Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1983-11-08
1986-11-18
McCamish, Marion C.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
428397, C07C 324
Patent
active
046234381
ABSTRACT:
Continuous processes for the preparation of electrets and the products produced thereby, including filter fabrics, are disclosed. The process employs a continuous film or continuous filaments in the form of a tightly packed warp having a warp density as determined by light transmission of not more than 40%. The continuous film or continuous filament in the form of a tightly packed warp are continuously fed one or more times through a corona charging station having electrodes disposed on both sides of the material being treated, the material being treated being simultaneously heated while being subjected to a corona discharge of from 6 KV to 20 KV direct current.
REFERENCES:
patent: 4308223 (1980-03-01), Stern
patent: 4375718 (1981-03-01), Wadsworth
Felton Clinton D.
Gibson Baylor D.
Jamison Charles E.
McWhorter William O.
Serad George A.
Celanese Corporation
McCamish Marion C.
Stine Forrest D.
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