Packaging material having moisture barrier and methods for preparing same

Patent metadata

Field	Value
Publication number	US-2016236498-A1
Application number	US-201615140935-A
Country	US
Kind code	A1
Filing date	Apr 28, 2016
Priority date	Nov 5, 2010
Publication date	Aug 18, 2016
Grant date	—

Abstract

An article in the form of a packaging material having a water vapor transportation rate of about 500 g/m 2 /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.

First claim

What is claimed is:

1 . 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/m 2 /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 . The article of claim 1 , wherein the packaging material is recyclable.

3 . The article of claim 1 , wherein the paper substrate comprises at least about 40% recyclable paper fibers.

4 . The article of claim 1 , wherein the packaging material comprises ream wrap.

5 . The article of claim 1 , which further comprises a curl control layer positioned between the inner surface of the paper substrate and the moisture barrier reinforcing layer.

6 . The article of claim 5 , wherein the moisture barrier reinforcing layer is positioned on the curl control layer.

7 . The article of claim 6 , which further comprises an inner surface paper sizing layer positioned on the inner surface, and wherein the curl control layer is positioned on the inner surface paper sizing layer.

8 . The article of claim 1 , wherein the moisture barrier reinforcing layer is positioned on the inner surface of the paper substrate.

9 . The article of claim 1 , which further comprises an outer surface paper sizing layer positioned on the outer surface, and wherein the print-receptive layer is positioned on the outer surface paper sizing layer.

10 . The article of claim 1 , wherein the moisture barrier layer is positioned on the print-receptive layer.

11 . The article of claim 1 , wherein the print-receptive layer is an ink-receptive layer.

12 . The article of claim 1 , wherein the print-receptive layer is an ink-receptive layer has a Parker Print Smoothness value of about 1 or less.

13 . The article of claim 1 , wherein the packaging material has a water vapor transportation rate of about 310 g/m 2 /day or less.

14 . The article of claim 13 , wherein the packaging material has a water vapor transportation rate of about 155 g/m 2 /day or less.

15 . The article of claim 13 , wherein the packaging material has a water vapor transportation rate of about 10 g/m 2 /day or less.

16 . The article of claim 13 , wherein the packaging material has a water vapor transportation rate of from about 4 to about 2 g/m 2 /day or less.

17 . The article of claim 1 , wherein the moisture barrier layer is positioned over the entire print-receptive outer surface.

18 . The article of claim 1 , wherein the print-receptive layer comprises one or more printed areas.

19 . The article of claim 1 , wherein the paper substrate comprises at least about 60% recyclable pulp fibers.

20 . The article of claim 1 , wherein the paper substrate comprises from about 5 to about 95% softwood fibers, and from about 5 to about 95% hardwood fibers.

21 . The article of claim 20 , wherein the paper substrate comprises from about 25 to about 75% softwood fibers, and from about 25 to about 75% hardwood fibers.

22 . The article of claim 1 , wherein the paper substrate has a basis weight of from about 30 to about 100 lbs/3300 sq. ft and a caliper of from about 2 to about 5 mils.

23 . The article of claim 22 , wherein the paper substrate has a basis weight of from about 45 to about 75 lbs/3300 sq. ft and a caliper of from about 3 to about 4 mils.

24 . The article of claim 1 , wherein the print-receptive layer comprises. from about 10 to about 90 parts clay; from about 10 to about 30 parts calcium carbonate; from about 0.25 to about 10 parts starch; from about 20 to about 40 parts latex; and from about 0.01 to about 1 parts crosslinker.

25 . The article of claim 24 , wherein the print-receptive layer is provided in a coat weight of from about 3 to about 15 lbs./3300 sq. ft.

26 . The article of claim 25 , wherein the print-receptive layer is provided in a coat weight of from about 4 to about 12 lbs./3300 sq. ft.

27 . The article of claim 1 , wherein the energy-cured polymers are obtained by curing one or more of the following energy-curable monomers: dipropylene glycol diacrylate; tripropylene glycol diacrylate; butanediol diacrylate; hexanediol diacrylate; alkoxylated hexanediol diacrylate; trimethyol propane triacrylate; alkoxylated trimethylol propane triacrylate; di(trimethylol propane triacrylate); glycerolpropoxy triacrylate; pentaerythritrol triacrylate; alkoxylated pentaerythritrol triacrylate; di(pentaerythritrol triacrylate); neopentaglycol diacrylate; alkoxylated neopentaglycol diacrylate; dipropylene glycol dimethacrylate; tripropylene glycol dimethacrylate; butanediol dimethacrylate; hexanediol dimethacrylate; alkoxylated hexanediol dimethacrylate; trimethyol propane trimethacrylate; alkoxylated trimethylol propane trimethacrylate; di(trimethylol propane methtriacrylate); glycerolpropoxy trimethacrylate; pentaerythritrol trimethacrylate; alkoxylated pentaerythritrol trimethacrylate; di(pentaerythritrol trimethacrylate); neopentaglycol dimethacrylate; alkoxylated neopentaglycoldimethacrylate; acrylated epoxy resins; bis acrylic esters of bisphenol A; acrylated polyurethanes; acrylated polyesters; or acrylated polyethers.

28 . The article of claim 1 , wherein the energy-cured polymers are obtained by curing one or more of the following energy-curable monomers: urethane acrylates, aliphatic urethane acrylates, aliphatic urethane triacrylate/monomer blends, aliphatic urethane triacrylates blended with 1,6-hexanediol acrylates, hexafunctional urethane acrylates, siliconized urethane acrylates, aliphatic siliconized urethane acrylates, polyether acrylates, trimethylolpropane triacrylates, 2-phenoxyethyl acrylates, isobornyl acrylates, propoxylated glyceryl triacrylates, acrylate ester derivatives, methacrylate ester derivatives, acrylate ester derivatives, or tripropylene glycol diacrylate.

29 . The article of claim 1 , wherein the energy-cured polymers are obtained by curing one or more of the following energy-curable monomers: trimethylolpropane ethoxy triacrylate, epoxy acrylate oligomers, or tripropylene glycol diacrylate.

30 . The article of claim 1 , wherein the moisture barrier layer is provided at a coat weight of from about 2 to about 10 gsm.

31 . The article of claim 30 , wherein the moisture barrier layer is provided at a coat weight of from about 3 to about 7 gsm.

32 . The article of claim 1 , wherein the moisture barrier reinforcing layer comprises polyolefin comprising polyethylene or polypropylene.

33 . The article of claim 1 , wherein the moisture barrier reinforcing layer comprises polyolefin in the form of a homopolymer, a copolymer, a random copolymer, a graph polymer or copolymer, or a block copolymer thereof.

Assignees

• Int Paper Co

Inventors

• Anderson Dennis W
• Ewing Patricia L
• Bradford Timothy J
• Murphy Michael J

Classifications

• D21H19/10

  Coatings without pigments (D21H19/66 takes precedence) · CPC title

• B32B2307/75

  Printability · CPC title

• B41M1/04

  Flexographic printing · CPC title

• Y10T428/31786

  Of polyester [e.g., alkyd, etc.] · CPC title

• B41M5/502

  characterised by structural details, e.g. multilayer materials (supports, backcoats or intermediate layers for thermal dye transfer donor and receiver sheets B41M5/41, B41M5/42) · CPC title