Sound-absorbing material block, method for preparing the same and its application

Patent metadata

Field	Value
Publication number	US-12538070-B2
Application number	US-202318095000-A
Country	US
Kind code	B2
Filing date	Jan 10, 2023
Priority date	Sep 5, 2022
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A sound-absorbing material block, a method for preparing the same and application thereof are provided. The sound-absorbing material block includes three-dimensional open-cell foam, sound-absorbing material powder, a binder, a gel, and a cross-linking agent. The sound-absorbing material powder is bonded to each other and connected to the three-dimensional open-cell foam by means of the gel, the cross-linking agent, and the binder, by mass of the sound-absorbing material powder, the gel accounts for 1 wt % to 5 wt % of the sound-absorbing material powder, and the binder accounts for 1 wt % to 8 wt % of the sound-absorbing material powder, and by mass of the gel, the cross-linking agent accounts for 1 wt % to 10 wt % of the gel. The sound-absorbing material block according to the present disclosure reduces an additive amount of the binder, and significantly improves sound-absorbing performance and strength of the material block.

First claim

What is claimed is:

1 . A sound-absorbing material block, comprising three-dimensional open-cell foam, sound-absorbing material powder, a binder, a gel, and a cross-linking agent;
wherein the sound-absorbing material powder is bonded to each other and connected to the three-dimensional open-cell foam by means of the gel, the cross-linking agent, and the binder, by mass of the sound-absorbing material powder, the gel accounts for 1 wt % to 5 wt % of the sound-absorbing material powder, and the binder accounts for 1 wt % to 8 wt % of the sound-absorbing material powder, and by mass of the gel, the cross-linking agent accounts for 1 wt % to 10 wt % of the gel; wherein the sound-absorbing material powder is a zeolite material consisting of one or more of an MFI molecular sieve, an MEL molecular sieve, and an FER molecular sieve with Si/Al ratios greater than 100 and a particle size less than 10 μm; wherein the cross-linking agent is one or more of N,N′-methylene diacrylamide, boric acid, calcium chloride, and aluminum chloride.

2 . The sound-absorbing material block as described in claim 1 , wherein the three-dimensional open-cell foam has a porosity greater than 60%, and a density ranging from 10 mg/cm3 to 100 mg/cm3.

3 . The sound-absorbing material block as described in any one of claim 1 , wherein the three-dimensional open-cell foam is melamine foam or polyurethane foam.

4 . The sound-absorbing material block as described in claim 1 , wherein the binder is one or more of polyacrylate, styrene-butadiene emulsion, polystyrene acrylate, polystyrene acetate, polyurethane resin, and polyethyl vinyl acetate.

5 . The sound-absorbing material block as described in claim 1 , wherein the gel is one or more of sodium carboxymethyl cellulose, sodium alginate, chitosan, sodium polyacrylate, polyacrylamide, gelatin, and polyvinyl alcohol.

Assignees

• Aac Acoustic Tech Shenzhen Co Ltd

Inventors

• Wang Zhongyang
• Wang Hezhi
• Zhang Jie

Classifications

• C08J2433/26

  Homopolymers or copolymers of acrylamide or methacrylamide · CPC title

• C08J2433/04

  esters · CPC title

• C08J2433/02

  Homopolymers or copolymers of acids; Metal or ammonium salts thereof · CPC title

• C08J2425/18

  Homopolymers or copolymers of aromatic monomers containing elements other than carbon and hydrogen · CPC title

• C08J2409/08

  Latex · CPC title