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1. 发明专利

JPH10228128A RECORDING PAPER 失效
公开(公告)号：JPH10228128A
公开(公告)日：1998-08-25
申请号：JP2902197
申请日：1997-02-13
申请人： FUJI XEROX CO LTD , OJI PAPER CO
发明人： HOSOMURA HIROYOSHI , HARADA KATSUMI , ASAKA KAZUO , KURIHARA TSUTOMU , KATO MASARU , WATANABE HARUMI
IPC分类号： G03G7/00 , B41M5/00 , B41M5/26 , B41M5/382 , B41M5/40 , B41M5/50 , B41M5/52 , D21H19/10
摘要： PROBLEM TO BE SOLVED: To obtain recording paper fit for an electrophotographic system, an ink jetting system and a heat melting-transferring system, causing no trouble during paper feed and capable of maintaining satisfactory rigidity and bending strength even when the density is reduced to without using a low density bulking material or adopting a means of applying a tough outer layer. SOLUTION: Recording paper using virgin chemical pulp and/or the pulp of waste paper made from chemical pulp as principal stock is subjected to surface sizing treatment chiefly using starch to obtain the objective recording paper having 0.50-0.65g/cm density, 15-22cm rigidity in the transverse direction and 1×10 -1×10 Ω surface resistivity (JIS K6911) at 20 deg.C and 65% humidity. The ratio of the propagation velocity of the longitudinal wave of an ultrasonic pulse in the recording paper is 1.00-1.40.

2. 发明专利

JP2000147823A ELECTROPHOTOGRAPHIC COATED PAPER AND ITS PRODUCTION 失效
公开(公告)号：JP2000147823A
公开(公告)日：2000-05-26
申请号：JP31732098
申请日：1998-11-09
申请人： FUJI XEROX CO LTD
发明人： ASAKA KAZUO
IPC分类号： G03G7/00 , D21H19/10
摘要： PROBLEM TO BE SOLVED: To prevent winding on a heat fixing roll and blistering by adding chitosan in a step for making base paper. SOLUTION: In a step for making the base paper of electrophotographic coated paper, an aqueous solution of chitosan dissolved in an organic acid is added to improve the bonding strength among the fibers of pulp. Such a stiffness of the base paper and a bonding degree as to prevent winding on a heat fixing roll and blistering can be ensured. The optimum molecular weight of the chitosan is 50,000-2,000,000. In the case of 2,000,000, chitosan has a remarkably high flocculating property and preparation and addition to pulp become difficult, and if it is added, flocculating easily occurrs. The concentration of chitosan dissolved in paper stuff is preferably adjusted to 0.3-3.0 pts.wt. (expressed in terms of solid matter) based on 100 pts.wt. pulp.

3. 发明专利

JPH0764314A ELECTROPHOTOGRAPHIC TRANSFER FILM AND HEAT FIXING METHOD 失效
公开(公告)号：JPH0764314A
公开(公告)日：1995-03-10
申请号：JP23546693
申请日：1993-08-27
申请人： FUJI PHOTO FILM CO LTD , FUJI XEROX CO LTD
发明人： KOBAYASHI TAKASHI , TANI YOSHIO , HARADA KATSUMI , ASAKA KAZUO
IPC分类号： G03G7/00 , G03G13/20 , G03G15/20
摘要： PURPOSE:To produce a heat fixation type electrophotographic transfer film ensuring improved fixability of a toner image and improved embossing resistance and to provide a heat fixing method by which a sharp transparent image can be formed in any environment. CONSTITUTION:An image receiving layer 12 contg. a polymer, a surfactant and a matting agent, having 1X10 -1X10 omega surface electric resistance at 25 deg.C and 65% relative humidity and capable of forming an image by heat fixation of a toner is disposed on at least one side of a transparent substrate 11 to obtain the objective heat fixation type electrophotographic transfer film. The image receiving layer 12 is formed so as to regulate the angle of contact with a toner to be fixed or the resin binder of the toner to

4. 发明专利

JPH11227346A PRINTING INFORMATION PAPER, AND ITS MANUFACTURE 失效
公开(公告)号：JPH11227346A
公开(公告)日：1999-08-24
申请号：JP3596398
申请日：1998-02-18
申请人： FUJI XEROX CO LTD
发明人： ASAKA KAZUO , HARADA KATSUMI
IPC分类号： G03G7/00 , B41M5/00 , B41M5/382 , B41M5/40 , B41M5/50 , B41M5/52
摘要： PROBLEM TO BE SOLVED: To ensure specified stiffness and strength even when a paper is made light-weight, and improve the hard copy device adaptability, and the printing machine adaptability or the like by a method wherein a polyacrylamide based copolymer of which the weight average molecular weight is within a specified range, is added to paper stock. SOLUTION: In a printing-writing paper which is used for copying machines, facsimiles and digital printing machines, a polyacrylamide based copolymer of which the weight average molecular weight Mw is in a range of one million to five million, is added to the paper stock. Such a copolymer is preferable to be cationic one having a branched crosslinking structure or a graft structure, or one which is amphoteric. Also, the density of a paper to be made is set in a range of 0.40-0.85 g/cm , and the basic weight of the paper is set in a range of 30-60 g/m respectively. Then, such a printing information paper is manufactured in such a manner that after adding a filler and an internally added sizing agent in a raw material preparing process, the paper is made by adding the polyacrylamide based copolymer.

5. 发明专利

JPH06301228A ELECTROPHOTOGRAPHIC FILM FOR HEAT FIXATION 失效
公开(公告)号：JPH06301228A
公开(公告)日：1994-10-28
申请号：JP11372393
申请日：1993-04-16
申请人： FUJI PHOTO FILM CO LTD , FUJI XEROX CO LTD
发明人： KOBAYASHI TAKASHI , TANI YOSHIO , HARADA KATSUMI , ASAKA KAZUO
IPC分类号： G03G7/00
摘要： PURPOSE:To provide a heat fixation type electrophotographic film ensuring improved adhesion of a toner image and improved embossing resistance. CONSTITUTION:When an image receiving layer 12 contg. a binder made of a polymer having >=60 deg.C glass transition temp. and a matting agent is formed on at least one side of a transparent base 11, the surface electric resistance of the image receiving layer 12 at 25 deg.C and 65% relative humidity is regulated to 1X10 -1X10 OMEGA and a nonionic surfactant is incorporated into the layer 12. The objective heat fixation type electrophotographic film is obtd.

6. 发明专利

JPH0588400A ELECTROPHOTOGRAPHIC TRANSFERRED FILM AND COLOR IMAGE FORMATION 失效
公开(公告)号：JPH0588400A
公开(公告)日：1993-04-09
申请号：JP13704091
申请日：1991-05-14
申请人： FUJI PHOTO FILM CO LTD , FUJI XEROX CO LTD
发明人： SAKAI TAKASHI , JINBO KISHIO , MAKIYAMA KOICHI , KUBO MASAHIKO , SHOJI YOSHIO , ASAKA KAZUO , SUGIZAKI YUTAKA
IPC分类号： G03G7/00 , G03G13/08 , G03G15/01
摘要： PURPOSE:To provide an electrophotographic transferred film which excels in the fixing of full color images and forms full color projected images with high brightness and saturation and good color tone reproducibility, not causing a pseudo profile by a color image formation method using electrophotography. CONSTITUTION:In an electrophotographic transferred film, on at least one surface of a plastic film 101 with >=100 deg.C heat resistant temp. is provided a transparent resin layer 102 which is compatible with binding resin of a toner to be fixed at the toner fixing temp. and has lower apparent melt viscosity than that of the binding resin of the toner at the toner fixing temp. Color tone images consisting of toners at least containing a colorant and binding resin formed by electrophotography are formed on an electrophotographic transferred film to which heat and pressure are applied to form color images by fixing.

7. 发明专利

JPH11174719A PAPER FOR PRINTED INFORMATION AND ITS PRODUCTION 失效
公开(公告)号：JPH11174719A
公开(公告)日：1999-07-02
申请号：JP34265897
申请日：1997-12-12
申请人： FUJI XEROX CO LTD
发明人： ASAKA KAZUO , HARADA KATSUMI , HOSOMURA HIROYOSHI
IPC分类号： G03G7/00 , B41M5/00 , B41M5/50 , B41M5/52 , D21H17/24
摘要： PROBLEM TO BE SOLVED: To obtain a paper for printed information which maintains almost same stiffness and strength as those of a conventional paper even when it is made lightweight, which shows excellent adaptability for a hard copying machine and a printing machine and excellent handability as a document and a printed matter and which gives little influence on the environment by adding an acid soln. which dissolves chitosan in the production process of the paper. SOLUTION: In the production process of a paper for printed information, an acid soln. of chitosan is added so as to reinforce the bonds among fibers of a pulp and to improve its stiffness and strength. The chitosan used has >=100000 mol.wt., and the amt. of chitosan acid is controlled to 0.1 to 3.0 wt.% of the pulp solid content. The pulp used is prepared by beating to >=30 ml-csf Canadian standard water filtration degree. The acid soln. preferably contains an org. acid having >=90 mol.wt. The paper is preferably produced to have 0.40 to 0.85 g/cm density and 30 to 60 g/m basis weight.

8. 发明专利

JPH0728268A ELECTROPHOTOGRAPHIC FILM 失效
公开(公告)号：JPH0728268A
公开(公告)日：1995-01-31
申请号：JP19315993
申请日：1993-07-08
申请人： FUJI PHOTO FILM CO LTD , FUJI XEROX CO LTD
发明人： KOBAYASHI TAKASHI , TANI YOSHIO , HARADA KATSUMI , ASAKA KAZUO
IPC分类号： G03G7/00
摘要： PURPOSE:To provide an electrophotographic film hardly varying its surface electric resistance even under an environmental change, especially a considerable humidity change, exhibiting superior transferability at the time of copying, giving a high density image, less liable to cause triboelectric charge in a working process or during handling even at low humidity, excellent in conveyability and also excellent in scuffing resistance. CONSTITUTION:In an electrophotographic film obtd. by providing an image receiving layer 12 having 1X10 -1X10 OMEGA surface electric resistance at 25 deg.C and 65% relative humidity on at least one side of a transparent substrate 11, the image receiving layer 12 is composed of fine particles of an electric conductive metal oxide having

9. 发明专利

JPH0675419A ELECTROPHOTOGRAPHIC FILM 失效
公开(公告)号：JPH0675419A
公开(公告)日：1994-03-18
申请号：JP19483292
申请日：1992-06-29
申请人： FUJI PHOTO FILM CO LTD , FUJI XEROX CO LTD
发明人： KOBAYASHI TAKASHI , TANI YOSHIO , HARADA KATSUMI , ASAKA KAZUO
IPC分类号： G03G7/00
摘要： PURPOSE:To provide an electrophotographic film stably exhibiting excellent transferability and excellent conveyability even under an environmental change, especially a considerable humidity change. CONSTITUTION:When electric conductive underlayers 22a, 22b and image receiving layers 23a, 23b are successively formed on one side or both sides of a transparent plastic film 21 to obtain an electrophotographic film, the electric conductive underlayers 22a, 22b are composed of fine particles of an electric conductive metal oxide having -1X10 OMEGA.

10. 发明专利

JPH0619180A ELECTROPHOTOGRAPHIC FILM 失效
公开(公告)号：JPH0619180A
公开(公告)日：1994-01-28
申请号：JP19483192
申请日：1992-06-29
申请人： FUJI PHOTO FILM CO LTD , FUJI XEROX CO LTD
发明人： KOBAYASHI TAKASHI , TANI YOSHIO , HARADA KATSUMI , ASAKA KAZUO
IPC分类号： G03G7/00
摘要： PURPOSE:To improve adhesion property of toner picture images and embossing resistance by forming an image-receiving layer containing a polyester resin and chain-type colloidal silica and having specified surface resistance. CONSTITUTION:An image receiving layer 12 is formed on the surface of a transparent film 11. The image receiving layer 12 contains chain-type colloidal silica and polyester, and the colloidal silica is a dispersion liquid of fine particles of silica acid anhydride in water or an org. solvent such as alcohol. As for the colloidal silica, water-dispersion colloidal silica (silica sol) or org. solvent- dispersion colloidal silica is well-known. The fine particles of the water dispersion colloidal silica are stabilized with cation such as sodium ion. The org. solvent-dispersion colloidal silica is prepared by hydrophobidizing the surface of particles with hydroxyl groups and dispersing the particles in an org. solvent. The image receiving layer 12 has 1X10 -1X10 OMEGA (at 25 deg.C 65% RH) surface electric resistance. If the resistance is less than 1X10 OMEGA, the obtd. toner image has low density, and if the resistance exceeds 1X10 OMEGA, dust easily deposits.

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