Coated films with improved barrier properties
AssigneeExxonMobil Oil Corporation
InventorsShaw-Chang Chu, Jay Kin Keung, Tien-Keui Su
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Abstract
A thermoplastic film having a substantially continuous, adherent coating on at least one surface, wherein the coating includes a polymeric binder and nano-scale particles. When the coating is formed on the surface of the film, the nano-scale particles form a barrier that substantially reduces the diffusion of moisture and oxygen. In preferred embodiments, the coating includes a polymeric binder and silicate particles formed on a base substrate layer that includes a polyolefin selected from the group consisting of homopolymers, copolymers, and terpolymers of propylene, ethylene, butylene, and blends thereof.
Claims15
A thermoplastic film comprising a substantially continuous, adherent coating on at least one surface, wherein the coating comprises a first component and a second component, the first component comprises a polymeric binder, the second component comprises nano-scale particles having an average particle size of from about 1 nanometer to about 10 nanometers, and the nano-scale particles comprise from about 3 to about 12 weight percent of the total coating.
A thermoplastic film comprising a substantially continuous, adherent coating on at least one surface, wherein the coating is applied by:
- (a) forming a coating composition by combining a first component and a second component, the first component comprising an aqueous dispersion containing a polymeric binder and the second component comprising an aqueous dispersion containing nano-scale particles having an average particle size of from about 1 to about 10 nanometers;
- (b) applying the coating composition onto at least one surface of the thermoplastic film by gravure coating, roll coating, or spraying;
- and
- (c) drying the coated film or allowing the coated film to dry;
- and wherein the nano-scale particles comprise from about 3 to about 12 weight percent of the total coating of a dried, coated film.
A thermoplastic film comprising a substantially continuous, adherent coating on at least one surface, wherein the coating comprises a first component and a second component, the first component comprises a polymeric binder, the second component comprises nano-scale particles having an average particle size of from about 1 nanometer to about 10 nanometers, the nano-scale particles comprise from about 3 to about 12 wt. percent of the total coating, and the surface of the film is a coextruded layer of a multilayer film.
A thermoplastic film comprising a substantially continuous, adherent coating on at least one surface, wherein the coating is applied by:
- (a) forming a coating composition by combining a first component and a second component, the first component comprising an aqueous dispersion containing a polymeric binder and the second component comprising an aqueous dispersion containing nano-scale particles having an average particle size of from about 1 to about 10 nanometers, the nano-scale particles comprise from about 3 to about 12 wt. percent of the total coating;
- (b) applying the coating composition onto at least one surface of the thermoplastic film by gravure coating, roll coating, or spraying;
- and
- (c) drying the coated film or allowing the coated film to dry;
- and wherein the surface of the film is a coextruded layer of a multilayer film.
Dependencies are inferred from the claim text.