Method for preparing pyroelectric polymer film based on combined process of solution casting and uniaxial stretching
US10730226B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Feb 11, 2018 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | Sep 16, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N15/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for preparing a pyroelectric polymer film based on a combined process of solution casting and uniaxial stretching is disclosed. The pyroelectric polymer film is firstly prepared by solution casting, afterwards, the casted film is subjected to uniaxial stretching when the film is in a semi-cured state (wet film). Thus a larger stretching ratio (>10) at a lower temperature (even at room temperature) is realized. Without undergoing a further poling process, the as-stretched film does have a fairly, good pyroelectric performance. Moreover, the surface of the stretched film is smoother and has fewer surface defects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.