties have on sound insulation?
The core of the color-coated coil is a thin steel plate (usually 0.1~2mm thick), with a colored coating on the surface (mainly for anti-corrosion and decoration). The steel plate itself is a high-density, high-rigidity material, and its physical properties determine:
Weak barrier ability to airborne sound transmission: When sound waves hit the steel plate, it is easy to cause the steel plate to vibrate, and then transmit the sound to the other side.
Poor attenuation ability for solid sound transmission (such as vibration noise): The rigidity of the steel plate makes it a good vibration conductor. If there is a structural connection (such as fixing with the keel or frame), the vibration noise will be quickly transmitted through the steel plate.
2.What effect do thickness and structure have on sound insulation?
Thickness influence: Thicker color-coated coils (such as more than 1mm) have slightly better sound insulation than ultra-thin ones (less than 0.3mm), but the improvement is very limited. Even if the thickness increases, the inherent high conductivity of the steel plate still cannot effectively block sound waves.
Single structural defects: Pure color-coated coils are usually single-layer flat structures, lacking the porous, loose or multi-layer composite structure required for sound insulation (such as the porous sound absorption of sound insulation cotton and the buffering effect of the air layer), and cannot reduce noise through the combination of "sound absorption + sound insulation".
3.How is the sound insulation performance of color coated coils in actual applications?
In actual scenarios (such as building exterior walls, roofs, equipment housings, etc.), color-coated coils, if used alone, have almost no effective sound insulation effect:
When used in building envelope structures, if only color-coated coils are used as panels, external noise (such as wind noise, vehicle noise) will easily penetrate, and even amplify the noise due to resonance.
If used with other materials (such as composite panels with rock wool and polyurethane as the core layer), the sound insulation effect mainly depends on the sound absorption/sound insulation ability of the core layer, and the color-coated coils are only used as a protective layer, and their own contribution to sound insulation is minimal.
4.How is the sound insulation effect of color coated steel coils compared with common sound insulation materials?
Color-coated coil: The sound insulation principle is high-density rigid reflection;
Sound insulation cotton: The sound insulation principle is porous structure sound absorption, and the sound insulation effect is good.
Sound insulation board: The sound insulation principle is multi-layer structure + damping layer vibration reduction, and the sound insulation effect is excellent.
5.What are the main advantages of color coated coils?
The main advantages of color-coated coils are anti-corrosion, decoration, and lightweight, but their sound insulation performance is almost negligible. If color-coated coils are used as building materials and sound insulation is taken into account, a composite structure design must be adopted (such as a combination with sound insulation cotton, air layer, and damping layer). At this time, the sound insulation effect is determined by the composite system, not the color-coated coil itself. Therefore, it is not recommended to use color-coated coils as a single sound insulation material.