JP2018094742A - Method and apparatus for producing adsorption sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing an adsorption sheet having an adsorption surface using a recess shape which can form a recess that is excellent in productivity and has a uniform size and can form an adsorption surface at an arbitrary position of a base material.SOLUTION: A method for producing an adsorption sheet includes injecting ink for adsorption surface formation containing at least water, resin fine particles and a surface active agent from an inkjet head to a base material, where when a contact angle of the ink for adsorption surface formation at 25°C with respect to the base material is represented by C25 and a contact angle of the ink for adsorption surface formation at 65°C with respect to the base material is represented by C65, a relationship of 0.8≤C65/C25≤1.2 is satisfied. In the method for producing the adsorption sheet, the surface active agent is preferably an acrylic surface active agent or a polyoxyethylene alkyl ether-based surface active agent. An adsorption sheet preferably contains 5 or more and less than 20 mass% of the fine particles having a glass transition temperature of 60°C.SELECTED DRAWING: None

Description

  The present invention relates to an adsorption sheet manufacturing method and an adsorption sheet manufacturing apparatus.

  Conventionally, a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer on the back surface is generally used for a printing sheet used for an advertising poster, a sales promotion POP, or the like. However, the pressure-sensitive adhesive sheet provided with the pressure-sensitive adhesive layer has a drawback that air is likely to be mixed and wrinkles are likely to occur when the adhesive sheet is applied to a particularly smooth surface. The mixing of air can be prevented by the use of a squeegee or the like, but the use of the squeegee or the like complicates the affixing operation, and the use of the squeegee or the like may damage the image surface. In addition, many pressure-sensitive adhesive sheets having a pressure-sensitive adhesive layer are not easy to peel off, and therefore many are not easy to reattach.

  As printing sheets free from such drawbacks, Patent Documents 1 and 2 disclose suction sheets having a suction surface having a large number of fine recessed and recessed holes. The concave depression hole on the suction surface functions as a micro suction cup, and can be attached to an adherend without using an adhesive. For this reason, the adhering sheets described in Patent Documents 1 and 2 are easily pasted, and therefore, air mixing and wrinkle generation are unlikely to occur. Moreover, since it can be easily peeled off, it can be easily attached again, and can be reused.

JP 2001-356724 A JP 2002-348548 A

  In the techniques disclosed in Patent Documents 1 and 2, the suction surface of the suction sheet having a large number of fine recessed and recessed holes is mixed with fine bubbles in the acrylic resin emulsion, and this is removed with a comma coater. It is formed by coating on paper and drying. As a result of intensive studies by the present inventors, the techniques disclosed in Patent Documents 1 and 2 are inferior in productivity because it is difficult to stably encapsulate fine bubbles in an acrylic resin emulsion over a long period of time. I found that there is a problem. Further, the present inventors have found that the size of the recessed depression hole formed after coating tends to be non-uniform so that the adsorption force varies. Furthermore, it has been found that the techniques disclosed in Patent Documents 1 and 2 have a problem that it is difficult to form an adsorption surface at an arbitrary position of the substrate.

  Therefore, the present invention is a method of manufacturing an adsorbent sheet having an adsorbing surface using a concave shape, which is excellent in productivity, can form a concave portion having a uniform size, and is adsorbed at an arbitrary position on a substrate. It aims at providing the manufacturing method which can form a surface.

  The present invention includes discharging an adsorption surface forming ink containing at least water, resin fine particles, and a surfactant from an inkjet head onto a substrate, and the substrate of the adsorption surface forming ink at 25 ° C. Adsorption is characterized in that 0.8 ≦ C65 / C25 ≦ 1.2 is satisfied, where C25 is a contact angle with respect to the substrate and C65 is a contact angle with respect to the substrate of the ink for forming the adsorption surface at 65 ° C. It is a manufacturing method of a sheet.

  The present invention provides a transport unit that transports a base material, a discharge unit that includes an inkjet head that discharges suction surface forming ink to the base material, and the suction surface forming ink connected to the discharge unit. The suction surface forming ink contains at least water, resin fine particles, and a surfactant, and a contact angle of the suction surface forming ink at 25 ° C. with respect to the substrate. The suction sheet manufacturing apparatus satisfying 0.8 ≦ C65 / C25 ≦ 1.2 when the contact angle of the ink for forming the suction surface at C25 and 65 ° C. with respect to the substrate is C65. It is.

  According to the present invention, a concave portion having a uniform size can be formed by forming a large number of concave projections functioning as suction cups on a substrate by an ink jet method. Moreover, since the adsorption | suction surface comprised from a concave-shaped protrusion can be formed easily, it is excellent in productivity of an adsorption | suction sheet. Furthermore, an adsorption surface can be formed at an arbitrary position of the substrate.

It is a conceptual diagram of one Embodiment of the manufacturing apparatus of the adsorption sheet of this invention.

  The present invention includes discharging an adsorption surface forming ink containing at least water, resin fine particles, and a surfactant from an inkjet head onto a substrate, and the substrate of the adsorption surface forming ink at 25 ° C. Suction is characterized in that 0.8 ≦ C65 / C25 ≦ 1.2 is satisfied, where C25 is the contact angle with respect to the substrate, and C65 is the contact angle with respect to the substrate of the ink for forming the suction surface at 65 ° C. It is a manufacturing method of a sheet.

  By ejecting such suction surface forming ink from the inkjet head, the suction surface forming ink ejected in the form of droplets forms concave protrusions on the substrate. The concave projection is elastically deformed by pressing, and when the pressing is released, the concave projection tends to return to the original shape from the deformed state. Therefore, the concave protrusion acts as a suction cup, and the surface to which the suction surface forming ink is applied functions as the suction surface. The mechanism by which the concave protrusion is formed is not clear, but is estimated as follows. When the ink for forming an adsorption surface containing at least water, resin fine particles, and a surfactant is ejected from the ink jet head and drops on the substrate, vaporization of the solvent will start soon. At this time, vaporization is more active at the edge of the ink droplet than at the center, and the viscosity is relatively high. For this reason, the resin that moves around in the ink droplets by convection collects at the ends having high viscosity. Here, in the suction surface forming ink used in the present invention, the ratio of the contact angle C65 to the substrate at 65 ° C. and the contact angle C25 to the substrate at 25 ° C. is 0.8 or more and 1.2 or less, The difference between the contact angle C65 for the substrate at 65 ° C. and the contact angle C25 for the substrate at 25 ° C. is small. As a result, the edge of the ink droplet having a relatively high viscosity also tends to wet and spread with respect to the substrate. In this case, the resin abundance ratio becomes higher. As a result, after the solvent is vaporized, the resin thickness (dimension in the direction perpendicular to the substrate surface) at the end portion becomes larger than the resin thickness at the center portion, forming a concave protrusion. As described above, the concave protrusion is elastically deformed by pressing and functions as a suction cup. On the other hand, since the concave protrusion itself does not have adhesiveness, it can be easily peeled off.

  First, the suction surface forming ink used in the present invention will be described. The suction surface forming ink includes water, resin fine particles, and a surfactant. The suction surface forming ink preferably further contains an organic solvent. Further, the suction surface forming ink may contain a coloring material.

(water)
The ink for forming the adsorption surface contains water as an essential component. The water is preferably ion-exchanged water, ultrafiltered water, reverse osmosis water, distilled water, or ultrapure water, more preferably ion-exchanged water, from the viewpoint of preventing impurities from being mixed.

(Resin fine particles)
The ink for forming the adsorption surface contains resin fine particles as an essential component. The resin fine particles are components that finally form concave protrusions when the suction surface forming ink is ejected from the inkjet head onto the substrate. The resin fine particles can be used alone or in combination of two or more at any ratio. Since the resin fine particles are in the form of fine particles in water, the resin fine particles are typically hydrophobic resin fine particles. Therefore, water resistance can be imparted to the concave protrusions. Further, since the resin is a polymer compound, elasticity can be imparted to the concave protrusion, and the concave protrusion can function as a sucker due to this elasticity.

  Examples of the resin constituting the resin fine particles include urethane resin, polyester resin, acrylic resin, vinyl acetate resin, polyethylene resin, polypropylene resin, fluoroolefin resin, butadiene resin, styrene resin, styrene-butadiene resin, styrene-acrylic resin, Examples thereof include ethylene-acrylic resin, vinyl chloride resin, acrylic-silicone resin, and fluororesin. What is necessary is just to determine suitably the kind of resin which comprises resin fine particle according to the kind of base material. The resin fine particles can be used alone or in combination of two or more at any ratio.

  The resin fine particles do not need to be composed of one kind of resin, and may be composed of two or more kinds of resins. For example, different types of monomers are emulsified in core-shell type resin particles with different resin compositions in the core and shell and acrylic particles (seed particles) prepared in advance to control the particle size. Fine particles obtained by polymerization can be used. Furthermore, hybrid resin fine particles obtained by chemically combining resin fine particles composed of different resins, such as fine particles made of acrylic resin and fine particles made of urethane resin, can be used.

  The particle diameter of the resin fine particles is, for example, 30 nm to 200 nm, preferably 40 nm to 150 nm, and more preferably 50 nm to 100 nm. If the particle size is less than 30 nm, the storage stability of the ink may be reduced. In addition, the recessed depth of the concave protrusion tends to be small, and the concave protrusion may not function as a suction cup. On the other hand, if the particle size exceeds 200 nm, the ejection of the suction surface forming ink from the ink jet head may become unstable, and the shape of the concave protrusions formed may become uneven.

  The glass transition temperature of the resin fine particles is preferably 60 ° C. or lower. When the glass transition temperature of the resin fine particles exceeds 60 ° C., the resin fine particles are not fused to each other on the base material after the ink for forming the suction surface is discharged, and there is a possibility that the concave projections functioning as the suction cups are hardly formed.

  The content of the resin fine particles (the total amount when a plurality of resins are used) is preferably 5.0% by mass or more as the solid content. When the content is less than 5.0% by mass, the recessed depth of the concave protrusion is likely to be small, and the concave protrusion may not function as a suction cup. The content is more preferably 7.5% by mass or more, and further preferably 10.0% by mass or more. On the other hand, the content is preferably 20.0% by mass or less. If the content exceeds 20.0% by mass, the storage stability of the ink may be lowered. The content is more preferably 17.5% by mass or less, and further preferably 15.0% by mass or less.

(Surfactant)
The ink for forming the adsorption surface contains a surfactant as an essential component. The surfactant contributes to adjusting the surface tension of the ink and improving the wettability with respect to the substrate. For this reason, the contact angle C25 with respect to the base material of the suction surface forming ink at 25 ° C. and the contact angle C65 with respect to the base material at 65 ° C. can be reduced. That is, it is a component for adjusting the contact angle C25 to the substrate at 25 ° C. and the contact angle C65 to the substrate at 65 ° C. Therefore, the ratio C65 / C25 can be easily adjusted within the range of 0.8 ≦ C65 / C25 ≦ 1.2 by adjusting the type and amount of the surfactant.

  Examples of the surfactant include acetylene glycol surfactants, silicone surfactants, fluorine surfactants, acrylic surfactants, polyoxyethylene alkyl ether surfactants, and the like. Of these, acrylic surfactants and polyoxyethylene alkyl ether surfactants are preferred because the ratio C65 / C25 can be easily adjusted within the range of 0.8 ≦ C65 / C25 ≦ 1.2. A commercially available product may be used as the surfactant. Examples of the acrylic surfactant include BYK-381 (manufactured by Big Chemie). Examples of the polyoxyethylene alkyl ether surfactant include Neugen TDS-80 (Daiichi Kogyo Seiyaku Co., Ltd.). Surfactant can be used individually by 1 type or in combination of 2 or more types by arbitrary ratios.

  The addition amount of the surfactant (the total amount when there are a plurality of surfactants) is appropriately determined so that 0.8 ≦ C65 / C25 ≦ 1.2 is satisfied according to the type of the surfactant used. It is good to set. However, if the amount added is too large, the remaining surfactant is unevenly distributed on the surface of the concave protrusion and lowers the coefficient of friction, so that the concave protrusion may not function as a suction cup.

(Organic solvent)
The ink for forming the suction surface may contain an organic solvent as an optional component. By appropriately containing an organic solvent in the suction surface forming ink, it is possible to improve ejection stability from the inkjet head, adhesion to the substrate, and the like. An organic solvent can be used individually by 1 type or in combination of 2 or more types by arbitrary ratios.

  The boiling point of the organic solvent to be used is preferably 100 ° C. or higher and 290 ° C. or lower from the viewpoint of stably forming concave protrusions. If the boiling point of the organic solvent is less than 100 ° C., for example, the solvent of the ink may be vaporized from an inkjet nozzle even in a room temperature environment, which may cause problems such as unstable ejection or non-ejection. . On the other hand, if the boiling point of the organic solvent exceeds 290 ° C., the ink deposited on the base material may not be dried and the concave protrusion may not be formed.

  Among organic solvents, a diol compound (that is, a compound having two OH groups in the chemical structural formula) is preferably used because it has higher moisture retention than a compound containing no or only one OH group. . Examples of the diol compound include ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, dipropylene glycol, 1,2-butanediol, 2,3-butanediol, 2-methyl-2,4-pentanediol, 1, 3-propanediol, 1,2-butanediol, 1,3-butanediol, 3-methyl-1,3-butanediol, 2,2-dimethyl-1,3-propanediol, 2-methyl-1,3 -Propanediol, 1,2-pentanediol, 2,4-pentanediol, 1,5-pentanediol, 2-methyl-2,4-pentanediol, 3-methyl-1,5-pentanediol, 1,6 -Hexanediol, 2-ethyl-1,3-hexanediol, 1,2-hexanediol, , 5-hexanediol, and the like.

  Among organic solvents, a glycol ether compound is preferably used because it has high permeability to the base material and improves adhesion. Examples of the glycol ether compound include ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, diethylene glycol monopentyl ether, diethylene glycol monohexyl ether, triethylene glycol. Monomethyl ether, triethylene glycol monoethyl ether, triethylene glycol monopropyl ether, triethylene glycol monobutyl ether, tetraethylene glycol monomethyl ether, tetraethylene glycol monobutyl ether, propylene glycol monomethyl ether, pro Lenglycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, dipropylene glycol dimethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, tripropylene glycol monomethyl ether, tripropylene glycol Monobutyl ether, 3-methoxy-1-butanol, 3-methoxy-3-methylbutanol, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, diethylene glycol diethyl ether, triethylene glycol diethyl ether, tetraethylene glycol die Ether, diethylene glycol methyl ethyl ether, triethylene glycol methyl ethyl ether, tetraethylene glycol methyl ethyl ether, diethylene glycol butyl methyl ether, triethylene glycol butyl methyl ether, tetraethylene glycol butyl methyl ether, propylene glycol dimethyl ether, tripropylene glycol dimethyl ether, etc. Can be mentioned.

  As the organic solvent, a water-soluble nitrogen-containing solvent may be used. Examples of the nitrogen-containing solvent include 2-pyrrolidone, N-methylpyrrolidone, N-ethylpyrrolidone, 3-methyl-2-oxazolidinone, 3-ethyl-2-oxazolidinone, N, N-dimethyl-β-methoxypropionamide. N, N-dimethyl-β-ethoxypropionamide, N, N-dimethyl-β-butoxypropionamide, N, N-dimethyl-β-pentoxypropionamide, N, N-dimethyl-β-hexoxypropionamide N, N-dimethyl-β-heptoxypropionamide, N, N-dimethyl-β-2-ethylhexoxypropionamide, N, N-dimethyl-β-octoxypropionamide, N, N-diethyl-β -Butoxypropionamide, N, N-diethyl-β-pentoxypropionamide, N, N-die Le -β- hexoxyphenyl propionamide, N, N-diethyl -β- heptene Toki Cipro propionamide, N, N-diethyl -β- octoxynol propionamide, and the like.

  The content of the organic solvent (the total amount when there are a plurality of organic solvents) may be appropriately set so that 0.8 ≦ C65 / C25 ≦ 1.2 is satisfied. The content of the organic solvent is, for example, 10% to 40% by mass, preferably 12% to 35% by mass, and more preferably 15% to 30% by mass. If the content is less than 10% by mass, there may be a problem such as non-ejection due to drying of ink in the nozzles of the inkjet head. On the other hand, when the added amount exceeds 40% by mass, there is a possibility that problems such as a decrease in storage stability of the ink may occur. Moreover, there is a possibility that the penetration into the base material becomes excessive and the inconvenience that the concave projection is not formed occurs.

(Coloring material)
The suction surface forming ink may contain a colorant as an optional component. When the suction surface forming ink contains a colorant, there are advantages such as improved visibility of the formed suction surface and imparting a function as an optical filter. Examples of the colorant include dyes and pigments. A coloring material can be used individually by 1 type or in combination of 2 or more types by arbitrary ratios.

  As the dye, for example, various dyes that are known to be usable for water-based inkjet inks can be used. Examples thereof include direct dyes, acid dyes, food dyes, basic dyes, and reactive dyes. , Disperse dyes, vat dyes and the like.

  More specifically, examples of the cyan dye include C.I. I. Acid Blue 1,7,9,15,22,23,25,27,29,40,41,43,45,54,59,60,62,72,74,78,80,82,83,90, 92, 93, 100, 102, 103, 104, 112, 113, 117, 120, 126, 127, 129, 130, 131, 138, 140, 142, 143, 151, 154, 158, 161, 166, 167, 168, 170, 171, 182, 183, 184, 187, 192, 199, 203, 204, 205, 229, 234, 236, 249, C.I. I. Direct Blue 1, 2, 6, 15, 22, 25, 41, 71, 76, 77, 78, 80, 86, 87, 90, 98, 106, 108, 120, 123, 158, 160, 163, 165 168, 192, 193, 194, 195, 196, 199, 200, 201, 202, 203, 207, 225, 226, 236, 237, 246, 248, 249, C.I. I. Reactive Blue 1, 2, 3, 4, 5, 7, 8, 9, 13, 14, 15, 17, 18, 19, 20, 21, 25, 26, 27, 28, 29, 31, 32, 33, 34, 37, 38, 39, 40, 41, 43, 44, 46, C.I. I. Food Blue 1, 2, C.I. I. Basic Blue 9, 25, 28, 29, 44 etc. are mentioned.

  Examples of the magenta dye include C.I. I. Acid Red 1,6,8,9,13,14,18,26,27,32,35,37,42,51,52,57,75,77,80,82,85,87,88,89, 92, 94, 97, 106, 111, 114, 115, 117, 118, 119, 129, 130, 131, 133, 134, 138, 143, 145, 154, 155, 158, 168, 180, 183, 184 186, 194, 198, 209, 211, 215, 219, 249, 252, 254, 262, 265, 274, 282, 289, 303, 317, 320, 321, 322, C.I. I. Direct Red 1, 2, 4, 9, 11, 13, 17, 20, 23, 24, 28, 31, 33, 37, 39, 44, 46, 62, 63, 75, 79, 80, 81, 83, 84, 89, 95, 99, 113, 197, 201, 218, 220, 224, 225, 226, 227, 228, 229, 230, 231, C.I. I. Reactive Red 1, 2, 3, 4, 5, 6, 7, 8, 11, 12, 13, 15, 16, 17, 19, 20, 21, 22, 23, 24, 28, 29, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 45, 46, 49, 50, 58, 59, 63, 64, C.I. I. Food Red 7, 9, 14 etc. are mentioned.

  Examples of yellow dyes include C.I. I. Acid Yellow 1,3,11,17,19,23,25,29,36,38,40,42,44,49,59,61,70,72,75,76,78,79,98,99, 110, 111, 127, 131, 135, 142, 162, 164, 165, C.I. I. Direct Yellow 1,8,11,12,24,26,27,33,39,44,50,58,85,86,87,88,89,98,110,132,142,144, Reactive Yellow 1, 2, 3, 4, 6, 7, 11, 12, 13, 14, 15, 16, 17, 18, 22, 23, 24, 25, 26, 27, 37, 42, C.I. I. Food Yellow 3, 4 etc. are mentioned.

  Examples of the black dye include C.I. I. Direct Black 1, 7, 19, 32, 51, 71, 108, 146, 154, 166 and the like.

  Examples of dyes other than cyan, magenta, yellow, and black include C.I. I. Acid Green 7, 12, 25, 27, 35, 36, 40, 43, 44, 65, 79, C.I. I. Direct Green 1, 6, 8, 26, 28, 30, 31, 37, 59, 63, 64, C.I. I. Reactive Green 6, 7, C.I. I. Direct Violet 2, 48, 63, 90, C.I. I. Reactive Violet 1, 5, 9, 10 etc. are mentioned.

  As the pigment, either an inorganic pigment or an organic pigment can be used. Examples of inorganic pigments include titanium oxide, zinc white, zinc sulfide, white lead, calcium carbonate, precipitated barium sulfate, white carbon, alumina white, kaolin clay, talc, bentonite, black iron oxide, cadmium red, red rose, molybdenum Red, molybdate orange, chrome vermilion, yellow lead, cadmium yellow, yellow iron oxide, titanium yellow, chromium oxide, viridian, titanium cobalt green, cobalt green, cobalt chrome green, Victoria green, ultramarine, bituminous, cobalt blue, cerulean Examples include blue, cobalt silica blue, cobalt zinc silica blue, manganese violet, and cobalt violet.

  Examples of organic pigments include azo pigments, phthalocyanine pigments, anthraquinone pigments, quinacridone pigments, isoindolinone pigments, quinophthalone pigments, dye lake pigments, and fluorescent pigments.

  More specifically, examples of cyan pigments include C.I. I. Pigment Blue 1, 2, 3, 15: 1, 15: 3, 15: 4, 15: 6, 16, 21, 22, 60, 64, and the like.

  Examples of magenta pigments include C.I. I. Pigment Red 5, 7, 9, 12, 31, 48, 49, 52, 53, 57, 97, 112, 120, 122, 146, 147, 149, 150, 168, 170, 177, 178, 179, 184 188, 202, 206, 207, 209, 238, 242, 254, 255, 264, 269, 282, C.I. I. Pigment Violet 19, 23, 29, 30, 32, 36, 37, 38, 40, 50 and the like.

  Examples of the yellow pigment include C.I. I. Pigment Yellow 1, 2, 3, 12, 13, 14, 16, 17, 20, 24, 74, 83, 86, 93, 94, 95, 109, 110, 117, 120, 125, 128, 129, 137, 138, 139, 147, 148, 150, 151, 154, 155, 166, 168, 180, 185, 213 and the like.

Examples of the black pigment include carbon black produced by a furnace method or a channel method. In particular, these carbon blacks have a primary particle diameter of 11 to 40 nm, a specific surface area by the BET method of 50 to 400 m ² / g, a volatile content of 0.5 to 10%, a pH value of 2 to 10 and the like. Those having the following are preferred. Examples of commercially available products having such characteristics include No. 33, 40, 45, 52, 900, 2200B, 2300, MA7, MA8, MCF88 (above, manufactured by Mitsubishi Chemical Co., Ltd.), RAVEN 1255 (produced by Colombian Carbon), REGA330R, 400R, 660R, MOGUL L, ELFTEX415 (above, NIPEX90, NIPEX150T, NIPEX160IQ, NIPEX170IQ, NIPEX75, Printex85, Printex95, Printex90, Printex35, PrintexU (above, manufactured by Evonik Degussa).

  Examples of pigments other than cyan, magenta, yellow, and black include C.I. I. Pigment Green 7, 10, 36, C.I. I. Pigment Brown 3, 5, 25, 26, C.I. I. Pigment Orange 2, 5, 7, 13, 14, 15, 16, 24, 34, 36, 38, 40, 43, 62, 63, 64, 71 and the like.

  When these pigments are used, it is preferable to uniformly disperse them in the ink in order to maintain long-term ink stability. As a method for dispersing the pigment, there are a method in which the pigment is surface-modified by oxidation treatment or the like, the pigment is self-dispersed without a dispersant, and a method in which the pigment is dispersed using a surfactant or a resin as a dispersant. In order to obtain a more stable adsorption surface forming ink, it is preferable that the pigment is self-dispersed or the pigment is dispersed using a resin as a dispersant.

  The added amount of the coloring material (the total amount when there are a plurality of coloring materials) is, for example, 0.1% by mass or more and 20.0% by mass or less as the solid content, and 1.0% by mass or more and 15. 0 mass% or less is preferable and 2.0 mass% or more and 10.0 mass% or less are more preferable.

(Other additives)
The ink for forming the adsorption surface may contain additives such as an antifoaming agent, a thickening agent, a pH adjusting agent, and a preservative in order to obtain an ink having desired characteristics in addition to the above components. Good. The addition amount of these additives is, for example, 0.01% by mass or more and 10.0% by mass or less, preferably 0.05% by mass or more and 5.0% by mass or less, and more preferably 0.1% by mass or more and 3.% by mass or less. 0 mass% or less is more preferable.

(Contact angle)
The suction surface forming ink satisfies 0.8 ≦ C65 / C25 ≦ 1.2, where C25 is the contact angle with the substrate at 25 ° C. and C65 is the contact angle with the substrate at 65 ° C. When the ratio C65 / C25 is in this range, a concave protrusion is formed, and sufficient adsorptivity can be obtained. The ink for forming the suction surface preferably satisfies 0.8 ≦ C65 / C25 ≦ 1.1, and more preferably satisfies 0.8 ≦ C65 / C25 ≦ 1.05. C25 is preferably 45 ° or more, more preferably 47.5 ° or more, and further preferably 50 ° or more. C25 is preferably 60 ° or less, preferably 57.5 ° or less, and more preferably 55 ° or less. C65 is preferably 36 ° or more, more preferably 38 ° or more, and still more preferably 40 ° or more. C65 is preferably 60 ° or less, more preferably 58 ° or less, and further preferably 56 ° or less. In the present specification, C25 and C65 are contact angles determined by the θ / 2 method, and can be measured according to a known method using a contact angle meter.

  Next, an operation of discharging the above suction surface forming ink from the inkjet head to the substrate will be described. The discharge operation can be performed in the same manner as the discharge operation performed by a known ink jet recording method (printing method). Specifically, for example, it can be performed by ejecting droplets of the ink for forming the suction surface from the nozzles of the ink jet head to the substrate by utilizing the vibration of the piezoelectric element.

  There is no restriction | limiting in particular in the kind of base material used, What is necessary is just to select suitably according to the use of an adsorption sheet. Examples of the substrate used include a polyvinyl chloride (PVC) substrate, a polyethylene terephthalate (PET) substrate, a surface-treated (corona-treated) polyethylene (PE) substrate, and a surface-treated (corona-treated) polypropylene (PP ) Non-absorbent substrates such as substrates and polystyrene substrates; and paper substrates such as art paper, coated paper, cast paper, high-quality paper, synthetic paper, and inkjet paper. An image may be formed on the surface of the substrate, particularly the surface opposite to the surface on which the adsorption surface is formed.

  In order to promote the drying of the suction surface forming ink discharged onto the substrate, the substrate may be heated at least one of before, during, and after discharge.

  Therefore, the method for producing an adsorption sheet of the present invention preferably includes heating the substrate. The heating method is not particularly limited and can be performed according to a known method. For example, a method in which a heat source is directly brought into contact with the base material to heat, a method in which the base material is irradiated with infrared rays, microwaves, etc. A method of blowing wind can be employed. In the heating step, heating is usually performed so that the temperature of the base material is 30 ° C. or higher and lower than the softening point of the base material. Here, it is preferable to heat so that the temperature of the base material is 40 ° C. or higher. When the temperature of the substrate is 40 ° C. or higher, the solvent is vigorously vaporized, the liquid droplet ends are easily thickened, and the resin fine particles are easily fused with each other, so that desired concave protrusions can be easily obtained. The temperature of the substrate is more preferably 50 ° C. or higher. On the other hand, from the viewpoint of preventing deformation of the substrate, the heating is performed so that the temperature of the substrate is preferably 80 ° C. or lower, more preferably 70 ° C. or lower.

  As described above, a large number of concave projections functioning as suction cups can be formed on the base material. That is, an adsorption sheet having an adsorption surface on a substrate can be manufactured. As described above, the method for manufacturing the suction sheet according to the present invention employs a method of ejecting specific ink from the ink jet head, so that the suction sheet is excellent in productivity and a recess having a uniform size is formed. be able to. Further, the suction surface can be formed at an arbitrary position of the base material.

  The obtained adsorption sheet can be used for various applications. In particular, when an adsorbing sheet is produced using a substrate on which an image has been formed in advance, it can be suitably used for advertising posters, sales promotion POPs, and the like. The adsorption sheet can be easily attached to indoor walls and windows of shops, etc .; sign boards; outdoor windows; car bodies and the like. Moreover, it can be easily peeled off and reused.

  From another aspect, the present invention provides a transport unit that transports a base material, a discharge unit that includes an inkjet head that discharges suction surface forming ink to the base material, and is connected to the discharge unit. An ink container for supplying the suction surface forming ink, the suction surface forming ink containing at least water, resin fine particles, and a surfactant, and the base of the suction surface forming ink at 25 ° C. When the contact angle to the material is C25 and the contact angle of the suction surface forming ink at 65 ° C. to the substrate is C65, 0.8 ≦ C65 / C25 ≦ 1.2 is satisfied, It is a manufacturing apparatus of an adsorption sheet. The adsorbing sheet manufacturing apparatus of the present invention is suitable for the implementation of the adsorbing sheet manufacturing method of the present invention described above.

  Hereinafter, the manufacturing apparatus of the suction sheet of the present invention will be described with reference to FIG. However, the ink jet recording apparatus of the present invention is not limited to the embodiment.

  FIG. 1 is a conceptual diagram of an adsorption sheet manufacturing apparatus 100 according to an embodiment of the present invention. The suction sheet manufacturing apparatus 100 includes a supply roller 21, a take-up roller 22, and a transport roller 23 as a transport unit 20 that transports the base material 10. The substrate 10 is unwound from the supply roller 21, passes over the platen 30, is transported by the transport roller 23, and is wound by the take-up roller 22. Therefore, in this embodiment, the conveyance direction of the base material 10 is a direction from the supply roller 21 toward the take-up roller 22. In addition, the structure of the conveyance part 20 is not restricted to the form shown in FIG. 1 as long as the base material 10 can be conveyed. As the base material 10, what was demonstrated as a base material used in the manufacturing method of the adsorption sheet of this invention can be used. The base material 10 is illustrated for convenience of explanation, and is not a constituent element of the suction sheet manufacturing apparatus 100.

  The suction sheet manufacturing apparatus 100 includes a heating unit 40. The heating unit 40 plays a role of heating the substrate 10. The heating unit 40 includes, for example, a contact heating type seat heater, a radiation heater that radiates infrared rays or microwaves, a hot air heater, and the like. The heating part 40 may be installed in any of the upper part and the lower part of the base material 10, and may be installed in both the upper part and the lower part. In the present embodiment, as shown in FIG. 1, the heating unit 40 is configured as a platen heater. In FIG. 1, the platen heater is composed of a single heater, but may be composed of a combination of separate heaters such as a preheater, a print heater, and a post heater. The heating unit 40 is such that the temperature of the substrate 10 is, for example, 30 ° C. or higher and lower than the softening point of the recording medium (preferably 40 ° C. or higher and 80 ° C. or lower, more preferably 50 ° C. or higher and 70 ° C. or lower). Heating conditions are set.

  The suction sheet manufacturing apparatus 100 includes a discharge unit 50 that discharges the suction surface forming ink 11 to the substrate 10. The ejection unit 50 includes, for example, an inkjet head that ejects the suction surface forming ink 11 from a fine nozzle into droplets using the vibration of a piezoelectric element. The suction sheet manufacturing apparatus 100 includes an ink storage unit 60, and the ink storage unit 60 is connected to the ejection unit 50. The ink storage unit 60 includes, for example, an ink cartridge. The suction surface forming ink 11 before discharge is stored in the ink storage portion 60, and the stored suction surface forming ink 11 is appropriately supplied to the discharge portion 50. Here, as the suction surface forming ink 11, those described as the suction surface forming ink used in the method of manufacturing the suction sheet of the present invention are used, and the preferred mode thereof is the same as described above. The discharge unit 50 is attached to the carriage 70. The carriage 70 can reciprocate along a guide rail (not shown), and the movement direction of the carriage 70 is perpendicular to the conveyance direction of the substrate 10. A heater may be attached to the carriage 70.

  During operation of the suction sheet manufacturing apparatus 100, the substrate 10 is transported by the transport unit 20. The substrate 10 is heated by the heating unit 40 when conveyed to the lower part of the discharge unit 50. Subsequently, the ejection unit 50 ejects the suction surface forming ink 11 from the inkjet head to the base material 10 in the form of droplets, while the other end is in the direction perpendicular to the transport direction of the base material 10. Run until. When the suction surface forming ink 11 discharged onto the base material 10 is wet and spread, the solvent contained in the suction surface forming ink 11 is vaporized, and the resin fine particles contained in the suction surface forming ink 11 are fused together. A concave protrusion is formed. As a result, a suction surface composed of a large number of concave protrusions is formed on the base material 10.

  Since the suction sheet manufacturing apparatus of the present invention employs a technique of ejecting specific ink from an inkjet head, it is excellent in productivity of the suction sheet and can form a recess having a uniform size. Further, the suction surface can be formed at an arbitrary position of the base material.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not restrict | limited to these Examples. In the following description, “part” represents “part by mass”.

<Preparation of ink 1>
Purified water 51.1 parts, propylene glycol 10.0 parts, 2-methyl-1,3-propanediol 5.0 parts, polyoxyethylene alkyl ether surfactant “Neugen TDS-80” (Daiichi Kogyo Seiyaku Co., Ltd.) And 33.3 parts of urethane resin fine particle emulsion “Superflex 820” (Daiichi Kogyo Seiyaku Co., Ltd., solid content: 30.0 wt%) were mixed and stirred in a 25 ° C. environment, and then 3 μm cellulose acetate. Ink 1 was obtained by filtration through a filter.

<Preparation of ink 2>
51.1 parts of purified water, 10.0 parts of propylene glycol, 5.0 parts of 2-methyl-1,3-propanediol, 0.6 parts of an acrylic surfactant “BYK-381” (manufactured by BYK Chemie), and Urethane resin fine particle emulsion “Superflex 820” (Daiichi Kogyo Seiyaku Co., Ltd., solid content: 30.0 wt%) 33.3 parts was mixed and stirred in an environment of 25 ° C., and then filtered through a 3 μm cellulose acetate filter to obtain ink 2. Obtained.

<Preparation of ink 3>
67.7 parts of purified water, 10.0 parts of propylene glycol, 5.0 parts of 2-methyl-1,3-propanediol, polyoxyethylene alkyl ether surfactant “Neugen TDS-80” (Daiichi Kogyo Seiyaku Co., Ltd.) 1 part of urethane resin fine particle emulsion “Superflex 820” (Daiichi Kogyo Seiyaku Co., Ltd., solid content: 30.0 wt%) was mixed and stirred in a 25 ° C. environment and mixed with 3 μm cellulose acetate. Ink 3 was obtained by filtration through a filter.

<Preparation of ink 4>
17.7 parts of purified water, 10.0 parts of propylene glycol, 5.0 parts of 2-methyl-1,3-propanediol, polyoxyethylene alkyl ether surfactant “Neugen TDS-80” (Daiichi Kogyo Seiyaku Co., Ltd.) 0.6 parts) and 66.7 parts of urethane resin fine particle emulsion “Superflex 820” (Daiichi Kogyo Seiyaku Co., Ltd., solid content: 30.0 wt%) were mixed and stirred in a 25 ° C. environment, and then 3 μm cellulose acetate. Ink 4 was obtained by filtration through a filter.

<Preparation of ink 5>
60.3 parts purified water, 10.0 parts propylene glycol, 5.0 parts 2-methyl-1,3-propanediol, polyoxyethylene alkyl ether surfactant “Neugen TDS-80” (Daiichi Kogyo Seiyaku Co., Ltd.) 0.62 parts) and 24.1 parts of acrylic resin fine particle emulsion “PE-1126” (manufactured by Seiko PMC, solid content: 41.5 wt%) were mixed and stirred in a 25 ° C. environment, and then mixed with a 3 μm cellulose acetate filter. Filtration gave ink 5.

<Preparation of ink 6>
44.4 parts of purified water, 10.0 parts of propylene glycol, 5.0 parts of 2-methyl-1,3-propanediol, polyoxyethylene alkyl ether surfactant “Neugen TDS-80” (Daiichi Kogyo Seiyaku Co., Ltd.) 0.6 parts) and 40.0 parts of polyester resin fine particle emulsion “Vinaroll MD-1480” (manufactured by Toyobo Co., Ltd., solid content: 25.0 wt%) were mixed and stirred in a 25 ° C. environment, and then mixed with a 3 μm cellulose acetate filter. Ink 6 was obtained by filtration.

<Preparation of ink 7>
45.0 parts purified water, 10.0 parts propylene glycol, 5.0 parts 2-methyl-1,3-propanediol, polyoxyethylene alkyl ether surfactant “Neugen TDS-80” (Daiichi Kogyo Seiyaku Co., Ltd.) 0.62 parts) and 25.4 parts of an ethylene-acrylic resin fine particle emulsion “S-3121” (manufactured by Toho Chemical Industry Co., Ltd., solid content: 25.0 wt%) were mixed and stirred in a 25 ° C. environment, and then 3 μm cellulose. Ink 7 was obtained by filtration through an acetate filter.

<Preparation of ink 8>
52.0 parts of purified water, 10.0 parts of propylene glycol, 5.0 parts of 2-methyl-1,3-propanediol, polyoxyethylene alkyl ether surfactant “Neugen TDS-80” (Daiichi Kogyo Seiyaku Co., Ltd.) And 32.4 parts of urethane resin fine particle emulsion “Superflex 870” (Daiichi Kogyo Seiyaku Co., Ltd., solid content: 30.9 wt%) were mixed and stirred in a 25 ° C. environment, and then 3 μm cellulose acetate. Ink 8 was obtained by filtration through a filter.

<Preparation of ink 9>
60.4 parts of purified water, 10.0 parts of propylene glycol, 5.0 parts of 2-methyl-1,3-propanediol, polyoxyethylene alkyl ether surfactant “Neugen TDS-80” (Daiichi Kogyo Seiyaku Co., Ltd.) 2 parts of styrene-acrylic resin fine particle emulsion “Movinyl 6969D” (manufactured by Nippon Synthetic Chemical Co., Ltd., solid content: 42.5 wt%) was mixed and stirred in a 25 ° C. environment, and then 3 μm cellulose acetate. Ink 9 was obtained by filtration through a filter.

<Preparation of ink 10>
41.1 parts of purified water, 10.0 parts of propylene glycol, 5.0 parts of 2-methyl-1,3-propanediol, polyoxyethylene alkyl ether surfactant “Neugen TDS-80” (Daiichi Kogyo Seiyaku Co., Ltd.) 0.6 parts, urethane resin fine particle emulsion “Superflex 820” (Daiichi Kogyo Seiyaku Co., Ltd., solid content 30.0 wt%) 33.3 parts, and dye dispersion Duasynjet M250 (Clariant Chemicals Co., Ltd., solid content) 10.0 wt%) 10.0 parts were mixed and stirred in a 25 ° C. environment, and then filtered through a 3 μm cellulose acetate filter to obtain ink 10.

<Preparation of ink 11>
Purified water 50.5 parts, propylene glycol 10.0 parts, 2-methyl-1,3-propanediol 5.0 parts, polyoxyethylene alkyl ether surfactant “Neugen TDS-80” (Daiichi Kogyo Seiyaku Co., Ltd.) 1.2 parts) and 33.3 parts of urethane resin fine particle emulsion “Superflex 820” (Daiichi Kogyo Seiyaku Co., Ltd., solid content: 30.0 wt%) were mixed and stirred in a 25 ° C. environment, and then 3 μm cellulose acetate. Ink 11 was obtained by filtration through a filter.

<Preparation of ink 12>
51.6 parts of purified water, 10.0 parts of propylene glycol, 5.0 parts of 2-methyl-1,3-propanediol, polyoxyethylene alkyl ether surfactant “Neugen TDS-80” (Daiichi Kogyo Seiyaku Co., Ltd.) 0.1 parts of urethane resin fine particle emulsion “Superflex 820” (Daiichi Kogyo Seiyaku Co., Ltd., solid content: 30.0 wt%) 33.3 parts were mixed and stirred in a 25 ° C. environment, and then 3 μm cellulose acetate. Ink 12 was obtained by filtration through a filter.

<Preparation of ink 13>
51.1 parts of purified water, 10.0 parts of propylene glycol, 5.0 parts of 2-methyl-1,3-propanediol, 0.6 part of a silicone surfactant “BYK-349” (manufactured by BYK Chemie), and Urethane resin fine particle emulsion “Superflex 820” (Daiichi Kogyo Seiyaku Co., Ltd., solid content: 30.0 wt%) 33.3 parts was mixed and stirred in an environment of 25 ° C., and then filtered through a 3 μm cellulose acetate filter. Obtained.

<Preparation of ink 14>
51.1 parts of purified water, 10.0 parts of propylene glycol, 5.0 parts of 2-methyl-1,3-propanediol, silicone surfactant “Silface SAG503A” (manufactured by Nissin Chemical Industry Co., Ltd.) 0.6 Parts and 33.3 parts of urethane resin fine particle emulsion “Superflex 820” (Daiichi Kogyo Seiyaku Co., Ltd., solid content: 30.0 wt%) were mixed and stirred in a 25 ° C. environment, and then filtered through a 3 μm cellulose acetate filter. Ink 14 was obtained.

<Preparation of ink 15>
51.1 parts of purified water, 10.0 parts of propylene glycol, 5.0 parts of 2-methyl-1,3-propanediol, 0.6 part of a fluorosurfactant “Factent 251” (manufactured by Neos), and Urethane resin fine particle emulsion “Superflex 820” (Daiichi Kogyo Seiyaku Co., Ltd., solid content: 30.0 wt%) 33.3 parts were mixed and stirred in an environment of 25 ° C., and then filtered through a 3 μm cellulose acetate filter to obtain ink 15. Obtained.

  For the inks 1 to 15 prepared above, the contact angle C25 to the substrate at 25 ° C. and the contact angle C65 to the substrate at 65 ° C. were measured by the following methods. Tables 1 and 2 show the composition and contact angle measurement results for each ink.

<Contact angles C25, C65>
For the measurement of the contact angle, a contact angle meter “DM-501Hi” (manufactured by Kyowa Interface Science Co., Ltd.) was used. The stage was removed and a hot plate NINOS NA-1 (manufactured by AS ONE) was installed. Measurement is performed while heating the surface to be measured to the set temperature (25 ° C and 65 ° C) with a hot plate in an environment with a temperature of 25 ± 5 ° C and humidity of 50 ± 10%. Asked. As the contact angle, an average value of 5 times of the value of 0.3 sec after the ink 1.0 μL was contacted with the target (target substrate) was adopted.

(Examples and Comparative Examples)
The produced inks 1 to 15 were ejected from an ink jet printer having an ink jet head with respect to the base material to produce an adsorbing sheet and evaluated. The specific contents are shown below. The evaluation results are shown in Tables 1 and 2.

<Adsorption>
A platen heater of an ink jet printer VG-640 (manufactured by Roland DG Co., Ltd.) was set to 60 ° C., and a 10 mm square solid pattern was printed on the four corners of a predetermined substrate cut to A4 size in the standard mode. After being left for 24 hours in an environment of 23 ° C. and 50% RH, it was pressed onto a polypropylene plate with a finger and attached, and the time until it dropped was measured and evaluated according to the following criteria. Note that ORAJET 3164G (manufactured by ORAFUL) was used as the PVC base material, Lumirror T60 (manufactured by Toray Industries, Inc.) as the PET base material, and SAN8040 (manufactured by Sampratec) as the PE base material.
◎ ・ ・ ・ 1 hour or more ○ ・ ・ ・ 10 minutes or more and less than 1 hour △ ・ ・ ・ 1 minute or more and less than 10 minutes × ・ ・ ・ less than 1 minute

<Abrasion resistance>
A platen heater of an inkjet printer VG-640 (manufactured by Roland DG Inc.) was set to 60 ° C., and a solid pattern was printed on a predetermined substrate in the standard mode. After leaving for 24 hours in an environment of 23 ° C. and 50% RH, a white cotton cloth (gold width 3) is attached to the Gakushin friction fastness tester AB-301 (manufactured by Tester Sangyo Co., Ltd.) on the printed surface, and the load is 500 g 100 reciprocations at a repetitive speed of 30 reciprocations per minute. Appropriate illumination was applied to the tested part, and the peeled state was visually evaluated in four stages.
◎ ・ ・ ・ No peeling is observed ○ ・ ・ ・ Peeling is observed in an area of less than 10% Δ ・ ・ ・ Peeling is observed in an area of 10% or more and less than 25% × ・ ・ ・ In an area of 25% or more There is peeling

<Water resistance>
A platen heater of an inkjet printer VG-640 (manufactured by Roland DG Inc.) was set to 60 ° C., and a solid pattern was printed on a predetermined substrate in the standard mode. After leaving for 24 hours in an environment of 23 ° C. and 50% RH, a white cotton cloth (gold width 3) in which water is added to a Gakushin type friction fastness tester AB-301 (manufactured by Tester Sangyo Co., Ltd.) on the printed surface. Attachment, load load 500 g, repetitive speed 30 reciprocations per minute 100 reciprocations. Appropriate illumination was applied to the tested part, and the peeled state was visually evaluated in four stages.
◎ ・ ・ ・ No peeling is observed ○ ・ ・ ・ Peeling is observed in an area of less than 10% Δ ・ ・ ・ Peeling is observed in an area of 10% or more and less than 25% × ・ ・ ・ In an area of 25% or more There is peeling

  As shown in Tables 1 and 2, when the suction surface forming ink containing at least water, resin fine particles, and surfactant is discharged from the inkjet head to the substrate, the contact angle C25 and the contact angle C65 are 0.8. When satisfying ≦ C65 / C25 ≦ 1.2, it can be seen that the printing surface functions as an adsorption surface. In addition, when the adsorption surface of Example 10 which added the coloring material was analyzed using the scanning electron microscope, it has confirmed that the concave-shaped protrusion was formed.

  The adsorption sheet produced by the present invention can be used for various applications, and is suitable for advertising posters, sales promotion POPs, and the like.

DESCRIPTION OF SYMBOLS 10 Substrate 11 Adsorption surface forming ink 20 Conveyance unit 21 Supply roller 22 Take-up roller 23 Conveyance roller 30 Platen 40 Heating unit 50 Discharge unit 60 Ink storage unit 70 Carriage 100 Adsorption sheet manufacturing apparatus

Claims (14)

Including discharging at least water, resin fine particles, and an ink for forming an adsorption surface containing a surfactant from an inkjet head onto a substrate;
When the contact angle of the suction surface forming ink at 25 ° C. to the substrate is C25 and the contact angle of the suction surface forming ink at 65 ° C. to the substrate is C65, 0.8 ≦ C65 / C25 The manufacturing method of the adsorption sheet characterized by satisfying ≦ 1.2.   The method for producing an adsorption sheet according to claim 1, wherein the surfactant is an acrylic surfactant or a polyoxyethylene alkyl ether surfactant.   The method for producing an adsorption sheet according to claim 1 or 2, wherein the content of the resin fine particles in the adsorption surface forming ink is 5% by mass or more and less than 20% by mass.   The manufacturing method of the adsorption sheet of any one of Claims 1-3 whose glass transition temperature of the said resin fine particle is 60 degrees C or less.   The method for manufacturing an adsorption sheet according to any one of claims 1 to 4, wherein the adsorption surface forming ink further contains an organic solvent.   The method for manufacturing an adsorption sheet according to claim 1, wherein the adsorption surface forming ink further contains a coloring material.   The manufacturing method of the adsorption sheet of any one of Claims 1-6 which further includes heating the said base material. A transport unit for transporting the substrate;
A discharge portion including an inkjet head for discharging the suction surface forming ink to the substrate;
An ink storage unit connected to the discharge unit and supplying the suction surface forming ink to the discharge unit;
With
The suction surface forming ink contains at least water, resin fine particles, and a surfactant, the contact angle of the suction surface forming ink at 25 ° C. with respect to the substrate is C25, and the suction surface forming ink at 65 ° C. When the contact angle of the ink with respect to the substrate is C65, 0.8 ≦ C65 / C25 ≦ 1.2 is satisfied,
Adsorption sheet manufacturing equipment.   The apparatus for producing an adsorption sheet according to claim 8, wherein the surfactant is an acrylic surfactant or a polyoxyethylene alkyl ether surfactant.   The suction sheet manufacturing apparatus according to claim 8 or 9, wherein a content of the resin fine particles in the suction surface forming ink is 5% by mass or more and less than 20% by mass.   The manufacturing apparatus of the adsorption sheet of any one of Claims 8-10 whose glass transition temperature of the said resin fine particle is 60 degrees C or less.   The suction sheet manufacturing apparatus according to claim 8, wherein the suction surface forming ink further contains an organic solvent.   The suction sheet manufacturing apparatus according to claim 8, wherein the suction surface forming ink further contains a colorant.   The suction sheet manufacturing apparatus according to claim 8, further comprising a heating unit that heats the base material.

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