JPH1178196A - Stamp material - Google Patents

Abstract

(57) [Problem] To provide a printing material in which the printing surface of the printing material does not swell, regardless of what kind of ink is used for the printing material. SOLUTION: A portion irradiated with light has a porosity capable of penetrating and exuding of ink, and a portion irradiated with light is blocked by heat generated by energy conversion to become an ink non-exuding portion, and the other portion becomes an ink exuding portion. This is a stamping material 10 including a plate-shaped porous resin 11 capable of forming a stamping surface. A hard porous body 1 harder than the porous resin 11 is provided on a surface S2 on the back side of the stamp surface S1.
2 are bonded. The compressive strength of the hard porous body 12 is 25%
At the time of deformation, it is 5 kgf / cm ² or more. Hard porous body 12
And the plate-shaped porous resin 11 are point-bonded at many points.

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). According to the invention, as shown in FIG. 6A, an unprinted plate material (stamp substrate) 62 in which carbon black is dispersed and contained in a porous resin material that can be impregnated with stamp ink.
Use 5. In addition, a light energy-sucking substance can be used instead of carbon black.

[0004] Then, as shown in FIG.
An original sheet in which a light-impermeable image portion 621 is previously drawn on a surface of a light-transmissive paper such as a paper (tracing original paper) with a light-impermeable ink such as black, an oil-based marker paint, a paint, or the like. 626 is placed on the surface of the transparent plate 617 so that the image portion 621 faces upward, and then the surface of the original sheet 626 is melted at a temperature higher than the melting point of the unprinted stamp material 625. An unprinted stamp material 625 is overlaid and pressed via the transparent sheet 622 having the transparent sheet 622, and then the area around the laminate is shielded from light, and as shown in FIG. Flash.

By doing so, the original sheet 626 is
Light energy that has passed through a portion other than the image portion 621 (that is, a non-image portion) passes through the transparent sheet 622 as it is,
The carbon black near the surface (light irradiation side surface) corresponding to the non-image area of the unplated printing material 625 is irradiated. Then, the carbon black absorbs light, and the surface portion of the unplated printing material 625 corresponding to the non-image portion is heated and melted. After that, when the portion is solidified, the pores on the surface are closed, and an ink non-exuding portion 623a having a predetermined thickness is formed.
(D)).

On the other hand, the image area 621 of the original sheet 626
Is heated by the light energy irradiated from the direction of the transparent plate 617 and rises in temperature. However, the heat generated on the original sheet 626 side is absorbed and dispersed by the transparent sheet 622, and The surface portion of the plate making and stamping material 625 is not heated, and the pores are exposed according to the shape of the image portion 621 to become the ink exuding portion 624.

Therefore, after the light irradiation, the transparent sheet 62
When the sheet 2 and the original sheet 626 are removed from the unprinted stamp material 625, as shown in FIG. 6D, as shown in the mirror image shape of the image portion 621 in the original sheet 626, the ink exudation section 624 remains with the pores exposed, The non-ink bleeding portion 623a corresponding to the non-image portion remains on the pre-printed stamp material 640 having a predetermined stamp surface.

[0008]

A simple stamping mechanism in which such a plate-making stamped material 640 does not require a vermilion or a stamp stand, and is formed simply by pressing it on paper, that is, when pressed, It is conceivable to attach and use the stamp mechanism, in which the stamp face projects relatively downward with respect to the cylindrical holder, as a stamp face constituent material.

The unprinted stamp material 625 is attached to the stamp mechanism as described above, and the unprinted stamp material 625 is attached to the transparent plate 6.
It is also conceivable that plate making is performed as described above with the plate pressed against the plate 17. If the unplated printing material 625 is not pressed, the printing surface of the unprinted printing material 625 and the document sheet 626 are separated, and a desired printed image is not actually formed on the printing surface.

[0010] In any of the above cases, the unprinted stamp material 625 is used.
Alternatively, for example, a 5 mm-thick spacer (that is, the ink passes through the plate-making stamping material 640 in order to make the ink contact with the plate-making stamping material 640 at a certain rate in order to allow the ink to pass through the stamping material 640 on the side opposite to the stamping surface of the stamping material 640) In order to diffuse the ink into the printing material 640, a spacer having a large number of through holes for ink passage having a diameter of about 2 mm is usually arranged.

However, when ink is put into the simple stamp mechanism after plate making, depending on the type of ink,
In some cases, the stamped surface of the plate-making stamped material 640 subjected to ink penetration may swell. In this case, the function as a stamp is significantly reduced, and a high-quality imprint cannot be obtained.

An unprinted stamp material 625 is attached to the simple stamp mechanism as described above, and the stamp material is attached to the transparent plate 6.
When plate making is performed in a state where the plate is pressed against 17, the pressure is applied to the stacked original sheet 626 and the transparent film 622, but the pressure is not sufficiently applied to the printing material portion corresponding to the ink passage hole of the spacer. In that part, manuscript sheet 6
26, the transparent film 622 and the stamp material 625 do not come in close contact,
As a result, the line drawing of the prepressed stamp face may become unclear.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a first object of the present invention is to provide a printing material in which the printing surface of the printing material does not swell regardless of the type of ink used. It is in. A second object of the present invention is to make a plate,
An object of the present invention is to provide a printing material in which a line drawing of a printing surface of a printing material that has been made plate does not become unclear even when a holder provided with a spacer having an ink passage hole is used.

[0014]

According to the first aspect of the present invention, which is capable of achieving the first object, the printing material has a porosity that allows ink to penetrate and bleed, and the light-irradiated portion has energy conversion. A seal material that is closed by the heat generated by the heat and becomes an ink non-exuding portion, and the other portion becomes an ink exuding portion and includes a plate-shaped porous resin capable of forming a stamp surface, and a surface on the back side of the stamp surface, A hard porous body that is harder than the porous resin is adhered, and the compressive strength of the hard porous body is 5 kgf / cm ² or more when deformed by 25%. In this case, point bonding is performed.

In the above stamp material, since the rigid porous body has a compressive strength of 5 kgf / cm ² or more, it can function to prevent swelling of the porous resin when adhered to the flat porous resin. it can. However, if the rigid porous body is completely adhered to the flat porous resin, the ink cannot be sent from the hard porous body to the flat porous resin,
On the other hand, if the bonding portions are too sparse, swelling of the plate-shaped porous resin cannot be prevented even with the strength of the hard porous body. Therefore, the rigid porous body and the plate-like porous resin were bonded in a point-like manner at many points.

According to a second aspect of the present invention, in which the second object is achieved, a plurality of through holes for ink permeation are provided on the back surface of the hard porous body to which the flat porous resin is adhered. Are arranged. When the printing material on which the spacers are arranged is pressed through the spacers on the above-mentioned laminate made of a manuscript sheet or the like at the time of plate making, since the hard porous body exists, the ink-permeable through holes of the spacers are present. A sufficient pressing force is applied to the lower flat porous resin portion. Therefore, the line drawing of the plate-making stamp face becomes clear also in that portion.

According to a third aspect of the present invention, the hard porous body is made of a porous resin. When the hard porous body is also made of resin in this way, it can be easily welded to the holder on which the stamping material is set, and the manufacture of the simple stamp is facilitated.

According to a fourth aspect of the present invention, the flat porous resin has a melting point of 50 to 200 ° C. and a sponge hardness of 2 ° C.
0 to 50 degrees, the average pore diameter is 0.01 to 0.05 m
m. When the plate-shaped porous resin has such physical properties, a very high-quality imprint can be formed when the manufactured mark is stamped.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an exploded perspective view showing one embodiment of a stamp material 10 according to the present invention. This stamping material 10 is made of a plate-like porous resin 11 whose surface S1 facing up in the figure is made into a stamping surface, and a plate-like porous resin 11 adhered to a surface S2 opposite to the stamping surface S1. And a hard porous resin 12 (an example of a hard porous body according to the present invention) harder than 11.

The hard porous resin (hereinafter, also referred to as “hard resin”) 12 has a predetermined strength, and essentially comprises a flat porous resin (hereinafter, also referred to as “soft resin”) 11
It is provided for the purpose of preventing swelling or the like by ink. Ink is supplied from a surface of the hard resin 12 opposite to the soft resin 11.

The state of adhesion between the soft resin 11 and the hard resin 12 is one of the features of the present invention, and point-like contact is made at many points. In the example shown in the drawing, they are adhered in a halftone dot shape with an adhesive. Thus, the hard resin 12 is replaced with the soft resin 11.
Since the entire surface is not bonded with an adhesive, the ink can be sent from the hard resin 12 to the soft resin 11. In addition, since the bonding portion is not made too thin, the swelling of the soft resin 11 by the ink can be prevented with the strength of the hard resin 12. From the above viewpoint, it is preferable that the bonding portion has a pitch of 1 to 10 mm. The type of the adhesive may be appropriately selected in consideration of the affinity for both the soft resin 11 and the hard resin 12.

In this embodiment, in addition to the above-mentioned bonding method,
Although the physical properties of the hard resin 12 and the soft resin 11 are characteristic, before describing the physical properties in detail, a preferred form of the simple stamp in which the stamp material 10 is incorporated is shown in FIGS.
With reference to FIG.

As shown in the exploded view of FIG. 2, a holder 20 having a cylindrical portion 21 having an ink intake port and an ink storing portion 22 corresponding to the shape of the stamping material 10 for storing ink near the stamping material 10. The stamp 10 is placed on the holder 20 with the soft resin 11 facing outward so as to form a bottom surface. Since all the constituent materials of the stamp material 10 are formed of resin, the joining and fixing of the stamp material 10 to the holder 20 are performed by the stamp material 1.
It can be easily implemented by heat welding of 0 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. 3, the vertical sectional view of FIG. 4, and the front view of FIG. 5, on the side of the stamping surface of the stamping material, a thickness of 50 to 50 corresponding to the transparent sheet 622 shown in FIG. 100
A μm PET film 40 is attached. This PE
The T film 40 is formed into a predetermined shape by die-cutting, and the surface thereof is subjected to a silicone resin coating treatment so that the image of the document sheet is not welded. The tubular portion 21 of the holder 20 includes a skirt member 50 (specifically, a portion 51 that covers the ink storage portion 22, an inner tubular portion 52 that fits around the tubular portion 21, and an inner tubular portion 52 thereof). And a skirt member 50) having an outer tubular portion 53 surrounding the skirt member.

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. It is fixed (see FIG. 4). Ink is poured in,
A cap 70 is fitted into the upper end of the cylindrical portion 21 of the holder 20.

Further, a handle 80 for covering the upper part of the assembly is provided. Its handle 80
Has an outer covering portion 81 and an inner fixing portion 82,
The distal end of the inner fixed portion 82 is fitted into the second step portion 21 b formed on the cylindrical portion 21 of the holder 20, thereby forming the cylindrical portion 2.
1 (see FIG. 4). When not in use, the stamp having such a configuration is covered with the lid 90 and stored (see FIG. 3).

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 S1 of the soft resin 11 at 0 is pressed against the one on which the stamp is placed (the laminate including the original sheet at the time of plate making, and the paper at the time of stamping). Handle 80
When the pressing force is released, the holder 20 and the handle 80 return to their original positions by the urging force of the coil spring 60.

Next, the material and physical properties of the constituent materials of the stamp material in the stamp having the above-described configuration will be described. Stamp material 10
Soft resin 11 is porous (that is, leaches ink)
Any resin can be used as long as it is a resin that functions as a stamp surface, for example, is a porous material having open cells, can melt only a desired portion at the time of plate making and does not exude ink, and has elasticity (softness). . However, a polyurethane resin is preferable as the material.

Further, the melting point of the soft resin 11 is preferably 200 ° C. in order to be melted by the heat caused by the light received during plate making.
On the other hand, in order to obtain a reproducible and high-quality stamped surface by melting with heat, the melting point is preferably 50 ° C. or higher. From these viewpoints, the melting point is more preferably from 80 to 150C, and most preferably 110C. The melting point is
The values are based on a Yanamoto Digital Micro Melting Point Measuring Instrument “MP-500D” manufactured by Yanaco Equipment Development Laboratory Co., Ltd.

Further, the sponge hardness of the soft resin 11 is preferably 20 degrees or more from the viewpoint of ink dischargeability. When the handle 80 is pressed down during plate making and stamping, the soft resin 11 adheres to the stamp placed thereon. It is preferably 50 degrees or less from the viewpoint of improving the properties. The sponge hardness is a value measured by an Asker C type hardness meter manufactured by Kobunshi Keiki Co., Ltd.

The average pore diameter of the soft resin 11 is preferably 0.01 mm or more from the viewpoint of smoothness of ink bleeding, and is preferably 0.0 mm or more from the viewpoint of clarity of the imprint on the stamp surface.
5 mm or less.

The hard resin 12 must have a compressive strength of 5 kgf / cm ² or more when deformed by 25%.
With such strength, when bonded to the soft resin 11 as described above, the function of preventing the soft resin 11 from swelling can be achieved. Also, as shown in FIGS. 2 to 5, even when the spacers 20 are provided, the adverse effect of the ink circulation holes 21 provided in the spacers 20 does not occur during plate making. That is, when the stamp material 10 on which the spacers 20 are arranged is pressed via the spacers 20 onto the laminate made of a manuscript sheet or the like at the time of plate making, the hard resin 12 having a predetermined strength is present. The soft resin portion under the ink-transmitting through-hole 21 is also sufficiently pressed, and is brought into close contact with the laminate. For this reason, even at that portion, light leakage or the like does not occur at the time of exposure, and the line image of the plate-making stamp surface is entirely clear.

The material of the hard resin 12 is not limited as long as it has a porosity (porosity having open cells) permitting the intrusion and bleeding of the ink and has the above-mentioned physical properties. (Trade name: Kanebo Beruita, part number A series, manufactured by Kanebo Co., Ltd.), porous vinyl chloride (sintered vinyl chloride), porous nylon (sintered nylon), and the like.

The thickness of the layer of the soft resin 11 is usually 0.5 to
2 mm. If it is thicker than this, ink will not pass easily,
If it is thin, a large stamping load is required. From this viewpoint, the thickness is preferably about 1 mm. Hard resin 1
The thickness of the second layer is usually 0.5 to 4 mm. If the thickness is larger than this, it is difficult for the ink to pass through. If the thickness is smaller, it is difficult to prevent the swelling of the soft resin 11 and the adverse effect of the ink transmitting through-hole 31.
From this viewpoint, the thickness is preferably about 1 mm.

The present invention is not limited to the above-described embodiment. For example, what is point-adhered to the soft resin 11 is another hard porous body (for example, ceramic) instead of the hard porous resin 12. Is also good.

[0037]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described. For a polyurethane flat 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 °, a thickness of 1 mm, a length of 35 mm,
A rigid porous resin made of polyvinyl formal having a width of 35 mm and having various physical properties shown in Table 1 below was bonded in halftone dots at a pitch of 5 mm with a commercially available instant adhesive to form a plurality of stamping materials.

Using these stamping materials, stamps with an unprinted plate stamping material having the same structure as shown in FIGS. 3 to 5 were manufactured. Thereafter, the original sheet 626 and the transparent plate 6 shown in FIG.
17, each stamp is pressed under the same conditions, and in that state, light is blocked from the surroundings, and from the original sheet side,
Xenon lamp light with a capacitor capacity of 9000 μF and a voltage of 330 V was applied.

Observe the imprint of the stamp having the stamped surface made in this manner. Also, as the hardness is higher, the ink impermeability of the ink non-bleeding part at the time of plate making becomes higher, so that the ink impermeability is also observed. And evaluated them. Table 1 also shows the results.

[0040]

[Table 1]

As is apparent from the results shown in Table 1,
Compressive strength of 25% deformation of hard porous resin is 5kgf
/ Cm ² or more, there is no problem in imprint and swelling, and particularly when it is 10 kgf / cm ² or more, extremely excellent stamping performance is exhibited.

[0042]

As described above in detail, according to the stamping material of the present invention, the rigid porous body has a compressive strength of 5 kgf / kg.
Since it is not less than ² cm ² , it can function to prevent swelling of the porous resin when adhered to the plate-shaped porous resin. Further, since the rigid porous body and the plate-shaped porous resin are bonded in a point-like manner at a number of points, the ink can be sent from the rigid porous body to the plate-shaped porous resin. Therefore, the rigid porous body having the above strength cannot prevent swelling of the plate-like porous resin.

According to a second aspect of the present invention, there is provided a stamp material, wherein:
A spacer provided with a large number of through holes for ink transmission is disposed on the back surface of the surface to which the flat porous resin is adhered. Even in the printing material in which the spacers are arranged as described above, due to the rigid porous body, a sufficient pressing force is applied also to the plate-like porous resin portion below the ink transmitting through holes of the spacers during plate making, and thus the original It is in close contact with a laminate made of a film or the like. Therefore, the exposure is not blurred, and the line drawing on the plate making stamp is entirely clear.

According to the third aspect of the present invention, since the hard porous body is made of a porous resin, the rigid porous body can be easily welded to the holder on which the stamping material is set, thereby facilitating the manufacture of a simple stamp. According to the fourth aspect of the present invention, since the flat porous resin has predetermined physical properties, a very high quality imprint can be formed by imprinting the manufactured imprint.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a stamping material according to the present invention.

FIG. 2 is an exploded perspective view of a stamp holder provided with the stamp.

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

FIG. 4 is a vertical sectional view of the stamp.

FIG. 5 is a front view of the stamp.

FIG. 6 is a schematic view showing a prior art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Stamp material, 11 Soft resin, 12 Hard resin, 20
Holder, 30 spacer, 50 skirt member, 60
Coil spring, 70 cap, 80 handle.

Claims (4)

[Claims] The ink has a porosity that allows ink to enter and bleed, and a portion irradiated with light is blocked by heat generated by energy conversion to become a non-bleed portion of ink, and the other portion becomes a bleed portion of ink. A stamping material comprising a plate-shaped porous resin capable of forming a stamping surface, wherein a hard porous body harder than the porous resin is adhered to a surface on the back side of the stamping surface, and the compressive strength of the hard porous body is 5kgf / at 25% deformation
cm ² or more, characterized in that the rigid porous body and the plate-shaped porous resin are point-adhered at a number of points. 2. A printing material, wherein a spacer provided with a large number of through holes for ink transmission is arranged on the back surface of the hard porous body to which the flat porous resin is adhered. 3. The stamp according to claim 1, wherein the hard porous body is made of a porous resin. 4. The flat porous resin has a melting point of 50 to 50.
The stamp material according to any one of claims 1 to 3, wherein the temperature is 200C, the sponge hardness is 20 to 50 degrees, and the average pore diameter is 0.01 to 0.05 mm.