A kind of sound-absorbing material and its preparation process

A technology of sound-absorbing materials and preparation technology, which is applied in the field of sound-absorbing materials, can solve problems such as low-temperature sound-absorbing efficiency, and achieve the effects of improving low-temperature sound-absorbing efficiency, improving low-temperature sound-absorbing efficiency, and expanding the sound-absorbing frequency range

Active Publication Date: 2018-03-23
HUBEI XIANGYUAN NEW MATERIAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of poor low-temperature sound-absorbing efficiency in the prior art, and provide a sound-absorbing material that can effectively improve low-temperature sound-absorbing efficiency and its preparation process

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0019] A preparation process for the sound-absorbing material, comprising the following steps in sequence:

[0020] Step 1. First add PE resin, foaming agent A, foaming agent B, foaming agent C, stabilizer, foaming accelerator and color masterbatch into a high-speed mixer according to the required ratio to obtain a mixture, and then mix the The compound is sent into the extruder for extrusion and granulation;

[0021] Step 2: Use an electron accelerator to irradiate and cross-link the granulated mixture, and then send it to a heat dryer for foaming.

[0022] In said step 1, the mixing temperature is 60-80°C, the mixing time is 10-30min, and the extrusion and granulation temperature is 100-150°C;

[0023] In the second step, the irradiation dose is 4-8 Mrad, and the foam molding temperature is 200-250°C.

[0024] The PE resin is low-density polyethylene, the stabilizer is a block copolymer of dimethylpolysiloxane and polyether, and the foaming accelerator is zinc salt.

[00...

Embodiment 1

[0034] A sound-absorbing material, its raw material composition and weight ratio are: PE resin 70, foaming agent A 1, foaming agent B 1, foaming agent C 1, stabilizer 1, foaming accelerator 1, color masterbatch Granule 5, wherein, the PE resin is low-density polyethylene, the foaming agent A is an ADC foaming agent, the foaming agent B is a DPT foaming agent, and the foaming agent C is sodium bicarbonate, The stabilizer is a block copolymer of dimethyl polysiloxane and polyether, and the foam accelerator is zinc salt.

[0035] A preparation process for the sound-absorbing material, comprising the following steps in sequence:

[0036] Step 1. First, add PE resin, foaming agent A, foaming agent B, foaming agent C, stabilizer, foaming accelerator and color masterbatch into a high-speed mixer according to the required proportion and mix at 80°C for 10 minutes to obtain Mixing material, and then feeding the mixing material into an extruder to extrude and granulate at 100-150°C;

...

Embodiment 2

[0040] Step is with embodiment 1, and difference is:

[0041] The raw material composition and weight ratio of the sound-absorbing material are: PE resin 90, foaming agent A 10, foaming agent B 10, foaming agent C 10, stabilizer 5, foaming accelerator 5, color masterbatch 20.

[0042] In the first step, the mixing temperature is 60°C, the mixing time is 30min, and the extruding and pelletizing temperature is 100-150°C;

[0043] In the second step, the irradiation dose is 8 Mrad, and the foam molding temperature is 250°C.

[0044] The sound absorption coefficient of the sound absorption material prepared by using this embodiment is 0.90 at the expected frequency of 100-5000 Hz, and the sound absorption coefficient of 0.40 at the low frequency range of 100-200 Hz.

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Abstract

A sound absorption material is prepared from, by weight, 70-90 parts of PE resin, 1-10 parts of foaming agent A, 1-10 parts of foaming agent B, 1-10 parts of foaming agent C, 1-5 parts of stabilizer, 1-5 parts of foaming accelerant and 5-20 parts of color master batch, wherein the foaming agent A is ADC foaming agent, the foaming agent B is DPT foaming agent, and the foaming agent C is sodium bicarbonate. In preparation, all the raw materials are mixed at a high speed according to the required ratio and then extruded and granulated, then irradiation crosslinking is conducted on the raw materials through an electron accelerator, and the raw materials are sent into a thermal drying machine to be foamed and formed. The sound absorption frequency range is expanded, and the sound absorption rate of expected frequency and low frequency is increased.

Description

technical field [0001] The invention belongs to the technical field of sound-absorbing materials, and in particular relates to a sound-absorbing material and a preparation process thereof. Background technique [0002] When a sound wave propagates in a certain space (indoor or pipe) and is incident on a material or structural wall, part of the sound energy is reflected and the other part is absorbed (including transmission). Due to this absorption characteristic, the reflected sound energy is reduced, thereby reducing the noise. Such materials and structures with sound-absorbing properties are called sound-absorbing materials and sound-absorbing structures. The sound absorption principle of porous sound-absorbing materials: There are a large number of fine pores inside the porous material, and the pores are connected to each other, and the pores penetrate deep into the material and communicate with the outside world through the surface. When the sound wave is incident on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L83/12C08J9/10C08J9/08C08J3/28C08J3/24
CPCC08J3/246C08J3/28C08J9/08C08J9/103C08J9/107C08J2203/02C08J2203/04C08J2203/204C08J2323/06C08J2483/12C08L23/06C08L2203/14C08L2207/066C08L83/12
Inventor 胡志伟陈蓉
Owner HUBEI XIANGYUAN NEW MATERIAL TECH INC
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