Lightweight environment-friendly elastic sound insulation composite material, sound insulation pad and preparation method of sound insulation pad

Abstract

The light-weight environment-friendly elastic sound insulation composite material is prepared from the following raw material components in parts by mass: 5 to 20 parts of butyl rubber, 5 to 20 parts of styrene elastomer, 20 to 50 parts of floating bead, 10 to 50 parts of flame retardant, 2 to 15 parts of plasticizer, 20 to 200 parts of inorganic filler and 2 to 5 parts of auxiliary agent. The sound insulation pad comprises a sound insulation rubber layer and wrapping layers, the sound insulation rubber layer is formed by plasticizing a light-weight environment-friendly elastic sound insulation composite material, and the wrapping layers are connected to the upper surface and the lower surface of the sound insulation rubber layer in a calendering mode to form a three-layer structure in a composite mode. According to the technical scheme, environment-friendly raw materials are adopted, the composite material comprises butyl rubber and a styrene block copolymer which are all-hydrocarbon-structure high-molecular compounds, the composite material is low in VOC and free of formaldehyde, a halogen-free flame retardant is adopted, and during combustion, low smoke and low smoke toxicity are achieved, and no toxic gas such as hydrogen chloride and dioxin is released; and the floating beads, the inorganic filler and the like are natural materials, and are environment-friendly and non-combustible.

Description

technical field [0001] The invention belongs to the field of macromolecule materials, and in particular relates to a sound-insulating composite material which is environmentally friendly and lightweight, has high flexibility, good sound-insulating and shock-absorbing properties, and is convenient for production and installation, a sound-insulating pad using the sound-insulating composite material and its Preparation. Background technique [0002] The polymer sound insulation materials currently used in the field of rail transit are mainly based on polyvinyl chloride resin (PVC), which contains phthalic acid plasticizers, antimony trioxide and inorganic fillers to achieve material flexibility, high flame retardancy and High density performance requirements. Due to the need to add a large amount of plasticizers and antimony trioxide and other flame retardants to this material, the environmental protection is poor, and it cannot meet the EU RoSH environmental protection direct...

AI Technical Summary

Problems solved by technology

The resin matrix selected by this method is a polar material, and the hardness of the material is relatively high. The softness of the prepared sound insulation material is not good. In addition, a large amount of inorganic materials are added, resulting in a high density of the material, which does not meet the lightweight requirements.

[0005] The patent application number 201210199919.9 discloses a high-density, low-smoke flame-retardant sound-insulating mat. The flame retardant used in this technical solution involves an intumescent flame retardant, but the resin matrix of the material is chlorinated polyethylene and Polar rubber such as styrene-butadiene rubber has a relatively high hardness, and chlorinated polyethylene contains chlorine, which causes the release of toxic hydrogen chloride gas when it is burned, which cannot meet environmental protection requirements. In addition, a large amount of inorganic fillers are added, resulting in heavy weight and no Meet lightweight requirements

[0006] The patent with application number 201110340796.1 discloses a sound-insulating material. The sound-insulating material uses polyethylene resin as the matrix resin. By adding hollow glass microspheres, the material density can be effectively reduced and the sound-insulating performance can be improved, which meets the requirements of lightweight materials. development direction, but the cost of this type of material is too high to be widely used in the field of sound insulation materials

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