Electret sheet
AssigneeSekisui Chemical Co., Ltd.
InventorsTetsuhiro Kato, Nobuto Kamiya, Masahiro Tsuchiya, Yuuta Katsurayama, Yasuyuki Shirasaka
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Abstract
The present invention provides an electret sheet that exhibits excellent piezoelectricity even by light stress. The electret sheet of the invention is characterized by including a charged porous sheet, in which the electret sheet has a compressive elastic modulus of 80 to 300 MPa when compressively deformed at 25° C. and a 50% compression stress of 120 to 300 kPa at 25° C., and thus has the excellent piezoelectricity for light stress and exhibits the excellent piezoelectricity even by light stress (0.5N or less) caused by a pulse wave or a breathing.
Claims7
An electret sheet comprising a charged porous sheet, the electret sheet having a compressive elastic modulus of 80 to 300 MPa when the electret sheet is compressively deformed at 25° C. and a 50% compression stress of 120 to 300 kPa at 25° C., and
- wherein the electret sheet excludes a low-density polyethylene resin.
An electret sheet comprising a charged porous sheet, the electret sheet having a compressive elastic modulus of 80 to 300 MPa when the electret sheet is compressively deformed at 25° C. and a 50% compression stress of 120 to 300 kPa at 25° C., and
- wherein the charged porous sheet consists of a polypropylene-based resin.
Dependencies are inferred from the claim text.