Method for preparing decorative interior acoustic insulating material

Abstract

The invention relates to a method for preparing a decorative interior acoustic insulating material. The method comprises the following steps: (1) putting the nano-carbon black, silicon dioxide sol and an addition agent into a waterborne polyurethane emulsion, and ultrasonically processing to obtain a composite emulsion for use; (2) mixing the expanded vermiculite, magnesite and montmorillonoid with a silane coupling agent, grinding and dispersing for 2-2.5h, mixing the obtained materials with the other remaining materials, sufficiently stirring and performing melt extrusion and granulation in a twin-screw extruder at the temperature of 180-190 DEG C to obtain a modified mother granule; and (3) melting the modified mother granule in a screw extruder, ejecting the fused mass through a melt-blow die head spinneret orifice at the temperature of 230-250 DEG C, uniformly spraying the composite emulsion prepared by the step (1) to a silkscreen after the fiberyarns are collected to form a web on a receiving device, and obtaining the acoustic insulating non-woven material after the composite emulsion is fully cured and dried. By adopting the material, the specific surface area is large, the structure is more compact than that of the traditional non-woven material and the noise reduction effect is obvious.

Description

technical field [0001] The invention relates to a non-woven sound-absorbing material, in particular to a method for preparing a thermoplastic phenol resin non-woven sound-absorbing material coated with expanded vermiculite-compound emulsion for interior decoration. Background technique [0002] Now, with the continuous acceleration of urbanization, noise pollution is becoming more and more serious. In order to effectively cut off noise, the usual solution is to use soundproofing materials. Existing sound insulation materials are generally cement concrete, glass panels, etc., these sound insulation and so on. The sound insulation effect of these sound insulation materials is not very good, so the usual solution is to increase the thickness of the sound insulation materials. The problem caused by this is that the quality of the sound insulation material is too heavy, the cost is too high, and the installation process is very inconvenient. [0003] Polypropylene-based compos...

AI Technical Summary

Problems solved by technology

The problem caused by this is that the quality of the sound insulation material is too heavy, the cost is too high, and the installation process is very inconvenient.

[0003] Polypropylene-based composite non-woven materials made by meltblown method have become a kind of sound-absorbing materials widely used in automotive interiors due to their ultra-fine fiber structure, simple and efficient production, non-toxic and harmless, etc. Most of these materials have loose structures , the smooth fiber outer layer reduces the specific surface area of ​​the material, which shortens the attenuation and conversion time of the sound wave in the material, and cannot achieve a satisfactory sound absorption effect. In actual use, the noise reduction effect is often improved by increasing the thickness of the material At the same time, the finished product has disadvantages such as easy deformation, poor resilience, easy to generate static electricity, and poor heat resistance.