Preparation method of high-strength porous sound insulation board

Abstract

The invention discloses a preparation method of a high-strength porous sound insulation board and belongs to the field of sound insulation materials. The preparation method is characterized in that directional pore-forming balls for pore forming are added into raw materials, wherein the directional pore-forming balls are decomposed due to internal heating and gradually expand into an ellipsoidal shape from a spherical shape to form a plurality of ellipsoidal closed air holes in the same distribution direction in the raw materials so as to greatly enhance the compressive mechanical strength of the material in the one-way stress load direction, linear extension is carried out in the horizontal direction while the directional pore-forming balls expand so as to achieve mutual winding of the adjacent directional pore-forming balls, and after secondary heating and melting, a plurality of irregular and disordered pore channels for connecting adjacent pores are generated between the adjacent directional pore-forming balls so as to communicate the closed pores and greatly enhance the sound absorption and sound insulation effects of the material, so that the material can be suitable for environments with higher requirements on sound insulation and one-way mechanical strength, and the application range of the material is effectively expanded.

Description

technical field [0001] The invention relates to the field of sound-insulating materials, in particular to a method for preparing a high-strength porous sound-insulating board. Background technique [0002] Sound insulation materials refer to a class of materials, components or structures that can block sound transmission or reduce transmitted sound energy, and are characterized by heavy weight and high density, such as steel plates, lead plates, concrete walls, brick walls, etc. [0003] For sound insulation materials, in order to weaken the transmitted sound energy and block the transmission of sound, they cannot be as porous, loose, and breathable as sound-absorbing materials. On the contrary, their materials should be heavy and dense, such as steel plates, lead plates, brick walls, etc. . The material requirement of the sound insulation material is dense without pores or gaps; it has a relatively large weight. Because this kind of sound insulation material is dense, it ...

AI Technical Summary

Problems solved by technology

Most of the existing sound insulation materials increase the surface density and thickness to improve the sound insulation effect, which not only consumes a lot of raw materials, but also makes the sound insulation materials made very heavy and thick, which limits its use environment and increases the difficulty of installation

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