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41. 发明专利

JPH03130190A SUBLIMATING THERMAL TRANSFER RECORDING INK SHEET 失效
公开(公告)号：JPH03130190A
公开(公告)日：1991-06-03
申请号：JP26820389
申请日：1989-10-17
申请人： RICOH KK
发明人： SHIMADA MASARU , MOCHIZUKI HIDEHIRO , MOROHOSHI NAOYA , KAMIMURA HIROYUKI
IPC分类号： B41M5/382 , B41M5/42
摘要： PURPOSE:To prevent an ink layer from becoming peeled apart and also an image receptor from receiving a thermally transferred image during recording by providing an adhesive layer consisting of polyvinylbutylal, an isocyanate compound and dye between a base and an ink layer. CONSTITUTION:In a sublimating thermal transfer recording ink sheet consisting of an ink layer of sublimating dye and a binder on a base, an adhesive layer of polyvinylbutylal, an isocyanate compound and dye is provided between the base and the ink layer. That is, the adhesive layer of polyvinylbutylal and an isocyanate compound is characteristic of excellent adhesion between the base and the ink layer. Consequently, it is possible to obtain a sublimating thermal transfer recording ink sheet which enables thermal transfer without deterioration of adhesive properties, deterioration of image density and also free from thermal fusion.

42. 发明专利

JPH03124493A SUBLIMATION TYPE THERMAL TRANSFER BODY 失效
公开(公告)号：JPH03124493A
公开(公告)日：1991-05-28
申请号：JP26212389
申请日：1989-10-09
申请人： RICOH KK
发明人： MOCHIZUKI HIDEHIRO , SHIMADA MASARU , MOROHOSHI NAOYA , KAMIMURA HIROYUKI
IPC分类号： B41M5/392
摘要： PURPOSE:To prevent fusion in speed-difference recording, defective travelling and the thermal transfer of an ink layer by specifying a dynamic friction coefficient to an image-receiving sheet of a sublimation type thermal transfer body in a recording method in which the image-receiving sheet and a recording medium are made to travel under specific conditions. CONSTITUTION:A sublimation type thermal transfer body and an image-receiving sheet are superposed, and both the thermal transfer body and the sheet are made to travel under the conditions of [speed of image-receiving sheet]/[speed of a recording medium]>1 or [feed rate of the image-receiving sheet]/[feed rate of recording medium]>1 and thermal printing is conducted. A dynamic friction coefficient to the image-receiving sheet of the sublimation type thermal transfer body is brought to 0.20 or less at 80 deg.C on measurement according to ASTMD1894 at that time. A dye sublimating and vaporizing at 60 deg.C or higher is used as a sublimating dye, and a vinyl chloride resin, a vinyl acetate resin, etc., are cited as a bonding agent. Condenser paper and a polyester film are employed as a base body sheet, and the kind of the bonding agent, the content of the sublimating dye, etc., are quoted as factors adjusting the dynamic friction coefficient.

43. 发明专利

JPH03101994A SUBLIMATION TYPE HEAT TRANSFER BODY 失效
公开(公告)号：JPH03101994A
公开(公告)日：1991-04-26
申请号：JP24025289
申请日：1989-09-18
申请人： RICOH KK
发明人： MOCHIZUKI HIDEHIRO , SHIMADA MASARU , MOROHOSHI NAOYA , KAMIMURA HIROYUKI
IPC分类号： B41M5/392
摘要： PURPOSE:To prevent the lowering of sensitivity, to increase recording density at an initial time and to obtain an excellent large-number of recording characteristics by forming an ink layer, in which a sublimating dye and a microcapsule containing the sublimating dye are dispersed into an organic binding agent, into a base body. CONSTITUTION:An ink laver in which a sublimating dye and a microcapsule including the sublimating dye are dispersed into an organic binding agent is shaped onto a base body. A plural kind of microcapsules, the glass transition temperatures Tg of microcapsule films of which differ, may also be used as the microcapsule when the Tg of a material constituting the film is kept within the temperature range of the ink layer at the time of thermal transfer printing. When size smaller than the thickness of the ink layer is used as the size of the microcapsule included in the ink layer, the microcapsule having uniform grain size may also be employed, and the microcapsule having nonuniform grain size may also be mixed.

44. 发明专利

JPH0386588A SUBLIMATION TYPE THERMAL TRANSFER MATERIAL 失效
公开(公告)号：JPH0386588A
公开(公告)日：1991-04-11
申请号：JP22152789
申请日：1989-08-30
申请人： RICOH KK
发明人： MOCHIZUKI HIDEHIRO , SHIMADA MASARU , MOROHOSHI NAOYA , KAMIMURA HIROYUKI
IPC分类号： B41M5/382 , B41M5/40
摘要： PURPOSE:To stabilize running properties without generating delamination or the lowering of sensitivity by providing a gradient to the content of the substance having lubricity or releasability in a dye transfer contributing layer in the longitudinal direction thereof so that the content of the substance having lubricity or releasability in the dye transfer contributing layer becomes much in the free surface part thereof. CONSTITUTION:A gradient is provided in the content of the substance having lubricity or releasability in a dye transfer contributing layer in the longitudinal direction thereof so that the content of the substance having lubricity or releasability in the dye transfer contributing layer becomes much in the free surface part thereof as compared with the part adjacent to a dye supply layer. The thickness of the transfer contributing layer is pref. 0.1 - 2mum and the thickness of the dye supply layer is pref. 0.5 - 8mum. As an embodiment of the substance having lubricity or releasability, there are a petroleum type lubricant such as liquid paraffin, a silicone type lubricating substance, a salt of higher fatty acid or the like. The content of said substance in the dye transfer contributing layer is pref. 0 - 10wt.% in the part adjacent to the dye supply layer and 1 - 30wt.% in the free surface part. The gradient of the content of the lubricant in the dye transfer contributing layer in the longitudinal direction thereof may be linear or stepwise.

45. 发明专利

JPH0379391A IMAGE RECEIVING MEDIUM FOR SUBLIMATION TYPE THERMAL TRANSFER 失效
公开(公告)号：JPH0379391A
公开(公告)日：1991-04-04
申请号：JP21487089
申请日：1989-08-23
申请人： RICOH KK
发明人： MOROHOSHI NAOYA , KAMIMURA HIROYUKI , MOCHIZUKI HIDEHIRO , SHIMADA MASARU
IPC分类号： B41M5/382 , B41M5/50 , B41M5/52
摘要： PURPOSE:To increase image density, to enhance the bonding strength between a substrate and a dye receiving layer and to improve the releasability of an image receiving medium and a transfer recording medium after recording by laminating a specific intermediate layer and the dye receiving layer to the substrate in this order. CONSTITUTION:An intermediate layer C mainly consisting of a resin having a hydroxyl group and an isocyanate compound and a dye receiving layer B mainly consisting of a thermoplastic polyester resin and silicone oil are laminated to an image receiving substrate A in this order. That is, since the intermediate layer C is provided between the image receiving substrate A and the dye receiving layer B, the image receiving substrate A receives no effect of the silicone oil in the dye receiving layer B and the bonding strength of the image receiving substrate A and the dye receiving layer B is kept high and the release between the image receiving substrate A and the dye receiving layer B after recording is prevented. By this method, image density is increased and the dye receiving layer is not released from a dye transfer layer after recording and the releasability between the dye receiving layer and the dye transfer layer is made excellent.

46. 发明专利

JPH02273292A IMAGE RECEIVING MEDIUM FOR SUBLIMATION TYPE THERMAL TRANSFER RECORDING 失效
公开(公告)号：JPH02273292A
公开(公告)日：1990-11-07
申请号：JP9476589
申请日：1989-04-14
申请人： RICOH KK
发明人： KAMIMURA HIROYUKI , SUZUKI AKIRA , SHIMADA MASARU , MOCHIZUKI HIDEHIRO
IPC分类号： B41M5/395 , B41M5/382 , B41M5/50 , B41M5/52
摘要： PURPOSE:To enhance dyeability, releasability, light fastness, preservability, hardness and friction resistance by providing a dye receiving layer based on a specific vinyl chloride resin and an isocyanate compound on a substrate. CONSTITUTION:A dye receiving layer B mainly consisting of a vinyl chloride resin containing a COOH group and an isocyanate compound is provided on an image receiving substrate A. A heat-sublimable dye is sublimed and diffused from a dye transfer layer 4 by the heat from a thermal head 1 and the sublimed dye is transferred to the dye receiving layer B of an image receiving medium. The sublimed dye transferred to the image receiving medium is diffused through the dyeable resin forming the dye receiving layer B to be fixed to said resin. In such a case that an elastic layer C is provided between the image receiving medium A and the dye receiving layer B, pressure is uniformly applied at the time of recording and a high density image improved in the close adhesiveness to a transfer recording medium and having no dropout is obtained. In such a case that the dye receiving layer has laminated constitution, the release agent in a surface dye receiving layer B2 becomes easy to be conc. in the vicinity of the surface thereof because of the presence of a cured receiving layer B1 and the hardness and surface friction resistance of the receiving layer are markedly enhanced.

47. 发明专利

JPH02233295A SUBLIMATION TYPE THERMAL TRANSFER RECORDING METHOD 失效
公开(公告)号：JPH02233295A
公开(公告)日：1990-09-14
申请号：JP5469089
申请日：1989-03-06
申请人： RICOH KK
发明人： MOCHIZUKI HIDEHIRO , SUZUKI AKIRA , SHIMADA MASARU , KAMIMURA HIROYUKI
IPC分类号： B41J2/32 , B41J2/325 , B41M5/382
摘要： PURPOSE:To prevent the color turbidity and ghost due to reverse transfer from an image receiving layer to an ink layer by forming a thin transparent layer to the dye receiving layer of an image receiving body after each color recording. CONSTITUTION:As the thin transparent layer 5 formed on the dye receiving surface of an image receiving body 1, a transparent resin film having good dyeability is pref. and a vinyl chloride/vinyl acetate copolymer film and a polyester resin film are especially pref. The thin transparent layer 5 is formed according to a method wherein a thin transparent layer forming solution prepared by mixing a release agent such as silicone oil with a resin having good dyeability if necessary is applied to a proper substrate composed of polyester or the like at first to form a thin transparent layer forming member which is, in turn, superposed on the image receiving body having a transfer image so as to bring the thin transparent layer into contact therewith to be heated by a hot roller while thermally fused to the image while the thin transparent layer is released from the substrate or a method wherein an aqueous emulsion of the aforementioned resin having good dyeability is applied or sprayed to the surface of the image to form the thin transparent layer.

48. 发明专利

JPH02233291A SUBLIMATION TYPE THERMAL TRANSFER RECORDING METHOD 失效
公开(公告)号：JPH02233291A
公开(公告)日：1990-09-14
申请号：JP5469389
申请日：1989-03-06
申请人： RICOH KK
发明人： KAMIMURA HIROYUKI , SUZUKI AKIRA , SHIMADA MASARU , MOCHIZUKI HIDEHIRO
IPC分类号： B41J2/32 , B41J2/325 , B41M5/382 , B41M5/40 , B41M5/50 , B41M5/52
摘要： PURPOSE:To obtain a sharp image by preventing the color turbidity or ghost due to many-time printing by providing an ink layer, wherein a dye supply layer wherein a sublimable dye is dispersed in an org. binder and a dye transfer contributing layer are successively laminated, on a substrate. CONSTITUTION:A thermal transfer recording medium having double-layer constitution wherein the ink layer 2 provided on a substrate is functionally divided into a comparatively thin transfer contributing layer having sublimation transfer function and a dye supply layer having function for diffusing and supplying a sublimed dye to said layer 5 is used in combination with an image receiving material wherein at least the surface thereof is composed of a curable resin. By controlling the sublimable dye so as to easily diffuse and supply the same from the dye supply layer to the transfer contributing layer in the dye amount consumed by sublimation transfer from the transfer contributing layer to a free surface, many-time printing is made possible. By using the image receiving material whose receiving layer is composed of a curable resin, the transferred dye can be prevented from the reverse transfer from the image receiving layer to the ink layer at the time of the printing of the next color and, therefore, a sharp image having no color turbidity and ghost is obtained.

49. 发明专利

JPH02231195A SUBLIMABLE THERMAL TRANSFER RECORDING METHOD 失效
公开(公告)号：JPH02231195A
公开(公告)日：1990-09-13
申请号：JP5151589
申请日：1989-03-03
申请人： RICOH KK
发明人： MOCHIZUKI HIDEHIRO , SUZUKI AKIRA , SHIMADA MASARU , KAMIMURA HIROYUKI
IPC分类号： B41M5/382 , B41M5/40
摘要： PURPOSE:To obtain an over head projector image free from the turbidity of color by a method wherein a sublimable thermal transfer recording medium provided with an ink layer containing a sublimable dye in an undissolved particle form is overlapped on a transparent image receiving sheet, the ink layer is thermally transferred, and a transferred image surface is thermally smoothened. CONSTITUTION:A sublimable thermal transfer recording medium 4 provided with an ink layer containing a sublimable dye in an undissolved particle form is overlapped on a transparent image receiving sheet 1, the ink layer is thermally transferred by a thermal head 5, and a transferred image surface on the image receiving sheet 1 is thermally smoothened by a heat roller 3. In the thermally smoothing treatment, the surface is depressed by the heat roller 3, a heat belt, or a heat resistant film having surface properties of a glossiness of pref. Gs (60 deg.C) >=50% to be heated to above the thermal deforming temp. of the image receiving layer, whereby the irregularities of the surface of the image receiving layer is smoothened. Scattering of light and color turbidity can be improved by applying the thermally smoothing treatment to the transferred image surface with irregularities.

50. 发明专利

JPH02229078A SUBLIMABLE THERMAL TRANSFER RECORDING METHOD 失效
公开(公告)号：JPH02229078A
公开(公告)日：1990-09-11
申请号：JP5066989
申请日：1989-03-02
申请人： RICOH KK
发明人： KAMIMURA HIROYUKI , SUZUKI AKIRA , SHIMADA MASARU , MOCHIZUKI HIDEHIRO
IPC分类号： B41M5/382 , B41M5/40 , B41M5/50 , B41M5/52
摘要： PURPOSE:To eliminate the possibility that an ink layer may thermally fuse to an image receiving body at the time of printing by a recoding method wherein a recording medium is overlapped on the image receiving body provided with a dye accepting layer consisting of a vinyl chloride resin on a substrate and heated from the side of the thermal transfer recording medium and, thereby, a sublimable dye is transferred to the image receiving body. CONSTITUTION:On a substrate, a dye supply layer 4 and a transfer contributing layer 5 are provided in this order from the side of the substrate. A sublimable dye is adjusted so as to be easily diffused and supplied from the dye supply layer 4 to the transfer contributing layer 5 by the amount to be consumed from the transfer contributing layer 5 through a free surface by a sublimable transfer method. In this manner, a multi-time printing can be conducted. In addition, the use of an image receiving body having an accepting layer of a vinyl chloride as an image receiving body in this invention allows a printing to be conducted with high releasability and stable sheet running properties during printing. Furthermore, the high thermal stability of the image receiving body after an image forming prevents a change of an image in storage.

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