Masking films
AssigneeKimoto Co., Ltd.
InventorsSatoshi Ako, Kan Hashizume, Takashi Shimizu
Life of this patent
Estimating the term…
Abstract
A masking film comprising a light-shielding peelable layer provided on a transparent support wherein a binder component of the light-shielding peelable layer comprises 20 to 40% by weight of a rubberlike resin, 25 to 75% by weight of a vinyl chloride resin and 5 to 35% by weight of a thermoplastic resin containing OH groups compatible with the rubberlike resin and the vinyl chloride resin based on total resin components, which maintains anti-blocking property and appropriate adhesion after a long period of time.
Claims13
A masking film having long-life adhesiveness and a good anti-blocking property, said masking film comprising a light-shielding peelable layer provided on a transparent support wherein said peelable layer includes a binder component which comprises:
- 20 to 40% by weight of a rubber-like resin,
- 25 to 75% by weight of a vinyl chloride resin and
- 5 to 35% by weight of a thermoplastic resin containing OH groups compatible with the rubberlike resin and the vinyl chloride resin, based on total resin components,
- said thermoplastic resin containing OH groups being selected from the group consisting of phenoxy resins, epoxy resins, polyvinyl acetals, vinyl chloride/vinyl acetate/vinyl alcohol terpolymers and styrene/maleic acid half esters.
A masking film having long-life adhesiveness and a good anti-blocking property, said masking film comprising a light-shielding peelable layer provided on a transparent support wherein said peelable layer includes a binder component which comprises 20 to 40% by weight of a rubber-like resin, 25 to 75% by weight of a vinyl chloride resin and 5 to 35% by weight of a vinyl chloride/vinyl acetate/vinyl alcohol terpolymer compatible with the rubberlike resin and vinyl chloride resin, based on total resin components.
Dependencies are inferred from the claim text.