Masking films containing light shielding peelable layer utilizin

Details Masking films containing light shielding peelable layer utilizin Masking films containing light shielding peelable layer utilizin

1996-10-11

1999-01-12

Young, Christopher G.

Radiation imagery chemistry: process, composition, or product th

Radiation modifying product or process of making

Radiation mask

428412, 4284735, 4284763, 428483, 428500, 428522, G03F 900, B32B 2700

Patent

active

058585796

ABSTRACT:
A masking film comprises a light-shielding peelable layer which is provided on a transparent support and comprises a polymer binder comprising a vinyl chloride resin, a rubberlike resin and a thermoplastic resin having OH groups and being compatible with the rubberlike resin and the vinyl chloride resin, wherein the polymer binder comprises a mixed nitrile rubber of a nitrile rubber having an acrylonitrile content of about 33% by weight and a Mooney viscosity of about 50 to 90 and another nitrile rubber either having an acrylonitrile content of about 28 to 32% by weight and a Mooney viscosity of about 35 to 70 or having an acrylonitrile content of about 33% by weight and a Mooney viscosity of about 35 to 50. The masking film simultaneously exhibits appropriate flexibility, good pick-up property, peelability and anti-blocking property of the light-shielding peelable layer and is stable against degradation of these properties with time.

REFERENCES:
patent: 4923727 (1990-05-01), Maruyama et al.
patent: 5043198 (1991-08-01), Maruyama et al.

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