JP2001310546A - Printer, sheet package body and ink-jet record sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink-jet record sheet and a package body of a sheet to use for a printer, for which an occurrence of blur and transcription of an opposite side are prevented, while blocking is prevented and transport performance is improved and occurrence of a scratch is prevented. SOLUTION: The supply mechanism for a function to be different from the first sheet and to supply the second sheet and the printer that has a sheet carrier of piling up the first sheet and the second sheet alternately to take. The sheet package that a function is different from the first sheet which is an ink-jet record sheet, and the first-sheet and the second sheet is being piled up alternately and being wrapped and on the opposition side of the ink receptive layer, the ink-jet record sheet is set so that a solvent absorption sheet may exfoliate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer, a sheet package used for the printer, and an ink jet recording sheet. More specifically, the present invention relates to a printer in which stain due to show-through is prevented, a sheet package used in the printer, and an ink jet recording sheet in which stain due to show-through is prevented.

[0002]

2. Description of the Related Art In recent years, an overhead projector (OHP) has been used for presentation. OH
As the image original used for P, an image original formed on a transparent sheet such as plastic is used. Various printers are used to form an image original on a transparent sheet of plastic or the like. However, since inkjet recording uses an aqueous ink, it is highly safe, and a color image can be obtained at low cost. An ink jet printer has been widely used for creating a document. As the image receiving sheet used for such ink jet recording, there are a swelling type and a void type, but an ink jet recording sheet using a plastic or the like that does not absorb water as a support is a void type image receiving sheet. However, since the solvent contained in the ink-jet ink does not evaporate and stays for a long time, there is a disadvantage that the boundary of the image is easily blurred during storage. In addition, blocking occurs between adjacent sheets, and the transportability also deteriorates. Also, as printers become faster, ink drying can no longer catch up,
Next, when the printed sheets overlap, the ink of the printed sheet adheres to the back side, and show-through occurs. In particular, high-density show-through occurs in a high-density and high-liquid-volume portion, and when show-through with OHP, the show-through is projected, greatly deteriorating image quality.

[0003]

Accordingly, the first aspect of the present invention is as follows.
An object of the present invention is to provide a printer and a sheet package used for the printer, in which generation of bleeding and show-through is prevented, blocking is prevented, transportability is improved, and scratches are prevented from occurring. A second object of the present invention is to provide an ink jet recording sheet in which occurrence of bleeding and show-through is prevented, blocking is prevented, transportability is improved, and occurrence of scratches is prevented.

[0004]

The object of the present invention is to provide: (1) a supply mechanism for supplying a first sheet and a supply mechanism for supplying a second sheet having a function different from that of the first sheet; A printer comprising a sheet receiver for receiving a first sheet and a second sheet alternately. (2) The printer according to the above (1), wherein the first sheet is an ink jet recording sheet. (3) At least the first ink-jet recording sheet
And a second sheet having a function different from that of the first sheet is alternately stacked and packaged. (4) The sheet package according to (3), wherein the first sheet is an ink jet recording sheet made of a transparent plastic film having an ink receiving layer. (5) An ink jet recording sheet having a support and an ink receiving layer, wherein a solvent absorbing sheet is provided on the opposite side of the ink receiving layer in a releasable manner. (6) The ink jet recording sheet according to the above (5), wherein the solvent absorbing sheet is paper having a solvent absorbing property. (7) The ink jet recording sheet according to the above (5), wherein the solvent absorbing sheet is a solvent absorbing resin layer. Achieved by

Hereinafter, the present invention will be described in detail. First, a supply mechanism for supplying a first sheet and a supply mechanism for supplying a second sheet having a function different from that of the first sheet, and a sheet receiver for receiving the first and second sheets alternately in an overlapping manner (Hereinafter, also referred to as the printer of the present invention) will be described.

Hereinafter, a printer according to the present invention will be described with reference to the drawings. FIG. 1 shows an example of the printer of the present invention. In FIG. 1, reference numeral 1 denotes a first sheet, 2 denotes a first cassette, 3 denotes a first sheet feed tray, 4 denotes a second sheet, and 5 denotes a first sheet. Second
Cassette, 6 a second paper feed tray, 7 a first supply mechanism, 8
Denotes a guide, 9 denotes a second supply mechanism, 10 denotes a guide, 11 denotes a guide, 12 denotes an inkjet head, 13 denotes a discharge belt, and 14 denotes a print receiver. The first of the first cassette 2
The first sheets 1 stacked on the paper feed tray 3 are the first sheets 1
An image is formed by the inkjet head 12 through the guide 8 and the guide 11 by the supply mechanism 7, and the discharge belt 1 is formed.
3 is sent to the print receiver 14. The second sheets 4 stacked on the second paper feed tray 6 of the second cassette 5 pass through the guides 10 and 11 by the second supply mechanism 9 and pass through the inkjet head 1.
After that, the paper is sent to the print receiver 14 by the discharge belt 13.

In the printer, the first supply mechanism 7 and the second supply mechanism 9 are alternately operated by a mechanism not shown, and the first sheet 1 is fed out by the first supply mechanism 7. Thereafter, the second supply mechanism 9 is operated, and the second sheet 4 is sent out. While the first sheet 1 is being fed, an image is printed by the inkjet head 12 and sent to the print receiver 14, and then the sent second sheet 4 is printed on the first sheet 1 without being printed. Layered on. As described above, the alternate feeding of the first sheet 1 and the second sheet 4 is sequentially repeated. The mechanism for alternately operating the first supply mechanism 7 and the second supply mechanism 9 includes a known mechanism, for example, a sequence control mechanism.

When ink jet recording is performed by an ink jet printer, the ink jet recording sheet is
If the sheet has poor absorption of the ink solvent, such as an ink jet recording sheet for HP, the ink remaining on the surface of the previously printed sheet without being sufficiently absorbed is transferred to the back of the next printed sheet. The image quality may be impaired. When such a problem occurs, the above problem can be solved by using the printer of the present invention, for example, using an ink jet recording sheet as the first sheet 1 and a slip sheet as the second sheet 4. .

In the above, it is preferable to use a sheet having solvent absorbency as the slip sheet. By using a sheet having a solvent-absorbing property, ink remaining on the printed sheet surface without being sufficiently absorbed is quickly eliminated, and show-through caused by the remaining ink can be effectively eliminated.

Ink jet recording sheets include plain paper,
Although there are various media such as glossy paper, the effect of the present invention can be effectively used when using glossy paper that absorbs a small amount of ink solvent. Furthermore, the effect of the present invention can be effectively used when the support is a transparent film with little solvent absorption. The printer of the present invention can be used not only when performing the above-described ink-jet recording, but also when printing by a printing method in which an image formed by printing shows off. The glossy paper is provided with an ink receiving layer for absorbing ink on a support, and the image receiving layer includes a swelling type ink receiving layer and a void type ink receiving layer. An ink jet recording sheet having a swellable ink receiving layer has a support on which a resin layer capable of absorbing a solvent of the ink is provided. Also,
An ink jet recording sheet having a gap type ink receiving layer is provided with a resin layer having a gap capable of absorbing a solvent of the ink on a support. In an ink jet recording sheet having a void type ink receiving layer, the ink receiving layer is formed of fine particles and a hydrophilic binder.

The fine particles used include organic fine particles and inorganic fine particles. In particular, inorganic fine particles are preferably used, and examples thereof include light calcium carbonate, heavy calcium carbonate, magnesium carbonate,
Kaolin, clay, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc hydroxide, zinc sulfide, zinc carbonate, hydrotalcite, aluminum silicate, diatomaceous earth, calcium silicate, magnesium silicate,
Synthetic amorphous silica, colloidal silica, alumina, colloidal alumina, pseudoboehmite, aluminum hydroxide,
Examples thereof include white inorganic pigments such as lithopone, zeolite, and magnesium hydroxide. As the inorganic fine particles, both those having an anionic surface and those having a cationic surface can be used.

Examples of the hydrophilic binder used in the ink receiving layer include polyvinyl alcohol, gelatin, polyethylene oxide, polyvinyl pyrrolidone, polyacrylic acid, polyacrylamide, polyurethane, dextran, dextrin, carrageenan (λ, ι, etc.), agar. , Pullulan, water-soluble polyvinyl butyral, hydroxyethyl cellulose, carboxymethyl cellulose and the like. Two or more of these hydrophilic binders can be used in combination. A preferably used hydrophilic binder is polyvinyl alcohol. These polyvinyl alcohols include not only ordinary polyvinyl alcohol obtained by hydrolyzing polyvinyl acetate, but also modified polyvinyl alcohol such as polyvinyl alcohol having a cation-modified terminal or anion-modified polyvinyl alcohol having an anionic group. .

The ratio between the inorganic fine particles and the hydrophilic binder used in the ink receiving layer is approximately 2: 1 to 1 by mass.
0: 1, particularly preferably 3: 1 to 8: 1. By setting the ratio of the inorganic fine particles to the hydrophilic binder to a high value as described above, the ink receiving layer can achieve a high porosity. Preferred porosity is 40-80%,
In particular, 50 to 70% is preferable. The porosity is obtained according to the following equation. Porosity = 100 × (total dried film thickness−coated solid film thickness) / total dried film thickness Here, the coated solid film thickness refers to the film thickness when there are no voids. It can be obtained by calculation from the mass per unit volume and the mass of the film per unit area.

As the support of the ink jet recording sheet, a paper support, a plastic support, a composite support, etc., which are conventionally known as a support of the ink jet recording sheet, can be appropriately used. It is preferable to use a hydrophobic support in which ink does not penetrate into the support in order to obtain the ink.

When the ink jet recording sheet is an OHP ink jet recording sheet, the support may be
A transparent support is used. The transparent support may be colored. As the transparent support, for example, a film made of a material such as a polyester resin, a diacetate resin, a triacetate resin, an acrylic resin, a polycarbonate resin, a polyvinyl chloride resin, cellophane, and celluloid can be used. When an ink jet recording sheet is used for OHP, the support preferably has heat resistance, and a polyethylene terephthalate film is preferable. The thickness of the support is preferably from 10 to 200 μm.

A backing layer can be provided on the ink jet recording sheet. In providing the ink receiving layer and the backing layer, it is preferable to provide a known undercoat layer in order to increase the adhesion between the ink receiving layer and the backing layer and the support. In order to increase the adhesive strength between the layers, it is preferable to perform a treatment such as a corona discharge treatment.

[0017] Ink jet inks are usually
A water-based ink is used. The aqueous ink basically consists of a colorant and an aqueous liquid medium, to which other additives are added. As the colorant, a water-soluble dye and a water-dispersible dye such as a direct dye, an acid dye, a basic dye, a reactive dye, and a food colorant can be used. As a liquid medium in the aqueous ink, water or a solvent soluble in water and water, for example, alcohols such as methyl alcohol, isopropyl alcohol, n-butyl alcohol, tert-butyl alcohol, and isobutyl alcohol, dimethylformamide, and dimethylacetamide Amides,
Ketones or ketone alcohols such as acetone and diacetone alcohol, ethers such as tetrahydrofuran and dioxane, polyalkylene glycols such as polyethylene glycol and polypropylene glycol, ethylene glycol, propylene glycol, butylene glycol, triethylene glycol, 1,2,2 6-hexanetriol, thiodiglycol, hexylene glycol,
Polyhydric alcohols such as diethylene glycol, glycerin and triethanolamine, ethylene glycol methyl ether, diethylene glycol methyl (or ethyl)
Examples of the solvent include a mixed solvent of a polyhydric alcohol such as ether and triethylene glycol monobutyl ether with a lower alkyl ether.

[0018] Among these many water-soluble organic solvents,
Preferred are polyhydric alcohols such as diethylene glycol, triethanolamine and glycerin, and lower alkyl ethers of polyhydric alcohols such as triethylene glycol monobutyl ether. As other additives of the aqueous ink, for example, a pH adjuster, a metal sequestering agent, a fungicide, a viscosity adjuster, a surface tension adjuster, a lubricant, a surfactant, a rust inhibitor and the like can be mentioned. The aqueous ink liquid is usually 25 to 20 ° C. in order to improve the wettability on the recording paper.
Those having a surface tension of 60 mN / m, preferably 30 to 50 mN / m are preferred.

The ink jet head used in the ink jet recording method of the present invention may be of an on-demand type or a continuous type. In addition, as a discharge method, an electro-mechanical conversion method (for example, a single cavity type, a double cavity type, a bender type, a piston type, a shared mode type, a shared wall type, etc.), and an electro-thermal conversion method (for example, thermal Inkjet type,
Specific examples include a bubble jet (registered trademark) type, an electrostatic suction type (eg, an electric field control type, a slit jet type, etc.), and a discharge type (eg, a spark jet type, etc.). Either ejection method may be used.

In the above description, the solvent-absorbing sheet used as the slip sheet is not particularly limited as long as it is a solvent-absorbing sheet. Examples of the sheet include a solvent-absorbing sheet and a support. A sheet in which a solvent-absorbing resin is applied to form a solvent-absorbing layer can be used. As a paper having solvent absorbency, the size degree is 1
It is preferably 0 or less, more preferably 5 or less. Further, it is preferable that the cellulose fibers are exposed on the surface of the paper. Specific examples of the solvent-absorbing paper include filter paper, woodfree paper, and copy paper. Considering the transportability of the printer, the basis weight is 50 to 150 g.
/ M ² is preferred.

The support in the sheet in which the solvent-absorbing resin is coated on the support is not particularly limited, but for example, paper, polypropylene and polyethylene terephthalate can be preferably used. The solvent-absorptive resin varies depending on the ink-jet ink used, but when the ink-jet ink is an aqueous ink, a water-absorbent resin can be used. As the water-absorbing resin, resins such as gelatin, casein, starch, carboxymethylcellulose, hydroxyethylcellulose, polyethyleneimine, polyvinylpyrrolidone, polyvinylacetal, polyvinylalcohol, ethylene-vinylacetate copolymer, and polyester can be suitably used.

The solvent absorbing layer preferably contains a conductive polymer for absorbing and fixing the organic solvent in the aqueous ink solvent. In this case, the ionicity of the conductive polymer may be cationic or anionic, and is not particularly limited. Examples of the cationic conductive polymer include a quaternary ammonium salt type styrene polymer, a quaternary ammonium salt type aminoalkyl methacrylate copolymer, and a quaternary ammonium salt type diallylamine copolymer. Examples of the anionic conductive polymer include a sulfonate-type styrene copolymer. These conductive polymers are preferably contained in an amount of 1 to 50%, more preferably 2 to 30%, of the water-absorbing resin by solid content. Further, an inorganic and / or organic filler may be added to the solvent absorbing layer for the purpose of preventing blocking. The thickness of the solvent absorbing layer is 1 to 25 μm
And more preferably 2 to 10 μm. If the thickness is less than 1 μm, sufficient solvent absorbency cannot be obtained.

The disadvantages caused by the ink remaining on the printed sheet surface without being sufficiently absorbed can be effectively eliminated by using the above-described printer of the present invention. The above drawbacks can also be eliminated by alternately stacking paper, sequentially feeding the paper from the front side, printing on an ink jet recording sheet, and overlaying the printed ink jet recording sheet with a slip sheet. The above method can be easily performed by using a package in which the ink jet recording sheets and the slip sheets are alternately laminated and packaged. In addition, the elimination of the above-mentioned drawbacks is due to the fact that, on the opposite side of the ink receiving layer, an ink jet recording sheet provided with an ink receiving layer on a support on which a solvent absorbing sheet is releasably provided (hereinafter also referred to as the ink jet recording sheet of the present invention) ).

The support and the ink receiving layer in the ink jet recording sheet of the present invention include the support and the ink receiving layer in the ink jet recording sheet described above. The solvent-absorbing sheet releasably provided on the opposite side of the ink-receiving layer is not particularly limited as long as it is a sheet capable of providing the surface on the opposite side of the ink-receiving layer with a solvent-absorbing property. For example, there may be mentioned the above-mentioned paper having solvent absorbency and a sheet in which a solvent-absorbent resin is applied to a support to form a solvent-absorbing layer. Further, a sheet formed of a solvent-absorbing resin can be used as long as the sheet has a strength that does not break when peeled.

The solvent absorbing sheet can be provided on a support in a releasable manner by using a release layer. The release layer may be provided on either the support or the solvent-absorbing sheet.However, when a pressure-sensitive adhesive is used as an adhesive, a release layer is provided on the solvent-absorbing sheet, and the adhesive is applied to the support when peeled off. Is left and it becomes difficult to handle with an ink jet recording sheet. Therefore, a release layer is preferably provided on a support, except when an adhesive layer is used by attaching another sheet or the like. The release layer can be formed by applying and drying a coating solution containing a binder resin and a release agent. As the binder resin, poly (meth) acrylate, polyvinyl acetoacetal, polyvinyl acetobutal, polyvinyl chloride, polyester and the like can be used. As the release agent, a silicone resin or a fluorine resin can be used. Examples of the adhesive include a natural rubber-based adhesive, a synthetic rubber-based adhesive, an acrylic-based adhesive (such as 2-ethylhexyl acrylate and butyl acrylate), a silicone-based adhesive, and an ultraviolet-curable adhesive. .

The bonding between the support and the solvent-absorbent sheet is performed by applying an adhesive layer on the release layer, and passing the support and the solvent-absorbent sheet together between pressure rolls. Can be.

[0027]

EXAMPLES Hereinafter, the present invention will be described specifically with reference to examples, but the present invention is not limited to these examples.

—Preparation of Recording Sheet 1— << Preparation of Silica Dispersion-1 >> 125 kg of fumed silica (A300 manufactured by Nippon Aerosil Co., Ltd.) having an average primary particle diameter of about 0.007 μm was added to nitric acid. PH = 2.
After suction-dispersing at room temperature into 620 liters of pure water adjusted to 5 using a jet stream inductor mixer TDS manufactured by Mitamura Riken Kogyo Co., Ltd., the total volume was made up to 694 liters with pure water, and a silica dispersion was prepared. -1 was prepared. When the obtained dispersion was diluted and photographed with an electron microscope, it was confirmed that most of the particles had a size of 0.01 μm or less and were dispersed to primary particles.

<< Preparation of Silica Dispersion-2 >> 25-30 ° C.
In a temperature range of 1.4, the cationic polymer (P-13) 1.4
69.4 liters of silica dispersion-1 are added with stirring to 20 liters of a solution (pH = 2.3) containing 1 kg and 4.2 liters of ethanol over 20 minutes, then 260 g of boric acid and borax 7.0 liter of an aqueous solution (pH: 7.3) containing 230 g was added over about 10 minutes, and 1 g of an antifoaming agent (manufactured by San Nopco; SN Deformer 381) was further added. The obtained mixture was subjected to 24.5 MPa using a high-pressure homogenizer manufactured by Sanwa Industry Co., Ltd.
The mixture was dispersed twice under the pressure described above, and the whole amount was made up to 97 liters with pure water to prepare an almost clear silica dispersion liquid-2. The pH of the resulting dispersion was about 4.2.

[0030]

Embedded image

<< Preparation of Matting Agent Dispersion-1 >> A methacrylic acid ester-based matting agent (MX-1500H) (manufactured by Soken Kagaku Co., Ltd.) was charged with 156 g of polyvinyl alcohol (PVA).
235 Average polymerization degree: 3500) 3 g of pure water (manufactured by Kuraray Industries Co., Ltd.) was added to 7 liters of pure water, and dispersed using a high-speed homogenizer for 30 minutes to finish the whole amount to 7.8 liters and disperse the matting agent. Liquid-1 was prepared. The pH of this dispersion was about 5.2.

<< Preparation of Coating Solution >> Coating solutions for the first, second and third layers were prepared according to the following procedure. First layer coating liquid: 600 ml of silica dispersion liquid-2
While stirring at 0 ° C., the following additives were sequentially mixed, and the total amount was adjusted to 1000 ml with pure water. (1) 7% aqueous solution of polyvinyl alcohol (PVA235 average polymerization degree: 3500) (manufactured by Kuraray Industries Co., Ltd.): 194.6 ml (2) Latex emulsion / AE-803 (manufactured by Daiichi Kogyo Co., Ltd.): 18 ml Had a pH of about 4.4. Second layer coating liquid: 650 ml of silica dispersion liquid-2
While stirring at 0 ° C., the following additives were sequentially mixed, and the total amount was adjusted to 1000 ml with pure water. (1) 7% aqueous solution of polyvinyl alcohol (PVA235 average polymerization degree: 3500) (manufactured by Kuraray Industries, Ltd.): 201.6 ml (2) 5% aqueous solution of anti-fading agent-1: 20 ml The pH of this coating solution is about 4 .4. (Preparation of 5% aqueous solution of anti-fading agent-1) 90 ml containing 5 g of N, N-disulfoethylhydroxylamine disodium salt and 3 g of cationic polymer (P-13)
In water to make a total volume of 100 ml. Third layer coating liquid: 650 ml of silica dispersion liquid 2
While stirring at 0 ° C., the following additives were sequentially mixed, and the total amount was adjusted to 1000 ml with pure water. (1) 7% aqueous solution of polyvinyl alcohol (PVA235 average polymerization degree: 3500) (manufactured by Kuraray Industries, Ltd.): 201.6 ml (2) Silicon dispersion (BY-22-839) (Toray
Dow Corning Silicone Co., Ltd.): 15 ml (3) 50% aqueous solution of saponin: 4 ml (4) Matting agent dispersion liquid: 1:10 ml The pH of this coating solution was about 4.5.

The coating solution obtained as described above was filtered through the following filter. Coating solution for first layer and coating solution for second layer: TCP10 manufactured by Toyo Roshi Kaisha Co., Ltd., two stages. Coating solution for third layer: 2 with TCP30 manufactured by Toyo Roshi Kaisha, Ltd.
Dan. —Preparation of Recording Sheet 1— A latex resin dispersion was applied to a transparent biaxially stretched polyethylene terephthalate film having a thickness of 100 μm to provide an undercoat layer. 3 at 40 ° C. on the support
Using a layered slide hopper, the coating liquid was applied to a first layer (wet film thickness of 40 μm), a second layer (wet film thickness of 80 μm),
Coating was performed by simultaneous coating in the order of the third layer (wet film thickness: 40 μm) to form an ink receiving layer. Immediately after coating, after cooling in a cooling zone maintained at 0 ° C. for 20 seconds,
Dry for 60 seconds in a wind of 25 ° C. (15% relative humidity), 45
Drying for 60 seconds with a wind of 25 ° C. (25% relative humidity) and drying for 60 seconds with a wind of 50 ° C. (25% relative humidity) are performed sequentially.
The sample was conditioned in an atmosphere of 0 to 25 ° C. and a relative temperature of 40 to 60% for 2 minutes, and the sample was wound up to form a recording sheet 1.

Comparative Example 1 The recording sheet 1 was cut into A-4 size, and 10 sheets were stacked.
This was set on an ink jet printer (PM770C: manufactured by Seiko Epson Corporation) with 10 sheets stacked, and an image was printed. Since two of the ten sheets were conveyed overlapping, there was one sheet on which no image was recorded. This was later printed by hand. It was left for one day with this layered. After the standing, when projected by an OHP projector, it was observed that there was a scratch, and stains due to show-through were also observed. Recording sheet 1 on which this image is recorded
Is placed in an environment of 80 ° C. and 40% humidity for one week,
When projected by the projector, further blurring of the image was observed, and black and white lines at 1 mm intervals could not be resolved.

Example 1-Preparation of slip sheets 1 to 5-Hardwood bleached kraft pulp was used as a raw material pulp, and had a basis weight of 80 g / m ² , a Stöckigt sizing degree of 0 second and 2 seconds, and
Papers 1 to 5 were prepared for 4, 9 and 15 seconds. Slip sheet 1: 0 second Slip sheet 2: 2 seconds Slip sheet 4: 4 seconds Slip sheet 4: 9 seconds Slip sheet 5: 15 seconds

The A-size paper is cut on the slip sheet 1 cut to the A-4 size.
Ten sets were formed by stacking the recording sheets 1 cut into four sizes, and these ten sets were stacked and set on an ink jet printer (PM770C manufactured by Seiko Epson). Next, when the recording sheet 1 is transported, the image data is sent, and when the slip sheet 1 is transported, the image data is not sent.
And the slip sheet 1 were alternately conveyed and printed. In the discharge tray, 10 sets in which the printed recording sheet 1 and the unprinted interleaf 1 were overlapped were obtained. When left as it is for one day and projected by OHP projector,
Scratches were observed, but stains due to show-through were not observed. Recording sheet 1 on which this image is recorded
Is placed in an environment of 80 ° C. and 40% humidity for one week,
When projected by the projector, no bleeding of the image was observed.

An image was formed on the recording sheet 1 in the same manner as described above using the slip sheets 2 to 5 instead of the slip sheet 1. When the slip sheets 2 and 3 were used, no image bleeding was observed as in the case where the slip sheet 1 was used. When the slip sheet 4 was used, slight bleeding was observed. Further, black and white lines alternately arranged with a thickness of 0.3 mm could not be resolved. When the slip sheet 5 was used, black and white lines alternately arranged with a thickness of 0.5 mm could not be resolved.

EXAMPLE 2 Ten recording sheets 1 cut to A-4 size were stacked on the first paper feed tray 3 of the printer shown in FIG. 1, and cut to A-4 size on the second paper feed tray 6. Ten slip sheets 2 were laminated. Next, the first supply mechanism 7 was operated to convey the recording sheet 1 from the first paper feed tray 3, an image was printed by the inkjet head 12, and was conveyed to the print receiver 14 by the discharge belt 13. Next, the second supply mechanism 9 is operated to transport the slip sheet 2 from the second paper feed tray 6, to the print receiver 14 by the discharge belt 13, and to print the recording sheet 1.
Layered on top. The image was not printed while the slip sheet 2 was being conveyed. This operation was repeated 10 times. The print receiver 14 was obtained by overlapping 10 sets each including the printed recording sheet 1 and the unprinted interleaf 2. It was left for one day with this layered. After standing, OH
When projected with a P projector, it was observed that there were scratches, but no stain due to show-through was observed. The recording sheet 1 on which this image was recorded was placed at 80 ° C. and a humidity of 40
% For one week and projected with an OHP projector, a clear image was observed without blurring of the image.

Example 3 A silicone release agent (KS-770, manufactured by Shin-Etsu Chemical Co., Ltd.) was applied on the back surface (the surface opposite to the ink receiving layer) of the recording paper 1 so that the dry weight was 0.9 g / m ^2. Was applied with a bar coater and dried to form a release layer. On this release layer surface, a two-liquid cross-linkable acrylic pressure-sensitive adhesive (Cybinol-X-388-4)
29E, manufactured by Seiden Chemical Co., Ltd.) at a dry weight of 25 g /
It was applied and dried with a roll coater so as to obtain m ^2, and an adhesive layer was provided. Next, the slip sheet 2 was placed on the upper surface of the pressure-sensitive adhesive layer, and was adhered with a press roll to prepare a removable OHP image receiving sheet 2. The re-peelable OHP image receiving sheet 2 is A-
It was cut into 4 sizes and 10 sheets were stacked. This was set on an ink jet printer (PM770C: manufactured by Seiko Epson) with 10 sheets stacked, and an image was printed. The last sheet was conveyed and discharged without printing. The first nine sheets were all conveyed and printed one by one.

This was left standing for one day while being piled up. After leaving
When the slip sheet 2 was peeled off and projected by an OHP projector, a clear image without bleeding or scratches was observed. In addition, no stain due to show-through was observed. After leaving the image recording medium in an environment of 80 ° C. and a humidity of 40% for one week, the slip sheet 2 was peeled off and projected by an OHP projector. As a result, a clear image without bleeding was observed. Removable OHP image-receiving sheets 1, 3, 4 and 5 were prepared in the same manner as described above except that the slip sheets 2 were replaced with the slip sheets 1, 3, 4 and 5. When the slip sheets 1 and 3 were used, no bleeding of the image was observed as in the case where the slip sheet 2 was used. When the slip sheet 4 was used, slight bleeding was observed. Also, 0.3
Black and white lines alternately arranged with a thickness of mm could not be resolved. When the slip sheet 5 was used, black and white lines alternately arranged with a thickness of 0.5 mm could not be resolved.

[0041]

According to the present invention, the printer can obtain a print without bleeding or show-through, can prevent blocking, improve transportability, and can prevent abrasion. Further, by using the sheet package and the inkjet recording sheet of the present invention,
A print without bleeding or show-through can be obtained, blocking can be prevented, transportability is improved, and scratches can be prevented.

[0042]

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating an example of a printer according to the invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st sheet 2 1st cassette 3 1st paper feed tray 4 2nd sheet 5 2nd cassette 6 2nd paper feed tray 7 1st supply mechanism 8 guide 9 2nd supply mechanism 10 guide 11 guide 12 inkjet head 13 Discharge belt 14 Print receiver

Claims (7)

[Claims] A supply mechanism for supplying a first sheet and a first sheet;
A printer for supplying a second sheet having a function different from that of the first sheet and a sheet receiver for receiving the first sheet and the second sheet alternately. 2. The printer according to claim 1, wherein the first sheet is an ink jet recording sheet. 3. A sheet package wherein at least a first sheet as an ink jet recording sheet and a second sheet having a function different from that of the first sheet are alternately stacked and packaged. 4. The sheet package according to claim 3, wherein the first sheet is an ink jet recording sheet made of a transparent plastic film having an ink receiving layer. 5. An ink-jet recording sheet having a support and an ink-receiving layer, wherein a solvent-absorbing sheet is releasably provided on the side opposite to the ink-receiving layer. 6. The ink jet recording sheet according to claim 5, wherein the solvent absorbing sheet is paper having a solvent absorbing property. 7. The ink jet recording sheet according to claim 5, wherein the solvent absorbing sheet is a solvent absorbing resin layer.