JP2016124216A - Inkjet printing transfer sheet for rubber molding or urethane molding and inkjet printing transfer method for rubber molding or urethane molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inkjet printing transfer sheet and a printing method for transferring rubber molding or urethane molding which dispense with screen platemaking and enable inkjet printing on the surface of a rubber molding.SOLUTION: An inkjet printing transfer sheet for rubber molding or urethane molding includes a release sheet 110, an ink acceptance layer 120 for inkjet, an inkjet printing layer 130 and a screen ink printing layer 140. The ink acceptance layer 120 for inkjet is a film on which a resin material containing a rubber-based resin having acceptance to ink for inkjet and light transmissivity is coated. The inkjet printing layer 130 is a layer on which a mirror image of a printing image is inkjet printed with inkjet ink. The screen ink printing layer 140 is a layer which is applied by screen printing using screen ink containing the rubber-based resin having affinity to a rubber. A printed matter is transferred to a rubber-based molding from the screen ink printing layer 140, and the peeling sheet 110 is peeled.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for printing characters, symbols, images, and the like on a surface of various rubber-based molded products such as tires, rubber mats, wet suits, rubber shoes, rubber gloves, rubber hoses, rubber belts, and the like.

There are various types of rubber molded products such as tires, rubber mats, wet suits, rubber shoes, rubber gloves, rubber hoses, rubber belts, etc., and various characters, symbols, images, etc. on the surface of the rubber molded products There is a need to print.
As a printing method on a rubber-based molded product in the prior art, there are a printing method by imprinting unevenness and a printing method using ink. The former includes concave printing using a stencil, and the latter includes screen printing using rubber ink.

Intaglio printing using stencils in the prior art is made by producing a stencil stamped on a steel or aluminum plate and sticking it to the unvulcanized rubber surface, or attaching it to a mold and vulcanizing the rubber. A concave display was formed on the product. There is also a technique for performing concave printing without using a stencil (Japanese Patent Application No. 08-216628).
However, this type of concave printing using a stencil requires a stencil plate to be manufactured and is costly. Therefore, it is used when printing a large amount of the same characters, but is not suitable for printing a wide variety of products. Affixing the stencil to a rubber product or attaching it to a mold is dependent on human hands, which hinders automation and unmanned production of rubber products. In addition, the concave printing using a stencil does not give a color and lacks visibility.

  Next, printing using ink in the prior art will be described. In general, high-quality printing on rubber-based molded products is considered difficult. This is because rubber is a material that has poor adhesiveness and poor adhesion to other substances. For this reason, it has been pointed out that when printing is performed using a general printing paint, it easily peels off due to the property of rubber which is difficult to adhere (Japanese Patent Application No. 2006-8895).

Hereinafter, a screen printing process on the surface of a rubber-based molded product in the prior art will be briefly described.
(1) Production of screen plate making A positive film to be used as a printing plate is created.
A positive film serving as a plate is superimposed on a screen plate coated with a light-sensitive emulsion (for example, a diazo photosensitizer and PVA) over the entire surface, and exposed to ultraviolet rays for exposure.
When washed with water, the photosensitive emulsion is not cured from the positive film, but is washed away with water to open a hole, and the exposed portion is cured and sealed to complete the screen plate making.

(2) Screen printing on release sheet Prepare a release sheet. For example, a paper or PET film or the like coated with a release agent may be used.
As the ink, a so-called screen ink having high affinity with rubber is used. There are limited inks that are compatible with rubber moldings. They are sometimes called rubber inks. For example, what added the heat resistant and light-resistant inorganic pigment and additive with respect to resin which has a main material of a hyperon rubber system is known.
In the prior art, a method of printing characters, symbols, images, etc. by screen printing on the surface of a rubber-based molded product using this screen ink has been adopted.
In this way, screen printing is superposed on the release sheet, and screen ink having high affinity with rubber is imprinted with a spatula for printing. This completes the transfer version.

(3) Transfer to rubber-based molded product A transfer plate is brought into close contact with the surface of a rubber-based molded product such as a tire, and heat is applied to perform thermal transfer (for example, 130 ° C. to 150 ° C.).
When the release sheet is peeled off, the screen ink having a high affinity with the rubber printed on the transfer plate is thermally transferred to the surface of a rubber-based molded product such as a tire, and printing is completed.

Japanese Patent Application No. 2006-8895 Japanese Patent Application No. 08-216628

Screen printing on rubber-based molded products using the conventional rubber ink has the following problems.
The first problem is the time and cost required for the production of screen plate making.
Compared to a stencil that engraves a metal plate, screen plate making can be easily produced, but the production is laborious and costly, so it is also unsuitable for printing a small lot. If printing on the surface of a rubber-based molded product that does not require screen plate making is possible, it is advantageous because time and cost can be saved in small-lot printing.
As printing that does not require screen plate making, there is generally an ink jet printing method. However, since the inkjet printing technology is a technology that instantaneously ejects a very small amount of ink from an extremely fine nozzle, the ink that can be used in an inkjet printer is limited. So-called rubber ink cannot be used in an inkjet printer because of its high viscosity. It is. Therefore, it is said that ink jet printing using a rubber ink suitable for a rubber-based molded product cannot be performed.

  The second problem is a problem of deterioration of printing due to the low heat resistance and light resistance of rubber ink. In both screen printing and inkjet printing, multicolor printing is the overprinting of four basic colors of yellow, cyan, magenta, and sumi, of which yellow and magenta have low heat resistance and light resistance. Even after heat treatment such as vulcanization, there is a problem that deterioration proceeds when printing is performed on a rubber-based molded product.

Accordingly, the present invention has been made in view of the above problems, and is an inkjet for transferring a rubber-based molded product or a urethane-based molded product that enables inkjet printing on the surface of a rubber-based molded product, which has been impossible in the prior art. An object of the present invention is to provide a printing transfer sheet and a printing method using the sheet, eliminate the need for screen plate making, save time and cost, and enable printing suitable for small lot printing.
Moreover, even if the heat resistance and light resistance of the rubber ink, which has been a problem in the prior art, are low, the ink jet printing transfer for transferring the rubber-based molded product or urethane-based molded product that can supplement the heat resistance and light resistance. It is an object to provide a sheet and a printing method using the sheet.

  In order to achieve the above object, the ink jet printing transfer sheet for rubber-based molded products or urethane-based molded products of the present invention is receptive to ink-jet ink on the release sheet and the upper surface of the release sheet. An ink jet ink receiving layer formed by coating a resin material containing a light rubber-based resin, and an ink jet printed on the upper surface of the ink jet ink receiving layer with a mirror image of the printed image using the ink jet ink A printing layer, and a screen ink printing layer that is screen-printed using a screen ink containing a rubber-based resin having affinity for rubber and a pigment on the upper surface of the inkjet printing layer; Is it the surface of the screen ink printing layer for the urethane molded product to be transferred? Is intended to rolling wear peeled the release sheet is transferred.

With the above configuration, high-resolution image printing can be performed by inkjet printing, and an image can be displayed with an inkjet printer on the surface of a rubber-based molded product or a surface of a urethane-based molded product, which has conventionally been impossible. . Further, screen plate making which has been conventionally required is not necessary.
In addition, a high-definition printed image is sandwiched from above and below by an ink-jet ink receiving layer containing a rubber-based resin that has an affinity with a rubber-based molded product and a urethane-based molded product, and a screen ink printed layer containing the rubber-based resin. Therefore, it is possible to stabilize the ink jet image and suppress the progress of ink deterioration.

  In addition, it is possible to devise about the color of a screen ink printing layer here. If the color of the screen ink layer is a color having a high contrast ratio with the color of the inkjet ink, the visibility of the inkjet ink can be improved after transfer to the molded product. For example, if the color of the screen ink printing layer is any one of white, silver, gray, yellow, cream, light color, or a combination thereof, the contrast with the ink-jet ink color is increased. As an example, if the color of the screen ink printing layer is white, and if the color of the inkjet ink layer formed on the upper surface is a dark color, the character or design written in the dark ink will be used. The outline will appear clear.

  The color of the screen ink print layer may be a single color on the entire surface, or may be a different color for each small area obtained by dividing the inkjet print layer into small areas. If the different areas are colored differently, the outline of a multi-colored image, such as a color-coded image, for example, the character part is green, the background is the claim color, the mark design part is red, and the background is white, is distinct and has a different texture. Visual effects can be given.

  Furthermore, in the above-mentioned ink jet printing transfer sheet, the ink receiving layer for ink jet exposed on the surface after transfer is a resin material including screen ink, rubber material and additives, so that the transfer to a rubber molded product is beautiful. It is preferable that it can be made.

  In addition, after the transfer, in order to see the ink jet printing layer image in the lower layer through this ink jet ink receiving layer, it is preferable that the ink jet ink receiving layer is translucent. A film coated with a thickness that can ensure translucency is preferable.

  If it is the said structure, the inkjet printing transfer sheet for rubber-type molded products of this invention is between the ink-receiving layer for inkjets in which rubber-type resin is included, and the screen ink printing layer in which rubber-type resin is included. In addition, since the inkjet printing layer is sandwiched, the inkjet image is stable, and the progress of ink deterioration can be suppressed.

  Next, in the method for printing on a rubber-based molded article of the present invention, an ink-jet ink receiving layer is formed by coating a rubber-based resin that is receptive to ink-jet ink and translucent on the upper surface of the release sheet. In addition, an inkjet printing layer obtained by performing inkjet printing of a mirror image of a printed image with inkjet ink is provided on the upper surface of the inkjet ink receiving layer, and a screen ink having an affinity for rubber is used on the upper surface of the inkjet printing layer. A screen ink printing layer having been subjected to screen printing is provided and transferred from the surface of the screen ink printing layer to the transferred rubber-based molded product or urethane-based molded product, and the release sheet is peeled off and transferred. Is the method.

  According to this printing method, a high-definition image can be printed with ink by ink jet printing, and the high-definition image is transferred to a rubber-based molded product so that the image is visible on the surface of the rubber-based molded product. Can be. A screen plate that is required in the conventional printing method is not necessary, and ink that has been limited to rubber ink in the past can be used in ink jet printers.

  According to the ink jet printing transfer sheet for rubber-based molded products according to the present invention, high-resolution image printing can be performed by ink-jet printing. Image display is possible. Further, screen plate making which has been conventionally required is not necessary. In addition, since the high-definition printed image is sandwiched from above and below by an ink-jet ink receiving layer containing a rubber-based resin that has an affinity for a rubber-based molded product and a screen ink printing layer, the ink-jet image is stabilized, and ink deterioration occurs. It is also possible to suppress the progress.

It is a figure which shows simply the structure of the inkjet printing transfer sheet 100 for rubber-type molded products which concerns on Example 1 of this invention. It is a figure which illustrates simply the process of manufacturing the inkjet printing transfer sheet 100 for rubber-type molded products which concerns on Example 1 (the 1). It is a figure which illustrates simply the process of manufacturing the inkjet printing transfer sheet 100 for rubber-type molded products which concerns on Example 1 (the 2). It is a figure which shows the mode of transfer to the surface of the rubber-type molded product 200 of the inkjet printing transfer sheet 100 for rubber-type molded products. It is a figure which shows a mode that the inkjet printing transfer sheet 100 for rubber-type molded products of this invention was transferred on the surface of the rubber-type molded product 200. FIG. It is a figure which shows simply the structure of the inkjet printing transfer sheet 100a for rubber-type molded products which concerns on Example 2 of this invention. It is a figure which shows a mode that the inkjet printing transfer sheet 100a concerning Example 2 was transferred on the surface of the rubber-type molded product 200 which is a molded product for transfer. It is a figure which illustrates simply the device which improves the contrast ratio with respect to a multicolor image by diversifying the color of the screen ink printing layer.

  Hereinafter, embodiments of an inkjet printing transfer sheet and method for rubber-based molded products or urethane-based molded products according to the present invention will be described with reference to the drawings. However, it goes without saying that the scope of the present invention is not limited to the specific application, shape, number, etc. shown in the following examples.

FIG. 1 is a view simply showing the structure of an inkjet printing transfer sheet 100 for a rubber-based molded product according to Example 1 of the present invention.
FIG. 2 to FIG. 3 are diagrams for briefly explaining the process of manufacturing the inkjet printing transfer sheet 100 for a rubber-based molded product according to the first embodiment.
Hereinafter, a rubber-based molded product will be described as an example of a molded product for transfer, but the same applies even if the material to be transferred is a urethane-based molded product.

As shown in FIG. 1, the ink jet printing transfer sheet 100 for a rubber-based molded product includes a release sheet 110, an ink jet ink receiving layer 120, an ink jet printing layer 130, and a screen ink printing layer 140. .
Each component will be described below, but will be described in the order of the manufacturing process.

First, as shown in FIG. 2A, first, a release sheet 110 coated with an ink-jet ink receiving layer 120 is prepared.
The release sheet 110 may be ordinary paper or a resin sheet such as PET (polyethylene terephthalate).
As will be described later, the release sheet 110 is peeled off after being transferred onto the surface of the rubber-based molded product 200, but a release agent is applied to the surface of the release sheet 110 so that the release sheet 110 can be easily peeled off at that time.
The size of the release sheet 110 needs to be larger than the size of the printed image, and it is preferable to prepare a size having a certain margin.
An ink-jet ink receiving layer 120 is provided on the upper surface of the release sheet 110.

The ink-jet ink receiving layer 120 is formed by coating a rubber-based material having a receptivity on which ink can easily be placed without repelling the ink-jet ink.
Specifically, the ink-receiving layer 120 for inkjet includes a screen ink, a rubber material, and an additive.

  Screen ink is generally used for screen printing and can be applied to various non-penetrating plastic products. It can be printed even if the shape of the substrate is curved, and the surface can be smooth or rough. There are few restrictions on printing. There are a variety of screen inks on the market, but the basic binder composition of the screen ink is a blend of resin, solvent and adjuvant.

Here, since the screen ink itself blended in the ink-jet ink receiving layer 120 is receptive to the pigment ink, the ink-jet ink receiving layer 120 is receptive to the pigment ink. Due to this property, as will be described later, the ink can be received on the ink-jet ink receiving layer 120 without repelling the pigment ink printed by the ink-jet printer using the pigment-based ink.
For example, a hyperon screen ink is preferable.

  In addition, the ink-jet ink receiving layer 120 of the present invention contains a rubber-based material in the formulation in order to increase the affinity with the rubber-based molded product. If the ink-receiving layer 120 for ink jet contains a rubber material, the affinity with the screen ink printing layer 140 containing the rubber material is also increased.

  As a resin often used as a rubber material, natural rubber, acrylonitrile butadiene rubber, styrene butadiene rubber, chloroprene rubber, ethylene propylene rubber, fluorine rubber, silicon rubber, urethane rubber, butyl rubber are often used as rubber sheet materials. Or any combination thereof. The blending of these rubber materials and additives can be finely adjusted according to the material of the rubber-based molded product, use conditions, processing conditions, ink for an ink jet printer, and the like.

  Here, in blending the rubber material and the additive of the ink-jet ink receiving layer 120, the ink-jet ink receiving layer 120 must be prepared so as to ensure translucency. As will be described later, when transferring to the rubber-based molded product 200, the transfer is performed from the screen ink printing layer 140 side, and the ink-jet ink receiving layer 120 side is located on the surface side to cover the ink-jet printing layer 130. In order to visualize the ink jet printing layer 130, the ink receiving layer 120 for ink jet needs to have translucency.

  The ink-jet ink receiving layer 120 is preferably a film coated with a thickness capable of ensuring translucency as a whole of the ink-jet ink receiving layer 120. When the material has a high light-transmitting property, sufficient light-transmitting property can be obtained even when the ink-jet ink receiving layer 120 is thick. However, the material has a low light-transmitting property and the ink-jet ink receiving layer 120 has a large thickness. In some cases, the printed image may appear slightly dull. Therefore, it is preferable to adjust the translucency and thickness of the material of the ink-jet ink receiving layer 120.

  Next, as shown in FIGS. 2B to 2C, a mirror-positive image of an image to be printed on a rubber-based molded product is printed on the ink-jet ink receiving layer 120 by an ink-jet printer, and the ink-jet printing layer is printed. 130 is formed.

  The ink jet printing layer 130 is a layer printed on the ink jet ink receiving layer 120. As described above, since the ink-receiving layer 120 for ink-jet is receptive to the pigment ink in the screen ink itself, the ink-receiving layer 120 for ink-jet is receptive to the pigment ink, so that the ink of the ink-jet printer can be placed beautifully. The pigment ink is easy to fix.

  There are a variety of pigment-based inks that can be used in ink jet printers, and the use of ink jet printers greatly expands the degree of freedom of images to be printed. For example, there is an advantage that a high-definition color image can be printed. Further, since printing can be performed in a non-contact manner, there is an advantage that a member such as screen plate making in screen printing becomes unnecessary.

  In the prior art, printing with an ink jet printer could not be performed on the surface of a rubber-based molded product. This is because the surface of the rubber-based molded product has poor adhesion, poor adhesion to other substances, and cannot be fixed even with pigment ink. For this reason, it has been considered that an inkjet printer cannot be used for printing on the surface of a rubber-based molded product in the prior art. However, in the present invention, since printing is performed on the ink-jet ink receiving layer 120 coated with screen ink having receptivity to the pigment ink, printing by an ink-jet printer can be used.

By using the ink jet printer in this way, members such as screen plate making become unnecessary, and even a variety of small lot printing can be used.
The image to be printed is a mirror image of the image to be printed on the surface of the rubber-based molded product. As will be described later, the image is reversed because it is finally transferred to the surface of the rubber-based molded product. Therefore, it is necessary to print an image that is mirror-inverted at the time of image printing.
As shown in FIGS. 2B to 2C, a mirror image of an image desired to be printed on the surface of the rubber-based molded product can be printed with high-definition ink using an ink jet printer.

Next, as shown in FIG. 3, a screen ink printing layer 140 is printed on the inkjet printing layer 130.
The ink used for the screen ink printing layer 140 is a screen ink containing a rubber-based resin having an affinity for rubber. Since the screen ink originally contains the pigment ink, the compatibility with the ink jet printing layer 130 is good. Moreover, since the rubber-type raw material is contained, the adhesiveness with the rubber-type molded product 200 is ensured. That is, the screen ink printing layer 140 can be bonded in a stable manner by being interposed between the inkjet printing layer 130 and the surface of the rubber-based molded product 200.

Although the printing method of the screen ink printing layer 140 is not limited, it is convenient to apply it quickly by screen printing because it may be applied uniformly to the upper surface of the inkjet printing layer 130. In other words, if the screen plate making used is the screen plate making which is not coated with a photosensitive emulsion without exposure or the like, the screen ink printing layer 140 can be quickly and uniformly printed on the upper surface of the inkjet printing layer 130. can do.
In this configuration example, as shown in FIG. 3A, a screen plate making 300 is prepared, and the ink used for the screen ink printing layer 140 is put into the screen plate making 300.

Next, as shown in FIG. 3B to FIG. 3C, the ink falls by passing through the eyes of the screen plate making 300 by rubbing with a spatula 310. Thereby, the screen ink printing layer 140 is printed on the inkjet printing layer 130.
From the state of FIG. 3 (c), the entire sheet turned upside down is an ink jet printing transfer sheet 100 for a rubber-based molded product.

  As shown in FIG. 1, in an inkjet printing transfer sheet 100 for a rubber-based molded article, an ink-jet ink receiving layer 120 containing a rubber-based resin and a screen ink printing layer 140 containing a rubber-based resin. The inkjet printing layer 130 is sandwiched between them. Thus, since the ink jet printing layer 130 is sandwiched between the layers containing the rubber-based resin, the effect of stabilizing the printed image is obtained.

Next, FIG. 4 shows a state of transfer onto the surface of the rubber-based molded product 200 of the ink-jet printing transfer sheet 100 for the rubber-based molded product.
As shown in FIG. 4A, pressing is performed from the screen ink printing layer 140 located on the rearmost surface to the surface of the rubber-based molded product 200. Since the screen ink printing layer 140 contains a rubber-based material and the surface of the rubber-based molded product is also rubber, it is sufficient that the rubber can be bonded. For example, as a physical method, there is a method such as heat transfer by applying heat while pressing the surface of the screen ink printed layer 140 and the rubber-based molded product 200. In recent years, although rubber is a difficult-to-bond material, an adhesive that bonds the rubber materials to each other has also been developed, so that the rubber materials are bonded between the screen ink printing layer 140 and the surface of the rubber-based molded product 200. An adhesive may be interposed.
Finally, as shown in FIG. 4B, the release sheet 110 located on the uppermost surface is peeled off. Since the release agent is applied, it can be removed relatively easily.

FIG. 5 is a diagram showing a state where the surface of the rubber-based molded product 200 onto which the ink jet printing transfer sheet 100 for the rubber-based molded product of the present invention is transferred is viewed from the surface.
After the release sheet 110 is peeled off, the ink-jet ink receiving layer 120 is positioned on the uppermost surface. However, as described above, the ink-jet ink receiving layer 120 is manufactured to have translucency. The lower inkjet printing layer 130 can be seen through the inkjet ink receiving layer 120. Since the inkjet print layer 130 appears as a positive image of the print image, the print image can be recognized.
In the above example, the molded product for transfer is described as a rubber-based molded product, but the same applies even if the molded product for transfer is a urethane-based molded product.

  As described above, if the inkjet printing transfer sheet 100 for a rubber-based molded product or a urethane-based molded product of the present invention is used, the surface of a rubber-based molded product or a urethane-based molded product, which has conventionally been considered difficult to print with ink. A high-definition image using an ink jet printer can be printed and transferred onto the surface of the film without using a member such as screen plate making.

Example 2 is characterized in that, in the ink jet printing transfer sheet, the color of the screen ink printing layer is a color having a high contrast ratio with the color of the ink jet ink, thereby improving the visibility of the ink jet ink.
An ink jet printing transfer sheet 100a for a rubber-based molded product or a urethane molded product according to Example 2 will be described.
Hereinafter, as an example, a rubber-based molded product is given as an example of a molded product for transfer, but a urethane-based molded product can be similarly applied as an example of a molded product for transfer.

FIG. 6 is a diagram simply showing the structure of an inkjet printing transfer sheet 100a for a rubber-based molded product or a urethane-based molded product according to Example 2 of the present invention.
As shown in FIG. 6, an ink jet printing transfer sheet 100a for a rubber-based molded product includes a release sheet 110, an ink jet ink receiving layer 120, an ink jet printing layer 130, and a screen ink printing layer 140a. .
Since the release sheet 110, the ink-jet ink receiving layer 120, and the ink-jet printing layer 130 are the same as those of the first type of the first embodiment, description thereof is omitted here.

  The ink used for the screen ink printing layer 140a is a screen ink containing a rubber-based resin having an affinity for rubber, as in Example 1. Since the screen ink itself is receptive to pigment ink, The compatibility is good. Moreover, since the rubber-type raw material is contained, the adhesiveness with the rubber-type molded product 200 is ensured.

Here, the background color of the screen ink of the screen ink printing layer 140a is devised. When the entire inkjet printing transfer sheet 100a is transferred to the rubber-based molded product 200, which is a molded product for transfer, the screen ink printing layer 140a is positioned at the bottom layer and positioned below the inkjet printing layer 130. It will be a thing. Therefore, the screen ink printing layer 140a can be a background color for printing of the inkjet printing layer 130. Here, if the printing of the inkjet printing layer 130 is a dark color system, it is possible to make the outline of the image stand out by adopting a color with a high contrast ratio as the color of the screen ink printing layer 140a, and the visibility of the inkjet ink is improved. It will be expensive.
The color of the screen ink printing layer is any one of white, silver, gray, yellow, cream, light color, or a combination thereof.

FIG. 7 is a diagram illustrating a state in which the inkjet print transfer sheet 100a according to the second example is transferred onto the surface of a rubber-based molded product 200 that is a molded product for transfer.
As shown in FIG. 7, the lower inkjet printing layer 130 can be seen through the light-transmitting inkjet ink receiving layer 120, but a screen ink printing layer 140 is further behind the inkjet printing layer 130. Here, if the printing of the inkjet printing layer 130 is a dark color and the color of the screen ink printing layer 140 is a color having a high contrast ratio, the printing of the inkjet printing layer 130 can be clearly seen, and the printed image Visibility is improved. FIG. 7 shows the outline of the printed image being emphasized.

Here, further ideas will be described.
This is a device for changing the background color of the background screen ink layer for each small area obtained by dividing the inkjet printing layer 130 into small areas.
Since the screen ink printing layer 140a is in the background of the inkjet printing layer 130 and has a function of improving contrast and emphasizes the outline of the image, by diversifying the color of the screen ink printing layer 140a, A ground color having a high contrast ratio according to the color of the image can be selected.

In the example of FIG. 8, it is assumed that each character is a print image in which different colors are given for easy understanding. Different colors are given in order from the left. And it prints so that the ground color of the screen ink printing layer 140a in the lower layer of each image may differ.
For example, from the left side, “shi” is green, “n” is blue, “pu” is red, and “b” is black. The color of the screen ink layer 140a in the lower layer is pale cream, pale pink, pale gray, and white from the left side, and the combination of the color of each image and the background color of the lower layer has a high contrast ratio. Then, it is possible to select a ground color having a high contrast ratio according to the color of the image.

As described above, if the ink jet printing transfer sheet for rubber-based molded products or urethane-based molded products of the present invention is used, the surface of rubber-based molded products and urethane-based molded products that have been conventionally difficult to print with ink is used. On the other hand, a high-definition image using an ink jet printer can be printed and transferred without using a member such as screen plate making.
Although the preferred embodiment in the configuration example of the inkjet printing transfer sheet for the rubber-based molded product or urethane-based molded product of the present invention has been illustrated and described, various modifications can be made without departing from the technical scope of the present invention. It will be understood that this is possible.

  The ink jet printing transfer sheet for rubber molded products of the present invention prints images on the surface of various rubber molded products such as tires, rubber mats, wet suits, rubber shoes, rubber gloves, rubber hoses, rubber belts, and urethane molded products. It can be applied to the purpose of doing.

DESCRIPTION OF SYMBOLS 100 Inkjet printing transfer sheet 110 Release sheet 120 Inkjet ink receiving layer 120
130 Inkjet printing layer 140 Screen ink printing layer 200 Rubber molded product

Claims (7)

A release sheet,
An ink-jet ink receiving layer formed by coating an upper surface of the release sheet with a resin material containing a rubber-based resin that is receptive to and light-transmitting ink-jet ink;
An inkjet printing layer obtained by performing inkjet printing of a mirror image of a printed image with inkjet ink on the upper surface of the inkjet ink receiving layer;
Provided on the upper surface of the inkjet printing layer is a screen ink printing layer that is screen-printed using a screen ink containing a rubber-based resin and pigment having affinity for rubber;
For transferring rubber-based molded products or urethane-based molded products, transfer from the surface of the screen ink printing layer to the transferred rubber-based molded product or transferred urethane-based molded product, and peel off and transfer the release sheet. Inkjet printing transfer sheet.   The inkjet printing layer is sandwiched between the ink-jet ink receiving layer containing the rubber-based resin and the screen ink printing layer containing the rubber-based resin. An ink jet printing transfer sheet for a rubber-based molded article according to claim 1.   The color of the screen ink printing layer is a color having a high contrast ratio with the color of the inkjet ink, and the inkjet ink has high visibility after transfer to the rubber-based molded product. Item 3. An inkjet printing transfer sheet for transferring a rubber-based molded product or urethane-based molded product according to item 1 or 2.   4. The rubber-based molded product according to claim 3, wherein the color of the screen ink printing layer is any one of white, silver, gray, yellow, cream, light color, or a combination thereof. Or an inkjet printing transfer sheet for urethane-based molded product transfer.   The rubber-based molding according to claim 3 or 4, wherein the screen printing of the screen ink printing layer is a single-color screen printing for the entire surface of the inkjet printing layer or for each small area obtained by dividing the inkjet printing layer into small areas. Inkjet printing transfer sheet for goods.   The resin of the ink-jet ink receiving layer includes a screen ink, a rubber-based material, and an additive, and the ink-jet ink receiving layer is a film coated with a thickness that can ensure translucency. An ink jet printing transfer sheet for a rubber-based molded article according to any one of claims 1 to 5. On the upper surface of the release sheet, an ink-jet ink receiving layer is formed by coating a rubber-based resin that is receptive and translucent to the ink-jet ink;
On the upper surface of the ink-jet ink receiving layer, an ink-jet printing layer obtained by performing ink-jet printing of a mirror image of a print image with ink-jet ink is provided.
On the upper surface of the inkjet printing layer, a screen ink printing layer is provided that is screen-printed using a screen ink that has an affinity for rubber;
Printing on a rubber-based molded product that does not require a screen plate that is transferred from the surface of the screen ink printing layer to the transferred rubber-based molded product or transferred-urethane-based molded product and peels off the release sheet. Method.

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