Laminated film and method for making a laminated film
AssigneeMobil Oil Corporation
InventorsRudolph Vander Velden, Ralph J. Weber
Life of this patent
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Abstract
A multilayer laminated structure comprising an olefin film, preferably a polypropylene film having on a first side, of the olefin film, a highly printable blend of (A) alkylene acrylate copolymer and (B) an interpolymer of an alkyl acrylate, an alkyl methacrylate and an alkyl acrylate acid and a woven or nonwoven reinforcement laminated to a second side of the olefin film. The laminated structure is suitable for envelope stock, packaging film and label stock.
Claims21
A multilayer film comprising:
- (1) a base structure comprising an olefin polymer film;
- (2) on a first side of the olefin polymer film, a blend of (A) one or more alkylene acrylate copolymers having an alkylene group of 2-6 carbon atoms and alkyl ester group of 1-8 carbon atoms and (B) an interpolymer of (a) from about 2.5 to about 6 parts by weight an alpha-beta monoethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid and mixtures thereof and (b) from about 97.5 to about 94 parts by weight of neutral monomer esters, said neutral monomer esters comprising (1) methyl acrylate or ethyl acrylate and (2) methyl methacrylate;
- and
- (3) on a second side of the olefin polymer film which opposes the first side of the film, a reinforcement adhered thereto.
A multilayer film comprising a base structure comprising an oriented polypropylene film having on one side thereof a blend of (A) one or more alkylene acrylate copolymer, and (B) an interpolymer of (a) from 2.5 to about 6 parts by weight of an alpha-beta monoethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid and mixtures thereof and (b) from about 97.5 to about 94 parts by weight of neutral monomer esters, said neutral monomer esters comprising (1) methyl acrylate or ethyl acrylate and (2) ethyl methacrylate, said interpolymer comprising from about 30% to about 55% by weight of methyl methacrylate when said alkyl acrylate is methylacrylate, and from about 52.5% to about 69% by weight of methyl methacrylate when said alkyl acrylate is ethylacrylate;
- said mixture containing inert inorganic fillers;
- and on a second side of the olefin polymer film, a woven or nonwoven polypropylene reinforcement adhered thereto.
A method of making a multilayered film comprising the steps of:
- (1) applying to a base structure comprising an olefin polymer film, a blend of (A) one or more alkylene acrylate copolymers having an alkylene group of 2-6 carbon atoms and alkyl ester group of 1-8 carbon atoms and (B) an interpolymer of (a) from about 2.5 to about 6 parts by weight an alpha-beta monoethylenically unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid and mixtures thereof and (b) from about 97.5 to about 94 parts by weight of neutral monomer esters, said neutral monomer esters comprising (1) methyl acrylate or ethyl acrylate and (2) methyl methacrylate;
- and
- (2) adhering, on a second side of the olefin polymer film which opposes the first side of the film, a reinforcement film.
Dependencies are inferred from the claim text.