[미국특허]
Cut resistant paper and paper articles and method for making same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B29D-022/00
B29D-023/00
B32B-001/08
B32B-001/00
B65D-027/00
출원번호
US-0967074
(2004-10-15)
등록번호
US-7482046
(2009-01-27)
발명자
/ 주소
Williams,Richard C
Froass,Peter M
Boone,David A
Faber,Richard D
출원인 / 주소
International Paper Company
대리인 / 주소
Barnes, III,Thomas W.
인용정보
피인용 횟수 :
9인용 특허 :
70
초록▼
The specification discloses a method for making a paper material having a reduced tendency to cut human skin. The method includes providing a papermaking furnish containing cellulosic fibers and from about 0.5 to about 5.0 wt % by weight dry basis expandable microspheres, forming a paperboard web fr
The specification discloses a method for making a paper material having a reduced tendency to cut human skin. The method includes providing a papermaking furnish containing cellulosic fibers and from about 0.5 to about 5.0 wt % by weight dry basis expandable microspheres, forming a paperboard 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. Papers formed according to the method and articles formed therefrom are also disclosed.
대표청구항▼
What is claimed is: 1. A paper substrate, comprising cellulosic fibers and from 0.5 to 5.0 wt % of microspheres based upon the total weight of the substrate on a dry basis, wherein said substrate has a density of from 7.0 to 12.0 lb/3000 ft2/mil and reverse die cut edges which exhibit improved resi
What is claimed is: 1. A paper substrate, comprising cellulosic fibers and from 0.5 to 5.0 wt % of microspheres based upon the total weight of the substrate on a dry basis, wherein said substrate has a density of from 7.0 to 12.0 lb/3000 ft2/mil and reverse die cut edges which exhibit improved resistance to inflicting cuts upon human skin. 2. The paper substrate according to claim 1, wherein the microspheres comprises synthetic polymeric microspheres. 3. The paper substrate according to claim 1, wherein the expanded microspheres are made from at least one material selected from the group consisting of methyl methacrylate, ortho-chlorostyrene, polyortho-chiorostyrene, polyvinylbenzyl chloride, acrylonitrile, vinylidene chloride, para-tert-butyl styrene, vinyl acetate, butyl acrylate, styrene, methacrylic acid, and vinylbeazyl chloride. 4. The paper substrate according to claim 1, wherein the fibers comprise at least 30 wt % softwood fibers by weight dry basis. 5. The paper substrate according to claim 1, wherein the fibers comprise not morc than 70 wt % hardwood fibers by weight dry basis. 6. The paper substrate according to claim 1, wherein said substrate has a Cutting Index of less than 40 when analyzed according to the Cutting Index 30 test. 7. The paper substrate according to claim 1, wherein said miorospheres are expanded, unexpanded, or mixtures thereof. 8. The paper substrate according to claim 1, wherein said microspheres comprise at least one volatile fluid. 9. The paper substrate according to claim 1, wherein said microspheres are dispersed within the cellulosic fibers. 10. The paper substrate according to claim 1, wherein the substrate is a folder or jacket. 11. The paper substrate according to claim 1, wherein the substrate is calendared. 12. The paper substrate aocordihg to claim 1, wherein said substrate has a caliper of from 11.0 to 18.0. 13. A method of making the paper substrate according to claim 1, comprising contacting said cellulosic fibers with said microspheres. 14. The method according to claim 13, comprising contacting said cellulosic fibers wit said microspheres at prior to a headbox of a papermaking machine. 15. The method according to claim 13, wherein the microspheres are expanded, unexpanded, or mixtures thereof. 16. The method according to claim 13, further comprising drying said substrate. 17. The method according to claim 13, further comprising calendaring said substrate. 18. A paper substrate, comprising cellulosic fibers and from 0.5 to 5.0 wt % of microspheres based upon the total weight of the substrate on a dry basis, wherein said substrate has a caliper of from 11.0 to 18.0 and reverse die cut edges which exhibit improved resistance to inflicting cuts upon human skin. 19. The paper substrate according to claim 18, wherein the microspheres comprises synthetic polymeric microspheres. 20. The paper substrate according to claim 18, wherein the expanded microspheres are made from at least one material selected from the group consisting of methyl methacrylate, ortho-chlorostyrene, polyortho-chiorostyrene, polyvinylbenzyl chloride, acrylonitrile, vinylidene chloride, para-tert-butyl styrene, vinyl acetate, butyl acrylate, styrene, methacrylic acid, and vinylbenzyl chloride. 21. The paper substrate according to claim 18, wherein the fibers comprise at least 30 wt % softwood fibers by weight dry basis. 22. The paper substrate according to claim 18, wherein the fibers comprise not more than 70 wt % hardwood fibers by weight dry basis. 23. The paper substrate according to claim 18, wherein said substrate has a Cutting Index of less than 40 when analyzed according to the Cutting Index 30 test 24. The paper substrate according to claim 18, wherein said microspheres are expanded, unexpanded, or mixtures thereof. 25. The paper substrate according to claim 18, wherein said microspheres comprise at least one volatile fluid. 26. The paper substrate according to claim 18, wherein said microspheres are dispersed within the cellulosic fibers. 27. The paper substrate according to claim 18, wherein the substrate is a folder or jacket. 28. The paper substrate according to claim 18, wherein the substrate is calendared. 29. The paper substrate according to claim 18, wherein the substrate has a density of from 7.0 to 12.0 lb/3000ft 2 mil. 30. A method of making the paper substrate according to claim 18, comprising contacting said cellulosic fibers with said microspheres. 31. The method according to claim 30,comprising contacting said cellulosic fibers with said microspheres at prior to a headbox of a papermaking machine. 32. The method according to claim 30, wherein the microspheres are expanded, unexpanded, or mixtures thereof. 33. The method according to claim 30, further comprising drying said substrate. 34. The method according to claim 30, comprising calendaring said substrate.
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