Stretch wrap films

Abstract

The present invention provides for improved polyolefin cling/slip stretch wrap films having superior load retention, elongation, tear resistance and puncture resistance properties and for the methods of using those stretch wrap films. The stretch wrap films are preferably constructed in a multilayer fashion having an outside cling layer, an outside slip layer, at least one inside puncture resistant layer comprising a metallocene-catalyzed polyethylene resin, and at least one inside transverse direction tear resistant layer.

What is claimed is:  
     
       1. A multilayer, stretch wrap film that contains at least four polymeric layers, comprising: 
       (a) a first outer polymeric layer, said first outer polymeric layer being a cling layer;  
       (b) a second outer polymeric layer, said second outer polymeric layer being a slip layer, said first outer film layer having sufficient cling resulting from inherent cling alone, cling additives or a combination thereof so as to produce a cling force to the second layer of at least about 140 grams/inch as determined by ASTM D5458-94, and said second outer layer having a kinetic coefficient of friction value of below about 1.0 to a layer of itself;  
       (c) a puncture resistant, inner polymeric layer, located between said first outer layer and said second outer layer, said puncture resistant layer comprising at least 40 weight percent of a polyethylene copolymer or terpolymer resin, said polyethylene copolymer or terpolymer resin having a polydispersity of from 1 to 4, a melt index of from 0.5 to 10 g/10 min., and a melt flow ratio (I 20 /I 2 ) of from 12 to 22; and  
       (d) a tear resistant, inner polymeric layer, located adjacent to said puncture resistant inner layer, said tear resistant layer constructed with a resin that produces a film having a higher transverse direction tear resistance than a film produced by the resins used to construct said puncture resistant film layer, said first outer layer and second outer layer;  
       so as to produce a stretch wrap film having a transverse direction tear resistance of at least 500 g/mil as determined by ASTM D1922, a machine direction tear resistance of at least about 175 g/mil as determined by ASTM D1922, and an F-50 dart drop value of at least about 150 g/mil, as determined by ASTM D1709.  
     
     
       2. The stretch wrap film of  claim 1  wherein said first outer layer has sufficient cling resulting from inherent cling alone, cling additives or a combination thereof so as to produce a cling force to the second outer layer at least about 180 grams/inch. 
     
     
       3. The stretch wrap film of  claim 1  wherein said polyethylene resin of said puncture resistant layer has a density of from about 0.88 to about 0.94 g/cm 3 . 
     
     
       4. The stretch wrap film of  claim 1  wherein said puncture resistant layer comprises at least about 50 weight percent of said polyethylene resin. 
     
     
       5. The stretch wrap film of  claim 4  wherein said polyethylene resin of said puncture resistant layer has a polydispersity of between about 2.0 and 4.0. 
     
     
       6. The stretch wrap film of  claim 4  wherein the F-50 dart drop value of said stretch wrap film is at least about 250 g/mil. 
     
     
       7. The stretch wrap film of  claim 4  wherein the transverse direction tear resistance of the stretch wrap film is at least about 600 g/mil. 
     
     
       8. The stretch wrap film of  claim 7  wherein the stretch wrap film has a transverse direction tear resistance of at least 700 g/mil. 
     
     
       9. The stretch wrap film of  claim 7  wherein the machine direction tear resistance of the stretch wrap film is at least about 225 g/mil. 
     
     
       10. The stretch wrap film of  claim 9  wherein the machine direction tear resistance of the stretch wrap film is at least about 275 g/mil. 
     
     
       11. The stretch wrap film of  claim 4  wherein the stretch wrap film has a force required to elongate the film 200% of at least 1600 psi as determined by ASTM D882, and a force required to elongate the film 250% of at least 1800 psi as determined by ASTM D882. 
     
     
       12. The stretch wrap film of  claim 11  wherein the stretch wrap film has a force required to elongate the film 200% of at least 2000 psi and a force required to elongate the film 250% of at least 2250 psi. 
     
     
       13. The stretch wrap film of  claim 4  wherein said polyethylene resin of said puncture resistant film layer has a polydispersity of 2.0 to 4.0, an I 20 /I 2  ratio of from 14 to 20, a density of from 0.88 to about 0.94 g/cm 3 , and a melt index of from 1 to 5 g/10 min. 
     
     
       14. The stretch wrap film of  claim 4  wherein said stretch wrap comprises from about 5 to about 20 weight percent of said first outer layer, from about 5 to about 20 weight percent of said second outer layer, from about 5 to about 40 weight percent of said tear resistant layer, and from about 40 to about 80 weight percent of said puncture resistant layer. 
     
     
       15. The stretch wrap film of  claim 4  wherein the resin used to construct the tear resistant layer comprises a low density polyethylene resin, said low density polyethylene having a density in the range of from about 0.90 to about 0.935 g/cm 3  with a melt index of from about 0.5 to about 10 g/10 min. 
     
     
       16. The stretch wrap film of  claim 1  wherein the second outer layer comprises an ethylene-acrylate polymer, said ethylene-acrylate polymer having an acrylate content between about 2 to about 40 weight percent. 
     
     
       17. The stretch wrap film of  claim 1  further comprising at least one additional puncture resistant, inner polymeric layer, located between said first outer layer and said second outer layer, said additional puncture resistant layer comprising at least 40 weight percent of a polyethylene resin, said polyethylene resin having a polydispersity of from 1 to 4, a melt index of from 0.5 to 10 g/10 min., and a I 20 /I 2  melt flow ratio of from 14 to 20. 
     
     
       18. The stretch wrap film of  claim 17  wherein said polyethylene resin of said additional puncture resistant film layer has a density of from about 0.88 to about 0.94 g/cm 3 . 
     
     
       19. The stretch wrap film of  claim 17  wherein said additional puncture resistant film layer comprises at least about 50 weight percent of said polyethylene resin. 
     
     
       20. The stretch wrap film of  claim 4  further comprising at least one additional tear resistant, inner polymeric layer, located between said first outer layer and second outer layer, said additional tear resistant layer constructed with a resin that produces a film having a higher transverse direction tear resistance than a film produced by the resins used to construct said puncture resistant layer and said first outer layer and second outer layer. 
     
     
       21. The stretch wrap film of  claim 1  wherein said polyethylene resin of said puncture resistant layer is made with a metallocene catalyst. 
     
     
       22. The stretch wrap film of  claim 1  wherein said cling force is partially from at least one cling additive. 
     
     
       23. The stretch wrap film of  claim 22  wherein said cling additive is poly-isobutylene. 
     
     
       24. The stretch wrap film of  claim 1  wherein said cling force is partially from n-hexane extractable. 
     
     
       25. A multilayer, stretch wrap film that contains at least four polymeric layers, comprising: 
       (a) a first outer polymeric layer, said first outer polymeric layer being a cling layer comprising an ethylene-acrylate resin, said ethylene-acrylate resin having an acrylate content of between about 2 and 40 percent by weight and a melt index of from about 3 to about 7 g/10 min.;  
       (b) a second outer polymeric layer, said second outer polymeric layer being a slip layer, said first outer layer having sufficient cling resulting from inherent cling alone, cling additives or a combination thereof so as to produce a cling force to the second layer of at least about 140 grams/inch as determined by ASTM D5458-94, and said second outer layer having a kinetic coefficient of friction value of below about 1.0 to a layer of itself;  
       (c) a puncture resistant, inner polymeric layer, located between said first outer layer and said second outer layer said puncture resistant layer comprising at least 40 weight percent of a polyethylene copolymer or terpolymer resin, said polyethylene copolymer or terpolymer resin having a polydispersity of from 1 to 4, a melt index of from 0.5 to 10 g/10 min., and a melt flow ratio (I 20 /I 2 ) of from 12 to 22; and  
       (d) a tear resistant, inner polymeric layer, located adjacent to said puncture resistant inner layer, said tear resistant layer comprising a high pressure low density polyethylene resin, said high pressure low density polyethylene resin having a density of from about 0.90 to about 0.935 g/cm 3  and a melt index of from about 0.5 to about 10 g/10 min.;  
       so as to produce a stretch wrap film having a transverse direction tear resistance of at least 500 g/mil as determined by ASTM D1922, a machine direction tear resistance of at least about 175 g/mil as determined by ASTM D1922, and an F-50 dart drop value of at least 150 g/mil as determined by ASTM D1709.  
     
     
       26. The stretch wrap film of  claim 25  wherein said first outer layer has sufficient cling resulting from inherent cling alone, cling additives or a combination thereof so as to produce a cling force to the second outer layer at least about 180 grams/inch. 
     
     
       27. The stretch wrap film of  claim 25  wherein said polyethylene resin of said puncture resistant layer has a density of from about 0.88 to about 0.94 g/cm 3 . 
     
     
       28. The stretch wrap film of  claim 27  wherein said puncture resistant layer comprises at least about 50 weight percent of said polyethylene resin. 
     
     
       29. The stretch wrap film of  claim 28  wherein the F-50 dart drop value of said stretch wrap film is at least about 250 g/mil. 
     
     
       30. The stretch wrap film of  claim 28  wherein the transverse direction tear resistance of the stretch wrap film is at least about 600 g/mil. 
     
     
       31. The stretch wrap film of  claim 30  wherein the stretch wrap film has a transverse direction tear resistance of at least 700 g/mil. 
     
     
       32. The stretch wrap film of  claim 30  wherein the stretch wrap film has a machine direction tear resistance of at least about 225 g/mil. 
     
     
       33. The stretch wrap film of  claim 32  wherein the stretch wrap film has a machine direction tear resistance of at least about 275 g/mil. 
     
     
       34. The stretch wrap film of  claim 28  the stretch wrap film has a force required to elongate the film 200% of at least 1600 psi as determined by ASTM D822 and a force required to elongate the film 250% of at least 1800 psi as determined by ASTM D822. 
     
     
       35. The stretch wrap film of  claim 34  the stretch wrap film has a force required to elongate the film 200% of at least 2000 psi and a force required to elongate the film 250% of at least 2250 psi. 
     
     
       36. The stretch wrap film of  claim 28  wherein said stretch wrap comprises from about 5 to about 20 weight percent of said first outer layer, from about 5 to about 20 weight percent of said second outer layer, from about 5 to about 40 weight percent of said tear resistant layer, and from about 40 to about 80 weight percent of said puncture resistant layer film. 
     
     
       37. The stretch wrap film of  claim 25  wherein said second outer layer comprises a linear low density polyethylene resin, said linear low density polyethylene having a density of from about 0.925 to about 0.945 g/cm 3  and a melt index of from about 2.0 to about 5.0 g/10 min. 
     
     
       38. The stretch wrap film of  claim 25  wherein said polyethylene resin of said puncture resistant layer is made with a metallocene catalyst. 
     
     
       39. The stretch wrap film of  claim 25  wherein said cling force is partially from at least one cling additive. 
     
     
       40. The stretch wrap film of  claim 39  wherein said cling additive is poly-isobutylene. 
     
     
       41. The stretch wrap film of  claim 25  wherein said cling force is partially from n-hexane extractables. 
     
     
       42. A multilayer, stretch wrap film that contains at least four polymeric film layers, comprising: 
       (a) a first outer polymeric layer comprising about 5 to about 20 wt. % polyethylene methyl acrylate, said polyethylene methyl acrylate having a melt index of from about 3 to about 7 g/10 min., said first outer polymeric layer being a cling layer;  
       (b) a second outer polymeric layer comprising an antiblock additive and about 2 to about 40 wt. % of a resin chosen from the group consisting of a linear lower density polyethylene and a polypropylene resin, said linear lower density having a melt index of from about 2 to about 5 g/10 min., said polypropylene resin having a melt flow ratio of from about 3 to about 10 and a density of from about 0.925 to about 0.945 g/cm 3 , said second outer polymeric layer being a slip layer, said first outer layer has sufficient cling resulting from inherent cling alone, cling additives or a combination thereof so as to produce a cling force to the second layer of at least about 180 grams/inch as determined by ASTM D5458-94, and said second outer layer having a kinetic coefficient of friction value of below about 1.0 to a layer of itself;  
       (c) a puncture resistant, inner polymeric layer, located between said first outer layer and said second outer layer, said puncture resistant layer comprising at least 40 weight percent of a copolymer of ethylene and hexene prepared using a metallocene catalyst, said copolymer having a polydispersity of from about 2 to about 3, a melt index of from about 1 to about 5 g/10 min., and a melt flow ratio (I 20 /I 2 ) of from about 16 to about 18; and  
       (d) a tear resistant, inner polymeric layer, located adjacent to said puncture resistant layer, said tear resistant layer comprising about 5 to about 20 wt. % of a resin that produces a film having a higher transverse direction tear resistance than a film produced by the resins used to construct said puncture resistant layer and said first outer layer and said second outer layer said resin having a melt index of about 1 to about 2.5 g/10 min.;  
       so as to produce a stretch wrap film having a transverse direction tear resistance of at least 700 g/mil as determined by ASTM D1922, a machine direction tear resistance of at least about 225 g/mil as determined by ASTM D1922, an F-50 dart drop value of at least 250 g/mil as determined by ASTM D1709, a force required to elongate the film 200% of at least 2000 psi as determined by ASTM D882 and a force required to elongate the film 250% of at least 2250 psi as determined by ASTM D882.  
     
     
       43. A multilayer, stretch wrap film that contains at least four polymeric film layers, including a first outer polymeric layer, a second outer polymeric layer, a third polymeric layer and a fourth polymeric layer, wherein said first outer layer has sufficient cling resulting from inherent cling alone, cling additives or a combination thereof so as to produce a cling force to the second outer layer of at least about 140 grams/inch as determined by ASTM D5458-94, said second outer layer has a kinetic coefficient of friction value of below about 1.0 to a layer of itself, each of said third and fourth polymeric layers being located between said first layer and said second layer, so as to produce a stretch wrap film having a transverse direction tear resistance of at least 500 g/mil as determined by ASTM D1922, a machine direction tear resistance of at least about 175 g/mil as determined by ASTM D1922, and an F-50 dart drop value of at least about 150 g/mil as determined by ASTM D 1709. 
     
     
       44. The stretch wrap film of  claim 43  wherein said first outer layer has sufficient cling resulting from inherent cling alone, cling additives or a combination thereof so as to produce a cling force to the second outer layer of at least about 180 grams/inch. 
     
     
       45. The stretch wrap film of  claim 43  wherein the F-50 dart drop value of said stretch wrap film is at least about 250 g/mil. 
     
     
       46. The stretch wrap film of  claim 43  wherein the transverse direction tear resistance of the stretch wrap film is at least about 600 g/mil. 
     
     
       47. The stretch wrap film of  claim 43  wherein the stretch wrap film has a transverse direction tear resistance of at least about 700 g/mil. 
     
     
       48. The stretch wrap film of  claim 43  wherein the machine direction tear resistance of the stretch wrap film is at least about 225 g/mil. 
     
     
       49. The stretch wrap film of  claim 48  wherein the machine direction tear resistance of the stretch wrap film is at least about 225 g/mil. 
     
     
       50. The stretch wrap film of  claim 43  wherein the stretch wrap film has a force required to elongate the film 200% of at least 1600 psi as determined by ASTM D882 and a force required to elongate the film 250% of at least 1800 psi as determined by ASTM D882. 
     
     
       51. The stretch wrap film of  claim 50  wherein the stretch wrap film has a force required to elongate the film 200% of at least 2000 psi and a force required to elongate the film 250% of at least 2250 psi. 
     
     
       52. The stretch wrap film of  claim 43  wherein said cling force is partially from n-hexane extractables. 
     
     
       53. The stretch wrap film of  claim 43  wherein said cling force is partially from at least one cling additive. 
     
     
       54. The stretch wrap film of  claim 43  wherein said cling additive is poly-isobutylene. 
     
     
       55. A multilayer, stretch wrap film that contains at least four polymeric layers, comprising: 
       (a) a first outer polymeric layer, said first outer polymeric layer being a cling layer; 
       (b) a second outer polymeric layer, said second outer polymeric layer being a slip layer, said first outer film layer having sufficient cling resulting from inherent cling alone, cling additives or a combination thereof so as to produce a cling force to the second layer of at least about  140  grams/inch as determined by ASTM D 5458 - 94 , and said second outer layer having a kinetic coefficient of friction value of below about  1 . 0  to a layer of itself, 
       (c)  a puncture resistant, inner polymeric layer, located between said first outer layer and said second outer layer, said punbcture resistant layer comprising at least  40  weight percent of a polyethylene copolymer or terpolymer resin, said polyethylene copolymer or terpolymer resin having a melt index of from  0 . 5  to  10  g/ 10  min., and a melt flow ratio (I   20   /I   2   ) of from  12  to  22 ; and   
       (d) a tear resistant, inner polymeric layer, located adjacent to said puncture resistant inner layer, said tear resistant layer constructed with a resin that produces a film having a higher transverse direction tear resistance than a film produced by the resins used to construct said puncture resistant film layer, said first outer layer and second outer layer; 
       so as to produce a stretch wrap film having a transverse direction tear resistance of at least  500  g/mil as determined by ASTM D 1922 , a machine direction tear resistance of at least about  175  g/mil as determined by ASTM D 1922  and an F- 50  dart drop value of at least about  150  g/mil, as determined by ASTM D 1709 . 
     
     
       56. The stretch wrap film of  claim 55  wherein said first outer layer has sufficient cling resulting from inherent cling alone, cling additives or a combination thereof so as to produce a cling force to the second outer layer at least about  180  grams/inch. 
     
     
       57. The stretch wrap film of  claim 55  wherein said polyethylene resin of said puncture resistant layer has a density of from about  0 . 88  to about  0 . 94  g/cm3. 
     
     
       58. The stretch wrap film of  claim 55  wherein said puncture resistant layer comprises at least about  50  weight percent of said polyethylene resin. 
     
     
       59. The stretch wrap film of  claim 58  wherein said polyethylene resin of said puncture resistant layer has a polydispersity of between about  2 . 0  and  4 . 0 . 
     
     
       60. The stretch wrap film of  claim 58  wherein the F- 50  dart drop value of said stretch wrap film is at least about  250  g/mil. 
     
     
       61. The stretch wrap film of  claim 58  wherein the transverse direction tear resistance of the stretch wrap film is a least about  600  g/mil. 
     
     
       62. The stretch wrap film of  claim 61  wherein the stretch wrap film has a transverse direction tear resistance of at least  700  g/mil. 
     
     
       63. The stretch wrap film of  claim 61  wherein the stretch wrap film has a transverse direction tear resistance of at least  225  g/mil. 
     
     
       64. The stretch wrap film of  claim 63  wherein the machine direction tear resistance of the stretch wrap film is at least about  275  g/mil. 
     
     
       65. The stretch wrap film of  claim 58  wherein the stretch wrap film has a force required to elongate the film  200 % of at least  1600  psi as determined by ASTM D 882 , and a force required to elongate the film  250 % of at least  180  psi as determined by ASTM D 882 . 
     
     
       66. The stretch wrap film of  claim 65  wherein the stretch wrap film has a force required to elongate the film  200 % of at least  2000  psi and a force required to elongate the film  250 %  of at least  2250  psi.   
     
     
       67. The stretch wrap film of  claim 58  wherein said polyethylene resin of said puncture resistant film layer has an I 20   /I   2    ratio of from  14  to  20 , a density of from  0 . 88  to about  0 . 94  g/cm   3    and a melt index of from  1  to  5  g/ 10  min.   
     
     
       68. The stretch wrap film of  claim 58  wherein said stretch wrap comprises from about  5  to about  20  weight percent of said first outer layer, from about  5  to about  20  weight percent of said second outer layer, from about  5  to about  40  weight percent of said tear resistant layer and from about  40  to about  80  weight percent of said puncture resistant layer. 
     
     
       69. The stretch wrap film of  claim 58  wherein the resin used to construct the tear resistant layer comprises a low density polyethylene resin, said low density polyethylene having a density in the range of from about  0 . 90  to about  0 . 935  g/cm 3    with a melt index of from about  0 . 5  to about  10  g/ 10  min.   
     
     
       70. The stretch wrap film of  claim 55  wherein the second outer layer comprises an ethylene-acrylate polymer, said ethylene-acrylate polymer having an acrylate content between about  2  to about  40  weight percent. 
     
     
       71. The stretch wrap film of  claim 55  further comprising at least one additional puncture resistant inner polymeric layer located between said first outer layer and said second outer layer, said additional puncture resistant layer comprising at least  40  weight percent of a polyethylene resin, said polyethylene resin having a melt index of from  0 . 5  to  10  g/ 10  min. and a I 20   /I   2    melt flow ratio of from  14  to  20 .   
     
     
       72. The stretch wrap film of  claim 71  wherein said polyethylene resin of said additional puncture resistant film layer has a density of from about  0 . 88  to about  0 . 94  g/cm 3 . 
     
     
       73. The stretch wrap film of  claim 71  wherein said additional puncture resistant film layer comprises at least about  50  weight percent of said polyethylene resin. 
     
     
       74. The stretch wrap film of  claim 58  further comprising at least one additional tear resistant, inner polymeric layer, located between said first outer layer and second outer layer, said additional tear resistant layer constructed with a resin that produces a film having a higher transverse direction tear resistance than a film produced by the resins used to construct said puncture resistant layer and said first outer layer and second outer layer. 
     
     
       75. The stretch wrap film of  claim 55  wherein said polyethylene resin of said puncture resistant layer is made with a metallocene catalyst. 
     
     
       76. The stretch wrap film of  claim 55  wherein said cling force is partially from at least one cling additive. 
     
     
       77. The stretch wrap film of  claim 76  wherein said cling additive is polyisobutylene. 
     
     
       78. The stretch wrap film of  claim 55  wherein said cling force is partially from n-hexane extractable. 
     
     
       79. A multilayer, stretch wrap film that contains at least four polymeric layers, comprising: 
       (a) a first outer polymeric layer, said first outer polymeric layer being a cling layer comprising an ethylene-acrylate resin, said ethylene-acrylate resin having an acrylate content of between about  2  and  40  percent by weight and a melt index of from about  3  to about  7  g/ 10  min; 
       (b) a second outer polymeric layer, said second outer polymeric layer being a slip layer, said first outer film layer having sufficient cling resulting from inherent cling alone, cling additives or a combination thereof so as to produce a cling force to the second layer of at least about  140  grams/inch as determined by ASTM D 5458 - 94 , and said second outer layer having a kinetic coefficient of friction value of below about  1 . 0  to a layer of itself; 
       (c) a puncture resistant, inner polymeric layer, located between said first outer layer and said second outer layer, said puncture resistant layer comprising at least  40  weight percent of a polyethylene copolymer or terpolymer resin, said polyethylene copolymer or terpolymer resin having a melt index of from  0 . 5  to  10  g/ 10  min., and a melt flow ratio (I 20   /I   2   ) of from  12  to  22 ;   
       (d) a tear resistant, inner polymeric layer located adjacent to said puncture resistant inner layer said tear resistant layer comprising a high pressure low density polyethylene resin, said high pressure low density polyethylene resin having a density of from about  0 . 90  to about  0 . 935  g/cm 3    and a melt index of from about  0 . 5  to about  10  g/ 10  min;   
       so as to produce a stretch wrap film having a transverse direction tear resistance of at least  500  g/mil as determined by ASTM D 1922 , a machine direction tear resistance of a least about  175  g/mil as determined by ASTM D 1922 , and an F- 50  dart drop value of at least  150  g/mil as determined by ASTM D 1709 . 
     
     
       80. The stretch wrap film of  claim 79  wherein said first outer layer has sufficient cling resulting from inherent cling alone, cling additives or a combination thereof so as to produce a cling force to the second layer of least about  180  grams/inch. 
     
     
       81. The stretch wrap film of  claim 79  wherein said polyethylene resin of said puncture resistant layer has a density of from about  0 . 88  to about  0 . 94  g/cm 3   .   
     
     
       82. The stretch wrap film of  claim 81  wherein said puncture resistant layer comprises at least about  50  weight percent of said polyethylene resin. 
     
     
       83. The stretch wrap film of  claim 82  wherein the F- 50  dart drop value of said stretch wrap film is at least about  250  g/mil. 
     
     
       84. The stretch wrap film of  claim 82  wherein the transverse direction tear resistance of the stretch wrap film is at least about  600  g/mil. 
     
     
       85. The stretch wrap film of  claim 84  wherein the stretch wrap film has a transverse direction tear resistance of at least  700  g/mil. 
     
     
       86. The stretch wrap film of  claim 84  wherein the stretch wrap film has a machine direction tear resistance of at least about  225  g/mil. 
     
     
       87. The stretch wrap film of  claim 86  wherein the stretch wrap film has a machine direction tear resistance of at least about  275  g/mil. 
     
     
       88. The stretch wrap film of  claim 82  wherein the stretch wrap film has a force required to elongate the film  200 % of at least  1600  psi as determined by ASTM D 822  and a force required to elongate the film  250 % of at least  1800  psi as determined by ASTM D 822 . 
     
     
       89. The stretch wrap film of  claim 88  wherein the stretch wrap film has a force required to elongate the film  200 % of at least  2000  psi and a force required to elongate the film  250 % of at least  2250  psi. 
     
     
       90. The stretch wrap film of  claim 82  wherein said stretch wrap comprises from about  5  to about  20  weight percent of said first outer layer, from about  5  to about  20  weight percent of said second outer layer, from about  5  to about  40  weight percent of said tear resistant layer, and from about  40  to about  80  weight percent of said puncture resistant layer film. 
     
     
       91. The stretch wrap film of  claim 79  wherein said second outer layer comprises a linear low density polyethylene resin, said linear low density polyethylene having a density of from about  0 . 925  to about  0 . 945  g/cm 3    and a melt index of from about  2 . 0  to about  5 . 0  g/ 10  min.   
     
     
       92. The stretch wrap film of  claim 79  wherein said polyethylene resin of said puncture resistant layer is made with a metallocene catalyst. 
     
     
       93. The stretch wrap film of  claim 79  wherein said cling force is partially from at least one cling additive. 
     
     
       94. The stretch wrap film of  claim 93  wherein said cling additive is poly- isobutylene.   
     
     
       95. The stretch wrap film of  claim 79  wherein said cling force is partially from n-hexane extractables. 
     
     
       96. A multilayer, stretch wrap film that contains at least four polymeric film layers comprising: 
       (a) a first outer polymeric layer comprising about  5  to about  20  weight percent polyethylene methyl acrylate, said polyethylene methyl acrylate having a melt index of from about  3  to about  7  g/ 10  min., said first outer polymeric layer being a cling layer; 
       (b) a second outer polymeric layer comprising an antiblock additive and about  2  to about  40  weight percent of a resin chosen from the group consisting of a linear lower density polyethylene and a polypropylene resin, said linear lower density having a melt index of from about  2  to about  5  g/ 10  min., said polypropylene resin having a melt flow ratio of from about  3  to about  10  and a density of from about  0 . 925  to about  0 . 945  g/cm 3   , said second outer polymeric layer being a slip layer, said first outer layer has sufficient cling resulting from inherent cling alone, cling additives or a combination thereof so as to product a cling force to the second layer of at least about  180  grams/inch as determined by ASTM D 5458 - 94 , and said second outer layer having a kinetic coefficient of friction value of below about  1 . 0  to a layer of itself;   
       (c) a puncture resistant, inner polymeric layer, located between said first outer layer and second outer layer, said puncture resistant layer comprising at least  40  weight percent of a copolymer of ethylene and hexene prepared using a metallocene catalyst, said copolymer having melt index of from about  1  to aboug  5  g/ 10  min., and a melt flow ratio (I 20   /I   2   ) of from about  16  to about  18 ; and  
       (d) a tear resistant, inner polymeric layer located adjacent to said puncture resistant layer, said tear resistant layer comprising about  5  to about  20  weight percent of a resin that produces a film having a transverse direction tear resistance than a film produced by the resins used to construct said puncture resistant layer and said first outer layer and said second outer layer, said resin having a melt index of about  1  to about  2 . 5  g/ 10  min.;  
       so as to produce a stretch wrap film having a transverse direction tear resistance of at least  700  g/mil as determined by ASTM D 1922 , a machine direction tear resistance of a least about  225  g/mil as determined by ASTM D 1922 , an F- 50  dart drop value of at least  250  g/mil as determined by ASTM D 1709 , a force required to elongate to the film  200 % of at least  2000  psi as determined by ASTM D 882  and a force required to elongate the film  250 % of at least  2250  psi as determined by ASTM D 882 .