Sheet or web material having antistatic properties

Details Sheet or web material having antistatic properties Sheet or web material having antistatic properties

1991-02-21

1996-02-27

Nakarani, D. S.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428341, 428342, 428448, 428480, 430527, 430536, 430539, B32B 516

Patent

active

054947383

ABSTRACT:
A sheet or web material being a subbed or unsubbed hydrophobic resin support or paper support coated with at least one hydrophobic resin layer and having at least on one side thereof an antistatic layer containing for at least 70% by weight colloidal silica having an average particle size not larger than 10 nm and a surface area of at least 300 m.sup.2 per gram, the colloidal silica being present in said antistatic layer at a coverage of at least 50 mg per m.sup.2, characterized in that said antistatic layer is coated with a covering layer having a smaller sticking power to a gelatin layer than said silica containing layer, said covering layer containing at least 50% by weight of a water-insoluble synthetic polymer being applied at a dry coverage in the range of 0.01 to 2 g/m.sup.2.

REFERENCES:
patent: 4173480 (1979-11-01), Woodward
patent: 5006451 (1991-04-01), Anderson
patent: 5008178 (1991-04-01), Van Thillo

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