HIGH STRENGTH REAM WRAP

Abstract
A new high strength poly one-side ream wrapper made by utilizing copolymer and/or terpolymer resins.
Description

BRIEF DESCRIPTION OF THE DRAWINGS


FIG. 1 illustrates a process for forming a poly coated paper with a copolymer and/or terpolymer coating.



FIG. 2 illustrates a process for forming a poly coated paper with polyethylene monomer and copolymer and/or terpolymer blended into the monomer.



FIG. 3 illustrates a process for forming a coextruded poly coated paper with one layer of copolymer or terpolymer and one layer of polyethylene monomer.



FIG. 4 illustrates the product formed by the process of FIG. 3.



FIG. 5 illustrates a process for forming a coextruded poly coated paper with one layer of copolymer or terpolymer and one layer of polyethylene monomer.



FIG. 6 illustrates the product formed by the process of FIG. 5.



FIG. 7 illustrates a process for forming a coextruded poly coated paper with one layer of copolymer or terpolymer between two layers of polyethylene monomer.



FIG. 8 illustrates the product formed by the process of FIG. 7.



FIG. 9 illustrates a process for forming a co-extruded poly coated paper with one layer of polyethylene monomer between two layers of copolymer and/or terpolymer resin.



FIG. 10 illustrates the product formed by the process of FIG. 9.





DETAILED DESCRIPTION OF THE INVENTION

In an embodiment of the present invention, the low density polyethylene resin is a monomer utilizing ethylene feed stock. The copolymer and terpolymer resins are made by combining butene, hexene and/or octene feedstock with ethylene feedstock.


In one embodiment shown in FIG. 1, the copolymer and terpolymer resins are applied to the paper surface. The copolymer and/or terpolymer 10 are fed into an extruder die 30 where it becomes extrudate 40. The extrudate 40 is coated on the paper 20 between the backing roll 50 and the chill roll 60 to form a poly coated paper with copolymer and/or terpolymer coating 70.


In a further embodiment shown in FIG. 2, low-density monomer polyethylene resin 80 is mixed with copolymer and/or terpolymer resins 10 before or as being fed into an extruder die 30. The low-density polyethylene monomer and copolymer and/or terpolymer resin becomes extrudate 40. The extrudate 40 is applied to the paper surface 20 between the backing roll 50 and the chill roll 60. This creates a poly coated paper with polyethylene monomer and copolymer or terpolymer blended into the monomer 90.


In a further embodiment, shown in FIG. 3, the copolymer and/or terpolymer layer 10 which may be blended with polyethylene monomer, is coextruded with a polyethylene monomer layer 80. The copolymer and/or terpolymer layer 10 and the polyethylene monomer layer 80 are fed through a coextruder die 130 to form coextrudate 140 wherein the coextrudate 140 has the copolymer and/or terpolymer 10 facing the paper 120. The co-extrudate 140 is applied to the paper surface 120 between the backing roll 50 and the chill roll 60. This creates a poly coated paper 170 with one layer of copolymer or terpolymer and one layer of polyethylene monomer.



FIG. 4 shows the product made by the process shown in FIG. 3 wherein the co-extruded poly coated paper 170 has one layer of copolymer or terpolymer 180 on top of the paper 120 and one layer of polyethylene monomer 110 on top of layer 180.


In FIG. 5 the copolymer and/or terpolymer layer 10 which may be blended with a polyethylene monomer, is coextruded with a polyethylene monomer layer 80. The copolymer and/or terpolymer layer 10 and the polyethylene monomer layer 80 are fed through a coextruder die 130 to form coextrudate 140 wherein the coextrudate 140 has the polyethylene monomer 80 facing the paper 120. The co-extrudate 140 is applied to the paper surface 120 between the backing roll 50 and the chill roll 60. This creates a poly coated paper 170 with one layer of copolymer or terpolymer and one layer of polyethylene monomer.



FIG. 6 shows product made by the process shown in FIG. 5 wherein the co-extruded poly coated paper 170 has one layer of polyethylene monomer 110 on top of paper layer 120 and layer 180 on top of layer 110.


In FIG. 7 the copolymer and/or terpolymer layer 10 which may be blended with polyethylene monomer, is coextruded with a layer of polyethylene monomer 80 on each side. The copolymer and/or terpolymer layer 10 and the polyethylene monomer layers 80 are fed through a coextruder die 130 to form coextrudate 140 wherein the coextrudate 140 has one of the polyethylene monomer layers 80 facing the paper 120. The co-extrudate 140 is applied to the paper surface 120 between the backing roll 50 and the chill roll 60. This creates a poly coated paper 210 with one layer of copolymer or terpolymer between two layers of polyethylene monomer.



FIG. 8 shows the product made by the process shown in FIG. 7 wherein the co-extruded poly coated paper 120 has one layer of polyethylene monomer 110 on top of paper layer 120 followed by layer 180 having on top of it a second layer 110.


In FIG. 9 the copolymer and/or terpolymer layer 10 which may be blended with polyethylene monomer, is coextruded with a layer of polyethylene monomer 80 on each side. The copolymer and/or terpolymer layer 10 and the polyethylene monomer layers 80 are fed through a coextruder die 130 to form coextrudate 140 wherein the coextrudate 140 has one of the polyethylene monomer layers 80 facing the paper 120. The co-extrudate 140 is applied to the paper surface 120 between the backing roll 50 and the chill roll 60. This creates a poly coated paper 220 with one layer of copolymer or terpolymer between two layers of polyethylene monomer.



FIG. 10 shows the product made by the process shown in FIG. 9 wherein the co-extruded poly coated paper 120 has one layer of polyethylene monomer 110 on top of paper layer 120 followed by layer 180 having on top of it a second layer 110.


By utilizing these copolymer and/or terpolymer resins the present invention achieves a substantial improvement in the tear strength of the ream wrapper. Below are results using the same 50# Canfor paper as above and 14 pounds of combined copolymer or terpolymer resin and low density polyethylene monomer which shows the significant strength gain versus the traditional low density polyethylene shown above.
















Machine
Cross



Direction
Direction



Tear
Tear


















50# Canfor Paper
122
137


50# Canfor Paper with 14# copolymer
196
240


and/or terpolymer resin or a blend of


low density polyethylene monomer resin


and copolymer or terpolymer resin or a


coextrusion of low density monomer polyethylene


resin and copolymer and/or terpolymer resin


Strength Gain
70
103





MD Tear test-TAPPI T-414-units grams of force


CD Tear test-TAPPI T-414-units grams of force





Claims
  • 1-11. (canceled)
  • 12. A method for producing a high strength poly one side ream wrapper comprising; coextruding said copolymer and/or terpolymer with a polyethylene monomer layer by feeding said copolymer and/or terpolymer layer and said polyethylene monomer layer through a coextruder die;forming a coextrudate;applying said coextrudate to a paper surface with said polyethylene monomer facing said paper; said coextrudate applied to said paper surface between a backing roll and a chill roll;creating a poly coated paper with one layer of copolymer or terpolymer and one layer of polyethylene monomer.
  • 13. The method of claim 12 further comprising: blending said copolymer and/or terpolymer with a polyethylene monomer prior to said coextruding.
  • 14. A high strength poly one side ream wrapper comprising; a co-extruded poly coated paper having one layer of polyethylene monomer on top of a paper layer and a layer of copolymer or terpolymer on top of said polyethylene monomer layer.
  • 15. The high strength poly one side ream wrapper of claim 14 wherein said copolymer or terpolymer layer contains polyethylene monomer.
  • 16. A method for producing a high strength poly one side ream wrapper comprising; coextruding a copolymer and/or terpolymer layer with a layer of polyethylene monomer on each side of said coploymer and/or terpolymer layer by feeding said copolymer and/or terpolymer layer and said polyethylene monomer layers through a coextruder die;forming a coextrudate;applying to a paper surface said coextrudate so that one of said polyethylene monomer layers faces said paper by running said coextrudate and said paper between a backing roll and a chill roll;creating a poly coated paper with one layer of copolymer or terpolymer between two layers of polyethylene monomer.
  • 17. The method of claim 16 further comprising; blending said copolymer and/or terpolymer with a polyethylene monomer prior to said coextruding.
  • 18-19. (canceled)
Continuations (1)
Number Date Country
Parent 10023500 Dec 2001 US
Child 11548154 US