JP6135850B2 - Adhesive sheet and processing method of adhesive sheet - Google Patents

Description

  The present invention relates to a technology for processing a sheet (adhesive sheet) subjected to adhesive processing such as a label or a slip, and particularly relates to an adhesive sheet suitable for continuous punching and a processing method for the adhesive sheet.

  The technique of peeling the backing paper to expose the adhesive and sticking it to an article or the like is widely used for labels and the like. In addition to a single-sheet configuration such as a label, there is a form in which a plurality of bound sheets of paper are pasted, such as a delivery slip. In this way, the convenience of applying glue material in advance is useful in daily life and industry, so there are various forms of products based on adhesive sheets, but on the other hand, the process of processing into products Then, it has a troublesome problem caused by the adhesive.

In general, processing of sheet-like materials such as paper is accompanied by “cutting” that punches into a predetermined shape and “embossing” that gives unevenness. Then, there exists a problem that an adhesive adheres to a blade.
For example, in the method called big punching widely used in paper punching, etc., the plate-like pressing blade is pressed against the sheet-like material and cut by intruding the blade, but the sheet-like material is an adhesive sheet Inevitable adhesion of adhesive to the blade.

FIG. 3 is a schematic diagram showing a mode of cutting by the pressing blade. As shown in FIG. 3A, the pressing blade 31 makes a cut by the blade edge pushing and expanding the sheet-like material.
In FIG. 3, the mode using the sheet material 32 with the adhesive layer as the sheet material is shown, and the sheet material 32 with the adhesive layer has a configuration in which the sheet-like base material 33, the adhesive layer 34, and the release sheet 35 are sequentially laminated. It is said.

  When the sheet material 32 with the adhesive layer is cut by the pressing blade 31, the blade tip penetrates the adhesive layer 34, and the adhesive and the side surface of the blade rub against each other, so that the adhesive adheres to the blade. If such cutting is repeated, the pressure-sensitive adhesive accumulates on the surface of the blade and obstructs the biting of the blade edge, or the pressure-sensitive adhesive in a lump adheres to the sheet material 32 side with the pressure-sensitive adhesive layer and mixes into the product. A malfunction occurs.

Here, the form of cutting by the pressing blade will be explained. When the pressing blade is pushed out until the sheet-like material is cut, it becomes “full cut”, but when it is only halfway intruded, it becomes “half cut”. . FIG. 3B shows a “full cut”, and FIG. 3C shows a half cut mode.
As shown in FIG. 3C, in the half cut, a part of the sheet material 32 with the adhesive layer in the thickness direction is connected without being cut. An example of half-cutting is a method of making a cut that leaves the release paper from the mount and peels only the label portion.

  A typical pressing blade is called a Thomson blade, and is often used as a “cutting die” for punching a sheet-like material into a predetermined shape. The Thomson blade has a structure in which a band-shaped blade is embedded in a groove formed in a predetermined shape by laser engraving or the like. In the punching die, the blade is formed so as to have a “closed shape” of a punching shape. The blade shape used for drilling is typical of such a closed blade shape.

  In addition, as the pressing blade, there are a corrosion blade and an engraving blade. These are because the edge of the blade is formed from a metal material by etching or cutting. Since such a blade can be formed on the surface of the roller, it is suitable for processing a web-like material such as continuous paper.

FIG. 4 is a diagram showing an engraving blade. FIG. 4A is a schematic diagram of an engraving blade 41 for punching out a circle. Since the engraving blade 41 punches out a circle, the cutting edge has an annular closed shape.
FIG. 4B shows the cross-sectional shape of the engraving blade 41. The cutting edge 43 of the engraving blade 41 is characterized by being integrated with the base 42. By finishing the base 42 thin, the engraving blade 41 can be mounted so as to follow the curved surface of the cylinder.
The corrosion blade has a similar shape.

  When using a pressing blade, a “receiving plate” is usually placed on the surface facing the blade in both the full cut and the half cut. Although not shown in the drawing, in the case of FIG. 3, a force is applied to the pressing blade by a support plate on the side of the release sheet. Even when the pressing blade is formed on the curved surface of the cylinder, the blade is received using an impression cylinder that rotates in synchronization with the cylinder.

In addition to the method using a pressing blade, there is a method of using a blade called a pin and a die as a set in the method for drilling a sheet-like material.
FIG. 5A is a diagram showing pins and dice. As shown in FIG. 5B, a sheet material 54 is sandwiched between a pin 51 that is a male blade and a die 52 that is a female blade, the pin 51 is pushed into the die 52, and a hole is punched out by a shearing force. Drilling with a pin / die is suitable for continuous drilling because the punched residue 55 can be pushed out and discharged as it is.

As shown in FIG. 5C, a rotary method in which a die 52 and a pin 51 are provided on the circumference of a cylinder and drilled while rotating in synchronization is particularly suitable for high-speed drilling.
For example, Patent Document 1 has a description about pins and dies and a description about a rotary drilling device using these.

Japanese Utility Model Publication No. 63-74297

However, as shown in FIG. 5B, when the pin 51 punches out the sheet-like material 54, when the sheet-like material 54 is an adhesive sheet, the pin 54 and the adhesive layer 34 come into contact with each other. 34 adhesive adheres to the pin 54, and the same trouble as in the case of the pressing blade occurs. Further, since the adhesive adhered to the pin 51 enters between the pin 51 and the die 52, the operation of the pin 51 may be hindered.
Therefore, an object of the present invention is to provide a pressure-sensitive adhesive sheet that does not cause adhesion of the pressure-sensitive adhesive to the blade even in the punching process of the pressure-sensitive adhesive sheet, and a processing method therefor.

The first invention of the present application is a pressure-sensitive adhesive sheet subjected to drilling processing,
The pressure-sensitive adhesive sheet has at least a sheet base material, a pressure-sensitive adhesive layer, and a release sheet laminated in this order,
The processing drilling comprises a first half and the cut, the second half cut provided on the release sheet to the second hole shape provided in the sheet base material in the first hole shape,
The first half-cut is a cut reaching at least the adhesive layer applied from the sheet-like substrate side, and the second half-cut reaches at least the adhesive layer applied from the release sheet side. and wherein the cutting der Rukoto

Moreover, without a said first hole shape and the second hole shape overlap each other and one of the hole shape is characterized inwardly such Rukoto the other hole shapes.

2nd invention of this application is a processing method of the said adhesive sheet , Comprising: While putting a receiving plate in the surface facing the 1st blade for forming the said 1st hole shape , the said 1st blade A first step of making a cut reaching at least the adhesive layer from the surface of the sheet substrate;
A receiving plate is placed on a surface facing the second blade for forming the second hole shape, and a second cutting is performed by the second blade to reach at least the adhesive layer from the surface of the release sheet. These steps are characterized by comprising:

The figure which shows the adhesive sheet processing method of this invention Diagram showing drilling device Diagram showing pressing blade A figure representing an engraving blade Diagram showing pins and dice

FIG. 1 is a diagram showing a method for processing an adhesive sheet according to the present invention, and shows a procedure for drilling by the processing method in a sectional view.
In FIG. 1, the sheet-like material is a sheet material 32 with an adhesive layer comprising a sheet-like base material 33, an adhesive layer 34, and a release sheet 35. Drilling is performed using a second blade (referred to as the lower blade).

FIG. 1A shows a state in which the upper blade 11 has entered the sheet material 32 with the adhesive layer from the sheet-like base material 33 side (for convenience, the upper surface). (First step)
FIG. 1B shows an aspect of the cut 11 a by the upper blade 11. The cut 11a is a half cut, and it is sufficient that the tip thereof reaches at least the adhesive layer.

FIG. 1C shows a state in which the lower blade 12 has entered the sheet material 32 with the adhesive layer from the release sheet 35 side (for convenience, the lower surface). (Second step)
The lower blade 12 has a shape that includes the shape of the upper blade 11, and the positional relationship between the upper blade 11 and the lower blade 12 in FIG. 1C is set so that the lower blade 12 includes the upper blade 11. .
For example, if the shape of the upper blade 11 is a perfect circle, the lower blade 12 is a perfect circle containing the upper blade 11, and the positional relationship between them is a concentric relationship. If the upper blade 11 is indefinite, the shape of the lower blade 12 is an indeterminate shape having a mirror image relationship with the upper blade 11, and the lower blade 12 has a positional relationship including the upper blade 11. The reason why the shape becomes a mirror image between the lower blade 12 and the upper blade 11 is because the lower blade 12 and the upper blade 11 are opposed to each other.
FIG. 1 (d) shows an aspect of the cut 12 a by the lower blade 12. The cut 12a has a half-cut shape, and it is sufficient that the tip thereof reaches at least the adhesive layer 34.

  As a result, the cut 11a (first half cut) and the cut 12a (second half cut) of the half cut are entered from the upper surface and the lower surface of the sheet material 32 with the adhesive layer, and thus the punching portion 14 is formed. Is formed and becomes the pressure-sensitive adhesive sheet 10 of the present invention. At this time, the inside and outside of the hole are slightly connected by the adhesive layer 34.

FIG. 1 (e) shows a mode in which the punched residue 37 is removed from the hole-forming portion 14 and the hole 36 is penetrated. (Third step)
Since the inner side and the outer side of the hole 36 are separated by a minute force, the punched residue 37 can be easily removed by spraying compressed air, vacuum suction, or a stick.

In addition, said (a)-(e) is an example of the procedure of drilling, The order of a process of the upper blade 11 and the lower blade 12 or the order of a process of an upper surface and a lower surface can be changed suitably. Moreover, in the example shown in FIG. 1, although the cut 11a showed the aspect which becomes the inside of the cut 12a, not only this but the aspect where the cut 12a becomes the inside of the cut 11a may be sufficient. .
As the upper blade 11 and the lower blade 12, any of a Thomson blade, a corroded blade, and an engraved blade can be suitably used as long as they are pressing blades.

Fig.2 (a) is a block diagram of the drilling apparatus which performs from the punching of an adhesive sheet to a removal of a residue.
The hole punching device 20 has an upper blade cylinder 21 to which an upper blade is attached and a lower blade cylinder 22 to which a lower blade is attached, and makes a hole in a sheet material 32 with a web-like adhesive layer. Further, a cylinder (referred to as an impression cylinder) 23 serving as a receiver for the upper blade cylinder 21 and the lower blade cylinder 22 is disposed with an adhesive layer-attached sheet material 32 interposed therebetween.
In the drilling device 20 shown in FIG. 2, the reversing mechanism 24 is placed between the upper blade cylinder 21 and the lower blade cylinder 22, and the surface of the sheet material 32 with the adhesive layer is reversed, so that the lower blade cylinder 22 is placed on the upper side in the figure. It is arranged.

FIG. 2B is a partially enlarged view in the vicinity of the upper blade cylinder 21. The lower blade cylinder 22 has the same configuration.
The upper blade cylinder 21 is provided with an upper blade 21a adjusted for half-cutting with a predetermined hole shape, and the upper blade cylinder 21 rotates in synchronization with the impression cylinder 23 while one side of the sheet material 32 with the adhesive layer. Apply half-cut processing to
Similarly, the lower blade cylinder 22 also performs half-cut processing on the other surface of the sheet material 32 with adhesive layer.

  2 (a) is for forcibly removing and discharging the removed residue 37. The removed residue 37 is sucked up from the suction port 27 by the air flow created by the suction blower 26, and is collected in the collecting section 28. Discharge. In order to more reliably remove and discharge the punched residue 37, it is preferable to use the air blowing device 29 together. The air blowing device 29 is more effective when it is timed in accordance with the perforating portion 14 and sprayed in a pulse shape.

  As described above, according to the pressure-sensitive adhesive sheet processing method of the present invention, the blade passes through the pressure-sensitive adhesive layer by making a cut by half-cutting from both sides of the pressure-sensitive adhesive sheet even in punching such as drilling. Therefore, the sticking of the pressure-sensitive adhesive to the blade is suppressed, which is effective in maintaining the sharpness of the blade and preventing the pressure-sensitive adhesive from sticking to other places.

DESCRIPTION OF SYMBOLS 10 Adhesive sheet 11 Upper blade 12 Lower blade 14 Hole punching part 20 Hole punching device 21 Upper blade cylinder 22 Lower blade cylinder 23 Impression cylinder 24 Reversing mechanism 25 Drainage suction device 29 Air blowing device 31 Pressing blade 32 Sheet material with adhesive layer 33 Sheet Substrate 34 Adhesive layer 35 Release sheet 41 Engraving blade 51 Pin 52 Dice

Claims (3)

In the adhesive sheet that has been drilled,
The pressure-sensitive adhesive sheet has at least a sheet base material, a pressure-sensitive adhesive layer, and a release sheet laminated in this order,
The processing drilling comprises a first half and the cut, the second half cut provided on the release sheet to the second hole shape provided in the sheet base material in the first hole shape,
The first half-cut is a cut reaching at least the adhesive layer applied from the sheet-like substrate side, and the second half-cut reaches at least the adhesive layer applied from the release sheet side. pressure-sensitive adhesive sheet characterized by cutting der Rukoto. It said first hole shape and the second hole shape and is without overlapping each other and the adhesive sheet according to claim 1, wherein one of the hole shape is characterized inwardly such Rukoto the other hole shapes. It is the processing method of the adhesive sheet of Claim 1 or 2 , Comprising: While putting a receiving plate in the surface facing the 1st blade for forming the said 1st hole shape, with the said 1st blade A first step of making a cut reaching at least the adhesive layer from the surface of the sheet substrate;
A receiving plate is placed on a surface facing the second blade for forming the second hole shape, and a second cutting is performed by the second blade to reach at least the adhesive layer from the surface of the release sheet. And the steps
A method for processing a pressure-sensitive adhesive sheet, comprising forming a perforated portion.

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