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Polyvinyl alcohol fiber reinforced polyurethane composite acoustic material and preparation method thereof

A technology of polyvinyl alcohol fibers and acoustic materials, which is applied in the field of acoustic packaging materials in the field of sound absorbing material design, can solve problems such as poor low-frequency sound absorption, and achieve the effects of improving low-frequency sound absorption characteristics and low preparation cost

Active Publication Date: 2020-11-03
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a polyvinyl alcohol fiber reinforced polyurethane composite acoustic material capable of improving the sound absorption characteristics of the polyurethane composite acoustic packaging material in the low-frequency range and a preparation method thereof, which solves the poor absorption of low-frequency sound by the existing sound-absorbing materials The problem

Method used

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  • Polyvinyl alcohol fiber reinforced polyurethane composite acoustic material and preparation method thereof
  • Polyvinyl alcohol fiber reinforced polyurethane composite acoustic material and preparation method thereof
  • Polyvinyl alcohol fiber reinforced polyurethane composite acoustic material and preparation method thereof

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preparation example Construction

[0027] refer to figure 1 , a kind of preparation method of the polyvinyl alcohol fiber reinforced polyurethane composite acoustic material, described method comprises the following steps:

[0028] Step 1. Mix 60 parts of polyether polyol 330N, 40 parts of polyether polyol 3630, 3 parts of foaming agent deionized water, 3 parts of triethanolamine, 0.05 parts of catalyst A1, 1 part of catalyst A33 and 1.8 parts of foam stabilizer silicone oil Mix in a plastic cup, stir with an electric mixer at a speed of 1200 rpm at room temperature, and stir for 5 to 8 minutes to obtain mixture I;

[0029] Step 2. Add 0.1 to 0.6 parts of polyvinyl alcohol fibers to the mixture I obtained in step 1, and then use an electric mixer to stir fully at a speed of 1200 rpm for 5 to 8 minutes to obtain mixture II;

[0030] Step three, adding 35 parts of 4,4'-diphenylmethane diisocyanate into the mixture II obtained in step two;

[0031] Step 4. Quickly pour the mixture III obtained in step 3 into the...

Embodiment

[0034] A polyvinyl alcohol fiber-reinforced polyurethane composite acoustic material, the material is composed of the following components in mass fraction ratio:

[0035]

[0036] The polyvinyl alcohol fiber is 5-10 mm in length.

[0037] A preparation method of polyvinyl alcohol fiber reinforced polyurethane composite acoustic material, said method comprising the following steps:

[0038] Step 1, 6 parts of the formula with the same components and contents: 60g polyether polyol 330N, 40g polyether polyol 3630, 3g blowing agent deionized water, 3g triethanolamine, 0.05g catalyst A1, 1g catalyst A33 and Mix 1.8g of foam stabilizer silicone oil into 6 identical plastic cups, stir with an electric mixer at a speed of 1200rpm at room temperature, and stir for 5 to 8 minutes to obtain mixture I;

[0039] Step 2. Add 0.1g, 0.2g, 0.3g, 0.4g, 0.5g and 0.6g of polyvinyl alcohol fibers into the 6 mixtures I obtained in step 1, and stir again with an electric mixer at a speed of 120...

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Abstract

The invention belongs to acoustic packaging materials in the field of design of sound absorption materials and particularly relates to a polyvinyl alcohol fiber reinforced polyurethane composite acoustic material and a preparation method thereof. The material is prepared from components in parts by mass as follows: 60 parts of polyether polyol 303N, 40 parts of polyether polyol 3630, 35 parts of 4,4-diphenylmethane diisocyanate, 3 parts of a defoamer deionized water, 3 parts of a defoamer triethanolamine, 0.05 parts of a catalyst A1, 1 part of a catalyst A33, 1.8 parts of a foam stabilizer and 0.1-0.6 parts of polyvinyl alcohol fibers. By means of the polyvinyl alcohol fiber reinforced polyurethane composite acoustic material and the preparation method thereof, the sound absorption characteristic of the polyurethane composite packaging acoustic material in a low-frequency range can be improved, and the problem that the conventional sound absorption materials have a poor absorption effect on low-frequency sound is solved.

Description

technical field [0001] The invention belongs to the acoustic packaging material in the field of sound-absorbing material design, in particular to a polyvinyl alcohol fiber reinforced polyurethane composite acoustic material and a preparation method thereof. Background technique [0002] With the vigorous development of various departments such as modern industry, construction industry and transportation industry, noise pollution has seriously affected people's health, work and life. In addition, with the continuous improvement of people's living standards, the demand for cars has gradually increased from the initial means of transportation to a comfortable mobile space, so the mechanical properties and comfort performance of the car itself have become important standards for measuring the quality of cars, among which car noise is an important criterion. [0003] Automotive acoustic packaging, in a narrow sense, refers to the sum of various sound-absorbing and sound-insulati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08L29/04C08L83/04C08G18/48C08G18/76C08G18/32C08G18/66
CPCC08G18/3281C08G18/4804C08G18/6688C08G18/7671C08G2350/00C08L75/08C08L2203/14C08L2205/03C08L2205/16C08L29/04C08L83/04
Inventor 陈书明朱彤彤朱文波王业斌王登峰
Owner JILIN UNIV
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