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TPEE acoustic film and preparation method thereof

A thin film and acoustic technology, applied in the field of TPEE acoustic thin film and its preparation, can solve the problems of complex thin film preparation process, increased thin film radius, low low frequency response, etc., and achieves the effect of reducing cost, good acoustic properties, and good mechanical properties

Inactive Publication Date: 2020-02-21
李昌龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

FP microphone film does not require it to be piezoelectric or capacitive, and various materials can be used to prepare acoustic films, such as silver film, silicon film, graphene film, polymer film, sugar-based film, etc.; the sensitivity of the acoustic film and the thickness of the film It is inversely proportional to the cube of the film radius and proportional to the fourth power of the film radius; considering the size of the sensor, the thickness of the acoustic film is often relatively small. At the micron or even nanometer level, it is difficult to increase the radius of the film, and the preparation process of the film is also complicated. High cost, low response to low frequency, the preparation of acoustic film is a difficult point in the development of acoustic sensors

Method used

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  • TPEE acoustic film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Composition of raw materials (parts by weight): 100 parts of modified TPEE sheets, 1 part of diphenylamine and 2 parts of coupling agent A. The coupling agent A is KH560.

[0035] Preparation of modified TPEE sheet

[0036]Composition of raw materials (parts by weight): 100 parts of TPEE resin, 20 parts of polybutylene terephthalate, 10 parts of polyether sulfone, 5 parts of nano calcium carbonate, 2 parts of nano aluminum oxide, 1 part of cardanol, poly 10 parts of formaldehyde, 0.001 parts of cross-linking curing agent and 10 parts of composite coupling agent B. Described composite coupling agent B comprises common silane coupling agent and the silane coupling agent that has amino compound, and the mass ratio of described common silane coupling agent and the silane coupling agent that has amino is 5:2, and described The common silane coupling agent is KH560, and the silane coupling agent with amino group is KH550.

[0037] Preparation:

[0038] S1. Mix the composi...

Embodiment 2

[0046] Composition of raw materials (parts by weight): 120 parts of modified TPEE sheets, 3 parts of tris(hexadecanyl alcohol) ester and 7 parts of coupling agent A. The coupling agent A is KH570.

[0047] Preparation of modified TPEE sheet

[0048] Composition of raw materials (parts by weight): 120 parts of TPEE resin, 50 parts of polybutylene terephthalate, 30 parts of polyether sulfone, 10 parts of nano calcium carbonate, 7 parts of nano aluminum oxide, 3 parts of cardanol, poly 15 parts of formaldehyde, 0.005 parts of cross-linking curing agent and 20 parts of composite coupling agent B. Described composite coupling agent B comprises common silane coupling agent and the silane coupling agent that has amino compound, and the mass ratio of described common silane coupling agent and the silane coupling agent that has amino is 5:2, and described The common silane coupling agent is KH570, and the silane coupling agent with amino group is KH550.

[0049] Preparation:

[005...

Embodiment 3

[0058] Composition of raw materials (parts by weight): 105 parts of modified TPEE sheets, 1 part of p-phenylenediamine and 3 parts of coupling agent A. The coupling agent A is KH792.

[0059] Preparation of modified TPEE sheet:

[0060] Composition of raw materials (parts by weight): 105 parts of TPEE resin, 30 parts of polybutylene terephthalate, 15 parts of polyether sulfone, 6 parts of nano calcium carbonate, 3 parts of nano aluminum oxide, 1 part of cardanol, poly 12 parts of formaldehyde, 0.002 parts of cross-linking curing agent and 12 parts of composite coupling agent B. Described composite coupling agent B comprises common silane coupling agent and the silane coupling agent that has amino compound, and the mass ratio of described common silane coupling agent and the silane coupling agent that has amino is 5:2, and described Common silane coupling agent is DL602.

[0061] Preparation:

[0062] S1. Mix the composite coupling agent B into a dilute solution with a conc...

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Abstract

The invention provides a TPEE acoustic film. The TPEE acoustic film is prepared from a modified TPEE sheet, an antioxidant and a coupling agent A; the modified TPEE sheet is prepared from TPEE resin,polybutylene terephthalate, polyethersulfone, nanometer calcium carbonate, nano-alumina, cardanol, polyformaldehyde, a crosslinking curing agent and a composite coupling agent B. The acoustic film prepared by the method has smooth and stable surface, the diameter is 2.15-2.52 mm, and the thickness is 2.7-7.5 [mu]m; and the ratio of the diameter to the thickness of the acoustic film is very large,the acoustic film has excellent acoustic characteristics and has excellent responsivity within the acoustic frequency range of 0.025-25000 Hz, the sensitivity can reach 60-110 mv / pa, and the static pressure sensitivity reaches up to 7 [u]m / pa.

Description

technical field [0001] The invention relates to the technical field of acoustic thin films, in particular to a TPEE acoustic thin film and a preparation method thereof. Background technique [0002] Sound wave is a kind of mechanical wave generated by the vibration of sound source. The space of sound wave propagation is sound field. When sound propagates in gas and liquid medium, it is a longitudinal wave, but it may be mixed with transverse wave when it propagates in solid medium. The frequency of sound waves that can be heard by the human ear is generally between 20 Hz and 20,000 Hz. Below 20Hz is infrasound, above 20kHz is ultrasound. Sound waves in different frequency bands have different uses in practical applications. Infrasound is used in geoacoustic exploration, and ultrasound is used in nondestructive testing and ultrasonic imaging. When the sound wave propagates in the air, it will cause the density of the air to change, causing the air pressure to change periodi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L67/02C08L81/06C08L59/00C08K13/06C08K9/06C08K3/26C08K3/22C08K5/13C08J5/18
CPCC08J5/18C08J2367/00C08J2459/00C08J2467/02C08J2491/06C08K5/13C08K13/02C08K2003/2227C08K2003/265
Inventor 不公告发明人
Owner 李昌龙