JP6391444B2 - Manufacturing method of image transfer sheet - Google Patents

Description

  The present invention relates to a method for producing an image transfer sheet that can easily and easily transfer and print a high-precision color image using an electrostatic dry laser printer or a UV ink type ink jet printer.

  Conventionally, an image transfer sheet capable of transferring and printing a color image is known (for example, Patent Document 1). Conventionally, to make this type of image transfer sheet, an image is formed on transfer paper, a silhouette plate having the same pattern as the image is formed, and an adhesive is applied and laminated on the image using a screen printer. It has been. However, since it is very difficult to print with the adhesive exactly aligned to the top of the image, the adhesive often protrudes from the image, and as a result, when transferred, the protruding adhesive There is a problem that the image is sticky or the adhesive is not placed on the opposite part of the image, so that transfer cannot be performed partially. To solve the problem, make a plate with a slightly larger silhouette than the image, and layer the image with a transparent ink so that the adhesive may protrude from the image area. A method is generally adopted in which the plate is made slightly smaller than the image and is prevented from overflowing.

JP 2010-128061 A

  However, the conventional method has the disadvantages that many kinds of plates are required, the process becomes long, and the cost of materials becomes high. Moreover, it required skilled workers and high-precision and expensive printing equipment.

  The conventional method for solving the above-mentioned drawbacks can transfer a die-cut image using a laser printer used in a normal office and an inexpensive material without using a special means of screen printing. It is to be able to obtain a transfer sheet. In addition, in order for non-professionals to handle it by ordinary people, the ease of work and the safety of the materials used must be high.

  In order to achieve the above object, in the method for producing an image transfer sheet of the present invention, a transfer paper prepared by laminating a water-soluble paste on the surface of a sheet-like paper base material is prepared, and the water-solubility in the transfer paper is prepared. After forming an image of a water-insoluble resin on the surface of the paste with a toner of a laser printer, etc., after applying an adhesive on the surface of the image surface and drying it, the adhesive surface of the transfer paper was impregnated with moisture By wiping with an applicator such as tissue paper, the water-soluble glue in the lower layer where the adhesive other than the image is laminated is melted and removed by the moisture that has passed through the adhesive layer. The image transfer sheet is removed, and the image transfer sheet is manufactured by leaving the adhesive only in the image portion.

  The transfer paper used in the present invention is obtained by applying dextrin, carboxymethyl cellulose (CMC), polyvinyl alcohol (PVA) or the like as a water-soluble paste to a paper substrate having high water absorption.

  As a means for forming a water-insoluble resin image, a laser printer using an electrostatic dry toner, a color copier, and an ink jet printer using a UV curable ink can be used. Further, it can be formed by printing using oil-based ink for screen printing. That is, as long as the ink is not melted by water, the printing means is not particularly fixed, and any ink that has a masking effect when wiping with water can be used.

  As a requirement required for the adhesive, it is necessary to have a function of allowing water to pass through without melting in water. Examples of this include an aqueous emulsion type adhesive or pressure-sensitive adhesive. These adhesives have water resistance when dried and become insoluble in water. However, due to their hydrophilicity, moisture passes through and reaches the underlying water-soluble paste. The upper adhesive layer collapses at an accelerated rate by the water-soluble glue once melted, and the adhesive is removed from the transfer paper together with the water-soluble glue. Since the image portion is insoluble in water, the adhesive applied on the image is left behind.

  When using an adhesive that does not allow water to pass through, the surface of the adhesive is rubbed with a melamine sponge or fine sandpaper to open fine holes in the adhesive layer and allow water to pass. Is possible. Note that the surface change due to this rubbing has no influence on the final image transfer performance.

  The completed image transfer sheet can be used by overlaying and bonding the image surface of the transfer sheet to the object to be transferred, and then applying water to the back surface of the transfer sheet to melt the water-soluble glue and peeling off the image. Is completed. The mode of adhesion varies depending on the type of adhesive used, but when a heat-sensitive adhesive is used, the image can be adhered by heating and pressing with an iron, a heat roller or the like. When an adhesive is used, the image can be adhered simply by applying pressure using a finger or a spatula.

  In addition, a function can be provided by mixing an additive into the adhesive. By adding a white pigment, it is possible to transfer a white-colored color image that does not show through the base. Further, if silica fine powder or the like is added, water permeation is facilitated, and the water-soluble paste can be melted more quickly, thereby speeding up the operation. In addition, when a white transfer foil is superimposed on a toner image formed by a color laser printer and heat-pressed, a white foil is laminated on the top of the toner. After applying an adhesive on the toner foil, the transfer sheet is wiped with water. If created, a white image with high whiteness can be produced. Further, if this method is used, it is possible to reinforce the masking effect with a white foil even on an image with a low toner concentration, and it is possible to produce a transfer sheet for a light color image. Further, if silver foil is used instead of white foil, the transferred image has a metallic effect. For example, if a silver foil is superimposed on a yellow character and transferred, the character is printed as a gold character, and the effect of stamping is obtained.

According to the method for producing an image transfer sheet of the present invention, there is an effect that a transfer sheet for transferring an image in a die-cut state can be easily produced without special equipment or technology. The actual selling price of color laser printers is currently less than 10,000 yen, and the material used is only a few hundred yen. Also, the only materials used are water-soluble paper, water-based adhesive, and water, which are extremely effective for health and fire safety. Also, the work content is simple, just applying an adhesive and wiping with water, and has the effect of being so simple that even a child can make it. When a pressure-sensitive adhesive is used as the adhesive, the completed image transfer sheet is pressed onto the object to be transferred and pressed to apply the water from the back to complete the transfer. There is an effect that can be printed. In addition, if white foil is used for production, there is an effect that it is possible to print in a vivid color with no show-through on dark materials and transparent materials. In addition, when manufactured using silver foil, there is an effect that it is possible to carry out foil stamp printing of gold letters and the like without using an expensive mold or machine.

It is the vertical side view which showed the manufacturing method of the image transfer sheet which concerns on embodiment of this invention.

  Hereinafter, a method for producing an image transfer sheet according to an embodiment of the present invention will be described in detail with reference to the drawings as appropriate.

  The transfer paper (A) in FIG. 1 (a) is formed by applying and laminating a water-soluble paste (2) on the surface of a sheet-like paper substrate (1). On the transfer paper (A), an image (3) made of a water-insoluble resin is formed on the surface of the water-soluble paste (2).

  An adhesive (4) is applied and dried on the surface of the image (3) and the transfer paper (A) made of the water-soluble resin as shown in FIG. Thereafter, as shown in FIG. 1C, the surface of the image surface coated with the adhesive (4) is wiped with various applicators (5) impregnated with moisture (6). Thereafter, as shown in FIG. 1 (d), the water-soluble glue (2) in the layered portion of the adhesive other than the image (3) formed by the water-insoluble resin is melted and removed to adhere only to the image portion. An image of the water-insoluble resin on which the agent is laminated is left.

Experimental example

  The transfer paper uses water transfer paper for ceramics in which water-soluble paste dextrin is applied to the surface of water-absorbent paper, and NEC's laser printer (MultiWriter5100) is used on the surface of the paper to make color letters and illustrations. Then, an aqueous emulsion type pressure-sensitive adhesive (tack binder) manufactured by Piqua was included in a sponge and dried. Then, when the tissue paper as an applicator was soaked with water and the entire image surface was wiped off, the adhesive other than the image was removed, and the image on which the adhesive was laminated was left on the paper.

  In addition, when a similar method was performed using a water-based emulsion-type heat-sensitive adhesive (power binder) manufactured by Piqua, a transfer sheet was obtained with the heat-sensitive adhesive layered on the image area. It was.

  Using this transfer sheet, a transfer operation was performed using drawing paper as a material to be transferred. In the case of using the adhesive, after the image surface was pressure-bonded to the drawing paper, water was applied from the back surface of the transfer sheet, and the sheet was peeled off after about 20 seconds, whereby the image was transferred onto the drawing paper.

  When using a heat-sensitive adhesive, overlay the image surface on the drawing paper, set the iron to a medium temperature from the top of the sheet, thermocompression bond, apply water from the back of the transfer sheet, and peel off the sheet after about 20 seconds. The image was transferred onto drawing paper.

  In addition, when silica (Imperial ink lump agent) (weight ratio 1%) is mixed in the adhesive emulsion, coated, dried, and then wiped over the entire image surface with water in tissue paper, it does not mix. The adhesive coating could be removed more than twice as fast.

  Also, after rubbing the dry adhesive film surface with melamine sponge and wiping the entire image surface with water in tissue paper, the adhesive will be more than twice as fast as when it is not scratched. The coating film could be removed.

Moreover, as a result of performing the same operation using an inkjet printer using UV ink (UJF3042 manufactured by Mimaki Engineering Co., Ltd.) instead of the color laser printer, the same result as that of the color laser printer was obtained.

  In addition, after printing color characters on a transfer paper using a color laser printer, when the Pikua transfer foil <white> is superimposed on the image surface and passed through a laminator, the toner part exhibits adhesiveness due to heat, and the characters White foil adheres only to the part. The transfer sheet thus prepared was coated with an adhesive and dried in the same manner, and the entire image surface was wiped with tissue paper soaked with water. A transfer sheet with a white backing only on the character portion was completed. When this character was transferred onto the dark transfer material surface, a vividly colored character that did not show through the color of the material was transferred. Further, instead of the white foil, a transfer foil <silver> manufactured by Pikua Co., Ltd. was overlapped on the image surface and the same operation as the white foil was performed. As a result, a transferred image having a metallic gloss was obtained.

DESCRIPTION OF SYMBOLS 1 Paper base material 2 Water-soluble glue 3 Image 4 Adhesive 5 Applicator 6 Moisture A Transfer paper

Claims (2)

  It has a transfer paper (A) formed by laminating a water-soluble paste (2) on the surface of a sheet-like paper base (1), and the transfer paper (A) includes the water-soluble paste (2). After forming the image (3) of the water-insoluble resin on the surface of the sheet, the adhesive (4) is applied to the surface of the image (3) surface of the water-insoluble resin and dried, and then the transfer paper (A) The adhesive surface is wiped with an applicator (5) impregnated with moisture (6), and the water-soluble glue (2) other than the image (3) by the water-insoluble resin is melted and removed, so that only the image portion is obtained. A method for producing an image transfer sheet, wherein an adhesive is left behind.   2. The method for producing an image transfer sheet according to claim 1, wherein the image of the water-insoluble resin is formed by a toner of a laser printer.

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