Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1985-12-12
1987-01-20
Powell, William A.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
156636, 156640, 156668, 156345, B29C 1708, B44C 122
Patent
active
046378561
ABSTRACT:
An apparatus and process for etching fluoroplastics is disclosed. A fluoroplastic film, sheet or tape is passed under an etchant distribution means comprised of an annularly shaped and hollow main body having a series of openings therethrough. Attached to the main body are a series of annularly shaped hollow extension legs in parallel alignment with one another and in communication with said openings in the main body. Etchant is fed into the main body and by action of gravity flows into and through the hollow channels of the extension legs, exiting at the base of the extension legs, and being distributed evenly onto the side of the fluoroplastic passing under the etching distribution means. The etching distribution means also includes first and second sponge means attached to the main body on opposite sides thereof. The first and second sponge means are positioned so that they are in substantial parallel alignment iwth the fluoroplastic substrate and in contacting relationship with the surface of the fluoroplastic to be etched. The first and second sponge means contain etchant from splashing on the fluoroplastic in the areas other than the etching area. Also, a water distribution means comprising a retaining sponge means is positioned against the underside of the fluoroplastic and includes conduit means in contact with the retaining sponge means for continuous feeding a fresh supply of water which protects the unetched side of the fluoroplastic surface from being accidentially etched due to rollover of etchant.
REFERENCES:
patent: 3411973 (1968-11-01), Siler
patent: 4331503 (1982-05-01), Benjamin
patent: 4359360 (1982-11-01), Harris et al.
patent: 4384917 (1983-05-01), Wensink
Furze Paul
Jernigan Edward L.
Lombardo Frank
Dixon Industries Corporation
Powell William A.
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