JP2000284694A - Board-free label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the sticking of a pressure sensitive adhesive to a cutting tool in cutting by disposing a coating layer containing a releasing agent on each cutting part of a substrate. SOLUTION: A detection mark 8 is a coating layer disposed on the rear side of thermal paper 2 and the coating layer is preferably formed by printing with a black ink because discrimination between total reflection (white) and total absorption (black) is facilitated in detection with an optical sensor and printing can visually be judged whether it is good or bad. A UV-curing ink is preferably used as the black ink because it does not use a harmful organic solvent, can be cured with a little energy in a short time and can form a coating film in such a way that a liquid releasing agent 9 is not separated. The liquid releasing agent 9 is previously kneaded in the UV-curing ink and dispersed as invisible fine particles. After curing, the releasing agent 9 is sealed in the coating film. Any material capable of forming a chemically inert film less liable to a change in viscosity and having high water repellency may be used as the releasing agent 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label without a backing sheet, which is used by cutting a long strip-shaped aggregate wound into a roll into small pieces with a blade.

[0002]

2. Description of the Related Art A label without a backing is formed by winding a long strip-shaped substrate having a release agent layer on one side and a pressure-sensitive adhesive layer on the other side in a roll shape. In addition, since the pressure-sensitive adhesive layer of the base material on the outer peripheral side overlaps the release agent layer of the base material on the inner peripheral side, a structure in which a mount (separator) is not required is provided. In order to print and use the label without a mount, a dedicated label printer equipped with a cutter device is often used.

That is, since the label without the backing sheet immediately after printing inside the printer is a continuous body such as an adhesive tape, it must be cut off from the end and made into a small piece in order to use it as one piece of glued label. .

[0004]

However, in the above-mentioned label without a backing sheet of the prior art, the pressure-sensitive adhesive provided on one side of the base material easily adheres to the blade when cutting, and when a dedicated printer is used, the label is continuously used. During this operation, there is a problem that the pressure-sensitive adhesive adheres to the cutter blade to make the sharpness dull, and a label that has been cut once adheres to the cutter blade and causes paper jam.

In order to prevent this problem, a method may be considered in which a pressure-sensitive adhesive layer is not provided at the cut portion of the base material, but a special coater is required or the production speed is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a label without a backing sheet which can prevent a pressure-sensitive adhesive from adhering to a blade when cutting. It is in.

[0007]

The feature of the present invention for solving the above-mentioned problem is that a coating layer containing a release agent is provided at a cut portion of the substrate.

Here, it is preferable to use a silicone polymer compound as the release agent.

Preferably, the coating layer is formed using an ultraviolet-curable resin.

Further, the content of the release agent is 0.1 to 10 parts by weight based on 100 parts by weight of the material constituting the coating layer.
The content is preferably 0 parts by weight or less.

The coating layer is preferably formed using an optically detectable ink.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. In the figure, reference numeral 1 denotes a label without a mount according to the first embodiment,
Is a thermal paper 2 as a base material and a release agent layer 11 described later,
The thermal paper 2 is generally constituted by a pressure-sensitive adhesive layer 12.
Also has a multi-layer structure in which a heat-sensitive agent layer 6 described later and the like are coated in multiple layers on a paper material 3 serving as a main body.

Reference numeral 4 denotes an undercoat (anchor) layer formed on the front side of the paper material 3, and reference numeral 5 denotes a backcoat layer formed on the back side thereof. It is provided for the purpose of improving the adhesion of the layer 6 and preventing the ink forming the detection mark 8 from seeping or bleeding.

Reference numeral 6 denotes a heat-sensitive agent layer which develops a color by heating. The heat-sensitive agent layer 6 is a layer in which only a portion to which heat is applied from a thermal head provided in a printer is colored to represent a character or a pattern. Overcoat 7 to prevent color development
Protected by

Reference numeral 8 denotes a detection mark as a coating layer provided on the back side surface of the thermal paper 2. The detection mark 8 is an optical sensor provided in the printer for detecting the position of a label without a backing sheet as a continuous body. Mark (timing mark) for printing with a thermal head or cutting with a cutter device
It is used as

Here, since the detection mark 8 is detected by an optical sensor, it is easy to distinguish between total reflection (white) and total absorption (black).
It is preferable to print a black ink to form a coating layer since the quality of printing can be visually checked.

Oxidation polymerization type and heat polymerization type inks can be used as the ink, but can be cured in a short time with little energy without using harmful organic solvents. It is preferable to use an ultraviolet-curable ink (UV ink) because a coating film can be formed so as not to be separated.

Reference numeral 9 denotes a liquid release agent contained in the coating film of the detection mark 8. The release agent 9 is kneaded in advance into the UV ink to form invisible small particles (for convenience, FIG. 2 are shown in the drawing) and are dispersed in the ink, and are sealed in the coating film even after the ink is cured. As this release agent, mineral oil or vegetable oil can be used as long as it is a substance that is chemically inert, has a small change in viscosity, and can form a highly water-repellent film. Silicone polymer compounds that are oily in terms of surface are preferably used, and in particular, a substance generally referred to as silicone oil that has few functional groups that react with components in the ink is preferable. Fine particles such as silicone can also be used.

The content of the release agent is based on 100 parts by weight (before curing) of the ink constituting the detection mark 8 (coating layer).
It is necessary to be in a range of 0.1 part by weight or more and 100 parts by weight or less. If the amount is less than 0.1 part by weight, no effect is obtained even if the amount is more than 100 parts by weight. If the amount is more than 100 parts by weight, there is a problem that the cured product of the ink is softened, the release agent is separated and sticky, and the base material is stained.

From the viewpoint of the amount added and the effect obtained, the preferred range is 0.5 parts by weight or more and 50 parts by weight or less. The present inventors have obtained good results by blending 5 parts by weight of silicone oil with 100 parts by weight of UV ink.

Reference numeral 10 denotes a general print such as a frame, a design, and a company name provided on the overcoat 7 of the thermal paper 2, 11 denotes a release agent layer made of wax or the like formed thereon, and 12 denotes a back side of the thermal paper 2. 1 shows a pressure-sensitive adhesive layer provided on a surface, and a label 1 without a backing made of the above is a pressure-sensitive adhesive layer 1
2 is wound inside so as to be mounted on a dedicated label printer 13 without a backing paper shown in FIG. The label printer 13 includes a holder 14, a guide roller 15, an optical sensor 16, a thermal head 17, a platen roller 18,
It comprises a cutter device 19 and a feed roller 20, and each of the rollers 15, 18, 20 is subjected to a release treatment so that the pressure-sensitive adhesive of the label 1 without the backing paper does not adhere thereto.

Label 1 without backing sheet mounted on holder 14
The leading end is drawn out, guided to each guide roller 15, between the thermal head 17 and the platen roller 18, and between the feed rollers 20 via the cutter device 19, and discharged from the discharge port 21 of the printer 13.

At this time, the reflection type optical sensor 16 detects the detection mark 8 under the label 1 without the backing paper, judges that the space between the detection marks 8 is one label piece, and determines that the thermal head 1
7 and the cutting position by the cutter device 19 are controlled.

Here, as shown in FIG. 1, in this embodiment, the cutting position is on the detection mark 8 on the back surface of the label 1. The detection marks 8 are provided between the printing areas 30a, 30b, 30c, 30d,.

Thus, the printing for optical detection and the coating layer for replenishing the cutter blade with a releasing agent can be used at the same time, and the productivity of the label without mount is improved. Then, every time the label 1 without the backing paper is cut by the cutter device 19, the liquid release agent oozes out of the ink forming the detection mark 8 and coats the surface of the cutter blade. Is prevented and the sharpness can always be kept in the best condition.

In this embodiment, since the UV ink is used to print the detection mark 8, it can be cured in a short time without a heating or drying step, and can be coated with silicone oil as a release agent. It can be effectively confined in the film.

Since silicone oil is used as the release agent, a highly water-repellent film can be formed on the cutter blade, thereby maintaining sharpness, preventing paper jams, and extending the cleaning period of the cutter blade. In addition, lubrication and rust prevention effects can be obtained.

In the above embodiment, the coating layer containing the liquid release agent is described as also serving as the detection mark. However, the present invention is not limited to this, and the cutting position is determined separately from the detection mark. A coating layer containing a release agent may be provided at that position.

Although the coating layer containing the release agent has been described as an ink containing pigments and dyes, the invention is not limited to this, and a transparent varnish may be used.

Although the case where paper-based thermal paper is used as the base material has been exemplified, a synthetic paper-based thermal paper may be used. In this case, the coating layers provided on both sides of the paper and the components thereof are changed. , May be omitted.

Further, in the above-described embodiment, a thermal paper type weighing label has been exemplified. However, instead of this, a label without a mount for printing with a thermal transfer type printer or a label without a mount for an automatic sticking device without printing from the printer are used. It may be applied to a seal.

Further, the coating layer has been described as being provided on the back side of the substrate, but may be provided on the front side.

[0033]

As described in detail above, according to the present invention,
By providing a coating layer containing a release agent at the cutting site of the base material, the release agent contained in the coating layer of the cutting site is coated on the cutting edge each time the label without a mount is cut with a blade, The adhesion of the pressure-sensitive adhesive can be prevented to keep the sharpness always in the best condition, and when used in a printer equipped with a cutting device, the cleaning cycle can be lengthened.

Here, if a silicone polymer compound is used as a release agent, the cutting edge is coated with a highly water-repellent film, so that the adhesion of the pressure-sensitive adhesive can be effectively prevented, and the lubricating effect and the rust-preventing effect are also obtained. can get.

Further, when the coating layer is formed using an ultraviolet curable resin, even if the release agent is a liquid substance, it can be effectively sealed in the coating layer.

When the coating layer is formed using an ink that can be optically detected, the coating layer can have various effects, such as a function of a detection mark when printing with a printer. .

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a label without a backing sheet according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken in the direction of arrows II-II in FIG.

FIG. 3 is an explanatory diagram of a label printer that uses a label without a mount.

[Explanation of symbols]

 1 Label without mount 2 Thermal paper (base material) 8 Detection mark (coating layer) 9 Silicone oil (release agent) 11 Release agent layer 12 Pressure sensitive adhesive layer

Claims (5)

[Claims] In a label without a backing sheet used by cutting a strip-shaped base material provided with a release agent layer on one surface and a pressure-sensitive adhesive layer on the other surface, a separation portion of the base material is provided. A label without a backing, comprising a coating layer containing a mold agent. 2. The label without a backing sheet according to claim 1, wherein the release agent is a silicone polymer compound. 3. The label without a backing sheet according to claim 1, wherein the coating layer is made of an ultraviolet curable resin. 4. The label without a backing sheet according to claim 1, wherein the content of the release agent is 0.1 to 100 parts by weight based on 100 parts by weight of the material constituting the coating layer. 5. The label according to claim 1, wherein the coating layer is made of an optically detectable ink.