JP5630055B2 - Pattern printing sheet - Google Patents

Description

  The present invention relates to a pattern printing sheet used in a handwritten information input device capable of converting a handwritten writing shape into digital information and used by being attached to the surface of a medium to be written.

In recent years, there has been an increasing need to convert handwritten characters, pictures, symbols, and the like into electronic data that can be handled by an information processing device. In particular, handwritten information can be processed in real time without passing through a reading device such as a scanner. There is an increasing demand for a method for inputting data to, etc.
For example, Patent Document 1 discloses a transparent sheet that is mounted on the front surface of a display device, and on which a dot pattern that can provide position information for indicating the position of an input locus by an input electronic pen or the like is printed. Is disclosed. The transparent sheet has the dot pattern printed using ink that emits light that can be read by irradiating light of a predetermined wavelength, and has a function of providing this as position information by an input locus reading unit. Is. However, Patent Document 1 does not describe the kind of ink that embodies such a transparent sheet, or the device of the orientation of the printing surface and the position information, but describes the idea or desire of the transparent sheet. However, there is no illustration of a specific transparent sheet.

On the other hand, the transparent surface has a printing surface formed by printing a transparent pattern having infrared reflective regularity on the surface of the transparent substrate, and the printing surface is mounted on the front surface of the display device capable of displaying an image. The transparent pattern includes a material that reflects infrared rays, and the transparent pattern irradiates infrared rays from the back side of the printed surface using an input terminal capable of irradiating and detecting infrared rays, An infrared reflection pattern-printed transparent sheet that can provide information on the position of the input terminal on the transparent sheet by reading the infrared reflection pattern has been proposed (see Patent Document 2).
In addition, when information is written on the information writing surface with an electronic pen, a dot pattern printed in the vicinity of the pen tip is read by the imaging unit built in the electronic pen and transmitted from the transmission unit to the external communication device When the design other than the dot pattern is printed on the information description surface, the dot pattern is printed first, and the design is printed thereon. An electronic pen-description paper characterized by the above has been proposed (see Patent Document 3).
The pattern-printed transparent sheet disclosed in Patent Document 2 is used by being installed on the front surface of the display, and the electronic pen-description paper disclosed in Patent Document 3 is used as an input pad.

JP 2003-256122 A JP 2008-26958 A JP 2008-173859 A

In order to perform interactive operations during lectures and meetings, it may be necessary to convert handwritten characters, pictures, symbols, etc. into electronic data and project them onto a projection screen through a projector or the like. Furthermore, it is very useful if an image shown on a projection screen is directly written, captured as digital information in real time, and the writing can be projected through a projector.
On the other hand, when the above interactive conference management such as brainstorming is not necessary, it is effective to use the projection screen as a writing board such as a white board.
As such a projection screen and whiteboard, equipment with various functions is extremely useful from the viewpoint that it can be used for various purposes with a single base material, and from the viewpoint of saving space in the conference room. Is also effective.

In order to provide the pen input device as described above with a whiteboard function and a projection screen function, the whiteboard sheet or the surface of the pattern printing sheet as disclosed in Patent Documents 1 to 3 is simply used. It may be necessary to laminate a projection screen sheet. However, in practice, it is not easy to give the function of a whiteboard and / or a projection screen without impairing the function of the pattern printing sheet.
In addition, although the white board is disclosed by the said patent document 1 as one of the writing objects, the dot pattern of a printing sheet should just be printed with the white or transparent ink substantially the same as a white board. Only described (Patent Document 1, Paragraph 0016), there is no disclosure about a specific method, and it cannot be said that an achievement means is disclosed.

Specifically, when a known dot pattern sheet is to have a whiteboard function, a method of laminating a functional sheet can be considered, but there are the following problems.
In other words, when a white-type whiteboard sheet is used, the basic function of not being able to read the dot pattern existing below it and writing it and capturing it as digital information in real time is impaired.
On the other hand, when a transparent whiteboard sheet is used, it is necessary to use a sheet with a high surface gloss in order to have a function as a whiteboard. The aptitude decreases. Furthermore, if the surface has a high gloss, the function as a projection screen cannot be satisfied, so that it cannot be used as a sheet for both a whiteboard and a video screen.

  Furthermore, it is conceivable to use a matte mat sheet such as a so-called fluorine film containing fluorine for the purpose of a sheet for both a white board and a video screen, but there is a problem in the scratch resistance of the surface. That is, there is a problem that the readability deteriorates due to scratches on the surface due to the use of the electronic pen or the dot pattern. Further, the existing fluorine film has a gloss value of about 60 at a value of about 30, and if it has such a gloss, a suitable projection function cannot be exhibited. In order to further reduce the gloss of the fluorine film, embossing is generally performed. However, there is a problem that the dot pattern is deformed due to the shape change due to the embossing, and proper reading cannot be performed. Further, when considering use as a whiteboard, there is a problem that the marker erasability is lowered by the embossing process.

  An object of the present invention is to have a function as a projection screen capable of projecting character data, image data, etc. through a projector or the like, and further, writing can be performed on the screen as digital information in real time. A pattern printing sheet and a multifunctional projection screen using the pattern printing sheet for obtaining a projection screen having a function capable of capturing and reflecting on a projection screen and simultaneously having a function usable as a whiteboard The purpose is to provide.

As a result of intensive studies in order to solve the above problems, the inventors of the present invention have a pattern printing in which a patterned printing layer having regularity, a primer layer, and a surface protective layer are laminated in this order on a substrate. It has been found that the above-mentioned problem can be solved by enabling the position information of the input terminal to be provided by the pattern of the print layer and controlling the 60-degree gloss value of the surface within a specific range. The present invention has been completed based on such findings.
That is, the present invention is a pattern printing sheet in which a regular patterned printing layer, a primer layer, and a surface protective layer are laminated in this order on a substrate, and the ink constituting the printing layer is colored. The printing layer can contain information on the position of the input terminal on the pattern printing sheet by reading the pattern from the surface protective layer side using the input terminal capable of detecting the pattern. The present invention provides a pattern printed sheet obtained by curing a curable resin composition containing a filler in a protective layer and having a 60 ° gloss value of 8 to 20.

  The projection screen using the pattern printing sheet of the present invention has a function of projecting character data, image data, etc. through a projector or the like, performs writing, captures the writing as digital information in real time, and reflects it on the projection screen Have a function as a whiteboard at the same time

It is a conceptual diagram which shows the cross section of the one aspect | mode of the pattern printing sheet of this invention. It is a conceptual diagram which shows the cross section of the one aspect | mode of the pattern printing sheet of this invention which has an contact bonding layer and a bonding base material.

The configuration of the pattern printing sheet of the present invention will be described in detail below with reference to FIGS.
The pattern printing sheet 1 of the present invention is formed by laminating a printing layer 3, a primer layer 4, and a surface protective layer 5 in this order on a substrate 2. The pattern printing sheet 1 shown in FIG. 2 has a printing layer 3, a primer layer 4, and a surface protective layer 5 laminated in this order on a substrate 2, and further an adhesive layer 6 and a bonding substrate 7 on the back side. Laminated in this order.

The substrate 2 is not particularly limited as long as it is normally used as a printing sheet, and in general, a plastic film can be suitably used. Examples of the plastic include those made of various synthetic resins. Synthetic resins include polyethylene resins such as polyethylene, polypropylene, polymethylpentene, and olefinic thermoplastic elastomers; vinyl resins such as polyvinyl chloride, polyvinylidene chloride, and ethylene-vinyl alcohol copolymers; polyethylene terephthalate, polybutylene terephthalate Polyester resins such as polyethylene naphthalate and polyester-based thermoplastic elastomers; Acrylic resins such as poly (meth) methyl acrylate, poly (meth) ethyl acrylate and poly (meth) butyl acrylate; nylon 6 or nylon 66, etc. Representative polyamide resin; cellulose triacetate resin; cellophane; polystyrene; polycarbonate resin; polyarylate resin.
Among these, it is necessary to have a certain degree of strength from the viewpoint of protecting a pattern to be described later against heat and physical impact, and polyester resin is preferable in that respect. Examples of the polyester resin include polyarylate, polycarbonate, ethylene terephthalate-isophthalate copolymer, and polyarylate in addition to the above-described polyethylene terephthalate (hereinafter sometimes referred to as “PET”), polybutylene terephthalate, and polyethylene naphthalate. Can be mentioned. Among these, polyethylene terephthalate, polybutylene terephthalate and the like are preferable, and polyethylene terephthalate is particularly preferable from the viewpoint of easy handling and cost.

The thickness of the base material 2 is not particularly limited and can be appropriately set according to the product characteristics, but a range of 25 to 400 μm is preferable. Within this range, the input terminal to be described later is preferable in that it does not easily dent due to writing pressure when writing with a pen tip such as an electronic pen with a hard tip. Moreover, it is preferable also in the point from which workability | operativity in the lamination with base materials, such as a steel plate and a magnet sheet, becomes favorable. From the above viewpoint, the thickness of the substrate 2 is more preferably in the range of 75 to 250 μm.
Moreover, an additive may be mix | blended with the synthetic resin used for the base material 2 as needed. Examples of the additive include a filler, a flame retardant, an antioxidant, a lubricant, a foaming agent, an ultraviolet absorber, and a light stabilizer.
The pattern printing sheet of the present invention can be used for various applications, but when used as a whiteboard and a projection screen, which are the most preferable applications, the substrate 2 is preferably white, It is preferable to blend colorants such as calcium carbonate, titanium oxide, mica, and talc. Moreover, the aspect which uses the transparent or semi-transparent thing as the base material 2, and laminate | stacks the contact bonding layer 6 and the bonding base material 7 on the back surface side (opposite side of the printing layer 3) is also preferable.
Moreover, it is preferable that the surface of the base material 2 has high smoothness from a viewpoint of the printability of the pattern mentioned later.

In the pattern printing sheet of the present invention, the printing layer 3 is formed on the substrate 2, and the printing layer is a pattern having regularity. The pattern is not particularly limited as long as the input terminal can detect the contrast between the pattern forming portion and the pattern non-forming portion, and the material is not particularly limited. can do.
Specifically, as the colorant, carbon black (black), iron black, titanium white, antimony white, yellow iron oxide, yellow lead, titanium yellow, petal, chrome vermillion, cadmium yellow, cadmium red, ferrocyan Inorganic pigments such as compound, ultramarine, cobalt blue, organic pigments or dyes such as quinacridone red, isoindolinone yellow, phthalocyanine blue, phthalocyanine green, metal pigments composed of scaly foil pieces such as aluminum and brass, titanium dioxide-coated mica, It is a pearlescent pigment made of scaly foil pieces such as basic lead carbonate, and these can be used alone or in combination.

As the ink used for forming the printing layer 3, an ink containing the above-described colorant in a binder and further appropriately mixing an extender pigment, a solvent, a stabilizer, a plasticizer, a catalyst, a curing agent and the like is used. The binder is not particularly limited, and examples thereof include polyurethane resins, vinyl chloride / vinyl acetate copolymer resins, vinyl chloride / vinyl acetate / acrylic copolymer resins, chlorinated polypropylene resins, acrylic resins, and polyesters. Arbitrary resins, polyamide resins, butyral resins, polystyrene resins, nitrocellulose resins, cellulose acetate resins and the like may be used alone or in combination of two or more.
In addition, the printing method of the printing layer 3 is not particularly limited, and a known method can be used. Examples thereof include an offset printing method, a flexographic printing method, a gravure printing method, a stencil printing method, and an ink jet printing method. However, among these, the ink jet printing method and the flexographic printing method are particularly preferable from the viewpoints of dot reproducibility and ink transferability described later.

Moreover, the pattern having regularity in the printing layer 3 is composed of, for example, a large number of independent dots, and is dispersed and arranged on the base material 2 (hereinafter sometimes referred to as “dot pattern”). These dots are arranged according to a predetermined rule, and the position on the pattern printing sheet is specified from the arrangement relation. A specific example of such a dot pattern is a so-called Anoto pattern according to the standard of Anoto.
Further, the pattern having regularity in the present invention is also exemplified in Patent Document 1. For example, a plurality of dot shapes are set, and the plurality of dots arranged in a predetermined range in a plane are arranged. A combination of patterns, a pattern that changes the thickness of the ruled lines arranged vertically and horizontally, and a combination of the sizes of the overlapping parts of the ruled lines within a predetermined range, and the values of x and y coordinates are directly dot In particular, a simple and suitable one is to set reference points that are evenly spaced in the vertical and horizontal directions, and to place dots that are displaced vertically and horizontally with respect to this reference point. In addition, a method using the relative positional relationship of these dots from the reference point can be used. This method is advantageous in increasing the resolution of the input device because the dot size can be made small and constant.

  The dot shape of the dot pattern is not particularly limited as long as it can be easily distinguished from the adjacent dots. Usually, the shape in plan view is a circle, an ellipse, a polygon, or the like. Further, there is no particular limitation on the three-dimensional shape of the dot, and examples thereof include a substantially disk shape, a hemispherical shape, a concave shape, and a polygonal shape.

  Next, in the pattern printing sheet of the present invention, the primer layer 4 is provided in order to improve the protection of the patterned printing layer 3 and the adhesion between the surface protection layer and the lower layer. By improving the adhesion, even when a water-based ink or a one-component curable ink with poor substrate adhesion is used for the dot pattern, it is possible to prevent the dots from peeling off due to surface friction.

The resin composition constituting the primer layer 4 is not particularly limited, but a colorless or translucent milky white two-component curable resin is desirable from the viewpoint of improving the above-mentioned adhesion and the dot readability as a final product. In particular, a two-component curable urethane resin is preferable.
The two-component curable urethane resin is a urethane resin having a polyol as a main component and a polyisocyanate as a cross-linking agent (curing agent). As the polyol, a compound having two or more hydroxyl groups in the molecule, such as polyethylene glycol and polypropylene. Glycol, acrylic polyol, polyester polyol, polyether polyol, polycarbonate polyol, polyurethane polyol and the like are used. The polyisocyanate is a compound having two or more isocyanate groups in the molecule, for example, an aromatic isocyanate such as 2,4-tolylene diisocyanate, xylene diisocyanate, naphthalene diisocyanate, 4,4′-diphenylmethane diisocyanate, or Aliphatic (or alicyclic) isocyanates such as 1,6-hexamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated diphenylmethane diisocyanate are used. Alternatively, as the polyisocyanate, an adduct or a multimer of the above-mentioned various polyisocyanates, for example, an adduct of tolylene diisocyanate, a tolylene diisocyanate trimer, or the like can be used.

In addition, a weather resistance improver that improves weather resistance can be added to the primer layer 4 for the purpose of preventing discoloration of the sheet over time, as long as the sheet performance described later is not impaired. As the agent, an ultraviolet absorber or a light stabilizer can be used. The ultraviolet absorber may be either inorganic or organic, and as the inorganic ultraviolet absorber, titanium dioxide, cerium oxide, zinc oxide or the like having an average particle diameter of about 5 to 120 nm can be preferably used. Examples of the organic ultraviolet absorber include benzotriazole-based compounds, specifically 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2- (2-hydroxy-3,5-di-tert-). Amylphenyl) benzotriazole, 3- [3- (benzotriazol-2-yl) -5-tert-butyl-4-hydroxyphenyl] propionic acid ester of polyethylene glycol, and the like. On the other hand, examples of the light stabilizer include hindered amines, specifically 2- (3,5-di-tert-butyl-4-hydroxybenzyl) -2′-n-butylmalonate bis (1,2,2). , 6,6-pentamethyl-4-piperidyl), bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, tetrakis (2,2,6,6-tetramethyl-4-piperidyl)- 1,2,3,4-butanetetracarboxylate and the like.
The compounding amount of the weather resistance improving agent is about 1 to 50% by mass, preferably 3 to 40% by mass, and more preferably 5 to 25% by mass based on the total amount of the resin composition forming the primer layer 4.

Although there is no restriction | limiting in particular about the thickness of the primer layer 4, The range of 1-10 micrometers is preferable. If it is 1 μm or more, it is advantageous in terms of protecting the printed layer 3 against surface abrasion, and if it is 10 μm or less, it depends on the concealing action of the inorganic additive contained in the primer layer and the refractive index of the resin constituting the primer layer. An adverse effect on the dot pattern can be suppressed, and recognition of the position information by the electronic pen is not impaired. From the above viewpoint, the thickness of the primer layer 3 is more preferably in the range of 1 to 5 μm.
Moreover, there is no restriction | limiting in particular as the coating method of the primer layer 4, Well-known systems, such as a gravure coat, a bar coat, a roll coat, a reverse roll coat, a comma coat, can be used.

Next, the surface protective layer 5 is configured by curing a curable resin composition containing a filler. Examples of the curable resin composition include a thermosetting resin composition and an ionizing radiation curable resin composition, and an ionizing radiation curable resin composition, particularly an electron beam curable resin composition is preferable.
Thermosetting resins include phenolic resins, phenol-formalin resins, urea resins, urea-formalin resins, melamine resins, melamine-formalin resins, alkyd resins, epoxy resins, unsaturated polyester resins, and general-purpose two-component curable acrylic resins. (Acrylic polyol hardened | cured material) etc. can be illustrated.

The ionizing radiation curable resin refers to a resin having an energy quantum capable of crosslinking and polymerizing molecules in an electromagnetic wave or a charged particle beam, that is, a resin that is crosslinked and cured by irradiation with ultraviolet rays or electron beams. Specifically, it can be appropriately selected from polymerizable monomers, polymerizable oligomers, or prepolymers conventionally used as ionizing radiation curable resins.
Typically, a (meth) acrylate monomer having a radical polymerizable unsaturated group in the molecule is suitable as the polymerizable monomer, and among them, a polyfunctional (meth) acrylate is preferable. Here, “(meth) acrylate” means “acrylate or methacrylate”. The polyfunctional (meth) acrylate is not particularly limited as long as it is a (meth) acrylate having two or more ethylenically unsaturated bonds in the molecule. Specifically, ethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) ) Acrylate, polyethylene glycol di (meth) acrylate, hydroxypivalate neopentyl glycol di (meth) acrylate, dicyclopentanyl di (meth) acrylate, caprolactone modified dicyclopentenyl di (meth) acrylate, ethylene oxide modified diphosphate ( (Meth) acrylate, allylated cyclohexyl di (meth) acrylate, isocyanurate di (meth) acrylate, trimethylolpropane tri (meth) acrylate, ethylene oxide modified trimethylo Propane tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified dipentaerythritol tri (meth) acrylate, pentaerythritol tri (meth) acrylate, propylene oxide modified trimethylolpropane tri (meth) acrylate, tris ( Acryloxyethyl) isocyanurate, propionic acid modified dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, ethylene oxide modified dipentaerythritol hexa (meth) acrylate, caprolactone modified dipentaerythritol hexa (meth) acrylate, etc. Is mentioned. These polyfunctional (meth) acrylates may be used singly or in combination of two or more.

  In the present invention, a monofunctional (meth) acrylate can be used in combination with the polyfunctional (meth) acrylate as long as the object of the present invention is not impaired, for the purpose of lowering the viscosity. Examples of monofunctional (meth) acrylates include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, cyclohexyl ( Examples include meth) acrylate, 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, and isobornyl (meth) acrylate. These monofunctional (meth) acrylates may be used alone or in combination of two or more.

  Next, as the polymerizable oligomer, an oligomer having a radical polymerizable unsaturated group in the molecule, for example, epoxy (meth) acrylate, urethane (meth) acrylate, polyester (meth) acrylate, polyether (meth) acrylate The system etc. are mentioned. Here, the epoxy (meth) acrylate oligomer can be obtained, for example, by reacting (meth) acrylic acid with an oxirane ring of a relatively low molecular weight bisphenol type epoxy resin or novolak type epoxy resin and esterifying it. . Further, a carboxyl-modified epoxy (meth) acrylate oligomer obtained by partially modifying this epoxy (meth) acrylate oligomer with a dibasic carboxylic acid anhydride can also be used. The urethane (meth) acrylate oligomer can be obtained, for example, by esterifying a polyurethane oligomer obtained by reaction of polyether polyol or polyester polyol and polyisocyanate with (meth) acrylic acid. Examples of polyester (meth) acrylate oligomers include esterification of hydroxyl groups of polyester oligomers having hydroxyl groups at both ends obtained by condensation of polycarboxylic acid and polyhydric alcohol with (meth) acrylic acid, It can be obtained by esterifying the terminal hydroxyl group of an oligomer obtained by adding an alkylene oxide to a carboxylic acid with (meth) acrylic acid. The polyether (meth) acrylate oligomer can be obtained by esterifying the hydroxyl group of the polyether polyol with (meth) acrylic acid.

  Furthermore, other polymerizable oligomers include polybutadiene (meth) acrylate oligomers with high hydrophobicity that have (meth) acrylate groups in the side chain of polybutadiene oligomers, and silicone (meth) acrylate oligomers that have polysiloxane bonds in the main chain. In a molecule such as an aminoplast resin (meth) acrylate oligomer modified with an aminoplast resin having many reactive groups in a small molecule, or a novolak epoxy resin, bisphenol epoxy resin, aliphatic vinyl ether, aromatic vinyl ether, etc. There are oligomers having a cationic polymerizable functional group.

When an ultraviolet curable resin composition is used as the ionizing radiation curable resin composition, it is desirable to add about 0.1 to 5 parts by mass of the photopolymerization initiator with respect to 100 parts by mass of the resin composition. The initiator for photopolymerization can be appropriately selected from those conventionally used and is not particularly limited. For example, for a polymerizable monomer or polymerizable oligomer having a radically polymerizable unsaturated group in the molecule. Benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin-n-butyl ether, benzoin isobutyl ether, acetophenone, dimethylaminoacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2 -Phenylacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholino-propane-1 - 4- (2-hydroxyethoxy) phenyl-2 (hydroxy-2-propyl) ketone, benzophenone, p-phenylbenzophenone, 4,4′-diethylaminobenzophenone, dichlorobenzophenone, 2-methylanthraquinone, 2-ethylanthraquinone, 2 -Tertiary butylanthraquinone, 2-aminoanthraquinone, 2-methylthioxanthone, 2-ethylthioxanthone, 2-chlorothioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, benzyldimethyl ketal, acetophenone dimethyl ketal It is done.
Examples of the polymerizable oligomer having a cationic polymerizable functional group in the molecule include aromatic sulfonium salts, aromatic diazonium salts, aromatic iodonium salts, metallocene compounds, and benzoin sulfonic acid esters.
Moreover, as a photosensitizer, p-dimethylbenzoic acid ester, tertiary amines, a thiol type sensitizer, etc. can be used, for example.
In the present invention, it is preferable to use an electron beam curable resin composition as the ionizing radiation curable resin composition. This is because the electron beam curable resin composition can be made solvent-free, is more preferable from the viewpoint of environment and health, and does not require a photopolymerization initiator and can provide stable curing characteristics.

The curable resin composition in the present invention is characterized by containing a filler. The material and content of the filler are determined in relation to the base material used, the resin composition constituting the primer layer, and the like, and the 60 ° gloss value of the surface of the pattern printing sheet of the present invention is 8 to 20. Selected to be in range.
The filler material is not particularly limited as long as the 60 degree gloss value is satisfied, and either an inorganic filler or an organic filler can be used.

Examples of inorganic fillers include calcium carbonate, magnesium carbonate, fly ash, dehydrated sludge, natural silica, synthetic silica, kaolin, clay, calcium oxide, magnesium oxide, titanium oxide, zinc oxide, barium sulfate, calcium hydroxide, and hydroxide. Aluminum, alumina, magnesium hydroxide, talc, mica, hydrotalcite, aluminum silicate, magnesium silicate, calcium silicate, calcined talc, wollastonite, potassium titanate, magnesium sulfate, calcium sulfate, magnesium phosphate, sepiolite, zonolite, Magnetic powder such as aluminum borate, silica balloon, glass flake, glass balloon, silica, steel slag, copper, iron, iron oxide, carbon black, sendust, alnico magnet, various ferrites, cement , Glass powder, diatomaceous earth, antimony trioxide, magnesium oxysulfate, hydrated aluminum, hydrated gypsum, alum, and the like.
In addition, these inorganic fillers may be used independently and 2 or more types may be used together.

Organic fillers include polyolefin resins such as polyethylene and polypropylene; fluorine resins; styrene resins; epoxy resins; melamine resins; urea resins; acrylic resins; phenol resins; Polyester resin etc. are mentioned, The copolymer of the said resin can also be used. Among these, from the viewpoint of the performance as a whiteboard, more specifically, from the viewpoint of preventing dyeing contamination of the filler by the marker when writing and erasing, an organic filler formed of urea resin is preferable. is there.
Moreover, what has the chemical composition which has the reactive group in curable resin from a viewpoint of stability of the filler after hardening of curable resin is desirable.
Furthermore, from the viewpoint of sufficiently obtaining a function as a projection screen, the organic filler is preferably an amorphous filler, and preferably has a sufficient oil absorption.
In addition, these organic fillers may be used independently and 2 or more types may be used together.

As described above, the content of the filler in the curable resin composition is selected so that the 60-degree gloss value of the surface of the pattern printing sheet is in the range of 8 to 20, and the optimum range depends on the material used. Different. Usually, the 60-degree gloss value tends to decrease as the filler content increases, and to increase as the filler content decreases.
As a more specific preferred range, it is usually in the range of 1 to 50 parts by mass with respect to 100 parts by mass of the curable resin, and particularly in the case of an organic filler, with respect to 100 parts by mass of the curable resin, The range of 10-18 mass parts is preferable, and in the case of an inorganic filler, the range of 5-30 mass parts is preferable.
On the other hand, as a method for reducing the gloss of the surface of the pattern printing sheet, there is also a method in which a transparent or semi-transparent substrate 2 is used and the adhesive layer 6 and the bonding substrate 7 are laminated in this order on the back surface side. Preferably used. In that case, according to the gloss of the bonding substrate 7, the filler content in the surface protective layer 5 can be adjusted. For example, if the bonding substrate 7 has a 60-degree gloss value of 4, Even when the surface protective layer 5 is provided using a curable resin composition containing 9 to 18 parts by mass of an organic filler with respect to 100 parts by mass of the curable resin, the surface of the pattern printed sheet has a 60 ° gloss. Can be in the range of 8 to 20, which is preferable because the content of the filler can be reduced while maintaining a suitable function as a projection screen, and the remaining marker can be reduced when the marker is erased by the eraser.

  Further, the average particle size of the filler is also selected so that the 60 degree gloss value of the surface of the pattern printing sheet is in the range of 8 to 20, but is usually preferably in the range of 0.5 to 10 μm. . When the average particle size is 0.5 μm or more, a sufficient matting effect of the surface protective layer can be obtained, and a sufficient function as a projection screen can be exhibited. On the other hand, when the surface protection layer is 10 μm or less, the surface unevenness when the surface protective layer is formed can be smoothed, so that the whiteboard marker can be written smoothly and the marker remaining can be prevented when the marker is erased by the eraser. From the above viewpoint, the average particle size of the filler is more preferably in the range of 1 to 7 μm.

The adhesive layer 6 is a layer provided between the base material 2 and the bonding base material 7 when the bonding base material 7 is provided on the back surface side of the base material 2.
The adhesive used in the adhesive layer 6 can be appropriately selected from known or commercially available adhesives according to the components constituting the substrate 2 and the bonding substrate 7. Examples thereof include thermosetting resins such as polyester resins, polyurethane resins, polyester urethane resins, and epoxy resins, in addition to polyolefin resins such as polyethylene and polypropylene. These resins may be used in the state of an emulsion. Of these, urethane resin adhesives are preferred from the viewpoint of heat resistance. As the urethane resin adhesive, a two-component curable urethane resin having a polyol as a main component and an isocyanate as a crosslinking agent (curing agent) is preferably exemplified.

What is necessary is just to implement according to a well-known method as an adhesion | attachment method according to the kind etc. of adhesive to be used. For example, polymerization of polyester resins, polyurethane resins, polyester urethane resins, epoxy resins and other thermosetting resins such as isocyanates, amines and other crosslinking agents, methyl ethyl ketone peroxide, hydroperoxide, azabisisobutyronitrile, etc. A method of applying an adhesive to which an initiator, a polymerization accelerator such as cobalt naphthenate, dimethylaniline and the like are added if necessary, and then dry laminating can be employed. Moreover, in this invention, the adhesive agent which can be thermocompression bonded is used, and the base material 2 and the bonding base material 7 can also be laminated | stacked by thermocompression bonding.
The thickness of the adhesive layer 6 varies depending on the type of adhesive used, but is usually about 0.1 to 30 μm.

The bonding base material 7 is bonded to the back surface side of the base material 2 as shown in FIG.
As the pasting base material 7, a 60-degree gloss value of the surface on the base material 2 side is preferably 7 or less, more preferably 5 or less. In that case, as described above, the surface protective layer 5 Even when the filler content is relatively small, the 60-degree gloss value of the surface of the entire pattern print sheet can be in the range of 8-20.

As the bonding base material 7, the same material as the base material 2 can be used.
Moreover, the pasting base material 7 may be colored by containing a coloring agent. As a coloring agent used for the bonding base material 7, if an input terminal can recognize the contrast with the pattern formation part of the printing layer 3, and the bonding base material 7, it will not specifically limit, For example, calcium carbonate , Titanium oxide, mica, talc, antimony white, yellow iron oxide, yellow lead, titanium yellow, dial, chrome vermilion, cadmium yellow, cadmium red, ferrocyanide, ultramarine, cobalt blue and other inorganic pigments, quinacridone red, Organic pigments or dyes such as isoindolinone yellow, phthalocyanine blue, phthalocyanine green, metallic pigments composed of scaly foils such as aluminum and brass, pearl luster composed of scaly foils such as titanium dioxide-coated mica and basic lead carbonate (Pearl) pigments can be used according to the wavelength read by the input terminal. Calcium carbonate, titanium oxide, mica, those white talc preferred.

Moreover, the pattern printing sheet of this invention can also have arbitrary patterns by providing a pattern layer (not shown) further.
When the pattern layer is provided between the printing layer 3 and the primer layer 4, between the base material 2 and the adhesive layer 6, between the adhesive layer 6 and the bonding base material 7, etc., when forming the printing layer 3 Furthermore, it is preferable because the pattern reproducibility is not impaired.
As a specific method of forming the pattern layer, various patterns are printed on one or more places on the printing layer 3, the back surface of the base material 2, and the bonding base material 7 using ink and a printing machine. The method of doing is mentioned.

  The colorant used for forming the pattern layer is not particularly limited as long as the input terminal can recognize the contrast between the pattern forming portion of the printing layer 3 and the bonding substrate 7, for example, titanium white, Antimony white, yellow iron oxide, yellow lead, titanium yellow, petal, chrome vermilion, cadmium yellow, cadmium red, ferrocyanide, ultramarine, cobalt blue and other inorganic pigments, quinacridone red, isoindolinone yellow, phthalocyanine blue, Input from organic pigments or dyes such as phthalocyanine green, metallic pigments composed of scaly foils such as aluminum and brass, pearlescent pigments composed of scaly foils such as titanium dioxide-coated mica and basic lead carbonate, etc. Select according to the detection light of the terminal, the colorant forming the printed layer 3, the colorant contained in the base material 2 or the bonding base material 7, and the like. Can.

  From the viewpoint of securing the function as a projection screen, the pattern printed sheet of the present invention must have a surface gloss level of 8 to 20 as a 60-degree gloss value. When a higher function is required as a projection screen, the 60 degree gloss value is more preferably in the range of 11-15.

  The pattern printed sheet of the present invention preferably has a surface pencil hardness of 2B or more. When the pencil hardness is 2B or more, good scratch resistance is obtained, and at the same time, a dent due to writing pressure is difficult when writing with a pen tip such as a hard electronic pen whose input terminal is hard. From the above viewpoint, the pencil hardness is more preferably B or more.

The input terminal that can be used in the present invention is not particularly limited as long as it can recognize the contrast between the pattern forming portion and the non-pattern forming portion of the printed layer 3, and may be provided with a conventionally known sensor. That's fine.
Position information is calculated from continuous imaging data read by the input terminal, and is combined with time information to be provided as input trajectory data that can be handled by the information processing apparatus. Note that these processing devices are not particularly limited as long as they include members such as a processor, a memory, a communication interface, and a battery.
Further, the read data processing device may be built in the input terminal or may be built in an external information processing device.

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by these examples.
(Evaluation method)
(1) Sheet surface performance (surface gloss)
About the pattern printing sheet manufactured in each Example and the comparative example, the glossiness of the surface was measured on the conditions of incident light 60 degree | times using the gloss meter ("micro-TRI-gloss" by Gardner) (60 degree glossiness). value).
(2) Projector projection test For the pattern printing sheets produced in each of the examples and comparative examples, with the sheet laminated on the vertical surface without wrinkles, the projector used “LV7365 made by CANON”, hot spots, glare of light The presence or absence of color dullness was visually confirmed, and each evaluation was performed according to the following evaluation criteria.
(2-1) Hot spot ◎: Projection light is very blurred and no glare is felt ○: Projector irradiation light is blurry and no glare x: Projector Irradiation light is confirmed as circular light, and glare is felt (2-2) Color glare ◎: When red, yellow, and blue light is projected, the color as the primary color is reproduced ○: Good color reproducibility when projecting red, yellow, and blue light. Δ: When projecting red, yellow, and blue light, the color tone on the projection screen becomes slightly metallic. ×: Red When projecting light of yellow, blue, the color tone on the projection screen becomes metallic (2-3) Dullness of color ◎; When projecting white light, the color tone as the primary color is reproduced Things ○: When white light is projected, color reproducibility is good ×: When the white light is projected, the color tone on the projection screen turns gray

(3) Whiteboard performance (marker erasability)
About the pattern printing sheet manufactured in each Example and Comparative Example, after writing with a white board marker manufactured by Pentel Co., Ltd. and drying for 1 minute at room temperature, the surface was 1 with a load of 500 g using a melamine foam eraser made of OHTO. The appearance after reciprocating erase was evaluated according to the following criteria.
◎; Marker residue does not remain and marker can be wiped off easily ○: Marker residue does not remain and marker can be wiped off △; Marker residue adheres to the surface and the marker is removed by two or more reciprocations Can be wiped off

(4) Dot pattern reading performance Using the Anoto pattern detector “TECHKON APA DMS910IR” and the dedicated software “Anoto Pattern Analyzer” for the pattern printing sheets manufactured in each example and comparative example, the dot pattern can be read. I checked if it could be done.
○: The dot pattern could be read x; The dot pattern could not be read (5) Pencil hardness Pencil hardness in accordance with JIS-K-5600-5-4 for the coated surface of the electron beam curable resin A test was conducted. The hardness of the pencil to be used was 3H to 2B, and the evaluation was performed with the maximum pencil hardness that does not cause scratches, bites, or the like on the sheet surface.
(6) Abrasion resistance A tester industry Co., Ltd. Gakushin type friction tester is used as a tester, an OHTO melamine eraser is used as a base material for wear, and a load of 4 kg is applied to the surface of the surface protective layer. The appearance change when the 500 reciprocating sliding test was performed was evaluated according to the following criteria.
○: No change in appearance ×: Dropping of the dot part due to peeling of the electron beam curable resin

Example 1
Aqueous acrylic resin ("Ode KR991 ink" manufactured by Inktec Co., Ltd.) and "Ode mixer" at a mass ratio of 90:10 on the surface of a white PET film ("U2 L92W" manufactured by Teijin DuPont Films, Inc.) having a thickness of 125 μm Anoto pattern was printed by a flexographic printing method, and a patterned printing layer having regularity was laminated. Next, an acrylic polyol resin (“EBF primer” manufactured by Showa Ink Industry Co., Ltd.) was applied at a coating amount of 2.0 g / m ² by a gravure coater method, and a primer layer was laminated.
Next, an electron beam curable resin mainly composed of an electron beam curable acrylate resin and a polyfunctional monomer ("Ink Tech Co., Ltd.""WBW Hard (average functional group number 4.0) 100 parts by mass, An electron beam curable resin composition comprising 3 parts by mass of a silicone acrylate prepolymer (The Inktec Co., Ltd., “WBW silicone additive”) and 18 parts by mass of an organic filler composed of a urea resin having an average particle size of 5 μm. By a gravure direct coater method, coating was carried out at 2.0 g / m ² and a surface protective layer (uncured) was laminated, and after coating, an electron beam with an acceleration voltage of 165 kV and an irradiation dose of 50 kGy (5 Mrad) was irradiated. The electron beam curable resin composition was cured to form a surface protective layer, and a pattern printing sheet was produced.
The results of evaluating the sheet by the above method are shown in Table 1.

Examples 2 to 4 and Comparative Examples 1 to 3
In Example 1, a pattern printed sheet was produced in the same manner as in Example 1 except that the content of the organic filler was changed as shown in Table 1. The results of evaluation in the same manner as in Example 1 are shown in Table 1.

Example 5
In Example 1, a pattern printing sheet was produced in the same manner as in Example 1 except that instead of the organic filler, surface-treated silica (average particle size: 5 μm), which was an inorganic filler, was used. The results of evaluation in the same manner as in Example 1 are shown in Table 1.

Example 6
In Example 1, a pattern printing sheet was produced in the same manner as in Example 1 except that surface untreated silica (average particle size: 5 μm), which was an inorganic filler, was used instead of the organic filler. The results of evaluation in the same manner as in Example 1 are shown in Table 1.

Example 7
In Example 1, a pattern printing sheet was produced in the same manner as in Example 1 except that surface untreated silica (average particle size 7.5 μm), which was an inorganic filler, was used instead of the organic filler. The results of evaluation in the same manner as in Example 1 are shown in Table 1.

Example 8
In Example 1, a pattern printed sheet was prepared in the same manner as in Example 1 except that a 50 μm white PET film (“SW84G” manufactured by SKC Co., Ltd.) was used as the white PET film used as the substrate. The results evaluated in the same manner as in Example 1 are shown in Table 1.

Example 9
In Example 1, a pattern printed sheet was produced in the same manner as in Example 1 except that a white polypropylene film (PP, “PB023 W23” manufactured by Mitsubishi Plastics, Inc.) having a thickness of 60 μm was used as the base material. The results of evaluation in the same manner as in Example 1 are shown in Table 1.

Example 10
In Example 1, a pattern printed sheet was produced in the same manner as in Example 1 except that a white polypropylene film having a thickness of 140 μm (PP, “PB020 W22” manufactured by Mitsubishi Plastics, Inc.) was used as the base material. The results of evaluation in the same manner as in Example 1 are shown in Table 1.

Comparative Example 4
In Example 1, a pattern printing sheet was produced in the same manner as in Example 1 except that the urea filler content was 16 parts by mass and the primer layer was not laminated. The results of evaluation in the same manner as in Example 1 are shown in Table 1.

Example 11
Aqueous acrylic resin ("Ode KR991 ink" manufactured by Inktec Co., Ltd.) and "Ode mixer" are mixed at a mass ratio of 90:10 on the surface of a 125 [mu] m transparent PET film ("Cosmo Shine A4300" manufactured by Toyobo Co., Ltd.) The Anoto pattern was printed by a flexographic printing method, and a patterned printing layer having regularity was laminated. Next, an acrylic polyol resin (“EBF primer” manufactured by Showa Ink Industry Co., Ltd.) was applied at a coating amount of 2.0 g / m ² by a gravure coater method, and a primer layer was laminated.
Next, with respect to 100 parts by mass of an electron beam curable resin having an electron beam curable acrylate resin and a polyfunctional monomer as main components ("WBW hard (average functional group number: 4.0)" manufactured by The Inktec Co., Ltd. An electron beam curable resin composition in which 3 parts by mass of a silicone acrylate prepolymer (The Inktec Co., Ltd., “WBW silicone additive”) and 12 parts by mass of an organic filler composed of a urea resin having an average particle size of 5 μm are added. By a gravure direct coater method, coating was carried out at 2.0 g / m ² and a surface protective layer (uncured) was laminated, and after coating, an electron beam with an acceleration voltage of 165 kV and an irradiation dose of 50 kGy (5 Mrad) was irradiated. The electron beam curable resin composition was cured to form a surface protective layer.
A laminate of the transparent PET film / printing layer / primer layer / surface protective layer obtained as described above was made of a polypropylene film having a thickness of 60 μm (“PB-013” (trade name) manufactured by Mitsubishi Chemical MKV Co., Ltd.). When the gloss of the surface of the laminate was measured by the above method by placing on a low gloss surface (60 ° gloss value = 4), the 60 ° gloss value was 24.
Next, a polypropylene film (Mitsubishi Chemical MKV (Mitsubishi Chemical MKV) having a thickness of 60 μm is placed on the back surface of the laminate through a polyester urethane resin (“E-295L” manufactured by Dainichi Seika Kogyo Co., Ltd.) (trade name). A low-gloss surface (60 ° gloss value = 4) of “PB-013” (trade name), manufactured by Co., Ltd., was attached to prepare a pattern printing sheet.
The results of evaluation in the same manner as in Example 1 are shown in Table 2.

Example 12
In Example 11, the glossy surface (60 ° gloss value = 7) of a 60 μm thick polypropylene film (“PB-013” (trade name) manufactured by Mitsubishi Chemical MKV Co., Ltd.) bonded to the back surface of the pattern printing sheet. A pattern printing sheet was produced in the same manner as in Example 11 except that. The results of evaluation in the same manner as in Example 1 are shown in Table 2.
Further, the gloss of the laminate surface of the transparent PET film / printing layer / primer layer / surface protective layer was measured in the same manner as in Example 11, and the 60 ° gloss value was 24.

Example 13
In Example 11, a pattern printed sheet was produced in the same manner as in Example 11 except that the content of the organic filler was changed as shown in Table 2. The results of evaluation in the same manner as in Example 1 are shown in Table 2.
Further, in the same manner as in Example 11, the gloss of the laminate surface of the transparent PET film / printing layer / primer layer / surface protective layer was measured, and the 60 ° gloss value was 14.

Example 14
In Example 11, a pattern printed sheet was produced in the same manner as in Example 11 except that the content of the organic filler was changed as shown in Table 2. The results of evaluation in the same manner as in Example 1 are shown in Table 2.
Moreover, when the gloss of the laminated body surface of transparent PET film / printing layer / primer layer / surface protective layer was measured in the same manner as in Example 11, the 60 ° gloss value was 37.

Example 15
In Example 3, as the primer layer 4, 7% by mass of triazine-based UV absorber (4% by mass of Tinuvin 479 and 3% by mass of Tinuvin 400 manufactured by Ciba Japan) and benzotriazole-based UV absorber (Ciba A pattern printing sheet was prepared in the same manner as in Example 3 except that a product manufactured by Japan and trade name Tinuvin 123) 2% by mass (“SG-3” manufactured by DIC Graphics Co., Ltd.)) was used. The results evaluated in the same manner as in Example 1 are shown in Table 2.
Further, when the weather resistance test shown below was performed, the sheet was hardly discolored (ΔE = 3 or less).
(Weather resistance test)
Using a UV auto fade meter U48AU manufactured by Suga Test Instruments Co., Ltd., the sheet surface was subjected to accelerated wrinkle resistance deterioration treatment for 24 hours, and then the color of the sheet was measured with a color difference meter (Spectrophotometer CM3700d manufactured by Minolta). confirmed.

According to the pattern printing sheet of the present invention, it has a function as a projection screen capable of projecting character data, image data, etc. through a projector or the like, and writing can be performed on the screen in real time. Thus, it is possible to obtain a projection screen that has a function that can be captured as digital information and reflected on the projection screen, and that can also be used as a whiteboard.
Furthermore, a plastic film, a wooden plywood, a steel plate, a magnet sheet, and an adsorption sheet can be bonded to the back surface of the pattern printing sheet of the present invention. By combining with equipment such as plastic film, wooden plywood and steel plate, it can be used as a part of conventional building materials such as mobile whiteboards, partitions and wall surfaces.
In addition, when magnetic sheets and suction sheets are bonded together, it is possible to give the performance as described above to the blackboard and wall that have already been installed. It can be carried and used without being restricted by space restrictions.
Furthermore, the pattern printing sheet of the present invention can be used as a projection and whiteboard sheet without being used as an electronic pen.

1: Pattern printing sheet 2: Base material 3: Print layer 4: Primer layer 5: Surface protective layer 6: Adhesive layer 7: Bonding base material

Claims (6)

A pattern printing sheet obtained by laminating a patterned printing layer having regularity, a primer layer, and a surface protective layer in this order on a substrate, and the ink constituting the printing layer contains a colorant, and the printing The layer can provide information on the position of the input terminal on the pattern printing sheet by reading the pattern from the surface protective layer side using an input terminal capable of detecting the pattern, and the surface protective layer contains a filler. A pattern printed sheet obtained by curing a curable resin composition to be cured, wherein the filler is made of a urea resin and has a 60 ° gloss value of 8 to 20.   The pattern printing sheet according to claim 1, wherein the surface protective layer is obtained by crosslinking and curing an ionizing radiation curable resin composition. The pattern printing sheet according to claim 1 or 2, wherein the filler content is 10 to 18 parts by mass with respect to 100 parts by mass of the curable resin. The thickness of the substrate, pattern printing sheet according to any one of claims 1 to 3 25～400Myuemu. The pattern printing sheet according to any one of claims 1 to 4 , wherein an adhesive layer and a bonding base material are further laminated in this order on the back surface side of the base material. Multifunctional projection screen using a pattern printing sheet according to any of claims 1 to 5.

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