Claims
- 1. A paper material for use in the manufacture of paper articles such as file folders comprising a paper web including cellulosic fibers and expanded microspheres, the paper web having a density of from about 7.0 to about 12.0 lb/3000 ft2/mil and a caliper after calendering of from about 11.0 to about 18.0 mils wherein the paper web has edges which exhibit an improved resistance to inflicting cuts upon human skin.
- 2. The paper material of claim 1 wherein the paper web has a density of from about 7.5 to about 9.0 lb/3000 ft2/mil.
- 3. The paper material of claim 1 wherein the paper web has a caliper of about 14.0 to about 16.0 mils.
- 4. The paper material of claim 1 wherein the expanded microspheres in the paper web comprise synthetic polymeric microspheres and comprise from about 0.5 to about 5.0 wt. % of the total weight of the web on a dry basis.
- 5. The paper material of claim 1 wherein the expanded microspheres in the paper web comprise synthetic polymeric microspheres and comprise from about 1.0 to about 2.0 wt. % of the total weight of the web on a dry basis.
- 6. The paper material of claim 1 wherein the paper web has a basis weight of from about 80 lb/3000 ft2 to about 300 lb/3000 ft2.
- 7. The paper material of claim 1 wherein the paper web has a basis weight of from about 120 lb/3000 ft2 to about 150 lb/3000 ft2.
- 8. The paper material of claim 1 wherein the expanded microspheres in the paper web comprise microspheres made from a polymeric material selected from the group consisting of methyl methacrylate, ortho-chlorostyrene, polyortho-chlorostyrene, polyvinylbenzyl chloride, acrylonitrile, vinylidene chloride, para-tert-butyl styrene, vinyl acetate, butyl acrylate, styrene, methacrylic acid, vinylbenzyl chloride and combinations of two or more of the foregoing.
- 9. The paper material of claim 1 wherein the fibers in the paper web comprise from about 30 to about 100% by weight dry basis softwood fibers and from about 70 to about 0% by weight dry basis hardwood fibers.
- 10. The paper material of claim 1 wherein the microspheres have an expanded diameter of from about 30 to about 60 microns.
- 11. The paper material of claim 1 wherein the microspheres are dispersed within the furnish in an unexpanded state and subsequently expand as the paper web dries.
- 12. The paper material of claim 1 wherein the paper material exhibits a Cutting Index of less than about 40 when analyzed according to the Cutting Index 30 test.
- 13. A method for making a paper material having a reduced tendency to cut human skin comprising providing a papermaking furnish containing cellulosic fibers and from about 0.5 to about 5.0 wt % by weight dry basis expanded or expandable microspheres, forming a fibrous web from the papermaking furnish, drying the web, and calendaring the web to a caliper of from about 11.0 to about 18.0 mils and a density ranging from about 7.0 to about 12.0 lb/3000 ft2/mil.
- 14. The method of claim 13 wherein the web has a density of from about 7.5 to about 9.0 lb/3000 ft2/mil.
- 15. The method of claim 13 wherein the web has a caliper of about 14.0 to about 16.0 mils.
- 16. The method of claim 13 wherein the microspheres in the web comprise synthetic polymeric microspheres and comprise from about 0.5 to about 5.0 wt. % of the total weight of the web on a dry basis.
- 17. The method of claim 13 wherein the microspheres in the web comprise synthetic polymeric microspheres and comprise from about 1.0 to about 2.0 wt. % of the total weight of the web on a dry basis.
- 18. The method of claim 13 wherein the web has a basis weight of from about 80 lb/3000 ft2 to about 3000 lb/3000 ft2.
- 19. The method of claim 13 wherein the web has a basis weight of from about 120 lb/3000 ft2 to about 150 lb/3000 ft2.
- 20. The method of claim 13 wherein the microspheres in the web comprise microspheres made from a polymeric material selected from the group consisting of methyl methacrylate, ortho-chlorostyrene, polyortho-chlorostyrene, polyvinylbenzyl chloride, acrylonitrile, vinylidene chloride, para-tert-butyl styrene, vinyl acetate, butyl acrylate, styrene, methacrylic acid, vinylbenzyl chloride and combinations of two or more of the foregoing.
- 21. The method of claim 13 wherein the fibers in the web comprise from about 30 to about 100% by weight dry basis softwood fibers and from about 70 to about 0% by weight dry basis hardwood fibers.
- 22. The method of claim 13 wherein the microspheres have an expanded diameter of from about 30 to about 60 microns.
- 23. The method of claim 13 wherein the microspheres are dispersed within the fibers in an unexpanded state and subsequently expand as the paper web dries.
- 24. The method of claim 13 wherein the web exhibits a Cutting Index of less than about 40 when analyzed according to the Cutting Index 30 test.
- 25. A file folder or jacket comprising a paper web including wood fibers and expanded microspheres dispersed within the fibers and having a density of from about 7.0 to about 12.0 lb/3000 ft2/mil and a caliper of from about 11.0 to about 18.0 mils wherein the paper web is die cut to provide a blank having exposed edges and the blank is formed into a file folder or jacket and wherein the edges of said folder or jacket exhibit an improved resistance to inflicting cuts upon human skin.
- 26. The file folder or jacket of claim 25 wherein the paper web has a density of from about 7.5 to about 9.0 lb/3000 ft2/mil
- 27. The file folder or jacket of claim 25 wherein the paper web has a caliper of about 14.0 to about 16.0 mils.
- 28. The file folder or jacket of claim 25 wherein the expanded microspheres in the paper web comprise synthetic polymeric microspheres and comprise from about 0.5 to about 5.0 wt. % of the total weight of the web on a dry basis.
- 29. The file folder or jacket of claim 25 wherein the expanded microspheres in the paper web comprise synthetic polymeric microspheres and comprise from about 1.0 to about 2.0 wt. % of the total weight of the web on a dry basis.
- 30. The file folder or jacket of claim 25 wherein the paper web has a basis weight of from about 80 lb/3000 ft2 to about 300 lb/3000 f2.
- 31. The file folder or jacket of claim 25 wherein the paper web has a basis weight of from about 120 lb/3000 ft2 to about 150 lb/3000 ft2
- 32. The file folder or jacket of claim 25 wherein the expanded microspheres in the paper web comprise microspheres made from a polymeric material selected from the group consisting of methyl methacrylate, ortho-chlorostyrene, polyortho-chlorostyrene, polyvinylbenzyl chloride, acrylonitrile, vinylidene chloride, para-tert-butyl styrene, vinyl acetate, butyl acrylate, styrene, methacrylic acid, vinylbenzyl chloride and combinations of two or more of the foregoing.
- 33. The paper material of claim 25 wherein the fibers in the paper web comprise from about 30 to about 100% by weight dry basis softwood fibers and from about 70 to about 0% by weight dry basis hardwood fibers.
- 34. The file folder or jacket of claim 25 wherein the microspheres have an expanded diameter of from about 30 to about 60 microns.
- 35. The file folder or jacket of claim 25 wherein the microspheres are dispersed within the wood fibers in an unexpanded state and subsequently expand as the paper web dries.
- 36. The file folder or jacket of claim 25 wherein the folder or jacket exhibits a Cutting Index of less than about 40 when analyzed according to the Cutting Index 30 test.
Parent Case Info
[0001] This application is a continuation-in-part of copending application Ser. No. 09/770,340 filed Jan. 26, 2001, which is a continuation-in-part of provisional application Serial No. 60/178,214, filed Jan. 26, 2000. This application also claims the benefit of provisional application Serial No. 60/282,983, filed Apr. 11, 2001.
Provisional Applications (2)
|
Number |
Date |
Country |
|
60178214 |
Jan 2000 |
US |
|
60282983 |
Apr 2001 |
US |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09770340 |
Jan 2001 |
US |
Child |
10121301 |
Apr 2002 |
US |