Soft high-specific-gravity rubber-plastic foam material for insulating sound and reducing noise

A rubber-plastic foam material, sound insulation and noise reduction technology, applied in the field of polymer foam materials, can solve the problems of inability to overcome the resonance frequency and the sound insulation trough of the matching effect, the sound insulation effect is not ideal, and it is difficult to process and use. Good sound insulation and mechanical properties, good sound insulation and damping properties, the effect of increasing areal density

Active Publication Date: 2016-11-09
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The development of sound insulation materials has a history of several decades. The main shortcomings of sound insulation materials are: the cost of products is high, most of them are hard materials, it is not easy to use in subsequent processing, and the sound insulation effect is not ideal, etc.
Chinese invention patent ZL02157785.4 discloses a soft ultra-high specific gravity composite material for sound insulation and noise reduction. This patent uses tungsten powder and thermoplastics as raw materials to make a soft material with certain sound insulation properties, but Due to its general damping performance, it cannot overcome the sound insulation trough caused by the resonance frequency and matching effect in actual use

Method used

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  • Soft high-specific-gravity rubber-plastic foam material for insulating sound and reducing noise
  • Soft high-specific-gravity rubber-plastic foam material for insulating sound and reducing noise
  • Soft high-specific-gravity rubber-plastic foam material for insulating sound and reducing noise

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Mix each component in the following proportions on an open mill evenly, and mold it into a 7 mm soft foam material, and its weighted sound insulation is about 32dB.

[0025] High molecular polymer: 50% (polystyrene: 15%, nitrile rubber: 35%), iron powder (0.1 micron): 20%, monoalkoxy tris (dioctylphosphoryloxy) titanate : 5%, dibutyl phthalate: 5%, sulfur: 5%; azodicarbonamide: 9%; N-cyclohexyl-2-benzothiazole sulfenamide: 2%; stearic acid Barium: 2%, lead sulfate tribasic: 2%.

Embodiment 2

[0027] The following ingredients are mixed evenly on the open mill, molded into a 6mm soft foam material, which forms a sandwich structure with the gypsum board, and its sound insulation is between 34 and 36 decibels (specifically, each center The sound insulation at the frequency is shown in the table below).

[0028] Nitrile rubber: 35%, polyvinyl chloride: 20%, tungsten powder (10 microns): 30%, isopropyl tricarboxy titanate: 1%, dibutyl phthalate: 3%, stearic acid Barium: 0.5%, lead sulfate tribasic: 0.5%; sulfur: 4%; azodicarbonamide: 5%; N-cyclohexyl-2-benzothiazole sulfenamide: 1%.

[0029] Center frequency [Hz]

Embodiment 3

[0031] The following ingredients are mixed evenly on the open mill, and molded into a 6 mm soft foam material, which has good anti-aging ability, and its average sound insulation is about 30 decibels, and its sound insulation is shown in the following table Show.

[0032] High molecular polymer: 45% (neoprene rubber: 35%; polyvinyl chloride: 10%), copper powder (10 microns): 25%, monoalkoxy tris (dioctylphosphoryloxy) titanate : 5%, dibutyl phthalate: 8%, barium stearate: 1%; sulfur: 5%; azodicarbonamide: 5%; N-cyclohexyl-2-benzothiazole sulfen Amide: 2%; Zinc Stearate: 2%, Lead Sulfate Tribasic: 2%.

[0033]

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Abstract

A related soft high-specific-gravity rubber-plastic foam material for insulating sound and reducing noise consists of the following components in percent by weight: 15%-45% of rubber, 5%-20% of plastic, 10%-30% of a heavy metal powder, 3%-10% of a plasticizer, 1%-5% of a stabilizer, 1%-10% of a foaming agent, 1%-5% of a sulfurizing agent, 1%-2% of an accelerator and 1%-7% of a coupling agent. Compared with the prior art, the soft high-specific-gravity rubber-plastic foam material possesses good elasticity of rubber and good glutinousness of plastic, also possesses relatively high surface density demanded by sound-proof mass action law and additional action of "foam damping", avoids the sound-proof low ebb of a conventional sound-proof material under the effect of resonant frequency and a coincident effect, and is extremely suitable for quality improvement of all kinds of sound environments and noise-controlling places.

Description

technical field [0001] The invention relates to a polymer foaming material, in particular to a soft high specific gravity rubber and plastic foaming material used for sound insulation and noise reduction. Background technique [0002] Sound insulation materials are widely used in many fields of national economy. The development of sound insulation materials has a history of several decades. The main shortcomings of sound insulation materials are: the cost of products is high, most of them are hard materials, it is not easy to use in subsequent processing, and the sound insulation effect is not ideal. [0003] In sound insulation materials, the sound insulation performance of single-layer homogeneous sound insulation materials follows the principles of stiffness control, damping control, mass action control and coincidence effect control, that is, in different frequency ranges, the sound insulation performance is affected by different characteristics of the material control....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L25/06C08L27/06C08L11/00C08L23/16C08L75/04C08L23/06C08K13/02C08K3/08C08K5/12C08K3/06C08K5/47C08K5/098C08K5/10C08K3/22C08K5/40C08J9/10
CPCC08J9/102C08J9/103C08J2309/02C08J2311/00C08J2323/16C08J2423/06C08J2425/06C08J2427/06C08J2475/04C08L9/02C08L11/00C08L23/16C08L2205/03C08L25/06C08K13/02C08K2003/0856C08K5/12C08K3/06C08K5/47C08K5/098C08L27/06C08K2003/0887C08K5/10C08K2003/085C08L75/04C08K5/09C08K2003/2296C08L23/06C08K5/40C08K5/11
Inventor 蔡俊傅强左洪运
Owner SHANGHAI JIAO TONG UNIV
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