Corona-discharge treated release films

Details Corona-discharge treated release films Corona-discharge treated release films

1989-08-03

1990-12-18

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204168, 204169, 428391, 428447, 264 22, 26421124, H05F 300, B29C 3510

Patent

active

049784366

ABSTRACT:
Polyolefin coatings and films having release characteristics, also known as release sheets, are disclosed. The release sheets are formed by treating a sheet formed from polyolefin and dimethyl polysiloxane having functional end groups with a corona discharge. In a preferred embodiment, the release sheet is formed from polyolefin, the dimethyl polysiloxane, vinyl silane, an agent to graft the vinyl silane onto the polyolefin and a moisture curing agent by extrusion in the form of sheet, treating the sheet with a corona discharge and then subjecting the sheet to moisture. The release sheets may be used, for instance, as the backing sheet for labels.

REFERENCES:
patent: 2778793 (1957-01-01), Thomas et al.
patent: 3726710 (1973-04-01), Berger et al.
patent: 4288497 (1981-09-01), Tanaka et al.
patent: 4446090 (1984-05-01), Lovgren et al.

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