With the improvement of people's living and living environment, sound insulation cotton and silent canopy came into being, allowing you to feel the silent noise of the city.
The principle that sound insulation cotton can sound insulation is only related to the ratio of the volume of air in the fiber material to the volume of the material, and the ratio above 0.3 is called sound insulation cotton. The sound waves compete for multiple reflections, superpositions, and collisions in the multi-fiber structure of the sound insulation cotton, and the energy of the sound waves is converted into heat energy. Popular sound insulation cotton materials are: polyester fiber, polyurethane foam, high-density egg cotton, glass fiber, gradient cotton, rock wool, etc. Sound insulation cotton is the most widely used in the two industries of construction and automobile. Especially in the automotive industry, the application of sound insulation cotton has brought users an increase in the value of use. Generally, there are sound insulation in the hood, door, roof and floor of the car. Cotton application. After the vehicle is soundproofed by soundproof cotton, it brings a good driving experience. Sound insulation cotton has the function of heat insulation and shock absorption, reducing metal fatigue caused by vibration of automobile parts.
With the improvement of technology and craftsmanship, the use of sound insulation cotton has a self-adhesive function. The realization of the self-adhesive function comes from the sound insulation cotton hot melt adhesive or the sound insulation cotton hot melt pressure-sensitive adhesive coated on the back of the sound insulation cotton, which is also called by users. Sound insulation cotton pads. This kind of sound insulation cotton brings convenience to the installation, and the use of sound insulation cotton with a hot melt adhesive back coating of the sound insulation cotton greatly improves the operation efficiency. There are also sound insulation cottons that are composited with multiple layers of materials, and the middle composite layer also needs to use sound insulation cotton hot melt adhesive.