JP2000158859A - Sheet for pressure-sensitive adhesive print - Google Patents

Abstract

PROBLEM TO BE SOLVED: To overcome the defect that printed characters lack and become unclear when the doubled faces are peeled off to improve adhesive properties of a heat-melting toner made of an acrylic resin or the like. SOLUTION: This sheet has faces 3 to be superposed in a peelable manner, it has a printing entry part 5 with a heat-melting toner, formed of a curable layer 4 of a radiation-curable pressure-sensitive adhesive which is made of a photosensitive resin composition containing an acrylic photopolymerizable monomer and a photopolymerization initiator, not containing oligomers and is adhesive to the to-be-superposed face 3 of the sheet under a specified pressure, not under a normal condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to
The present invention relates to a pressure-sensitive adhesive printing sheet provided with a printed portion of a heat-fusible toner composed of a cured layer of a radiation-curable pressure-sensitive adhesive and having improved adhesion of the toner.

[0002]

2. Description of the Related Art In recent years, with the revision of the Postal Law, postcard systems having confidentiality have been put to practical use and have begun to spread. This postcard system having confidentiality includes, for example, various types of information, such as folding, cutting, or superimposing separate postcards on which personal information or various information such as print information and print information are described. The information is concealed in a superimposed manner, and the information is concealed, mailed, and then the recipient reads the concealed information by peeling off the superimposed surface again.

[0003] As a pressure-sensitive adhesive printing sheet used in a postcard system, for example, a non-peelable adhesive base and a non-peelable adhesive base are provided on a superposed surface of a base sheet carrying information. Provided with an adhesive layer composed of an adhesive composition composed of a particulate filler exhibiting affinity (Japanese Patent Laid-Open No. 4-5)
No. 9395), a substrate sheet surface which has been printed in advance and an adhesive layer is provided on this surface (Japanese Utility Model Laid-Open No. 57-147069).
Japanese Patent Application Laid-open No. Hei 7 (1999) -197, which is subjected to process printing, solid printing or copy-forgery-inhibited pattern printing on the superposed surface of the base sheet, and provided thereon with an adhesive layer having releasability, transparency and toner receptivity. No. 188378) are known, and in each of these, a pressure-sensitive adhesive which combines an aqueous medium such as an aqueous emulsion or rubber latex is used as the adhesive.

However, when toner printing is performed on an adhesive layer formed of a pressure-sensitive adhesive that incorporates such an aqueous medium, the adhesion (fixing property) of a hot-melt toner made of an acrylic resin or the like is poor. There was a drawback that the printed characters were missing and blurred when the overlapping surface was peeled off.

[0005]

SUMMARY OF THE INVENTION The present invention overcomes the drawbacks of the conventional pressure-sensitive adhesive printing sheet and improves the adhesion of a hot-melt toner made of an acrylic resin or the like. An object of the present invention is to provide a pressure-sensitive adhesive printing sheet.

[0006]

The present inventors have conducted various studies on pressure-sensitive adhesive printing sheets. As a result, the present inventors have found that radiation-curable pressure-sensitive adhesives, especially oligomers, are contained as pressure-sensitive adhesives. Without using a radiation-curable pressure-sensitive adhesive containing an acrylic photopolymerizable monomer and a photopolymerization initiator, the adhesiveness of a hot-melt toner composed of an acrylic resin or the like is improved, and further, The present inventors have found that the applicability of the pressure-sensitive adhesive is excellent, and based on this finding, have accomplished the present invention.

That is, the pressure-sensitive adhesive printing sheet of the present invention is a lapping sheet to which a lapping surface is releasably adhered, and which is normally adhered to the lapping surface of the lapping sheet. Radiation curing formed from a photosensitive resin composition containing an acrylic photopolymerizable monomer and a photopolymerization initiator without containing oligomers, which adheres by applying a predetermined pressure without performing A printing portion for printing a hot-melt toner comprising a cured layer of a pressure-sensitive adhesive is provided.

Therefore, according to the pressure-sensitive adhesive printing sheet of the present invention, the printing portion provided on the superposed surface has excellent compatibility with the hot-melt toner, and the printed characters and patterns have good adhesion. Good, no blur when peeling. Further, since the pressure-sensitive adhesive of the present invention does not contain oligomers such as acrylic photopolymerizable oligomers,
The low viscosity of the adhesive at the time of application gives a good leveling state, and the foaming is small, so that the application suitability is excellent.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The base sheet material for the pressure-sensitive adhesive printing sheet of the present invention includes art paper, machine-coated paper, color lithographic paper, baryta paper, glossy paper, synthetic paper, plastic film and the like. Any material can be selected from the materials commonly used as the base material of the pressure-sensitive adhesive printing sheet.

In the present invention, a photosensitive resin composition containing an acrylic photopolymerizable monomer and a photopolymerization initiator is used as a radiation-curable pressure-sensitive adhesive for forming a cured layer that can be peeled off after bonding. It is necessary to use. Examples of the acrylic photopolymerizable monomer include unsaturated carboxylic acids such as acrylic acid and methacrylic acid and esters thereof, for example, alkyl-, cycloalkyl-, halogenated alkyl-, alkoxyalkyl-, hydroxyalkyl-, and aminoalkyl-. , Tetrahydrofurfuryl-, allyl-, glycidyl-, benzyl-, phenoxy-acrylate and methacrylate, lower alkylene glycol, acrylamide, methacrylamide or derivatives thereof, such as acrylamide mono- or di-substituted with an alkyl group or a hydroxyalkyl group and Examples include methacrylamide, diacetone acrylamide and methacrylamide, N, N / -alkylenebisacrylamide and methacrylamide. These may be used alone or in combination of two or more.

As the photopolymerization initiator used together with the acrylic photopolymerizable monomer, any one can be selected from known photopolymerization initiators in a usual photosensitive resin composition. . Examples of such a photopolymerization initiator include benzoin, benzoin ethyl ether, benzoin-n-propyl ether, benzoin-isopropyl ether, and benzoin isobutyl-
Benzoin alkyl ethers such as ethers, 2,2
-Dimethoxy-2-phenylacetophenone, benzophenone, benzyl, diacetyl, diphenylsulfide, eosine, thionine, 9,10-anthraquinone,
2-ethyl-9,10-anthraquinone and the like. These photopolymerization initiators may be used alone or in combination of two or more. The combined amount is usually selected in the range of 0.1 to 10 parts by weight per 100 parts by weight of the acrylic photopolymerizable monomer.

The radiation-curable pressure-sensitive adhesive used in the present invention may be used, if desired, in order to prevent the adhesive force from increasing over time after peeling and to make it difficult to peel off or to prevent blocking. Can be combined with a fine particle filler. As such a fine particle filler, one having a small affinity for the two components described above and having a particle shape regularly arranged is preferable because it is necessary not to hinder the transparency of the cured layer. . Such materials include, for example, various types of starch, synthetic zeolite, fine spherical acrylic resin, fine spherical methacrylic resin, fine spherical polyethylene, spherical alumina, glass powder, shirasu balloon, activated clay, and the like. These fillers may be used alone or in combination of two or more.

However, silica, titanium oxide, zinc oxide, and the like, which have been conventionally used as a filler for this kind of adhesive composition, have irregular particle shapes, and therefore, promote a diffuse reflection of light on the cured layer. However, it is preferable not to add them. However, when they are added, it is preferable that the addition amount is 10% by weight or less. In addition, it is suitable that these fine particle fillers have an average particle diameter of 1 to 20 μm, preferably 2 to 5 μm.

When this fine particle filler is combined,
It is necessary to select the compounding ratio appropriately. If the compounding amount of the fine particle filler is too small, the blocking resistance is reduced, and the adhesive force is too strong to be easily peeled off, and if the amount is too large, the adhesive force is too low, and sufficient adhesiveness is obtained. No longer shown. Therefore, the mixing ratio of the fine particle filler is 100 to 300 parts by weight, preferably 130 to 250 parts by weight, more preferably 150 to 20 parts by weight, when the total amount of the radiation-curable pressure-sensitive adhesive is 100 parts by weight.
It is better to select within the range of 0 parts by weight.

The photosensitive composition for forming the cured layer of the present invention may contain, if desired, additional components commonly used in general photosensitive resin compositions, such as a thermal polymerization inhibitor, a tackifier, a viscosity modifier, and the like. An adjusting agent, an antioxidant, a stabilizer, a colorant, a fine particle filler, and the like can be combined. Examples of the thermal polymerization inhibitor include hydroquinone, mono-tert-butylhydroquinone, benzoquinone, 2,5-diphenyl-p
-Benzoquinone, picric acid, di-p-fluorophenylamine, di-p-methoxyphenol, 2,6-ditert-butyl-p-cresol and the like.
These thermal polymerization inhibitors are for preventing a thermal polymerization reaction, and therefore, the content of the thermal polymerization inhibitor is:
Usually, it is selected in the range of 0.01 to 5 parts by weight per 100 parts by weight of the adhesive base.

The pressure-sensitive adhesive printing sheet of the present invention comprises:
For example, it can be manufactured as follows. That is, a predetermined base sheet is folded, tri-folded, cut and overlapped, or a portion facing each other by superimposition of separate bodies is coated with a gravure coater, flexo, an air knife coater, a bar coater, or the like. The radiation-curable pressure-sensitive adhesive composition is applied, but the application portion at this time requires an area to be performed on a portion to be printed with the hot-melt toner, and may be over the entire surface of the base sheet, It may be performed only on a part of the surface.

In the present invention, when a plastic film such as polyethylene, polypropylene, polyethylene terephthalate, or polyvinyl chloride is used as the base sheet, the surface of the base sheet is subjected to a mat treatment,
It is preferable to perform a surface treatment such as a corona treatment. Also,
The amount of the adhesive applied to the base sheet surface is determined by the adhesiveness of the cured layer,
1 to 30 g / m2 for maintaining peelability or transparency
2, preferably 3 to 20 g / m 2, more preferably 5 to 20 g / m 2
It is selected to be in the range of 15 g / m2.

After the pressure-sensitive adhesive printing sheet manufactured in this manner is irradiated with radiation such as ultraviolet rays, electron beams, X-rays, i-rays, and g-rays to cure the adhesive layer appropriately. Then, the cured adhesive layers on each side are overlapped, and are adhered under a pressure of about 1 to 100 kg / cm 2 by, for example, a pressure roller.

The adhesiveness and the removability after adhesion of the pressure-sensitive adhesive printing sheet of the present invention can be adjusted by changing the type of acrylic photopolymerizable monomer, the number of functional groups, the roller pressure at the time of adhesion, and the like. Can be. In general, as the number of functional groups of the acrylic photopolymerizable monomer increases, the bonding surface becomes harder and the bonding force decreases, and as the roller pressure during bonding increases, the bonding force increases.

The cured layer of the radiation-curable pressure-sensitive adhesive according to the present invention needs to have appropriate adhesiveness and removability. This is a sample 2 obtained by cutting a solid printed Kent paper to a width of 25 mm and a length of 100 mm over the entire surface.
The sheets were laminated with a length of 25 mm, and pressed under a load of 50 kg / cm 2 to obtain a peel strength of 50 to 150 g measured using an Autograph AGS50 (manufactured by Shimadzu Corporation).
/ 25 mm, preferably in the range of 80 to 120 g / 25 mm. If the adhesive strength is less than 50 g / 25 mm, the adhesiveness at the time of pressure bonding is low, and it is easy to peel off.
If it is larger than 25 mm, it will be difficult to re-peel and cannot be opened when necessary.

In the pressure-sensitive adhesive printing sheet of the present invention, the printing of information on the cured layer of the radiation-curable pressure-sensitive adhesive is performed by a hot-melt toner. Based resin toner is good. Currently, generally used hot-melt toners include, in addition to the current mainstream acrylic resins, those mainly composed of epoxy resins, polystyrene resins, polyester resins, and polypropylene resins. All of these toners adhere to the cured layer of the radiation-curable pressure-sensitive adhesive of the present invention. However, by using an acrylic resin similar to the cured layer, the adhesion between the toner and the cured layer is improved. Significantly increase and provide very good information.

Next, examples of the structure of the pressure-sensitive adhesive print sheet of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to these examples. Here, FIG. 1 is a plan view of a two-fold pressure-sensitive adhesive printing sheet as a first configuration example of the present invention, FIG. 2 is a cross-sectional view taken along line XX of FIG. 1, and FIG. FIG. 4 is a sectional view of the pressure-sensitive adhesive print sheet of FIG. 1 after printing according to FIG. 1, FIG. 4 is a cross-sectional view taken along line XX of FIG. 3, and FIG. 5 is a superposition of the pressure-sensitive adhesive print sheet of FIG. State explanatory view, FIG. 6 is a plan view of a tri-fold pressure-sensitive adhesive print sheet as a second configuration example of the present invention, and FIG. 7 is a rear plan view of the pressure-sensitive adhesive print sheet of FIG. 8 is a diagram illustrating the state of the tri-fold pressure-sensitive adhesive print sheet of FIG. 6 after printing with the hot-melt toner, and FIG. 9 is the tri-fold pressure-sensitive adhesive print sheet of FIG. 7 after printing with the hot-melt toner. FIG. 10 is an explanatory view of a state of superposition of the pressure-sensitive adhesive print sheet of FIG. FIG. 11 is an explanatory view of various means for facilitating peeling of a superposed surface after bonding, FIG. 12 is an explanatory view of a superposed state of a pressure-sensitive adhesive print sheet configured as another three-fold information hiding postcard, and FIG. It is an explanatory view of the state of superposition of the sheet for pressure sensitive adhesive printing constituted as yet another three fold information hiding postcard.

The first embodiment of the present invention shown in FIGS. 1 to 5 is a two-fold pressure-sensitive adhesive printing sheet 1 configured as a "concealed postcard". This is the base sheet 2
Is divided into an upper sheet A and a lower sheet C by a folding perforation line Mf, and carries concealment information in a state of being folded in two as shown in FIG. 5, as shown in FIGS. 1 and 2. In addition to the general printing, the base sheet 2 is provided with a print entry section 5 such as a date entry section, an article name entry section, a price entry section, and the like. A cured layer 4 of a radiation-curable adhesive is applied to the entire surface of the overlapping surface 3. Then, as shown in FIG. 3 and FIG. 4, the print entry section 5 is subjected to printing Tp using hot-melt toner.

In this embodiment, cuts K are provided at the corners of the upper paper piece A to cause a partial step between the upper paper piece A and the lower paper piece C, thereby facilitating peeling of the superposed surface after bonding. And As shown in FIG. 11, such a means for facilitating peeling may be, as shown in FIG. 11, (a) a step formed by making a cut K at a corner of the overlapping surface, or (b) a side of the overlapping surface. Cut K in the part to provide a step,
(C) A method of extending the flap piece F on one of the overlapping surfaces to provide a step can be adopted.

The second embodiment of the present invention shown in FIGS. 6 to 10 is a three-fold pressure-sensitive adhesive print sheet 1 configured as a "concealed postcard". This is because the base sheet 2 is divided into an upper sheet piece A, a middle sheet piece B, and a lower sheet piece C by two folding perforation lines Mf, Mf, and as shown in FIG. It carries concealment information in a state. As shown in FIGS. 6 and 7, on the front and back surfaces of the base sheet 2, in addition to general printing, a print entry section 5 such as a date entry section, an article name entry section, and a price entry section is provided. A cured layer 4 of a radiation-curable adhesive is applied to the entire surface of each of the overlapping surfaces 3 when folded in a Z-shape including the writing section 5. Then, as shown in FIGS. 8 and 9, the print entry section 5 is subjected to printing Tp using hot-melt toner. Note that the portion on which the postal code and address are printed as shown in FIG. 8 is not a superimposed surface, and therefore, in this embodiment, no hardened layer is provided.

Here, several application examples of the pressure-sensitive adhesive printing sheet of the present invention will be described. For example, FIG.
The pressure-sensitive adhesive print sheet 1 constituting another three-fold information concealment postcard shown in FIG. 1 includes an upper sheet A, a middle sheet B, and a lower sheet C folded in a Z-shape with folding machine lines Mf, Mf. In the same manner as in the above-described embodiment, a predetermined window such as a notch K is provided, and a display window in which a postcard display H provided on a middle paper sheet B which looks like a postcard body can be seen through the upper paper sheet A. Die cutting for forming the hole W is also performed.

Further, a pressure-sensitive adhesive printing sheet 1 constituting still another three-fold information hiding postcard shown in FIG.
Is composed of an upper sheet A, a middle sheet B, and a lower sheet C which are cut and overlapped. Similarly, a predetermined processing such as a notch K is applied thereto, and a portion including a postcard display H, Slit S processing or the like is also performed to partition and separate a predetermined region R1 in which the upper paper piece A and the middle paper piece B, which looks like the postcard main body, are strongly adhered so as to be difficult to peel off, and another peelable area R2.

[0028]

Next, the present invention will be described in more detail by way of examples. The adhesiveness and print adhesion of the pressure-sensitive adhesive print sheet in each example, as well as the leveling state and foaming state of the adhesive at the time of applying the adhesive were evaluated by the following methods.

Adhesion: The sheet obtained in each example was applied to a sheet having a width of 25 m.
m, cut into a length of 100 mm to prepare a sample, and these two samples were overlapped with a length of 25 mm to obtain a sample of 50 kg / cm.
After applying a load of 2,100 kg / cm2 and pressure bonding, the peel strength was measured using an Autograph AGS50 (manufactured by Shimadzu Corporation) and evaluated according to the following criteria. 80 to 120 g / 25 mm A 50 to 80 g / 25 mm or 120 to 150 g / 25 mm B 30 to 50 g / 25 mm or 150 to 180 g / 25 mm C Less than 30 g / 25 mm or more than 180 g / 25 mm D

Print adhesion: A paper or film coated with an adhesive having a different adhesive strength to stainless steel SUS304 is adhered to the surface of the adhesive, then slowly peeled off, and a hot-melt toner made of an acrylic resin Was evaluated according to the following criteria in accordance with JISZ0237. Adhesive tape with adhesive strength of 1 kg / 25 mm is applied and no printing is peeled off. ◎ Adhesive tape with adhesive strength of 500 g / 25 mm is applied and printed is not peeled off. No printing peeling △ Printing peeling was observed even when adhesive tape with adhesive strength of 250g / 25mm was applied and peeled.

Leveling state: 20 g of the pressure-sensitive adhesive is dropped on the center of a 10 cm-diameter dish-shaped cylindrical container, and the dispersion state of the adhesive in the container is relatively compared within a predetermined time (5 seconds). Was. ◎ indicates good dispersion state, は indicates average dispersion state, and △ indicates poor dispersion state.

Foaming state: 200 g of a predetermined amount of pressure-sensitive adhesive
Was placed in a 300 cc beaker, stirred with a small stirrer for 10 minutes, the state of foaming was confirmed, and a relative comparison was made. ◎ indicates that the amount of generated bubbles is small, ○ indicates that the amount of generated bubbles is average, and △ indicates that the amount of generated bubbles is large.

Example 1 As an acrylic photopolymerizable monomer, photopolymerization was carried out at a ratio of 5% by weight to 100 parts by weight of a triacrylate of propylene oxide adduct of trimethylol (product name: M-320, manufactured by Toagosei Co., Ltd.). An initiator (manufactured by Nippon Ciba Geigy Co., Ltd., registered trademark “Irgacure” 500) was added.
The radiation-curable composition obtained in this manner was used in an amount of 110 k
g of coated paper was applied by a wire bar at a rate of 10 g / m <2>, and then exposed and cured using an ultraviolet irradiation device manufactured by Eye Graphics Co., Ltd. Thus, a pressure-sensitive adhesive printing sheet having a colorless, transparent and glossy cured layer was produced. Next, printing was performed on the cured layer using a commercially available acrylic hot-melt toner. The adhesive and printing adhesiveness, as well as the leveling state and foaming state of the adhesive at the time of applying the adhesive were evaluated.
Shown in

Example 2 As an acrylic photopolymerizable monomer, 50 parts by weight of a triacrylate of propylene oxide adduct of trimethylol (product name: M-320, manufactured by Toa Gosei Co., Ltd.) and 2-ethylhexyl carbitol acrylate (Toa Gosei Co., Ltd.) A sheet for pressure-sensitive adhesive printing was produced in the same manner as in Example 1 except that a mixture with 50 parts by weight (manufactured by Co., Ltd., product name: M-120) was used. Table 1 shows the adhesiveness and print adhesion, as well as the leveling state and foaming state of the adhesive when the adhesive was applied.

Example 3 The procedure of Example 1 was repeated except that a mixture of 50 parts by weight of trimethylolpropane triacrylate and 50 parts by weight of 1,6-hexanediol diacrylate was used as an acrylic photopolymerizable monomer. An adhesive printing sheet was manufactured. Along with the adhesive and print adhesion of this product,
The leveling state and foaming state of the adhesive at the time of applying the adhesive were evaluated, and the results are shown in Table 1.

Example 4 As a photopolymerizable monomer, 40 parts by weight of triacrylate of propylene oxide adduct of trimethylol (product name: M-320, manufactured by Toagosei Co., Ltd.) and 2-ethylhexyl carbitol acrylate (Toagosei Co., Ltd.) A product for pressure-sensitive adhesive printing was produced in the same manner as in Example 1 except that a mixture of 30 parts by weight of a product (M-120) and 30 parts by weight of 1,6-hexanediol diacrylate was used. Table 1 shows the adhesiveness and print adhesion, as well as the leveling state and foaming state of the adhesive when the adhesive was applied.

Comparative Example 1 60 parts by weight of a methacryl-modified polybutadiene oligomer (manufactured by Nippon Soda Co., Ltd., product name: TEA-1000)
As an acrylic photopolymerizable monomer, 40 parts by weight of triacrylate of propylene oxide adduct of trimethylol (product name: M-320, manufactured by Toagosei Co., Ltd.) was added,
A photopolymerization initiator (manufactured by Nippon Ciba Geigy Co., Ltd., trade name “Irgacure” 50) was added at a ratio of 5% by weight to this mixture.
0) was added. Thereafter, a sheet for pressure-sensitive adhesive printing was manufactured in the same manner as in Example 1. Table 1 shows the evaluation of the leveling state and foaming state of the adhesive at the time of application of the adhesive, together with the adhesiveness and print adhesion of the adhesive.

Comparative Example 2 As acrylic-based photopolymerizable monomers, 20 parts by weight of triacrylate of propylene oxide adduct of trimethylol (product name: M-320, manufactured by Toa Gosei Co., Ltd.) and 2-ethylhexyl carbitol acrylate (Toa Gosei Co., Ltd.) A sheet for pressure-sensitive adhesive printing was produced in the same manner as in Comparative Example 1 except that a mixture with 20 parts by weight (manufactured by Co., Ltd., product name: M-120) was used. Table 1 shows the adhesiveness and print adhesion, as well as the leveling state and foaming state of the adhesive when the adhesive was applied.

Comparative Example 3 As an oligomer, a acryl-modified urethane oligomer (product name: UV-3000B, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.)
Pressure-sensitive in the same manner as in Comparative Example 1 except for using 60 parts by weight and using a mixture of 20 parts by weight of trimethylolpropane triacrylate and 20 parts by weight of 1,6-hexanediol diacrylate as the acrylic photopolymerizable monomer. An adhesive printing sheet was manufactured. Table 1 shows the adhesiveness and print adhesion, as well as the leveling state and foaming state of the adhesive when the adhesive was applied.

Comparative Example 4 Acrylic-modified urethane oligomer as oligomer (product name UV-3000B, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.)
A pressure-sensitive adhesive printing sheet was produced in the same manner as in Comparative Example 1 except that the viscosity was adjusted by using 60 parts by weight and adding 20 parts by weight of isopropyl alcohol. Table 1 shows the adhesiveness and print adhesion, as well as the leveling state and foaming state of the adhesive when the adhesive was applied.

[0041]

[Table 1]

From this table, it can be seen from the table that the adhesiveness of each of the Examples and Comparative Examples does not have any particular problem, and that it can be used as a pressure-sensitive adhesive printing sheet. It can be seen that those of the respective examples which did not contain acryl-based photopolymerizable monomer as the main component were superior to those of the respective comparative examples which contained the oligomer. Further, the leveling state and the foaming state of the pressure-sensitive adhesive in each of the examples containing no oligomer were better than the leveling state and the foaming state of the pressure-sensitive adhesive in each comparative example containing the oligomer.

[0043]

As described above, according to the pressure-sensitive adhesive printing sheet of the present invention, the printed portion provided on the superposed surface is excellent in compatibility with the hot-melt toner, and the printed character is printed. The pattern has good adhesiveness and does not become unclear when peeled off. Furthermore, since the pressure-sensitive adhesive of the present invention does not contain oligomers such as acrylic photopolymerizable oligomers, the viscosity of the adhesive at the time of application is low, so that the leveling state is good, and the foaming is small, so that the application is suitable for application. The effects such as excellence are supported.

[Brief description of the drawings]

FIG. 1 is a plan view of a two-fold pressure-sensitive adhesive print sheet that is a first configuration example of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is an explanatory view of a state of the sheet for pressure-sensitive adhesive printing in two in FIG. 1 after printing with a hot-melt toner.

FIG. 4 is a sectional view taken along line XX of FIG. 3;

FIG. 5 is an explanatory view of a state of superposition of the pressure-sensitive adhesive print sheet of FIG. 1;

FIG. 6 is a plan view of a three-fold pressure-sensitive adhesive print sheet that is a second configuration example of the present invention.

FIG. 7 is a rear plan view of the pressure-sensitive adhesive printing sheet of FIG. 6;

FIG. 8 is an explanatory view of the state of the sheet for a two-fold pressure-sensitive adhesive print of FIG. 6 after printing with a hot-melt toner.

9 is an explanatory diagram of the state of the sheet for two-fold pressure-sensitive adhesive printing of FIG. 7 after printing with a hot-melt toner.

FIG. 10 is an explanatory view of a state of superposition of the pressure-sensitive adhesive print sheet of FIG. 6;

FIG. 11 is an explanatory view of various means for facilitating peeling of a superposed surface after bonding.

FIG. 12 is an explanatory view of a superimposed state of a pressure-sensitive adhesive printing sheet configured as another three-fold information hiding postcard.

FIG. 13 is an explanatory view of a superposed state of a pressure-sensitive adhesive print sheet configured as still another three-fold information hiding postcard.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pressure-sensitive adhesive printing sheet 2 base sheet 3 overlapping surface 4 cured layer of radiation-curable pressure-sensitive adhesive 5 printing portion of hot-melt toner Tp printing with hot-melt toner A top sheet B middle sheet C bottom Paper Sheet Mf Folding Sewing Wire

Claims (1)

[Claims] 1. A laminating sheet having a laminating surface adhered releasably, wherein a predetermined pressure is applied to the laminating surface of the laminating sheet in a normal state without bonding. Adhesive, heat-melting consisting of a cured layer of a radiation-curable pressure-sensitive adhesive formed from a photosensitive resin composition containing an acrylic photopolymerizable monomer and a photopolymerization initiator without containing oligomers Pressure-sensitive adhesive printing sheet provided with a printing portion for a neutral toner.