Piezoelectric electret film and producing method thereof

A piezoelectric electret and a manufacturing method technology, applied in chemical instruments and methods, lamination, lamination devices, etc., can solve problems such as the inability to achieve fine control of the microstructure of thin films

Inactive Publication Date: 2014-09-17
深圳市明鑫高分子技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, neither of the above two types of preparation methods can achieve fine control of the microstructure of the film.

Method used

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  • Piezoelectric electret film and producing method thereof
  • Piezoelectric electret film and producing method thereof
  • Piezoelectric electret film and producing method thereof

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Embodiment Construction

[0026] The piezoelectric electret thin film of the present invention and its manufacturing method will be further described in detail below mainly in conjunction with the accompanying drawings and embodiments.

[0027] Such as figure 1 with figure 2 Shown, the fabrication method of the piezoelectric electret thin film of one embodiment, comprises the following steps:

[0028] In step S110, fluorinated ethylene propylene copolymer (FEP) films 110 and polytetrafluoroethylene (PTFE) films 120 are alternately stacked together and placed on a substrate 130, wherein the outermost two layers after overlapping are polytetrafluoroethylene (PTFE) films. Vinyl fluoride film 120.

[0029] In this embodiment, the thickness of the fluorinated ethylene propylene copolymer film 110 is 7-15 μm, and the thickness of the polytetrafluoroethylene film 120 is 2-7 μm.

[0030] The quantity of the FEP film 110 can be one layer, or multiple layers, such as two layers, three layers, four layers and...

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Abstract

The invention relates to a producing method of a piezoelectric electret film, and the producing method is as follows: fluorinated ethylene propylene copolymer films and polytetrafluoroethylene films are alternately laminated together, and then placed on a substrate, after the alternate lamination, two outermost layers are the polytetrafluoroethylene films; a latticed pressing plate is arranged on an outermost layer t polytetrafluoroethylene film opposite the substrate, pressure is applied to the pressing plate, the alternately laminated structure of the fluorinated ethylene propylene copolymer films and the polytetrafluoroethylene films is heated, after cooling, the pressing plate and the substrate are removed to obtain the piezoelectric electret film provided with micropores in the middle. In the production process of the piezoelectric electret film, through selection of latticed pressing plates with different specifications, such as regulation of mesh net opening mesh number, wire diameter, shape and other parameters and thermal bonding process parameter of the pressing plates, the fine adjustment of microporous structure of the piezoelectric electret film can be realized, and the producing method is strong in practicability, and can be widely popularized and applied. In addition, the invention also relates to the piezoelectric electret film produced by the producing method.

Description

technical field [0001] The invention relates to the field of functional materials, in particular to a piezoelectric electret film and a manufacturing method thereof. Background technique [0002] Piezoelectric electret thin films show broad application prospects in communication, security, control, life science and military due to their good flexibility, large-area film formation, and low production cost. Among the traditional piezoelectric electret materials, polypropylene (PP) piezoelectric electret film has been studied more, and its piezoelectric coefficient d33 is about 20 times higher than that of ferroelectric polymers. There are two main methods for preparing polymer films with closed microporous structure by traditional technology: one is to obtain the material with pore structure through chemical foaming process; The hot-pressing process forms a thin sheet, and a film with a microporous structure is formed during biaxial stretching by taking advantage of the large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/06B32B37/10B32B27/08B32B15/085
Inventor 成鹏张强
Owner 深圳市明鑫高分子技术有限公司
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