JP2007196197A - Decorative construction plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative construction plate having a pattern with a natural sense and capable of making a portion inconspicuous even if repairing is applied to the pattern. <P>SOLUTION: In the decorative construction plate, the pattern 6 is formed by performing ink jet printing on a surface of a base material 1 formed with a recession part 4 and a projection part 5. The pattern 6b formed on the projection part 5 is more unclear than the pattern 6a formed on the recession part 4. Even if repairing of a profile shape and repairing of color variation are applied to the pattern 6b of the projection part 5, the portion can be made unclear and inconspicuous. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

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

  2. Description of the Related Art Conventionally, various types of decorative building boards on which a desired pattern is applied by ink jet printing have been provided (see, for example, Patent Document 1). The example shown in FIG. 5 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 then forming the ink jet printing layer 3 by ink jet printing on the surface of the receiving layer 2, a decorative building board as shown in FIG. It can be obtained.

  However, in the case where a plurality of concave portions 4 and convex portions 5 are formed adjacent to each other on the surface of the base material 1, the pattern 6 that continues across the concave portions 4 and the convex portions 5 is formed by the inkjet printing layer 3. When formed, the pattern 6 becomes clear in the portion of the convex portion 5, but the pattern 6 becomes unclear in the portion of the concave portion 4. As described above, the reason why the pattern 6 becomes unclear in the concave portion 4 is that the depth of the concave portion 4 is greater in the ink reaching the concave portion 4 than in the ink reaching the convex portion 5 when the ink is ejected from the nozzles of the ink jet apparatus. Since the flight distance increases by the amount, the ink reaching the recess 4 is more likely to be affected by the airflow and the like, and it is considered that the ink does not easily reach the desired position of the recess 4.

When the pattern 6 in the convex part 5 is clearer than the pattern 6 in the concave part 4 in this way, when the pattern 6 is a brick, tile, wood grain, or the like, the natural feeling is not expressed and is artificial. There was a problem. Moreover, when the pattern 6 in the convex part 5 is clearer than the pattern 6 in the concave part 4, when the pattern 6 is repaired in the convex part 5, the repaired part is conspicuous and the appearance deteriorates. was there.
JP 2004-60241 A

  The present invention has been made in view of the above points, and provides a decorative building board that has a design with a natural feeling and that can be made inconspicuous even if the design is repaired. It is for the purpose.

  The decorative building board of the present invention is a decorative building board in which the pattern 6 is formed by ink-jet printing on the surface of the base material 1 on which the concave portion 4 and the convex portion 5 are formed. It is characterized by being unclear than the pattern 6a formed in the recess 4.

  In the present invention, the resolution of the picture 6 is 30 to 600 dpi, and the resolution of the picture 6b formed on the convex part 5 and the resolution of the picture 6a formed on the concave part 4 are (the picture 6b formed on the convex part 5 Resolution) / (resolution of the pattern 6a formed in the recess 4) = 1/2 to 1/20.

  Further, in the present invention, the ink discharge amount is 2 to 20 picoliters per dot, and the ink discharge amount of the pattern 6b formed on the convex portion 5 and the ink discharge amount of the pattern 6a formed on the concave portion 4 are , (Ink discharge amount of the pattern 6b formed on the convex portion 5) / (ink discharge amount of the pattern 6a formed on the concave portion 4) = 4/5 to 1/10.

  In the present invention, in order to make the picture 6b formed on the convex part 5 unclearer than the picture 6a formed on the concave part 4, the outline and color change of the picture 6b formed on the convex part 5 are blurred without being clarified. The pattern 6b has a natural feeling, and even if the pattern 6b of the convex portion 5 is repaired, the portion can be made unclear and inconspicuous.

  Hereinafter, the best mode for carrying out the present invention will be described.

  As shown in FIG. 1, 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 printing 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 6 is formed by the ink jet printing 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, autoclave curing, steam curing, room temperature curing as necessary, and ceramics used as exterior materials 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 surface which becomes the printing surface (painted surface) of the base material 1 used in the present invention is formed as a concave and convex surface by the concave portions 4 and the convex portions 5. For example, the concave portion 4 can be formed in a groove shape, and the convex portion 5 can be formed in a protrusion. Moreover, the recessed part 4 and the convex part 5 can be formed in multiple numbers. Moreover, although the depth dimension of the recessed part 4 can be 3-15 mm and the upper surface opening width of the recessed part 4 can be 4-40 mm, it is not limited to this.

  And in manufacturing a decorative building board, although it is not essential first on the surface of the base material 1 (the side surface and bottom surface of the recessed part 4, and the top surface of the convex part 5), 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 ink jet printing 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 by the coating 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.

  Then, an inkjet printing layer 3 is formed by inkjet printing of aqueous ink on the surface of the receiving layer 2. Then, a decorative building board as shown in FIG. 1 can be obtained. Here, as an inkjet apparatus for inkjet printing, for example, the one shown in FIG. 2 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 predetermined constant intervals. In the embodiment of FIG. 4, 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.

  And when performing inkjet printing with the inkjet apparatus formed as mentioned above, the base material 1 in which the receiving layer 2 was formed is first introduce | transduced on the conveyance conveyor 12. FIG. 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 printing 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 base material 1 on the conveyor 12. The pattern 6 can be formed by the ink jet printing 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 inkjet printing layer 3 and the ink-jet printing layer 3 are water-based, the familiarity of the water-based ink with respect to the receiving layer 2 is improved, and good color developability can be obtained. Moreover, even if the receiving layer 2 is not sufficiently dried, the ink jet printing layer 3 can be formed on this surface, so that the production efficiency of the decorative building board can be increased. However, when 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 ooze out. 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, the ink-jet printing layer 3 is formed with a water-based ink on the surface of the receiving layer 2 formed with a water-based paint, whereby the receiving layer 2 is formed with a solvent-based paint. Compared with the case where it forms, favorable color developability can be obtained. Further, conventionally, since the water-based ink is inkjet-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, There is a possibility that the nozzle array 8 is contaminated with ink. However, in the present invention, since ink-jet printing is performed in a state in which 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, Ink splashing can be suppressed, and as a result, contamination of the nozzle array 8 with aqueous ink can be prevented.

  And in 1st embodiment of this invention, the pattern 6b formed in the convex part 5 is made into the low resolution the pattern 6b formed in the convex part 5 rather than the pattern 6a formed in the recessed part 4, and the pattern formed in the concave part 4 It is made to be smeared (outline and color change are blurred, etc.) than 6a. That is, in the present invention, the resolution of the picture 6 is 30 to 600 dpi, but the picture 6b formed on the convex part 5 has a low resolution, and the picture 6a formed on the concave part 4 has a high resolution. 5, the difference (ratio) between the resolutions of the pictures 6a and 6b is (resolution of the picture 6b formed on the convex part 5) / (resolution of the picture 6a formed on the concave part 4) = 1/2 to 1/20. To meet. This relationship can be set as appropriate according to the depth dimension of the recess 4 (the difference in height between the recess 4 and the protrusion 5), the upper surface opening width dimension of the recess 4, and the like. It may be difficult to obtain. The high-resolution picture 6a is formed in the portion from the side surface (slope) 4a to the bottom face 4b of the recess 4, and the low-resolution picture 6b is formed on the top surface of the convex part 5. (Except for both portions of the side surface 4a and the bottom surface 4b).

  Thus, in the present invention, the ink dot pitch of the pattern 6a in the concave portion 4 is formed more densely than the ink dot pitch of the pattern 6b in the convex portion 5, and the resolution between the pattern 6a in the concave portion 4 and the pattern 6b in the convex portion 5 is set. It is made different so as to satisfy the above relationship. As a method of varying the resolution by changing the ink dot pitch of the patterns 6a and 6b, as shown in FIG. 3, a single coating nozzle head 8 is provided with a large number of single heads 16, which are shown in FIG. As described above, since each of the single heads 16 is formed with a large number of ejection nozzles 7, 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 printing layer 3 is formed by using only a part of the large number of jet nozzles 7 in the convex portion 5 and the number of all the large number of jet nozzles 7 or a larger number than the concave portion 5 in the concave portion 4. The inkjet printing layer 3 is formed using the injection nozzle 7. In addition, by using a plurality of inkjet devices having different pitches of the spray nozzles 7 formed on one coating nozzle head 8, the inkjet print layer 3 is printed on the convex portion 5 and sprayed by the inkjet devices having a wide pitch of the spray nozzles 7. It is possible to perform printing of the inkjet printing layer 3 in the recesses 4 with an inkjet device having a narrow pitch of the nozzles 7.

  And in 1st embodiment of this invention, since the pattern 6b formed in the convex part 5 is made indistinct rather than the pattern 6a formed in the recessed part 4, the outline of the pattern 6b formed in the convex part 5, a color change, etc. The pattern 6b has a natural feeling, and the pattern 6b of the convex portion 5 is conspicuous by making the portion unclear even if the contour shape is repaired or the color change is repaired. It is possible to prevent the deterioration of the appearance.

  In the second embodiment of the present invention, the ink discharge amount for forming the pattern 6 is 2 to 20 picoliters (pl) per dot, more preferably 4 to 15 picoliters, The ink discharge amount of the pattern 6b formed in the portion 5 and the ink discharge amount of the pattern 6a formed in the recess 4 are (ink discharge amount of the pattern 6b formed in the protrusion 5) / (ink of the pattern 6a formed in the recess 4). (Discharge amount) = 4/5 to 1/10 (ratio) is satisfied. This relationship can be set as appropriate according to the depth dimension of the recess 4 (the height difference between the recess 4 and the protrusion 5), the opening width dimension of the upper surface of the recess 4, and the like. It may be difficult to obtain. The resolution of the picture 6 is 30 to 600 dpi, but the picture 6b formed on the convex part 5 is less sharp than the picture 6a formed on the concave part 4 due to the above relationship (such as a blurred outline or color change). It is a thing. The pattern 6a having a large ink discharge amount is formed from the side surface (slope) 4a to the bottom surface 4b of the recess 4, and the pattern 6b having a small ink discharge amount is formed. This is the top surface of the convex portion 5 (other than both the side surface 4a and the bottom surface 4b).

  In the present invention, in addition to the above, the difference between the dot pitch (density) of the ink of the pattern 6a formed on the concave portion 4 and the dot pitch of the ink of the pattern 6b formed on the convex portion 5 is 4/5 to 1/5. It is preferable. Moreover, it is preferable that the difference between the dot diameter of the ink of the pattern 6a formed on the concave portion 4 and the dot diameter of the ink of the pattern 6b formed on the convex portion 5 is 1/2 to 1/5. For example, when the ink dot diameter of the pattern 6 a in the concave portion 4 is 2 to 10 μm, the ink dot diameter of the pattern 6 b in the convex portion 5 can be 4 to 20 μm.

  In the present invention, the images 6a and 6b formed by the ink jet printing layer 3 as described above may be continuously formed between the adjacent concave portion 4 and convex portion 5, It may be formed independently without being continuous over the adjacent recessed part 4 and the convex part 5. FIG. Moreover, in this invention, you may form the inkjet printing layer 3 which forms the pattern 6 so that it may continue over the whole surface of the base material 1, and it forms in the surface of the base material 1 discontinuously. May be.

It is a schematic sectional drawing which shows an example of embodiment of this invention. It is a schematic front view which shows an example of the inkjet apparatus used by this invention. It is the schematic which shows an example of the coating nozzle head of the inkjet apparatus used by 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 schematic sectional drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base material 4 Concave part 5 Convex part 6 Picture 6a Picture 6b Picture

Claims (3)

  In a decorative building board in which a pattern is formed by ink-jet printing on the surface of a base material on which a concave portion and a convex portion are formed, the pattern formed on the convex portion is less sharp than the pattern formed on the concave portion. Make-up construction board.   The resolution of the picture is 30 to 600 dpi, and the resolution of the picture formed on the convex part and the resolution of the picture formed on the concave part are (resolution of the picture formed on the convex part) / (resolution of the picture formed on the concave part) = 1. The decorative building board according to claim 1, wherein the decorative building board is / 2 to 1/20. The ink discharge amount is 2 to 20 picoliters per dot, and the ink discharge amount of the pattern formed on the convex portion and the ink discharge amount of the pattern formed on the concave portion are (the ink discharge amount of the pattern formed on the convex portion). 2. The decorative building board according to claim 1, wherein / (ink discharge amount of the pattern formed in the concave portion) = 4/5 to 1/10.

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