JPH1159030A - Manufacture of overlapping sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for an overlapped sheet in which defects of generating inconveniences such as the deterioration of a bonding agent caused by heat or ultraviolet rays, the curling of sheets, the insufficient printing gloss and the generation of defects generated by the poor fixing of ink are eliminated. SOLUTION: Printing is carried out in ink for a non-absorbent material to be printed on a pressure-sensitive bonding agent which is provided on a sheet surface 1, whereon printing can be carried out and releasable after bonding, and ink can be dried quickly to eliminate the necessity of heat drying or ultraviolet emission after printing, and the defects such as the deterioration of the bonding agent caused by heating or ultraviolet rays, the curling of sheets, the insufficient printing gloss and the poor fixing of ink are not generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a non-absorbable printing material such as a pressure-sensitive adhesive printing sheet or synthetic paper provided with a pressure-sensitive adhesive which can be peeled off after bonding at least on its main surface. Postcards, envelopes, notices, forms, etc., in which sheets are stacked and bonded in various modes such as folding, folding, cutting and stacking, and sheet to sheet, and concealment information is printed or printed on the overlapping surface And a method of creating a superimposed sheet for creating various cards. The concealment information can be used alone or in combination with the concealment information as required.

[0002]

2. Description of the Related Art Conventionally, in order to print concealment information on a superimposed surface of a superimposed sheet, prior to this printing operation, printing of accompanying items such as display columns is performed on the superimposed surface. ing. However, it is usual to provide an adhesive on this overlapping surface in advance,
When printing and printing are performed on the adhesive, there is a problem that the absorption and drying of the ink and the coloring agent are hindered by the adhesive, so that the adhesive hardly penetrates and the ink is hardly dried.
Conventionally, in order to forcibly dry the ink, the sheet is heated by an appropriate means, or ultraviolet drying ink is used,
Drying by ultraviolet rays was performed.

[0003]

For this reason, conventionally, the adhesive has been deteriorated by heating or ultraviolet rays,
There have been disadvantages such as curling of the sheet, lack of print gloss, poor fixation of ink, and dropping.

[0004] An object of the present invention is to provide a method for producing a sheet for superposition in which such disadvantages are eliminated.

[0005]

SUMMARY OF THE INVENTION In order to achieve this object, the present invention enables printing or printing on a predetermined portion of a sheet, and does not normally adhere, but can adhere when given certain conditions. After the bonding, without impairing the applied printing or printing, after providing a peelable pressure-sensitive adhesive, a predetermined printing on the pressure-sensitive adhesive with a non-absorbable printing material ink, This is a method for producing a sheet for superimposition in which predetermined printing is performed on the pressure-sensitive adhesive.

More specifically, the present invention relates to a non-absorbable ink for a printing material comprising 30 to 95% by weight of a polyamide resin and a hydroxyl group-containing aromatic resin having a hydroxyl value of 50 to 150 and a softening point of 40 to 160 ° C. In addition to an ink containing a mixture of 70 to 5% by weight as a component of a vehicle, benzyl acetate, an ink containing a polyamine adduct of an epoxy resin as a main component of a vehicle, and a paraffin content of 50% by weight. An ink containing the above petroleum solvent in an amount of 5% by weight or more can be used.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for producing a sheet for superposition according to the present invention will be described in more detail with reference to an embodiment shown in the drawings.

(First Embodiment) FIG. 1 shows an example of a first embodiment. As shown in FIG. 4, at least one of the superposed surfaces is usually substantially in advance. A sheet 1 having a pressure-sensitive adhesive layer 2 that does not adhere but adheres when pressure is applied is provided in the facility 10 in the form of, for example, a roll, and can be fed in the direction of a discharge port 35 by feeding rolls 34, 34. I have.

In the present invention, the sheet 1 is provided with information writing means 30 for writing information on the overlapping surface. Examples of the information writing means 30 include letterpress printing using non-absorbable printing material ink,
As lithographic printing such as offset printing and the individual information recording method, writing means such as heat-sensitive recording, pressure-sensitive recording, ink jet recording, and electrophotographic recording can be used.

Downstream of the information penetrating means 30, folding means 3 for folding the sheet 1 on which information has been written is provided.
1, a bonding means 32 for applying pressure to the folded sheet to bond the superposed surfaces, and a separating means 33 for separating the sheet 1 into individual unit sheets 1A.

As the folding means 31, for example, FIG.
A sailor 31A is used as shown in FIG. The sailor 31A has a guide portion 31a and a folding regulating portion 31b, and folds along the supply direction line in the process of transporting the continuous sheet 1. The confidential information recorded and folded sheets are pressed together at the overlapping surfaces by the bonding means 32 and are releasably bonded by the pressure-sensitive adhesive.

As the bonding means 32, as shown in FIG. 1, an appropriate means such as a flat press method is used in addition to a pressure roll. When the sheet 1 is a continuous sheet, a separating means 33 for separating the sheet into individual unit sheets 1A can be provided. As the separating means 33, besides a rotating roll method having a cutting blade around the sheet, a method shown in FIG. Thus, a guillotine-type cutting device can be used.

The recipient opens the superimposed surface of the unit sheet 1A and reads the information recorded there. Therefore, information can be reliably transmitted as confidential. In the present invention, the sheet 1 is folded.

This sheet can be folded along a sheet supply direction line as in the above-described example, or can be folded in a direction perpendicular to the sheet supply direction. For example, FIG.
As shown in the figure, the leading end side of the single sheet 50 is fed into the second guide 52 through the first guide 51, and in this state, the extruding plate 53 positioned between the two guides 51, 52 is extruded by the moving means 54, and the sheet is folded. Nip roll 55,
The nip is folded by 55.

The nip rolls 55, 55
The completion of the extrusion is electrically detected, and the pressing operation can be performed after the extrusion plate 53 is retracted from the separated state. The folding can be performed in three or more modes in addition to the two-fold mode.

(Second Embodiment) FIG. 2 shows a second embodiment, which is different from the first embodiment in letterpress printing using a non-absorbable printing material ink. After performing lithographic printing such as offset printing, folding means 31
After applying the pressure to the sheet and bonding the overlapping surface with the bonding means 32, the information is written by the individual information spending means 30, and the other configuration is basically the same. Are identical.

In this example, information is recorded after the sheet 1 is folded, and therefore, for example, a thermal recording method is employed. For this reason, the sheet does not substantially adhere in advance to at least one of the overlapping surfaces in a normal state,
A pressure-sensitive adhesive layer that adheres when pressure is applied, and a color that is colored by a physical external force on at least one of the one or the other, or both, of the superposed surfaces; A sheet containing the material is used.

(Other Embodiments) On the other hand, as shown in FIG. 2, the information writing means 30 can also be used as the output means 22 for recording non-confidential information.

The mode in which the confidential information writing means is also used as the output means 22 for recording non-confidential information can be applied to the first embodiment by changing the arrangement position.

Although not shown, the folding means 3
1, the information is written by the information writing means 30, and then, the sheet is bonded by applying pressure to the overlapping surface by the bonding means 32.

However, in this case, it is important to provide the information writing means 30 on the back surface of the surface having the coloring material to achieve heat transfer. The color former may be a heat-sensitive dye or a pressure-sensitive dye.

Various methods can be used for recording or writing individual information, such as electrophotographic recording, electrostatic recording, discharge breakdown recording, electrolytic recording, thermal recording, and the like.
Examples include pressure-sensitive recording, impact recording, ink jet recording, and thermal transfer recording.

Further, in the above-described example, the pressure-sensitive adhesive layer 2 which does not substantially adhere to the sheet 1 in a normal state but adheres when pressure is applied is formed. The sheet 1 is provided with a heat-sensitive adhesive and bonded by applying heat, and the sheet 1 is provided with a re-wet adhesive and provided with moisture to be bonded. be able to.

In the present invention, as long as the respective means are sequentially provided, the present invention is provided in one facility as in the above-described example, and each means or part is separately disposed in tandem. Alternatively, a substantially continuous method may be used.

(About the material used) As the sheet,
A so-called coated paper such as art paper, coated paper, or lightweight coated paper may be used, and a sheet provided with an adhesive layer on a coated surface may be used.
Further, it may be a synthetic paper or a plastic film.

In the present invention, the base material of the pressure-sensitive adhesive is a latex, specifically, a material used in a conventional normal pressure-sensitive adhesive such as a natural rubber, a synthetic rubber or a synthetic resin. Can be arbitrarily selected from the following, but in particular, natural rubber latex obtained by sulfur-free vulcanization of natural rubber and natural rubber latex mixed with methyl methacrylate, and natural rubber obtained by graft polymerization of methyl methacrylate on natural rubber Rubber latex, acryl-modified rubber latex, and a mixture of rubber latex and a protective colloid-based acrylic copolymer emulsion are suitable in terms of blocking resistance, aging resistance, ink adhesion, and the like.

In the pressure-sensitive adhesive layer of the present invention and / or an upper layer described later (the upper layer also functions as the pressure-sensitive adhesive layer of the present invention), the adhesive force of the pressure-sensitive adhesive layer is suppressed, or the surface has irregularities. Contains fine particles for forming.

As the fine particles, regular fine particles and / or irregular fine particles can be used. As the former fixed fine particles, all of the fine particles generally used conventionally can be used.

Specifically, calcite-based precipitated calcium carbonate which forms primary or secondary aggregates, aragonite-based precipitated calcium carbonate which forms primary or secondary aggregates, styrene beads, cereal grains, etc. Powder, modified starch, synthetic fine-particle silica, normal calcium, zinc, magnesium, oxides of metals such as aluminum or titanium,
Hydroxides, carbonates or silicates, or mixtures thereof. White carbon composed of a porous secondary aggregate can also be used.

As the latter irregular fine particles, natural fibers such as pulp cellulose powder, other animal / vegetable fibers, or particles obtained by fibrillating chemical fibers can be used. When pulp cellulose powder is used, it is 20 to 100 μm when observed by a microscope of itself.
Are obtained by adjusting the surface roughness of the base material to randomly form irregularities having a surface set of about 0.4 to 25 μm after coating.

A print sheet containing such irregular fine particles in a pressure-sensitive adhesive contains fine fibrous projections fibrillated on its surface, for example, on the surface of the pressure-sensitive adhesive layer or on the surface layer. Has an irregular stitch structure on its surface.

This kind of fine particles is desirably contained in the pressure-sensitive adhesive layer in an amount of at least 10%, preferably 20 to 100%. When applying the pressure-sensitive adhesive, dissolve the base of the pressure-sensitive adhesive in a solvent, mix and stir the regular fine particles or the irregular fine particles, and coat the substrate with a coater or printing machine. Work.

As the coating method, an air knife coater, a blade coater, a curtain coater, a bar coater, flexographic printing, screen printing, or other coating / printing method is preferable.

In the sheet, one or more surface layers can be provided in addition to providing a pressure-sensitive adhesive on the sheet substrate.

As the surface layer, two or more layers can be provided. The surface layer is a layer formed with one or more functional agents that further enhance the function as a pseudo-adhesive sheet. Many examples of the functional agent can be given.

For example, typically, the above-mentioned irregular fine particles, an antioxidant, an ultraviolet absorption inhibitor, a tackifier,
Lubricants, pigments, anti-slip agents, buffers, antistatic agents,
Surfactants, thickeners, defoamers, release agents, antiblocking agents, printer toner fixing agents and the like.

When the application of the pressure-sensitive adhesive layer is completed or when the surface layer is provided, the surface is pressurized at about 1 to 10 kg / cm ² when the application is completed, and the surface is excessively protruded. It is preferable to make the surface flat and preferably to adjust the surface roughness to 30 to 5 μm.

The adhesive strength of the sheet in the present invention is as follows.
Depending on the application, it can be adjusted by selecting the type of the base of the pressure-sensitive adhesive, the type of the fine particles, the type of the additive, or the compounding ratio of these, but preferably, when pressed by a commercially available sealer, The peel strength at a width of 25 mm is preferably 25 g or more.

The thickness of each layer of each surface layer is desirably 2 μm or less. When several layers are provided, the total thickness is desirably 5 μm or less. It is necessary to increase the surface roughness of the material or to provide a pressure-sensitive adhesive layer having a stronger adhesive force.

[0040]

As is clear from the above description,
According to the present invention, by printing with a non-absorbable printing material ink on an adhesive that is provided on a sheet surface and that can be printed or printed and that can be peeled after bonding, heat drying after printing. Also, there is no need to irradiate ultraviolet rays, and the ink can be dried quickly, so that the adhesive deteriorates due to heating or ultraviolet rays, the sheet curls, the print gloss does not appear, the ink fixation is poor, and the ink drops. Does not occur.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a first embodiment.

FIG. 2 is a schematic diagram showing a second embodiment.

FIG. 3 is a perspective view of an example of a folding unit.

FIG. 4 is a sectional view showing a layer configuration in a folded state.

FIG. 5 is a perspective view of an example of an individual unit sheet.

FIGS. 6A and 6B show examples of folding means having different modes, wherein FIG. 6A shows a first stage and FIG. 6B shows a second stage.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sheet, 1A ... Individual unit sheet, 1a ... Overlap margin part 1b ... Communication information, 2 ... Pressure-sensitive adhesive layer, 10 ... Information transmission sheet forming equipment, 22 ... Output means, 30 ... Information writing means, 31: folding means, 32: bonding means, 3
3. Separation means.

Claims (1)

[Claims] An adhesive which is not adhered in a normal state but can be adhered under a certain condition, and is adhered releasably by laminating at least a sheet provided with an adhesive which can be re-peeled after adhering on a main surface. And a method for producing a sheet for lamination having concealing information on the releasably adhered adhesive surface, wherein the concealing information is applied to a predetermined portion of the pressure-sensitive adhesive which can be peeled off after the sheet is adhered. A method for producing a superposed sheet in which predetermined printing is performed on the adhesive by printing or printing with a printing ink.