Shielded incident acoustic wave material

A technology of sound waves and additives, applied in the field of polymer materials, can solve problems such as difficult to make thin films, achieve the effects of reducing noise and improving working and living environments

Inactive Publication Date: 2004-12-22
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its composition (fiber and binder), the material can only be molded by injection molding or compression molding, so it is difficult to make a large-area film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Material properties

Embodiment 2

[0010] Mix the following components evenly and knead on an open mill to make a soft sheet of 1mm. The sound insulation is between 18~30dB (100~1600Hz).

[0011] PVC: 5%, tungsten powder (1.8 microns): 90%, isopropyl tricarboxy titanate: 2%, dibutyl phthalate: 2%, barium stearate: 0.5%, tribasic sulfuric acid Lead: 0.5%.

Embodiment 3

[0013] Take PVC: 60%, tungsten powder (0.2 microns): 10%, isopropyl tricarboxy titanate: 15%, dibutyl phthalate: 9%, barium stearate: 2%, tribasic Lead sulfate: 4%, after processing, a sound insulation and damping material with a sound insulation index of 26.2 decibels can be obtained.

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PUM

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Abstract

A material for shielding incident sound waves contains PVC (5-60 wt%), tungsten powder (10-90), and assistant (5-30). Its advantages are better mechanical and sound shielding performance, high resistance to fire and chemical corrosion, high machinability, and no poison. Its sound shielding index can reach 22.7 db.

Description

technical field [0001] The invention relates to a sound-insulating composite material, in particular to a material for shielding incident sound waves, and belongs to the field of polymer materials. Background technique [0002] The development and application of sound insulation materials has a history of decades, and a relatively mature development and production system has been formed. However, the sound insulation materials commonly used in the market currently have some shortcomings such as: high product cost, mostly hard High-quality materials, not easy to secondary processing and difficult to sound insulation treatment of irregular objects, so its application range has certain limitations. After literature search, it is found that the Chinese patent number is: 97197487.X, and the patent name is: high-density composite material, which discloses a high-density composite material. Tungsten powder is combined to create a material that can be used as a lead substitute (as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/08C08L27/06
Inventor 蔡伟民蔡俊徐菲
Owner SHANGHAI JIAOTONG UNIV
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