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US 2016/0236498 A1Published application
Packaging material having moisture barrier and methods for preparing same
AssigneeInternational Paper Company
InventorsDENNIS W. ANDERSON, PATRICIA L. EWING, TIMOTHY J. BRADFORD, MICHAEL J. MURPHY
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Abstract
An article in the form of a packaging material having a water vapor transportation rate of about 500 g/m2/day or less. The packaging material has a paper substrate and a print-receptive layer which is positioned over the outer surface of the paper substrate. The packaging material also has a moisture barrier layer positioned over the print-receptive layer. The moisture barrier layer is formed from one or more energy-cured polymers. Also, methods for preparing these packaging materials, including printed packaging materials.
Claims71
An article comprising a packaging material comprising:
- a paper substrate having an inner surface and an outer surface;
- a print-receptive layer having an inner surface and an outer surface, wherein the print-receptive layer inner surface is positioned over the paper substrate outer surface and wherein the print-receptive layer outer surface has a Parker Print Smoothness value of about 1.5 or less;
- a moisture barrier layer comprising one or more energy-cured polymers positioned over the print-receptive layer outer surface, wherein the packaging material has a water vapor transportation rate of about 500 g/m2/day or less, wherein the moisture barrier layer comprises one or more energy-cured polymers;
- and
- a moisture barrier reinforcing layer comprising a polyolefin and positioned over the inner surface of the paper substrate.
2 more elements
A method comprising the following steps:
- (a) providing a calendered printable material comprising:
- a paper substrate having an inner surface and an outer surface;
- a print-receptive layer having an inner surface and a calendered outer surface positioned over the paper substrate outer surface, wherein the print-receptive layer inner surface is positioned over the paper substrate outer surface and wherein the calendered print-receptive layer outer surface has a Parker Print Smoothness value of about 1.5 or less;
- and
- a moisture barrier reinforcing layer comprising a polyolefin positioned over the inner surface of the paper substrate;
- (b) applying an energy-curable coating comprising one or more energy-curable monomers over the calendered print-receptive layer outer surface;
- and
- (c) curing the energy-curable monomers to form a moisture barrier layer comprising one or more energy-cured polymers positioned over the calendered print-receptive layer outer surface to provide a printed packaging material having a water vapor transportation rate of about 500 g/m2/day or less.
5 more elements
A method comprising the following steps:
- (a) providing an unreeled printable material comprising:
- a paper substrate having an outer surface and inner surface;
- a print-receptive layer having an inner surface and an outer surface, wherein the print-receptive layer inner surface is positioned over the paper substrate outer surface and wherein the print-receptive layer outer surface has a Parker Print Smoothness value of about 1.5 or less;
- and
- a moisture barrier reinforcing layer comprising a polyolefin positioned over the inner surface of the paper substrate;
- (b) depositing print colorant on the print-receptive layer outer surface to form one or more printed areas to provide a printed material;
- (c) applying to the printed material an energy-curable coating comprising one or more energy-curable monomers over the print-receptive layer outer surface, including the printed areas, to provide a coated printed material;
- and
- (d) curing the energy-curable monomers to form a moisture barrier layer comprising one or more energy-cured polymers positioned over the coated print-receptive layer outer surface to provide a printed packaging material having a water vapor transportation rate of about 500 g/m2/day or less;
- wherein steps (a) through (d) are carried out as a single pass operation and without reeling up:
- the printed material of step (b) prior to carrying step (c);
- and the coated material of step (c) prior to carrying out step (d).
9 more elements
Dependencies are inferred from the claim text.