JP2007062104A - Printable medium contact member, printing device member and method for manufacturing printable medium contact member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printable medium contact member which is highly durable and highly ink-repellent, and a printing device member and a method for manufacturing the printable medium contact member. <P>SOLUTION: The printable medium contact member has a low surface tension coated layer 11 formed on the surface of a base material 10, and the low surface tension coated layer 11 is covered with a monolayer of a molecule consisting of a low surface tension development part 12 with high ink repellency and a chemical reaction part 13 which chemically reacts with the surface of the base material 10. The monolayer is composed of a chemical compound having at least the low surface tension development part 12 which comes into contact with a printable medium and a chemical reaction part 13 which performs an interaction with the surface of the base material 10. Thus, the printable medium contact member has high ink repellency and high durability. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a printing body contact member, a printing apparatus member, and a method for manufacturing a printing body contact member.

  In general, in a double-sided printing machine, the preprinted printing surface comes into contact with the impression cylinder of the postprinting and receives printing pressure in about 1 second or less after printing. For this reason, in a sheet-fed double-sided printing machine, undried pre-printed ink is taken on the impression cylinder, density unevenness on the printing surface, white spots and ink adhering to the impression cylinder are reversely transferred to the next paper and the paper surface becomes dirty, etc. , Defects in print quality occur on the preprinted surface and the postprinted surface.

  Therefore, as a measure for suppressing such ink adhesion, a technique has been proposed in which the surface of the base material of the impression cylinder is made uneven to prevent ink adhesion by a point contact effect with the printing surface (see, for example, Patent Document 1). ).

  In addition, a technique using a material having good releasability on the surface of the impression cylinder has been proposed (see, for example, Patent Document 2).

  In addition, a pressing / transfer roller having an uneven surface and a low surface energy (that is, good releasability) surface has also been proposed (see, for example, Patent Document 3).

  However, as a specific technique for making irregularities on the surface of the impression cylinder substrate, various methods such as blasting the surface, applying glass bead coating, and ceramic spraying are adopted. If the surface of the material is simply provided with unevenness, the ink repellent property (releasing property) is weak, so that a sufficient ink adhesion preventing effect is not obtained.

  In addition, examples of the material having good releasability include silicone resins and fluorine resins. However, when only these resins are applied to the base material, the wear resistance is low and the durability is low. There is a problem that it cannot be applied to the required impression cylinder.

  In addition, it has been proposed that the low surface energy ink-repellent layer formed on the irregularities is a self-assembled monomolecular film with at least one derivative of an ambipolar organic compound having a polar region having acid characteristics ( For example, see Patent Document 4).

Japanese Patent Publication No.53-7841 JP-A-62-94392 JP-A-8-12151 JP 2004-98682 A

  However, in the proposal disclosed in Patent Document 4, since the functional group that interacts with the concavo-convex surface has only an acid property, the interaction between the derivative and the concavo-convex surface is weak, and the ink repellent layer having a low surface energy. There is a problem that there is no durability.

  This invention makes it a subject to provide the manufacturing method of the to-be-printed body contact member which has high durability and high ink repellency, the member for printing apparatuses, and the to-be-printed body contact member in view of the said problem.

  A first invention of the present invention for solving the above-mentioned problem is a printed material contact member having a low surface tension coating layer on the surface of a substrate, wherein the low surface tension coating layer is a printed material. A printed material contact member characterized in that a monomolecular layer is composed of a compound having at least a low surface tension developing portion that contacts and a chemical reaction portion that interacts with the substrate surface.

  According to a second aspect of the present invention, in the first aspect of the invention, the printed material contact member is characterized in that the chemical reaction portion interacts with an adjacent chemical reaction portion.

According to a third invention, in the first or second invention, the chemical reaction portion is any one of an epoxy group, an isocyanate group, and a group represented by the formula (1), In the member.

  A fourth invention is the printed material contact member according to any one of the first to third inventions, wherein the low surface tension developing part has a fluorine atom.

A fifth invention is characterized in that, in any one of the first to fourth inventions, the density of the compound constituting the low surface tension coating layer is higher than 2 molecules / nm ^2. Located on the body contact member.

  A sixth invention is the printed material contact member according to any one of the first to fifth inventions, further comprising a silica-based compound layer between the base material and the low surface tension coating layer. .

  According to a seventh invention, in any one of the first to sixth inventions, the base material is a base material made of a base metal, or a base material having a synthetic resin coating layer on the base metal plate, or Any one of the substrates having a fine concavo-convex structure composed of a ceramic particle-dispersed adhesive layer in which ceramic particles are dispersed and bonded by an adhesive with a part of the particles exposed from the adhesive layer on the surface of the synthetic resin coating layer. It is in the printed material contact member.

  According to an eighth invention, in the seventh invention, the substrate having the fine structure is formed by coating an adhesive resin layer capable of chemically reacting with the chemical reaction portion on the ceramic particle-dispersed adhesive layer. The printed material contact member is a substrate having a fine structure.

  According to a ninth aspect of the present invention, in the eighth aspect of the invention, the printed material contact member according to the eighth aspect of the present invention further includes a microstructure formed by subjecting the surface of the adhesive resin layer to a reaction activation treatment with the chemical reaction portion. is there.

  According to a tenth aspect of the present invention, in the printed material contact member according to any one of the first to seventh aspects, the base material is a metal base material having a fine structure having fine irregularities on the surface. is there.

  An eleventh invention is the printed material contact member according to any one of the first to seventh inventions, wherein the substrate is a metal plate having a smooth surface.

  A twelfth aspect of the present invention is a printing apparatus member comprising any one of the first to eleventh printed member contact members.

  A thirteenth invention is the printing device member according to the twelfth invention, wherein the printing device member is an impression cylinder, a sample stage, a vacuum suction wheel, or a color measuring device.

  14th invention is a manufacturing method of the to-be-printed body contact member which has a low surface tension coating layer on the surface of a base material, Comprising: It has a low surface tension expression part and a reaction part chemically bonded with the base material surface at least In the method for producing a printed material contact member, a compound is provided on a surface of a base material, the reaction portion and the base material are reacted to form a monomolecular layer on the surface of the base material.

According to a fifteenth aspect of the invention, in the fourteenth aspect, the chemical reaction portion is any one of an epoxy group, an isocyanate group, and a group represented by the formula (1). In the manufacturing method.

  According to a sixteenth aspect of the present invention, in the fourteenth or fifteenth aspect of the invention, the low surface tension developing portion has a fluorine atom.

A seventeenth invention is the printing object according to any one of the fourteenth to sixteenth inventions, wherein the density of the compound constituting the low surface tension coating layer is higher than 2 molecules / nm ^2. It exists in the manufacturing method of a body contact member.

  According to an eighteenth aspect of the invention, in any one of the fourteenth to seventeenth aspects, the printed material contact member has a silica-based compound layer between the substrate and the low surface tension coating layer. Is in the way.

  According to a nineteenth aspect of the invention, in any one of the fourteenth to eighteenth aspects, the base material is a base material made of a base metal, or a base material having a synthetic resin coating layer on the base metal plate, or Any one of the substrates having a fine concavo-convex structure composed of a ceramic particle-dispersed adhesive layer in which ceramic particles are dispersed and bonded by an adhesive with a part of the particles exposed from the adhesive layer on the surface of the synthetic resin coating layer. It exists in the manufacturing method of the to-be-printed body contact member characterized by being.

  According to a twentieth aspect, in the nineteenth aspect, the substrate having the microstructure is formed by coating an adhesive resin layer capable of chemically reacting with the chemical reaction portion on the ceramic particle-dispersed adhesive layer. It is in the manufacturing method of the to-be-printed body contact member characterized by being a base material which has a fine structure.

  According to a twenty-first aspect of the invention, in the twentieth aspect, the surface of the adhesive resin layer is further subjected to a reaction activation treatment with the chemical reaction portion. .

  A twenty-second aspect of the present invention is the printing member contact member according to any one of the fourteenth to the eighteenth aspects, wherein the substrate is a metal substrate having a fine structure having fine irregularities on the surface. In the manufacturing method.

  According to a twenty-third aspect of the present invention, in any one of the fourteenth to eighteenth aspects, the substrate is a metal plate having a smooth surface.

  According to the present invention, water-repellent atoms are introduced into the low surface tension developing portion to lower the polarity and improve the ink repellency, while forming a strong chemical bond with the base material surface by the chemically bonding reactive group. And forms a highly durable film. Furthermore, since the molecules are oriented on the substrate surface, the packing density is high, and the strength as a film can be improved by the interaction between molecules, so that a printed material contact member having high durability and high ink repellency can be obtained. Can do.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

[Embodiment of the Invention]
A printed material contact member according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a conceptual diagram illustrating a printing medium contact member according to an embodiment.
As shown in FIG. 1, the printed body contact member according to the present embodiment is a printed body contact member having a low surface tension coating layer 11 on the surface of a substrate 10, and the low surface tension coating layer 11 is A monomolecular layer comprising a compound having at least a low surface tension developing part 12 that comes into contact with a substrate to be printed and a chemical reaction part 13 having an interaction with the substrate surface (first interaction 21) It is.
In this invention, while having the low surface tension expression part 12 which has high ink repellency, it coat | covers with the monomolecular layer of the molecule | numerator which consists of the chemical reaction part 13 which reacts with the surface of the base material 10, and it has ink repellency. The printed material contact member is high and has high durability.
Further, as shown in FIG. 2, a third structure portion (for example, —O—) 14 may be provided between the low surface tension developing portion 12 and the chemical reaction portion 13.

Here, by having the chemical reaction part 13, a monomolecular film (Close packed & Lateral Interacted Monolayer: CLM) that interacts between adjacent molecules at high density is formed.
In addition, as an interaction between adjacent molecules (second interaction 22), chemical bond formation is preferable, but hydrogen bond formation or physical attraction may be used. The physical attraction is a so-called van der Waals force and is an action caused by dipole attraction, dispersion, induced dipole attraction, and the like.

  In addition, the reactive group of the compound reaction part of the present invention reacts with the OH group present on the surface of the base material 10, but in particular for molecules in which two or more Cl or OR are bonded to Si, When Cl or OR reacts with the base material, the number of bonds between the molecule and the base material increases, so that the durability of the low surface tension layer increases.

  Furthermore, even if not all Cl or OR can react with the substrate, Cl or OR that does not react with the substrate reacts with unreacted Cl or OR of the adjacent molecule to form an intermolecular bond. , Membrane strength increases.

  Furthermore, even when chemical bonds cannot be formed between the molecules, all molecules that have reacted with the base material react with the reactive group directed toward the base material, forming an orientation with the low surface tension-expressing part facing outward. Since molecules attract each other by physical attraction, by forming a monomolecular film (Close packed & Lateral Interacted Monolayer: CLM) that interacts between neighboring molecules at a higher density than when molecules exist randomly, The film strength is remarkably increased.

  In other words, a functional group having low polarity is introduced into the low surface tension developing part to improve ink repellency, while a chemically bonded reactive group forms a strong chemical bond with the substrate surface and has high durability. Form a film. In addition, molecules have a high packing density because the molecular chains are oriented almost perpendicularly to the substrate surface, and the strength of the film can be improved by the interaction between molecules (chemical bond, hydrogen bond, physical attraction). Further, it is possible to obtain a printed material contact member having high durability and high ink repellency.

Here, as said chemical reaction part 13, any one of an epoxy group, an isocyanate group, or group represented by Formula (1) can be mentioned.

Examples of the compound having an epoxy group represented by the formula (2) include 1,2-epoxydecane, 1,2-epoxydodecane, 1,2-epoxyhexadecane, and 1,2-epoxyoctadecane. However, the present invention is not limited to these.

Examples of the compound having an isocyanate group (R ₁ —N═C═O, where R ₁ represents an alkyl group) include dodecyl isocyanate, octadecyl isocyanate, 3-isocyanatopropyltriethoxysilane, and the like. However, the present invention is not limited to these.

  Examples of the compound having a group represented by the formula (1) include octadecyldimethylchlorosilane, octadecylmethyldichlorosilane, octadecyltrichlorosilane and the like as compounds in which X is Cl. Examples of the compound in which X is alkoxide OR ′ include hexyltrimethoxysilane, octadecylmethyldimethoxysilane, octadecyltriethoxysilane, octadecyltrimethoxysilane and the like, but the present invention is not limited thereto. .

Further, the low surface tension developing part 12 has a fluorine atom.
That is, in order to form the low surface tension developing portion 12, it is sufficient to have a structure in which at least a part of H atoms in the carbon chain is substituted with F atoms.
Therefore, by substituting at least a part of the H atoms of the carbon chain with F atoms, the polarity of the low surface tension developing portion is further reduced, and the ink repellency is further improved.
Examples of such compounds include compounds in which X in formula (1) is Cl, such as trifluoropropyltrichlorosilane, heptadecafluorodecylmethyldichlorosilane, heptadecafluorodecyltrichlorosilane, and tridecafluorooctyltrichlorosilane. Can be mentioned. Further, as compounds in which X is alkoxide OR ′, trifluoropropyltrimethoxysilane, heptadecafluorodecylmethyldimethoxysilane, heptadecafluorodecyltrimethoxysilane, heptadecafluorodecyltriethoxysilane, tridecafluorooctyltrimethoxysilane In addition, “OPTOOL DSX” (trade name: manufactured by Daikin Industries, Ltd.), which is a fluorine-based surface treatment agent, can be used, but the present invention is not limited thereto.

  3A is a schematic diagram illustrating an example of the formula (1), and FIG. 3B is a schematic diagram illustrating an example in which an F group is introduced therein.

In addition, when F atoms are introduced into a molecule in order to improve ink repellency, the interaction as a physical attractive force between molecules when a monomolecular layer is formed is reduced. This is because the CF ₂ repeating carbon chain has a smaller intramolecular polarization and less intermolecular cohesion than the CH ₂ repeating carbon chain.
Thereby, the surface tension is also reduced by introducing F atoms.

Further, the reason why Teflon (registered trademark) has low wear resistance is that the cohesive force between molecules is small for the same reason. Therefore, the conventional impression cylinder jacket whose surface is simply coated with a fluororesin that cannot be expected to react with the base material has low durability.
Therefore, in the present invention, it has a low surface tension developing portion having high ink repellency, and is coated with a monomolecular layer of a molecule that reacts with the surface of the base material, so that printing with high ink repellency and high durability is performed. It is a body contact member.

Here, the reactive group of the compound of the present invention reacts with the OH group present on the surface of the substrate, but in particular, in the molecule in which two or more Cl or OR is bonded to Si, all Cl or OR is the substrate It is considered that the durability of the low surface tension layer increases because the number of bonds between the molecule and the substrate increases.
Furthermore, even if not all Cl or OR can react with the substrate, Cl or OR that does not react with the substrate reacts with unreacted Cl or OR of the adjacent molecule to form an intermolecular bond. , Membrane strength increases.

  That is, the low surface tension developing part 12 introduces F atoms to further lower the polarity to improve the ink repellency, while the chemical reaction part 13 has a strong chemical bond with the substrate surface by a reactive group that chemically bonds. And a highly durable film is formed by the synergistic effect of the two.

  In particular, in molecules having Si—Cl or Si—OR, a maximum of three chemical bonds per molecule are formed between the base material and the durability. Alternatively, Si—Cl or Si—OR that could not react with the base material is bonded between molecules, improving the strength as a film and increasing the durability.

The density of the compound constituting the low surface tension coating layer is preferably higher than 2 molecules / nm ² .

Here, when the compound forming the low surface tension coating layer has a low density of less than 2 molecules / nm ² , the surface tension is not sufficiently lowered, and the ink repellency, that is, the ink adhesion preventing function is insufficient. Moreover, it is because the interaction function between molecules cannot be expressed at a low density, which is not preferable from the viewpoint of durability.

  Moreover, you may make it have a silica type compound layer between the said base material and the said low surface tension coating layer.

  Here, the bulk of the silica-based compound layer is mainly composed of silicon atoms (Si) and oxygen atoms (O), and the surface is covered with a sufficient amount of OH groups. Therefore, it is possible to react in a state where the compound forming the low surface tension coating layer is closely packed, so that high ink repellency can be expressed.

Also, by providing the silica-based compound layer between the base material and the low surface tension coating layer, and covering the base material, the influence on the low surface tension coating layer due to the difference in the composition of the base material can be substantially eliminated. It becomes possible.
Furthermore, the silica-based compound layer reacts with the OH groups and COOH groups present on the surface of the base material, or adheres better due to the presence of polar groups, so the base material-silica-based compound layer-low surface tension coating layer is strong. Can be formed.

  Examples of the compound that forms such a silica-based compound layer include polysilazane, lithium silicate, silica sol, and the like, but the present invention is not limited thereto.

  Here, in the present invention, the base material is a base material made of a base metal, a base material having a synthetic resin coating layer on the base metal plate, or ceramic particles on the surface of the synthetic resin coating layer. It is preferable to use any one of the substrates having a fine concavo-convex structure composed of ceramic particle-dispersed adhesive layers dispersed and bonded with an adhesive in a state where a part of the substrate is exposed from the adhesive layer.

  Further, in order to further ensure prevention of detachment of the ceramic particles, it is possible to thinly coat an adhesive resin on the ceramic particle-dispersed adhesive layer. Examples of such resins include phenolic resins having a functional group capable of reacting with the chemical reaction unit of the present invention in the molecule, that is, resol type or novolac type phenol resins, phenol resins and polyvinyl acetate, polyvinyl alcohol, polyvinyl formal. Polyvinyl butyral, polyvinyl acetal, nitrile rubber, chloroprene, nylon, melamine resin, epoxy resin, phenolic resin-based modified structural adhesive resin in combination with xylene resin, epoxy resin having an epoxy ring, etc. are suitable, The present invention is not limited to these.

  In order to further activate the reaction with the chemical reaction part, the surface of the adhesive resin layer may be subjected to a reaction activation treatment with a lower layer structure-forming molecule. Here, as the reaction activation treatment, means for forming OH groups on the surface of the resin layer such as plasma treatment, corona discharge treatment, and ultraviolet irradiation can be taken.

Moreover, the said base material 10 is good also as a metal base material which has a fine structure which has fine unevenness | corrugation on the surface.
Here, examples of the method for forming irregularities on the surface of the metal substrate include blasting, etching with acid, electrochemical treatment, and the like, but the present invention is not limited thereto. Examples of the material of the metal plate include stainless steel, aluminum, and iron, but are not limited thereto.

  Further, in order to efficiently perform a chemical reaction with the chemical reaction part, it is desirable to wash the surface of the metal plate before forming the low surface tension layer. As a cleaning method, a method in which the substrate surface is cleaned with clean water after general degreasing cleaning and moisture is removed by air drying or heat drying may be used.

Further, the base material may be a metal plate having a smooth surface.
Here, “smooth” means that the surface is not intentionally uneven. The surface roughness Rz is preferably less than 15 μm.

  The printed material contact member of the present invention is a coating sheet or coating layer having a base material made of resin or metal, or a composite material thereof, an ink contact portion of various printing device members, and oils other than ink, adhesives, etc. It can be applied as a non-adhesive part.

  As specific objects to which the printed material contact member of the present invention is applied, for example, the impression cylinder 103 shown in FIG. Can be mentioned. In addition to this, as for the printing press, the vacuum suction wheel 110 of the sheet-fed printing machine shown in FIG. 8, the fixed plate 122 which is the suction board of the color tone management apparatus shown in FIG. It can be applied to ink trays and the like.

  In addition to the printing press, for example, an adhesion prevention layer formed on a release material that is provided in a state of being easily and temporarily peeled off such as a transport roller of an adhesive body such as an adhesive tape, a leaf having an adhesive layer on the back surface, For example, the present invention can be applied to non-adhesive members for oils, adhesives and the like other than ink, such as non-adhesive layers of blades such as cutters.

Here, an example of a printing unit of a sheet-fed offset double-sided printing machine to which the printing medium contact member of the present invention is applied will be described with reference to FIG.
As shown in FIG. 7, the printing unit of the printing machine is equipped with a printing plate 101a, and the plate is supplied with ink from an ink supply unit (not shown) via an ink supply roller (not shown). A cylinder 101, a blanket cylinder (rubber cylinder) 102 to which ink supplied to the pattern portion of the printing plate 101 a is pressed against the plate cylinder 101, and a printing cylinder that is in pressure contact with the blanket cylinder 102 via the printing paper 104 A printing unit having a pressure cylinder (also referred to as a printing cylinder or cylinder) 103 is provided.

  When the printing paper 104 passes between the blanket cylinder 102 and the impression cylinder 103, a nip pressure generated between the blanket cylinder 102 and the impression cylinder 103 is applied, and the blanket cylinder is applied to one surface (the upper surface in the figure) 104a. Ink corresponding to the pattern is transferred from 102 and printing is performed. On the printing paper 104, ink corresponding to the corresponding pattern is transferred from the blanket cylinder 102 (not shown) to the other surface (the lower surface in the drawing) 104b on the upstream portion of the printing unit shown in the drawing, similarly to the one surface 104a. The ink transferred to the other surface 104b of the printing paper 104 is in contact with the impression cylinder 103 under the nip pressure, and the ink is extremely transferred from the other surface 104b of the printing paper 104 to the surface of the impression cylinder 103. It is easy to stick.

  By applying the printed material contact member according to the present invention to such an impression cylinder 103, the present invention has a low surface tension developing portion 12 having high ink repellency and reacts with the surface of the substrate 10. By coating with a monomolecular layer of molecules composed of the chemical reaction portion 13, an impression cylinder jacket having high ink repellency and high durability can be obtained.

  Here, in the case of an impression cylinder jacket of a sheet-fed double-sided printing machine, the compressive strength of the synthetic resin forming the synthetic resin skin covering layer as the base material is in the range of 100 to 200 MPa, and the thickness of the coating layer is A range of 50 to 100 μm is preferable. This further keeps the bond between the ceramic particle-dispersed adhesive layer and the base metal plate strong. If the compressive strength is less than 100 MPa, it cannot withstand the high surface pressure applied to the impression cylinder, and if it exceeds 200 MPa, the flexibility is difficult to obtain. If the thickness is less than 50 μm, the stress absorption effect is not sufficient, and if it exceeds 100 μm, the manufacturing and material costs increase.

  Specific synthetic resin types for forming the synthetic resin covering layer include, for example, polyethylene terephthalate, polycarbonate, nylon 6.6, polyetherimide, polyethersulfone, polyimide, polyacetal, polyphenylene sulfide, polysulfone and the like. Can be mentioned.

  Furthermore, the impression cylinder jacket of the sheet-fed double-sided printing machine preferably has a surface roughness Rz on the surface of the low surface tension coating layer in the range of 15 to 30 μm. This is a roughness range that minimizes the contact area between the impression cylinder and the paper (printing medium) sandwiched between the impression cylinder and the plate cylinder or rubber cylinder. Number. This is because if it is too fine or too rough, the contact area becomes large, or the ink easily moves to the recess, which is inappropriate.

  Furthermore, as an impression cylinder jacket of a sheet-fed double-sided printing machine, the average particle diameter of the ceramic particles is preferably in the range of 30 to 50 μm. This is a numerical value obtained in relation to the surface roughness Rz.

  Here, ceramics is selected as the material because it is rigid against compression and the surface uneven structure can be maintained even under high pressure. The ceramic is not particularly limited in the present invention, but examples include oxides such as alumina, silica, chromina, and titania, or carbides or nitrides such as at least two complex oxides, silicon carbide, and silicon nitride. It is done. Moreover, these can also be mixed and used.

  The thickness of layers other than the synthetic resin covering layer of the impression cylinder jacket having a multilayer structure thus configured is in the range of 10 to 80 μm of the ceramic particle dispersed adhesive layer, and the base layer of the ceramic particle dispersed adhesive layer only with the adhesive Is preferably in the range of 10 to 30 μm, and the base metal plate is preferably in the range of 100 to 200 μm. As a result, the jacket can be bent and can be wound around the roller core, and the roller clad with the multilayer substrate provides a surface that is durable and has high releasability.

FIG. 8 is a schematic view of a vacuum suction wheel as another example to which the printed material contact member of the present invention is applied. As shown in FIG. 8, the suction of the printing press can be stopped by applying the printing medium contact member according to the present embodiment to the surface of the suction pad 111 having the suction holes 112 of the vacuum suction wheel 110.
As a result, conventionally, with respect to the contact portion with the paper surface of the vacuum suction wheel, the installation position of the vacuum suction wheel has been adjusted by selecting a location other than the location where the paper surface is printed. By applying the contact member, the paper surface can be stopped even if the vacuum suction wheel is installed at an arbitrary position without depending on the presence or absence of printing on the paper surface.

  FIG. 9 is a schematic view of a color measuring apparatus as another example to which the printing medium contact member of the present invention is applied. As shown in FIG. 8, the color measuring device 120 includes a fixed plate 122 on which a printed material that is a measurement object is placed and temporarily adsorbed for measurement, and a measuring device 121 that measures the pattern color of the printed material. The printed material contact member is applied to the fixed plate 122.

  In this example, the measurement device 121 is a scanner device that includes a color measurement sensor 121 a and a scanning device 121 b that scans the color measurement sensor, and measures the entire surface of the printed material on the fixed plate 122. . Note that an imaging device such as a CCD may be used instead of the scanner device.

  The fixed plate 122 is provided with a large number of grooves (not shown) radially from one corner on the start side (left side in the present example) of the scanning device 121b. (Not shown). The hole temporarily fixes the printed material by a suction operation from an air chamber (not shown) provided on the back side of the fixing plate 122.

  By applying the printing medium contact member according to the present invention to such a fixed plate 122, the present invention has the low surface tension developing portion 12 having high ink repellency and reacts with the surface of the substrate 10. By covering with a monomolecular layer of molecules composed of the chemical reaction portion 13, a fixed plate having high ink repellency and high durability can be obtained.

Hereinafter, although the specific Example which shows the effect of this invention is described, this invention is not limited to these.
[Example 1]
FIG. 4 is a schematic diagram of the configuration of the printed material contact member according to the first embodiment.
As shown in FIG. 4, in this example, the average particle size is obtained by coating the polyethylene terephthalate sheet 31 having a compressive strength of 120 to 135 MPa with a thickness of about 20 μm on the polyethylene terephthalate sheet 31 by electrostatic coating. Alumina-based ceramic particles 33a having a diameter of about 55 μm were dispersed and bonded to form a first ceramic particle-dispersed coating layer 33-1 to form a first multilayer sheet 34-1. The thickness of the obtained first ceramic particle-dispersed adhesive layer 33-1 including the adhesive layer was about 60 μm.
After the sandblast treatment, the substrate 10 of SUS304 metal plate having a thickness of 100 μm having an epoxy adhesive applied to the cleaned, degreased and dried surface, and the polyethylene terephthalate sheet 31 of the first multilayer sheet 34-1 obtained above. The composite multi-layer sheet was formed by heating and adhering to the exposed surface.

  Ceramic particle-dispersed adhesive layer surface of the composite multilayer sheet in the previous period was obtained by adding 0.7 wt% acetic acid to 1.0 wt% ethanol solution of tridecafluorooctyltrimethoxysilane (GE Toshiba Silicone) And dried at 100 ° C. for 30 minutes to obtain a printed material contact member of this example.

An appropriate evaluation test was performed using the printed material contact member as an impression cylinder jacket of a printing press.
In the test, printing ink (“TOYO HY-UNITY Ai”, trade name: manufactured by Toyo Ink Co., Ltd.) was printed on a coated paper with a film thickness of 1.3 μm using a printability tester, and immediately on the roller around which the above-mentioned substrate contact member was wound. The sample was allowed to pass 5 times, and stains and white spots were evaluated by an enlarged photograph of the printed surface.
As a result, it has been found that the white spot rate is 1% or less, and it is possible to ensure a print quality equivalent to single-sided printing in which the printing surface does not contact the impression cylinder.
Further, the durability of the printed body contact member was good.

  Three reactive groups (methoxy groups) bonded to Si of the compound of this example can react with OH groups present on the surface of a substrate having a fine structure, but all methoxy groups react with the substrate. Is considered to increase the durability of the low surface tension layer because the number of bonds between the molecule and the substrate surface increases.

In addition, even when all methoxy groups cannot react with the substrate surface, methoxy groups that have not reacted with the substrate surface react with unreacted methoxy groups of neighboring molecules to form chemical bonds between the molecules. Therefore, the film strength increases.
In other words, a maximum of three chemical bonds per molecule are formed between the substrate surface and durability, or methoxy groups that could not react with the substrate surface are bonded between molecules to improve the strength of the film. This will increase durability.
Therefore, it has been found that a much higher durability can be realized than conventional contact members for printing materials in which a fluorine-based resin or silicone-based resin that does not cause chemical bonding is applied to the surface of a substrate having a fine structure. did.

[Example 2]
FIG. 5 is a schematic diagram of a configuration of the printed material contact member according to the first embodiment.
As shown in FIG. 5, in this example, the ceramic particles 33a were dispersed and adhered in Example 1, and then a phenolic resin 35 was further thinly coated thereon and dried, followed by corona discharge treatment. The second ceramic particle dispersion coating layer 33-2 was obtained. Other than this, the second multilayer sheet 34-2 was formed in the same manner as in Example 1.
The thickness of the obtained second ceramic particle-dispersed adhesive layer 33-2 was about 65 μm including the two types of adhesive layers.

Using this second multilayer sheet 34-2, a printed material contact member was produced in the same manner as in Example 1.
The printing member contact member was subjected to a proper evaluation test as an impression cylinder jacket in the same manner as in Example 1.

  As a result of the test, the white spot rate was 1% or less, the printing quality equivalent to single-sided printing in which the printing surface did not contact the impression cylinder could be ensured, and the durability of the printed material contact member was even better than Example 1. .

  In order to prevent the detachment of the ceramic particles, thin coating of the phenol resin on the ceramic particle-dispersed adhesive layer can prevent the detachment of the ceramic particles and further improve the durability of the printed material contact member.

[Example 3]
FIG. 6 is a schematic diagram of the configuration of the printing medium contact member according to the third embodiment.
As shown in FIG. 6, in this embodiment, the polyethylene terephthalate sheet 31 having a compressive strength of 120 to 135 MPa and a thickness of 75 μm is thinly coated with an epoxy resin adhesive 32 to about 20 μm, and averaged by an electrostatic coating method. Alumina ceramic particles 33a having a particle diameter of about 55 μm were dispersed and adhered. Next, polysilazane (“AQUAMICA NP110 (trade name)”, manufactured by AZ Electronic Materials Co., Ltd.) was spray coated thereon. After drying at room temperature, it was dried at 150 ° C. for 1 hour to form a silica-based compound layer to form a third ceramic particle-dispersed coating layer 33-3 to form a third multilayer sheet 34-3. The thickness of the obtained third ceramic particle-dispersed adhesive layer 33-3 was about 60 μm including the silica-based compound layer of about 1 μm.
After the sandblast treatment, the substrate 10 of a 100 μm-thick SUS304 metal plate coated with an epoxy adhesive on the cleaned, degreased and dried surface, and the polyethylene terephthalate exposed surface of the third multilayer sheet 34-3 obtained above Were stacked and heated and bonded to form a composite multilayer sheet.

  A ceramic particle-dispersed adhesive layer of a composite multilayer sheet in the previous period obtained by adding 0.7 wt% acetic acid to a 1.0 wt% ethanol solution of tridecafluorooctyltrimethoxysilane (GE Toshiba Silicone) It apply | coated to the surface and it was made to dry for 30 minutes at 100 degreeC, and it was set as the to-be-printed body contact member of this invention.

An appropriate evaluation test was performed using the printed material contact member as an impression cylinder jacket of a printing press. In the test, printing ink (“TOYO HY-UNITY Ai”, trade name: manufactured by Toyo Ink Co., Ltd.) was printed on a coated paper with a film thickness of 1.3 μm using a printability tester, and immediately on the roller around which the above-mentioned substrate contact member was wound. The sample was allowed to pass 5 times, and stains and white spots were evaluated by an enlarged photograph of the printed surface.
As a result of the test, it was found that the white spot ratio was 0.5% or less, and it was possible to ensure a print quality equivalent to single-sided printing in which the printing surface did not contact the impression cylinder.
Further, the durability of the printed body contact member was good.

The bulk of the silica-based compound layer of this example is mainly composed of silicon atoms Si and oxygen atoms O, and the surface is covered with a sufficient amount of OH groups. Therefore, it is possible to react in a state where the compound forming the low surface tension coating layer is closely packed, so that high ink repellency can be expressed.
Also, by providing the silica-based compound layer between the base material and the low surface tension coating layer, and covering the base material, the influence on the low surface tension coating layer due to the difference in the composition of the base material can be substantially eliminated. It becomes possible.
Furthermore, the silica-based compound layer reacts with the OH groups and COOH groups present on the surface of the base material, or adheres better due to the presence of polar groups, so the base material-silica-based compound layer-low surface tension coating layer is strong. Can be formed.

[Example 4]
An epoxy resin adhesive was thinly coated on a polyethylene terephthalate sheet having a compressive strength of 120 to 135 MPa and a thickness of 75 μm, and alumina ceramic particles having an average particle diameter of about 55 μm were dispersed and adhered by an electrostatic coating method. A phenolic resin was further thinly coated thereon and dried, followed by corona discharge treatment to form a fourth multilayer sheet. The thickness of the obtained ceramic particle-dispersed adhesive layer was about 60 μm including the two adhesive layers.
After the sandblast treatment, the substrate of the SUS304 metal plate having a thickness of 100 μm with the adhesive applied to the cleaned, degreased and dried surface and the polyethylene terephthalate exposed surface of the fourth multilayer sheet obtained above are overlaid and heated. A composite multilayer sheet was formed by bonding.

  A 0.1 wt% perfluorocarbon-based solvent (manufactured by Daikin Industries, Ltd.) of “OPTOOL DSX” (trade name, manufactured by Daikin Industries, Ltd.) was applied and dried at 60 ° C. for 1 hour to prepare a printed material contact member. .

  The printing member contact member was subjected to a proper evaluation test as an impression cylinder jacket in the same manner as in Example 1. The white spot ratio was 1% or less, the printing quality equivalent to single-sided printing in which the printing surface did not contact the impression cylinder could be ensured, and the durability of the printed material contact member was as good as that of Example 1.

  The compound of this example has one reactive group bonded to Si and reacts with an OH group present on the surface having a fine structure to form a strong chemical bond. Furthermore, in addition to the formation of chemical bonds with the substrate, all reacted molecules react with the reactive groups facing the substrate side, forming an orientation with the low surface tension-expressing part facing outward, and the intermolecular molecules are physically In order to attract with a strong attractive force, a stronger monomolecular film is formed than when molecules are present randomly. Therefore, than the substrate contact member to be printed only by applying a fluorine-based resin or a silicone-based resin that does not cause chemical bonding on the surface of the substrate having a fine structure (in this case, molecules are present randomly and not oriented), High durability can be realized.

  As described above, the printed material contact member according to the present invention is a monomolecular layer of a molecule having a low surface tension developing portion having high ink repellency and a chemical reaction portion that reacts with the surface of the substrate. By coating, the printed material contact member has high ink repellency and high durability, and is suitable, for example, for a member that contacts the printing paper surface of a printing machine.

It is the schematic of the to-be-printed body contact member which concerns on this Embodiment. It is another schematic diagram of the to-be-printed body contact member concerning this embodiment. It is a schematic diagram of the to-be-printed body contact member which concerns on this Embodiment. It is another schematic diagram of the to-be-printed body contact member concerning this Embodiment. FIG. 3 is a schematic configuration diagram of a printed material contact member according to the first embodiment. FIG. 5 is a schematic configuration diagram of a printed material contact member according to a second embodiment. FIG. 6 is a schematic configuration diagram of a printing material contact member according to Example 3. It is the schematic of the impression cylinder part of a printing machine. It is the schematic of a vacuum suction wheel. It is the schematic of a color measuring device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Base material 11 Low surface tension coating layer 12 Low surface tension expression part 13 Chemical reaction part 21 1st interaction (interaction with a low surface tension coating layer and a base material)
22 Second interaction (interaction between neighboring molecules)

Claims (23)

A printed material contact member having a low surface tension coating layer on the surface of a substrate,
The low surface tension coating layer comprises a monomolecular layer from a compound having at least a low surface tension developing part that comes into contact with a substrate and a chemical reaction part that interacts with the substrate surface. Printed material contact member to be printed. In claim 1,
The printed material contact member, wherein the chemical reaction part interacts with an adjacent chemical reaction part. In claim 1 or 2,
The chemical reaction part is
A printed material contact member, which is one of an epoxy group, an isocyanate group, and a group represented by formula (1).

In any one of Claims 1 thru | or 3,
The printed material contact member, wherein the low surface tension developing portion has a fluorine atom. In any one of Claims 1 thru | or 4,
The printed material contact member, wherein the density of the compound constituting the low surface tension coating layer is higher than 2 molecules / nm ² . In any one of Claims 1 thru | or 5,
A printed material contact member comprising a silica-based compound layer between the substrate and the low surface tension coating layer. In any one of Claims 1 thru | or 6,
The base material is made of a base metal,
Or a substrate having a synthetic resin coating layer on the substrate metal plate,
Alternatively, any one of the substrates having a fine concavo-convex structure formed of a ceramic particle-dispersed adhesive layer in which ceramic particles are dispersed and bonded with an adhesive in a state where a part of the particles are exposed from the adhesive layer on the surface of the synthetic resin coating layer. A printed material contact member, wherein In claim 7,
The substrate having the microstructure is a substrate having a microstructure formed by coating an adhesive resin layer capable of chemically reacting with the chemical reaction portion on the ceramic particle-dispersed adhesive layer. Printed material contact member to be printed. In claim 8,
Furthermore, it has a fine structure formed by performing the reaction activation process with the said chemical reaction part on the surface of the said adhesive resin layer, The to-be-printed body contact member characterized by the above-mentioned. In any one of Claims 1 thru | or 7,
The printed material contact member, wherein the substrate is a metal substrate having a fine structure having fine irregularities on the surface. In any one of Claims 1 thru | or 7,
The printed material contact member, wherein the substrate is a metal plate having a smooth surface.   A member for a printing apparatus, comprising the printed material contact member according to claim 1. In claim 12,
The printing device member, wherein the printing device member is an impression cylinder, a sample stage, a vacuum suction wheel, or a color measuring device. A method for producing a printed material contact member having a low surface tension coating layer on the surface of a substrate,
A compound having at least a low surface tension developing part and a reaction part chemically bonded to the base material surface is provided on the surface of the base material, the reaction part and the base material are reacted,
A method for producing a printed material contact member, comprising forming a monomolecular layer on a surface of the substrate. In claim 14,
The chemical reaction part is
A method for producing a printed material contact member, which is one of an epoxy group, an isocyanate group, and a group represented by formula (1).

In claim 14 or 15,
The said low surface tension expression part has a fluorine atom, The manufacturing method of the to-be-printed body contact member characterized by the above-mentioned. In any one of Claims 14 thru | or 16,
The method for producing a printing member contact member, wherein the density of the compound constituting the low surface tension coating layer is higher than 2 molecules / nm ² . In any one of Claims 14 thru | or 17,
A method for producing a printed material contact member, comprising a silica-based compound layer between the substrate and the low surface tension coating layer. In any one of claims 14 to 18,
The base material is made of a base metal,
Or a substrate having a synthetic resin coating layer on the substrate metal plate,
Alternatively, any one of the substrates having a fine concavo-convex structure formed of a ceramic particle-dispersed adhesive layer in which ceramic particles are dispersed and bonded with an adhesive in a state where a part of the particles are exposed from the adhesive layer on the surface of the synthetic resin coating layer. A method for producing a printed material contact member, wherein: In claim 19,
The substrate having the microstructure is a substrate having a microstructure formed by coating an adhesive resin layer capable of chemically reacting with the chemical reaction portion on the ceramic particle-dispersed adhesive layer. A method for manufacturing a printed material contact member. In claim 20,
Furthermore, it has the microstructure which gives the surface of the said adhesive resin layer the reaction activation process with the said chemical reaction part, The manufacturing method of the to-be-printed body contact member characterized by the above-mentioned. In any one of claims 14 to 18,
The method for producing a printed material contact member, wherein the substrate is a metal substrate having a fine structure having fine irregularities on a surface. In any one of claims 14 to 18,
The method for producing a printed material contact member, wherein the substrate is a metal plate having a smooth surface.

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