A piezoelectric thin film rapid stretching process

By employing a semi-solid roller and a slanted vertical stretching unit, combined with an anti-slip layer and high-pressure polarization treatment, the problems of low production efficiency and uneven quality of PVDF piezoelectric films have been solved, enabling efficient and rapid preparation of high-performance piezoelectric films.

CN120962981BActive Publication Date: 2026-09-04SUZHOU LEANSTAR ELECTRONICS TECH
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Patent Information

Application Number
CN202510955688.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-07-11
Publication Date
2026-09-04
Estimated Expiration
2045-07-11

AI Technical Summary

Technical Problem

Existing PVDF piezoelectric film stretching processes suffer from low production efficiency, uneven film quality, and high energy consumption, making it difficult to achieve efficient and rapid preparation of high-performance films.

Method used

A stretching unit with a semi-solid roller and an inclined vertical structure, combined with a silicone or rubber anti-slip layer, enables rapid stretching, controls the stretching rate and temperature, and, in conjunction with high-voltage polarization treatment, prepares piezoelectric films.

Benefits of technology

This improved stretching speed and film production efficiency, ensured high β phase content, avoided film slippage and wrinkling, reduced energy consumption, and enabled efficient and rapid preparation of high-quality PVDF piezoelectric films.

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Abstract

The application discloses a kind of piezoelectric film fast stretching process, including the steps of precursor processing, granulation preparation, extrusion molding, fast stretching, high pressure polarization and winding into warehouse.The application can effectively improve the stretching speed and reduce energy consumption by replacing the traditional solid roller with a semi-solid stretching roller to reduce the self-weight.Secondly, the stretching unit with inclined vertical structure and the silicone or rubber anti-slip layer coated on the surface of the semi-solid stretching roller can not only compensate for the film slipping and high system tension problems that occur during high-speed stretching of horizontal and vertical structures respectively, but also further reduce the slipping effect by increasing the friction, effectively avoiding potential film wrinkles, uneven stretching hazards and equipment energy consumption defects.In addition, the high stretching rate can effectively prevent the recovery of the oriented PVDF molecular chain, thereby achieving efficient and fast preparation of piezoelectric film in the actual production process.
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