High polymer electret
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorIsao Sumita
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Abstract
There is provided a high polymer electret mainly composed of at least one member of a group consisting of poly-3,3-bis(chloromethyl)oxacyclobutane, poly-3,3-bis-(fluoromethyl)oxacyclobutane and poly-3,3-bis(bromoethyl)oxacyclobutane.
Claims2
A high polymer electret composed, as main component, of at least one member selected from the group consisting of poly-3,3-bis-(chloromethyl)oxacyclobutane, poly-3,3-bis(fluoromethyl)oxacyclobutane and poly-3,3-bis(bromomethyl)oxacyclobutane, which has been treated by applying thereto a d-c electric field of high intensity at a temperature above room temperature which is gradually reduced to room temperature.
Dependencies are inferred from the claim text.