Preparation method of composite functional material for sound absorption and noise reduction with gradual impedance gradient

A composite function and sound-absorbing technology, which is applied in the field of textile materials, can solve the problems of not meeting the requirements of lightweight interior materials for traffic functions, occupying space in the car, and increasing the thickness of materials, so as to achieve good novelty, improve absorption efficiency, The effect of improving comfort

Active Publication Date: 2019-10-18
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For sound-absorbing and noise-reducing materials used as automotive interiors, the increase in material thickness will not only increase the cost, but also occupy the interior space of the car, and more importantly, it does not meet the lightweight requirements for traffic function interior materials

Method used

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  • Preparation method of composite functional material for sound absorption and noise reduction with gradual impedance gradient

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The invention discloses a process preparation method of a composite functional material for sound absorption and noise reduction with gradually changing impedance, which specifically includes the following:

[0026] The processing technology of the pollution-repelling and sound-absorbing decorative layer is as follows:

[0027] 1) Process polypropylene fibers with triangular cross-sections into needle-punched nonwovens through carding, laying, pre-needling, main needling, suede needling, etc., to form a pollution-repelling and sound-absorbing decorative layer for sound-absorbing products1 ;

[0028] 2) Use the padding method for flame retardant finishing, two dipping and two rolling at room temperature, the liquid rolling rate is 75%, then pre-baking at 110°C for 10 minutes, baking at 175°C for 2.5 minutes, steaming for 10 minutes, washing in cold water for 10 minutes, and drying Drying and finishing working solution: ammonium polyphosphate 120g / L, JHF-9 high-efficienc...

Embodiment 2

[0039] The invention discloses a process preparation method of a composite functional material for sound absorption and noise reduction with gradually changing impedance, which specifically includes the following:

[0040] The processing technology of the pollution-repelling and sound-absorbing decorative layer is as follows:

[0041] 1) Process polypropylene fibers with triangular cross-sections into needle-punched nonwovens through carding, laying, pre-needling, main needling, suede needling, etc., to form a pollution-repelling and sound-absorbing decorative layer for sound-absorbing products1 ;

[0042] 2) Use the padding method for flame retardant finishing, two dipping and two rolling at room temperature, the liquid rolling rate is 70%, then pre-baking at 130°C for 6 minutes, baking at 185°C for 1 minute, steaming for 12 minutes, washing in cold water for 10 minutes, and drying , Finishing working solution: ammonium polyphosphate 100g / L, JHF-9 high-efficiency flame retar...

Embodiment 3

[0053] The invention discloses a process preparation method of a composite functional material for sound absorption and noise reduction with gradually changing impedance, which specifically includes the following:

[0054] The processing technology of the pollution-repelling and sound-absorbing decorative layer is as follows:

[0055] 1) Process polypropylene fibers with triangular cross-sections into needle-punched nonwovens through carding, laying, pre-needling, main needling, suede needling, etc., to form a pollution-repelling and sound-absorbing decorative layer for sound-absorbing products1 ;

[0056] 2) Use the padding method for flame retardant finishing, two dipping and two rolling at room temperature, the liquid rolling rate is 65%, then pre-baking at 100°C for 10 minutes, baking at 195°C for 0.5 minutes, steaming for 8 minutes, washing in cold water for 10 minutes, and drying Drying and finishing working solution: ammonium polyphosphate 120g / L, JHF-9 high-efficiency...

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Abstract

The invention discloses a preparation method of a resistant gradually changed sound-absorbing and noise-reducing composite functional material. A non-woven material is used as a basis of the material. The resistant gradually changed sound-absorbing and noise-reducing composite functional material is characterized by comprising a stain-repellent and sound-absorbing decorative layer, a sound-absorbing functional layer with a gradient structure and a heat-insulation sound-absorbing cavity layer. The stain-repellent and sound-absorbing decorative layer is made of polypropylene fibers with triangular cross sections; the sound-absorbing functional layer with the gradient structure is made of modified polyester / polyacrylamide sea-island super-fine fibers; and the heat-insulation sound-absorbing cavity layer is made of hollow polyester fibers. After the composite functional material is subjected to padding treatment and foam treatment, the composite functional material has functions of stain repellency, flame retardance, sound absorbing and noise reduction. The material has sound-absorbing gradient distribution structures from outside to inside, the sound-absorbing frequency band of the product is broadened while the thickness of the material is not increased, preparation of a fiber-based thin flexible sound absorbing body is realized, the thin light efficient sound-absorbing and noise-reducing material is obtained, and requirements on light weight of interior decorative material of vehicles are met.

Description

technical field [0001] The invention relates to a preparation method of a sound-absorbing and noise-reducing composite functional material with gradually changing impedance, belonging to the technical field of textile materials. Background technique [0002] Noise is the main source of environmental pollution that affects people's work and living comfort. With the advancement of science and technology and social development, people's awareness of the hazards of noise and the emphasis on noise control are constantly increasing. Compared with sound absorption and noise reduction in buildings, noise control in vehicle cabins is a relatively new topic. Not only are the sources of noise different, but the noise elimination mechanisms and requirements for noise reduction materials are also different. The noise control in the building mainly relies on the sound insulation performance of the walls to block the external source noise, and the external source noise entering the room ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B7/12B32B27/02B32B27/12B32B27/32B32B27/34B32B27/36B32B33/00B32B37/06B32B37/10B32B37/12D06M11/49D06M11/72D06M13/08D06M13/148D06M13/256D06M13/288D06M13/368D06M13/432D06M13/463D06M15/09D06M15/263D06M15/285D06M15/333
Inventor 巩继贤张春春范晓丹李辉芹李秋瑾李政张健飞李洋王振宇
Owner TIANJIN POLYTECHNIC UNIV
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