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Polyurethane composite acoustic packaging material and preparing method thereof

A packaging material and polyurethane technology, which are applied in the field of polyurethane composite acoustic packaging materials and their preparation, can solve problems such as poor low-frequency sound absorption performance, and achieve the effects of good sound insulation performance, improved low-frequency sound absorption characteristics, and low preparation cost.

Inactive Publication Date: 2016-06-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problem of poor low-frequency sound absorption performance of existing sound-absorbing materials, and to provide a polyurethane composite acoustic packaging material and its preparation method

Method used

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  • Polyurethane composite acoustic packaging material and preparing method thereof
  • Polyurethane composite acoustic packaging material and preparing method thereof
  • Polyurethane composite acoustic packaging material and preparing method thereof

Examples

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preparation example Construction

[0030] The present invention optimizes its low-frequency sound absorption performance by adding bamboo leaf fragments or bamboo leaf straws with different sizes and contents. The steps of the preparation method of a polyurethane composite acoustic packaging material described in the present invention are as follows:

[0031] 1. Mix 60 parts of polyether polyol 330N, 40 parts of polyether polyol 3630, 3 parts of foaming agent deionized water, 3 parts of foaming agent triethanolamine, 5 parts of foaming agent fluorodichloroethane or HCFC- 141b, 0.04 part of catalyst A1, 1 part of catalyst A33 and 0.9 part of foam stabilizer silicone oil were mixed in a plastic cup, stirred at room temperature with an electric mixer at a speed of 1200 rpm, and stirred for 5 minutes to 8 minutes to obtain mixture I;

[0032] 2. Add 2-8 parts of 1mm-2mm bamboo leaf fragments or 2-8 parts of 2mm-3mm bamboo leaf fragments or 2-8 parts of 3mm-4mm bamboo leaf straws into the mixture I obtained in step 1...

Embodiment 1

[0037] The steps of a method for preparing a polyurethane composite acoustic packaging material are as follows:

[0038]1. Make 4 parts of the formula with exactly the same components and contents: 60 grams of polyether polyol 330N, 40 grams of polyether polyol 3630, 3 grams of deionized water, 3 grams of triethanolamine, 5.0 grams of HCFC-141b, 0.04 grams of A1 1, 1 gram of A33 and 0.9 gram of silicone oil were mixed and added to 4 identical plastic cups, and stirred at room temperature with an electric stirrer at a speed of 1200 rpm for 5 to 8 minutes to obtain mixture I;

[0039] 2. Add 2 grams, 4 grams, 6 grams and 8 grams of bamboo leaf fragments of 1 to 2 mm into the 4 plastic cups in step 1, and then use an electric mixer at a speed of 1200 rpm to fully stir for 5 to 8 minutes to obtain mixture II ;

[0040] 3. Add 4 parts of 35 grams of modified MDI to the 4 plastic cups in step 2, and use an electric mixer to stir quickly at a speed of 3000 rpm until uniform to obtai...

Embodiment 2

[0045] The steps of a method for preparing a polyurethane composite acoustic packaging material are as follows:

[0046] 1. Make 4 parts of the formula with exactly the same components and contents: 60 grams of polyether polyol 330N, 40 grams of polyether polyol 3630, 3 grams of deionized water, 3 grams of triethanolamine, 5.0 grams of HCFC-141b, 0.04 grams of A1 , 1 gram of A33, 0.9 gram of silicone oil were mixed and added to 4 identical plastic cups, and stirred with an electric stirrer at a speed of 1200 rpm for 5 to 8 minutes at room temperature to obtain mixture I;

[0047] 2. Add 2 grams, 4 grams, 6 grams and 8 grams of bamboo leaf fragments of 2 to 3 mm into the 4 plastic cups in step 1, and then use an electric mixer at a speed of 1200 rpm to fully stir for 5 to 8 minutes to obtain mixture II ;

[0048] 3. Add 4 parts of 35 grams of modified MDI to the 4 plastic cups in step 2, and use an electric mixer to stir quickly at a speed of 3000 rpm until uniform to obtain m...

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Abstract

The invention discloses a polyurethane composite acoustic packaging material and a preparing method thereof to solve the problem of the prior art that the low-frequency sound absorption performance of a sound absorption material is poor. The polyurethane composite acoustic packaging material comprises, by mass, 60 parts of polyether polyol 330 N, 40 parts of polyether polyol 3630, 35 parts of isocyanate modified MDI, 3 parts of foaming agent deionized water, 3 parts of foaming agent triethanolamine, 5 parts of foaming agent dichlorofluoroethane (HCFC-14lb), 0.04 part of catalyst A1, 1 part of catalyst A33, 0.9 part of foam stabilizer silicone oil, and 2-8 parts of 1-2 mm bamboo leaf chip, or 2-8 parts of 2-3 mm bamboo leaf chip or 2-8 parts of 3-4 mm bamboo leaf straw, wherein one mass part is a mass unit, namely gram or kilogram. The invention further discloses a preparing method of the polyurethane composite acoustic packaging material.

Description

technical field [0001] The invention relates to an acoustic packaging material belonging to the field of sound-absorbing material design, more precisely, the invention relates to a polyurethane composite acoustic packaging material and a preparation method thereof. Background technique [0002] The noise inside the car affects the comfort of the car and also affects the health of the drivers and passengers. The acoustic packaging of the vehicle is an important part that affects the acoustic characteristics of the vehicle interior. The use of acoustic packaging materials can not only reduce the noise in the vehicle, but also adjust the sound quality in the vehicle to meet the comfort requirements in the vehicle. [0003] Polyurethane foam is a new type of acoustic packaging material. It not only has the damping sound absorption mechanism of flexible materials, but also has the sound absorption mechanism of porous materials. It has good sound absorption and insulation performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08J9/08C08J9/14C08L75/08C08L97/02
CPCC08G18/4804C08J9/08C08J9/144C08J2203/204C08J2375/08C08J2497/02C08L75/08C08L2201/06C08L2203/14C08L97/02
Inventor 陈书明姜洋王连会王登峰陈静张继修郭晗
Owner JILIN UNIV
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