JP2003291486A - Printing sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printing sheet, which is excellent in water resistance, in printing contents by which no feathering develops and which is excellent in printability with an inkjet printer. <P>SOLUTION: This printing sheet 1 is formed by providing a water resisting inkjet ink accepting layer 3 on at least the printing side or one side of a water resisting sheet base material 2 made of water-resistant pure paper or synthetic paper. By printing information with an inkjet printer on the inkjet ink accepting layer 3 of the printing side, neither breakage of the printing sheet 1 nor difficulty to read printing contents due to feathering develops. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing sheet which is printed by a printer, and more particularly to a printing sheet which is excellent in water resistance and suitable for printing by an ink jet printer.

[0002]

2. Description of the Related Art Conventionally, various types of printing sheets have been known, but a common drawback of these conventional printing sheets is inferior water resistance. Then, in order to improve the water resistance, it has been attempted to subject the sheet to water resistance processing.

[0003]

However, the conventional attempts to carry out water-resistant processing have a disadvantage that the printability of the print sheet is inferior. It is an object of the present invention to eliminate such inconveniences and to provide a printing sheet which is excellent in water resistance and is particularly excellent in printability by an inkjet printer.

[0004]

In order to achieve this object, a printing sheet according to the present invention has a basic structure in which a printing surface which is at least one surface of a sheet base material having water resistance has an ink jet ink receiving material having water resistance. It is provided with layers.

As another preferable structure, an ink jet ink receiving layer having water resistance is provided on at least one printing surface of a water resistant sheet base material, and the ink jet ink receiving layer is provided with variable information by an ink jet printer. Is printed.

Further, the print sheet of the present invention has the most preferable ink jet ink receiving layer for a vehicle in which the ink jet ink receiving layer mainly contains a glycol solvent having a boiling point of 100 ° C. or more as a main component. An inkjet ink containing a cationic resin and / or porous fine particles is used as a receptive glycol-based ink, or a cationic resin and / or a vehicle containing an acrylic photocurable component as a main component is used.
Alternatively, an ink jet ink-receptive photocurable ink containing porous fine particles is preferable.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Here, FIGS. 1 to 3 show a preferred embodiment when the present invention is applied for receipt, and FIG. 1 is a schematic perspective view of a continuous printing sheet wound in a roll shape. 2 is shown in FIG.
3 is an enlarged sectional view taken along line AA of FIG. 3, FIG. 3 is a schematic plan view of a receipt formed by printing and cutting it into a predetermined length, and FIG. 4 is a preferred embodiment when the present invention is applied to an advertisement leaflet. It is a schematic plan view which shows a form.

First, a preferred embodiment of a receipt print sheet will be described with reference to FIGS. Figure 1
As shown in FIG. 2, the print sheet 1 is formed by winding a continuous paper in a roll shape, and a water-resistant inkjet ink receiving layer 3 is provided on the print surface of a sheet base material 2 made of water-resistant paper. . The print sheet 1 is initially in a blank state.

Since this embodiment is constructed as described above,
The continuous printing sheet 1 wound in a roll shape as shown in FIG. 1 is set in a cash register equipped with an ink jet printer (not shown) as in the prior art, and a predetermined value is input from an input key of the cash register. By inputting the data of, the receipt 4 “receipt”, receipt date information 5, product name information 6, product number information 7, amount information 8, receipt amount information 9, and issuer information 10 And are printed, cut under the printed portion of this issuer information 10,
A receipt 11 can be issued. Then, the printing is made clear by the action of the inkjet ink receiving layer 3. Each of the above information 5 to 9 is variable information.

The receipt 11 is stamped next to the issuer information 10 and handed to the customer, but the receipt may be printed. When issuing this receipt 11,
Especially in industries that frequently use water, such as restaurants,
Although the hand of the issuing operator is often wet, the sheet base material 2 of the print sheet 1 has water resistance and
Since the inkjet ink receiving layer 3 also has water resistance,
If the receipt 11 is damaged or the printed contents are blurred, the receipt amount information 9 and other information 4, 5, 6,
7, 8 and 10 are not difficult to read.

Next, a preferred embodiment when applied to an advertisement leaflet will be described with reference to FIG. The print sheet 21 of the present embodiment is, except that it is in a single piece state from the beginning,
Although not shown, it has the same structure as the print sheet 1 of the first embodiment described above, and is provided with a water-resistant inkjet ink receiving layer on the print surface of a sheet base material made of water-resistant paper. Is blank.

The print sheet 21 is set in a conventionally known ink jet printer (not shown) which works in conjunction with a computer, and by inputting predetermined data from a keyboard which is an input section of the computer,
The title 22 "Notice of XX Department Store Spring Fair", the holding period information 23, and the advertisement text information 24 are printed to form an advertisement leaflet 25.

This advertisement leaflet 25 has the receipt 1 mentioned above.
Since the sheet base material and the ink-jet ink receiving layer have water resistance as in the case of 1, the printed matter will be damaged or bleeded even if it is put in a mail box or the like in the rain.
2 and each information 23, 24 does not become difficult to read.

The present invention is not limited to the above-described embodiments, and for example, the ink jet ink receiving layer 3 may be provided on both sides of the print sheets 1 and 21.
Then, as the water resistant paper, it is possible to use high-quality paper or synthetic paper that has been subjected to water resistance processing.

The ink jet ink receiving layer in the print sheet of the present invention will be described in detail below. The inkjet ink-receiving layer of the present invention may be composed of, for example, a conventional inkjet ink-receptive coating obtained by dispersing a cation resin in a binder component. Problems may occur in the partial formation on the substrate, and the water resistance of the printed inkjet ink is not greatly improved. Therefore, in the present invention, it is possible to preferably form a partial inkjet ink-receiving layer, the ink-jet ink receiving layer has excellent receptivity to the inkjet ink-receiving layer, bleeding of a printed image hardly occurs, and the water resistance of the printed inkjet ink is high. Ink-jet ink-receptive glycol-based inks or photo-curable inks, which can further improve properties, are preferably used.

The ink composed of these special formulations will be described in detail below. First, the vehicle component of jet ink receptive glycol-based ink, the glycol-based solvent used in this ink is a medium boiling point solvent or a high boiling point solvent (having a boiling point of 100 ° C. or higher), and specifically, for example, glycol. (Glycerin, ethylene glycol, diethylene glycol, triethylene glycol,
Polyethylene glycol, propylene glycol, dipropylene glycol) and glycol derivatives (ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether) Acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate), and the like, and mixtures of two or more thereof.

Next, the vehicle component of the ink-jet ink-receptive photocurable ink, the acrylic photocurable component used in this ink is a known acrylic photopolymerizable monomer and / or acrylic photopolymerizable monomer. The oligomer can be arbitrarily selected and used. Examples of such a photopolymerizable monomer include unsaturated carboxylic acids such as acrylic acid and methacrylic acid or esters thereof, such as alkyl-, cycloalkyl-, halogenated alkyl-, alkoxyalkyl-, and hydroxyalkyl-,
Aminoalkyl-, tetrahydrofurfuryl-, allyl-, glycidyl-, benzyl-, phenoxy-acrylates and methacrylates, alkylene glycols, polyoxyalkylene glycol mono- or diacrylates and methacrylates, trimethylolpropane triacrylate and methacrylates, pentaerythritol. Acrylamide, methacrylamide or derivatives thereof such as tetraacrylate and methacrylate, for example, acrylamide and methacrylamide mono- or di-substituted with an alkyl group or a hydroxyalkyl group, diacetone acrylamide and methacrylamide, N, N'-alkylenebisacrylamide and Allyl compounds such as methacrylamide, allyl alcohol, allyl isocyanate, diallyl phenyl, etc. Rate, and the like can be mentioned triallyl isocyanurate.

For applications where curing shrinkage is an obstacle, for example, isobornyl acrylate or methacrylate, norbornyl acrylate or methacrylate, dicyclopentenoxyethyl acrylate or methacrylate, dicyclopentenoxypropyl acrylate or Acrylate or methacrylic acid ester of diethylene glycol dicyclopentenyl monoether such as methacrylate, polyoxyethylene or polypropylene glycol dicyclopentenyl monoether acrylic acid ester or methacrylic acid ester, such as dicyclopentenyl cinnamate, dicyclopentenoxy Ethyl cinnamate, dicyclopentenoxyethyl monofumarate or difumarate such as 3,9-bis (1,1
-Bismethyl-2-oxyethyl) -spiro [5,5]
Undecane, 3,9-bis (1,1-bismethyl-2-
Oxyethyl) -2,4,8,10-tetraoxaspiro [5,5] undecane, 3,9-bis (2-oxyethyl) -spiro [5,5] undecane, 3,9-bis (2-oxyethyl) Mono-, diacrylate or mono-, dimethacrylate such as -2,4,8,10-tetraoxaspiro [5,5] undecane, or mono-, ethylene oxide or propylene oxide addition polymer of these spiroglycols, Diacrylate, mono- or dimethacrylate, or methyl ether of the monoacrylate or methacrylate, 1-azabicyclo [2,2,2] -3-octenyl acrylate or methacrylate, bicyclo [2,2,1] -5 -Heptene-2,3-dicarboxyl monoallyl ester, such as dicyclopenta Enyl acrylate or methacrylate, it can be used a photopolymerizable monomer, such as dicyclopentadienyl oxyethyl acrylate or methacrylate, dihydrodicyclopentadienyl acrylate or methacrylate. These photopolymerizable monomers may be used alone or in combination of two or more.

As the acrylic photopolymerizable oligomer,
Acrylic acid ester of epoxy resin such as diglycidyl ether diacrylate of bisphenol A, reaction product of epoxy resin with acrylic acid and methyltetrahydrophthalic anhydride, reaction product of epoxy resin with 2-hydroxyethyl acrylate, glycidyl diacrylate Ring-opening copolymerization ester of acrylate and phthalic anhydride, ester of methacrylic acid dimer and polyol, polyester obtained from acrylic acid, phthalic anhydride and propylene oxide, reaction product of polyvinyl alcohol and N-methylolacrylamide An unsaturated polyester prepolymer such as a reaction product of polyethylene glycol, maleic anhydride and glycidyl methacrylate, or the like, after esterifying polyvinyl alcohol with succinic anhydride,
Such as polyvinyl alcohol prepolymers such as those with glycidyl methacrylate added, reaction products of methyl vinyl ether-maleic anhydride copolymer and 2-hydroxyethyl acrylate, or those further reacted with glycidyl methacrylate Polyacrylic acid or maleic acid copolymer-based prepolymers, etc., as well as urethane-based prepolymers having acryloyl groups or methacryloyl groups at both ends linked to polyoxyalkylene segments and / or saturated polyester segments via urethane bonds, etc. Can be mentioned. These acrylic photopolymerizable oligomers are
A weight average molecular weight of about 2000 to 30,000 is suitable.

The photopolymerization initiator may be a conventionally known one, for example, 1-hydroxy-cyclohexyl-phenyl-ketone, 2-hydroxy-2-methyl-1.
-Phenyl-propan-1-one, 1- [4- (2-hydroxyethoxy) -phenyl] -2-hydroxy-methyl-1-propan-1-one, 2-methyl-1- [4
-(Methylthio) phenyl] -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1
-(4-morpholinophenyl) -butanone-1-bis (2,6-dimethoxybenzoyl) -2,4,4-trimethyl-pentylphosphine oxide-bis (2,2
4,6-trimethylbenzoyl) -phenylphosphine oxide and the like can be mentioned. These photopolymerization initiators may be used alone or in combination of two or more. The content thereof is preferably selected in the range of 5 to 15 parts by mass per 100 parts by mass of the acrylic photocurable component.

As the cationic resin to be added to the vehicle component of each of the above inks, for example, in powder form, polyamine-based Sunfix 555, Sunfix 555C, and Sunfix 555 manufactured by Sanyo Chemical Industry Co., Ltd.
NK, Sunfix 555US, Rheox AS (special cation resin) manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Charol D
M-254P (methacrylic acid ester chloride quaternary salt polymer), Charol DM-283P (methacrylic acid ester chloride quaternary salt polymer), Nitto Boseki Co., Ltd.
PAA-HCI-3S (polyallylamine hydrochloride), PAA-HCI-10S (polyallylamine hydrochloride) manufactured by Nippon Shokubai Co., Ltd., and Epomin SP-012 (polyethylene) manufactured by Nippon Shokubai Co., Ltd. Imine), Epomin SP-110 (polyethyleneimine),
Epomin SP-200 (polyethyleneimine) and the like can be mentioned.

The mass ratio of the vehicle component to the cationic resin (vehicle: cationic resin) is preferably in the range of 1: 1 to 1: 0.1 for both inks. If the amount of the cationic resin exceeds this range, the printability may be deteriorated. Conversely, if the amount of the cationic resin is less than this range, the water resistance may be deteriorated, which is not preferable.

The above-mentioned cationic resin may be used alone, but porous fine particles may be used alone instead of the cationic resin, and the cationic resin and porous fine particles may be used in combination. Specific examples of the porous fine particles include, for example, silica fine particles and hydrophobic fine particles (Nipsil SS-10 manufactured by Nippon Silica Industry Co., Ltd.).
F, SS-15, SS-10A, SS-20, SS-3
0P, SS-30S, SS-40, SS-50, SS-
50A, SS-60, SS-70, SS-100, SS
-10F, SS-50F, SS-50B, SS-50
C, SS-72F, SS-170X, SS-178B, etc.) and hydrophilic ones (Tokuyama Fine Seal A, B, USF, E50, E70, T32, X12,
X30, X37, X37B, X40, X45, X60,
X70, X80, RX70, K41, F80, F80
B, P8, CMF, etc.), titanium dioxide (T805, Nippon Aerosil Co., Ltd.), fine alumina particles, natural zeolite, synthetic zeolite, calcium carbonate, activated clay,
Examples thereof include porous fine particles such as glass and shirasu balloon. These may be used alone or in combination of two or more.

The amount of the porous fine particles in both types of ink is preferably 5 to 60 parts by weight, and more preferably 10 to 50 parts by weight, based on 100 parts by weight of the vehicle component. If it is less than 5 parts by mass, stickiness may be suppressed or water resistance or bleeding of a printed image may not be improved, and if it exceeds 60 parts by mass, suitability for printing ink may be deteriorated.

[0025]

As is apparent from the above description,
According to the print sheet according to claim 1 or claim 2 of the present application, it is possible to clearly print with an inkjet printer, and even if the print sheet gets wet during handling, the print sheet is damaged or the print content is blurred. This has the effect of not becoming difficult to read. Furthermore, according to the printing sheet of claim 3 or claim 4 of the present application, it is possible to preferably form a partial inkjet ink-receiving layer, and the ink-jet ink receiving layer has excellent receptivity of the inkjet ink, and a printed image is obtained. Is less likely to occur and the water resistance of the printed inkjet ink can be further improved.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing a print sheet according to a first embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a schematic plan view of a receipt in which information is also printed.

FIG. 4 is a schematic plan view of an advertisement leaflet on which information according to the second embodiment is printed.

[Explanation of symbols]

1,21 printing sheet 2 sheet base materials 3 Inkjet ink receiving layer 11 receipt 25 advertising leaflets

Claims (4)

[Claims] 1. A printing sheet comprising a water-resistant sheet base material and at least one surface thereof provided with a water-resistant inkjet ink receiving layer. 2. A printing sheet comprising a water-resistant sheet base material provided on at least one surface thereof with a water-resistant inkjet ink receiving layer, and variable information is printed on the inkjet ink receiving layer with an inkjet printer. 3. The inkjet ink receiving layer is mainly composed of:
2. An inkjet ink-receptive glycol-based ink comprising a vehicle containing a glycol-based solvent having a boiling point of 100 ° C. or higher as a main component, and a cationic resin and / or porous fine particles mixed therein. The print sheet according to claim 2. 4. The inkjet ink-receiving layer is mainly composed of:
The ink-jet ink-receptive photo-curable ink comprising a vehicle containing an acrylic photo-curable component as a main component, and a cationic resin and / or porous fine particles mixed therein. Item 2
Printed sheet described.