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Mobile phone noise reduction cover material and preparation method thereof

A technology of a muffler cover and a mobile phone, which is applied in the field of polymer materials, can solve the problems of poor sound insulation effect, influence, and the other party cannot hear the sound clearly, and achieves the effects of excellent sound insulation effect, cost reduction, and excellent physical and chemical properties.

Inactive Publication Date: 2014-10-08
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you run out of the room again and again to answer the phone, it will also affect others
Or in a noisy environment, when you answer the phone, the other party cannot hear your voice clearly
[0005]Therefore mobile phone noise-absorbing materials are needed to solve the above problems. The existing invention is a sound-proof mask (CN 101184118B). poor sound insulation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A material for a mobile phone noise reduction cover is prepared by the following method:

[0034] Weigh 100 parts of random copolymerized polypropylene resin, 120 parts of ethylene-vinyl acetate copolymer, 5 parts of N,N'-dimethyl-N,N'-dinitrosoterephthalamide, Y-chlorine 3 parts of propyltriethoxysilane, 3 parts of barium stearate, 5 parts of tris(2,4-di-tert-butylphenyl) phosphite, stirred in the high-speed mixer for 3 minutes, and then fed into In the twin-screw extruder; the particle size is 0.1 micron at the first exhaust port of the twin-screw extruder, and the true density is 0.4g / cm 3 , bulk density 0.26g / cm 3 60 parts of hollow microspheres, under the conveying, shearing and mixing of the screw, the material is melted and compounded, and then extruded, drawn, and pelletized to obtain the material of the mobile phone noise reduction cover, which is made into a sound insulation cover by injection molding .

[0035] The temperature of the twin-screw extruder fr...

Embodiment 2

[0038] A material for a mobile phone noise reduction cover is prepared by the following method:

[0039] Take by weighing 30 parts of butadiene-styrene-acrylate copolymer with 50% butadiene content, 70 parts of PC resin whose melt index is 9g / 10min, 120 parts of ethylene-vinyl acetate copolymer, azobisisobutyl 8 parts of nitrile, 1 part of vinyltrimethoxysilane, 2 parts of calcium stearate, 8 parts of tris(2,4-di-tert-butylphenyl) phosphite, after stirring in a high-speed mixer for 3~5min, It is sent into the twin-screw extruder through the metering device; the particle size is 50 microns and the true density is 0.6g / cm2 at the first exhaust port of the twin-screw extruder. 3 And the bulk density is 0.4g / cm 3 70 parts of hollow glass beads, under the conveying, shearing and kneading of the screw, the material is melted and compounded, and then extruded, drawn, and pelletized to obtain the material of the mobile phone noise reduction cover, which is made into a sound insulati...

Embodiment 3

[0042] A preparation method of the above-mentioned mobile phone noise reduction cover material:

[0043] Weigh 200 parts of polyethylene resin, 110 parts of EPDM rubber, 0.1 part of azobisisobutyronitrile, 8 parts of long-chain alkyltrimethoxysilane, 10 parts of zinc stearate, β-(4-hydroxy- 10 parts of 3,5-di-tert-butylphenyl) n-octadecyl propionate, after stirring 4min in the high-speed mixer, send in the twin-screw extruder through metering device; The first exhaust port adds a particle size of 400 microns and a true density of 2.5g / cm 3 And the bulk density is 1.2g / cm 3 70 parts of hollow glass beads, under the conveying, shearing and kneading of the screw, the material is melted and compounded, and then extruded, drawn, and pelletized to obtain the material of the mobile phone noise reduction cover, which is made into a sound insulation cover by injection molding .

[0044] The temperature of the twin-screw extruder from the feed port to the extrusion die is 160°C, 170...

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Abstract

The invention discloses a mobile phone noise reduction cover material which is prepared from the following components in parts by weight: 100-300 parts of thermoplastic resin, 60-70 parts of cenosphere,100-120 parts of elastomer, 0.1-10 parts of foaming agent, 0.5-8 parts of coupling agent, 0.5-10 parts of lubricant and 0.1-10 parts of antioxidant. The mobile phone noise reduction cover material is relatively light in weight and can be carried over; the material is excellent in physical and chemical property and mechanical property and can meet complex formation and structures; after being subjected to injection molding, the material can be used in match with conventional ordinary headsets, then no extra headsets need to be bought, and the cost of a product is lowered. The product is excellent in sound insulation effect, can effectively ensure the talking quality in a noisy environment, or can be used for making calls in a meeting room or library without walking outside the room or interfering other people.

Description

[0001] technical field [0002] The invention belongs to the field of macromolecule materials, and relates to a mobile phone noise reduction cover material and a preparation method thereof. [0003] Background technique [0004] When people are in the library or conference room and need to answer an urgent call, it will affect other people's study or work. If you run out of the room to answer the phone again and again, it will also affect others. Or in a noisy environment, when you answer the phone, the other party cannot hear your own voice clearly. [0005] Therefore need to have mobile phone sound-absorbing material to solve the above problem, existing invention is sound-proof mouth mask (CN 101184118B), and its shortcoming is to rely on elastic band to be fixed on the ear to sound-proof, and its sound-proof effect is not good. The present invention relies on the hand to fix the noise-absorbing mask of the mobile phone on the mouth, which is more firmly fixed and the g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/08C08L69/00C08L47/00C08L23/06C08L23/16C08L77/02C08L25/06C08L71/12C08L67/02C08K13/04C08K7/22C08K7/28C08J9/10
CPCC08L23/0853C08K2201/003C08L23/00C08L23/06C08L23/12C08L23/16C08L25/06C08L47/00C08L67/00C08L67/02C08L69/00C08L71/12C08L77/00C08L77/02C08L2205/03C08L2205/035
Inventor 杨桂生赵陈嘉
Owner HEFEI GENIUS NEW MATERIALS
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