JP5980482B2 - Label processing method - Google Patents

Description

  The present invention relates to a label processing method, and more particularly, to a processing method for easily obtaining a label having a complicated shape with a high yield.

  As shown in FIG. 8, an adhesive paper used for a seal or label product (hereinafter referred to as a label) is obtained by laminating a label base material 5, an adhesive layer 6 and a separator 7 in this order. The pressure-sensitive adhesive paper 2 is coated with a liquid pressure-sensitive adhesive on the side of the release agent layer of the separator 7 provided with a release agent layer on one side, the moisture or solvent of the pressure-sensitive adhesive is evaporated, and then the dried pressure-sensitive adhesive layer 6 is labeled. The base material 5 is bonded together. In addition, the adhesive may be directly applied to the label substrate 5 and then bonded to the separator 7 after drying. The adhesive paper 2 produced through such a process is slit to a predetermined width to become an adhesive base paper roll 12.

  The adhesive base paper roll 12 slit to a predetermined width is subjected to label processing by a printing machine (label processing apparatus) 21 as shown in FIG. FIG. 6 is a schematic side view of a relief printing press as an example of a label processing apparatus.

  Outline of processing by the label processing apparatus 21 in FIG. 6 is that an adhesive base paper roll 12 in which a belt-like adhesive paper 2 is wound in a roll shape is attached to the supply shaft 11 of the unwinding unit 10, and the adhesive paper 2 is wound from the supply shaft 11. Is issued. The adhesive paper 2 is guided to the first front surface printing step 40 by being guided by the guide roller 22, and subsequently guided to the guide rollers 23 and 24 to reach the back surface printing step 70 through the second front surface printing step 60. In the first surface printing process 40 and the second surface printing process 60, characters and designs are mainly printed. Further, in the back surface printing process 70, timing marks are often printed.

  In the first front surface printing step 40, the second front surface printing step 60 and the back surface printing step 70, reference numerals 41, 61 and 71 are printing units, reference numerals 42, 62 and 72 are plate cylinders, reference numerals 43, 63 and 73 are pressure units. The barrels, reference numerals 44, 64, and 74 indicate UV curing devices.

  Subsequently, the printed adhesive paper 2 is guided to the guide roller 25 and proceeds to the die cutting step 80, and is half-cut into a desired label size and shape by the die roll 81 and the anvil roll 82, and then is removed by the scrap removing roll 83. Unnecessary portions around the half-cut (hereinafter referred to as label residue 9) are peeled off (see FIG. 7).

  When the label residue 9 is peeled off, the adhesive paper 2 becomes a continuous label body 30 in which the labels 14 are arranged at regular intervals on the separator 7. Next, the label continuum 30 is wound around the winding shaft 91 of the winding portion 90 through the guide roller 26 and becomes a label roll 92. The label residue 9 is wound around the winding shaft 96 of the residue winding portion 95. The above-described label processing apparatus 21 and processing method are general, and are widely used as methods for efficiently producing labels.

  Many of the labels have a simple shape such as a quadrangle or a circle. However, a label 4 having a complicated shape as shown in FIG. Examples include labels that decorate confectionery packaging and labels that are placed on pudding and jelly containers. These require high decorativeness and often have complicated contours. For example, in the case of a pudding container, it is pasted in a U-shape (a shape obtained by rotating the U-character 90 degrees counterclockwise) from the side of the container to the opposite side across the lid. In this case, the label 4 has an elongated shape in which the ratio between the short side and the long side is extremely different, but the label roll 92 is wound with the short side of the label 4 and the transport direction of the label continuous body 30 parallel to each other. There are many cases. This is for winding a large number of labels per one roll of label roll and for enabling an affixing operation using an automatic affixing machine.

  When the elongated label 4 shown in FIGS. 4 and 5 is processed with its short side parallel to the longitudinal direction of the label continuum 30, the width direction label scrap 9 a corresponding to the portion sandwiched between the labels 4 at the front and rear of the label scrap 9 is It becomes a thin string. In the residue raising operation, the continuous label residue 9b on both edges of the adhesive paper 2 is pulled and peeled off, and the width-direction label residue 9a between the labels 4 is peeled off through this.

  When the label 14 has a simple rectangular shape as shown in FIG. 7, the width direction label residue 9 a between the labels 14 is uniform over the entire width, and the label residue continuous portion on both edges of the adhesive paper 2. It can peel by peeling 9b. However, when the label 4 shown in FIGS. 4 and 5 is long and complicated in outline, the width direction label residue 9a has a shape in which a thin portion 9c and a thick portion 9d are mixed. When the thickness of the width direction label residue 9a is not uniform, the peeling resistance at the time of peeling from the separator 7 is not constant, and the residue raising becomes unstable. In the residue raising operation, the force concentrates on the boundary portion 9e between the thin portion 9c and the thick portion 9d, and the label residue 9 is easily cut.

  If the label residue 9 is cut during the label processing, the label residue 9 remains on the separator 7 without being removed, causing a so-called defective residue. In addition, when the label residue 9 once peeled off, the cut end of the label residue 9 from which the adhesive has been exposed falls on the surface of the label 4 and is attached to the label roll 92 in a state where it adheres. . When the label scrap 9 is cut, it is necessary to stop the processing device 21 each time and peel off the label scrap 9 manually or connect the cut label scrap 9 to the scrap winding portion 95 to restore the processing device. It takes time and effort. The time loss and cost impact will be significant.

  As a countermeasure, there is a method in which the width of the label 4a in the width direction is increased by widening the front-rear interval of the label 4 to make it difficult to cut. However, the area of the adhesive paper 2 necessary for obtaining one label increases, resources are wasted and cost increases are unavoidable.

  There is also a measure for processing the long side and the short side of the label 4 so that the long side is parallel to the longitudinal direction. However, the label roll produced as described above has a smaller number of windings per roll than a wide label roll wound around the same outer diameter. When sticking, since it takes time to unwind one label, the sticking ability per unit time becomes insufficient.

JP 2002-355907 A

  The present invention has been made to solve the above-described problems. When processing a label having a complicated shape, the label residue, which is an unnecessary portion around the label, is easily and reliably removed, and the label is processed efficiently and with a high yield. It aims at providing the label processing method which can be performed.

The label processing method of the present invention made to achieve the above object is a long strip-like pressure-sensitive adhesive paper, which is made up of a pressure-sensitive adhesive paper body and a separator made of a label base material and a pressure-sensitive adhesive layer, and is wound into a roll. An unwinding step, a printing step for printing on the label base material, a separation step for separating the adhesive paper into an adhesive paper body and a separator, and a part of the surface of the adhesive layer of the separated adhesive paper body. Adhesive strength reducing step for forming a non-adhesive part by forming an adhesive coating layer, a bonding step for re-adhering the adhesive paper body provided with the non-adhesive part and the separator, and half-cutting the adhesive paper A die-cutting process that defines the label of the label, and a dregs raising process that removes unnecessary portions around the label. In the adhesive pressure-reducing step, the coating layer is formed around the label that is planned to become an unnecessary portion through the die-cutting step. Less It is characterized by forming a part also.
It is desirable that the non-adhesive portion is provided at least in a portion sandwiched between labels among the periphery of the label that is to become an unnecessary portion by half-cutting.

According to the label processing method of the present invention, the adhesiveness is reduced by forming a non-adhesive coating layer on at least a part of the surface of the pressure-sensitive adhesive layer of the portion around the label that is to become the label residue, It is half-cut and raised. Therefore, the peeling resistance when peeling the label residue from the separator is reduced, and the residue raising operation can be performed smoothly. The risk of cutting the label residue is reduced, and the label processing speed can be increased.
In addition, even when the label outline is complex and the thickness of the label residue is not constant, the difference between the peeling resistance of the thick portion of the label residue and the separation resistance of the thin portion is reduced, and the force concentrates on the portion where the thickness of the label residue changes. Phenomenon is avoided and smooth scrap raising work is possible.

The schematic side view showing the label processing apparatus used for the processing method of the label of this invention. It is a figure explaining the processing method of the label of this invention, and is a top view which shows the state which printed on the adhesive paper. It is a figure explaining the processing method of the label of this invention, and is a top view which shows the state which formed the coating layer on the surface of an adhesive layer. It is a figure explaining the processing method of the label of this invention, and is a top view which shows the state which gave the half cut to the adhesive paper The top view of the label continuous body obtained with the processing method of the label of this invention. The schematic side view showing the conventional label processing apparatus. The schematic perspective view explaining the dregs raising of a label continuum. The top view and sectional drawing showing a general label continuous body.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view of a relief printing press as an example of a label processing apparatus 20 used in the label processing method of the present invention.

  The main parts of the label processing apparatus 20 are the unwinding unit 10, the first surface printing process 40, the separating unit 31, the adhesive strength reducing process 50, the confirmation area 55, the bonding unit 35, and the second in the sheet passing path order. The front surface printing process 60, the back surface printing process 70, the die cutting process 80, and the winding part 90 are arrange | positioned.

  The unwinding unit 10 can unwind the adhesive base paper roll 12 in which the adhesive paper 2 (see FIG. 8) in which the label base material 5, the adhesive layer 6, and the separator 7 are laminated in this order on the supply shaft 11 is wound in a roll shape. Pivot. A first surface printing process 40 is provided downstream of the unwinding unit 10.

  The first surface printing step 40 is composed of a printing unit 41 mainly composed of a plate cylinder 42, an impression cylinder 43, and the like, and a UV curing device 44 provided downstream thereof, and the plate cylinder 42 and the impression cylinder 43 are adhered to each other. In this mechanism, the paper 2 is sandwiched and conveyed, and ultraviolet curable ink (ink that is instantly cured by irradiation of ultraviolet rays) is supplied to the plate cylinder 42 to perform printing on the adhesive paper 2. Then, printing is performed on the label substrate 5 side of the adhesive paper 2 by curing the ink printed by irradiating ultraviolet rays from the UV curing device 44 (see FIG. 2).

  A counter roller 31 is provided downstream of the first surface printing step 40 as separating means for separating the adhesive paper 2 into the adhesive paper main body 3 (label substrate 5 and adhesive layer 6) and separator 7.

  Here, the adhesive paper main body 3 and the separator 7 separated from the adhesive paper 2 will be described first along the paper passing path of the adhesive paper main body 3.

  An adhesive force reducing step 50 is provided downstream of the counter roller 31. The adhesive force reducing step 50 includes a printing unit 51 mainly composed of a plate cylinder 52 and an impression cylinder 53, and a UV curing device 54 provided downstream thereof. The pressure-sensitive adhesive paper body 3 from which the pressure-sensitive adhesive layer 6 is exposed is sandwiched between the plate cylinder 52 and the pressure cylinder 53 and conveyed, and non-adhesive ultraviolet curable ink or varnish is supplied to the plate cylinder 52 to provide the pressure-sensitive adhesive layer 6. This is a mechanism for printing on the surface of the paper. Then, when the ink or varnish printed on the pressure-sensitive adhesive layer 6 is cured by irradiating ultraviolet rays from the UV curing device 54, the non-adhesive coating layer 8 is formed on a part of the surface of the pressure-sensitive adhesive layer 6, and the coated portion Becomes a non-adhesive part (see FIG. 3).

  The material of the coating layer 8 printed in the adhesive force reducing step 50 is ultraviolet curable ink or varnish. An ultraviolet curable medium ink is suitable.

  A confirmation area 55 is provided downstream of the adhesion reducing step 50. In the confirmation area 55, the coating layer 8 is registered using the marker 46 (cross mark or the like) printed in the first surface printing step 40.

  A nip roll 35 is provided downstream of the confirmation area 55 as a bonding means for bonding the adhesive paper main body 3 and the separator 7 again.

  On the other hand, after the separator 7 is separated from the adhesive paper main body 3 by the counter roller 31, the separator 7 passes through the bypass path in the order of the guide roller 33 and the guide roller 34 through the accumulator 32, reaches the nip roll 35, and reaches the nip roll 35. It is pasted again.

  A second front surface printing step 60 and a rear surface printing step 70 are sequentially arranged downstream of the nip roll 35. The second surface printing step 60 includes a printing unit 61 mainly composed of a plate cylinder 62, an impression cylinder 63, and the like, and a UV curing device 64 provided downstream thereof. The back surface printing step 70 includes a printing unit 71 mainly composed of a plate cylinder 72, an impression cylinder 73, and the like, and a UV curing device 74 provided downstream thereof. Since the individual functions are the same as those in the first front surface printing step 40, detailed description is omitted. A die cutting process 80 is disposed downstream of the back surface printing process 70.

  The die cutting step 80 is a step of performing a half cut from the label base material 5 side of the adhesive paper 2 to the adhesive layer 6. It comprises a roll with a blade called a die roll 81 and an anvil roll 82. The adhesive paper 2 is sandwiched between them, and the die roll 81 is pressed against the label substrate 5 and rotated to perform half cut.

  A pair of residue-removing rolls 83 and 84 for separating the surrounding label residue 9 from the half-cut adhesive paper 2 is disposed downstream of the die roll. After the separation, the adhesive paper 2 goes to the winding unit 90 as the label continuous body 30 and is wound around the winding shaft 91 to become a label roll 92. The label residue 9 goes to the residue take-up portion 95 and is taken up by the take-up shaft 96.

  Then, the label processing method using the label processing apparatus 20 of FIG. 1 is demonstrated. Here, an example in which the irregular label 4 shown in FIGS. 2 to 5 is processed will be described. This label 4 has a strip shape in which the length in the width direction (long side) is longer than the length in the transfer direction (short side), the length in the transfer direction is not constant, and has a complicated contour that is swelled in some places. doing. Accordingly, the thickness of the label residue between the label 4 and the subsequent label 4 is not constant, and a thin portion and a thick portion are mixed.

  The adhesive base paper roll 12 is mounted on the supply shaft 11 of the unwinding unit 10 of the label processing apparatus 20 shown in FIG. 1, and the apparatus is operated. The unrolled adhesive paper 2 is guided by the guide roller 22 to reach the first surface printing step 40, and an image 45 such as characters and designs is printed on the surface of the label substrate 5 as shown in FIG. In FIG. 2, an outline 47 scheduled to be the outer periphery of the label 4 is indicated by a virtual line. At the same time, in preparation for the subsequent steps, a marker 46 (such as a cross mark) is printed on the portion that will become the label residue 9. In addition, you may print the range which reduces adhesive force in preparation for the adhesive force reduction process 50 of the next process. The contour line indicating the range to be reduced may be larger than the contour 47 of the label 4.

  Next, the adhesive paper 2 on which the image 45 and the marker 46 are printed is separated into the adhesive paper main body 3 composed of the label base material 5 and the adhesive layer 6 and the separator 7 at the position of the counter roller 31 and separately. Drive the route.

  3A is a plan view showing a state in which the coating layer 8 is formed on the surface of the pressure-sensitive adhesive layer 6, and FIG. 3B is a cross-sectional view taken along the line bb. The separated pressure-sensitive adhesive paper body 3 reaches the pressure reduction step 50, and a coating layer 8 is formed by printing a UV curable coating (ink, varnish, medium, etc.) on a predetermined portion of the pressure-sensitive adhesive layer 6 surface. A part of the agent layer 6 is covered. When the ink or varnish is cured by the UV curing device 54, the adhesive strength is reduced, and the coating layer 8 is formed on a part of the portion that will become the label residue 9 as shown in FIG. In FIG. 3A, the portion that is half-cut in the subsequent process and becomes the outline 47 of the label 4 is indicated by an imaginary line. The covering layer 8 has a range surrounded by a contour line 8 a that is slightly larger than the contour 47 of the label 4 and a contour line 8 b along the edge of the adhesive paper main body 3. That is, the covering layer 8 sandwiched between the front and rear labels is connected in a ladder shape with the covering layer 8 c extending along both edges of the adhesive paper body 3. In the adhesion reducing step 50, when the coating layer 8 is applied to the label 4, the adhesiveness around the label 4 is impaired. Therefore, the outline 8a is slightly larger than the outline of the label 4 and may be 0.3 mm or more. desirable. In addition, it is convenient to color the coating agent used for the coating layer 8 beforehand. For example, when the coating material is colorless medium, it is easy to perform registration if the ink is mixed and colored.

  Subsequently, the adhesive paper main body 3 enters the confirmation area 55. In the confirmation area 55, registration is performed using the coating layer 8 and the register marks and the image 45 and the marker 46 printed on the label substrate 5 side. In the registration work, since the label base material 5 side is brighter than the confirmation area 55, the marker 46 on the surface of the label base material 5 can be visually confirmed from the adhesive layer 6 side through the label base material 5. .

  The adhesive paper main body 3 whose registration has been confirmed in the confirmation area 55 proceeds to the nip roller 35 and is pasted again to the separator 7 that has detoured in accordance with the guide rollers 33 and 34 via the accumulator 32.

  The adhesive paper 2 that has been pasted again is guided to the guide rollers 23 and 24, and reaches the next printing step. In the embodiment shown in FIG. 1, an image (not shown) is printed on the surface of the label base material 5 in a second color in the second front surface printing step 60, and on the back surface of the separator 7 in the rear surface printing step 70. Print a timing mark (not shown). The timing mark is printed when variable information is printed on the label with an electronic printer, the label is attached one by one with an automatic attaching device, or the label is removed one by one with a label peeling machine (not shown). It is a mark for optically detecting the position.

  In the second front surface printing step 60 and the back surface printing step 70, registration is made to the marker 46 printed in the first front surface printing step 40. This registration work ensures that all prints, including adhesion reduction, are in register.

  After the printing, the adhesive paper 2 is guided by the guide roller 25 and half-cut into a predetermined shape in the die-cutting process 80, so that a contour 47 for partitioning the labels 4 one by one is formed as shown in FIG.

  Subsequently, the label residue 9 is peeled off by the residue removing roll 83. A part of the label residue 9 is a non-adhesive part in which the coating layer 8 is formed and the adhesive strength is reduced, and the other part of the label residue 9 is temporarily attached to the separator 7 only by the other adhesive layer 6. Since the non-adhesive portion does not have adhesiveness with respect to the separator 7, the non-adhesive portion is easily separated from the separator 7 and taken up on the take-up shaft 96 of the residue take-up portion 95. Therefore, even when the shape of the label 4 is complicated and the thin portion 9c and the thick portion 9d are mixed in the label residue 9, the resistance when the label residue 9 is peeled off from the separator 7 becomes substantially constant, and the residue raising operation is smooth. Become.

  After completion of the scrap raising, a label continuous body 30 in which the labels 4 are arranged at regular intervals on the separator 7 as shown in FIG. 5 is formed, and is wound around the winding shaft 91 of the winding portion 90 via the guide roller 26. The roll 92 is completed.

  As described above, according to the label processing method of the present invention, the adhesive force is reduced in advance for at least a part of the pressure-sensitive adhesive layer 6 that is to become the label residue 9. Even when the shape of the label 4 is complicated and the thickness of the label residue 9 is not constant, since the resistance force when peeling the label residue 9 from the separator 7 is small, the residue raising operation can be performed smoothly. Therefore, troubles such as the cutting of the label residue 9 during processing are avoided, and the production efficiency and yield of the label 4 are improved. In addition, the frequency of occurrence of problems such as the broken label residue 4 mixed into the label roll 92 and the label residue 9 that has not been peeled off around the label 4 remains.

  It should be noted that the present invention is not limited to the above-described embodiments, and it is obvious that each embodiment can be appropriately changed within the scope of the technical idea of the present invention. In addition, the number, position, shape, arrangement, and the like of the above-described constituent members are not limited to the above-described embodiment, and can be set to a suitable number, position, shape, and the like in practicing the present invention.

  In this embodiment, a letterpress rotary printing press is used as the processing device, but it can be used regardless of the type and specification of the printing press such as a flat printing press or an offset printing press. In the letterpress rotary printing press described in the embodiment, processing was performed in the order of front surface printing, back surface printing (adhesion reduction), front surface printing, back surface printing, but the number of printing colors, order, front surface printing, back surface printing The combination is arbitrary.

  The type and material of the label substrate 5 are not particularly limited, such as paper or synthetic resin film, and are generally used as adhesive paper. For example, a paper substrate such as fine paper, coated paper, art paper, synthetic resin film made of PET (polyethylene terephthalate), PE (polyethylene), PP (polypropylene), PS (polystyrene), or the above synthetic resin A composite sheet obtained by combining a plurality of types and a synthetic resin film and paper can also be used. Thermal paper may be used.

  The pressure-sensitive adhesive of the pressure-sensitive adhesive layer 6 is, for example, an emulsion system (in which the pressure-sensitive adhesive is dispersed in water), a solvent system (in which the pressure-sensitive adhesive is dissolved in a solvent), a hot melt system (using thermoplasticity), or the like. is there. Examples of the material include adhesives such as synthetic rubber, natural rubber, acrylic resin, polyvinyl ether resin, urethane resin, and silicone resin. The adhesive strength of the adhesive is arbitrary.

  The separator 7 may be, for example, a paper or film coated with an ultraviolet curable silicone, a thermosetting silicone, a solvent silicone, an alkyl pendant polymer, or a fluorine-based release agent.

  In the previous embodiment, the coating layer 8 is provided on both the width direction label residue 9a and the label residue continuous portion 9b so as to surround the label 4, but may be provided only on the width direction label residue 9a. The position and arrangement for forming the coating layer 8 are arbitrary. The ratio of the covering layer 8 to the entire area of the label residue 9 is also arbitrary.

2 Adhesive Paper 3 Adhesive Paper Main Body 4 Label 5 Label Base Material 6 Adhesive Layer 7 Separator 8 Covering Layer 8a Contour Line 8b Contour Line 8c Covering Layer 9 Label Waste 9a Width Direction Label Waste 9b Label Waste Continuous 9c Thin Part 9d Thick Part 10 Unwinding Part 20 Printing machine (label processing equipment)
21 Printing machine (label processing equipment)
30 Label continuum 40 First surface printing process 46 Marker 47 Contour 50 Adhesion reducing process 55 Confirmation area 60 Second surface printing process 70 Back surface printing process 80 Die cutting process 90 Winding part 95 Waste winding part

Claims (1)

An unwinding step of unwinding a long strip of pressure-sensitive adhesive paper comprising a label base material and a pressure-sensitive adhesive body composed of a pressure-sensitive adhesive layer and a separator,
A printing process for printing on the label substrate;
A separation step of separating the adhesive paper into an adhesive paper body and a separator;
A pressure-reducing step of forming a non-adhesive part by forming a non-adhesive coating layer on a part of the pressure-sensitive adhesive layer surface of the separated adhesive paper body,
A pasting step in which the adhesive paper body provided with the non-adhesive part and the separator are bonded again;
A die-cutting process in which the adhesive paper is half-cut to form a predetermined label;
A residue raising process for removing unnecessary portions around the label;
In this order ,
At least in the printing process, a registration marker is printed around a label that is to be an unnecessary part,
In the adhesive force-reducing step, the coating layer is formed on at least a part of the portion sandwiched between the labels around the label that is to be registered by using the marker and becomes an unnecessary portion through the die-cutting step. A label processing method characterized by the above.

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