JPH11277925A - Manufacture of printed matter, and printed matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent damages through abrasion in printing surface by coating an overprint varnish composition containing fluorocarbon resin of a specific volumic average particle diameter over at least one surface of paper after printing. SOLUTION: A printing paper printed with a predetermined printing ink at a printing portion 13 is delivered to an over print(OP) varnish coating portion 14, and an OP varnish composition is coated thereto. In the next place, the printing paper is forwarded to a hot air drying device 15 to be dried, followed by being cooled by a cooling portion 16, folded by a folding machine 17, and then ejected from a rotary machine. Herein, in order to protect the printing surface, an OP varnish composition applied contains fluorocarbon resin of a volumic average particle diameter of 1 or 10 μm. Such fluorocarbon resin is preferable to be polytetrafluoroethylene resin in particular. Also, fluorocarbon resin particles of the order of 10-400 wt.% are blended in the OP varnish composition on the basis of a solid portion of the whole OP varnish composition (except fluorocarbon resin particles). Besides, such an OP varnish composition can be coated by offset printing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing printed material, which prints a printed printing paper, and then folds and discharges the printed material.

[0002]

2. Description of the Related Art In general, when printing a printed material such as a poster using a web offset rotary press, printing is performed on a rolled print sheet, dried, folded, and discharged. . In this type of rotary offset press, printing paper is conveyed at high speed, and color printing is performed by a printing cylinder. The printed matter that has been printed is folded by the folding machine, and then discharged from the rotary press. When the printed matter is folded by a folding machine, the printed surfaces are often rubbed and the printing ink film is often damaged.

Heretofore, when producing a printed material by such offset rotary printing, no consideration has been given to damage to the ink film due to friction of the printing surface at the folding base.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a printed material capable of preventing the printed surface from being damaged by friction on the printed surface when the printed material is folded and discharged after printing on the wound printing paper. It is an object of the present invention to provide a production method and a printed matter produced in such a manner.

[0005]

According to the present invention, there is provided, in accordance with the present invention, a method for producing a printed product by printing on a rolled print sheet, comprising unwinding the print sheet, The printing ink is printed on at least one side, then the overprint varnish composition containing the fluororesin particles having a volume average particle diameter of 1 to 10 μm is coated on the printing surface, and dried. And a method for manufacturing a printed material, wherein the printed material is folded and discharged. Printed matter manufactured by the method for manufacturing a printed matter of the present invention also belongs to the scope of the present invention.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, an overprint (OP) varnish composition applied to protect a printing surface after a predetermined printing is performed on a printing paper with a printing ink and before being obtained and folded by a folding machine. Thing is overprint varnish,
It contains fluorine resin particles having a volume average particle diameter of 1 to 10 μm.

[0007] In the OP varnish composition of the present invention, the fluororesin acts to impart abrasion resistance, and also imparts water repellency and scratch resistance to the printed matter. The fluororesin is included in the OP varnish composition of the present invention in the form of particles. The fluororesin used in the present invention is preferably a resin which does not dissolve in the varnish solvent and can be uniformly dispersed as particles. Specifically, polytetrafluoroethylene resin (hereinafter may be abbreviated as “PTFE”), polychlorotrifluoroethylene resin, polyhexafluoropropylene resin, ethylene-fluoroethylene copolymer resin,
A tetrafluoroethylene-hexafluoropropylene copolymer resin, a polyperfluoroalkoxy resin, or the like can be used. Among them, PTFE is particularly preferred.

In the present invention, the particle size of the fluororesin particles is represented by a volume average particle size obtained by a laser diffraction method, a Coulter counter method or the like well known in the art. In the present invention, the fluororesin particles have a volume average particle size of 1 to 10 μm. Volume average particle size 1μm
If it is less than 0, fluororesin particles are contained in the OP varnish film.
When it does not protrude onto the P varnish film and cannot improve the friction resistance, on the other hand, when the volume average particle size exceeds 10 μm, the dispersibility of the fluororesin particles in the OP varnish decreases, and the fluidity also decreases. Without improvement, the tendency of the fluororesin particles to deposit on the printing plate or blanket increases. The volume average particle diameter of the fluororesin particles is preferably 2 to 5 μm. Furthermore, 45% by weight or more of the total fluororesin particles used in the OP varnish composition of the present invention have a volume average particle diameter of 2 to 4%.
More preferably, it has a μm.

The fluororesin particles are used in a proportion of 10 to 400% by weight based on the solid content of the entire OP varnish composition (excluding the fluororesin particles; the same applies in the present specification).
It is blended into a varnish composition. When the content of the fluororesin particles is less than 10% by weight based on the solid content, sufficient friction resistance cannot be obtained. Piling properties and leveling properties become insufficient. More preferably, the fluororesin particles are added to the OP varnish composition at a ratio of 20 to 120% by weight based on the solid content.

In the present invention, the above-mentioned solid content of the OP varnish composition may be adjusted to the room temperature (20%) contained in the OP varnish composition of the present invention.
C), and more specifically, it is composed of various resins and drying oil blended as a vehicle, excluding the solvent component.

The OP varnish composition of the present invention can be applied by an offset printing method, a gravure printing method, a silk screen method, or the like. The applied OP varnish composition forms a substantially colorless and transparent film after drying.

In the case of coating by the offset printing method, the OP varnish composition of the present invention, except for the fluororesin particles, comprises a resin 20 to 80 such as a rosin-modified phenol resin, a petroleum resin, an alkyd resin, or a dry oil-modified resin. 0% to 80% by weight of a drying oil such as linseed oil, tung oil and soybean oil, 0 to 80% by weight of a solvent such as normal paraffin, isoparaffin, aromatic hydrocarbon, naphthene, α-olefin or a mixture thereof; , And 1 to 5% by weight of additives such as a drying inhibitor (total of 100% by weight excluding fluororesin particles). More preferably, 0.3 to 4 parts by weight of a drying oil is blended with respect to 1 part by weight of the resin.

[0013] When applied by a gravure printing method, the OP varnish composition of the present invention comprises an acrylic resin, a vinyl chloride-vinyl acetate copolymer resin, a polyester resin, a urethane resin, a chlorinated polyolefin resin, excluding fluororesin particles. ,
20 to 50% by weight of at least one resin selected from the group consisting of chlorinated rubber resin, ethylene-vinyl acetate copolymer resin, polyamide resin and cellulose resin, and toluene, ethyl acetate, isobutyl acetate, methyl ethyl ketone, methyl isobutyl ketone And the like (preferably 100% by weight excluding fluororesin particles).

[0014] The OP varnish composition of the present invention may contain the above-mentioned fluororesin particles in an active energy ray-curable OP varnish. In the active energy ray-curable OP varnish composition, the active energy ray-curable OP varnish can be cured by an active energy ray such as an ultraviolet ray or an electron beam. An OP varnish, an active energy ray-curable OP varnish for silk screen printing, an active energy ray-curable OP varnish for letterpress printing, and the like can be used.
Such an active energy ray-curable OP varnish basically contains an active energy ray-curable resin component composed of a monomer or oligomer having an ethylenically unsaturated double bond, and if necessary, a photocuring initiator. , Resin, sensitizer,
It may contain an extender and other various additives. Examples of the active energy ray-curable resin component comprising a monomer or oligomer having an ethylenically unsaturated double bond include (meth) acrylic acid esters such as ethylene glycol di (meth) acrylate and propylene glycol di (meth) acrylate 1,4-butanediol di (meth) acrylate, polyethylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, pentaerythritol tri (tetra) (meth) acrylate, It is a polyhydric alcohol (meth) acrylate such as dipentaerythritol penta (hexa) (meth) acrylate. A mixture of two or more of these can also be used. Monomer or oligomer having an ethylenically unsaturated double bond, 5 to 100% by weight as a solid content of an active energy ray-curable OP varnish composition
Is preferably used.

As the photo-curing initiator that can be used in the active energy ray-curable OP varnish composition, generally available photo-curing initiators can be used. Examples of such a photo-curing initiator include, for example, Irgacure 6
51, Irgacure 184, Darocur 1173,
Irgacure 907, Irgacure 369 (all manufactured by Ciba Specialty Chemicals); Kayacure DETX, Kayacure ITX (all manufactured by Nippon Kayaku);
Benzophenone, acetophenone, 4,4'-bisdiethylaminobenzophenone, benzoin, benzoin ethyl ether and the like, and these can be used alone or in combination of two or more. In addition, an aliphatic amine such as n-butylamine, triethylamine, ethyl p-dimethylaminobenzoate, or an aromatic amine may be used as a sensitizer together with the photocuring initiator. The photo-curing initiator and the sensitizer are contained in the active energy ray-curable OP varnish in an amount of 1
-20% by weight.

The resin that can be blended with the active energy ray-curable OP varnish composition of the present invention is used as necessary for the purpose of improving the strength of the OP varnish film, improving the adhesion of the varnish to printing paper, and the like. Things. As such a resin, an alkyd resin, a polyester resin, or a petroleum resin can be used, and further, a resin modified with (meth) acrylic acid can be used. Examples of the (meth) acrylic acid modified resin include urethane (meth) acrylate, epoxy (meth) acrylate, and polyol (meth) acrylate having a (meth) acryloyl group in one molecule. These resins are OP
It can be used in the varnish composition at a ratio of 0 to 90% by weight.

In the active energy ray-curable OP varnish composition, various additives can be used, if necessary, as long as the effects of the present invention are not impaired. Such additives include, for example, anti-friction improvers, antioxidants, set-off inhibitors, preservatives, as well as O.sub.2O during manufacturing or storage.
A thermal polymerization inhibitor such as hydroquinone for preventing gelling of the P varnish is included.

The solid content in the active energy ray-curable OP varnish is the solid content after curing by irradiation with active energy rays. OP used in the present invention
The varnish composition may contain an ultraviolet absorber, whether it is an active energy ray-curable type or an active energy ray non-curable type. The ultraviolet absorber imparts light resistance to the OP varnish composition, and a benzotriazole-based ultraviolet absorber can be preferably used. As an example of such a benzotriazole-based ultraviolet absorber, 2- (5
-Methyl-2-hydroxyphenyl) benzotriazole, 2- [2-hydroxy-3,5-bis (α, α-dimethylbenzyl) phenyl] -2H-benzotriazole, 2- (3,5-t-butyl- 2-hydroxyphenyl) benzotriazole, 2- (3-t-butyl-5-
Methyl-2-hydroxyphenyl) benzotriazole, 2- (3,5-di-t-butyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2- (3
5-di-t-amyl-2-hydroxyphenyl) benzotriazole, 2- (2'-hydroxy-5'-t-octylphenyl) benzotriazole, methyl-3-
[3-tert-butyl-5- (2H-benzotriazole-
2-yl) -4-hydroxyphenyl] propinate and polyethylene glycol (molecular weight: about 300), hydroxyphenylbenzotriazole derivatives and the like. These ultraviolet absorbers are all commercially available.

The ultraviolet absorber is a solid content (fluorine resin particles (and ultraviolet absorber) of the overprint varnish composition.
1% by weight or more, preferably 1 to
It is added at a rate of 100% by weight. If the amount of the ultraviolet absorber is less than 1% by weight, sufficient light resistance may not be obtained. More preferably, the ultraviolet absorber is added at a ratio of 20% by weight or less.

In applying the OP varnish composition of the present invention, first, a printing ink film constituting information that can be recognized as a concept drive type is formed on at least a part of the printing paper.

As the printing paper, any sheet can be used as long as it is sheet-shaped and has a printing ink receptivity. Among them, paper mainly composed of pulp and plastic film mainly composed of synthetic resin Alternatively, synthetic paper containing a synthetic resin as a main component and having improved printing ink receptivity can be preferably used.

As the paper containing pulp as a main component, for example, unwashed paper, medium quality paper, high quality paper and the like can be used. As the synthetic paper, for example, one obtained by applying a printing ink receptive paint on one or both sides of a nonporous plastic film and forming a coating film thereof to improve the printing ink receptivity can be used. As such a plastic film, for example, a polyvinyl chloride film, a polyethylene film, a polypropylene film, a polyester film and the like can be exemplified. As the above-mentioned paint, a material containing a matting agent can be used. As the matting agent, silica, calcium carbonate, barium sulfate and the like can be used.

In addition, as the above-mentioned synthetic paper, a plastic film is foamed to form a large number of fine holes, and a printing ink receptivity is improved by these fine holes, and a solvent-soluble fine powder is mixed. The above-mentioned fine powder of the formed plastic film is dissolved and removed with a solvent, and the fine powder-existing site is removed as fine pores, and the printing ink receptivity is improved by the fine pores, or the fine powder is mixed. The plastic film formed by stretching is stretched, and a fine crack is generated between the fine powder and the plastic by the stretching, and the printing ink receptivity improved by the fine crack can be applied.

It is also possible to use a printing paper having a coating layer in which a clay material is dispersed in a synthetic resin binder on the surface thereof. Examples of such clay materials include, for example, talc, clay, kaolin, and the like. Examples of the synthetic resin binder include polyolefins such as polyethylene and polypropylene, polyvinyl chloride, polyvinyl acetate, and vinyl chloride-vinyl acetate copolymer. Various synthetic resins such as coalescence can be used. In the case where a polyolefin is used as the synthetic resin binder, it is desirable to increase the adhesion to the OP varnish of the present invention by oxidizing the polyolefin on the surface of the coating layer. As the oxidation treatment, corona discharge treatment, flame treatment, ozone treatment and the like can be used. It is desirable that the coating layer has a flat surface.

It is sufficient that such a coating layer is provided on the side on which the overprint layer is formed, and it is not necessary to provide the coating layer on both sides of the printing paper. As the printing ink formed on the printing paper, a penetrating ink, an ultraviolet curable ink, an electron beam curable ink, and a solvent evaporation ink can be preferably used.

Such a printing ink film does not need to be provided on the entire surface of the printing paper, but may be provided on a part of the printing ink film in a shape constituting visible information that can be recognized as a concept drive type. Here, visible information that can be conceptually driven is
The above information is recognized based on the existing knowledge of the visible information observer. Unlike visible information that relies exclusively on stimulus-driven perception (for example, decorative patterns such as wood grain patterns),
This means that the shape of the printing ink film has a meaning and the meaning can be recognized. It mainly consists of characters and symbols (for example, symbols for telephone and mail, fine weather and rainy weather used in weather maps). , Symbols indicating copyright and trademark rights, railway symbols and contours used on maps,
A photograph of a celebrity such as a celebrity), or various signs and lines used in a floor plan of a building, and usually embodies the value of the printed matter.

The OP varnish composition of the present invention is applied by the above-mentioned printing method so as to cover at least the printing ink film on the printing surface of the printing paper which has been printed with the predetermined printing ink. Usually, the thickness of the OP varnish layer is about 0.5 to 1.5 μm, although it depends on the printing method.

In the present invention, polyolefin particles or silica particles may be used instead of the fluororesin particles in the OP varnish composition. As the polyolefin particles, low-density polyethylene particles, high-density polyethylene particles, medium-density polyethylene particles, polypropylene particles, polybutene particles, polypentene particles, or particles composed of a copolymer thereof can be used,
Further, copolymer particles obtained by copolymerizing a small amount of a monomer other than the olefin with the olefin monomer without causing any harm can be used. Among these, polyethylene particles are preferred. The average volume particle size is preferably from 1 to 30 μm. The silica particles have an average volume particle of 1 to 40.
Those having a size of μm are preferred.

FIG. 1 is a schematic view of a BB type four-color web offset web offset press. This offset rotary press has the configuration of a normal offset rotary press except that an OP varnish application section for applying the OP varnish composition of the present invention is provided between a printing section and a drying device.

Referring to FIG. 1, a printing paper (web) PP wound up in a roll shape is unwound from a paper feeder 11 and is actively fed in an infeed device 12 so that the printing unit 13 Sent to The printing unit 13 includes four BB type units 13 arranged in tandem in the illustrated example.
a to 13d, for example, yellow ink in the BB unit 13a, red ink in the BB unit 13b, indigo ink in the BB unit 13c, BB
Black ink can be printed on both sides in the shape unit 13d. The printing paper PP on which the predetermined printing ink has been printed by the printing unit 13 is sent to the OP varnish application unit 14, where the OP varnish composition of the present invention is applied. Thereafter, the printing paper is sent to the hot-air drying device 15 and dried, then cooled by the cooling unit 16, folded by the folding machine 17 and discharged from the rotary press. When an active energy ray-curable OP varnish composition is used as the OP varnish composition,
The OP varnish is sent to the drying device 15 after passing through an active energy ray irradiation unit (not shown) to cure the OP varnish. In any case, when the printed material is folded by the folding machine 17, the printed surface is covered and protected by the OP varnish composition of the present invention, so that the printed surface is not damaged by friction.

[0031]

As described above, according to the present invention, the printing surface is coated with the OP varnish composition after printing the ink on the unwound printing paper and before folding and discharging. In addition, printed matter of good quality can be manufactured without being damaged by friction when folded.

[Brief description of the drawings]

FIG. 1 is a schematic view of a web offset rotary press suitable for carrying out a method for producing a printed material according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Paper feeder 12 ... In-feed device 13 ... Printing part 14 ... OP varnish application part 15 ... Drying device 16 ... Cooling part 17 ... Folding machine

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideki Hasegawa 2-3-113 Kyobashi, Chuo-ku, Tokyo Inside Toyo Ink Manufacturing Co., Ltd.

Claims (2)

[Claims] 1. A method for producing printed matter by printing on a rolled-up printing paper, comprising unwinding a printing paper, printing a printing ink on at least one side thereof, and then coating the printing surface. A method for producing a printed matter, comprising applying an overprint varnish composition containing fluororesin particles having a volume average particle diameter of 1 to 10 μm, drying the resultant, and folding and discharging the resulting printed matter. 2. A printed matter produced by the method for producing a printed matter according to claim 1.