JP4473229B2 - Decorative building board - Google Patents

Description

  The present invention relates to a decorative building board provided with a desired pattern or pattern by ink-jet coating (including printing).

  2. Description of the Related Art Conventionally, various types of decorative building boards to which a desired pattern has been applied by inkjet coating have been provided (see, for example, Patent Document 1). The example shown in FIG. 8 is an example, and this decorative building board is formed as follows. That is, after forming the receiving layer 2 on the surface of the base material 1 such as a cement board, and forming the inkjet coating layer 3 by inkjet coating on the surface of the receiving layer 2, a decorative building board as shown in FIG. It can be obtained. And in such a decorative building board, a plurality of concave grooves 4, 4... Are formed on the surface of the substrate 1, and a gap 5 between adjacent concave grooves 4, 4 is formed as a convex strip 5, thereby making a decorative building. The ink jet coating surface of the plate is formed as an uneven surface to give a three-dimensional feeling.

However, in order to obtain a decorative building board having a small three-dimensional effect only with the grooves 4 and the ridges 5 and having a high design property, a material with a further three-dimensional effect has been desired.
JP 2004-60241 A

  This invention is made | formed in view of said point, and it aims at providing the decorative building board with a large three-dimensional effect and high designability.

  The decorative building board of the present invention forms a plurality of concave grooves 4 on the surface of the base material 1, and forms between the adjacent concave grooves 4, 4 as convex stripes 5. 20 and a decorative recess 21 are formed, and the surface of the base material 1 is subjected to inkjet coating so that the resolution decreases in the order of the decorative convex portion 20, the decorative concave portion 21, and the concave groove 4. It is.

  In the present invention, a plurality of decorative convex portions 20, 20... Can be formed on the surface of the ridge 5, and a portion other than the decorative convex portion 20 can be formed as the decorative concave portion 21.

  In the present invention, a plurality of decorative recesses 21, 21... Can be formed on the surface of the ridge 5, and a portion other than the decorative recess 21 can be formed as the decorative convex portion 20.

  In the present invention, by gradually lowering the resolution of the inkjet coating layer 3 in the order of the decorative convex portion 20, the decorative concave portion 21, and the concave groove 4, the pattern or pattern formed by the inkjet coating layer 3 is changed to the decorative convex portion 20, It can be gradually blurred in the order of the decorative concave portion 21 and the concave groove 4. Accordingly, the pattern or pattern formed by the ink jet coating layer 3 appears to protrude to the surface side at the portion of the decorative recess 21 from the groove 4, and the surface side at the portion of the decorative convex portion 22 than the makeup concave portion 21. As a result, in addition to the provision of a three-dimensional effect by the concave grooves 4 and the ridges 5, a three-dimensional effect by the decorative convex portion 20 and the decorative concave portion 21 and a three-dimensional effect due to a change in the resolution of the inkjet coating are obtained. A decorative building board having a large three-dimensional effect and a high design can be formed.

  Embodiments of the present invention will be described below.

  As shown in FIG. 2, the decorative building board according to the present invention is formed by laminating a receiving layer 2 formed of a water-based paint or the like and an ink-jet coating layer 3 formed of a water-based ink or the like on the surface of the base material 1 in this order. It is formed by. The pattern or pattern is formed by the inkjet coating layer 3.

  The base material 1 may be either an inorganic material such as a ceramic base material or a metal base material, or an organic material such as a resin base material. The exterior material of the ceramic base material is used for applications such as tiles and outer wall materials. The ceramic base material is prepared by blending an inorganic filler, a fibrous material, etc. into a hydraulic glue used as a raw material for an inorganic hardened body, and curing and curing it. As a hydraulic glue, Although not particularly limited, for example, one or more selected from Portland cement, blast furnace cement, blast furnace slag, calcium silicate, gypsum and the like can be used. In addition, as the inorganic filler, fly ash, microsilica, silica sand, etc., and as the fibrous material, inorganic fibers such as pulp and synthetic fibers, and metal fibers such as steel fibers are used alone or in combination. Can be used. Molding can be performed by methods such as extrusion molding, cast molding, papermaking molding, press molding, etc., and after molding, ceramics used as an exterior material by performing autoclave curing, steam curing, room temperature curing as necessary A system substrate can be produced. The surface of the exterior material of the ceramic base material produced in this way is sealed with a solvent-based, water-soluble or emulsion-based sealer to adjust the variation in suction into the surface of the base material 1. Good. The sealer used is not particularly limited, but acrylic or latex type sealers can be used. An acrylic or latex organic coating film may be formed on the sealer in order to improve design and durability. In addition, as the base material 1, for example, an inorganic board such as a flexible board, a calcium silicate board, a gypsum slag perlite board, a wood piece cement board, a precast concrete board, an ALC board, or a gypsum board can be used.

  The upper surface (surface), which is the painted surface of the substrate 1 used in the present invention, is formed as a concave / convex surface by the concave grooves 4 and the convex strips 5. A plurality of the concave grooves 4 are formed substantially in parallel, and a space between the adjacent concave grooves 4 and 4 is formed as a ridge 5. Moreover, the depth dimension of the concave groove 4 is 1.5 to 15 mm, the upper surface opening width of the concave groove 4 is 2 to 100 mm, and the interval between the adjacent concave grooves 4 and 4 (width dimension of the ridge 5) is 5 to 500 mm. However, the present invention is not limited to this. Further, a plurality of decorative convex portions 20, 20... Are provided on the surface (upper surface) of the ridge 5 with a space therebetween, and a portion other than the decorative convex portion 20 on the surface of the ridge 5 is a decorative concave portion 21. Is formed. The bottom surface of the decorative recess 21 is formed as a textured surface (matte surface) made of fine irregularities. In the present invention, the groove 4, the decorative recess 21, and the matte surface can be formed by pressing a mold against the surface of the flat substrate 1. Moreover, the depth dimension of the makeup | decoration recessed part 21 formed shallower than the ditch | groove 4 can be 0.5-10 mm.

  And in manufacturing a decorative building board, first, it is not essential to the surface of the base material 1 (the side surface and bottom surface of the groove 4 and the top surface of the ridge 5) as described above, but generally a sealer (illustrated). The receiving layer 2 is formed after applying (omitted). The receiving layer 2 is a layer necessary for fixing the ink of the inkjet coating layer 3 formed thereon, and is formed of a water-based paint. In this way, the environmental load can be reduced by forming the receiving layer 2 with a water-based paint.

As the water-based paint, an acrylic resin paint based on an acrylic emulsion or an acrylic silicon resin paint based on an acrylic silicon emulsion can be used. It is preferable to mix at least one of extender pigments and hygroscopic resins in the water-based paint. Thereby, the fixing property of the ink can be improved, and the coloring property can also be improved. Here, silica, alumina, aluminum hydroxide, barium sulfate, porous silica, diatomaceous earth, or the like can be used as the extender pigment, and vinyl acetate, urethane polymer, acrylic polymer, polyvinyl alcohol can be used as the hygroscopic resin. Ink-absorbing polymers such as can be used. The water-based paint can also contain a color pigment such as titanium oxide, iron oxide, or carbon black. Moreover, when forming the receiving layer 2 with a water-based coating material, it is preferable to apply | coat a water-based coating material to the surface of the base material 1 with the application amount of 30-200 g / m < ² > * wet. The aqueous paint can be applied using a spray gun, roll coater, flow coater, curtain coater, or the like.

  And the inkjet coating layer 3 is formed by carrying out inkjet printing of the water-based ink on the surface of the receiving layer 2. FIG. Then, a decorative building board as shown in FIG. 1 can be obtained. Here, as an ink jet apparatus for ink jet printing, for example, the one shown in FIG. 3 can be used. This ink jet apparatus includes a painting nozzle head 8 provided with an ejection nozzle 7, a paint supply tank 9 for supplying aqueous ink to the ejection nozzle 7 of the painting nozzle head 8, and ejection of aqueous ink from the ejection nozzle 7 of the painting nozzle head 8. The inkjet coating machine 11 provided with the coating control system 10 to be controlled, and the transport conveyor 12 that transports the substrate 1 are formed.

  The coating nozzle head 8 is formed of four types of coating nozzle heads 8y, 8c, 8m, and 8k that eject yellow, cyan, magenta, and black water-based inks so that full-color printing can be performed. It is. Similarly, the paint supply tank 9 is also composed of four types. The paint supply tank 9y supplying yellow aqueous ink is applied to the coating nozzle head 8y, and the paint supply tank 9c supplying cyan aqueous ink is applied to the coating nozzle head. 8c, the paint supply tank 9m for supplying magenta water-based ink is connected to the coating nozzle head 8m, and the paint supply tank 9k for supplying black water-based ink is connected to the coating nozzle head 8k. The coating nozzle heads 8y, 8c, 8m, and 8k are arranged along the transport direction of the substrate 1.

  The painting control system 10 includes various CPUs, ROMs, RAMs, and the like, and includes a painting data creation unit, a painting control unit, an injection nozzle control unit, and the like. The painting data creation unit inputs and stores the color pattern data obtained by scanning the original image with a scanner or the like, and the painting control unit paints the color pattern data corresponding to the substrate 1 to be painted. A control signal is output from the data creation unit to the ejection nozzle control unit based on the color pattern data. The spray nozzle controller is connected to the spray nozzles 7 of the coating nozzle heads 8y, 8c, 8m, and 8k, and controls each spray nozzle 7 based on a control signal input from the spray nozzle controller. It is. Each of the injection nozzles 7 is configured to perform injection or stop the injection by, for example, a piezo control method or a method of irradiating and controlling laser light to the photothermal exchange element. By controlling, the ejection and stop of each of the yellow, cyan, magenta, and black water-based inks can be individually controlled, and coating by full-color printing corresponding to the color pattern can be performed.

  The conveyance conveyor 12 is arrange | positioned under the inkjet type coating machine 11, and can be formed with a belt conveyor.

  A plurality of (for example, 30) single heads 16 are attached to the lower surface of the coating nozzle head 8 in a line in the longitudinal direction of the coating nozzle head 8 as shown in FIG. The single head 16 is formed in a rectangular shape on the bottom surface, and a large number of jet nozzles 7 are formed on the bottom surface of the single head 16. The spray nozzles 7 are arranged in the longitudinal direction of the single head 16 at a predetermined constant interval. In the embodiment of FIG. 5, the spray nozzles 7 are provided in four rows on the single head 16. By attaching a plurality of single heads 16 provided with the spray nozzles 7 to the coating nozzle head 8 in the longitudinal direction in this way, a large number of spray nozzles 7 are arranged in the longitudinal direction of the coating nozzle head 8. Can be provided. Here, the single head 16 is attached to the coating nozzle head 8 with its longitudinal direction inclined at a predetermined angle with respect to the feed direction of the base material 1. The pitch of the adjacent injection nozzles 7 in the direction perpendicular to the feed direction of 1 (the width direction of the base material 1) is reduced so that coating can be performed with high density dpi.

  Then, when performing inkjet coating with the inkjet apparatus formed as described above, first, the base material 1 on which the receiving layer 2 is formed is introduced onto the transport conveyor 12. The introduced base material 1 is sent as it is and passes under the coating nozzle heads 8y, 8c, 8m and 8k of the ink jet type coating machine 11 in order. In this way, the inkjet coating layer 3 is formed on the surface of the receiving layer 2 by spraying the water-based ink from the coating nozzle heads 8y, 8c, 8m, and 8k while applying the substrate 1 by the conveyor 12. However, a pattern or a pattern can be formed by the inkjet coating layer 3. The base material 1 coated in this way is further sent and carried out to the next process.

  Here, in the present invention, it is preferable to perform inkjet printing on the surface of the receiving layer 2 with a water-based ink in a state where 4 to 20% by weight of volatile matter remains in the receiving layer 2. Since both the ink-jet coating layer 3 is water-based, the familiarity of the water-based ink with respect to the receiving layer 2 is improved, and good color development can be obtained. And since the inkjet coating layer 3 can be formed in this surface even if the receiving layer 2 is not fully dried, the manufacturing efficiency of a decorative building board can be obtained highly. However, if the volatile content remaining in the receiving layer 2 is less than 4% by weight, the water-based ink has poor absorbability and may repel the water-based ink. Conversely, it remains in the receiving layer 2. If the volatile content exceeds 20% by weight, the ink is excessively wet and the water-based ink may bleed, and the color developability is poor in either case where the volatile content is too little or too much. There is a risk. Note that the volatile matter means a large amount of water and a small amount of solvent soluble in water.

  In the decorative building board formed as described above, by forming the inkjet coating layer 3 with water-based ink on the surface of the receiving layer 2 formed with water-based paint, the receiving layer 2 is formed with solvent-based paint. Compared with the case where it forms, favorable color developability can be obtained. Conventionally, since the water-based ink is ink-jet printed on the surface of the receiving layer 2 in a completely dry state, the water-based ink is rebounded on the surface of the receiving layer 2 in this case. The nozzle array 8 may be contaminated with ink. However, in the present invention, since ink-jet printing is performed in a state where 15% by weight or more of the volatile matter remains in the receiving layer 2, the water-based ink is captured by the receiving layer 2 in an undried state, and the water-based ink is captured. Ink splashing can be suppressed, and as a result, contamination of the nozzle array 8 with aqueous ink can be prevented.

  In the present invention, a pattern or a pattern is formed by the ink jet coating layer 3 as described above. The ink jet coating layer 3 is composed of the decorative convex portion 20, the decorative concave portion 21, the side surface and the bottom surface of the concave groove 4. In this order, the resolution is reduced. Here, the resolution refers to the density of ink dots per unit length. For example, the resolution of the inkjet coating layer 3 in the decorative convex portion 20 is set to 100 to 600 dpi to form a high resolution region, and the inkjet coating in the decorative concave portion 21 is performed. The resolution of the layer 3 can be 50 to 300 dpi to be a medium resolution region, and the resolution of the ink jet coating layer 3 on the side and bottom surfaces of the groove 4 can be 10 to 150 dpi to be a low resolution region. In this way, by reducing the resolution of the inkjet coating layer 3 in the order of the decorative convex portion 20, the decorative concave portion 21, and the concave groove 4, the resolution is made the same in all of the decorative convex portion 20, the decorative concave portion 21, and the concave groove 4. In addition, it can be emphasized that the makeup concave portion 21 is recessed more than the makeup convex portion 20 and visually appears far away, and the concave groove 4 is visually depressed because it is recessed more than the makeup concave portion 21 and the makeup convex portion 20. The surface of the decorative building board can be made high in depth and deep.

  In the present invention, the resolution of the decorative convex portion 20, the decorative concave portion 21, and the concave groove 4 is made different by changing one or both of the ink dot pitch and the ink dot diameter of the inkjet coating layer 3. be able to. That is, by increasing the ink dot pitch in the order of the decorative convex portion 20, the decorative concave portion 21, and the concave groove 4, the resolution can be lowered in this order, and the decorative convex portion 20, the decorative concave portion 21, and the concave groove. By increasing the ink dot diameter in the order of 4, the resolution decreases in this order. For example, the ink dot pitch in the groove 4 can be 150 to 500 μm, the ink dot pitch in the decorative recess 21 can be 40 to 160 μm, and the ink dot pitch in the decorative protrusion 20 can be 10 to 80 μm. The diameter can be 5 to 20 μm, the ink dot diameter in the decorative concave portion 21 can be 3 to 10 μm, and the ink dot diameter in the decorative convex portion 20 can be 0.5 to 5 μm. These numerical values are the depth dimensions of the concave groove 4. It can be set as appropriate according to the height difference between the groove 4 and the protrusion 5 and the upper surface opening width dimension of the groove 4.

  In the present invention, as a method of changing the ink dot pitch as described above, as shown in FIG. 4, a single coating nozzle head 8 is provided with a large number of single heads 16, and as shown in FIG. Since a large number of ejection nozzles 7 are formed in each single head 16, for example, it is possible to control the ejection nozzles 7 that eject ink and those that do not eject ink. That is, the ink jet coating layer 3 is formed using only a part of the large number of spray nozzles 7 in the concave groove 4 portion, and the ink jet coating is performed using more spray nozzles 7 than the concave grooves 4 in the decorative recess 21 portion. The layer 3 is formed, and the ink jet coating layer 3 is formed by using all of the spray nozzles 7 or a larger number of spray nozzles 7 than the decorative recesses 21 in the decorative convex portion 20. In addition, by using a plurality of inkjet devices having different pitches of spray nozzles 7 formed on one coating nozzle head 8, the inkjet coating layer 3 in the grooves 4 is coated with an inkjet device having a wide pitch of spray nozzles 7. The inkjet coating layer 3 is applied to the decorative recess 21 with an inkjet device having a narrower pitch of the spray nozzles 7, and the inkjet coating layer 3 is applied to the decorative projection 20 with an inkjet device having a narrower pitch of the spray nozzles 7. Can be done.

  In the present invention, the ink dot diameter can be changed as described above, for example, by controlling the ink droplet amount (volume) ejected from the ejection nozzle 7 to increase or decrease. In controlling the appropriate amount of ink ejected from the ejection nozzle 7, for example, the voltage and waveform of a control signal input to the piezoelectric element (piezo element, etc.) of the ejection nozzle 7 from the ejection nozzle control unit are controlled to control the piezoelectric element. This can be done by adjusting the amount of expansion / contraction. In the coating control system 10, the conveyance speed of the base material 1 and the distance between the spray nozzle 7 and the base material 1 are comprehensively controlled so that the groove 4 has less liquid than the decorative recess 21 of the protrusion 5. Ink droplets are ejected in the amount of drops, and an appropriate amount of ink particles smaller than the cosmetic convex portion 20 are ejected to the decorative concave portion 21 of the ridge 5. In addition, by using a plurality of ink jet devices having different diameters of the spray nozzles 7 formed on one coating nozzle head 8, the ink jet paint layer 3 in the concave grooves 4 is coated with an ink jet device having a large diameter of the spray nozzles 7. The inkjet coating layer 3 is applied to the decorative recess 21 with an inkjet device having a smaller diameter of the spray nozzle 7, and the inkjet coating layer 3 is applied to the decorative projection 20 with an inkjet device having a smaller diameter of the spray nozzle 7. Can be done.

  6 and 7 show another embodiment. In the embodiment shown in FIG. 1, a plurality of decorative convex portions 20, 20... Are provided on the surface of the ridge 5, and a portion other than the decorative convex portion 20 is formed as a decorative concave portion 21 on the surface of the ridge 5. However, in the decorative building board shown in FIG. 6, a plurality of decorative recesses 21, 21... Are formed at intervals on the surface of the ridge 5, and portions other than the makeup recesses 21 on the surface of the ridge 5 are makeup. The protrusion 20 is formed. Other configurations are the same as those in FIG.

  In the present invention, the inkjet coating layer 3 may be formed so as to be continuous over the entire surface of the substrate 1 or may be formed discontinuously and partially on the surface of the substrate 1.

It is an example of embodiment of this invention and is a partial schematic perspective view. It is a fragmentary sectional view same as the above. It is a schematic front view which shows an example of the inkjet apparatus used for manufacture of this invention. It is the schematic which shows an example of the coating nozzle head of the inkjet apparatus used for manufacture of this invention. It is the schematic which shows an example of the nozzle single-piece | unit head provided in the coating nozzle head same as the above. It is a partial perspective view which shows other embodiment same as the above. It is a fragmentary sectional view same as the above. It is general | schematic sectional drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base material 4 Groove | groove 5 Projection 20 Makeup convex part 21 Makeup concave part

Claims (3)

  Forming a plurality of concave grooves on the surface of the substrate and forming between the adjacent concave grooves as convex stripes, forming decorative convex portions and decorative concave portions on the surface of the convex stripes, decorative convex portions, decorative concave portions, A decorative building board, wherein the surface of a base material is subjected to ink-jet coating so that the resolution decreases in the order of the grooves.   The decorative building board according to claim 1, wherein a plurality of decorative convex portions are formed on the surface of the convex stripes, and a portion other than the decorative convex portions is formed as a decorative concave portion.   The decorative building board according to claim 1, wherein a plurality of decorative recesses are formed on the surface of the ridge, and a portion other than the decorative recess is formed as a decorative protrusion.