WO2020175270A1

WO2020175270A1 - Printer, printing method, for-printing media, method for manufacturing foamed printed article, and inkjet printing device

Info

Publication number: WO2020175270A1
Application number: PCT/JP2020/006511
Authority: WO
Inventors: 佳美山田; 礼果横道
Original assignee: 株式会社ミマキエンジニアリング
Priority date: 2019-02-28
Filing date: 2020-02-19
Publication date: 2020-09-03

Abstract

Provided is a printer, etc., with which after foaming, there is less difference between colors of an image printed in a foaming first area and a second area that does not foam more than the first area, regardless of the colors originally being the same.　The problem described above is resolved by a printer and a printing method with which an image is printed with colored ink on a foaming media before foaming on the basis of image data representing the image, a first section that foams and a second section that does not foam more than the first section are set on the foaming media, and the amount of colored ink discharged during printing of a first image printed on the first section of the image and the amount of colored ink discharged during printing of a second image printed on the second section are caused to be different so that the first image and the second image are closer to the same color after the foaming of the foaming media than before the foaming.

Description

\¥0 2020/175270 1 ?＜: 17 2020/006511 Clarification

Title of invention:

Printer, printing method, printing medium, method for producing expandable printed matter, and inkjet printing apparatus

Technical field

The present invention relates to a printer such as an inkjet printer, a printing method using the inkjet printer, a printing medium, a method for producing a foamed printed matter, and an inkjet printing apparatus.

Background technology

[0002] Conventionally, a foamed product (wallpaper or the like) in which irregularities due to foaming are formed is known. As a method for producing such a foamed product, Japanese Patent Application No. 20 1 8 — 2 1 7 2 4 7 discloses that a foaming media containing a foaming layer containing a chemical foaming agent and a base material, a foaming suppression ink and a colored ink. Disclosed is a method for producing a foamed product in which a desired uneven pattern and an image are formed by printing and after foaming the foamed medium.

[0003] A sheet having an uneven pattern on the surface of a foamed sheet is widely used as a cushion floor or wall paper. As a method of manufacturing such a sheet, there is a chemical embossing method. The chemical embossing method prepares a foaming sheet in which a resin is mixed with a chemical foaming agent that foams by heat, applies a foaming inhibitor only to specific areas of the foaming sheet to suppress foaming, and then the sheet. By heating, the area not coated with the foam suppressor is expanded to form a convex portion, and the coated area is formed as a concave portion to provide an uneven pattern. Foam suppressor is applied by gravure printing, orally screen printing! ^, flexo stamp! ^, Inkjet printing is used.

Summary of the invention

Problems to be Solved by the Invention

[0004] In the production of a foamed product, the inventor of the present application is a case in which an image is printed on the foamed medium and then the foamed medium is foamed, and 〇 2020/175 270 2 卩 (: 170? 2020 /006511

If the same color image is printed in, the density of the image printed in the foamed area will be lower than the density of the image printed in the non-foamed area (for example, reflection density). I found that it would be lightened. The above Patent Document 1 does not consider such lightening. As described above, conventionally, the color of the image printed in the first area that is foamed and the second area that is not foamed than the first area may be different after the foaming although they are originally the same. Can occur.

The present invention has been made in order to solve the above problems, and it is possible to obtain an image printed in a first area that foams and a second area that does not foam more than the first area. It is an object of the present invention to provide a printer and a printing method that reduce the difference in color after foaming even though the color is originally the same.

[0006] For example, Japanese Patent Application No. 20 18-2 1 7 2 4 7 discloses that a foaming inhibitor is added to a foamable printing medium including a foam layer made of a thermoplastic resin containing a chemical foaming agent and a substrate. A method for producing a foamed product on which a desired uneven pattern and an image are formed by ink-jet printing a solvent-based anti-foaming ink and a solvent-based colored ink, and then foaming the printing medium. Is disclosed.

[0007] As described above, when the bubbling suppression ink and the coloring ink are printed on the printing medium by inkjet printing, in order to perform the printing efficiently, the bubbling suppression ink and the coloring ink are ejected at the same time. It is preferable to print (for example, the foaming suppression ink and the coloring ink are printed together by a serial ink jet printer every main scanning).

[0008] However, when the printing medium is foamed after printing in this way, even if the same colored ink is printed at the same printing density (the amount of ink printed per unit area), There was a phenomenon in which the colors of the convex part and the convex part were different, and the color of the concave part was darker than that of the convex part.

[0009]Further, even before the foaming, even if the same colored ink is printed at the same printing density, the foaming suppressing area for printing the foaming suppressing ink for forming the concave portion and the foaming suppressing ink are not printed. The color is different from the non-foam suppression area, 〇 2020/175 270 3 (: 170? 2020/006511

The phenomenon that the color of the area became darker than the color of the non-foaming suppressed area was observed.

As a result of earnest research, the inventors of the present invention have found that the difference in the coloring of the colored ink in the foam suppression region and the foam non-suppression region is contained in the thermoplastic resin of the foam layer of the printing medium. However, it was found that this was caused by the fact that the wettability of the printing surface deteriorated by protruding on the printing surface of the printing medium.

[001 1] For example, as shown in Fig. 3 ( ₃ ), on the surface of a printing medium 1 50 provided with a foam layer 1 5 1 containing a thermoplastic resin containing a chemical foaming agent and a plasticizer, Has poor wettability because the plasticizer stands out.

[0012] Therefore, as shown on the left side of Fig. 3 (well), when the image 1 55 is ink-jet printed with colored ink in the non-foaming suppression area of the print medium 150, that is, When only the colored ink is printed on the medium 150, since the surface of the printing medium 150 is poor in wettability, the droplets of the colored ink forming the image 155 do not spread so much, , Maintain spherical shape.

On the other hand, as shown on the right side of FIG. 3(b), when the image 1 54 is ink-jet printed with the colored ink in the foaming suppression area of the printing medium 1 50, that is, the printing medium 1 5 0 When the colored ink and the foam suppression ink are ejected at the same time for printing, the foam suppression ink layer 153 composed of the foam suppression ink cancels the deterioration of the wettability of the surface of the printing medium 150. 5 4 The colored ink droplets that make up 5 4 spread more wet than the colored ink droplets that make up the image 1 5 5 that is printed in the non-foaming suppression area. For example, bleeding and beading (adjacent ink droplets) Binding).

[0014]Therefore, since the plasticizer deteriorates the wettability of the surface of the printing medium 150, the degree of wetting and spreading of the droplets of the colored ink in the foam suppression region and the foam non-suppression region is different. Even if the same colored ink is printed at the same print density, the colors do not look the same. Further, such a difference in appearance color is maintained even after the printing medium 150 is foamed, as shown in Fig. 3 (○).

[0015] In view of the above, the present invention provides a printing medium, a method for producing a foamed printed matter, and an inkjet printing apparatus capable of printing the foaming suppression region in a suitable color. 〇 2020/175 270 4 boxes (: 170? 2020/006511

The porpose is to do.

Means for solving the problem

In order to achieve the above object, the printer according to the first aspect of the present invention is

An ink ejecting unit that ejects colored ink onto the foamed medium while moving relative to the foamed medium before foaming;

A controller that prints the image on the foamed medium by moving the ink ejecting unit relative to the foamed medium and ejecting the colored ink based on image data representing an image,

In the foamed medium, a first part that foams and a second part that does not foam more than the first part are set,

The controller controls the first image to be printed on the first portion of the image and the second image to be printed on the second portion to be closer to the same color after foaming of the foamed medium than before foaming. The amount of the colored ink ejected when printing one image is made different from the amount of the colored ink ejected when printing the second image.

[0017] According to the above configuration, the first portion that foams and the first portion that does not foam than the first portion.

Although the colors of the images printed on the two areas are originally the same, it is possible to reduce the possibility that they will be different after foaming (such as reducing the difference in color. Also, prevention includes prevention).

[0018] The image data indicates a discharge amount of the colored ink for each pixel of the image, and the controller is

The colored ink is ejected to the ink ejecting portion at the ejection amount indicated by the image data,

When the first image and the second image in the image represented by the image data have the same color, the image data indicates the ejection amount of each pixel of the first image, and the second image Changing at least one of the discharge amount of each pixel of, and causing the color ink to be discharged to the ink discharge portion with the changed discharge amount, 〇 2020/175 270 5 units (: 170? 2020/006511

The changed discharge amount is the density of the color of the first image actually printed after the foaming of the foaming media and the color density of the second image actually printed after foaming of the foaming media. and concentration, and a discharge amount closer to the ^_ than when not performing the change,

You may do it.

According to the above configuration, the first portion that foams and the first portion that does not foam than the first portion.

It is possible to reduce that the color of the image printed on the two parts is different after foaming even though they are originally the same color.

[0020] The first portion after foaming has a sloped edge,

The controller outputs image data representing an image of a portion printed on the edge portion of the first image to an image having more voids in which the colored ink is not ejected than the image or a portion printed on the edge portion. Change to image data that represents a lighter color image than

You may do it.

When the first portion is foamed, the change in surface area due to foaming is larger at the edge portion than at the upper surface, and the lightening becomes noticeable. Here, the cause of lightening is that the ink layer representing the image (the layer of colored ink fixed after printing) is cracked and the background (color of foamed media, etc., which is basically a white background) The inventor of the present application has found that the color affects the color of the image. That is, the remarkable lightening means that cracks are noticeable. In the above configuration, cracks can be made inconspicuous by an image with many voids or an image with a light color (because voids that expose the base are formed before foaming, or because the color is light before foaming). , It is possible to improve the appearance of the foamed product after foaming.

In order to achieve the above object, the printing method according to the second aspect of the present invention is

A step of ejecting a colored ink onto the foamed medium before foaming based on image data representing the image, and printing the image on the foamed medium; the foamed medium includes a first portion to be foamed; More foam than the first part 〇 2020/175 270 6 boxes (: 170? 2020/006511

Not the second part, and is set,

In the printing step, the first image printed on the first portion of the image and the second image printed on the second portion are closer to the same color after foaming of the foamed media than before foaming, The ejection amount of the colored ink when printing the first image is made different from the ejection amount of the colored ink when printing the second image.

[0023] According to the above configuration, the first portion that foams and the first portion that does not foam than the first portion.

[0024] The image data indicates a discharge amount of the colored ink for each pixel of the image, and in the printing step,

Causing the colored ink to be ejected to the ink ejecting portion at the ejection amount indicated by the image data,

When the first image and the second image in the image represented by the image data have the same color, the ejection amount of each pixel of the first image indicated by the image data, and the second image Changing at least one of the discharge amount of each pixel of, and causing the color ink to be discharged to the ink discharge portion with the changed discharge amount,

You may do it.

[0025] According to the above configuration, the first portion that foams and the first portion that foams less than the first portion.

The printing medium according to the first aspect of the present invention is

A foam layer containing a first thermoplastic resin containing a chemical foaming agent and a plasticizer 〇 2020/175 270 7 卩(: 170? 2020/006511

When,

An ink receiving layer formed on the foam layer,

Equipped with

The ink receiving layer includes a void-type ink receiving layer containing inorganic fine particles and a binder,

The binder is a second thermoplastic resin having the ability to prevent migration of the plasticizer to the surface of the ink receiving layer.

[0027] According to the above configuration, the bubbling suppression region and the other regions can be printed in the same color only by printing the same colored ink with the same printing density.

(A) A foam suppressing ink containing a foam suppressing agent for suppressing foaming in the foam layer and a non-aqueous solvent is printed at a first print density in a foam suppressing area in the ink receiving layer, When a colored ink containing a colorant and a non-aqueous solvent is printed in the foaming suppression region at a second print density, the color of the foaming suppression region is a first color,

(Case) When the color ink is printed in the foaming suppression area at the second print density and the foaming suppression ink is not printed in the foaming suppression area, the color of the foaming suppression area is set to the second color. When the color of

The ink receiving layer has the ability to absorb the foaming suppression ink and the colored ink to the extent that no difference is visually recognized between the first color and the second color.

It may be that.

According to the above configuration, the bubbling suppression region and the other regions can be printed in the same color only by printing the same colored ink with the same printing density.

[0030]

The color difference between the first color and the second color is 3 or less,

It may be that.

[0032] A method for producing an expandable printed matter according to a second aspect of the present invention is 〇 2020/175 270 8 卩 (: 170? 2020 /006511

In a printing medium having a foam layer containing a thermoplastic resin containing a chemical foaming agent and a plasticizer, the foam suppressing region contains a foam suppressing agent which suppresses foaming in the foam layer, in a foam suppressing region. A first printing step in which a foam-suppressing ink containing an aqueous solvent is ink-jet printed, and the foam-suppressing ink is not printed in a foam-non-suppressing area other than the foam-suppressing area.

A second printing step of printing a colored ink containing a colorant and a non-aqueous solvent on the printing medium, wherein the foaming suppression region and the foaming non-suppression region are printed in the same color with the coloring ink. In order to change the print density for printing the colored ink in the foam suppression region and the foam non-suppression region, a second printing step,

including.

According to the above configuration, even in the printing medium in which the plasticizer is exposed on the printing surface, the foaming suppression area and the other area can be printed in the same color.

[0034] An ink jet printing apparatus according to a third aspect of the present invention is

A printing medium having a foaming layer containing a thermoplastic resin containing a chemical foaming agent and a plasticizer, and a foaming agent containing a foaming inhibitor for suppressing foaming in the foaming layer and a non-aqueous solvent. The first print head that ejects the suppression ink by the inkjet method,

A second print head for ejecting a colored ink containing a colorant and a non-aqueous solvent onto the printing medium by an ink jet method,

By controlling the first print head and the second print head, a foam suppression region where the foam suppression ink is printed and a foam non-suppression region where the foam suppression ink is not printed are set. In order to print the same color with the color ink, a control unit that changes the print density at which the color ink is printed in the foam suppression region and the foam non-suppression region,

Have.

According to the above configuration, even in the printing medium in which the plasticizer is exposed on the printing surface, the foam suppression region and the other region can be printed in the same color. 〇 2020/175 270 9 boxes (: 170? 2020/006511 Effect of invention

[0036] According to the present invention, the colors of the images printed in the first area that is foamed and the second area that is not foamed than the first area are different after foaming, although they are originally the same. It is possible to provide a printer and a printing method that reduce the occurrence of the occurrence.

[0037] Based on the above, it is possible to print the foam suppression region in a suitable color.

Brief description of the drawings

[0038] [FIG. 1] A configuration diagram of a printer according to an embodiment of the present invention.

[Figure 2] Cross-sectional view of foam media.

[Figure 3] A plan view of the foamed media after the image has been printed and foamed.

[Fig. 4] Flow chart of correction process.

[Figure 5] Image of the embossed data.

[Figure 6] Layer image represented by the image data supplied to the controller.

[Fig. 7] Image diagram showing the overlap between the image in Fig. 5 (white part) and the image in Fig. 6. [FIG. 8] A diagram illustrating composition of layer images in a correction process.

[FIG. 9] A cross-sectional view of the foamed media after image printing and foaming.

FIG. 10 is a schematic diagram of a printing medium 60 according to the first embodiment of the present invention. (3) Shows the state before the foam suppression ink and the colored ink, () shows the state after the printing of the foam suppression ink and the colored ink, and (◯) shows the state after the foam.

[FIG. 11] A schematic view of a printing medium 70 used in a second embodiment of the present invention. (3) Shows the state before the foam suppression ink and the colored ink, () shows the state after printing the foam suppression ink and the colored ink, and (◯) shows the state after foaming.

[FIG. 12] A schematic view of a conventional foaming printing medium 150. ( ₃ ) Shows the state before the foam suppression ink and the colored ink, () shows the state after printing the foam suppression ink and the colored ink, and (◯) shows the state after the foaming.

[FIG. 13] A graph showing reflection densities when a foaming suppression ink and a yellow ink are printed on a foamable printing medium having no ink receiving layer.

[Fig. 14] Addition of anti-foaming ink to foamable printing media with ink receiving layer. 〇 2020/175 270 10 boxes (: 170? 2020/006511

The graph which shows the reflection density when the yellow ink is printed.

MODE FOR CARRYING OUT THE INVENTION

[0039] (Configuration of Printer 100)

The printer 100 according to the embodiment of the present invention is an ink jet printer, and as shown in FIG. 1, includes an ink jet head 110, a drive mechanism 120, and a controller 130. Note that the printer 100 may be another type of printer.

[0040] The ink jet head (ink ejection unit) 110 ejects ink supplied from an ink supply mechanism (not shown) to the sheet-shaped foaming media 1 0 (Fig. 2). As the ink jet head 110 and the ink supply mechanism, known ones can be used, and therefore detailed description of the structure will be omitted.

As shown in FIG. 2, the foamed medium 10 includes a base material 11 and a foamed layer 12.

The base material 11 supports the foam layer 12. Examples of the base material 11 include paper-made cloth and non-woven cloth-made cloth.

The foam layer 12 is a layer that is expandable by foaming. The foam layer 12 is based on a thermoplastic resin, and a chemical foaming agent that generates gas due to thermal decomposition or the like due to heating is dispersed in the thermoplastic resin. As the chemical foaming agent, azodicarboamide and the like are preferable. The foam layer 12 further includes a foaming aid (such as zinc oxide) that promotes foaming of the chemical foaming agent and lowers the foaming start temperature. Since the image is printed, the foam layer 12 is formed in white here.

[0044] The ink that can be ejected from the ink jet head 110 includes foamed media.

There is a foaming control ink (transparent ink) that controls the foaming point of 10 (where to foam), and a colored ink such as 〇 IV!丫 to print a color image on the foaming medium 10. ..

As the foaming control ink, here, a foaming suppressing ink that penetrates into the foaming layer 12 and chemically suppresses foaming is adopted. Such a foam-suppressing ink is applied to a region of the foam layer 12 which is not desired to be foamed. The foam suppression For example, 1,2,3-benzotriazole, 1-[N,N-bis(2-ethylhexyl)aminomethyl]benzotriazole, 1_[N,N-bis(2-ethylhexyl)aminomethyl]methyl It contains chemical foaming inhibitors such as benzotriazole compounds such as benzotriazole. A non-aqueous solvent is used as the solvent in the foam suppression ink. For example, the non-aqueous solvent is a solvent other than water, and examples thereof include volatile organic compounds (VOC).

As the coloring ink, there is used a coloring ink that causes no problem even when used in the area of the foaming layer 12 onto which the foaming suppressing ink is ejected. Here, four types of colored inks, C (cyan)-M (magenta), Y (yellow), and K (black), are used. Each color ink is preferably a non-aqueous pigment ink, particularly preferably a solvent ink. Solvent inks include solvent ink SS21 (colorant; pigment, solvent; organic solvent) manufactured by Mimaki Engineering Co., Ltd., solvent ink BS4 (colorant; pigment, solvent; organic solvent) manufactured by Mimaki Engineering Co., Ltd., etc. Is mentioned.

The drive mechanism 120 is configured to include a mechanism for moving the ink jet head 110 in the main scanning direction and a mechanism for moving the foamed medium 10 in the sub scanning direction. The drive mechanism 120 may be a mechanism that moves the ink jet head 110 in the main scanning direction and the sub scanning direction. A well-known drive mechanism can be used as the drive mechanism 120, and thus detailed description of the structure is omitted.

[0048] The controller 1 30 is a CPU (Central Processing Unit), a graphic processor.

RAM (Random Access Memory), which is the main memory of the processor.

mory), a non-volatile storage device that stores programs executed by the processor and various data.

(Flash memory, hard disk, SSD (Solid State Drive), etc.) 〇 2020/175 270 12 boxes (: 170? 2020/006511

It is composed of.

The controller 130 controls the entire printer 100 (in particular, the inkjet head 110, the operation of the drive mechanism 120, etc.), and prints on the foamed medium 10.

The controller 1300 can communicate with an external host computer or the like, and the controller 1300 receives emboss data and image data from the host computer or the like.

[0051] The emboss data is data that specifies the shape of the convex portion (emboss shape) that is desired to be formed by foaming, and is the data that specifies whether or not to discharge the foaming control ink for each pixel. Here, since the bubbling control ink is a bubbling suppression ink, ejection is designated for the pixels outside the convex region, and non-ejection is designated for the pixels inside the convex region.

The image data is data representing an image to be printed on the foamed medium 10, and is also the ejection amount of each colored ink for each pixel of the image (also the print density, which is the density of the colored ink per pixel. , Which is expressed as a percentage with the maximum dischargeable amount being 100%). The ejection amount includes the size of the color ink droplets, or the number of color ink droplets ejected per pixel. In other words, the image data includes pixel data that specifies each of a plurality of pixels, and data that specifies the ejection amount of each of the color inks of 1/1/1, which is associated with each pixel data.

The number of rows and the number of columns of pixels of the embossed data are the same as the number of rows and the number of columns of pixels of the image data, and the former pixels and the latter pixels have a one-to-one correspondence. Corresponding pixels are set at the same position on the foamed media 10.

[0054] The controller 130 controls the drive mechanism 120 and controls the ink jet head.

1 1 0 is moved in the main scanning direction and the sub-scanning direction with respect to the foamed medium 1 0. The controller 1300 controls the ink jet head 1100 synchronously with this movement, and the ink jet head 1110 outputs data that specifies that foaming control ink is to be ejected from each pixel of the emboss data. Position of pixel corresponding to 〇 2020/175 270 13 卩(: 170? 2020/006511

Each time the ink is moved to, the ink for controlling foaming is ejected from the ink jet head 110. Further, the controller 1300 controls the ink jet head 1100 each time the ink jet head 110 moves to the pixel position of the image data, and the ejection amount corresponding to the pixel position of the image data. The colored ink is ejected at (when the ejection amount is 0, the colored ink is not ejected).

The image data and the emboss data may be created as one image data and supplied to the controller 130.

Further, the controller 130 compares the embossed data with the image data and appropriately corrects the ejection amount designated by the image data. The processing will be described later.

In addition to the above-described configuration, the printer 100 may include an operation unit that receives an operation from the user, a display unit that displays an operation screen, and the like.

(Correction of ejection amount of image data)

The correction of the ejection amount specified by the image data by the controller 130 will be described below. In the following, as an example, as shown in FIG. 3, it is assumed that a square image (here, an image that is solidly colored with the same color) is to be printed on the foamed medium 10. Figure 3 shows the foam media 10 (foam product) after image printing and foaming. In the printing of the image, the ejection amount is corrected as described later, and the image of the layer image page shown in Fig. 8 is actually printed. The foaming medium 10 is set with a square frame-shaped first part 1 0 (the part corresponding to the edge of the image) and a second part 1 0, which is the other part, when seen in a plan view. However, only the first part 108 shall be foamed. Of the images, the part printed on the first part 108 is the first image 1 and the remaining part is the second image 2.

[0059] The controller 1300 performs the following correction processing by executing the program stored in the storage device by the II etc. of the controller 1300. The ejection amount of the image data is corrected by the correction process.

[0060] (Correction processing) 〇 2020/175 270 14 卩 (: 170? 2020 /006511

When the emboss data and the image data are supplied from the outside, the controller 130 starts the correction process shown in FIG. When the embossed data and the image data form one image data, the controller 130 separates the image data into embossed data and image data and performs the following processing.

[0061] Here, it is assumed that the emboss data is, for example, data representing an image in which pixels that eject the bubbling control ink are black and pixels that do not eject the bubbling control ink are white. Image 0 represented by the emboss data is shown in FIG. Image 0 has the same shape as the surface of the foamed media 10. As shown in Fig. 5, the image 0 represented by the emboss data is a square frame-shaped white image 0 1 and the other black images (in Fig. 5, black is represented by hatching) image 0 2, Consists of. The white image 0 1 corresponds to the first portion 10 which is the foamed area of the foamed medium 10. The black image 0 2 corresponds to the second part, 10m. Therefore, the foaming control ink (here, the foaming suppression ink) is applied to the non-foaming area of the foaming medium 10.

[0062] The image data is data representing an image, but here, the image data is input to the controller 130 as image data representing a layer image having the same shape as the image 0. Figure 6 shows the layer image [¾. The layer image consists of the image located in the center and the margin area 1 other than the image. The margin area 1 is an area where the colored ink is not ejected. In the image data, the ejection amount of the colored ink corresponding to each pixel in the blank area 1 is “0”.

[0063] In the correction process, the controller 1330 uses the image ◯ represented by the embossed data and the layer image 8 represented by the image data based on the white image 〇 1 of the image 〇 and the layer image [¾ The image data representing the layer image 3 (image having the same shape as the layer image) including the image 3 1 representing the overlapping part is generated as shown in FIG. Yes (step 3 1). Similar to the image data of the layer image, the image data is the ejection amount of each colored ink for each pixel of the layer image 3 (here, the maximum ejection amount that can be ejected is 1 〇 2020/175 270 15 卩(: 170? 2020/006511

It is generated as data that specifies (0 0%). The ejection amount of the pixels in the portion other than the image 31 in the layer image 3 (the portion in which the image 0 and the image do not overlap) is 0.

[0064] Here, the discharge amount designated by the image data of the image 31 portion of the image data representing the layer image 3 will be described. The inventor of the present application, when the image is printed on the foamed medium and then the foamed medium is foamed, and when an image of the same color is printed in the foamed region and the non-foamed region, the image is printed in the foamed region We found that the image that is printed has a lower density (for example, the reflection density) than the image that is printed in the non-foamed area, that is, it is lightened. The inventor of the present application has investigated the cause of this, and in the image printed in the foamed area, the ink layer representing the image is cracked due to expansion due to foaming, and the color of the foamed area (white here) is visible I found that. Then, the inventor of the present application has found that the density of the image to be printed in the foamed region to be foamed thereafter is increased in advance by the amount of the decrease in the density. The layer image 3 is an image for increasing the density of the image, and the ejection amount specified by the image data representing the layer image 3 is the ejection amount corresponding to the increase in the density.

[0065] In the storage unit of the controller 1300, the discharge amount specified by the image data supplied to the controller 1300 (1 to 100%, but a high value such as 100% is usually Is not used.), and a discharge amount threshold corresponding to the above-mentioned increase amount, a table (the table is prepared, for example, for each type of colored ink) is prepared. The relationship between the discharge amount and the discharge amount limit may be determined by experiments. For example, multiple images with different discharge amounts are printed on the foamed media (sample) that has not been foamed, on each of the foamed area that is to be foamed and the non-foamed area that is not to be foamed. And the plurality of images on the non-foamed region are compared with each other (the comparison may be performed, for example, by reflection density or the like). If there is an image with the same color (or an image with a color that is acceptable to be the same, and the colors are similar), the discharge amount at the time of printing the image on the non-foamed area in the image with the same color is the discharge amount. , Images with the same color 〇 2020/175 270 16 卩 (: 170? 2020 /006511

The table is created by taking the value obtained by subtracting the discharge amount (the discharge amount) when printing the image on the non-foamed region from the discharge amount when the image on the foamed region of the image is printed as the discharge amount To do.

[0066] The controller 1300 obtains the discharge amount corresponding to one pixel of the pixels of the portion corresponding to the image 3 1 in the layer image among the image data representing the layer image. Based on the acquired discharge amount, the controller 130 refers to the table and acquires the discharge amount corresponding to the discharge amount that matches the discharge amount. The controller 130 uses the ejection amount threshold acquired above as the ejection amount of the pixel corresponding to the one pixel in the image data representing the layer image 3. The controller 130 performs such a process for each pixel of the portion corresponding to the image 31 and for each type of colored ink. In this way, the image data of the layer image 3 with the ejection amount of each pixel of the image 31 as the ejection amount obtained from the table is obtained.

[0067] After step 31, the controller 1300 synthesizes the layer image and the layer image 3 by combining the image data representing the layer image and the image data representing the layer image 3 as shown in Fig. 8. Image data representing a layer image page in which and are combined is generated (step 32). In the synthesis, the ejection amounts of the corresponding pixels are added together. The layer image has an image, and the first image 1 of the images is darker than the second image 2 (same as the image color of the layer image) (the ejection amount increases by 1 minute for image 3). Image). In this way, the color depth of the image is corrected. Will be corrected).

[0068] (Printing after correction and foaming)

After the above correction processing, the controller 130 controls the ink jet head 110 based on the emboss data and causes the ink jet head 110 to eject the bubbling suppression ink. As a result, foaming is suppressed only in the second part 10 of the foamed media 10 other than the first part 10 (foaming area). 〇 2020/175 270 17 卩(: 170? 2020/006511

Foam control ink is applied.

[0069] Furthermore, after the above correction processing, the controller 130 controls the ink jet head 110 based on the image data representing the layer image page (according to the ejection amount of each pixel of the image data), Use the inkjet head 110 to print the image of the layer image (corrected image) on the foamed media 10. In the image printed on the foamed media 10, the color of the first image 1 is darker than the color of the second image 2 (the two colors are the same without correction).

[0070] After that, the foamed medium 10 after printing is heated to foam the foamed layer 12.

Here, the foam control ink causes only the first portion 108 of the foam layer 12 to foam and rise. Due to this swelling, the first image 1 on the first part 108 is dimmed as described above (the density is reduced), but the above-mentioned correction before printing causes the dimming (density reduction) to occur. 1st image only for minutes? Since 1 is darkened, the color of the first image 1 after foaming becomes lighter and approaches that of the second image 2 (the second image 2 is not affected by foaming and the color does not change). The image printed on the final foamed media 10 after foaming looks similar or close in color, as shown in FIG.

[0071] (Effect etc.)

In this embodiment, it is possible to make a correction in anticipation of lightening due to foaming, and the colors of the first image 1 and the second image 2 after foaming can be brought close to or the same. It is possible to reduce the inconvenience that the colors of the second image 2 and the color of the second image 2 are different after foaming even though they are originally the same.

(Modification)

The present invention is not limited to the embodiment described above. The above embodiment can be modified as appropriate.

(Modification 1)

In the above, the table is referred to when darkening, but the relational expression between the density of the original image color and the degree of lightening due to foaming is preliminarily derived by experiments or the like (controller 130 Stored in the memory)) 〇 2020/175 270 18 卩 (: 170? 2020 /006511

In this case, the ejection amount of ink may be specified by the above relational expression, and the image data of the layer image 3 may be generated. The darkening (correction process) may be performed before being supplied to the printer 100 (for example, it may be performed by a host computer or the like). Further, the image data may be generated in anticipation of the lightening (for example, when the image is created by the image software, the first image 1 should be darker than the intended color). .. In this way, the image data may already represent the image in which the color of the first image 1 is darker than the color of the second image 2 when it is supplied to the printer 100.

[0074] (Modification 2)

In the above, the first image 1, which is lightened by foaming, is darkened.However, in addition to or instead of the darkening, the second image 2 is originally colored because the first image 1 is lightened by foaming. The image (layer image) may be lightened. The darker the density of the first image 1, the greater the degree of lightening of the first image 1. Therefore, it is more efficient to lighten the second image 2.

[0075] (Modification 3)

An ink receiving layer or the like that reduces ink bleeding or the like may be provided on the foam layer 12.

(Modification 4)

Figure 9 shows the cross-section of the first part, such as 10 after foaming. As shown in FIG. 9, when the foam layer 12 foams, the protrusions 12 are formed. The convex portion 12 has an upper surface and an inclined surface. Compared with before foaming, the surface area of the convex portion 12 is larger on the slope than on the upper surface. Therefore, in the first image 1 (the ink layer representing the first image 1), the images 1 2 and 1 3 (inks) on the slope of the convex 1 2 8 are more than on the image 1 1 on the upper surface of the convex 1 2 8. The layer) is more prone to the above-mentioned cracks, and the cracks are likely to be larger and more conspicuous. Therefore, in the above correction process, the edge of the image 3 1 of the layer image 3 (the range is obtained in advance by experiments, etc.) is changed to a stippled image (dot pattern image) or halftone image. Good. In this way, the colored ink ejects the image of the part printed on the edge. 〇 2020/175 270 19 卩 (: 170? 2020 /006511

The cracks can be made inconspicuous by changing to an image with many pixels (voids) that are not exposed (light voids) (Because voids that expose the base are formed before foaming, or before foaming. Because the color is light).

In relation to the above, when the printer 100 can express the same color with inks having different coloring degrees, the first image 1 is an image with voids such as pointillism with the first ink having good coloring, 2 Image 2 is a solid-painted image with the second ink, which has a lower degree of color development than the first ink, and the first and second images 1 and 2 after foaming have the same or similar color depth. You may do so. In addition, the entire image to be printed, only the part of the image to be printed that is printed on the foamed part, or the entire image of the same color including the image that is printed on the foamed part of the image to be printed, has voids such as dots. A certain image may be provided to prevent the cracks. According to these, it is possible to prevent the occurrence of cracks and prevent the lightening.

[0078] (Modification 5)

The foam layer 12 may include a thermoplastic resin as a base, and thermally expandable microcapsules dispersed in the thermoplastic resin. The heat-expandable microcapsule includes a thermoplastic resin microcapsule and a volatile solvent (liquid hydrocarbon or the like) enclosed in the microcapsule. The foam layer 12 rises when the volatile solvent is volatilized by heating and the heat-expandable microcapsules expand. In this way, the foam layer 12 foams, and the surface rises due to foaming. In this case, the foaming control ink should be an ink containing an absorber that absorbs electromagnetic waves and generates heat (for example, the ability to absorb near infrared rays-such as Bon Black), and apply it to the part to be foamed (see the embossed pattern above). Black and white are reversed). At the time of foaming, the foaming medium 10 is irradiated with the electromagnetic wave and the like, and only the part coated with the foaming control ink is heated to enable partial foaming.

[0079] (Modification 6)

The emboss data may specify the ejection amount of the foaming control ink. in this case 〇 2020/175 270 20 units (: 170? 2020/006511

The degree of darkening may be different according to the discharge amount (that is, the degree of foaming).

[0080] (First Embodiment)

A printing medium 60 according to the first embodiment of the present invention will be described with reference to the drawings.

[0081] (Structure of printing medium 60)

As shown in Fig. 1 (3) to (○), the print media 60 is a foamable media that foams and thickens when heated. The printing medium 60 includes a foam layer 61 and an ink receiving layer 62 formed on the foam layer 61. The shape of the printing medium 60 is arbitrary as long as ink jet printing is possible, and may be, for example, a sheet shape, a mouth shape, or any three-dimensional shape.

[0082] (Foam layer)

The foam layer 61 is a layer of the first thermoplastic resin containing a chemical foaming agent and a plasticizer. When heated above a predetermined temperature (hereinafter also referred to as foaming temperature), the foamed layer 61 expands with a gas generated by thermal decomposition of a chemical foaming agent described later, and becomes thicker than before heating. This is also expressed as "foaming" of the foam layer 61.

[0083] The shape of the foam layer 61 is arbitrary as long as it matches the desired shape of the printing medium 60, and may be, for example, a sheet shape, a mouth shape, or any three-dimensional shape. ..

[0084] (Chemical foaming agent)

The chemical foaming agent is not particularly limited as long as it is a substance that chemically generates a gas and decomposes when heated to a temperature higher than the foaming temperature. ,4' monooxybis (benzenesulfonyl hydrazide), 1, 1'-azobis (1-acetoxy 1-phenylethane), dimethyl 2,2'-azobisbutyrate, dimethyl-2,2'-azobisisobutyrate, 2, 2, 2, -Azobis (2,4,4-trimethylpentane), 1,1,-Azobis (cyclohexane-1 -carbonitrile), 2, 2, -azobis [!\1 _ (2-carboxyethyl) _ 2-methyl-propionamidine ] 〇 2020/175 270 21 卩 (: 170? 2020 /006511

Azo compounds such as; 1\1, 1\1, Nitroso compounds such as dinitrosopentamethylenetetramine (0), 4,4'-oxybis (benzenesulfonyl hydrazide), diphenyl sulfone 3, 3'age Hydrazine derivatives such as sulfonyl hydrazides;! -Semicarbazide compounds such as toluenesulfonyl semicarbazide; organic thermal decomposition type foaming agents such as trihydrazino triazine; bicarbonates such as sodium hydrogen carbonate and ammonium hydrogen carbonate; carbonates such as sodium carbonate and ammonium carbonate; ammonium nitrite and the like Examples include inorganic pyrolyzable foaming agents such as nitrites and hydrogen compounds. These chemical foaming agents may be used alone or in combination of two or more kinds.

[0085] For example, azodicarbonamide decomposes at about 230 ^° C to generate nitrogen gas, carbon dioxide gas, carbon dioxide gas, and the like.

[0086] As the chemical foaming agent, an organic thermal decomposition type foaming agent is preferable, an azo compound is more preferable, azodicarbonamide, 1\1, 1\1'-dinitrosopentamethylene tetramine, or 4, 4 '-Oxybis(benzenesulfonyl hydrazide) is particularly preferred.

The foam layer 61 may further contain a foaming aid. The foaming aid is not particularly limited as long as it promotes the foaming reaction of the chemical foaming agent, but more specifically, it is preferably a catalyst that lowers the decomposition temperature of the chemical foaming agent, and a metal-containing metal-based agent. More preferred are the foaming assistants. When the foaming aid is a metal-based foaming aid, the chelating agent described below can be used to easily adjust the foaming property of the chemical foaming agent.

[0088] Examples of the foaming aid include organic metal compounds such as zinc compounds and barium compounds or inorganic metal compounds, organic acids, urea, and derivatives thereof. Among them, organic metal compounds or inorganic metal compounds are preferable, and zinc compounds and barium compounds are preferable.

[0089] Specific examples of the organometallic compound or the inorganic metallic compound of the zinc compound include zinc oxide (Zn o) and zinc stearate. Specific examples of the organic acid include boric acid, oxalic acid, succinic acid, and adipic acid.

[0090] For example, when azodicarbonamide (8008) is used as the chemical foaming 〇 2020/175 270 22 卩 (: 170? 2020 /006511

In addition, when zinc oxide is used as a foaming aid, the decomposition temperature of the chemical foaming agent decreases from about 240° 〇 to about 150° 〇.

[0091] These foaming aids may be used alone or in combination of two or more. For example, zinc stearate and zinc oxide can be used in combination.

[0092] When the foaming aid is a metal compound such as an organometallic compound or an inorganic metal compound, the effect as a foaming aid is nullified by a foaming inhibitor described later chelating the foaming aid. It is possible to suppress the foaming only in a specific area of the printing medium 60 and form the concave portion relatively.

[0093] (First thermoplastic resin)

The first thermoplastic resin expands with the gas generated by the thermal decomposition of the chemical foaming agent when heated above the foaming temperature, and at room temperature (15 to 25 ^° 〇), it is at least thicker than before heating. Any thermoplastic resin can be adopted as long as it can be maintained. Examples of the first thermoplastic resin include thermoplastic resins such as soft vinyl chloride resin, acrylic resin, urethane resin, polyolefin, and ethylene-vinyl acetate copolymer, and particularly soft vinyl chloride resin. .. The first thermoplastic resin is preferably one that dissolves in the foam suppression ink.

[0094] For example, as a vinyl chloride resin that is a main component of a soft vinyl chloride resin, a polymer obtained by homopolymerizing a vinyl chloride monomer, a polymer obtained by copolymerizing a vinyl chloride monomer with another monomer, and a modification thereof The body is included.

[0095] As the plasticizer for the first thermoplastic resin, dioctyl phthalate, diisononyl phthalate, diisodecyl phthalate, dibutyl phthalate, and other phthalic acid esters; dioctyl adipate, adipic acid such as diisononyl adipate, etc. Acid ester; trimellitic acid ester such as trioctyl trimethylate isononyl phthalate and the like.

[0096] Further, the first thermoplastic resin of the foam layer 61 may be blended with other additives. Other additives include fillers, flame retardants, plasticizers, heat resistance stabilizers, weather resistance stabilizers, pigments and dyes.

(Ink Receiving Layer) 〇 2020/175 270 23 卩 (: 170? 2020 /006511

The ink receiving layer 62 is a void-type ink receiving layer containing inorganic fine particles and a binder that binds them. The ink receiving layer 62 is a space between the inorganic fine particles bonded by the binder and absorbs the foaming suppression ink and the coloring ink described later. As a result, bleeding of these inks printed on the ink receiving layer 62 is suppressed. Further, in the foam suppression ink (FIGS. 1 () and (◯)) absorbed in the ink receiving layer 62, the foam suppression ink layer 6 3) penetrates to the back surface and comes into contact with the foam layer 61.

(Inorganic fine particles)

The inorganic fine particles are fine particles made of an inorganic material.

[0099] The inorganic material is not particularly limited, and examples thereof include light calcium carbonate, heavy calcium carbonate, magnesium carbonate, kaolin, titanium dioxide, zinc oxide, zinc hydroxide, calcium silicate, magnesium silicate, synthetic silica, alumina, aluminum. Mina hydrate, fine particles of magnesium hydroxide and the like can be mentioned. These inorganic fine particles may be used alone or in combination of two or more kinds. As the inorganic material, synthetic silica, alumina, or alumina hydrate is particularly preferable.

[0100] The particle size of the inorganic fine particles is arbitrary as long as it can form voids that absorb ink. For example, the average secondary particle size of the inorganic fine particles is preferably 500 nm or less, More preferably, it is 300 n. The particle size can be measured by a centrifugal sedimentation method, a laser diffraction scattering method, or the like.

[0101] (Binder)

The binder is an arbitrary thermoplastic resin (second thermoplastic resin) that can dissolve or swell in the foam suppression ink described later, but prevents migration of the plasticizer from the foam layer 61 to the surface of the ink receiving layer 62. Is. Here, “preventing” means not only completely preventing migration of the plasticizer from the foam layer 61 to the surface of the ink receiving layer 62, but also adversely affecting the ink absorbing ability of the ink receiving layer 62. It also includes that the plasticizer migrates from the foaming layer 61 to the surface of the ink receiving layer 62 only in such a small amount that does not give

[0102] The ability of the second thermoplastic resin to prevent migration of the plasticizer depends on the plasticity of the second thermoplastic resin. 〇 2020/175 270 24 卩 (: 170? 2020 /006511

It is determined by the degree of swelling in the agent. Therefore, it is preferable that the second thermoplastic resin is not dissolved or swelled by the plasticizer contained in the first thermoplastic resin of the foamed layer 61, or substantially not dissolved or swelled. Examples of such a second thermoplastic resin include resins such as urethane resins, acrylic resins, polyolefin resins, and silicone resins, which are not dissolved or swelled by the plasticizer or are not substantially dissolved or swelled by the plasticizer. For example, when the plasticizer is a phthalate such as dioctyl phthalate, diisononyl phthalate, isodecyl phthalate, and dibutyl phthalate, polyethylene terephthalate, polyethylene, polypropylene or the like can be used as the second thermoplastic resin.

[0103] Further, the binder may be mixed with other additives. Other additives include colorants, surfactants, thickeners, optical brighteners and the like.

[0104] (Ink absorption capacity of ink receiving layer)

The ink absorption capacity of the ink receiving layer 62 is as follows: (3) The bubbling suppression ink described below is printed at the first printing density in the bubbling suppression region in the ink receiving layer 62, and the coloring ink described below is the second printing density. If the color of the foaming suppression area is printed in the first color (color of image 64 in Fig. 1 (○)) when it is printed in the foaming suppression area, the colored ink foams in the second printing density. When the color of the foam suppression area is the second color (the color of image 65 in Figure 1 (○)) when it is printed in the suppression area and the foam suppression ink is not printed in the foam suppression area, It is preferable that the color is adjusted so high that no difference is visually recognized between the first color and the second color. The printing of the foaming-suppressing ink and the printing of the coloring ink for the first color are arbitrary, and may be performed at the same time.

[0105] In the present specification, the "printing density" means the amount of ink printed per unit area.

[0106] The ink absorption capacity of the ink receiving layer 62 can be controlled by a known method, for example, by controlling the particle size of the inorganic fine particles, the ratio of the inorganic fine particles to the binder, the thickness of the ink receiving layer 62, and the like. .. In particular, to prevent migration of plasticizer in the ink receiving layer 62 〇 2020/175 270 25 卩 (: 170? 2020 /006511

Since the capacity is basically determined by the type of the second thermoplastic resin used in the ink receiving layer 62, the ink absorbing capacity of the ink receiving layer 6 2 and the plastic transfer prevention capacity of the ink receiving layer 62 are independent. It is possible to control it.

The first print density of the foam suppressing ink described above is determined based on the print density of the foam suppressing ink that is assumed for the printing medium 60. For example, the first printing density is preferably set to be equal to or lower than the saturated printing density at which the degree of suppressing the foaming of the foam layer 61 does not change even if the foam suppressing ink is further printed.

The second print density of the above-described colored ink is determined based on the print density of the colored ink assumed on the printing medium 60. For example, the second print density is preferably set to be equal to or lower than the saturated print density at which the appearance of the color of the foam layer 61 does not change even if the colored ink is printed further (that is, the color looks the same).

[0109] The comparison between the first color and the second color may be performed by visual observation, or may be performed by numerically determining the two colors with a colorimeter and obtaining the color difference. As the colorimeter, a spectrophotometric densitometer (Fluorescence spectral densitometer Rho 5, manufactured by Konica Minolta) can be used. In addition, the color difference can be calculated by using the color difference formula: I I 1 9 7 6 1_ * ₃ * 13 *. When the ink absorption capacity of the ink receiving layer 62 is evaluated by the color difference between the first color and the second color, it is preferable that this color difference is just equal to or less than the noticeable difference. In addition, the ink absorption capacity of the ink receiving layer 6 2 can be calculated as follows.

This color difference is preferably 3 or less.

[01 10] The ink absorption capacity of the ink receiving layer 62 is described above for each of a plurality of combinations of one or more foam-suppressing inks and one or more colored inks that the printing medium 60 supports. May be prepared as follows.

[01 11] The ink receiving layer 62 can be provided on the foaming layer 61 in the same manner as the conventional ink receiving layer except that the binder of the ink receiving layer 62 is selected. For example, the ink receiving layer 6 2 may be formed by applying a coating liquid containing the components that form the ink receiving layer 6 2 to the foam layer 6 1 and drying it, or by separately forming the ink receiving layer 62. Various known methods can be used, such as the method of transferring to 6 1. Preferred 〇 2020/175 270 26 卩 (: 170? 2020 /006511

The new method is coating. Examples of the coating method include a mouth coating method, a slide bead method, a force ten method, an extrusion method, an air knife method, and a rod bar coating method.

[01 12] (Base material)

The printing medium 60 may further include a base material formed on the surface of the foam layer 61 on the side where the ink receiving layer 62 is not formed. The substrate increases the strength of the printing medium by supporting the foamed layer 61 directly or indirectly laminated on the surface thereof. Further, the base material holds the first thermoplastic resin of the foamed layer 61 that has been melted and softened when the printing medium 60 is heated and foamed. For example, examples of the base material include backing paper and non-woven fabric.

[01 13] (Use of print media 60)

As shown in Fig. 1 (匕), by printing the bubbling suppression ink and the coloring ink on the printing medium 60 before bubbling, as shown in Fig. 1 (○), the desired uneven pattern and image are formed. Foams having can be produced.

[01 14] (Foam control ink)

The foam-suppressing ink consists of a foam-suppressing agent that lowers the thermal resolution of the foaming layer 61 and a foam-suppressing agent that melts (if the foam-suppressing agent is a solid, the foam-suppressing agent is dissolved, and if the foam-suppressing agent is a liquid, the foam-suppressing agent is a foam-suppressing agent. And a solvent capable of moving the foaming inhibitor to the foamed layer 61, and an ink for ink jet printing.

[01 15] (Foam suppressor)

The foaming inhibitor is not particularly limited as long as it reduces the thermal resolution of the foamed layer 61. For example, when the foamable resin composition contains a chemical foaming agent and a foaming aid, and the foaming aid consists of a metal catalyst, the foaming inhibitor chelates (catalyzes) the catalyst metal. However, it is preferable that the catalyst function can be lowered. Examples of such foaming inhibitors include chelating agents.

[0116] The chelating agent is not particularly limited as long as it can chelate (coordinate) the catalyst metal. Chelating agents include glycolic acid, lactic acid, malic acid, tartar 〇 2020/175 270 27 卩 (: 170? 2020 /006511

Acids, oxycarboxylic acids such as citric acid and their salts, ethylenediaminetetraacetic acid (N0-8), ditrilotriacetic acid (1\1-8), diethylenetriaminepentaacetic acid (0-8), hydroxyethylenediaminetriacetic acid (1 ^to 1 0 8), Glycol ether diamine tetraacetic acid (0 to 0 8), Triethylenetetramine hexaacetic acid (1 ^to 1 to 8), Hydroxyethyliminoniacetic acid (1 ^to 1 0 to 8) , Aminocarboxylic acids such as dihydroxyethylglycine (0 1 ^to 1) and salts thereof,

2-aminoethylphosphonic acid, 1-hydroxyethylidene-1,1-diphosphonic acid, aminotri(methylenephosphonic acid), ethylenediaminetetrakis(methylenephosphonic acid), diethylenetriaminepenta(methylenephosphonic acid), ethane-1,1-diphosphonic acid Acid, ethane-1,1,2-triphosphonic acid, ethane-1-hydroxy-1,1-diphosphonic acid, ethane-1-hydroxy-1,2-triphosphonic acid, ethane-1,2-dicarboxy-1,

2-diphosphonic acid, methanehydroxyphosphonic acid, 2-phosphonobutane-1,2-dicarboxylic acid, 1-phosphonobutane-2,3,4-tricarboxylic acid and phosphonic acid such as <<-methylphosphonosuccinic acid and salts thereof, 5 - main Chiru ¹ 11 _-benzotriazole (aka tolutriazole), triazole-based compounds and salts thereof such as Benzotori azole. Above all, a chelating agent that does not corrode members of the printing apparatus such as an inkjet head and does not dissolve the water-repellent layer is preferable. Examples of such chelating agents include triazole compounds.

[0117] The triazole-based compound is not particularly limited as long as it has a triazole skeleton. Among the triazole compounds, benzotriazole compounds are preferable. The benzotriazole-based compound is not particularly limited as long as it has a benzotriazole skeleton.

[0118] The benzotriazole-based compound is 1, 2, 2, 3-benzotriazole, 1-[1\1, ,-bis (from the viewpoint of the permeability into the foam layer 61 of the printing medium 60). 2-ethylhexyl) aminomethyl] benzotriazole, 1 _ [1\1, 1\1 _ bis (2-ethylhexyl) aminomethyl] methylbenzotriazo 〇 2020/175 270 28 卩 (: 170? 2020 /006511

And [2,2,1[[(methyl-11-1 ^to 1-benzotriazol-1-yl)methyl]imino]bisethanol are preferred.

[01 19] Further, the benzotriazole-based compound is not decomposed when it is heated to foam the printing medium 60, and it is possible to prevent the sublimation from diffusing to other parts than the printing part. And those having a boiling point higher than the foaming temperature are preferred.

[0120] As these benzotriazole compounds, commercially available compounds can be used. For example, as 1, 2, 3 -benzotriazole, as for Johoku Chemical Co., Ltd., Ming-Cho 1 120, 1-[1\1, 1\1-bis(2-ethylhexyl)aminomethyl]benzotriazole As for Johoku Chemical Industry Co., Ltd., _ 1_ 乂 (trade name), 1 — [1\1, 1\1—Bis (2-ethylhexyl) aminomethyl] methyl benzotriazole as Johoku Chemical Kogyo Co., Ltd., _! (trade name), 2, 2'_ [[(methyl-1 1 ^~ 1 _benzotriazol 1-yl)methyl]imino] Bisethanol is available from Johoku Chemical Co., Ltd. Ding _!_ 丫 (product name) etc. can be used.

[0121] As the foaming inhibitor, it is preferable to use one that has a high solubility in the alkylen glycol alkyl ethers that are the solvents generally used in solvent inks. Examples of foaming inhibitors include 2,2'-[(methyl-1 1 ^to 1-benzotriazol-1-yl)methyl]imino]bisethanol, 1-[1\1 ,1\1 _bis

(2-Ethylhexyl) aminomethyl] benzotriazole, methyl-11 ^to 1-benzotriazole and the like can be used.

[0122] When the foaming suppressor is solid at room temperature, in addition to the bleeding suppressing effect of the ink receiving layer 62, it becomes solid when the foaming suppressing ink is dried on the printing medium 60 after printing. Bleeding can be further prevented. On the other hand, if the foam control agent is liquid at room temperature, the ink jet head will not be clogged and maintenance will be excellent. The foaming inhibitor may be used alone or in combination of two or more kinds.

[0123] The ratio of the foam suppressing agent in the foam suppressing ink is preferably 1 to 80% by weight. 〇 2020/175 270 29 卩 (: 170? 2020 /006511

More preferably, it is 5 to 20% by weight.

[0124] (solvent)

The solvent contained in the foam suppression ink is a compound that is a liquid ^at room temperature (15 ^° 〇 to 25 ^° 〇), and the foam suppressor dissolves (When the foam suppressor is a solid, the foam suppressor is dissolved to suppress foaming. It is a non-aqueous solvent that is compatible with the foaming inhibitor when the agent is a liquid) and can move the foaming inhibitor to the foam layer 61.

[0125] The non-aqueous solvent is a solvent other than water, and includes, for example, a volatile organic compound (○○), and preferably has a boiling point lower than the foaming temperature, for example, lower than 200 °O. Certain compounds are preferred. Examples of the non-aqueous solvent include lacton-based solvents and glycol ether solvents. The lactone-based solvent is preferable because it has high solubility in vinyl chloride resin, acrylic resin, urethane resin, ethylene-vinyl acetate copolymer and the like. The glycol ether solvent is suitable for vinyl chloride resin. Since these non-aqueous solvents dissolve the first thermoplastic resin such as vinyl chloride resin, they dissolve or disperse the foaming inhibitor in the foaming-suppressing ink and at the same time on the printing media 60. The foam suppressor is permeated into the foam layer 61 to change the foamability of the foam layer 61.

[0126] Examples of the lactone solvent include arbutyrolactone,

Caprolactone and the like can be mentioned, and in that the viscosity of the ink obtained can be a viscosity suitable for ink jet printing,

Caprolactone is preferred.

[0127] Examples of the glycol ether solvent include ethylene glycol, diethylene glycol, diethylene glycol ethyl methyl ether, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, propylene glycol monobutyl ether, and dipropylene glycol butyl ether. However, diethylene glycol ethyl methyl ether is preferable from the viewpoint of the drying property of the foam suppression ink after ink jet printing.

[0128] As the non-aqueous solvent, one kind may be used alone, or two or more kinds may be used, but it is preferable to use the lacton-based solvent and one or more kinds of glycol ether solvents in combination. 〇 2020/175 270 30 boxes (: 170? 2020/006511

[0129] Compared with the plasticizer, the non-aqueous solvent has a higher ability to permeate the foaming inhibitor into the first thermoplastic resin (for example, a soft vinyl chloride resin), and the foaming inhibitor can be used in a short time in a short time. It is possible to penetrate to the bottom of the foam layer 61 made of a thermoplastic resin. In addition, the non-aqueous solvent dissolves the first thermoplastic resin, but after drying the non-aqueous solvent, the first thermoplastic resin returns to a solid state, so that the function of the foam layer 61 is not deteriorated. ..

[0130] The proportion of the solvent in the foam suppression ink is preferably 20 to 99% by weight,

More preferably, it is 80 to 95% by weight.

[0131] When a volatile organic compound is used as a solvent, it is preferably contained in a proportion of 50% by weight or more in the solvent. The content of the volatile organic compound in the ink for suppressing foaming is 1% by weight or more, preferably 10% by weight or more, more preferably 20% by weight or more, and particularly preferably 80% by weight. % Or more

[0132] The viscosity of the foaming suppression ink is not particularly limited, but it is preferably about 3 to 18^9a3 which is a viscosity suitable for ink jet printing. The viscosity can be adjusted by changing the solvent composition and ratio.

[0133] (Other ingredients)

The foam suppressing ink may further contain other components. Other components include colorants and surface conditioners.

[0134] (Coloring ink)

The color ink is an ink for ink jet printing containing a colorant and a solvent. The solvent contained in the colored ink is a non-aqueous solvent. The coloring ink is preferably a non-aqueous pigment ink, and particularly preferably a solvent ink. The non-aqueous solvent contained in the colored ink is a solvent other than water, and examples thereof include a volatile organic compound (○○), preferably having a boiling point lower than the foaming temperature, for example, 200 ^° C ^. Compounds that are less than o are preferred. Unlike the foam suppression ink, the non-aqueous solvent contained in the colored ink does not need to be one that melts the foam suppressor and can transfer the foam inhibitor to the foam layer 61. 〇 2020/175 270 31 卩(: 170? 2020/006511

In view of compatibility, it is selected in the same manner as the non-aqueous solvent contained in the foaming suppression ink, and in particular, the same non-aqueous solvent is preferable.

[0135] The ink set used as the coloring ink is not particularly limited as long as it can express a color pattern, but it is 〇 (cyan), IV! (magenta), and 丫 (yellow).

, An ink set having four colors (black). In addition to this,! _〇 (Litcian),! _ 01 (light magenta), 1_

By using (light black), ○ “(orange), (white) and 3 丨 (silver), it is possible to improve the design of the resulting foam.

[0136] Solvent inks that can be used for the coloring ink include solvent ink 3 3 2 1 (colorant; pigment, solvent; organic solvent) manufactured by Mimaki Engineering Co., Ltd. ○ (cyan), IV! (magenta). , 丫 (yellow),

(black)

,! _〇 (Lithian),

(Light magenta), 1_

(Light black), 〇” (orange), (white), 3 丨 (silver), solvent ink mitsubishi 3 4 by Mimaki Engineering Co., Ltd. (colorant; pigment, solvent; organic solvent) 〇 (cyan) ), IV! (Magenta), 丫 (Yellow), Mimi (Black), !_○ (Litcian),

(Light magenta) and the like.

[0137] (Printing process)

The order of printing the foaming suppression ink and the printing of the coloring ink is arbitrary. For example, the colored ink may be printed after printing the foam suppressing ink, the foam suppressing ink may be printed after printing the colored ink, or the foam suppressing ink and the colored ink may be printed in parallel.

[0138] In particular, in order to efficiently print the colored ink and the foaming suppression ink, it is preferable to perform the printing of the colored ink and the printing of the foaming suppression ink in the same step. For example, after printing the foam-suppressing ink, the colored ink is printed without waiting for the foam-suppressing ink to dry, or after printing the colored ink, the foam-suppressing ink is printed without waiting for the colored ink to dry. It is preferable to print on the same location almost at the same time (for example, at intervals of 1 second or less).

[0139] For example, after printing the foam-suppressing ink, coloring ink is not waited for before the foam-suppressing ink is dried. 〇 2020/175 270 32 units (: 170? 2020/006511

A case of printing a link will be described.

[0140] First, the bubbling suppression ink is printed on the bubbling suppression region that forms the recess in the printing medium 60. Since the ink absorbing layer 62 has a high ink absorbing ability, the foam suppressing ink printed in the foam suppressing area is absorbed up to the back surface of the ink receiving layer 62. In FIG. 1 (匕), the foam suppression ink thus absorbed by the ink receiving layer 62 is shown as the foam suppression ink layer 63.

[0141] Next, as shown in Fig. 1 (distance), the image 64 is printed with the colored ink on the foaming suppression region forming the concave portion of the printing medium 60, and the printing medium 60 is printed. Image 65 is printed with colored ink in the non-foaming areas that do not form depressions. Since the ink receiving layer 62 has a high ink absorbing ability, the ink receiving layer 62 absorbs the colored ink to the extent that the ink does not bleed even in the portion corresponding to the foaming suppressing area which has already absorbed the foaming suppressing ink. In addition, since the plasticizer contained in the first thermoplastic resin of the foam layer 61 has not moved to the surface of the ink receiving layer 62, the wettability of the surface by the plasticizer decreases and the foam suppression region and the foam There is no noticeable difference in wetting and spreading between the same colored ink printed at the same print density in the suppression area.

[0142] In addition, when the bubbling suppression ink is printed without waiting for the colored ink to dry after printing the colored ink, or when the bubbling suppression ink and the colored ink are printed almost at the same time, the ink receiving layer 62 is not formed. In the area corresponding to the foam suppression region, as shown in Fig. 1 (well), the foam suppression ink is absorbed up to the back surface and the colored ink is absorbed to the extent that it cannot bleed. On top of that, since the plasticizer contained in the first thermoplastic resin of the foaming layer 61 does not move to the surface of the ink receiving layer 62, the plasticizer lowers the wettability of the surface and suppresses foaming. There is no noticeable difference in the wetting and spreading method between the same colored ink printed at the same print density in the area and the foam non-suppression area.

[0143] As described above, when the bubbling suppression ink and the coloring ink are printed on the printing medium 60, the degree of wetting and spreading of the same coloring ink printed at the same printing density in the bubbling suppression region and the bubbling suppression region. Difference is suppressed. This wet spread 〇 2020/175 270 33 卩 (: 170? 2020 /006511

The difference in the degree is such that the difference between the color of the bubbling suppression area (first color) and the color of the bubbling suppression area (second color) printed with the same color ink with the same printing density is not visible. Is preferred. In particular, the degree of wetting and spreading of the same colored ink printed at the same print density in the foam suppression region and the non-foam suppression region is preferably the same, as shown in FIG.

[0144] From the above, when printing in the same color on the printing medium 60 using the same color ink for the foam suppression region and the foam non-suppression region, the print density of the color ink in the foam suppression region and the foam non-suppression region is increased. Can be the same.

[0145] (Printing device)

Printing of the foaming suppression ink and the coloring ink on the printing medium 60 can be performed by any ink jet printing apparatus that is compatible with the shape of the printing medium 60.

[0146] As such a printing apparatus, for example, a supply means for supplying the printing medium 60, a foaming suppressing ink applying means for ejecting the foaming suppressing ink onto the printing medium 60 by an ink jet method, and coloring if necessary. It is possible to use a printing apparatus provided with a coloring ink applying unit that discharges the coloring ink containing the agent onto the printing medium 60 by the ink jet method.

[0147] In particular, as the printing device, a serial type ink jet printer that prints the bubbling suppression ink and the coloring ink together for each main scan is preferable.

[0148] For the printing apparatus, for example, a known ink jet printer may be modified and used. Specifically, replace one of the colored inks for ink jet with foam suppression ink, prepare color pattern data and concave and convex pattern data separately, and discharge the colored ink and foam suppression ink from each ink head. The uneven pattern and the color pattern are ejected onto the printing medium using a printer driver programmed to do so. As an ink jet printer, for example,

Can be

[0149] (Foam treatment) 〇 2020/175 270 34 卩 (: 170? 2020 /006511

Foaming of the printing medium 60 printed with the foaming suppression ink and the coloring ink can be performed by heating the printing medium 60 at a heating temperature equal to or higher than the foaming temperature. Further, after printing, from the foam suppression ink layer 6 3 absorbed by the ink receiving layer 6 2 and in contact with the foam layer 6 1 to the portion 6 13 of the foam layer 6 1 below it, relatively quickly, The foam suppressant migrates. Therefore, at the time of foaming, the portion 6 13 of the foamed layer 61 to which the foaming inhibitor has migrated is more suppressed in foaming than the surrounding portion. In this way, the recess 63 3 is formed in the printing medium 60.

[0150] The heating temperature is not particularly limited as long as it causes a difference between the thermal decomposition of the region of the foamable resin composition layer to which the foaming suppression ink is applied and the thermal decomposition of the uncoated region. but for example, the range of 1 9 0 ^° 〇 ~ 2 4 0 ^° 〇. When the heating temperature is within this range, the foaming bubbles become fine and the height difference of the uneven pattern of the foam becomes large, which is preferable. The heating time is not particularly limited, but it is, for example, 4 minutes or more when the heating temperature is 1900° 〇 and about 1 minute when the heating temperature is 230° to 240°°. The heating mode is preferably performed without contact with the printing surface.

[0151] (Foaming device)

The foaming of the printing medium 60 includes a supply unit that supplies the printing medium 60, and a heating device that heats the supplied printing medium 60 at a heating temperature equal to or higher than the foaming temperature to foam the printing medium 60. Can be done by.

[0152] It is preferable that the foaming device further comprises an exhausting means for exhausting the plasticizer or the like volatilized from the printing medium 60 by the exhausting means in order to improve the working environment during printing. Especially when the foam suppression ink or colored ink contains V 0 (three components, exhausting the V 0 (three components can improve the working environment during printing).

[0153] (Effect of First Embodiment)

As shown in Fig. 3 (3) to (○), the conventional foamable printing medium 150 prints the foam suppression ink to form the recesses due to the plasticizer protruding on the surface. Even if the same colored ink is printed at the same print density in the bubbling suppression area and the non-foaming non-foaming area, there is a difference in coloring of the colored ink in both areas. 〇 2020/175 270 35 卩 (: 170? 2020 /006511

Out.

[0154] On the other hand, in the printing medium 60 according to the first embodiment, since the plasticizer does not float on the surface of the printing medium 60, it is only necessary to print the same colored ink in the foaming suppression area and the foaming suppression area at the same print density. , Both areas can have the same color.

[0155] (Modification 1)

In the first embodiment, the ink receiving layer 62 is composed of the void type ink receiving layer containing the inorganic fine particles and the binder, but instead of this, the ink receiving layer 62 is composed of a plurality of ink receiving layers, One of the layers may be the void-type ink receiving layer described above. In this case, it is sufficient that a plurality of ink receiving layers as a whole, not the above-mentioned void type ink receiving layer, satisfy the above-mentioned ink absorbing ability.

[0156] (Second Embodiment)

A method for manufacturing a foamed printed material according to the first embodiment will be described. In this manufacturing method, as shown in Fig. 2 (b), by printing the foaming suppression ink and the colored ink on the printing medium 70 by ink jet printing, it is only necessary to heat and foam, and ), a foamable printed matter capable of forming a foam having a desired uneven pattern and an image is manufactured. This manufacturing method mainly performs a foaming suppression ink printing step 3 51 and a colored ink printing step 3 52.

[0157] (Print media)

The printing medium 70 is any foamable medium provided with a foam layer containing a thermoplastic resin containing a chemical foaming agent and a plasticizer.

[0158] For example, as the printing medium 70, as shown in Fig. 2(a), the printing medium 60 according to the first embodiment from which the ink receiving layer 62 is omitted can be used.

[0159] Further, as the print medium 70, the print medium according to the first embodiment is used.

In 60, instead of the ink receiving layer 62, a conventional ink receiving layer through which a plasticizer penetrates may be provided. The ink receiving layer may be a void type or a wet type. 〇 2020/175 270 36 卩 (: 170? 2020 /006511

[0160] In any case, the plasticizer is raised on the surface of the printing medium 70, and the wettability is deteriorated compared to before the embossing. Therefore, when the colored ink is printed on the printing medium 70, the colored ink does not spread so much that, for example, the colored ink droplets are similar to the colored ink droplets forming the image 75 shown on the left side of Fig. 2). Maintain a spherical shape. On the other hand, when the colored ink is printed on the area of the printing medium 70 on which the foam suppression ink is printed, the deterioration of the wettability is canceled by being wet with the foam suppression ink. For example, see the right side of Fig. 2 (匕). The droplets of colored ink wet and spread like the droplets of colored ink that make up image 7 4 shown in FIG.

[0161] (Foam control ink)

The foam suppression ink is any ink for ink jet printing containing a foam suppressing agent that suppresses foaming of the printing medium 70 and a non-aqueous solvent. For example, the foaming suppression ink described in the first embodiment can be used as the foaming suppression ink.

[0162] (Color ink)

Colored ink is any ink jet ink that contains a colorant and a non-aqueous solvent. For example, the coloring ink described in the first embodiment can be used as the coloring ink.

[0163] (Foam suppression ink printing process)

In the bubbling suppression ink printing step 3 51, as shown in FIG. 2B, the bubbling suppression ink is applied to the bubbling suppression ink layer in the bubbling suppression region of the printing medium 70 to suppress the bubbling to form the concave portion. Inkjet printing is performed as 7 3 while printing is not performed in the non-foaming suppression area of the print media 70 that does not suppress foaming.

[0164] After printing, from the foam suppression ink layer 7 3 to the part 7 1 of the foam layer 7 1 below it.

The foam suppressant migrates to 3 relatively quickly. Therefore, when the printed printing media 70 shown in Fig. 2 (b) is foamed, the foaming layer 7 1 part 7 1 ₃ to which the foaming inhibitor has transferred suppresses foaming more than the surrounding parts. It In this way, as shown in FIG. 2 (o), the recess 73 3 is formed in the printing medium 70. 〇 2020/175 270 37 卩(: 170? 2020/006511

[0165] (Colored ink printing process)

In the colored ink printing step 3 52, the colored ink is printed as an image 7 4 in the bubbling suppression region and as an image 75 in the bubbling suppression region as shown in FIG.

[0166] As described above, since the degree of wetting and spreading of the colored ink is different between the foam suppression region and the foam non-suppression region, the same color ink is printed at the same print density, as shown in Fig. 2 (well). However, they do not have the same color. Therefore, in the colored ink printing process 3 52, when the same color ink is used to print the foam suppression region and the foam non-suppression region, the color ink is printed in the foam suppression region and the foam non-suppression region. Change the density so that both areas print in the same color.

[0167] In particular, the print density of the foam suppression ink to be printed in the foam suppression area is the first print density, and the print density of the colored ink to be printed in the foam suppression area is the second print density, and the foam non-suppression area is printed. Set the print density of the colored ink to the third print density, the foam suppression ink and the color of the foam suppression area after printing the color ink to the first color, and the color of the foam non-suppressed area after printing the colored ink. When used as the second color, the second print density is adjusted so that there is no visible difference between the first and second colors (e.g. lighter than the third print density). It is preferable.

[0168] Furthermore, the second print density is preferably determined based on the desired color (particularly, the reflection density) and the first print density.

[0169] For example, for each color ink, prepare a correspondence table of the desired color and the corresponding second print density for each first print density, and set the desired color and the first print density. From this, the second print density when printing the colored ink in the foaming suppression region may be obtained.

[0170] Further, for example, for each color ink, a function that can obtain the second print density corresponding to the desired color from the desired color is prepared, and the second print density is calculated based on the function. The print density of may be obtained. For example, such a function prints on a printing medium 70 a foaming suppression ink at a specific first print density and a colored ink for which a function is to be created at a plurality of second print densities, and at each second print density. To It can be obtained by measuring the reflection density of the printed color with a fluorescence spectrodensitometer and finding the second printing density corresponding to it from the printed color by polynomial approximation.

[0171] Such adjustment of the print density may be performed at any stage from the stage of creating image data representing the image to be printed to the stage of actually printing the image using the colored ink.

[0172] For example, when creating or editing image data of an image to be printed with image creation software, or when creating image data for printing with a RIP (Raster Image Processor) software, the image data The color change filter for adjusting the print density described above may be applied to the portion corresponding to the concave portion.

[0173] Further, based on the image data including the print density data of the colored ink for each print position and the emboss data including the print density data of the foam suppress ink for each print position, the color ink and the foam suppress ink are selected. , When printing on the printing medium 70 with the inkjet printing device, the control unit of the inkjet printing device determines the print density when printing the colored ink at a certain printing position to the image data corresponding to the printing position. It may be determined based on the above and the emboss data, for example, by referring to the above correspondence table or using the above function. Print density can be adjusted by increasing or decreasing the dot density and/or dot volume.

[0174] Further, when the colored ink and the foam-inhibiting ink are printed on the printing medium 70 by the inkjet printing device based on the above-mentioned image data and emboss data, the foaming is performed using the image data and the emboss data. The print density in the suppression area is changed in various ways (for example, the print density in the foam suppression area is changed to the saturated print density of the colored ink that is the same as the print density of the colored ink specified in the image data corresponding to the foam suppression area). Several points (preferably three points, four points, or five points or more) between them, and a plurality of test patterns obtained by printing the colored ink and the foam suppression ink on the printing medium 70 The color is measured automatically or manually with a spectral densitometer and based on the reflection density of the foam suppression region between test patterns. 〇 2020/175 270 39 卩 (: 170? 2020 /006511

Therefore, the print density of the colored ink in the foam suppression region may be adjusted. For example, the print density in the bubbling suppression area is set as the printing density of the colored ink 31 specified by the image data corresponding to the bubbling suppression area, the printing density of the saturated printing density of the colored ink 35, the printing density 3 If you want to create 5 different test patterns with different print densities 3 2, 3 3 and 3 4 that exist between 1 and print density 35, print density 3 1 to 3 5 The correlation between the reflection densities 131 to 5 of the foam suppression region in the test pattern in which the color ink is printed in the foam suppression region is approximated by a polynomial (for example, cubic equation), and the target expression is obtained by the approximation formula thus obtained. The print density of the colored ink with respect to the reflection density in the bubble suppression area can be calculated.

[0175] (Print order)

The order of the foaming suppression ink printing step 3 51 and the colored ink printing step 3 52 is arbitrary. For example, the foaming suppression ink printing step 3 51 is followed by the colored ink printing step 3 52, the coloring ink printing step 3 52 is followed by the foaming suppression ink printing step 3 5 1, or the foaming suppression ink printing step 3 5 1. 3 5 1 and the coloring ink printing process 3 5 2 may be performed in parallel.

[0176] In particular, in order to print the colored ink and the foaming suppression ink efficiently, it is preferable that the foaming suppression ink printing step 3 51 and the coloring ink printing step 3 52 are performed in the same step. For example, after the foaming suppression ink printing step 3 51, the coloring ink printing step 3 52 is performed without waiting for the foaming suppression ink to dry, or after the coloring ink printing process 3 52 is completed, the coloring ink is foamed without waiting for the drying. By performing the suppression ink printing process 3 5 1 or by printing the foaming suppression ink and the coloring ink on the same place almost at the same time (for example, at intervals of 1 second or less), the foaming suppression ink printing process 3 5 1 and the colored ink It is preferable to perform the printing step 3 52 at the same time.

[0177] (Printing device)

The foaming suppression ink printing step 3 51 and the colored ink printing step 3 52 can be performed by any ink jet printing apparatus that is suitable for the shape of the printing medium 70. 〇 2020/175 270 40 卩 (: 170? 2020 /006511

[0178] For example, as an ink jet printing apparatus, a print medium 70 is provided with a first print head that ejects a foam suppression ink by the ink jet method, and a print medium 70 is provided with a colored ink. By controlling the second print head that ejects ink by the ink jet method, and the first print head and the second print head, the foam suppression ink is printed and the foam suppression area is not printed. In order to print the non-suppression area in the same color with the colored ink, an ink jet printing device having a control unit that changes the print density for printing the colored ink with the foam suppression area and the foam non-suppression can be adopted. ..

[0179] For example, the printing apparatus described in the first embodiment can be adopted.

[0180] (Use of effervescent printed materials)

By heating the foamed printed matter manufactured as described above to a heating temperature equal to or higher than the foaming temperature to foam, a desired uneven pattern and an image were printed as shown in Fig. 2 (○). A foam can be produced. The foaming process can be performed in the same manner as in the first embodiment, for example.

[0181] (Effects of the second embodiment)

As shown in Fig. 3 (3) to (○), the conventional foamable printing medium 150 prints the foam suppression ink to form the recesses due to the plasticizer protruding on the surface. Even if the same colored ink is printed at the same print density in the foaming suppression area and the non-foaming non-foaming area, there is a difference in coloring of the colored ink in both areas.

[0182] On the other hand, in the method for producing a foamed printed material according to the second embodiment, when the foaming suppression area and the foaming non-suppression area are printed in the same color with the same coloring ink, The print density of the colored ink is changed in both areas so as to cancel the difference in coloring of the colored ink in both areas. As a result, even in a printing medium in which the plasticizer is raised on the surface, for example, the conventional printing medium 150, the foam suppression region and the foam non-suppression region can be printed in the same color with the same color ink.

[0183] (Modification 2)

In the second embodiment, instead of the printing medium 70, the first embodiment is used. 〇 2020/175 270 41 卩 (: 170? 2020 /006511

The printing medium 60 according to the embodiment may be used. In this case, in the printing medium 60, it is possible to further eliminate the color difference when the bubbling suppression region and the bubbling suppression region are printed with the same printing density at the same printing density.

[0184] (Example)

(Example 1)

Using an ink jet printer ("300, manufactured by Mimaki Engineering Co., Ltd.), a foam-suppressing ink (2, 2'1 [[(methyl-1 1 ^~ 1 _benzotriazol 1-yl)methyl]imino] was added to the printing medium. ] A mixture of 20% by weight of bisethanol, 10% by weight of a_ptyrolactone, 70% by weight of diethylene glycol methyl ethyl ether) and yellow ink (33321, manufactured by Mimaki Engineering Co., Ltd.) at various printing densities. Printed. The temperature of the ink jet printer heater was set to 50° for the blur heater, 45° for the print heater, and 60° for the post heater. In addition, the printing resolution was set to 540,720, and printing was performed in eight times (8 passes).

[0185] The printing medium is a high-quality paper (base material) with a thickness of 0.1 .0!

What was coated with was used. This foamable resin composition contains 4 parts by weight of azodicarbonamide (chemical blowing agent), 4 parts by weight of zinc stearate (foaming auxiliary agent), 40 parts by weight of calcium carbonate (filler), magnesium hydroxide. A mixture of 50 parts by weight of (flame retardant), 50 parts by weight of isononyl phthalate (plasticizer) and 100 parts by weight of vinyl chloride resin (thermoplastic resin) was used.

After printing, the reflection density of yellow on the printed surface of each medium was measured with a fluorescence spectral densitometer (fluorescence spectral densitometer 0-5, manufactured by Konica Minolta). Figure 4 shows the measurement results.

[0187] From the results of Example 1, it can be seen that even if the print density of the yellow ink is the same, the higher the print density of the foam suppression ink, the higher the reflection density, that is, the color looks darker. In addition, using this result, the print density of the yellow ink, which is necessary to obtain the same reflection density with different print densities of the foam suppression inks, is used. 〇 2020/175 270 42 卩 (: 170? 2020 /006511

The degree can be specified. For example, if the print density of the foam control ink of 3.2 _^9/2, and 1 4.3 ₉ / Rei_1 ^2, to the reflection density of 1, it respectively, about the print density of the yellow ink Four

And about 3

And it is sufficient

[0188] (Example 2)

Gravure coating the above printing media with a coating solution consisting of an aqueous emulsion of polyester, porous calcium carbonate and a dispersant.

D. The same as Example 1 except that the ink-receiving layer was printed. Figure 5 shows the measurement results.

[0189] From the results of Example 2, it is found that the printing medium provided with the ink receiving layer can obtain the same reflection density if the printing density of the yellow ink is the same regardless of the printing density of the foam suppression ink. I understand.

Explanation of symbols

[0190] 1 Foam products

1 0 foam media

1 〇 1st part (foaming part)

1 ○ 6 2nd part (non-foamed part)

1 1 Base material

1 2 foam layer

1 00 printer

1 1 0 Inkjet head

1 20 Drive mechanism

1 30 controller

1st image

2 Second image

60, 70, 1 50 Printing media

6 1, 7 1, 1 5 1 Foam layer

6 1 3, 7 1 3, 1 5 1 3 Foam layer under the foam control layer 〇 2020/175 270 43 卩 (: 170? 2020 /006511

62 Ink receiving layer

63, 73, 1 53 Foam suppression ink layer

638, 738, 1 533 recess

64, 74, 1 54 Image on foam suppression area

65, 75, 1 55 Image on non-foam suppression area

35 1 Foam control ink printing process

352 Colored ink printing process

3 1 to 35 Print density

匕1〜匕5 Reflection density

Claims

\¥0 2020/175 270 44 卩(: 17 2020/006511 Claims

[Claim 1] An ink ejecting unit that ejects colored ink onto the foaming medium while moving relative to the foaming medium before foaming, and the ink ejecting unit based on image data representing an image. A controller that prints the image on the foamed medium by moving the foamed medium relative to the foamed medium and ejecting the colored ink; and the foamed medium includes a first portion that foams, The second part that does not foam more than the first part is set,

The controller is configured such that the first image printed on the first portion of the image and the second image printed on the second portion are closer to the same color after foaming of the foamed medium than before foaming. The ejection amount of the colored ink when the first image is printed is different from the ejection amount of the colored ink when the second image is printed,

Printer.

[Claim 2] The image data indicates a discharge amount of the colored ink for each pixel of the image,

The controller is

When the first image and the second image in the image represented by the image data have the same color, the ejection amount of each pixel of the first image, which is indicated by the image data, and the second image At least one of the ejection amount of each pixel and is changed, and the colored ink is ejected to the ink ejecting unit with the changed ejection amount,

The discharge amount after the change is the density of the color of the actually printed first image after foaming of the foamed media and the color density of the actually printed second image after foaming of the foamed media. Concentration and 〇 2020/175 270 45 卩 (: 170? 2020 /006511

The printer according to claim 1, wherein the ejection amount is similar to that when not performing.

[Claim 3] The first portion after foaming has a beveled edge,

The controller outputs image data representing an image of a portion to be printed on the edge portion of the first image to an image or a portion to be printed on the edge portion in which the colored ink is not ejected more than the image. Change to image data that represents a lighter color image than

The printer according to claim 1 or 2.

[Claim 4] Based on image data representing an image, a color ink is ejected to a foamed medium before foaming, and a printing step for printing the image on the foamed medium is provided,

In the printing step, the first image printed on the first portion of the image and the second image printed on the second portion are closer to the same color after foaming of the foamed media than before foaming, The ejection amount of the colored ink when printing the first image is made different from the ejection amount of the colored ink when printing the second image,

Printing method.

[Claim 5] The image data indicates a discharge amount of the colored ink for each pixel of the image,

In the printing step,

The colored ink is ejected to the ink ejection portion at the ejection amount indicated by the image data,

When the first image and the second image in the image represented by the image data have the same color, the image data indicates the ejection amount of each pixel of the first image, and the second portion At least one of the discharge amount of each pixel and is changed, and the ink discharge unit is changed with the changed discharge amount. 〇 2020/175 270 46 卩 (: 170? 2020 /006511

Eject the colored ink onto

The discharge amount after the change is the density of the color of the actually printed first image after foaming of the foamed media and the color density of the actually printed second image after foaming of the foamed media. The printing method according to claim 4, wherein the density and the ejection amount are similar to each other compared to when the change is not performed.

[Claim 6] A foam layer containing a first thermoplastic resin containing a chemical foaming agent and a plasticizer,

An ink receiving layer formed on the foam layer,

Equipped with

The printing medium, wherein the binder is a second thermoplastic resin having an ability to prevent migration of the plasticizer to the surface of the ink receiving layer.

[Claim 7] (a) A foaming suppressing ink containing a foaming suppressing agent for suppressing foaming in the foaming layer and a non-aqueous solvent is printed at a first printing density in a foaming suppressing area in the ink receiving layer. When a colored ink containing a colorant and a non-aqueous solvent is printed in the foam suppression region at a second print density, the color of the foam suppression region is changed to a first color,

(Case) When the colored ink is printed in the foaming suppression area at the second printing density and the foaming suppression ink is not printed in the foaming suppression area, the color of the foaming suppression area is set to the second color. If you choose color

The printing medium according to claim 6.

[Claim 8]

With the first color 〇 2020/175 270 47 卩 (: 170? 2020 /006511

The color difference of the second color is 3 or less,

The printing medium according to claim 7.

[Claim 9] Among the printing media having a foam layer containing a thermoplastic resin containing a chemical foaming agent and a plasticizer, the foam suppressing region has a foam suppressing agent for suppressing foaming in the foam layer. A foaming suppression ink containing a non-aqueous solvent and an ink jet printing, in a foaming non-suppression area other than the foaming suppression area, a first printing step in which the foaming suppression ink is not printed,

A second printing step of printing a colored ink containing a colorant and a non-aqueous solvent on the printing medium, wherein the foaming suppression region and the foaming suppression region are printed in the same color with the coloring ink. In order to change the print density for printing the colored ink in the foam suppression region and the foam non-suppression region, a second printing step,

A method for producing an effervescent printed matter containing:

[Claim 10] A printing medium having a foaming layer containing a thermoplastic resin containing a chemical foaming agent and a plasticizer contains a foaming inhibitor for suppressing foaming in the foaming layer and a non-aqueous solvent. The first print head that ejects the foaming suppression ink that is generated by the ink jet method,

A second print head for ejecting a coloring ink containing a colorant and a non-aqueous solvent onto the printing medium by an ink jet method, the first print head and the second print head. In order to print the same color with the coloring ink, the heads are controlled so that the foaming suppressing area where the foaming suppressing ink is printed and the foaming suppressing area where the foaming suppressing ink is not printed are printed in the same color. A control unit that changes the print density for printing the colored ink in the area and the foam non-suppression area;

Have

Inkjet printing device.