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Sound-absorbing composite and preparation method thereof

A technology of sound-absorbing composite material and polyurethane sponge, which is applied in the fields of noise suppression, chemical instruments and methods, lamination devices, etc., can solve problems such as unfavorable applications, increased vehicle weight, and high density of lead plates, and achieve excellent sound absorption and drop Noise performance, small thermal conductivity, small density effect

Active Publication Date: 2015-04-01
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned air-conditioning noise reduction device, the sponge, lead plate, sponge and recycled rubber are arranged in sequence to form the upper noise reduction device and the side noise reduction device. Although the sound insulation performance of the lead plate is fully utilized, the noise of the air conditioner is greatly reduced. However, the density of the lead plate in the air-conditioning noise reduction device is high, and when applied to the vehicle field, the weight of the vehicle will be significantly increased, which is not conducive to application

Method used

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  • Sound-absorbing composite and preparation method thereof

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preparation example Construction

[0043] The present invention also provides a preparation method of the sound-absorbing composite material, comprising the following steps:

[0044] The double-sided adhesive tape is placed between the polyurethane sponge and the melamine sponge, and then hot-pressed and compounded to obtain a semi-finished product of the sound-absorbing composite material, and the thickness ratio of the melamine sponge to the polyurethane sponge is 1:1.5~1:5;

[0045] After coating an adhesive on the melamine sponge of the semi-finished sound-absorbing composite material to form an adhesive layer, the sound-absorbing composite material is obtained.

[0046] In the present invention, double-sided tape is firstly placed between the melamine sponge and the polyurethane sponge with a thickness ratio of 1:1.5 to 1:5, and then hot-pressed composite is performed to obtain a semi-finished product of a sound-absorbing composite material.

[0047] The present invention uses polyurethane sponge as a raw ...

Embodiment 1

[0064] figure 1 The flow chart of the preparation of the sound-absorbing composite material provided in Example 1 of the present invention. see figure 1 , peel the melamine sponge block into a melamine sponge sheet with a thickness of 10mm, peel the polyurethane sponge block into a polyurethane sponge sheet with a thickness of 15mm, place the double-sided tape between the polyurethane sponge sheet and the melamine sponge sheet, and then Carry out hot-pressing compounding to obtain a semi-finished product of the sound-absorbing composite material; the temperature of the hot-pressing compounding is 50°C, the pressure is 5MPa, and the time is 60s;

[0065] The semi-finished melamine sponge of the sound-absorbing composite material is back-coated with adhesive to form an adhesive layer with a thickness of 0.05mm, which is then slit and trimmed by a slitting machine to obtain a finished sound-absorbing composite material, melamine sponge The thickness ratio to polyurethane sponge...

Embodiment 2

[0073] Peel the melamine sponge block into a melamine sponge sheet with a thickness of 10mm, peel the polyurethane sponge block into a polyurethane sponge sheet with a thickness of 25mm, place the double-sided tape between the polyurethane sponge sheet and the melamine sponge sheet, and then carry out Hot-pressing and compounding to obtain a semi-finished product of the sound-absorbing composite material; the temperature of the hot-pressing compounding is 80°C, the pressure is 1MPa, and the time is 20s;

[0074] The semi-finished melamine sponge of the sound-absorbing composite material is back-coated with adhesive to form an adhesive layer with a thickness of 0.05mm, which is then slit and trimmed by a slitting machine to obtain a finished sound-absorbing composite material, melamine sponge The thickness ratio to polyurethane sponge is 1:2.5.

[0075] After the sound-absorbing composite material is obtained, its sound-absorbing performance is tested according to the method de...

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Abstract

The invention provides a sound-absorbing composite and a preparation method of the sound-absorbing composite. The method comprises the steps of placing a double-faced adhesive tape between a polyurethane sponge and a melamine sponge, conducting hot pressing composition, obtaining a semifinished sound-absorbing composite, coating an adhesive on the melamine sponge of the semifinished sound-absorbing composite, and obtaining the sound-absorbing composite after an adhesive layer is formed, wherein the thickness ratio of the melamine sponge to the polyurethane sponge is 1:1.5-1:5. The sound-absorbing composite is prepared by hot pressing composition with the polyurethane sponge and the melamine sponge, so that the sound-absorbing composite has a smaller density and an excellent sound absorption reduction performance, and the effective noise reduction treatment can be conducted relative to the noise spectrum characteristic by adjusting the thickness ratio of the melamine sponge to the polyurethane sponge. In addition, the sound-absorbing composite is small in heat conductivity and has an excellent thermal insulation property, and the effective utilization ratio of energy sources can be increased when the sound-absorbing composite is used for vehicle-mounted air conditioners and air duct systems.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a sound-absorbing composite material and a preparation method thereof. Background technique [0002] With the development of my country's transportation industry and the improvement of people's living standards, people have put forward higher and higher requirements for the ride comfort of vehicles. However, in the field of rail vehicles and commercial passenger vehicles, the noise problems of on-board air conditioners and their air duct systems affect the comfort of the entire car, such as compressor noise and aerodynamic noise that are continuously transmitted to the car through the air duct system. Therefore, the research on noise reduction or sound absorption of vehicles is becoming more and more important. [0003] At present, the prior art discloses a variety of noise reduction methods. For example, the Chinese patent document with the authorization announcemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F13/24B32B5/18B32B37/12B32B37/06B32B37/10
Inventor 徐波谭亮红罗仡科郭名中姜莹黄磊张凤桥
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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