Heat-insulating and sound-absorbing board and preparation method thereof

Abstract

The invention belongs to the technical field of heat insulation and sound absorption, and discloses a heat-insulating and sound-absorbing plate and a preparation method thereof. The heat-insulating and sound-absorbing plate is composed of a first panel layer, a second panel layer and a core material layer, and the core material layer is located between the first panel layer and the second panel layer; the core material layer is composed of a wooden felt, aerogel and an expandable microsphere foaming agent, and the wooden felt is filled with the aerogel and the expandable microsphere foaming agent; the first panel layer and the second panel layer are fiber-reinforced resin-based composite sheets, the first panel layer and the core material layer are integrally formed, and the second panel layer and the core material layer are integrally formed. According to the heat-insulating and sound-absorbing board prepared by the method, a traditional wooden sandwich sound-absorbing board is improved, the defects of low strength, poor corrosion resistance, poor fire resistance and the like of the traditional wooden sandwich sound-absorbing board are overcome, and a novel heat-insulating and sound-absorbing structure integrating excellent high-frequency, medium-frequency and low-frequency absorption characteristics, mechanical properties, safety and heat-insulating and high-temperature properties is obtained.

Description

technical field [0001] The invention belongs to the technical field of heat insulation and sound absorption, and in particular relates to a heat insulation and sound absorption board and a preparation method thereof. Background technique [0002] With the development of modern industry, noise pollution has become one of the environmental pollution problems that cannot be ignored, seriously affecting people's work, study and rest. As one of the effective measures to reduce noise and improve the acoustic environment, sound-absorbing materials have been widely used in many practical engineering fields, especially in open or large closed environments. [0003] Most of the heat insulation and sound absorption materials currently used are organic synthesis and organic and inorganic minerals, such as mineral wool, foamed plastics, fiber cotton felt, foam glass and foam metal, wood panels, etc. Although these sound-absorbing materials have good sound-absorbing properties in the med...

AI Technical Summary

Problems solved by technology

Although these sound-absorbing materials have good sound-absorbing properties in the medium and high-frequency ranges, they also have many problems. Mineral fiber materials represented by ultra-fine glass wool have high density, high brittleness, serious water absorption, and easy Vibration drooping, poor thermal insulation performance, thick laying, large material loss and other defects, and the fiber is brittle in the construction project, which is easy to cause dust to escape and pollute the environment and cause lung diseases. The use of these materials cannot meet the energy-saving standards; Ordinary organic foams such as polystyrene foam, polyurethane foam, etc. have flame retardancy, corrosion resistance, poor aging resistance, high combustion density and release a large amount of toxic and harmful gases; foam glass has low strength, and the connectivity of its cell structure is not good. Good sound-absorbing effect; wooden boards have been used as sound-absorbing board core materials in some architectural decorations, but they have disadvantages such as moisture resistance, flame retardancy and poor mechanical properties, and wooden core materials have large holes due to their large holes. It mainly absorbs medium and high frequency sound waves, and its ability to absorb low frequencies is weak