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1. 发明专利

DE69809645T2 未知
公开(公告)号：DE69809645T2
公开(公告)日：2003-08-14
申请号：DE69809645
申请日：1998-07-03
申请人： CHEMITECH INC
发明人： IWASAKI TAKASHI , IGAUE SADATOSHI , SAITO TUTOMO
IPC分类号： G02F1/19 , B01J13/02 , G02F1/09 , G09F9/37
摘要： The microcapsule magnetic display sheet is sequentially provided thereon with a transparent front sheet, a microcapsule layer coated on the transparent front sheet and then a ultraviolet ray curable resin layer. The ultraviolet ray curable resin layer is formed by painting liquid ultraviolet raycurable resin on the microcapsule layer first and then hardeningit by irradiating it with UV rays. As the liquid ultraviolet ray curable resin can fill fine gaps of the microcapsules, no hollows left between the microcapsules and the UV resin layer. As the UV resin filled in gaps shares wording pressure, the microcapsules are fully protected and hardly be destroyed. After painting the liquid UV ray curable resin on the microcapsule layer and before it IS hardened, a separable film is covered on it. While a film is covered on it, the sheet is hard and if the film is separated, the sheet is soft. So the stiffness of the magnetic display sheet can be regulated by covering or not covering a film.

2. 发明专利

GB2324273A Gelatinised microcapsules for magnetic display sheets 未知
公开(公告)号：GB2324273A
公开(公告)日：1998-10-21
申请号：GB9810767
申请日：1995-08-07
申请人： CHEMITECH INC
发明人： IWASAKI TAKASHI , IGAUE SADATOSHI , OGURA ATUSHI
IPC分类号： B43L1/00 , G02F1/09
摘要： Gelatinised microcapsules 1 for magnetic display sheets containing magnetic powder 3 and non-magnetic powder 4, comprise a dispersion medium 5 composed of low boiling point solvent, optionally with a high boiling point solvent (>175‹C), the average particle diameter of the microcapsules being in the range 200-800 Ám.

3. 发明专利

DE19529264A1 未知
公开(公告)号：DE19529264A1
公开(公告)日：1996-02-22
申请号：DE19529264
申请日：1995-08-09
申请人： CHEMITECH INC
发明人： IWASAKI TAKASHI , IGAUE SADATOSHI , OGURA ATUSHI
IPC分类号： B43L1/00 , G02F1/09 , G02F1/19 , G01R33/032 , G09F9/00
摘要： Gelatinised microcapsules for magnetic display sheets containing magnetic powder 3 and non-magnetic powder 4, comprise dispersion medium 5 composed of a low boiling point solvent, optionally with a high boiling point solvent (>175 DEG C), the particle diameter of the microcapsules being in the range of 200 - 800 mu m. The magnetic display sheet is produced by coating the microcapsules 23 onto a transparent base film 21 and laminating a pressure-preventing film 25 onto the surface of the coating layer.

4. 发明专利

FR2723659A1 未知
公开(公告)号：FR2723659A1
公开(公告)日：1996-02-16
申请号：FR9509613
申请日：1995-08-08
申请人： CHEMITECH INC
发明人： IWASAKI TAKASHI , IGAUE SADATOSHI , OGURA ATUSHI
IPC分类号： B43L1/00 , G02F1/09 , G09F9/37 , B01J13/00 , G02F1/00
摘要： Gelatin microcapsules for magnetic display enclosing therein dispersion medium, magnetic powder and nonmagnetic powder, characterized in that that the dispersion medium in the microcapsules is composed of at least low boiling point solvent, particle diameter of the microcapsules is ion a range of 400 mu m tap 800 mu m and particles bigger than average are removed out. And solvents with boiling point higher than 175 DEG C., dispersant and suspension are contained in the dispersion medium, magnetic powder and nonmagnetic powder are affinity-treated. The microcapsule magnetic display sheet is produced by coating the above-described microcapsules. Therefore, recording speed and erasing speed are fast and recorded words or pictures are clear even if a magnetic force lower than 1100 gauss is used.

5. 发明专利

DE69809645D1 未知
公开(公告)号：DE69809645D1
公开(公告)日：2003-01-09
申请号：DE69809645
申请日：1998-07-03
申请人： CHEMITECH INC
发明人： IWASAKI TAKASHI , IGAUE SADATOSHI , SAITO TUTOMO
IPC分类号： G02F1/19 , B01J13/02 , G02F1/09 , G09F9/37
摘要： The microcapsule magnetic display sheet is sequentially provided thereon with a transparent front sheet, a microcapsule layer coated on the transparent front sheet and then a ultraviolet ray curable resin layer. The ultraviolet ray curable resin layer is formed by painting liquid ultraviolet raycurable resin on the microcapsule layer first and then hardeningit by irradiating it with UV rays. As the liquid ultraviolet ray curable resin can fill fine gaps of the microcapsules, no hollows left between the microcapsules and the UV resin layer. As the UV resin filled in gaps shares wording pressure, the microcapsules are fully protected and hardly be destroyed. After painting the liquid UV ray curable resin on the microcapsule layer and before it IS hardened, a separable film is covered on it. While a film is covered on it, the sheet is hard and if the film is separated, the sheet is soft. So the stiffness of the magnetic display sheet can be regulated by covering or not covering a film.

6. 发明专利

FR2723659B1 未知
公开(公告)号：FR2723659B1
公开(公告)日：1998-01-23
申请号：FR9509613
申请日：1995-08-08
申请人： CHEMITECH INC
发明人： IWASAKI TAKASHI , IGAUE SADATOSHI , OGURA ATUSHI
IPC分类号： B43L1/00 , G02F1/09 , G09F9/37 , B01J13/00 , G02F1/00
摘要： Gelatin microcapsules for magnetic display enclosing therein dispersion medium, magnetic powder and nonmagnetic powder, characterized in that that the dispersion medium in the microcapsules is composed of at least low boiling point solvent, particle diameter of the microcapsules is ion a range of 400 mu m tap 800 mu m and particles bigger than average are removed out. And solvents with boiling point higher than 175 DEG C., dispersant and suspension are contained in the dispersion medium, magnetic powder and nonmagnetic powder are affinity-treated. The microcapsule magnetic display sheet is produced by coating the above-described microcapsules. Therefore, recording speed and erasing speed are fast and recorded words or pictures are clear even if a magnetic force lower than 1100 gauss is used.

7. 发明专利

DE60227775D1 未知
公开(公告)号：DE60227775D1
公开(公告)日：2008-09-04
申请号：DE60227775
申请日：2002-12-23
申请人： CHEMITECH INC , TOCOM CORP
发明人： IWASAKI TAKASHI , YASUHARA TAKUYA , NONAKA KENJI , IGAUE SADATOSHI
IPC分类号： G02F1/09 , G02F1/17 , B43L1/00 , G09F9/37
摘要： Disclosed herein is a front face erasable microcapsule magnetophoretic display sheet having a support and a solid dispersion layer provided on one surface of the support and composed of microcapsules having an average particle diameter of 50 to 650 mu m, in which a liquid dispersion, a white pigment, additives and magnetic particles are encapsulated, and a binder. The magnetic particles include at least two kinds of magnetic particles different in particle diameter from each other. An erasing magnet for front face erasing and a writing magnet for front face erasable microcapsule magnetophoretic display sheet are also disclosed.

8. 发明专利

GB2324273B Microcapsules for magnetic display 未知
公开(公告)号：GB2324273B
公开(公告)日：1998-12-30
申请号：GB9810767
申请日：1995-08-07
申请人： CHEMITECH INC
发明人： IWASAKI TAKASHI , IGAUE SADATOSHI , OGURA ATUSHI
IPC分类号： B43L1/00 , G02F1/09
摘要： Gelatinised microcapsules 1 for magnetic display sheets containing magnetic powder 3 and non-magnetic powder 4, comprise a dispersion medium 5 composed of low boiling point solvent, optionally with a high boiling point solvent (>175‹C), the average particle diameter of the microcapsules being in the range 200-800 Ám.

9. 发明专利

GB2292119A Gelatinised microcapsules for magnetic display sheets 未知
公开(公告)号：GB2292119A
公开(公告)日：1996-02-14
申请号：GB9516173
申请日：1995-08-07
申请人： CHEMITECH INC
发明人： IWASAKI TAKASHI , IGAUE SADATOSHI , OGURA ATUSHI
IPC分类号： B43L1/00 , G02F1/09
摘要： Gelatin microcapsules for magnetic display enclosing therein dispersion medium, magnetic powder and nonmagnetic powder, characterized in that that the dispersion medium in the microcapsules is composed of at least low boiling point solvent, particle diameter of the microcapsules is ion a range of 400 mu m tap 800 mu m and particles bigger than average are removed out. And solvents with boiling point higher than 175 DEG C., dispersant and suspension are contained in the dispersion medium, magnetic powder and nonmagnetic powder are affinity-treated. The microcapsule magnetic display sheet is produced by coating the above-described microcapsules. Therefore, recording speed and erasing speed are fast and recorded words or pictures are clear even if a magnetic force lower than 1100 gauss is used.

10. 发明专利

DE19529264B4 未知
公开(公告)号：DE19529264B4
公开(公告)日：2006-04-13
申请号：DE19529264
申请日：1995-08-09
申请人： CHEMITECH INC , DAINIPPON INK & CHEMICALS
发明人： IWASAKI TAKASHI , IGAUE SADATOSHI , OGURA ATUSHI
IPC分类号： G02F1/09 , B43L1/00 , G01R33/032 , G02F1/19 , G09F9/00
摘要： Gelatin microcapsules for magnetic display enclosing therein dispersion medium, magnetic powder and nonmagnetic powder, characterized in that that the dispersion medium in the microcapsules is composed of at least low boiling point solvent, particle diameter of the microcapsules is ion a range of 400 mu m tap 800 mu m and particles bigger than average are removed out. And solvents with boiling point higher than 175 DEG C., dispersant and suspension are contained in the dispersion medium, magnetic powder and nonmagnetic powder are affinity-treated. The microcapsule magnetic display sheet is produced by coating the above-described microcapsules. Therefore, recording speed and erasing speed are fast and recorded words or pictures are clear even if a magnetic force lower than 1100 gauss is used.

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