JPH1191222A - Printing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing material wherein when a transparent sheet is separated from the surface of a manuscript sheet having image line parts after the radiation of a light at the time of plate-making, a material (an ink or the like) which constitutes the image line parts can be prevented from adhering (being transferred) from the manuscript sheet to the transparent sheet. SOLUTION: For this printing material 10, on one surface of a porous sheet 11 wherein carbon black or the like is contained by being diffused, and which has continuous air bubbles, and can be impregnated with a stamp ink, a transparent sheet 12 of which the melting temperature is higher than the melting temperature of the porous sheet 11, is affixed, and in addition, on the surface of the transparent sheet 12 on the opposite side from the side which is affixed to the porous sheet 11, a coating layer 12C is provided. Therefore, when the printing material 10 is separated from a manuscript sheet 13 after the radiation of a light for a plate-making, the manuscript sheet 13 and the printing material 10 can be separated while the constituent material of an image part 13G does not adhere (is not transferred) to the coating layer 12C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stamp material for forming a stamp face of a stamp.

[0002]

2. Description of the Related Art There is known a technique for producing a stamp by using a photosensitive resin as a stamp material, performing imagewise exposure and development processing, and making a plate while leaving only a desired portion of the surface of the stamp material. Also,
There is also known a technique of making a stamp by making a plate of the surface of a stamp material by using a heat-sensitive resin as the stamp material.

[0003]

2. Description of the Related Art The present applicant has already proposed an invention related to the above technology (Japanese Patent Application No. 8-300173). In the invention, as shown in FIG. 7A, an unprinted plate material (stamp substrate) 72 in which carbon black is dispersed and contained in a porous resin material that can be impregnated with stamp ink.
Use 5. Note that a light energy absorbing substance can be used instead of carbon black.

[0004] Then, as shown in FIG.
A document sheet in which a light-impermeable image portion 721 is previously drawn on a surface of a light-transmissive paper such as a paper (tracing manuscript paper) with a light-impermeable ink such as black, an oil-based marker paint, a paint, or the like. 726 is placed on the surface of the transparent plate 717 such that the image area 721 faces upward, and then the surface of the original sheet 726 is melted at a temperature higher than the melting point of the unprinted stamp material 725. The unprinted stamp material 725 is overlaid and pressed via the transparent sheet 722 having the transparent sheet 722, and then, the area around the laminate is shielded from light, and as shown in FIG. (Not shown).

By doing so, the original sheet 726 is
Light energy that has passed through a portion other than the image portion 721 (that is, a non-image portion) passes through the transparent sheet 722 as it is,
The carbon black near the surface (light irradiation side surface) corresponding to the non-image area of the unplated printing material 725 is irradiated. Then, the carbon black absorbs light, and the surface portion of the unprinted stamp material 725 corresponding to the non-image area is heated and melted. After that, when the portion is solidified, the pores on the surface are closed, and an ink non-bleeding portion 723a having a predetermined thickness is formed.
(D)).

On the other hand, the image area 721 of the original sheet 726
Is heated by the light energy irradiated from the direction of the transparent plate 717, and the temperature rises. However, the heat generated on the original sheet 726 side is absorbed and dispersed by the transparent sheet 722, and the heat corresponding to the image area 721 is not reflected. The surface portion of the plate making and stamping material 725 is not heated, and the pores are exposed according to the shape of the image portion 721 to become the ink exuding portion 724.

Therefore, after the light irradiation, the transparent sheet 72
2 and the original sheet 726 are removed from the printing material 740,
As shown in FIG. 7D, as shown in the mirror image shape of the image area 721 of the original sheet 726, the ink exudation section 724 remains with the pores exposed, while the ink non-exudation section 723a corresponding to the non-image area remains. As it is, a plate-making stamp material 740 having a predetermined stamp surface can be formed.

[0008]

However, when the manuscript sheet 726 is separated from the transparent sheet 722 after the light irradiation, the material (ink, oil-based marker paint, paint, etc.) forming the image area 721 on the manuscript sheet 726 can be used. )But,
There is a case where the toner does not remain on the original sheet 726 but adheres (transfers) to the transparent sheet 722 side. This is the image area 721
Is caused by the fact that the material constituting is melted or damaged by light irradiation.

Such transfer is particularly remarkable in the following cases. In other words, a simple stamping mechanism that forms an imprint simply by pressing the unplated stamping material 725 on paper without the need for vermilion or a stamp base (that is, when pressed, the stamping surface is pressed against the cylindrical holder) A stamping mechanism that protrudes relatively downward) is attached as a stamping surface forming material, and the surface of the unprinted stamping material 725 is pressed downward to make contact with the transparent plate 717. However, in this case, since a corresponding force is required for the pressing, there is a particular problem.

[0010] The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for irradiating light during plate making.
When the transparent sheet is separated from the surface of the original sheet having the image portions, the material (ink or the like) constituting the image portions when the transparent sheet is separated
However, it is an object of the present invention to provide a printing material that can prevent adhesion (transfer) from a document sheet to a transparent sheet.

[0011]

According to a first aspect of the present invention, there is provided a stamp material which contains carbon black or a light energy absorbing substance dispersed therein and has open cells. On one surface of the porous sheet that can be impregnated with ink, a transparent sheet having a melting temperature higher than the melting temperature of the porous sheet is attached, and further, a transparent sheet opposite to the side attached to the porous sheet. A printing material provided with a coating layer on the surface thereof, and a light-transmitting original sheet having a desired image portion is pressed against the surface of the transparent sheet provided with the coating layer. By irradiating light from the sheet side, a portion corresponding to a portion other than the image portion on the surface of the porous sheet is melted and solidified to form an ink non-leakage portion, while the surface of the porous sheet is For the image area The ink layer can be formed as an ink bleeding portion while leaving the open cells at the place where the ink is to be formed, and the coating layer is made of a material (hereinafter, referred to as an “image object”) that constitutes the object portion rather than the raw material of the transparent sheet. (Also referred to as "component material").

In the above-described printing material, a coating layer made of a compound having a lower adhesion of an image portion constituting material than the raw material of the transparent sheet is provided on the transparent sheet surface on the side where the image portion contacts. . Therefore, when the transparent sheet is separated from the surface of the original sheet having the image portion forming material, the image layer forming material is unlikely to adhere (transfer) to the transparent sheet side due to the presence of the coat layer. In short, the coat layer functions as a transfer prevention layer.

[0013] In the stamp material according to claim 2, the compound is:
At least at the melting temperature of the porous sheet, it is a compound having lower adhesion of the image portion constituting material than the raw material of the transparent sheet. The adhesion (transfer) is actually
This occurs when the image forming material is easily attached to the transparent sheet from the original sheet at the plate making execution temperature (that is, the melting temperature of the porous sheet). Therefore, at least at the melting temperature of the porous sheet, the adhesion of the image forming material to the compound (that is, the coating layer) is lower than the adhesion of the image forming material to the transparent sheet raw material. For example, the presence of the coating layer prevents or reduces the adhesion of the image portion constituting material to the transparent sheet side.

According to a third aspect of the present invention, in the stamp material, the compound is
It is a silicone resin or a fluorine resin. These resins have low adhesion to most substances and thus prevent the transfer of virtually all image-forming materials used in the art.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic diagram showing a state where plate making is performed using a stamp material 10 according to the present invention. In the stamp material 10, the melting temperature of the porous sheet 11 is provided on one surface of the porous sheet 11, which contains carbon black or a light energy absorbing substance in a dispersed state and has continuous cells and can be impregnated with stamp ink. The transparent sheet 12 having a higher melting temperature is bonded, and further, the transparent sheet 1 opposite to the side bonded to the porous sheet 11
The coat layer 12C is provided on the two surfaces.

The printing material 10 having such a configuration is brought into contact with a document sheet 13, that is, a transparent plate 14 such as an acrylic resin.
An original sheet 13 having an image portion 13G on the opposite side to the contact surface thereof is placed on the coat layer 12C and the image portion 13G.
G is pressed while making contact with the surface having G, and in that state, light such as xenon light is irradiated through the transparent plate 14,
Plate making is performed.

The main material of the porous sheet 11 is a foamed resin material such as a polyolefin resin, a polyvinyl chloride resin, a polyurethane resin, or a rubber material. It is preferable to have the property (softness). The thickness of the porous sheet 11 is usually 1 m.
m to 5 mm. The light energy absorbing substance used in place of carbon black includes silver chloride, silver bromide and the like.

The weight ratio of carbon black or a light energy absorbing substance contained in the porous sheet 11 is, for example, in the case of a polyurethane foamed resin, the content of carbon black or the like is usually 0.1 to 1 with respect to the resin. weight%
To 15% by weight, preferably 1.0% to 15% by weight
It is.

The transparent sheet 12 has the property of melting at a temperature higher than the melting point of the porous sheet 11 (about 120 ° C. for a soft polyurethane resin and about 70 ° C. for a soft polyolefin resin). In particular, a transparent PET (polyethylene terephthalate) resin film having a high melting point (about 230 ° C.) is preferable.
The thickness of 2 is usually about 0.025 mm to 0.2 mm. In the present embodiment, the image portion constituting material is ink transferred from the ink ribbon to the document sheet 13 by the thermal head.

In the coat layer 12C, the adhesion of the image forming material (that is, the ink) to the coat layer 12C is lower (preferably as low as possible) than the adhesion of the image forming material to the raw material of the transparent sheet 12. It consists of a compound having properties. However, it is sufficient that such conditions are satisfied at least at the melting temperature of the porous sheet 11.

Preferred examples of the compound are any kind of silicone resin or fluorine resin. These are easily available as commercial products. An example thereof is Fujikopian trade name E15. The coat layer 12C is
Generally, it can be formed by coating with a gravure coater or a bar coater. The thickness of the coat layer 12C is usually about 0.1 g / m ² .

In the printing material of the present embodiment, a printing surface is formed by irradiation of light such as xenon light, and the mechanism is the same as that of the prior art. That is, a portion of the document sheet 13 other than the image area 13G (that is, the non-image area 13G).
The light energy that has passed through N) is absorbed by carbon black or the like near the surface of the printing material 10 corresponding to the non-image portion 13N, and as a result, the surface portion of the printing material 10 corresponding to the non-image portion 13N is heated. After melting, the part is solidified and the pores on the surface are closed, and finally become a non-bleeding part of the ink. On the other hand, the image portion 13G of the original sheet 13 is
Heated by the light energy irradiated from four directions, the temperature rises, but the heat generated on the original sheet 13 side is absorbed and dispersed by the transparent sheet 12, and the surface portion of the unprinted stamp material 10 corresponding to the image area 13G Are not heated, the pores remain, and become ink bleeding portions. Thus, a stamp surface is formed.

The stamp material 10 of the present embodiment has the above-mentioned predetermined coat layer (that is, a coat layer to which the image forming material is difficult to adhere) 12 C on the surface of the transparent sheet 12. Therefore, when the printing material 10 is separated from the original sheet 13 after light irradiation for plate making, as shown in FIG. 2A, the image forming material of the image forming portion 13G adheres (transfers) to the coat layer 12C. Don't
Alternatively, such adhesion is suppressed, and the document sheet 13 and the stamp material 10 can be separated. In short, FIG. 2 (B)
, That is, the state in which the image forming section material adheres (transfers) to the stamp material 10. In particular, if the coat layer 12C is made of a silicone resin or a fluororesin, the above-mentioned adhesion (transfer) does not substantially occur. As a result, the original sheet 13 is prevented from being damaged in the image portion 13G, and can be used any number of times during plate making. In addition, since the coat layer 12C is previously adhered to the surface for forming the stamped surface of the stamping material 10, it also functions as a protective film for the stamped surface formed surface.

In the above-described embodiment, the image portion constituting material is ink using an ink ribbon. However, if the adhesion to the stamp material 10 of any of the used image portion constituent materials, such as other ink, oil-based marker paint, and paint, is reduced by providing the coat layer 12C, at least The coat layer 12C is effective for the image portion constituting material, and exhibits the effects of the present invention. Therefore, the printing material 10 provided with such a coat layer 12C is included in the present invention.

When the unprinted stamp material 10 of the present embodiment is pressed onto a sheet without using a simple stamping mechanism (that is, a vermilion or a stamp stand is required), the stamp surface protrudes downward relative to the cylindrical holder. The stamping mechanism that comes in is attached as a stamping surface component, and the plate making is performed by irradiating light through the transparent plate 14 in a state where the unprinted stamping material 10 is pressed against the transparent plate 14. Due to the coat layer 12C, the image portion forming material is unlikely to adhere to the stamp material 10. An example of such a simple stamp mechanism will be described below.

As shown in the exploded view of FIG. 3, a holder 20 having a cylindrical portion 21 having an ink intake port and an ink storage portion 22 corresponding to the shape of the stamping material 10 for storing ink near the stamping material 10. To form the bottom surface,
Is attached. The stamping material 10 is made of P on a porous sheet.
A transparent sheet made of ET is provided, and further, a coat layer is provided on the surface thereof, that is, on the outermost side (FIG. 3 does not show the porous sheet, the transparent sheet, and the coat layer separately. ). The coat layer is a silicone resin film. The bonding and fixing of the stamp material 10 to the holder 20 is the stamp material 1
0 by heat welding or the like.

When the stamp material 10 is arranged and fixed to the holder 20 as described above, the ink storage portion 22 of the holder 20
A hole through which the ink is circulated, the through-hole for ink transmission 31 for diffusing the ink from the outlet to the surrounding printing material 10
Spacers 30 provided with a large number (generally, the diameter is about 1 to 5 mm) are arranged. In addition, a protrusion 32 is provided on the surface of the spacer 30 opposite to the side of the printing material 10. When the spacer 30 is disposed in the ink storage section 22, the protrusion 32 is on the side opposite to the surface on which the protrusion 32 is formed. Is pressed against the stamping material 10.

As shown in the exploded view of FIG. 4, the vertical sectional view of FIG. 5, and the front view of FIG.
The skirt member 50 (specifically, a portion 51 covering the ink storage portion 22 and an inner cylindrical portion 5 fitted around the cylindrical portion 21)
2, and a skirt member 50) having an outer tubular portion 53 surrounding the inner tubular portion 52) are fitted outside.

A coil spring 60 is inserted into a space between the inner cylindrical portion 52 and the outer cylindrical portion 53 of the skirt member 50. For example, as shown in FIG.
The first cylindrical portion 21 has a first stepped portion 21a formed at a position corresponding to the upper end of the outer cylindrical portion 53, and the spring retainer 65 is fitted to the first stepped portion 21a. Fixed. A cap 70 is fitted into the upper end of the cylindrical portion 21 of the holder 20 into which the ink is poured.

Further, a handle 80 for covering the upper part of the assembly is provided. As shown in FIG. 5, the handle 80 has an outer covering portion 81 and an inner fixing portion 82, and the tip of the inner fixing portion 82 is the holder 2.
The first cylindrical portion 21 is fixed to the cylindrical portion 21 by being fitted to the second step portion 21b formed on the cylindrical portion 21. When not in use, the stamp having such a configuration is covered with the lid 90 and stored (see FIG. 4).

When the handle 80 of the simple stamp is pushed down, the holder 20 fixed thereto is also pushed down against the urging force of the coil spring 60. Therefore, stamp material 1
The surface of the coat layer 12C at 0 is pressed against the one on which the stamp is placed (the original sheet 13 placed on the transparent plate 14 at the time of plate making, and the paper at the time of stamping). When the pressing force on the handle 80 is released, the holder 20 and the handle 80 return to their original positions by the urging force of the coil spring 60 (the state shown in FIG. 5).

The stamp material 10 attached to such a simple stamp mechanism is pressed with an appropriate force against the transparent plate 14 shown in FIG. 1 at the time of irradiating light for plate making, but regardless of the pressing force. The coating material 12C is applied to the stamp material 10.
Therefore, the material for the image portion is difficult to adhere. Therefore, when the printing material 10 is separated from the document sheet 13, it is difficult for the image forming part forming material to be transferred to the printing material 10.

[0033]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described. PE with a thickness of 0.075 mm for a polyurethane porous resin having a thickness of 1 mm, a length of 35 mm, a width of 35 mm, a melting point of 110 ° C., an average pore diameter of 20 μm, and a sponge hardness of 30 degrees.
A T film was attached as a transparent sheet. Two of these are prepared and a silicone resin (trade name: E15, manufactured by Fujikopian Co., Ltd.) is applied to one of the PET film surfaces.
Was provided. Specifically, a coat layer was formed by applying a gravure coater or a bar coater so as to have a uniform thickness on the surface of the PET film.

Using these two stamps, a stamp with a blank stamping stamp having the same configuration as that shown in FIGS. 3 to 6 was manufactured. Thereafter, each stamp is pressed against the original sheet 13 on the transparent plate 14 shown in FIG. 1 under the same conditions. In this state, light is blocked from the surroundings, and a capacitor of 9000 μF, a voltage of 330 V is applied from the original sheet side. Was irradiated with xenon lamp light. The image portion of the document was formed by pressing an ink ribbon using a thermal head.

Thereafter, the pressing force was released, and the printing material was released from the original sheet. The printing material according to the present invention having a coat layer is an image portion forming material (ink) 13G of the document sheet 13.
Can be separated from the printing material 10 without adhering to the transparent sheet 12, and the image area 13G is not damaged. On the other hand, in the printing material having no coat layer, the image portion constituting material (ink) 13G adhered to the transparent sheet 12. As a result, the image area 13G was damaged and could not be used again.

[0036]

As described above in detail, in the printing material according to the first aspect of the present invention, when the transparent sheet is separated from the surface of the original sheet having the image forming material, the coating layer is present. It is difficult for the image portion constituting material to adhere (transfer) to the transparent sheet side. According to the second aspect of the present invention, at least the image material constituting material is prevented or reduced from adhering to the transparent sheet side. According to the third aspect of the present invention, it is possible to sufficiently prevent the transfer of almost all image forming material used in the art.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a state where plate making is performed using a stamp material according to the present invention.

FIG. 2A is a schematic diagram showing a state in which a printing material provided with a coating layer according to the present invention is separated from a document sheet, and FIG.
FIG. 3 is a schematic diagram showing a state where a printing material having no coat layer is separated from a document sheet.

FIG. 3 is an exploded perspective view of a stamp holder provided with the stamp.

FIG. 4 is an exploded perspective view of a stamp provided with the holder.

FIG. 5 is a vertical sectional view of the stamp.

FIG. 6 is a front view of the stamp.

FIG. 7 is a schematic view showing a prior art.

[Explanation of symbols]

Reference Signs List 10 stamping material, 11 porous sheet, 12 transparent sheet, 12C coating layer, 13 original sheet, 13G image area, 13N non-image area, 14 transparent plate, 20 holder,
30 spacer, 50 skirt member, 60 coil spring, 70 cap, 80 handle.

Claims (3)

[Claims] 1. A surface of a porous sheet which contains carbon black or a light energy absorbing substance dispersed therein and has open cells and can be impregnated with stamp ink, and has a temperature higher than the melting temperature of the porous sheet. A stamping material having a coating layer provided on a surface of the transparent sheet opposite to the side bonded to the porous sheet, wherein a transparent sheet having a melting temperature is bonded, and the transparent material provided with the coating layer is provided. A light-transmissive original sheet having a desired image portion is pressed against the surface of the sheet, and in this state, light is irradiated from the original sheet side, so that the surface of the porous sheet other than the image portion is exposed. The portion corresponding to the portion is melted and solidified to form an ink non-exuding portion, while the ink exuding portion is formed by leaving an open cell corresponding to the image portion on the surface of the porous sheet as an ink exuding portion. The shape Are possible, the coating layer than the raw material of the transparent sheet, adhesion of the material of the imaging portion comprising a low compounds stamp material. 2. The compound according to claim 1, wherein at least a melting temperature of the porous sheet is greater than a raw material of the transparent sheet.
2. The printing material according to claim 1, wherein the material forming the image portion is a compound having low adhesion. 3. The printing material according to claim 1, wherein the compound is a silicone resin or a fluororesin.