JP2009172943A - Printed matter and manufacturing method thereof - Google Patents

Abstract

An object of the present invention is to provide a printed matter having a decorative expression on the outer surface of a high-grade paper box or the like and a method for stably and simply manufacturing the printed matter.
A surface comprising a plurality of substantially parallel linear liquid-repellent varnish layers provided on a substrate provided with a pattern printing layer, and a UV-cured varnish layer formed so as to protrude in the meantime. A line having a liquid-repellent varnish layer having a width of more than 0.06 mm and less than 0.36 mm, and a UV-curing varnish layer having a line width of more than 0.14 mm; Manufacturing method of printed matter characterized by being less than 56 mm [selection figure] FIG.

Description

  The present invention relates to a printed material mainly composed of paper or a plastic sheet, and more particularly to a printed material that exhibits a brilliant visual effect by decorating using a difference in reflection on the surface and a method for manufacturing the printed material.

  Many printed materials that produce a unique visual effect due to surface reflection have been proposed mainly for the purpose of giving a three-dimensional effect to printed patterns.

  As an attempt to give a three-dimensional effect to a printed pattern, there is a method of actually embossing a surface (molding of irregular shapes) and further emphasizing the three-dimensional effect by coloring the pattern corresponding to the surface shape. Since this method is based on actual surface irregularities, the relationship between the visual effect and the actual shape matches and is an excellent method.

  However, when applied to paper such as wrapping paper containers, embossing on the cardboard of the base material is difficult, and if embossed mechanically, there is a risk that the original function of content protection may be impaired. It was difficult to apply these methods.

  Of the attempts to give a three-dimensional effect to a pattern, many methods have been proposed for visually giving a three-dimensional effect using the difference in surface gloss regardless of actual embossing.

  Many methods have been disclosed for forming a surface state in which both the gloss (gloss) and the matte (matte) are mixed on the surface of the molded body, including a transfer method. The method of using the visual effect that the matte part appears to sink and the gloss part appears to float in the adjacent glossy areas of the surface can be applied even if the actual surface is not uneven. Therefore, attempts have been made in various fields where the actual embossing method cannot be applied.

  There has been proposed a method of forming a film with gloss varnish on the surface other than the mat ink after printing on the surface of the substrate with the mat ink. There has also been proposed a method for producing a decorative board that emphasizes the three-dimensional effect by printing on the surface mat coat with a beaded ink on portions other than the conduit pattern. There is also shown a method for producing a cosmetic material in which gloss varnish is applied to the entire surface of the wood grain printing other than the conduit portion, and the conduit portion is printed with matte ink from above.

  There has also been proposed a method in which a matte varnish is applied to the entire surface of the wood grain printing other than the conduit portion, and after the conduit portion is printed from above, a gloss varnish is applied to the region other than the conduit portion. Furthermore, a method for producing a decorative sheet is also proposed in which gloss varnish is applied to the entire surface of a printed pattern and then the conduit portion is printed with matte ink.

  In the above-described method, the ink that is not covered with the top coat is exposed on the surface of the product, so that there is a problem in terms of resistance and other physical properties in applications that originally require a top coat as a surface protective layer. Remain.

  Wallpaper coated with gloss varnish and matte varnish on the surface, decorative sheet with a surface layer with different glossiness, decorative sheet coated with matte and glossy surface on the paper substrate, matte varnish in a pattern form from the entire surface glossy Each printed paper container is presented. Although these methods can surely provide a decorative effect due to the difference in gloss on the surface, one of the problems is that it is difficult to register the transparent coating agent separately.

  As one method for solving this problem, there has been proposed a method in which a gloss varnish is printed with a pattern after matte varnish is applied to the entire surface of the printed pattern. This method helps to ensure stability in actual production by avoiding the difficult problem of registering transparent varnish and transparent varnish as compared with a method of printing mat varnish and gloss varnish on a pattern.

  As another method for avoiding the difficult problem of registering the transparent varnish and the transparent varnish, a method utilizing the liquid repellency of one varnish coating to the other coating liquid has been proposed. In this method, the problem of misregistration between the transparent varnishes is mechanically avoided, but in order to stably realize the effect of removing the second coating liquid from the first coating layer by the liquid repellency, the coating liquid Usually, a 100% solids resin such as a UV curable varnish is applied.

  Conventionally, when a printed expression with a matte feeling is applied to the outer surface of a high-grade paper box or the like, a mat varnish to which an appropriate amount of a matting agent of a synthetic resin such as an olefin or alkyd synthetic resin or an inorganic material such as silica or kaolin is added. However, there was a drawback that the matte varnish rubbed the matte varnish, and the matte varnish rubbed the matte. In order to remedy this drawback, a printed matter in which an ultraviolet curable high gloss varnish is printed and cured, and then an ultraviolet curable low gloss varnish (matt varnish) is provided has been proposed.

  In addition, as a method of printing the liquid-repellent ink and the UV curable resin on top of each other, a varnish layer having liquid repellency is provided on a substrate having a print layer, and an ultraviolet curable gloss varnish layer is provided thereon. Also proposed is a method in which UV-curable high-gloss varnish repelled by a liquid-repellent varnish layer aggregates in spots on the liquid-repellent varnish layer and scatters light to give a printed expression with a matte feeling. ing.

As described above, in the general method of printing the liquid repellent ink and the UV curable resin on the base paper, the UV curable resin in the region above the liquid repellent ink becomes granular, for example, It was impossible to realize a stable repelling with a thin striped thin line pattern or the like.
Japanese Patent Laid-Open No. 5-16228 Japanese Patent No. 2775743 Japanese Patent Laid-Open No. 5-278189 JP 2000-62081 A JP-A-8-132578 JP 2004-114654 A JP 2006-282920 A JP 2007-229967 A

  It is an object to provide a printed matter having a decorative expression on the outer surface of a high-grade paper box or the like, and a method for stably and simply manufacturing the printed matter.

  According to the first aspect of the present invention, a plurality of substantially parallel linear liquid-repellent varnish layers provided on a substrate provided with a pattern printing layer and a UV-cured convexly formed therebetween are formed. A printed matter having a surface layer comprising a varnish layer, wherein the line width of the liquid repellent varnish layer is greater than 0.06 mm and less than 0.36 mm, and the line width of the UV curable varnish layer is The printed matter is characterized by being more than 0.14 mm and less than 0.56 mm.

  The invention according to claim 2 of the present invention is the printed matter according to claim 1, wherein the average thickness of the UV cured varnish layer is in the range of 5 μm to 8 μm.

  According to a third aspect of the present invention, a plurality of approximately parallel linear liquid-repellent varnish layers having a line width of more than 0.06 mm and less than 0.36 mm are formed on a substrate provided with a pattern printing layer. The space is provided to be greater than 0.14 mm and less than 0.56 mm, and a UV curing varnish is applied and cured on the liquid repellent varnish layer, and cured. It is a manufacturing method of this printed matter.

  The printed matter of the present invention is provided with a plurality of substantially parallel liquid-repellent varnish layers on a substrate having a print layer, and when the UV cured varnish is applied thereon, the liquid-repellent varnish layer is repelled. The UV cured varnish accumulated in the area between the lines is a printed matter having a surface that has been hardened by UV curing in a state where a kamaboko-shaped surface is formed by the surface tension, and therefore more than in the case of decoration by surface gloss difference A gorgeous decoration can be achieved.

  In the method based on the difference in gloss on the surface (gross matte), the gloss varnish and matte varnish are applied to the surface of the printed material in synchronization with the pattern, so that the gloss part rises and the mat part sinks. There is a feature that can express a three-dimensional feeling. However, a brilliant effect including irregularities such as the glitter of reflected light being different in each viewing direction due to the lens effect as in the case of the present invention cannot be expected. As described above, the printed matter produced by the method of the present invention can scatter reflected light through the lens to realize a brilliant surface decoration.

  In the printed matter of the present invention, the line width, the coating interval, and the coating pitch of the liquid repellent varnish are in the range of more than 0.06 mm to less than 0.36 mm, and more than 0.14 mm to less than 0.56 mm, respectively. Thus, when the average coating film thickness of the UV varnish applied from above is 5 μm to 8 μm, defects due to the UV varnish remaining on the liquid repellent varnish layer can be prevented.

  Furthermore, according to the method of the present invention, since the entire surface of the pattern printing is covered with the liquid repellent varnish layer and the cured layer of the UV curable varnish, the surface resistance is also improved. Further, since the UV-cured varnish repelled by the liquid repellent varnish layer forms a kamaboko-like surface, slipping of the surface can be prevented when used as a container, and handling becomes convenient.

The printed matter of the present invention will be described in detail below with reference to the drawings.
FIG. 1 is an enlarged schematic perspective view of an example of the printed material of the present invention. FIG. 2 is a schematic plan view of an example of the printed material of the present invention.

  For example, as shown in FIG. 2, the printed matter of the present invention has a plurality of substantially parallel linear shapes having a line width (L1) of more than 0.06 mm and less than 0.36 mm on a substrate provided with a pattern printing layer. The liquid-repellent varnish layer 2 is provided so that the distance (L2) is more than 0.14 mm and less than 0.56 mm, and the UV-cured varnish 3 is laminated on the liquid-repellent varnish layer to have an average coating thickness of 5 μm to 8 μm. It is manufactured by applying and curing the amount. FIG. 1 schematically shows a part of the cross section of FIG. 2. When a liquid-repellent varnish layer 2 is provided on the pattern printing layer 1 and a UV curing varnish is applied, the liquid-repellent varnish layer 2 The repelled UV cured varnish is cured while forming a kamaboko-like surface due to surface tension between the lines of the liquid repellent varnish layer 2. The state of this UV cured varnish layer is typically a shape having the embossed height H1 of FIG.

When the coating amount of the UV curing varnish does not fall within the above range in terms of the average film thickness, that is, when the coating amount is less than 5 μm, the intended decorative effect cannot be obtained because the swell of the surface of the UV curing varnish layer is insufficient. On the other hand, if it exceeds 8 μm, the UV cured varnish layer may exceed the limit that can be supported by the surface tension and cured on the liquid repellent varnish layer, resulting in a lump of particles and the desired decorative effect may not be obtained.

  If the line width of the liquid repellent varnish layer is less than 0.06 mm, the UV cured varnish may cover the liquid repellent varnish layer due to insufficient repellency of the UV cured varnish, and exceeds 0.36 mm. The UV-cured varnish that has been repelled cannot move between the lines of the liquid-repellent varnish layer, and a granular lump is scattered on the liquid-repellent varnish layer, so that the intended decorative effect may not be obtained.

  The distance between the liquid-repellent varnish layers is also important for obtaining a desired decorative effect. When the distance is less than 0.14 mm, the UV cured varnish does not collect between the lines and is repelled on the liquid-repellent varnish layer. In other words, it may become granular, and if it exceeds 0.56 mm, the convex surface of the UV cured varnish layer obtained by the effect of surface tension becomes lower and the cross section becomes close to a trapezoid, so that the desired decoration effect is obtained. It may not be obtained.

  Based on the above, an embodiment of the present invention will be described in detail.

  If the base material provided with the pattern printing layer of this invention is a sheet-like or film-like printed matter, there will be no limitation in particular. Examples thereof include paper, plastic film and sheet, metal foil, metal plate, and wood. Considering heat shrinkage stress applied during the process, it is desirable that there is a certain degree of hardness and thickness. When the original fabric is paper, typically a paperboard such as a coated ball, an uncoated ball, a manila ball, a craft ball, a colored ball, or a corrugated cardboard is used.

  Examples of the plastic film that can be used as the raw material of the base material of the present invention include polyester films such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), polyolefin films such as polyethylene (PE) and polypropylene (PP), and polystyrene. Biodegradable plastic films such as films, polyamide films, polyvinyl chloride films, polycarbonate films, polyacrylonitrile films, polyimide films and polylactic acid films are used, which may be either stretched or unstretched. What has dimensional stability is good.

  The ink for pattern printing for providing a pattern printing layer on the original fabric as a base material only needs to be capable of printing a liquid-repellent varnish and a UV-cured varnish on the surface and has the necessary adhesion. It is optional as long as it conforms to the printing method. For example, typically, when the ink type is an organic solvent type, polyamide, vinyl, nitrocellulose, etc. are used as the resin, and toluene, ester, ketone, alcohol, etc. are used as the solvent. Further, when the ink type is water-based, maleic acid type or acrylic type is used for the resin, and water, alcohol, glycol or the like is used for the solvent.

  The printing method of the pattern printing layer is not particularly limited, and printing methods such as offset, gravure, flexo, and screen can be used.

  A liquid-repellent varnish layer is partially provided in a plurality of substantially parallel linear patterns on a substrate having a pattern printing layer, and UV curing varnish is applied on the liquid-repellent varnish layer and then cured. .

The liquid-repellent varnish used in the present invention is not particularly limited, and wetting adjustment with a low surface power is applied to resin components such as cellulose, polyamide, vinyl chloride, modified polyolefin, rubber acrylic, and urethane. Agents and those added with silicone-based (fluorine-based) additives such as silicone oil can be used. In such a liquid-repellent varnish, the silicone additive, etc. in the varnish composition is localized on the surface, and a varnish film layer having a lower surface tension than the UV-cured varnish applied from above is formed. Recesses are formed by repelling a UV curable varnish having a relatively high surface tension.

  Examples of silicone-based liquid repellents such as silicone oil used for liquid repellent varnish include epoxy modification, carboxyl modification, amino modification, carbinol modification, alcohol modification, phenol modification, methacryl modification, mercapto modification, and heterofunctional modification. Reactive silicone: Non-reactive silicone such as polyether-modified, methylstyryl-modified, alkyl-modified, alkylaralkyl-modified, fatty acid-modified, alkoxy-modified, fluorine-modified; dimethylsilicone, methylphenylsilicone, diphenylsilicone, methylhydrogensilicone Straight silicone is mentioned.

  Among these silicone oils, non-reactive silicone and linear silicone are preferably used. A specific example is a dimethyl silicone-polyoxyalkylene copolymer. Examples of the fluorine-based liquid repellent include general fluorine oil and fluorine-containing acrylate (fluorine acrylate).

  Other additives used for liquid repellent varnish include, for example, anti-friction agents, anti-blocking agents, slip agents, and anti-scratch agents such as carnauba wax, wax, lanolin, montan wax, paraffin wax, microcrystalline wax. Synthetic waxes such as natural wax, Fischer-Trops wax, polyethylene wax, polypropylene wax, polytetrafluoroethylene wax, polyamide wax and the like can be used.

  The printing method of the liquid repellent varnish is not particularly limited, and printing methods such as offset, gravure, flexo, and screen can be used. However, the line width of the liquid repellent varnish layer is more than 0.06 μm to 0.36 μm. Is less than that and the width between lines is more than 0.14 μm to less than 0.56 μm, an offset printing method or a gravure printing method suitable for high-definition printing is desirable.

  The drying method of the liquid repellent varnish is not particularly limited, and any of heat drying and preferably UV curing can be used. As the UV curable liquid repellent varnish, a mixture of an acrylic or unsaturated polyester prepolymer, a monomer component such as acrylic or styrene, and a photopolymerization initiator and wax or silicon is used. .

  The UV curing varnish applied from the top of the liquid-repellent varnish layer is mainly composed of an acrylic or other polymer or prepolymer having an ethylenically unsaturated double bond, an ethylenic unsaturated such as an acrylic monomer. Examples of the varnish include a monomer component having a double bond, a photopolymerization initiator, and other additives.

  Examples of the polymer or prepolymer used in the UV curing varnish include polyvinyl chloride, poly (meth) acrylic acid ester, epoxy resin, polyurethane resin, cellulose derivatives (for example, ethyl cellulose, cellulose acetate, nitrocellulose), and vinyl chloride acetic acid. Examples thereof include a synthetic rubber such as a vinyl copolymer, a polyamide resin, a polyvinyl acetal resin, a diallyl phthalate resin, and a butadiene-acrylonitrile copolymer. These resins can be used alone or in combination of two or more thereof. In either case, a resin that is soluble in a monomer having an ethylenically unsaturated double bond is used.

  Monofunctional monomers used in the UV curing varnish include alkyl (2 to 18 carbon atoms) (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, hexyl (meth) acrylate, octyl (meth) acrylate, dodecyl There are (meth) acrylate and stearyl (meth) acrylate, and further benzyl (meth) acrylate, isobornyl (meth) acrylate, cyclohexyl (meth) acrylate, tricyclodecane monomethylol (meth) acrylate and the like are exemplified.

  Polyfunctional monomers used for UV curing varnish include (meth) acrylates such as ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate , Tripropylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, butylene glycol di (meth) acrylate, pentyl glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, hydroxypivalyl hydroxypivalate di (Meth) acrylate (commonly called Manda), hydroxypivalyl hydroxypivalate dicaprolactonate di (meth) acrylate, 1,6 hexanediol di (meth) Acryle, 1,8-octanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, 1,2-hexadecanediol di (meth) acrylate, 2-methyl-2,4-pentanediol di ( (Meth) acrylate, bisphenol A tetraethylene oxide adduct di (meth) acrylate, bisphenol F tetraethylene oxide adduct di (meth) acrylate, water-added bisphenol A tetraethylene oxide adduct di (meth) acrylate, water-added bisphenol F tetra Ethylene oxide adduct di (meth) acrylate, water-added bisphenol A di (meth) acrylate, water-added bisphenol F di (meth) acrylate, glycerin tri (meth) acrylate, trimethylolpropane tri (meta) Acrylate, trimethylolpropane tricaprolactonate tri (meth) acrylate, trimethylolethane tri (meth) acrylate, trimethylolhexane tri (meth) acrylate, trimethyloloctane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, Pentaerythritol tetra (meth) acrylate, diglycerin tetra (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, ditrimethylolpropane tetracaprolactonate, tetra (meth) acrylate, ditrimethylolethane tetra (meth) acrylate, ditri Methylolbutanetetra (meth) acrylate, ditrimethylolhexanetetra (meth) acrylate, ditrimethylolocta Tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, tripentaerythritol hexa (meth) acrylate, tripentaerythritol hepta (meth) acrylate, tripentaerythritol octa (meth) acrylate Etc. are exemplified.

  As the reactive oligomer used for the UV curing varnish, alkyd acrylate, epoxy acrylate, urethane-modified acrylate and the like can be used.

  Examples of the radical polymerization initiator used for the UV curing varnish include benzophenone, 4,4-diethylaminobenzophenone, diethylthioxanthone, 2-methyl-1- (4-methylthio) phenyl-2-morpholinopropan-1-one, 4- Benzoyl-4′-methyldiphenyl sulfide, 1-chloro-4-propoxythioxanthone, isopropylthioxanthone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxy-cyclohexyl-phenyl ketone, bis-2 , 6-Dimethoxybenzoyl-2,4,4-trimethylpentylphosphine oxide, 1- [4- (2-hydroxyethoxy) -phenyl] -2-hydroxy-2-methyl-1-propan-1-one, 2 , 2-Dimethyl-2-hydroxyacetate Phenone, 2,2-dimethoxy-2-phenylacetophenone, 2,4,6-trimethylbenzyl-diphenylphosphine oxide, 2-benzyl-2-dimethylamino-1- (morpholinophenyl) -butan-1-one, etc. Is mentioned. A photo accelerator such as p-dimethylaminobenzoic acid ethyl ester or pentyl 4-dimethylaminobenzoate may be used in combination with the photopolymerization initiator.

  As the UV varnish coating method, flexo, gravure, offset, roll coating, etc. can be used according to the purpose, but the coating is performed with a stable coating amount when the average coating thickness is between 5 μm and 8 μm. Therefore, a flexo coating method or a gravure coating method is desirable. It is also possible to use a flexo coater unit of an offset printing machine in order to apply the liquid repellent varnish and the UV curable varnish in one step.

<Example 1>
As a raw fabric, a printed cardboard having a basis weight of 270 g / m ² was used for pattern printing with an offset printing machine to prepare a substrate provided with a pattern printing layer. Next, using the Dicure High Bright Medium EM (Dainippon Ink Chemical Co., Ltd.) as the liquid-repellent varnish, the concentric pattern shown in FIG. Using a flexo coater unit attached to the printing press, Dicure Clear UV-1601EM (manufactured by Dainippon Ink & Chemicals, Inc.) was applied to the entire surface as a UV curing varnish, and UV cured to produce a printed matter.

  The embossed shape of the UV cured varnish layer on the surface of the printed material and the embossed height H1 were compared by changing the size of the printing pattern of the liquid repellent varnish under the condition that the average coating thickness of the UV cured varnish was constant (6.4 μm) (circle) 2-circle 14). Table 1 shows the results of measuring the surface shape and dimensions of these printed materials using an optical microscope and a laser microscope.

<Example 2>
As a raw fabric, a printed cardboard having a basis weight of 270 g / m ² was used for pattern printing with an offset printing machine to prepare a substrate provided with a pattern printing layer. Next, using the Dicure High Bright Medium EM (Dainippon Ink Chemical Co., Ltd.) as the liquid-repellent varnish, the concentric pattern shown in FIG. Using a flexo coater unit attached to the printer, Dycure Clear UV-1601EM (manufactured by Dainippon Ink & Chemicals, Inc.) is used as a UV curing varnish so that the average film thickness is 5.0 μm and 6.5 μm. The entire surface was coated with a coating amount and then cured with ultraviolet rays to prepare a printed matter of the present invention.

  The embossed shape and the embossed height of the UV cured varnish layer on the surface of the printed matter are changed by changing the average coating thickness of the UV cured varnish under the condition that the dimension of the printing pattern of the liquid repellent varnish is constant (line width 0.12 mm, line spacing 0.28 mm). H1 was compared (circle 6).

  Table 1 shows the results of measuring the surface shape and dimensions of these printed materials using an optical microscope and a laser microscope.

  In the case of the circle 8 in which the embossed shape changes from a semi-cylindrical shape to a trapezoidal shape because the line width of the liquid repellent varnish layer is small and the line width of the UV cured varnish is large, adjacent UV cured varnish layers start to be connected due to insufficient liquid repellency. The present invention includes the case of circle 2 and circle 9 and the case of circle 14 in which the liquid-repellent varnish-like UV cured varnish does not form a film but is scattered and cured in a granular form. It was confirmed that an embossed shape having the decorative effect intended by the present invention could not be obtained under conditions that deviated from the range determined by the manufacturing method.

  The condition within the range determined by the manufacturing method of claim 3 of the present invention is a stable and simple printed material with a decorative print having a brilliant decorative appearance such as a glittering feeling that changes depending on the viewing angle. Obtained by a simple manufacturing method.

It is a perspective section expansion schematic diagram of the printed matter of the present invention. It is a plane schematic diagram of the printed matter of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Printing layer 2 ... Liquid-repellent varnish layer 3 ... UV hardening varnish layer L1 ... Line width of liquid-repellent varnish layer L2 ... Line spacing of liquid-repellent varnish layer L3 ... Liquid-repellent varnish layer Line pitch H1 ... Emboss height of UV-cured varnish layer

Claims (3)

  On the base material provided with the pattern printing layer, it has a surface layer composed of a plurality of substantially parallel linear liquid-repellent varnish layers and a UV-cured varnish layer formed so as to rise in a convex shape therebetween. The line width of the liquid repellent varnish layer is more than 0.06 mm and less than 0.36 mm, and the line width of the UV cured varnish layer is more than 0.14 mm and less than 0.56 mm. Characteristic printed matter.   The printed matter according to claim 1, wherein the average thickness of the UV-cured varnish layer is in the range of 5 μm to 8 μm.   A plurality of substantially parallel linear liquid-repellent varnish layers having a line width of more than 0.06 mm and less than 0.36 mm are provided on a substrate provided with a pattern printing layer with a spacing of more than 0.14 mm and 0.56 mm. The method for producing a printed matter according to claim 1, wherein a UV varnish is applied and cured so as to overlap with the liquid-repellent varnish layer.