Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Loudspeaker acoustic diaphragm based on graphene reinforced PET plastics, and preparation method thereof

A graphene and loudspeaker technology, applied in the direction of loudspeakers, sensors, electrical components, etc., can solve the problems of poor firmness, low strength, and foaming of the diaphragm, and achieve the effect of light weight and small thickness

Inactive Publication Date: 2019-02-26
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the diaphragms made of the above-mentioned various materials have low strength and cannot meet the high-quality requirements of loudspeaker work. Therefore, the diaphragms usually use multiple single-layer diaphragms of the same material or different materials. Adhesives fix and form the structure, but the diaphragm of this multi-layer structure is usually not strong enough, and it is easy to cause film folding and foaming when combined, which affects the stability of the diaphragm

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Loudspeaker acoustic diaphragm based on graphene reinforced PET plastics, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preferred embodiment one is made by in-situ blending method, and the specific operations include the following steps:

[0028] 4A. Swell the graphene or its compound fragments at a temperature ranging from 150°C to 250°C for 2 to 5 minutes, and then disperse the graphene and / or its compound fragments in a polar solvent at room temperature by ultrasonic vibration , making a suspension of graphene and / or its compound fragments mixed with a polar solvent;

[0029] 4B. Inject the suspension of graphene and / or its compound fragments mixed with a polar solvent obtained in the previous step 4A into the powdery or granular polymer PET, and stir rapidly with the help of a mechanical device to form a slurry , and by esterification, obtain the PET macromolecular polymer slurry mixed with graphene and / or its compound fragments, in this slurry, graphene and / or its compound fragments cooperate with macromolecular polymer PET, by weight percentage , graphene and / or its compound fragm...

Embodiment 2

[0032]Preferred embodiment two, is to adopt the solution mixing method to make, and concrete operation comprises the following steps:

[0033] 6A. Disperse graphene and / or its compound fragments in ethanol solvent by ultrasonic vibration method at room temperature to make graphene and / or its compound fragments mixed with ethanol solvent suspension liquid;

[0034] 6B. Disperse the powdery or granular high molecular polymer PET in toluene solvent by ultrasonic vibration method to make PET polymer-toluene solvent mixed solution;

[0035] 6C. Under the condition of rapid mechanical stirring, the suspension of graphene and / or its compound fragments mixed with ethanol solvent obtained from the implementation of the above step 6A is injected into the PET polymer obtained from the implementation of the above step 6B-toluene solvent mixing In the solution, graphene and / or its compound fragments are fully and uniformly dispersed in the PET polymer-toluene solvent mixed solution, and t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a loudspeaker acoustic diaphragm based on graphene reinforced PET plastics, and a preparation method thereof. The diaphragm is a PET plastic film with reinforced by using graphene and / or graphene compound fragments, and is laser-cut or mechanically punched and compression moulded. The basic components of the acoustic diaphragm are counted in percentage by weight, wherein the graphene and / or the graphene compound fragments are 5% to 25%, and the rest is a high molecular polymer PET, that is, polyethylene terephthalate plastic. The diaphragm is prepared by using raw material grade PET as a substrate, and doping the substrate with graphene and / or graphene compound fragments by means of an organic solvent to obtain a reinforced PET plastic film with light weight, highstrength, sufficient rigidity, and high toughness, and then by performing compression moulding on the reinforced PET plastic film by means of laser-cutting or mechanical punching. The reinforced plastic film produced by the preparation method of the invention is applied in a high-quality loudspeaker as the acoustic diaphragm material, and combines the advantages of graphene and PET, so that the prepared loudspeaker diaphragm is made to have rigidity, toughness, impact resistance and abrasion resistance, but small thickness and light weight.

Description

technical field [0001] The present invention relates to an acoustic diaphragm of a high-quality electric-acoustic transducing device and a preparation method thereof, in particular to mixing graphene and / or its compound into raw material grade high molecular polymer PET to make reinforced PET plastic, and then extruding It is a method of cutting or tailoring after the film is made by plastic technology, and molding it into a high-quality acoustic diaphragm. Background technique [0002] The loudspeaker is an electric-acoustic transducer device that converts electrical signals into sound, and its performance has a great influence on the sound quality of the obtained sound. The speaker is the weakest link in sound quality in audio equipment, but it is the most important part for sound effects. There are many types of speakers, and they vary widely in price. The audio current flows through the moving coil, causing it to be subjected to electromagnetic force, or the piezoelect...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04R9/06H04R9/02H04R31/00
CPCH04R9/02H04R9/06H04R31/00H04R2400/11
Inventor 伍守豪余旭
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com