JP3403872B2 - Continuum of thermosensitive coloring label and its manufacturing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-sensitive color-developing label continuous body and a method for producing the same.

[0002]

2. Description of the Related Art At present, as an ink to be printed on the surface of a heat-sensitive color developing agent of a heat-sensitive color developing label, it can be dried without heating, so that the UV-curable ink (UV ink) can be printed without coloring the heat-sensitive color developing agent layer. Used favorably.

[0003]

This UV-curable ink has a problem that the printability is not always good and the gloss is insufficient, and the adhesiveness may deteriorate depending on the material to be printed. Therefore, in consideration of such disadvantages of the UV-curable ink, a method of printing on the surface of the thermosensitive color developing agent layer using an oxidation polymerization type dry ink is considered, and the printability and gloss and adverse effects on the thermosensitive color developing agent layer are considered. the I tried to various tests, even if the hand print oxidation polymerization type drying inks in normal printing means, for example, not enough labels are obtained in terms of gloss and the like.

Therefore, the present invention has gloss and the like,
It is an object of the present invention to provide a continuous body of a thermosensitive color-developing label excellent in printability and a method for producing the same.

[0005]

A thermosensitive color-developing label continuum according to claim 1, wherein a thermosensitive color former layer is formed on the surface of a label substrate, and the surface on the thermosensitive color former layer side is printed with an oxidation polymerization type ink. A thermosensitive coloring label continuum in which a polymerized sheet is polymerized on a label substrate so that a coated printing layer is formed and the release agent layer surface of the polymerized sheet is bonded to the printing layer surface.

The heat-sensitive colorable label continuum according to claim 2 is a heat-sensitive colorable label continuum according to claim 1, wherein the release agent layer of the polymer sheet is printed and coated with a release agent containing a silicone resin. is there.

The continuous body of the thermosensitive coloring label according to claim 3 has an adhesive layer formed on the back surface of the label substrate.
Alternatively, it is a continuous body of the heat-sensitive color developing label according to any one of 2).

The method for producing a continuous body of a thermosensitive color developing label according to claim 4 comprises a step of preparing a label base material having a thermosensitive color former layer formed on the surface thereof, and a step of preparing a label base material on the surface of the label base material on the side of the thermosensitive color former layer. , A step of printing / coating with an oxidative polymerization type ink to form a printing layer, a step of preparing a polymer sheet having a release agent layer formed on the surface thereof, and a step of printing the release agent layer of the polymer sheet on a label substrate. And a step of polymerizing a polymerized sheet on a label substrate so as to be bonded to the surface of the layer.

The method for producing a continuous body of a thermosensitive color developing label according to claim 5 comprises a step of preparing a label substrate having a thermosensitive color former layer formed on the surface thereof, and a step of preparing a label base material on the surface on the thermosensitive color former layer side. The step of printing / coating with an oxidative polymerization type ink to form a printing layer, the step of preparing a polymer sheet having a release agent layer formed on the surface thereof, and the release agent layer of the polymer sheet being the print layer of the label substrate. Prepare a process paper in which the polymerized sheet is polymerized on the label substrate so as to be bonded to the surface, and a process paper in which a release layer is formed, in which an adhesive is printed / coated on the surface of the release layer. And the surface of the label base material opposite to the surface on which the thermosensitive color former layer is formed, the pressure-sensitive adhesive layer surface of the process paper is superposed, and the pressure-sensitive adhesive layer of the process paper is transferred to the label base material. After that, only the process paper is peeled from the surface of the adhesive layer of the label substrate, leaving only the adhesive layer And a step to leave the back surface of the bell substrate, a manufacturing method of a continuum of thermosensitive coloring label.

The method for producing a continuous body of a thermosensitive color-developing label according to claim 6, wherein the polymer sheet has a release agent layer made of a silicone resin formed on the surface of the sheet material. This is a method for producing a continuous body of colored labels.

[0011]

[0012]

[0013]

According to the inventions of claims 1 and 2, compared with the case where the printing layer is formed by using the ultraviolet curable ink,
The gloss is sufficient, the printability is good, and the printing layer having a mirror surface can be formed without carelessly developing the color of the thermosensitive color developing agent layer.

According to the invention of claim 3, the pressure-sensitive adhesive layer formed on the back surface of the label base material allows the label base material to be easily adhered to the adherend.

According to the fourth and fifth aspects of the invention, the polymerized sheet is formed so that the release agent layer of the polymerized sheet is bonded to the print layer surface formed by printing / coating with the oxidative polymerization type ink of the label substrate. By the process of polymerizing on the label substrate, the printing layer formed by the oxidation polymerization type ink becomes a mirror surface, and moreover,
It is possible to form a print layer having sufficient gloss and good printability.

According to the invention of claim 5, since the pressure-sensitive adhesive layer is formed by transferring to the back surface of the label substrate, the pressure-sensitive adhesive layer can be formed on the surface of the label substrate at room temperature. Therefore, when selecting a label base material, it is possible to select an ultra-thin tape that has relatively low heat resistance, and before forming the pressure-sensitive adhesive layer, the pressure-sensitive adhesive in the original emulsion state Since the solvent and the like are removed before the transfer, the range of pressure-sensitive adhesives that form the pressure-sensitive adhesive layer can be widened without being influenced by the properties of the label substrate. Further, it does not adversely affect the thermosensitive coloring layer of the label substrate.

According to the sixth aspect of the invention, the printed layer formed of the oxidative polymerization type ink of the label base material can be made to be a mirror surface by the release agent layer of the silicone resin of the polymerization sheet.

[0018]

[0019]

1 and 2 are views showing a continuous body of a thermosensitive coloring label according to the present invention, FIG. 1 is a perspective view thereof, and FIG. 2 is a sectional view thereof. Figure 3
It is an illustration figure which shows an example of the manufacturing method of the illustration example of FIG.

The label continuum 10 of the example shown in FIG. 1 is formed by continuously forming a plurality of labels 12 in a strip shape, and each label 12 is cut at the boundary thereof and used as one label 12. It is what is done.

Then, the label 12 is transferred to the back surface of the long label base material 14 to form the adhesive layer 16, and the thermosensitive color developing agent layer 18 is formed on the front surface side of the label base material 14. The print layer 20 is formed on a part of the surface of the label base material 14 on the thermosensitive color developing agent layer 18 side of the label base material 14. The print layer 20 is formed intermittently at regular intervals so as to form the display portion of each label 12 across the boundary of each label 12.
Is formed by printing / coating an appropriate image with an oxidation polymerization type ink. As the oxidative polymerization type ink, for example, one containing carbon black, dark blue, alkali blue toner (paste), alkyd resin varnish, linseed oil varnish, compound, petroleum solvent, cobalt drier is used. Further, on the surface of the label base material 14 on the printing layer 20 side, the superposed sheet 22 is formed so as to be bonded to the printing layer 20 side.
The release agent layer 24 is polymerized.

The label continuum 10 is, as shown in FIG.
Before being used as a single label, the polymerized sheet 22
The label substrate 14 is wound in a roll so that the release agent layer 24 side and the pressure sensitive adhesive layer 16 side face each other and are polymerized. In this illustrated example, the release agent layer 24 is formed on both surfaces of the polymerized sheet 22.

In the example shown in FIG. 1, the long label substrate 14 is, for example, a plastic film or sheet of paper, synthetic paper, cellophane, polystyrene, polyester or the like, or a long strip of aluminum foil or the like. However, in order to cut the continuous strip-shaped label base material 14 into units of each label 12, it is necessary to use a material that can be cut by hand or by a mechanical device such as a cutter. In addition, perforations (not shown) such as perforations are formed at predetermined intervals, and the label 12 of a predetermined strip is formed.
It may be configured so that it can be cut.

The pressure-sensitive adhesive layer 16 formed by transferring to the back surface of the label base material 14 is for giving an adhesive force to each label 12, and is a known adhesive such as an acrylic copolymer resin or a rubber adhesive. A pressure sensitive adhesive is used.

The thermosensitive coloring layer 18 formed on the surface side of the label substrate 14 is formed by applying and drying a thermosensitive coloring agent containing a mixture of a transparent or monochromatic leuco dye, an acidic substance and a binder. It In this case, examples of the leuco dye include crisital violet lactone, 3-indolino-3-P-dimethylaminophenyl-6-dimethylaminophthalide, 3-diethylamino-7-chlorofluorane, and 2-diethylamino-7.
-Cyclohexylaminofluorane, 3-diethylamino-5-methyl-7-t-butylfluorane, 3-diethylamino-6-methyl-7-anilinofluorane, 3
-Diethylamino-6-methyl-7-P-butylanilinofluorane and the like.

As the acidic substance, for example, 2,
2-bis (4'-oxyphenyl) propane, 4-phenylphenol, 4-hydroxyacetophenone, 2,
2'-dihydroxydiphenyl, 2,2'-methylenebis (4-methyl-6-t-butylphenol), 4,
4'isopropylidenediphenol, 4,4'-isopropylidene bis (2-chlorophenol), 4,4'-
Isopropylidene bis (2-methylphenol), 4,
4'-ethylenebis (2-methylphenol), 4,
4'-thiobis (6-t-butyl-3-methylphenol) and the like can be mentioned.

Further, as the binder, for example, polyvinyl alcohol, methoxy cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, polyacrylamide, polyacrylic acid, starch, gelatin,
Examples thereof include water-soluble or aqueous emulsions of polystyrene, vinyl chloride-vinyl acetate copolymer and the like. The thermosensitive coloring layer 18 can be colored by heating it with a thermal head or the like of a printer.

On the surface of the label base material 14 on the thermosensitive coloring layer 18 side, there is further formed a printing layer 20 which forms a display portion of each label 12 with a boundary between each label 12 being separated. The printing layer 20 is formed by printing using an oxidative polymerization type ink by a known printing method such as planographic printing, letterpress printing or offset printing. The release agent layer 24 of the polymerized sheet 22 polymerized on the surface side of the label base material 14, that is, the surfaces of the thermosensitive coloring layer 18 and the printing layer 20 is formed by printing and applying a release agent containing, for example, a silicone resin. It is a thing.

In the illustrated example, the release agent constituting the release agent layer 24 is an ultraviolet ray or an electron beam such as UV silicon (so-called ultraviolet curing type silicon) or EB silicon (so-called electron beam curing type silicon). It is good to choose the one that is cured in.

Next, an example of the manufacturing method shown in FIG. 1 will be described mainly with reference to FIG.

First, a long strip-shaped process sheet 30 made of paper, film, sheet-shaped plastic or the like is rolled up and prepared. This process sheet 3
0 is used only in the manufacturing process and does not remain in the completed label continuum 10. The surface of the process sheet 30 is provided with a release layer 32 having release properties, which is formed by printing and applying a release agent such as silicone resin or fluorine resin.

Next, the pressure-sensitive adhesive 34 for forming the pressure-sensitive adhesive layer 16 is printed and applied on the surface of the release layer 32 of the process sheet 30, and the pressure-sensitive adhesive application device 36 has two rollers 36a and 36b. including. The lower part of the roller 36a is immersed in the adhesive 34 stored in the pan. Therefore, by rotating the rollers 36a and 36b, the release layer 3 of the process sheet 30 guided to the portion is rotated.
The adhesive 34 is printed and applied to the surface 2. As the adhesive coating device, a coating device such as a gravure roll coater, a reverse roll coater, an air knife coater or the like may be used, or a known printing machine such as a screen printing machine may be used.

The process sheet 30 to which the adhesive 34 is applied by printing is, for example, a dryer 38 including a heater.
Be led to. In the dryer 38, the adhesive 34 printed and applied on the process sheet 30 is dried to form the adhesive layer 16. As the adhesive 34, an adhesive containing water-soluble resin such as EVA, vinyl acetate, acrylic, or vinyl chloride,
When a solvent-based adhesive made of urethane, acrylic, etc. is used, a dryer is used as the dryer 38, and a rubber type, EV
When the A-type hot melt adhesive is used, a cooler is used as the dryer 38.

On the release layer 32 side of the process sheet 30 on which the pressure-sensitive adhesive layer 16 is formed as described above, the base paper 14a to be the label base material 14 is laminated. Base paper 14a of the label base material 14
Is formed in the same width as the process sheet 30, and the thermosensitive color former layer 1 is already formed on the surface of the base paper 14a of the label base material 14.
8 is formed. The heat-sensitive color former layer 18 is formed on the side opposite to the side of the pressure-sensitive adhesive layer 16 described above.

In this way, the process sheet 30 and the adhesive 34
The layered product in which the above layer and the label base material 14 are laminated has a width that is approximately similar to the width of the label continuous body 10 that is the final product in advance in a laminated state before being guided to the next process such as printing. It is slit by a slitter (not shown).

That is, the laminated sheet 40 in which the process sheet 30 and the continuous body of the label base material 14 are laminated with the pressure-sensitive adhesive layer 16 and temporarily adhered to form the printing layer 20 as shown in FIG. It is guided to the printing device 42. This printing device 4
Reference numeral 2 is for printing the display portion that constitutes each label 12, and for example, an image line composed of characters such as a trade name and an appropriate pattern is known by lithographic printing, letterpress printing, offset printing or the like with an oxidation polymerization type ink. The printing device is used for printing.

Then, the laminate 4 on which the printing layer 20 is formed
0 is led to the polymerization sheet polymerization device 44. Next, in the polymerization sheet polymerization device 44, the release agent layer 2 of the polymerization sheet 22 is
The polymerization sheet 22 is polymerized with the laminate 40 such that one of the four surfaces of the release agent layer 24 is bonded to the surface of the printing layer 20. Then, the label continuum 10 in which the superposed sheet 22 and the laminate 40 are laminated is next guided to the process sheet removing device 46. The process sheet removing device 46 includes the roller 4
8 and the process sheet 30 is peeled from the surface of the pressure-sensitive adhesive layer 16 of the laminate 40, and is wound into a roll so that it can be reused separately. That is, the adhesive layer 16 transferred to the back surface of the label substrate 14 on the release layer 32 surface of the process sheet 30.
Separated from the surface, only the process sheet 30 is peeled off and wound into a roll, and the label base material 14 polymerizes the release agent layer 24 side of the polymerized sheet 22 on the surface of the print layer 20 of the label 12 together with the polymerized sheet 22. It is rolled up in a rolled state.

On the other hand, the laminate constituting the label continuum 10 is rolled while cutting both side edges or one side edge with a slitter (not shown) so that the width of the label continuum 10 is further optimized. It is rolled up in a shape.

[0039]

[Brief description of drawings]

FIG. 1 is a perspective view of a continuous body of a thermosensitive coloring label according to the present invention.

FIG. 2 is a sectional view of the example shown in FIG.

FIG. 3 is an illustrative view showing one example of the manufacturing method of the example shown in FIG.

[Explanation of symbols]

10 Label continuum 12 labels 14 Label substrate 14a Base paper 16 Adhesive layer 18 Thermosensitive color developer layer 20 printing layers 22 Polymerized sheet 24 Release agent layer 30 process sheet 32 Release layer 34 Adhesive 36 Adhesive coating device 38 Dryer 40 laminate 42 Printing device 44 Polymerization sheet polymerization equipment 46 process sheet removing device

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) G09F 3/02 G09F 3/10 B29D 9/00 B32B 1/00-35/00 C09J ⁷ /00-7/04 D21B 1 / 00-1/38 D21C 1/00-11/14 D21D 1/00-5/28 D21F 1/00-13/12 D21G 1/00-9/00 D21H 1/00-27/42 D21J 1/00 -7/00

Claims (6)

(57) [Claims] 1. A thermosensitive color former layer is formed on the surface of a label substrate, and a printing layer formed by printing / coating with an oxidation polymerization type ink is formed on the surface of the thermosensitive color former layer side. A continuous body of heat-sensitive color-developing label, wherein a polymerized sheet is polymerized on a label substrate so that the release agent layer surface is bonded to the printing layer surface. 2. The continuous body of the thermosensitive color-developing label according to claim 1, wherein the release agent layer of the polymerized sheet is printed and coated with a release agent containing a silicone resin. 3. The continuous body of the heat-sensitive color-developing label according to claim 1, wherein an adhesive layer is formed on the back surface of the label base material. 4. A heat-sensitive color former layer is formed on the surface of the layer,
A step of preparing a label base material, a step of printing / coating with a oxidative polymerization type ink on the surface of the label base material on the side of the heat-sensitive color former to form a print layer, and a release agent layer is formed on the surface. And a step of polymerizing the polymer sheet on the label base material so that the release agent layer of the polymerized sheet is bonded to the printed layer surface of the label base material. How to make a continuous label. 5. A thermosensitive color developing agent layer is formed on the surface of the thermosensitive coloring agent layer,
A step of preparing a label base material, a step of forming a printing layer by printing / coating with a oxidative polymerization type ink on the surface of the label base material on the side of the thermosensitive color developing agent layer, and a release agent layer is formed on the surface. A step of preparing the polymerized sheet, a step of polymerizing the polymerized sheet on the label substrate so that the release agent layer of the polymerized sheet is bonded to the surface of the printing layer of the label substrate, and a release layer is formed. And a step of preparing a step paper in which an adhesive is printed / coated on the surface of the release layer, and a surface opposite to the surface of the label base material on which the thermosensitive coloring agent layer is formed. , The pressure-sensitive adhesive layer surface of the process paper is overlaid, and after transferring the pressure-sensitive adhesive layer of the process paper to the label substrate, only the process paper is peeled off from the pressure-sensitive adhesive layer surface of the label substrate, Of the heat-sensitive color-developing label including Method of connection body. 6. The method for producing a continuous body of a thermosensitive color-developing label according to claim 4, wherein the polymer sheet has a release agent layer made of a silicone resin formed on a surface of a sheet material.