IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0432620
(2001-12-05)
|
등록번호 |
US-7431798
(2008-10-07)
|
우선권정보 |
GB-0030132.5(2000-12-09) |
국제출원번호 |
PCT/GB01/005379
(2001-12-05)
|
§371/§102 date |
20030605
(20030605)
|
국제공개번호 |
WO02/046529
(2002-06-13)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Arjo Wiggins Fine Papers Ltd.
|
대리인 / 주소 |
Westerman, Hattori, Daniels & Adrian, LLP.
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
14 |
초록
▼
Security paper adapted to resist fraudulent alteration of toner-printed information thereon and to make such alteration or attempts at alteration evident has a maximum Scott-Bond strength of 150 J m-2; a Bendtsen roughness of not more than about 150 ml min-1; and is size press or otherwise treated w
Security paper adapted to resist fraudulent alteration of toner-printed information thereon and to make such alteration or attempts at alteration evident has a maximum Scott-Bond strength of 150 J m-2; a Bendtsen roughness of not more than about 150 ml min-1; and is size press or otherwise treated with a thermally-softenable polymer composition, for example acrylic polymer or copolymer, a polyvinyl acetate polymer, a vinyl acetate/ethylene copolymer, or a vinyl acetate/vinyl chloride/ethylene terpolymer. Preferably the paper has filler content of about 15% to about 20% by weight.
대표청구항
▼
The invention claimed is: 1. A paper adapted to receive toner-printed information thereon, wherein said paper: (a) has a maximum Scott-Bond strength of 150 J m-2; (b) has a Bendtsen roughness of not more than about 150 ml min-1; and (c) has been size pressed or otherwise treated with a thermally-so
The invention claimed is: 1. A paper adapted to receive toner-printed information thereon, wherein said paper: (a) has a maximum Scott-Bond strength of 150 J m-2; (b) has a Bendtsen roughness of not more than about 150 ml min-1; and (c) has been size pressed or otherwise treated with a thermally-softenable polymer composition, so that said paper is a security paper adapted to resist fraudulent alteration of toner-printed information thereon and to make such alteration or attempts at alteration evident, wherein internal cohesion of the paper is lower than inherent toner adhesion so that attempts to remove toner from the paper result in visually evident disruption of cellulose fibers in the paper. 2. Security paper as claimed in claim 1, wherein the Scott Bond strength of the paper is not more than 140 J m-2. 3. Security paper as claimed in claim 2, wherein the paper has a filler content of about 15 to 20% by weight. 4. Security paper as claimed in claim 3, wherein the paper has a Bendtsen roughness value in the range 60 to 100 ml min-1. 5. Security paper as claimed in claim 2, wherein the paper has a Bendtsen roughness value in the range 60 to 100 ml min-1. 6. Security paper as claimed in claim 1, wherein the paper has a filler content of about 15 to 20% by weight. 7. Security paper as claimed in claim 6, wherein the paper has a Bendtsen roughness value in the range 60 to 100 ml min-1. 8. Security paper as claimed in claim 3, wherein the paper has a filler content of at least about 15.4%. 9. Security paper as claimed in claim 6, wherein the paper has a filler content of at least about 17.8%. 10. Security paper as claimed in claim 6, wherein the paper has a filler content of at least about 18.4%. 11. Security paper as claimed in claim 1, wherein the paper has a Bendtsen roughness value in the range 60 to 100 ml min-1. 12. Security paper as claimed in claim 1, wherein the thermally softenable polymer composition is derived form a latex or a colloidal dispersion. 13. Security paper as claimed in claim 12, wherein the thermally softenable polymer is incorporated in a starch surface sizing composition. 14. Security paper as claimed in claim 1, wherein the thermally softenable polymer composition comprises an acrylic polymer or copolymer, a polyvinyl acetate polymer, a vinyl acetate/ethylene copolymer, or a vinyl acetate/vinyl chloride/ethylene terpolymer. 15. Security paper as claimed in claim 14, wherein the thermally softenable polymer is incorporated in a starch surface sizing composition. 16. Security paper as claimed in claim 1, wherein the thermally softenable polymer composition comprises a styrene-acrylic copolymer. 17. Security paper as claimed in claim 16, wherein the thermally softenable polymer is incorporated in a starch surface sizing composition. 18. Security paper as claimed in claim 17, wherein the ratio of starch:styrene-acrylic copolymer is from 95:5 to 85:15 on a dry weight basis. 19. Security paper as claimed in claim 18, wherein the starch:styrene-acrylic copolymer mixture is present in an amount of about 5-6% on a dry basis, based on total dry weight of paper. 20. Security paper as claimed in claim 19, wherein the final dry paper has a basis weight of about 95 gm-2 and a starch:styrene-acrylic copolymer mixture coatweight of about 2-2.5 gm-2 per side. 21. Security paper as claimed in claim 18, wherein the ratio of starch:styrene-acrylic copolymer is about 90:10, on a dry weight basis. 22. A security document comprising a security paper as claimed in claim 1. 23. Security paper as claimed in claim 1, comprising a security feature. 24. Security paper as claimed in claim 1, wherein internal cohesion of the paper is lower than inherent toner adhesion so that attempts to remove toner from the paper result in visually evident disruption of cellulose fibers in the paper. 25. Security paper as claimed in claim 24, wherein the paper has a filler content of about 15 to 20% by weight. 26. Alteration resistant and tamper evident security document comprising a toner-printed information carried on a security paper according to claim 1. 27. Security document as claimed in claim 26, which is a bank cheque. 28. Security paper as claimed in claim 1, wherein the Scott Bond strength of the paper is not more than 130 J m-2. 29. Security paper as claimed in claim 1, wherein the paper is a bank cheque paper which meets U.K. Clearing Bank Specification No. 1. 30. A method of producing a security document for the purpose of making toner-printed information subsequently applied to the security document more resistant to fraudulent alteration and of making such alteration or attempts at alteration evident, comprising: providing a paper which (a) has a maximum Scott-Bond strength of 150 J m-2; (b) has a Bendtsen roughness of not more than about 150 ml min-1; and (c) has been size pressed or otherwise treated with a thermally-softenable polymer composition, such that said paper is a security paper adapted to resist fraudulent alteration of toner-printed information thereon and to make such alteration or attempts at alteration evident, and forming a security document comprising said security paper. 31. Method as claimed in claim 30, wherein the paper is a bank cheque paper which meets U.K. Clearing Bank Specification No. 1.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.