US2007000568A1PendingUtilityA1

Packaging material for food items containing permeating oils

49
Individually held — no corporate assignee on recordPriority: Jun 29, 2005Filed: Jun 29, 2006Published: Jan 4, 2007
Est. expiryJun 29, 2025(expired)· nominal 20-yr term from priority
Inventors:Reinhard BohmeJohn C. Files
D21H 27/10B32B 2323/10B32B 2307/408B32B 27/20D21H 19/82B32B 27/10B32B 2307/31D21H 19/56B32B 2439/70B32B 27/32D21H 19/22D21H 19/84B32B 2323/046B32B 2317/12
49
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Claims

Abstract

A packaging material for oily or greasy food items includes one or more features for resisting penetration, masking penetration, or for a combination of resisting and masking penetration by the oily or greasy substance.

Claims

exact text as granted — not AI-modified
1 . An oil resistant packaging material comprising: 
 a substrate that is susceptible to discoloration by an oil; and    an oil resistant layer substantially overlying the substrate,    wherein the oil resistant layer comprises a polymer that is substantially resistant to penetration by oil.    
     
     
         2 . The packaging material of  claim 1 , wherein the oil resistant layer comprises a single polymer.  
     
     
         3 . The packaging material of  claim 1 , wherein the oil resistant layer comprises polypropylene.  
     
     
         4 . The packaging material of  claim 1 , wherein the oil resistant layer has a basis weight of from about 1 to about 10 lbs/ream.  
     
     
         5 . The packaging material of  claim 1 , wherein the oil resistant layer has a basis weight of from about 2 to about 6 lbs/ream.  
     
     
         6 . The packaging material of  claim 1 , wherein the oil resistant layer comprises a blend of two or more polymers.  
     
     
         7 . The packaging material of  claim 1 , wherein the oil resistant layer comprises a filler.  
     
     
         8 . The packaging material of  claim 1 , wherein the oil resistant layer comprises from 0 to about 30 weight % filler.  
     
     
         9 . The packaging material of  claim 1 , wherein 
 the substrate comprises paper or paperboard; and    the oil resistant layer comprises polypropylene and a filler selected from the group consisting of calcium carbonate, magnesium carbonate, silica, calcium oxide, alumina, titanium dioxide, and any combination thereof.    
     
     
         10 . The packaging material of  claim 1 , further comprising a heat seal layer substantially overlying the oil resistant layer.  
     
     
         11 . The packaging material of  claim 10 , wherein the heat seal layer comprises a thermoplastic polymer having a softening temperature of from about 180° F. to about 380° F.  
     
     
         12 . The packaging material of  claim 11 , wherein 
 the substrate comprises paper or paperboard;    the oil resistant layer comprises polypropylene; and    the heat seal layer comprises low density polyethylene.    
     
     
         13 . The packaging material of  claim 11 , wherein 
 the paper or paperboard has a basis weight of from about 8 to about 250 lbs/ream;    the oil resistant layer has a basis weight of from about 1 to about 10 lbs/ream; and    the heat seal layer has a basis weight of from about 2 to about 12 lbs/ream.    
     
     
         14 . A packaging material for masking staining by an oil, comprising: 
 a paper-based substrate that tends to absorb oils, the substrate being formed at least partially from bleached fiber and including at least one of titanium dioxide, calcium carbonate, talc, or clay.    
     
     
         15 . The packaging material of  claim 14 , wherein 
 the substrate comprises paper having a basis weight of about 40 lbs/ream, and    the paper includes at least about 90 lbs of titanium dioxide per ton of paper and at least about 25 weight % bleached fiber.    
     
     
         16 . The packaging material of  claim 14 , wherein 
 the substrate comprises paper having a basis weight of about 40 lbs/ream, and    the paper includes at least about 180 lbs of titanium dioxide per ton of paper and at least about 50 weight % bleached fiber.    
     
     
         17 . A packaging material for masking staining by an oil, comprising: 
 a substrate that tends to absorb oils; and    an opacity modifying layer substantially overlying the substrate, the opacity modifying layer comprising a polymer and an opacity modifier.    
     
     
         18 . The packaging material of  claim 17 , wherein the opacity modifier comprises titanium dioxide.  
     
     
         19 . The packaging material of  claim 17 , further comprising a heat seal layer substantially overlying the opacity modifying layer distal the substrate.  
     
     
         20 . A packaging material for masking staining by an oil, comprising: 
 a substrate that tends to absorb oils, thereby creating a stain; and    a stain masking layer overlying at least a portion of the substrate, the stain masking layer comprising a colorant, wherein the colorant closely resembles the color of the stain, obscures the glossiness of the stain, or any combination thereof.    
     
     
         21 . The packaging material of  claim 20 , wherein the colorant comprises a dark, non-reflective pigment that closely resembles the color of the stain.  
     
     
         22 . The packaging material of  claim 20 , wherein the colorant comprises a reflective pigment that obscures the glossiness of the stain.  
     
     
         23 . The packaging material of  claim 20 , wherein the reflective pigment comprises aluminum flake, brass flake, a pearlescent pigment, or any combination thereof.  
     
     
         24 . The packaging material of  claim 20 , wherein the colorant comprises a first, dark, non-reflective pigment that closely resembles the color of the stain, and a second, reflective pigment that obscures the glossiness of the stain.  
     
     
         25 . The packaging material of  claim 20 , wherein the colorant comprises: 
 from about 50 to 100 weight % carbon black; and    from 0 to about 50 weight % aluminum flake.    
     
     
         26 . The packaging material of  claim 20 , wherein the stain masking layer overlies at least a portion of the substrate in a substantially solid configuration.  
     
     
         27 . The packaging material of  claim 20 , wherein the stain masking layer overlies at least a portion of the substrate in a patterned configuration.  
     
     
         28 . The packaging material of  claim 20 , wherein the colorant comprises carbon black and the stain masking layer overlies at least a portion of the substrate in a patterned configuration comprising lighter and darker shades of black.  
     
     
         29 . The packaging material of  claim 20 , wherein an opacity modifier is incorporated into the substrate.  
     
     
         30 . The packaging material of  claim 29 , wherein the opacity modifier comprises titanium dioxide.  
     
     
         31 . The packaging material of  claim 20 , wherein 
 the stain masking layer overlies at least a portion of a first side of the substrate, and    the packaging material further comprises an opacity modifying layer overlying at least a portion of a second side of the substrate.    
     
     
         32 . The packaging material of  claim 31 , wherein the opacity modifying layer comprises a polymer and an opacity modifier.  
     
     
         33 . The packaging material of  claim 32 , wherein the opacity modifier comprises titanium dioxide.  
     
     
         34 . A packaging material for a food item containing an oil, comprising: 
 a paper-based substrate that appears to be stained when brought into contact with an oil;    an oil resistant layer substantially overlying the substrate, the oil resistant layer comprising 
 a polymer that is substantially resistant to penetration by oil, and  
 an opacity modifier;  
   a heat seal layer substantially overlying the oil resistant layer; and    a stain masking layer overlying at least a portion of a second side of the substrate, the stain masking layer comprising a colorant,    wherein the colorant 
 closely resembles the color of the stain,  
 obscures the glossiness of the stain, or  
 any combination thereof.  
   
     
     
         35 . The packaging material of  claim 34 , wherein 
 the polymer in the oil resistant layer comprises polypropylene;    the opacity modifier comprises titanium dioxide; and    the heat seal layer comprises low density polyethylene.    
     
     
         36 . The packaging material of  claim 34 , wherein 
 the substrate has a basis weight of from about 20 to about 50 lbs/ream;    the oil resistant layer has a basis weight of from about 1 to about 10 lbs/ream; and    the heat seal layer has a basis weight of from about 3 to about 10 lbs/ream.    
     
     
         37 . The packaging material of  claim 34 , wherein the colorant comprises: 
 a first, dark, non-reflective pigment that closely resembles the color of the stain; and    a second, reflective pigment that obscures the glossiness of the stain.    
     
     
         38 . The packaging material of  claim 34 , wherein the colorant comprises: 
 from about 50 to 100 weight % carbon black; and    from 0 to about 50 weight % aluminum flake.    
     
     
         39 . A package formed from the packaging material of  claim 34 .  
     
     
         40 . A package formed from the packaging material of  claim 34  for containing potato-based food items.

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