Method of manufacturing high potential electrets

Details Method of manufacturing high potential electrets Method of manufacturing high potential electrets

1982-05-19

1984-04-03

Gallagher, John J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

29592E, 156292, 156311, 307400, 428 76, 428212, 428900, B32B 3120

Patent

active

044405910

ABSTRACT:
A method for producing stable, layered electrets includes the steps of placing a sheet of glassy polymer or copolymer of high molecular weight, such as polyethylene terephthalate, between two, somewhat larger in planform, sheets of polyvinyl chloride and/or polyvinyl acetate formulation, to form a sandwich structure which is then compressed and heated to approximately 300.degree. F. At this temperature the exterior polyvinyl chloride or copolymer sheets are polarized and displaced under pressure over the interior sheet to charge the interfaces of the exterior and interior sheets. The heat, furthermore, bonds the peripheral edges of the larger exterior sheets to each other thus forming a hermetically closed container within which the charged interfaces will reside.

REFERENCES:
patent: 4356049 (1982-10-01), Tamura et al.

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