Static COF differential poly film ream wrap
DCFirst Claim
Patent Images
1. A solid film ream wrapper comprising:
- a first layer of polypropylene, biaxially oriented polypropylene (BOPP), or polyester solid film;
a second layer of polypropylene, biaxially oriented polypropylene (BOPP), or polyester solid film;
said first layer and said second layer having same Static Coefficient of Friction (COF) measurement; and
a third layer of polymer, copolymer and/or terpolymer resins, alone, or blended with polyester, or any known adhesive, said third layer interposed between said first layer and said second layer;
said first layer or said second layer being coated in a recurring pattern, design, logo, or other marking on one side with any material that alters said Static COF measurement by at least 0.02.
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Abstract
A solid plastic film wrapper with a Static Coefficient of Friction (Static COF) differential used for packaging paper products, and a method for producing the same.
14 Citations
7 Claims
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1. A solid film ream wrapper comprising:
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a first layer of polypropylene, biaxially oriented polypropylene (BOPP), or polyester solid film;
a second layer of polypropylene, biaxially oriented polypropylene (BOPP), or polyester solid film;
said first layer and said second layer having same Static Coefficient of Friction (COF) measurement; and
a third layer of polymer, copolymer and/or terpolymer resins, alone, or blended with polyester, or any known adhesive, said third layer interposed between said first layer and said second layer;
said first layer or said second layer being coated in a recurring pattern, design, logo, or other marking on one side with any material that alters said Static COF measurement by at least 0.02.
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2. A solid film ream wrapper consisting of:
a sheet of polypropylene, biaxially oriented polypropylene (BOPP), or polyester solid film having a thickness gauge between about 40 to 400. - View Dependent Claims (3, 4)
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5. A method for making a solid plastic film ream wrapper comprising:
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coating or applying in a recurrent pattern, design, logo, or other marking one side of a solid plastic film layer with any material that alters Static COF of said coated layer;
conveying said coated film layer and a second plastic film layer to a pair of nip rollers;
said first layer and said second layer having same static coefficient of friction;
creating a static COF differential between said film layers of at least 0.02;
directing said first and second layers into an adjacent non contact position with a polymer or adhesive layer on its respective opposite side prior to passing through said nip rollers;
passing said layers through said nip rollers.
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6. A method for making a solid plastic film ream wrapper comprising:
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conveying a first layer comprising a polypropylene, biaxially oriented polypropylene (BOPP), or polyester solid film; and
a second layer comprising polypropylene, biaxially oriented polypropylene (BOPP), or polyester solid film toward a pair of nip rollers;
said first and second layers having same static coefficient of friction;
directing said first and second layers into an adjacent non contact position with a polymer or adhesive layer on its respective opposite side prior to passing through said nip rollers;
passing said layers through said nip rollers;
forming said laminated solid plastic film ream wrapper;
coating or applying in a recurrent pattern, design, logo, or other marking one side of a plastic film layer with any material that alters the Static COF of said coated layer.
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7. A method of making a solid plastic film ream wrapper comprising:
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coating or applying in a recurrent pattern, design, logo, or other marking one side of a plastic film layer with any material that alters the Static COF of said coated layer by at least 0.02;
conveying said coated film layer and a second plastic film layer to a pair of nip rollers;
said first layer and said second layer having same static coefficient of friction;
creating a static COF differential between said film layers of at least 0.02;
directing said first and second layers into an adjacent non contact position with a polymer or adhesive layer on its respective opposite side prior to passing through said nip rollers;
passing said layers through said nip rollers.
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Specification