WO2005118304A1 - 被記録媒体、該被記録媒体の製造方法、及び該被記録媒体を用いた画像形成方法 - Google Patents
被記録媒体、該被記録媒体の製造方法、及び該被記録媒体を用いた画像形成方法 Download PDFInfo
- Publication number
- WO2005118304A1 WO2005118304A1 PCT/JP2005/010455 JP2005010455W WO2005118304A1 WO 2005118304 A1 WO2005118304 A1 WO 2005118304A1 JP 2005010455 W JP2005010455 W JP 2005010455W WO 2005118304 A1 WO2005118304 A1 WO 2005118304A1
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- WIPO (PCT)
- Prior art keywords
- recording medium
- support
- ink
- alumina hydrate
- receiving layer
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
- B41M5/506—Intermediate layers
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
Definitions
- Recording medium method for manufacturing the recording medium, and image forming method using the recording medium
- the present invention relates to a recording medium, a support for the recording medium, a method for producing the same, and the recording medium.
- the present invention relates to an image forming method using a recording medium.
- a clear and high-quality recorded image can be obtained in the surface coating area, and the print surface is wavy due to the water-based ink.
- the present invention relates to a recording medium capable of alleviating a phenomenon called "recording medium” and a method for manufacturing the recording medium.
- the ink jet recording method which is frequently used, is a method in which fine droplets of ink are caused to fly according to various operating principles and adhere to a recording medium such as paper to record images, characters, and the like.
- a recording apparatus to which this recording method is applied has features such as high speed and low noise, easy multi-coloring, great flexibility in recording patterns, and no need for development and fixing.
- As a recording device it is rapidly spreading in various uses such as information equipment.
- an image formed by the multi-color ink jet method can obtain a record comparable to multi-color printing by the plate making method and printing by the color photographic method. Since is cheaper than ordinary multicolor printing and printing, it is being widely applied to the field of full-color image recording.
- the surface of the support Proposals for inkjet recording paper provided with a coating layer (see, for example, Japanese Patent Application Laid-Open No. 55-5.530), and non-use as a pigment in an ink receiving layer laminated on a support for a recording medium. It has been proposed to use crystalline silica (see, for example, JP-A-55-51858).
- cockling refers to a phenomenon in which the print surface of the recording medium is rough or wavy. As means for avoiding this cockling phenomenon, there have been proposed the following methods.
- Japanese Unexamined Patent Publication (Kokai) No. Heisei 3-3 876 7 gazette, Japanese Unexamined Patent Publication (Kokai) No. Heisei 3-190981, Japanese Unexamined Patent Publication (KOKAI) Heisei 7-2766786 No. 09 discloses a recording medium using paper having a specific range of water elongation and water immersion elongation.
- the technical concepts described in these documents are based on the premise that the entire recording medium is provided with uniform moisture, so that, as in the case of ink jet recording, a partially different liquid is applied. Cannot be handled.
- JP-A-10-44698 discloses a crosslinking treatment for forming a bonding structure between fibers by using a water-proofing agent, a polymer, a sizing agent, and the like. There is a disclosure that the lifting amount after 0 seconds is set to l mm or less. Also, Japanese Patent Application Laid-Open No. 2002-201597 proposes a recording medium in which cellulose fibers are shrunk by a mercerization treatment in which an alkali treatment is applied to the entire surface, and the recording medium is rubbed against an ink jet recording head. Is disclosed. These are all proposals for recording media without an ink receiving layer.
- JP-A-2000-1508805 discloses an ink-receiving layer containing a water-repellent component between an ink-receiving layer and a support.
- a void layer of a thermoplastic resin such as polyurethane is provided between the ink receiving layer and the support. It describes a configuration provided as an intermediate layer as a barrier for preventing ink penetration.
- Each of these intermediate layers acts as a barrier to prevent ink permeation, so for a large amount of ink, the printed ink does not penetrate to the support, so the ink absorption amount and ink absorption speed May decrease, causing ink overflow or bleeding.
- Japanese Patent Application Laid-Open No. 2002-212111 discloses a single-layer fibrous structure mainly composed of a fibrous substance containing no filler and not using a size material (no size).
- a recording medium in which an aqueous solution containing a cationic resin and alumina hydrate is applied to an ink receiving surface is disclosed.
- the cationic resin and the alumina hydrate can be present on the surface of the fibrous material, which can reliably trap the iron-on coloring material. It is described that, with respect to a 100% solid image, there is no cockling, there is little curling, and an excellent image can be formed.
- Japanese Patent Application Laid-Open No. 2000-240680 describes that a coating amount of 1 to 10 g / m 2 having an inorganic pigment and a binder is provided on a base material mainly composed of pulp fibers.
- a recording medium on which an ink receiving layer is formed is disclosed.
- Comparative Example 2 when an ink-receiving layer containing no binder was formed on the sized substrate, alumina hydrate, an inorganic pigment, entered the pulp fiber! /, Almost covering the pulp surface It was noted that they did not. : ' Disclosure of the invention
- the present inventor has studied various previously-proposed recording media such as those listed above, and found that any of the recording media particularly has an ink amount exceeding 100%. A new cockling / curling phenomenon was found during printing. Then, when the state was analyzed, it was found that the number of portions where the cockling had substantially increased increased, and as a result it became noticeable. In addition, the present inventor has found that when an image is formed by increasing the amount of ink applied to a recording medium by 2 to 3 times, the ink absorption capacity of the recording material itself decreases, They also found that ink overflow and bleeding occurred, and good image quality could not be obtained.
- the present invention is based on such a new finding: a main object is to solve a new problem.
- the present inventor pursued the phenomenon of deformation of the cracking mechanism, such as swelling and elongation of the fiber, and considered that the cause was excessive water absorption of the fiber and a large degree of freedom of displacement in the allowable space. Accordingly, the present invention has been completed by pursuing means capable of diffusing the water retention amount of the fiber itself so as to be suitable, and at the same time, controlling the degree of freedom of displacement.
- the first aspect of the present invention is to solve the above-described new problem that occurs when printing with an ink amount exceeding 100%, and to form an image having a high density and a clear color tone. It is an object of the present invention to provide a recording medium having an ink receiving layer capable of eliminating a new curl or cockling occurrence cause, and a method for manufacturing the recording medium.
- a second object of the present invention is to provide a high-density and clear color tone image without ink overflow even when the ink amount exceeds 10%, and a new cause of curling and cockling. It is an object of the present invention to provide a recording medium support (including a case where the substrate itself functions as an ink receiving layer) for solving the problem, and a method for producing the recording medium support. '
- the support is mainly composed of a fibrous substance, and is adjacent to the ink receiving layer of the support.
- the surface of the fibrous substance is covered with an alumina hydrate aggregate at a position where the surface is covered, and the ink receiving layer is mainly composed of a porous inorganic pigment.
- a recording medium characterized by the following.
- the range in which the surface coating region exists in the thickness direction of the support is preferably at least 20 ⁇ m, and the alumina hydrate aggregate in the surface coating region is It is preferable that the adhesive be attached to the surface of the fibrous substance and leave a space formed by the fibrous substance without closing.
- alumina hydrate aggregates and fibrous It is preferable to fill a minute gap that is much smaller than the gap, which is formed in the vicinity of or close to the gap.
- the porous inorganic pigment is at least one selected from porous silicic acid, porous calcium carbonate, porous magnesium carbonate, and alumina hydrate. It is preferable that the material has a site structure. More specifically, the amount of alumina hydrate adhering to the support is preferably 0.5 g / m 2 or more and 4 g Zm 2 or less per one surface. It is preferable that the fibrous substance is applied by on-machine coating. >
- a second embodiment according to the present invention relates to a method for manufacturing the above-described recording medium, which comprises applying an alumina hydrate aggregate to one surface of a support mainly composed of a fibrous substance, Forming a surface-covered region in which at least the surface of the particulate material is covered with an alumina hydrate aggregate; coating and drying an aqueous dispersion of a porous inorganic pigment on the surface-coated region;
- a method for producing a recording medium comprising: forming an ink receiving layer.
- a coating liquid containing a porous inorganic pigment and a binder as main components is coated with a coating amount of 5 g Zm 2 or more and 30 g Zm 2 or less in terms of dry solids. It is preferable to apply so that Further, in the above, it is preferable to use a base paper having a single-layer fibrous structure mainly composed of a fibrous substance containing no material and not subjected to surface sizing (no size).
- a third embodiment according to the present invention relates to a recording medium support for use in forming a recording medium having an ink receiving layer, which is mainly composed of a fibrous substance.
- a support for a recording medium characterized in that the support has a surface-covered region in which the surface is covered with an alumina hydrate aggregate.
- the range in which the surface coating region exists in the thickness direction of the support is preferably at least 20 ⁇ m.
- the alumina hydrate aggregate adheres to the surface of the fibrous substance, and It is preferable that the space formed by the fibrous material is left without being closed. In particular, in addition to this, it is preferable that the aggregate of alumina hydrate fills the minute gap much smaller than the void, where the fibrous substances are formed to cross or approach each other.
- a fourth embodiment according to the present invention is a method for manufacturing a support for a recording medium according to the above, wherein the support is not subjected to a surface sizing treatment to form the surface covering region.
- a method for producing a support for a recording medium comprising a step of applying a solution containing an alumina hydrate aggregate and not containing a binder or a cationic resin to base paper. Further, it is preferable to use a base paper having a single-layer fibrous structure, which is mainly composed of a fibrous substance containing no filler and does not use a size material (no size), as a support.
- the fifth embodiment according to the present invention relates to a recording medium mainly composed of a fibrous substance, to which ink droplets are directly applied (that is, an ink receiving layer is not formed).
- a recording medium characterized by having a surface coating region in which a surface of a substance is coated with alumina hydrate.
- the range in which the surface-covered region exists in the thickness direction of the support is preferably 20 ⁇ or more, and the alumina hydrate aggregate in the surface-covered region is:
- the adhesive be adhered to the surface of the fibrous substance and leave a gap formed by the fibrous substance without closing.
- the alumina hydrate aggregate fills minute gaps, which are much smaller than the voids, where the fibrous substances intersect or are close to each other.
- a sixth embodiment according to the present invention is the method for manufacturing a recording medium according to the above, wherein the fibrous material that has not been subjected to surface sizing to form the surface-covered region is made of alumina water.
- a method for producing a recording medium comprising a step of applying a solution containing a hydrate and containing no binder and no cationic resin.
- Another embodiment according to the present invention includes an image forming method in which an ink is applied to the above-described recording medium and printing is performed.
- the application of the ink droplets to the recording medium is performed by an ink jet method in which ink droplets are ejected from the fine holes and applied to the recording medium, or the ejection of the ink droplets is performed by the ink jet method. It is preferably carried out by applying thermal energy to the heat.
- the thickness of the support and the ink receiving layer is relatively thin (for example, 10 g Zm 2 or less)
- printing with an ink amount exceeding 100% is performed. Also, when printing is performed, the occurrence of curling and cockling after printing is small, ink absorption is good, and strike-through does not occur in the printed portion.
- a support having good ink absorbability can be obtained even when the thickness of the ink receiving layer is small. Even when printing with an ink amount exceeding 100%, the fiber surface is coated with alumina hydrate, so the surface state of the fibers and the size of the voids between the fibers become uniform. This makes it possible to uniformly diffuse the ink, and to prevent uneven expansion and elongation of the printing portion, thereby reducing cockling.
- a support having good ink absorption 14 can be obtained because the surface sizing is not performed. Further, by applying an alumina hydrate dispersion containing no binder, the fiber surface can be coated with alumina hydrate while maintaining the voids between the fibers. As a result, the ink can be uniformly diffused, and uneven expansion and elongation of the printed portion can be prevented, thereby reducing cockling. In addition, the production method of the present invention can perform on-machine coating, so that productivity is high.
- the fifth embodiment according to the present invention relates to a recording medium mainly composed of a fibrous substance.
- a recording medium mainly composed of a fibrous substance.
- the fibrous substance is coated with alumina hydrate, the ink absorption and curl are good.
- the sixth embodiment according to the present invention is a production method according to the present invention, and has high productivity because on-machine coating can be performed.
- FIG. 1 is a sectional view of a recording medium of the present invention. .
- FIG. 2 is an electron micrograph of the surface of the support 1 of the recording medium of the present invention. (1000x)
- FIG. 2A shows a further enlarged portion in the electron micrograph of FIG. Figure 2B is an electron micrograph of the electron micrograph of Figure 2A taken in section 2.2. (10,000 times)
- FIG. 2C is an electron microscope photograph of the surface of the electron microscope of the present invention, showing the surface of the support of the recording medium according to the present invention, which is taken by enlarging a portion surrounded by 2.3 in the electron microscope photograph of FIG. (10,000 times)
- FIG. 2D is an electron microscope photograph of the surface of the support 1 of the recording medium of the present invention, which is an electron microscope photographed by enlarging the portion enclosed by 2.4 in the electron microscope of FIG. 2A. (10,000 times)
- FIG. 2E is an electron micrograph of the surface of the support 1 of the recording medium of the present invention, taken by enlarging and photographing a portion surrounded by 2.5 in the electron micrograph of FIG. 2A. (10000x)
- Fig. 2EB is an electron micrograph of the electron micrograph of Fig. 2E, taken by enlarging the area enclosed in 2.5.2. (100,000 times) ''
- Fig. 2EC is an electron micrograph of the electron micrograph of Fig. 2E, which was taken by enlarging the part enclosed in 2.5.3. (100,000 times)
- FIG. 3 is an electron micrograph of the surface of the support 1 of the recording medium of the present invention. (1000x)
- FIG. 4 is a schematic diagram of a cross-sectional view showing a support for a recording medium of the present invention.
- FIG. 5 is a cross-sectional view showing the boundary between the support of the recording medium of the present invention and the ink receiving layer. Pattern diagram.
- FIG. 6 is a diagram showing the relationship between the amount of ink printed and the elongation percentage of the recording medium of the recording medium of Example 1 and Comparative Example 3 of the present invention.
- FIG. 7 is a schematic diagram for explaining an embodiment of the manufacturing process of the recording medium of the present invention. Detailed description of the invention
- the present invention will be described in more detail with reference to preferred embodiments.
- the present inventors have conducted various studies on the deformation of the support and the ink receiving layer due to ink implantation.
- the structure in which alumina hydrate is present on a support made of a fibrous substance, and an ink receiving layer mainly composed of a porous face is formed on the support particularly 100%
- the present invention has been made.
- an aqueous dispersion containing a porous inorganic pigment as a main component is applied to a support made of a fibrous material and containing alumina hydrate, and dried to form an ink receiving layer. It has been found that a recording medium capable of reducing the occurrence of cockling can be obtained.
- FIG. 1 is a schematic sectional view showing an example of a recording medium according to the present invention.
- the recording medium has a structure in which a porous ink receiving layer 2 (hereinafter, referred to as an ink receiving layer) is formed on a support 1 as shown in FIG.
- the interface between the support 1 and the ink receiving layer 2 has a boundary 9. Both have a neatly separated structure.
- the fibrous material constituting the support 1 is near the boundary 9, that is, near the position adjacent to the ink receiving layer 2 of the support 1, and at the surface of the fibrous material with the aggregate of alumina hydrate.
- the surface-covered region 4 may be the entire support, but in the example shown in FIG.
- the surface-covered region 4 of the support 1 is lower than the surface-covered region 4 (the side opposite to the ink receiving layer 2, that is, the back side) Is in a state where the fibrous material is not coated with alumina hydrate (42).
- the present invention Is not limited to the example shown in the figure, and it suffices if the surface covering region is provided at least at a position adjacent to the ink receiving layer of the support. Surface coating area
- the range of 4 in the thickness direction of the support may be appropriately set according to the purpose of the recording medium, but if it is at least about 20 ⁇ m, the effects of the present invention can be more reliably obtained. You can use it as a guide.
- FIGS. 2 and 3 are electron micrographs showing different portions of the surface of the support 1 of the recording medium according to the present invention, respectively, taken at ⁇ 1000 magnification. From these photographs, in the state where the magnification is 100 times larger, alumina hydrate having an average particle diameter of 30 nm covers the entire surface of the fibrous material, so that various types of adhesion and It can be seen that the state of aggregation and accumulation is formed. The space formed by the fibrous material remains without being closed. In FIG. 2, it was observed that a large amount of alumina hydrate was adhered to the region where the fibrous materials intersected or were close to each other and where the voids were smaller and overlapped.
- Figures 2B, 2C, 2D, and 2E are electron micrographs of a different portion of the surface taken in Figure 2 at 10,000x.
- Figure 2A shows each of the radiographed sites. From FIGS. 2B to 2E, it can be seen that the alumina hydrate covers the fibrous material in a partially, evenly distributed state.
- Figures 2EB and 2EC are electron micrographs of a different part of the surface taken in Figure 2E at a magnification of 100,000. Each radiograph is shown in Figure 2E. From FIG. 2 EB, it can be seen that a plurality of alumina hydrates are attached along the direction of the fiber in a state where they are aggregated to form an aggregate. On the other hand, Fig. 2 EC shows that the alumina hydrate aggregate weight on the alumina hydrate attached along the fiber direction It can be seen that there is a site forming coalescence.
- FIG. 4 is a drawing of an electron micrograph of a cross section of the support of the recording medium according to the present invention.
- the voids 7 and 8 are spaces formed by exposing the alumina hydrate 5 as shown in FIG.
- the “covered state” means a substantially covered state as viewed from an electron microscope photograph magnified 200 times.
- Substantial means that aggregates of alumina hydrate are present on the fiber surface as a whole, forming a porous body, as can be seen from an electron micrograph at a magnification of 1000 or more.
- the voids formed by the fibrous substances intersecting or approaching each other exist as they are, and in the fine gaps much smaller than the voids, the alumina hydrate concentrated portions 51 in which the alumina main product 5 is concentrated are formed. It is preferable that the minute gaps are filled with alumina hydrate.
- FIG. 5 is a drawing of an electron micrograph of a cross section of the recording medium (including the boundary portion 9 between the support 1 and the ink receiving layer 2) according to the present invention.
- the ink receiving layer 2 is formed of a porous inorganic pigment 3, and a void 6 exists between particles of the porous inorganic pigment 3.
- the fibrous material constituting the support 1 is in a state near the boundary 9 where the entire surface is coated with alumina hydrate '5 (hereinafter referred to as the surface-covered region 4). .
- the surface-covered region 4 As shown in Fig. 4, there are large voids 7 and small voids 8 between the fibers constituting the support 1, and the fibrous substance forming these voids is a surface coating.
- region 4 both are covered with alumina hydrate 5, and as shown in FIG. 4, voids 7 and 8 are spaces ′ formed with alumina hydrate 5 exposed. .
- Alumina hydrate concentrating portions 51 in which alumina hydrate aggregates 5 are concentrated are formed in smaller gaps formed by intersecting or adjacent fibrous substances. Porous alumina hydrate collection It has been buried by coalescence.
- the function of the above configuration will be explained, although it is estimated. Covering the entire surface of the fibrous material with alumina hydrate means that the aggregates of alumina hydrate are themselves forming micropores. As a result, while maintaining the ink (or liquid) absorption of the fiber itself, the dispersion of the fiber surface between the fibers is corrected to achieve a uniform surface, thereby achieving uniform ink absorption. Can be. As a result, the fiber absorbs the liquid and causes swelling and elongation. The force is appropriately regulated by the presence of alumina hydrate (excess is diffused to other parts to equalize the amount of water present). The degree of freedom is suppressed within a certain range.
- the diffusivity of the absorbed ink is improved, and fiber deformation caused by local abnormal expansion can be prevented.
- the fiber deformation rate can be suppressed by covering the fiber with alumina hydrate.
- the presence of a large amount of alumina hydrate in the minute gaps formed by the difference or closeness of the fibrous substance (it does not completely fill the holes) means that the strength of the fiber can be increased. it can.
- the configuration in which voids are left between fibers can absorb apparent changes by allowing fiber deformation due to ink absorption, and can reduce cockling.
- having an ink-receiving layer on the surface of the support provides an upper-language rule in which the fibers are deformed, and acts to smooth the overall displacement. It is considered that the combination of any of these configurations contributes to the effects of ink absorption, curling prevention, cockling prevention, and strikethrough prevention.
- the fibrous material constituting the support ordinary LBKP (hardwood bleached kraft knorep), mechanical pulp such as bulky cellulose fiber, mercerized cellulose, fluffed cellulose, and thermomechanical pulp are used. Added Mixing is good. If the pulp is blended in this manner, the rigidity of the formed support is increased, so that cockling becomes difficult.
- the bulky pulp is preferably added in an amount of 10% by mass to 30% by mass. Further, in the case where the paper as the support used in the present invention is produced using the pulp as described above, it is preferable not to perform the surface size treatment. This is because the gap between the fibers is filled by the surface sizing treatment, and the ink absorbability is reduced.
- the fibrous substance forming the support is so formed that the surface of the fiber is coated with alumina hydrate at least near the surface of one surface of the support.
- the alumina hydrate used in the above it is preferable to use alumina hydrate having a boehmite structure.
- the alumina hydrate having a boehmite structure has a high affinity for the ink (water or solvent) ', so that the ink absorption, penetration and diffusion speed of the support can be increased.
- alumina hydrate As a coating method of the alumina hydrate, on-machine coating is preferable. Immediately after paper-making, it is preferable to apply alumina hydrate, so that the desired fiber of the fibrous substance can be coated with alumina hydrate in a satisfactory state. Furthermore, it is most preferable to use a gate roll (see Fig. 7) for the coating device for coating alumina hydrate. When such an apparatus is used, the depth (thickness) at which the alumina hydrate penetrates and is applied to the support can be appropriately controlled.
- reference numerals 71, 72, 73, 74, and 75 denote a support, an alumina hydrate dispersion, an application roller, It represents the transport roller 1 and the alumina hydrate application section.
- porous inorganic pigment used for forming the ink receiving layer it is preferable to use porous silica.
- the porous inorganic pigment has a high porosity, and when the material is used as an ink receiving layer, the ink has good absorbability and ink permeability. According to the study of the present inventor, the effect of reducing cockling was greatest when the porous silica was used as the material for forming the ink receiving layer.
- the porous silica having the highest effect among the ink-receiving layer forming materials studied had a silica pore radius (pores within particles) of 12 nm.
- porous silica has pores having a large volume within a radius of 50 nm or less (see Japanese Patent Publication No. 63-229997). It is also known that voids between paper fibers have pores with a radius ranging from 0.2 Aim to 10 ⁇ (see Japanese Patent Publication No. Sho 62-55996).
- the printed recording medium absorbs the ink and changes its dimensions.
- cockling has been evaluated by measuring the height and period of the undulations (the number of undulations per unit length), and the elongation of the printed area.
- the measurement was performed based on the elongation percentage of the recording medium. This is because a recording medium having a small elongation is harder to recognize cockling by visual observation.
- the results for the examples are shown in FIG. 3, but when printed on a recording medium according to the present invention, the elongation percentage changes even when printing with an ink amount exceeding 100%. No cockling power was found. However, the conventional recording medium showed a considerable growth rate in this case, and cockling was recognized.
- the swell height does not vary much depending on the recording medium, and that it is the swell cycle that changes depending on the recording medium. For example, if the cycle of the swell becomes shorter, the swell becomes easier to visually recognize, and it is determined that cockling has occurred. Conversely, the swell period is long If so, cockling will not be easily recognized.
- the recording medium having the above-described configuration had the following effects when an image was formed. X.
- the recording medium having the above configuration can form the ink receiving layer at a high speed, and therefore has good productivity.
- the reason why cockling of the recording medium is reduced when an image is formed by applying an ink to the recording medium according to the present invention having the above-described configuration is as follows. This will be described with reference to FIG.
- the ink droplets printed on the recording medium are absorbed by the ink receiving layer 2 and then permeate and diffuse into the support 1. Cockling is irregular waviness of the recording medium (ie, waviness with a short period). If the ink absorption is uniform at this time, the waviness will be hardly recognized, The occurrence of rings can be reduced.
- the ink receiving layer 2 is composed of a porous layer mainly composed of the porous inorganic pigment 3 and the binder, it is possible to make the ink absorption uniform in the ink receiving layer 2. is there.
- the fibrous substance forming the support 1 is not uniform in shape, the radius (size) of the void formed between the fibers has a wide distribution, and it is difficult to make the ink absorption uniform. Regular swells occur.
- the surface of the fibrous substance near the boundary 9 with the ink receiving layer 2 is coated with alumina hydrate 5. .
- the large gap between the fibers in the surface coating portion region 4 has a smaller radius than the uncoated portion or portion.
- the minute gap is composed of alumina hydrate aggregates. It is concentrated and buried with alumina hydrate aggregates (the part indicated by 51 in Fig. 5).
- the radius of the voids is relatively uniform in the surface-covered region of the support constituting the recording medium according to the present invention, and the distribution of the radius of the voids is narrower compared to the case where no coating is performed. .
- the ink absorbed by the ink receiving layer 2 and penetrated into the surface coating region 4 of the support 1 adjacent to the ink receiving layer 2 is uniformly diffused.
- the base paper constituting the support 1 is in a state in which fine fibers called fiprils are entangled in addition to the cell wall portion by the beating treatment at the time of papermaking.
- the recording medium according to the present invention since the fibrous substance 41 in the surface covering region constituting the support 1 is covered with the alumina hydrate aggregate 5 as shown in FIG.
- the wetting 14 of the fiber entangled portion with the ink is also uniformed and substantially the same.
- the recording medium according to the present invention can make the permeation and diffusion of the ink permeated into the support 1 uniform.
- the alumina hydrate aggregate 5 adheres to the fibrous material 41 in the surface coating portion region constituting the support 1, thereby forming the fibrous material 41.
- the expansion rate and deformation rate after water absorption are suppressed and the size is reduced.
- the fibrous material 41 is covered with the alumina hydrate aggregate 5 so that the fibers are strongly bonded to each other.
- a chemical bond between the ink receiving layer 2 and the support 1 occurs due to the covering of the fibrous substance with the alumina hydrate aggregate 5.
- the present inventors presume that the occurrence of cockling of printed matter has been reduced by these.
- the recording medium according to the present invention has good ink absorbency. The reason is that even if the support 1 contains the alumina hydrate aggregate 5, as described above, large voids 7 exist between the fibrous substances in the surface coating region. Since the ink receiving layer 2 mainly composed of a porous inorganic pigment has voids 6, the voids are continuously connected at the interface 9 between the support 1 and the ink receiving layer 2. I guess it is because it is in the shape.
- the above-described configuration provides good ink absorbability even when the support and the ink receiving layer are thin, and strikes through even if a large amount of ink is applied to the ink receiving layer. Is also obtained.
- the recording medium according to the present invention comprises a support made of a fibrous substance and having alumina hydrate at least in the vicinity of one of its surfaces, coated with an aqueous dispersion containing a porous inorganic pigment as a main component.
- the color of the applied dispersion is determined by the color of the applied dispersion during the step of applying the ice dispersion containing the porous inorganic pigment as a main component. The color changes from white to slightly transparent at the moment of contact. From this result, it can be inferred that some reaction has occurred between the support and the dispersion. Also, the applied dispersion stays without penetrating the support. Due to this reaction, when the recording medium according to the present invention is manufactured, even when high-speed coating is performed, the porous structure of the ink receiving layer is maintained, and good ink free of cracks is generated. It is considered that a receiving layer can be formed.
- the support of the present invention is mainly composed of a fibrous substance.
- Cellulose pulp can be used as the fibrous substance.
- Specific examples include, for example, chemical (chemical) pulp such as sulphite pulp (SP), aluminum pulp (AP) and kraft pulp (KP) obtained from hardwood and softwood, semi-chemical pulp, and semi-chemical pulp.
- Chemical pulp, mechanical (mechanical) pulp, etc., and waste paper pulp, which is deinked secondary fiber can be used.
- Pulp can be used without distinction between unbleached pulp and bleached pulp, and beating and unbeaten pulp.
- beating or cellulose pulp is a non-wood pulp, such as grass, leaves, bast, and seed hair, such as straw, bamboo, hemp, bagasse, kenaf, mitsuma
- Pulp such as cotton linter can also be used.
- the present invention in addition to the above-mentioned cellulose pulp, it is possible to add and use at least one selected from bulky cellulose fibers, mercerized cellulose, fluffed cellulose, and mechanical pulp such as thermomechanical pulp. it can.
- the ink absorption speed and ink absorption amount of the obtained recording medium can be improved by adding the pulp to the pulp.
- the recording medium of the present invention in addition to the above-described cellulose pulp, fine fibrillar cellulose, crystallized cellulose, sulfate pulp, sulfite pulp, soda pulp, soda pulp, hemicellulase-treated pulp using hardwood or softwood as raw materials. Also, at least one selected from enzyme-treated enzyme pulp and the like can be added and used. The addition of these pulp has the effect of improving the smoothness of the obtained recording medium surface and improving the texture.
- any of a single-layer structure and a multilayer structure can be used as the fibrous substance forming the support, and there is no particular limitation.
- Preferable embodiments of the support having a multilayer structure include, for example, the structure described in JP-A-2000-210250.
- a filler can be added to the fibrous substance constituting the support, if necessary.
- white pigments such as light calcium carbonate and heavy calcium carbonate can be used.
- the existence of voids between fibers of the fibrous material is important. Therefore, when manufacturing a support, use non-size paper without surface size treatment. This is because, when producing paper, the conventional size press treatment with starch or the like fills voids between fibers. At the same time, it is because the fiber attachment of the alumina hydrate aggregate cannot be formed.
- the basis weight of the entire recording medium according to the present invention is not particularly limited as long as the basis weight is small and the recording medium is not extremely thin. For example, when the grammage is in the range of not less than 40 g / m 2 and not more than 300 g Zm 2 , it is preferable from the viewpoint of transportability when printing with a printer or the like.
- a more preferred range is one having a basis weight of not less than 45 g Zm 2 and not more than 200 g / m 2 . Within this range, the opacity can be increased without increasing the bending strength of the paper. Furthermore, when a large number of print samples are stacked, sticking is less likely to occur.
- alumina hydrate Since alumina hydrate has a positive charge, it has the advantage that an image having excellent color developability can be obtained by including it in the recording medium.
- the alumina hydrate is defined by the following general formula. .
- n represents one of integers from 0 3
- m is 0 to 1
- mH 2 O often refers to a detachable aqueous phase that does not participate in the formation of a crystal lattice, so that m can also take on non-integer values. However, m and n do not become zero at the same time.
- alumina hydrate having a boehmite structure by X-ray diffraction method has good ink absorption, coloring material adsorption and coloring properties. Most preferred.
- the alumina hydrate having a boehmite structure used in the present invention shows a boehmite structure by an X-ray diffraction method.
- Preferred materials include, for example, Patent Nos. 2714350 and 2771. Some of them are described in JP-A-43-51 and JP-A-27-114354.
- the alumina hydrate preferably used in the present invention has a porous structure.
- the range of alumina hydrates that are particularly preferable for reducing cockling include the following.
- the shape of alumina hydrate should be in the range of an average aspect ratio of 3 or more and 10 or less when it is flat.
- the average particle diameter is in the range of 1 nm or more and 50 nm or less.
- the average aspect ratio is preferably 3 or more and 10 or less, and the average particle length is 1 nm3 ⁇ 4 or more and 50 nm or less.
- the alumina hydrate used preferably has a BET specific surface area of 70 m 2 Zg or more and 30 Om 2 / g or less.
- the crystal thickness in the vertical direction on the (010) plane is preferably in the range of 6.0 nm or more and 15.0 nm or less.
- the measurement of various values of the above-mentioned alumina hydrate can be performed by using a method described in JP-A-2002-212112. (Method of manufacturing support)
- any commonly used paper manufacturing method can be applied.
- the paper machine can be selected from conventional fourdrinier paper machines, round net paper machines, cylinders, twin wires, and the like.
- an alumina hydrate is applied instead of the size press step performed in a usual paper manufacturing method.
- on-machine coating is preferable.
- a general coating method can be selected and used. For example, a gate roll coater, size press, Roh "co- ⁇ ⁇ data ' ⁇ . Play' Dokota, air knife coater ⁇ ⁇ , mouth 1 to Noreko 1 to data ' ⁇ blanking rush coater, a force Tenkota, gravure coater, a spray device, etc. Coating techniques can be employed.
- the coating amount of the alumina hydrate is preferably 0.5 gZni 2 or more and 4 gZm 2 or less per one surface.
- a more preferred range is lg / m 2 or more and 3 gZm 2 or less. Within this range, repelling of the liquid can be prevented in the process of applying alumina hydrate to the fibrous material.
- the surface strength of the support can be increased.
- a support obtained by subjecting an on-machine coated support to a calendering treatment or a super calendering treatment to smooth the surface, if necessary, can be used.
- the main materials constituting the ink receiving layer of the recording medium according to the present invention are a porous inorganic pigment and a binder.
- the porous inorganic pigment for example, it can be used by selecting from porous silica, porous calcium carbonate, porous magnesium carbonate, and the like. As mentioned earlier, porous silica is most preferred because of its large pore volume. .
- the binder of the ink receiving layer of the present invention can be freely selected from the following water-soluble polymers.
- polyvinyl alcohol or a modified product thereof cation-modified, anion-modified, silanol-modified product
- canoleboxymethinoresenolerose a modified product thereof, casein or a modified product thereof
- canoleboxymethinoresenolerose Gum arabic, hydroxyxetinoresenorelose, cellulose derivatives such as hydroxypropyl methylcellulose, SBR latex, NBR latex, conjugated copolymer latex such as methyl methacrylate-butadiene copolymer, functional
- a group-modified polymer latex a bullet-based copolymer latex such as an ethylene vinyl acetate copolymer, polyvinylpyrrolidone, male
- binders can be used alone or in combination of two or more. It is preferable that the mixing ratio of the porous inorganic pigment and the indica is 5 to 70 parts with respect to 100 parts by mass of the pigment. If the amount of the binder is smaller than the above range, the mechanical strength of the ink receiving layer may be insufficient and cracks and powder may be generated. If the amount of the binder is larger than the above range, the ink of the ink receiving layer may be used. Absorption may be reduced. In the recording medium according to the present invention, it is preferable to use a cationic substance for forming the ink receiving layer in order to improve the color development and the scratch resistance of the image.
- cation's biological materials examples include quaternary ammonium salts, polyamines, alkylamines, halogenated quaternary ammonium salts, cationic urethane resins, benzalkonium chloride, benzethonium chloride, and dimethyldiaryl. It can be appropriately selected from materials such as ammonium chloride polymer and used.
- the surface resistance of the recording medium can be controlled by controlling the amount of the electrolyte material such as the ionic substance contained in the ink receiving layer.
- the preferred range of surface resistance in the present invention IX 1 0 9 ⁇ port or a range of 1 X 1 0 12 ⁇ port.
- the recording medium may be charged while being conveyed in a device such as an ink jet recording device. When ink jet recording is performed on a charged recording medium, the ink may hit the recording medium and then bounce off to generate ink mist. By setting the surface resistance of the recording medium within the above range, the occurrence of such an ink mist can be reduced.
- the constituent materials of the ink receiving layer may further include a dispersant, a thickener, a ⁇ adjuster, a lubricant, a fluidity modifier, a surfactant, an antifoaming agent, a waterproofing agent, Agents, release agents, foaming agents, penetrants, coloring dyes, fluorescent brighteners, ultraviolet absorbers, antioxidants, preservatives, anti-pie agents, etc. can be added as necessary.
- a method of forming the ink receiving layer on a support includes preparing an aqueous dispersion comprising the above-described porous inorganic pigment, a binder and other additives, A method in which the dispersion is applied onto a support using a coating machine and dried can be used.
- the coating method used in this case includes a commonly used blade coater, air knife coater, roll coater, one bra, sosh coater-curtain coater, per coater, gravure coater, A coating technique using a spray device or the like can be employed.
- a more preferable range of the coating amount is 7 g / m 2 or more and 20 g Zm 2 or less. Within this range, the surface strength of the ink receiving layer can be increased. If necessary, after forming the ink receiving layer, the surface smoothness of the ink receiving layer can be improved by using a force render roll or the like.
- the image forming method according to the present invention provides printing by applying ink droplets to the surface of an ink receiving layer provided on a recording medium.
- the recording medium according to the present invention having the above-described configuration is used as a recording medium. It is characterized by using a recording medium.
- an ink mainly containing a colorant (dye or pigment), a water-soluble organic solvent, and water can be used.
- the dye for example, it is preferable to use a water-soluble dye represented by a direct dye, an acid dye, a basic dye, a reactive dye, an edible dye, and the like. Any combination can be used as long as it gives an image that satisfies the fixing performance, color development, clarity, stability, light fastness, and other required performance.
- the pigment carbon black or the like can be used.
- a method for preparing the pigment ink a method using a pigment and a dispersing agent in combination, a method using a self-dispersing pigment, a method for microencapsulating the pigment, and the like can be used.
- the water-soluble dye is generally used by dissolving it in water or a solvent comprising water and a water-soluble organic solvent.
- a solvent comprising water and a water-soluble organic solvent.
- water-soluble dyes are preferably used. Use a mixture with various organic solvents and the like. At this time, it is preferable to adjust the water content in the ink so as to be in the range of 20% by mass or more and 90% by mass or less.
- the water-soluble organic solvent include, for example, those having carbon atoms such as methyl alcohol.
- polyhydric alcohols such as polyhydric alcohols such as diethylene glycol, triethylene glycol monomethinole ether, and triethylene glycol monoethyl ether.
- Polyhydric alcohols are particularly preferable because they have a great effect as a lubricant for preventing nozzles from being reduced in clogging due to evaporation of water in the ink and precipitation of a water-soluble dye.
- a solubilizing agent can be added to the ink.
- Typical solubilizers include nitrogen-containing heterocyclic ketones, the purpose of which is to significantly improve the solubility of a water-soluble dye in a solvent.
- nitrogen-containing heterocyclic ketones the purpose of which is to significantly improve the solubility of a water-soluble dye in a solvent.
- N-methyl-2-pyrrolidone and 1,3-dimethyl-2-imidazolidinone are preferably used.
- additives such as a viscosity adjuster, a surfactant, a surface tension adjuster, a pH adjuster, and a specific resistance adjuster may be added.
- an inkjet IB recording method is preferable.
- any method may be used as long as the ink can be applied to the recording medium by effectively removing the ink from the fine holes (nozzles).
- the heat transfer method is described in Japanese Patent Application Laid-Open No. 54-59939.
- the ink that has been subjected to the action of energy causes a sudden change in volume, and the ink jet method of ejecting ink from the nozzles can be used particularly effectively by the action force due to this state change.
- Aqueous ink composition (total: 100 parts)
- a solid pattern of 15 O mm x 150 mm was printed in two colors (200%) in the center of the recording medium.
- the surface of the recording medium immediately after printing was visually observed, and evaluated on a three-point scale according to the following criteria. If cockling or paper deformation is not visible when observing the printed image from the front and oblique direction A, cockling is observed obliquely from the printed image, but cockling ⁇ paper when observing from the front If no deformation was observed, B was selected, and if a change such as cockling was clearly observed from the front of the printed image, C was determined.
- Elongation ratio length of print area after printing / length of print area before printing X 1 0 0
- each recording medium was brought into contact with the following liquid to determine the amount of absorptive liquid, and evaluated according to the following criteria. If liquids transfer amount at a contact time 25 msec 4 Oml / m 2 or more AA, the 3 Om 1 Zm 2 beyond 4 OML Zm 2 less than in the case A, the 2 Om 1 Zm 2 beyond 3 when it is less than om l Zm 2 B, when the case is less than the 1 OML Roh m 2 beyond 2 OML / m 2 is is C, the 1 OML Zm 2 was D.
- Aqueous ink having the following composition was used as the liquid to be used for the above measurement. .
- LBKP As raw pulp, commercially available LBKP was beaten with a double disc refiner to obtain 300 ml of Canadian Standard Freeness (CSF) beaten raw material (A). Similarly, commercially available LBKP was beaten with the same apparatus as the base layer to obtain 500 ml of the beaten raw material (B). And the refining raw material (A) and the refining raw material (B) Were mixed at a dry mass ratio of 9: 1 to obtain a papermaking raw material.
- CSF Canadian Standard Freeness
- a conventionally known alumina hydrate having a boehmite structure described in Example 1 of Japanese Patent No. 27144352 is dispersed in ion-exchanged water to obtain an alumina having a solid content of 10% by mass.
- a hydrate dispersion was prepared and used to prepare an on-machine coating liquid.
- FIG. 6 shows the results of the elongation percentage of the recording medium measured by the method described above for this example.
- Example 1 Using the same beating raw materials (A) and (B) as used in Example 1, making the same basis weight as in Example 1 using the same paper machine as in Example 1, making the same on as in Example 1. The same amount of alumina hydrate as in Example 1 was applied by a machine coating solution and a coating method. Further, a smoothing treatment was performed in the same manner as in Example 1 to obtain a support.
- Example 1 100 parts by mass of alumina hydrate having a boehmite structure described in Example 1 of Japanese Patent Application Laid-Open No. 9-999627, polybutyl alcohol (PVA 117, manufactured by Kuraray Co., Ltd.) 15 was dispersed in ion-exchanged water to prepare a coating dispersion having a dry solid content of 15% by mass.
- the obtained dispersion for coating was coated on the support obtained above with a bar, and then dried to form an ink receiving layer having a solid content of 10 g Zm 2 . Further, the surface of the ink receiving layer was smoothed in the same manner as in Example 1.
- the recording medium of the present example obtained above was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
- Example 1 Using the same beating raw materials (A) and (B) as in Example 1, using the same paper machine as in Example 1, making the same basis weight as in Example 1, on-machine coating as in Example 1 The same amount of alumina hydrate as in Example 1 was applied in the same manner as in Example 1 using the working fluid. Further, a smoothing treatment was performed in the same manner as in Example 1 to obtain a support.
- the same coating dispersion as in Example 1 was prepared using the same materials as in Example 1, and an ink receiving layer having a dry solid content of 7 g / m 2 was formed in the same manner as in Example 1. The surface of the ink receiving layer was smoothed in the same manner as in Example 1.
- the recording medium of the present example obtained above was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
- Example 1 Using the same beating raw materials (A) and (B) as in Example 1, making the same basis weight as in Example 1 using the same paper machine as in Example 1, the same on-machine coating as in Example 1 The same alumina hydrate as in Example 1 was applied by the method of application at a coating amount of 0.5 g / m 2 . A smoothing treatment was performed in the same manner as in Example 1 to obtain a support. Observation of the obtained support with an electron microscope on the portion coated with alumina hydrate showed that at least the surface of the fibrous material as shown in Fig. 5 was converted to alumina hydrate. Therefore, it was confirmed that the coating had a surface coating portion region in which a void was present in a coated state. The thickness of the surface coating area was 20 // m.
- Example 1 An ink receiving layer having the same coating amount as in Example 1 was formed using the same material as in Example 1 and in the same manner as in Example 1. The surface of the ink receiving layer was smoothed in the same manner as in Example 1. The recording medium of the present example obtained above was evaluated in the same manner as in Example 1, and the results are shown in Table 1. '
- Example 1 Using the same beating raw materials (A) and (B) as in Example 1, using the same paper machine as in Example 1, making the same basis weight as in Example 1, on-machine coating as in Example 1 Alumina hydrate having a coating amount of 4 g Zm 2 was applied by the same on-machine coating method as in Example 1 using the working fluid. In the same manner as in Example 1, smoothing treatment was performed to obtain a support. The obtained support was coated with alumina hydrate using an electron microscope; : Observation of the area where the surface was covered, as shown in Fig. 5, showed that at least the surface of the fibrous substance was covered with alumina hydrate and that there was a surface coating area where voids existed It was confirmed that. The thickness of the surface coating area was 4 Q ⁇ m.
- An ink receiving layer having the same coating amount as in Example 1 was formed using the same material as in Example 1 and in the same manner as in Example 1.
- the surface of the ink receiving layer was smoothed in the same manner as in Example 1.
- the recording medium of the present example obtained above was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
- Example 1 In place of the beating raw material (B) used in Example 1, a crosslinked pulp having a twisted structure as a bulky cellulose fiber (High Bulk Additive, trade name, manufactured by Wafer-Za-I-Par) was prepared. Using the refining raw material (C), using the refining raw materials (A) and (C), and using the same paper machine as in Example 1, making the same basis weight as in Example 1, papermaking was performed. The same amount of alumina hydrate as in Example 1 was applied in the same manner as in Example 1 using the same on-machine coating liquid as in Example 1. Implementation A smoothing treatment was performed in the same manner as in Example 1 to obtain a support.
- An ink receiving layer having the same coating amount as in Example 1 was formed using the same material as in Example 1 and in the same manner as in Example 1.
- the surface of the ink receiving layer was smoothed in the same manner as in Example 1.
- the recording medium of the present example obtained above was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
- Example 1 Using the same beating raw materials (A) and (B) as in Example 1, using the same paper machine as in Example 1, making the same basis weight as in Example 1, on-machine coating as in Example 1 The same amount of alumina hydrate as in Example 1 was applied in the same manner as in Example 1 using the working fluid. A smoothing treatment was performed in the same manner as in Example 1 to obtain a support. Porous calcium carbonate (Escalon # 150, manufactured by Sankyo Flour Milling Co., Ltd.) 100 parts by mass and polyvinyl alcohol (PVA 117, made of Kuraray clay) as a binder 20 parts by mass dispersed in ion-exchanged water Thus, a coating dispersion having a dry solid content of 20% by mass was prepared.
- Porous calcium carbonate (Escalon # 150, manufactured by Sankyo Flour Milling Co., Ltd.) 100 parts by mass
- PVA 117 polyvinyl alcohol
- Example 1 An ink receiving layer having the same coating amount as in Example 1 was formed in the same manner as in Example 1. In the same manner as in Example 1, the surface of the ink receiving layer was smoothed. The recording medium of the present example obtained above was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
- Example 1 Using the same beating raw materials (A) and (B) as in Example 1, using the same paper machine as in Example 1, making the same basis weight as in Example 1, on-machine coating as in Example 1 Example 1 The same amount of alumina hydrate was applied in the same manner as in Example 1 using the working fluid.
- a support was obtained by performing a smoothing treatment in the same manner as in Example 1.
- PVA 117 polybutyl alcohol
- Example 1 An ink receiving layer having the same coating amount as in Example 1 was formed in the same manner as in Example 1. did. In the same manner as in Example 1, the surface of the ink receiving layer was smoothed.
- the recording medium of this example obtained as described above was evaluated as in Example 1, and the results are shown in Table 1. '
- Example 1 Using the same beating raw materials (A) and (B) as in Example 1, using the same paper machine as in Example 1, making the same basis weight as in Example 1, on-machine coating as in Example 1 The same amount of alumina hydrate as in Example 1 was applied in the same manner as in Example 1 using the working fluid. A smoothing treatment was performed in the same manner as in Example 1 to obtain a support.
- the support obtained above was used as a recording medium of this example without forming an ink receiving layer.
- the thus-obtained recording medium of this example was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
- Example 1 Using the same beating raw materials (A) and (B) as in Example 1, making the same basis weight as in Example 1 using the same paper machine as in Example 1, smoothing as in Example 1 ' The reaction was performed to obtain a support. Alumina hydrate was not applied. The support obtained above was used as a recording medium of Comparative Example 1 without forming an ink receiving layer. The obtained recording medium of this comparative example was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
- Example 1 the same support as in comparative example 1 was used.
- Example 1 and The same coating dispersion as in Example 1 was prepared using the same material, and an ink receiving layer having the same coating amount was formed in the same manner as in Example 1.
- the surface of the ink receiving layer was smoothed in the same manner as in Example 1.
- the obtained recording medium of this comparative example was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
- FIG. 3 shows the results of the elongation percentage of the recording medium measured by the method described above for this comparative example.
- Example 2 The same commercially available LBKP as used in Example 1 as raw pulp was beaten with a double disc refiner to obtain 300 ml of Canadian Standard Freeness (C.S.F.) beaten raw material (A).
- Commercially available LBKP similar to that used in Example 1 was beaten with the same apparatus as the base layer to obtain a beating raw material (B) of 50 Om1.
- the obtained beaten raw material (A), beaten raw material (B), and porous silica (Mizukasil P-78A, manufactured by Mizusawa Chemical Co., Ltd.) are mixed at a dry mass ratio of 9: 1: 1.
- the raw materials for papermaking were adjusted.
- Example 2 the same support as in comparative example 4 was used.
- the same coating dispersion as in Example 2 was prepared using the same materials as in Example 2, and an ink receiving layer having the same coating amount as in Example 2 was formed.
- the surface of the ink receiving layer was smoothed in the same manner as in Example 2.
- the obtained recording medium of this comparative example was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
- Example 2 The same commercial LBKP as used in Example 1 was used as the raw pulp. Beat by Iscrifiner and Canadian Standard Freeness
- Example 1 300 ml of the beating raw material (A) was obtained.
- the same commercially available LBKP as used in Example 1 was beaten with the same apparatus as the base layer to obtain 50 Oml of the beaten raw material (B).
- the obtained beating raw material (A) and the beating raw material (B), and the alumina hydrate having a boehmite structure described in Example 1 of Japanese Patent No. 2714352 are converted to a dry mass ratio of 9%.
- the mixture was mixed at a ratio of 1: 1 to prepare a raw material for papermaking.
- Using the obtained paper stock is adjusted to a basis weight of 8 0 g Zin 2 in Fourdrinier Papermaking, to obtain a support by smoothing the surface with more super power render.
- Alumina hydrate was not applied.
- the support obtained above was used as a recording medium of Comparative Example 6 without forming an ink receiving layer.
- the obtained recording medium of this comparative example was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
- Example 1 the same support as in comparative example 6 was used. Then, the same coating dispersion as in Example 1 was prepared on the support using the same materials as in Example 1, and an ink receiving layer having the same coating amount was formed in the same manner as in Example 1. The surface of the ink receiving layer was smoothed in the same manner as in Example 1. The obtained recording medium of this comparative example was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
- Example 1 the same support as in comparative example 1 was used.
- the same coating dispersion as in Example 2 was prepared using the same materials as in Example 2, and the ink receiving layer (lower layer) having a dry solid content of 5 gZm 2 was prepared in the same manner as in Example 2. ) was formed.
- the same coating dispersion as in Example 1 was prepared using the same materials as in Example 1, and an ink receiving layer (upper layer) having a dry solid content of 10 g Zm 2 was formed in the same manner as in Example 1. .
- the surface of the ink receiving layer was smoothed in the same manner as in Example 1.
- the obtained recording medium of this comparative example was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
- Example 10> Using the same beating raw materials (A) and (B) as in Example 1, using the same paper machine as in Example 1, making the same basis weight as in Example 1, on-machine coating as in Example 1 The same alumina hydrate as in Example 1 was applied by the method of application at a coating amount of 0.4 g / m 2 . A smoothing treatment was performed in the same manner as in Example 1 to obtain a support. Observation of the obtained support with an electron microscope on the portion coated with alumina hydrate showed that at least the surface of the fibrous substance was covered with alumina hydrate as shown in Fig. 4. In addition, it was confirmed that there was a surface coating region where voids existed. The thickness of the surface coating region was 15 ⁇ .
- An ink receiving layer having the same coating amount as in Example 1 was formed in the same manner as in Example 1 using the same material as in Example 1. In the same manner as in Example 1, the surface of the ink receiving layer was smoothed.
- the recording medium of the present example obtained above was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
- Example 2 Using the same beating raw materials ( ⁇ ) and ( ⁇ ) as in Example 1, making the same basis weight as in Example 1 using the same paper machine as in Example 1, and applying the same on-machine coating as in Example 1 Alumina hydrate was applied at a coating amount of 5 g / m 2 by the same on-machine coating method as in Example 1 using the working fluid. A smoothing treatment was performed in the same manner as in Example 1 to obtain a support. Observation of the obtained support with an electron microscope on the portion coated with alumina hydrate showed that at least the surface of the fibrous substance was covered with alumina hydrate as shown in Fig. 4. In addition, it was confirmed that there was a surface coating area where voids existed. The thickness of the surface coating area was 40 / xm.
- Example 9 An ink receiving layer having the same coating amount as in Example 1 was formed using the same material as in Example 1 and in the same manner as in Example 1. The surface of the ink receiving layer was smoothed in the same manner as in Example 1. The recording medium of the present example obtained above was evaluated in the same manner as in Example 1, and the results are shown in Table 1. ' Comparative Example 9>
- a recording medium was prepared according to Comparative Example 2 of JP-A-2001-246840. Using the following materials, papermaking was performed in the same apparatus as in Example 1 so as to have the same basis weight as in Example.
- Inorganic pigment [alumina hydrate 15% solution] 115 parts by mass ⁇ Liquid scavenger [polyoxyethylene polypropylene condensate] 10 parts by mass 125 parts by mass
- a recording medium was prepared according to Example 1 of JP-A-2002-21121. Using the same beating materials (A) and (B) as in Example 1, papermaking was performed using the same paper machine as in Example 1 so as to have the same basis weight as in Example 1. Instead of the on-machine coating liquid of Example 1, the coating liquid having the following composition was used, and the same method as in Example 1 was applied. Coating was performed.
- the recording medium of Comparative Example 10 was obtained by performing a smoothing treatment in the same manner as in Comparative Example 9. No ink receiving layer was formed.
- the obtained recording medium of this comparative example was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
Landscapes
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
- Ink Jet (AREA)
Abstract
Description
Claims
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US11/281,473 US7815985B2 (en) | 2004-06-01 | 2005-11-18 | Recording medium, production process of the recording medium and image forming process using the recording medium |
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JP4898433B2 (ja) | 2004-06-01 | 2012-03-14 | キヤノン株式会社 | 被記録媒体、該被記録媒体の製造方法、及び該被記録媒体を用いた画像形成方法 |
US7815984B2 (en) * | 2005-07-12 | 2010-10-19 | Canon Kabushiki Kaisha | Recording medium and image forming method using the same |
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Also Published As
Publication number | Publication date |
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US7815985B2 (en) | 2010-10-19 |
JP4898433B2 (ja) | 2012-03-14 |
US20060078697A1 (en) | 2006-04-13 |
JPWO2005118304A1 (ja) | 2008-04-03 |
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