JP2008233890A - Shrink label, manufacturing method therefor, and die cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shrink label satisfying both ease of pinching and ease of tearing, without degrading the strength of a label, without requiring a large scale replacement of equipment and without raising the cost of packing materials. <P>SOLUTION: The shrink label has the shape of a cylinder and is fitted on a container 1 to cover its body 2. At least either one end part 11 of the upper end part 11a or the lower end part 11b of the cylinder has a parallel edge, being parallel to the circumferential direction of the cylinder and a slanted edge slanted off the circumferential direction or an orthogonal edge perpendicular to the circumferential direction. On one end side of the slanted edge or the orthogonal edge, a slit 15 that is not connected to the edge 14 of the end part 11 is provided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a shrink label that covers the body of a bottle-like container such as a plastic bottle or a glass bottle using heat shrinkage, and more particularly to a shrink label that can be easily removed.

  In recent years, many bottles (PET bottles) made of polyethylene terephthalate resin have been used in beverage containers together with glass bottles and cans. Here, a technique for attaching a so-called shrink label, which is label-printed on a shrink film, to the bottle by thermal contraction, is often used without label printing on the PET bottle itself.

However, since it is required to remove the shrink label in the used container due to the problem of recycling, a device has been devised so that the shrink label can be removed from the bottle (for example, see Patent Documents 1 to 3). ).
JP-A 63-258775 JP 2000-159235 A JP 2002-132161 A

  However, it cannot be said that the techniques disclosed in Patent Documents 1 to 3 satisfy the ease of pinching at the time of tearing the shrink label and the ease of subsequent tearing.

  Furthermore, even if both the ease of pinching and the ease of tearing are satisfied, it is not practical in practice if the strength of the label is reduced, the equipment needs to be changed, or the cost of the packaging material is increased.

  Therefore, the object of the present invention is to satisfy both ease of gripping and ease of tearing without causing a reduction in the strength of the label, without requiring a large equipment change, and without increasing the cost of the packaging material. To provide shrink labels.

  Another object of the present invention is that when cutting a shrink label according to the present invention from an uncut shrink label, the uncut shrink label having a different cylinder diameter can be easily switched and cut. It is an object of the present invention to provide a die cutter capable of easily switching the label height and cutting it into a normal shrink label.

  The inventor has provided a protrusion-like knob on a part of the label end portion, and added an auxiliary cut that can be a starting point of tearing so as not to be connected to the cut edge near the protrusion portion, thereby solving the above-described problem. Finding that a label can be obtained, and providing a notch at a part of the end of the label, and adding an auxiliary cut near the bottom of the notch so as not to connect to the cut edge. The present inventors have found that a resolved shrink label can be obtained and completed the present invention.

  Specifically, the shrink label according to the present invention has a cylindrical shape, and is a shrink label that covers and is attached to the body of the container. At least one of the upper end portion and the lower end portion of the cylinder is provided. Has a parallel edge parallel to the circumferential direction of the cylinder and an inclined edge that is inclined with respect to the circumferential direction or an orthogonal edge that is orthogonal to the circumferential direction. It is characterized by having a cut that is not connected to.

  In the shrink label according to the present invention, the inclined edge or the orthogonal edge is formed by providing a protruding knob on at least one of the upper end part or the lower end part of the cylinder, A first form provided at the root portion where the knob rises from the end portion is included.

  In the shrink label according to the present invention, the inclined edge or the orthogonal edge is formed by providing a cut in at least one of an upper end part or a lower end part of the cylinder, and the cut line is a bottom part of the cut. In addition, a second configuration in which the cut and the cut are provided in left and right pairs is also included.

  In the shrink label according to the present invention, the cut line includes a line segment portion extending in a direction parallel to the edge of the end portion, and a hatched portion extending from one end of the line segment portion toward the center of both ends of the cylinder. It is preferable to have a so-called hem-shaped cut. When stress is applied to the root portion of the knob at the time of removing the shrink label, the root portion can be used as a starting point with high probability.

  Here, in the shrink label according to the present invention, the line segment part and the hatched part are both linear, or the line segment part is linear and the hatched part is curved, or The case where the line segment part is curved and the oblique line part is linear, or the line segment part and the oblique line part are both curved is included.

  Further, in the shrink label according to the present invention, a straight line extending in parallel to the cylinder axis direction through a region sandwiched between the left and right root portions of the knob or a region sandwiched between the left and right bottom portions of the cut. It is preferable that two perforated lines are provided. Since the cut is the starting point of the tear, and the perforation then guides the tear across the label, a tear can be made across the shrink label.

  In the shrink label according to the present invention, it is preferable that the cylinder sticking is positioned so as to pass through a region sandwiched between the left and right root portions of the knob or a region sandwiched between the right and left bottom portions of the cut. The sticking of the tube serves as a reinforcing portion, and there is little possibility that the tear will be divided in the middle. Moreover, since the knob is not made larger than necessary, the appearance of the label does not change significantly as compared with the conventional label.

  The shrink label manufacturing method according to the present invention has a cylindrical shape in which cylinder sticking is provided by center sealing the plastic film so that the length direction of the wound plastic film coincides with the cylinder axis direction. And forming a folded uncut shrink label so that a fold line is positioned next to the tube attachment, and forming a projection-like knob on the fold line. The cutting step and the step of providing a cut not connected to the cut edge at the root portion where the knob rises from the end portion of the label formed by being cut, To do.

  The shrink label manufacturing method according to the present invention has a cylindrical shape in which cylinder sticking is provided by center sealing the plastic film so that the length direction of the wound plastic film coincides with the cylinder axis direction. And a step of forming a folded uncut shrink label so that a fold line is located next to the tube pasting, a step of cutting the uncut shrink label and providing an end of the label, and a cut A step of providing a cut so as to be connected to the cut edge, and a step of providing a cut not connected to the cut edge at the bottom of the cut. Here, if these steps are included, the present invention falls within the scope of the present invention, and both the form in which the cut and the cut are provided after the cut edge is provided and the form in which the cut and the cut are provided before the cut edge are provided. Included in the present invention.

  In the method for producing a shrink label according to the present invention, the step of forming the folded uncut shrink label is performed by centering the plastic film so that the length direction of the wound plastic film coincides with the cylinder axis direction. A step of preparing a wound product of an uncut shrink label in which a cylindrical body that has been sealed and applied with a cylinder is wound up in a roll shape, and a new fold next to the cylinder pasting while unwinding the wound product Preferably, the method further comprises a step of folding the uncut shrink label again so that the line is positioned. By providing a plurality of folds, it is easy to spread the folded cylinder. Thereby, the mounting defect of the shrink label to the container can be reduced.

  In the shrink label manufacturing method according to the present invention, it is preferable that the new fold line is formed by tetra-folding in the step of folding the uncut shrink label again. A wound product in which the cylinder sticking is located at the center is easy to manufacture, and a new fold line can be easily formed next to the tube sticking using the wound product.

  The shrink label manufacturing method according to the present invention further includes a step of providing perforations on both sides of the plastic film before the center seal, and the step of performing the tetra-folding is performed while unwinding the wound product. It is preferable that the uncut shrink label is tetra-folded so that the fold line is located in a region sandwiched between the cylinder pasting and the perforation. It becomes easy to process so that the perforation is located on both sides centered on the knob.

  The die cutter which concerns on this invention is a die cutter which has a die roll and a receiving roll used in the manufacturing method of the shrink label which concerns on this invention, Comprising: The said die roll is provided in the roll surface in parallel with the roll axial direction. A label cutting cutter blade comprising the linear blade portion and the linear blade portion and a blade portion for forming a knob connected at the end of the roll surface; and the linear blade portion and the knob formation A cutting cutter blade for making a cut, which is provided next to a connecting portion with a cutting blade portion, and the die roll and the receiving roll have the label cutting cutter blade and the cutting cutter blade Install so that the surface of the die roll and the surface of the receiving roll do not sandwich an uncut shrink label except where it is provided. It is is, the main body for holding said receiving roll and the die roll, and wherein the left and right movable slide mechanism is provided in a direction perpendicular to the feeding direction of the uncut shrink labels.

  According to the present invention, the shrink label does not cause a decrease in the strength of the label, does not require a large equipment change, and does not increase the cost of the packaging material. Can be made.

  Moreover, according to the die cutter according to the present invention, when cutting the shrink label according to the present invention from the uncut shrink label, it is possible to easily switch and cut the uncut shrink label having a different cylinder diameter, The height of the shrink label can be easily switched and cut, and it is also possible to cut into a normal shrink label.

  Embodiments of the present invention will be described with reference to the accompanying drawings. The embodiment described below is an example of the configuration of the present invention, and the present invention is not limited to the following embodiment.

  The shrink label according to the present embodiment has a cylindrical shape, and is a shrink label that covers and is attached to the body of the container, and at least one of the upper end portion and the lower end portion of the cylinder is the end of the cylinder. It has a parallel edge parallel to the circumferential direction and an inclined edge that is inclined with respect to the circumferential direction or an orthogonal edge that is orthogonal to the circumferential direction, and a cut that is not connected to the edge of the end is formed on one end side of the inclined edge or the orthogonal edge. Is provided. When tearing from the end of a cylinder to peel off the label, the stress is concentrated on a specific part of the edge of the end, and an auxiliary that can be a starting point of tearing that is not connected to the edge near the stress concentrated part Since the target cut is added, the ease of tearing the label is improved without causing a decrease in the strength of the label. Here, the parallel edge means that a shrink label is formed by cutting a shrink film processed into a long cylindrical shape with a surface crossing the cylinder axis direction, and the cut mark is the upper end or lower end of the cylinder. It is the edge of the end. The parallel edge is edged parallel to the circumferential direction of the cylinder. When the parallel edge is the basic shape of the edge of the shrink label, the edge has a shape that is different from the basic shape, that is, the edge that is inclined with respect to the circumferential direction (inclined edge) or the edge that is orthogonal (orthogonal) Edge). The specific part of the edge of the edge where the stress is concentrated corresponds to, for example, a part where the shape of the edge is changed, that is, the vicinity of the boundary between the parallel edge and the inclined edge or the vicinity of the boundary between the parallel edge and the orthogonal edge. Specific examples of the means for concentrating the stress include providing a protrusion-like knob at the end (first form) or providing a notch (second form). First, the shrink label (1st form) which concerns on this embodiment is demonstrated using FIG.

  FIG. 1 is a schematic view showing one form of a shrink label according to the present embodiment covering a bottle, in which (a) is an overall view and (b) is a partially enlarged view of A. FIG. As shown in FIG. 1, the shrink label 10 according to the present embodiment has a cylindrical shape, and is a protruding label on the upper end portion 11 a of the cylinder in the shrink label that is mounted so as to cover the body 2 of the container 1. 12, and a cut 15 that is not connected to the edge 14 of the upper end 11a is provided at the root 13 where the knob 12 rises from the upper end 11a. Here, it is preferable that the edge 14 of the end portion is cut by providing a protruding knob 12. At this time, the cut 15 is not connected to the cut edge 14. Further, a separate protruding knob may be fixed to the end of the shrink label by adhesion, fusion, or the like (not shown).

  The container 1 may be any container as long as the body 2 can be covered with the shrink label 10. For example, the container 1 is a glass container or a plastic container, and its use is for beverages and foods. Among them, shrink labels are frequently used in plastic beverage bottles. Here, the coverage of the shrink label 10 varies depending on the capacity of the container 1, and a 500 ml PET bottle generally covers only the side body of the body 2 (for example, the form shown in FIG. 1A). In many cases, the 2-liter PET bottle covers only the shoulder portion of the body 2 (not shown) in order to avoid an increase in the size of the shrink film. Of course, you may coat | cover the whole body 2 except a mouth part (not shown). Alternatively, a filled container in which the body 2 of the container 1 is covered (not shown) may be covered including the cover.

  The shrink label 10 is formed of a film having a property of contracting by applying heat such as blowing hot air. Examples of the material of the film include polyethylene, polypropylene, polyethylene terephthalate, vinyl chloride, OPS (biaxially stretched polystyrene), and multilayer polyolefin. The shrink label 10 has a cylindrical shape, and is covered with the body 2 of the container 1 before being thermally contracted, and is thermally contracted by blowing hot air, for example. As a result, as shown in FIG. 1A, the body 2 of the container 1 is covered and attached.

  In addition, the shrink label 10 is bonded together by aligning both end portions of the film so as to have a cylindrical shape. At this time, the glue allowance to be bonded is referred to as cylinder pasting 16, and the cylinder pasting 16 has two films overlapped with each other, and therefore has higher rigidity than other parts.

  In the shrink label 10 according to this embodiment shown in FIG. 1A, a protruding knob 12 is provided on the upper end portion 11a of the cut cylinder. The protruding knob 12 is formed by cutting an uncut shrink label with a blade-type cutter whose cut shape forms a protruding shape. Therefore, the protruding knob 12 is integrated with the film. Moreover, you may provide the protrusion-shaped knob 12 in the lower end part 11b of a shrink label. In order to obtain this form, the shrink label 10 of FIG. Therefore, the shape of the shrink label 10 itself may be the same as the case where the protruding knob 12 is provided on the upper end portion 11a of the shrink label 10. When the protruding knob 12 is provided at either one of the upper end portion 11a and the lower end portion 11b of the cut tube, a concave portion 18 having a shape corresponding to the protruding knob 12 is provided at the opposite end portion. Is cut. The reason for this shape is that when the shrink label is cut, the cut portion becomes the lower end portion of the shrink label and the upper end portion of the shrink label that is subsequently cut. By cutting in this way, there is no extra cutting allowance. Moreover, in order to improve the convenience for peeling a shrink label, you may provide the protrusion-shaped knob 12 in both the upper end part 11a and the lower end part 11b (not shown).

  The edge of the end portion 11 of the shrink label 10 and the edge of the knob 12 are connected together and are the cut edge 14. The base portion 13 where the knob 12 rises from the end portion 11 is provided with a cut 15 that is not connected to the cut edge 14. The cut 15 is an auxiliary cut. When the knob 12 is pinched to tear, stress concentrates on the root portion 13, but by providing the cut line 15, the cut film 15 can be easily cut and the tear film 10 can be easily cut. Become. Here, if the cut 15 is connected to the cut edge 14, the required strength cannot be obtained, and troubles such as peeling of the label during transportation of the container may occur. In the present invention, the required strength is prevented from being lowered by separating the cut edge 14 from the cut 15 that is the starting point of the tear.

  The corners on both ends of the knob 12 are preferably rounded and cut. If the tip corners of the knob 12 are angular, there is a tendency that the shrink label 10 is easily turned over when the shrink label 10 is thermally contracted.

  In the shrink label 10 according to the present embodiment, as shown in FIG. 1B, the cut 15 is pinched from one end of the line segment portion 15a and the line segment portion 15a extending in a direction parallel to the edge of the end portion 11. It is preferable that it is a so-called hem-shaped cut line composed of a hatched portion 15b extending in a direction opposite to the direction of 12 protrusions. When stress is applied to the root portion 13 of the knob 12 when the shrink label 10 is removed, the root portion 13 can be used as the starting point of tearing with high probability.

  In FIG. 1B, both the line segment portion 15a and the shaded portion 15b are linear, but as another form, the line segment portion 15a is linear and the shaded portion 15b is curved, or The line segment portion 15a may be curved and the shaded portion 15b may be linear, or the line segment portion 15a and the shaded portion 15b may both be curved. Further, the line segment portion 15a and the shaded portion 15b may be zigzag lines instead of being linear or curved.

Furthermore, the angle θ ₁ or θ ₂ formed by the line segment portion 15a and the shaded portion 15b in a so-called hem-shaped cut is preferably 90 ° when both the line segment portion 15a and the shaded portion 15b are linear, for example. The angle is 160 ° or more, more preferably 120 ° or more and 150 °.

  As another form of the cut 15, for example, a cut formed only by a hatched portion extending obliquely in a direction opposite to the protruding direction of the knob 12, or extends in a direction parallel to the edge of the end 11. There is a break consisting only of line segments. Here, both the hatched portion and the line segment portion may have a curved shape or a zigzag line shape. In any form, it is necessary to separate the cut edge 14 from the cut edge 15 as a starting point of tearing.

  In the shrink label 10 according to the present embodiment, two linear perforations 17 extending in parallel with the cylinder axis direction X through the region 19 sandwiched between the left and right root portions 13 of the knob 12 are provided. Preferably it is. Since the cut 15 is the starting point of the tear, and the perforation 17 guides the tear to cross the label, a tear can be made across the ends 11a and 11b of the shrink label 10. Moreover, it is preferable that the hatched portion 15 b of the cut 15 extends toward the perforation 17. It becomes easy for the tear to move from the cut 15 to the perforation 17. The hatched portion 15b of the cut line 15 and the perforation 17 may be connected to each other or may not be connected to each other.

  In the shrink label 10 according to the present embodiment, it is preferable that the cylinder pasting 16 is positioned so as to pass through a region 19 sandwiched between both the right and left root portions 13 of the knob 12. The tube sticking 16 serves as a reinforcing portion, and there is little possibility that the tear will be divided in the middle. In addition, since the strength is increased if the knob 12 is provided with the tube 16, it is not necessary to make the knob 12 larger than necessary, and the appearance of the label is not significantly changed as compared with the conventional label.

  Next, the manufacturing method of the shrink label which concerns on this embodiment is demonstrated using FIG. 2 and FIG. FIG. 2 is a schematic diagram for explaining a process for producing a cylindrical uncut shrink label from a film, wherein (a) is a diagram for explaining a process of cutting a film for a shrink label from a film, and (b) is a shrink. The figure which shows the process of the center seal | sticker of the film for labels, (c) is a figure which shows the process of the other form of (b). FIGS. 3A and 3B are schematic diagrams for explaining a tetra folding process performed before cutting the shrink label, in which FIG. 3A is a diagram showing tetra folding, and FIG. 3B is a diagram showing a crease state after the tetra folding is performed. It is.

  First, as shown in FIG. 2A, the heat-shrinkable plastic film roll-up product 20 is cut so as to have a width that matches the cylinder diameter of the shrink label. In other words, the trunk diameter of the container body varies depending on the capacity of the container, but in order to easily cover the container body with a shrink label, the cylinder diameter is several cm larger than the trunk diameter of the container trunk when cutting. Adjust the width of the film for shrink labels. As a result, the heat-shrinkable plastic film 21 cut and wound for the shrink label is obtained.

  The shrink label according to the present embodiment is manufactured using a heat-shrinkable plastic film 21 cut and wound for a shrink label. In other words, the shrink label manufacturing method according to the present embodiment provides the cylinder pasting 16 by center-sealing the plastic film 21 so that the length direction Y of the wound plastic film 21 coincides with the cylinder axis direction X. Forming a folded uncut shrink label 25 so that the folded line 23 is positioned next to the tube pasting 16 (hereinafter referred to as “folded uncut shrink label”). And a step of cutting the uncut shrink label 25 so that the protruding knob 12 is formed on the fold line 23 (hereinafter referred to as “cutting step”), and cutting. The cut edge 1 is formed on the root portion 13 where the knob 12 rises from the end portion 11 of the shrink label 10 formed by Step of providing a cut 15 which is not connected to the (hereinafter referred to. "Cut forming process") having, a. Hereinafter, each step will be described.

(Process of forming a folded uncut shrink label)
In this step, first, as shown in FIG. 2B, while unwinding the wound plastic film 21, the plastic film 21 is placed so that the length direction Y of the plastic film 21 coincides with the cylinder axis direction X. Center seal. Center sealing is performed by adhering the overlapped portions of the plastic film 21 while feeding both ends in the width direction while feeding the plastic film 21 in the longitudinal direction Y. The overlapped portion is the cylinder pasting 16. In this way, a cylindrical uncut shrink label 24 in which the length direction Y and the cylinder axis direction X coincide is obtained. The uncut shrink label 24 is wound into a roll to prepare a wound product 22 of an uncut shrink label (hereinafter referred to as “preparation step of a wound product of an uncut shrink label”).

  In the preparation process of the wound product of the uncut shrink label, as shown in FIG. 2 (c), by creating the wound product so that the fold line is next to the tube pasting 16, in FIG. 3 (b) An uncut shrink label in a folded state similar to the shrink label shown is obtained.

  On the other hand, as described above, the wound product may be manufactured so that the first folding line is positioned next to the tube pasting 16, but in this embodiment, the tube pasting 16 is unwound while unwinding the wound product 22. More preferably, a step of folding the uncut shrink label 24 again (hereinafter referred to as “step of folding the uncut shrink label again”) is added so that a new fold line is positioned next to the line. By providing a plurality of folds, the folded cylinder can be easily spread when it is put on the container. This can reduce label mounting defects.

  The step of folding the uncut shrink label again is more preferably a “tetra-folding step” described below. That is, as shown in FIG. 3, the tetrahedral tetra 26 is arranged in the cylinder of the uncut shrink label 24, and the uncut shrink label 24 is unwound while unwinding the wound product (not shown). Send to. When passing through the tetra 26, the uncut shrink label 24 is folded back so as to be twisted by 90 ° to be a folded uncut shrink label 25. At this time, as shown in FIG. 3B, tetra-folding of the uncut shrink label 24 is performed so that the fold line 23 is positioned next to the cylinder pasting 16. Since the cylinder sticking 16 is a place where the films are overlapped with each other, the pipe sticking 16 is difficult to make the fold line 23 because the rigidity is higher than that of other places. Therefore, it is preferable that the folding line 23 is formed by folding the cylinder pasting 16 immediately next to it. Therefore, when preparing the wound product 22 of the uncut shrink label 24, it is preferable to fold the cylinder so that the cylinder pasting 16 passes through substantially the center. As a result, the folding line 23 is positioned next to the cylinder pasting 16 through the tetra folding process.

  In addition, in the manufacture of the uncut shrink label wound product 22 shown in FIGS. 2 (b) and 2 (c), in addition to the fold line generated during winding, another fold line is provided so that the cylinder can be easily expanded. May be added. Thereby, the step of folding the uncut shrink label again and the step of tetra-folding can be omitted.

(Cut process)
The uncut shrink label 25 that has been folded back is cut so that the protruding knob 12 is formed on the fold line 23, and the cut shrink label 10 as shown in FIG. 3B is formed. The cut shrink label 10 shown in FIG. 3 (b) is folded at the fold line 23, but when expanded, the knob 12 is developed into the shape shown in FIG. 1 (b).

(Cutting process)
A cut 15 that is not connected to the cut edge 14 is provided at the root 13 where the knob 12 rises from the upper end 11a of the shrink label 10 formed by cutting. The cut 15 can be formed by piercing the blade of the cutter. Further, as shown in FIG. 3B, by cutting the blade of the cutter when the shrink label 10 is folded along the fold line 23, the front side cut 15 and the back side cut (not shown) in FIG. Can be formed simultaneously with one operation using one blade. The cut forming process may be performed separately from the cutting process, but by using the cutter blade for shrink labels used in the cutting process and the cutter blade for cutting used in the cut forming process together in one operation. The shrink label may be cut and the cut formed at the same time.

  Here, the die cutter which concerns on this embodiment which can advance a cutting process and a cut | interruption formation process simultaneously is demonstrated using FIG. 4 and FIG. Drawing 4 is a schematic diagram showing one form of a die cutter concerning this embodiment, (a) is a front view and (b) is a side view. Here, the shrink label is also illustrated. FIG. 5 is a schematic view for explaining a method of using the die cutter according to the present embodiment. FIG. 5A is an explanatory view when manufacturing a shrink label with a knob, and FIG. 5B is obtained by FIG. Schematic diagram of the shape of the produced shrink label, (c) is an explanatory diagram in the case of manufacturing a shrink label with a knob having a cylinder diameter smaller than the case of (a), (d) is obtained by (c) Schematic diagram of the shape of the shrink label obtained, (e) is an explanatory diagram when manufacturing a shrink label without a knob, and (f) is a schematic diagram of the shape of the shrink label obtained in (e). In (b), (d), and (f) of FIG. 5, the dimensions of the knob width (mm) and the label width (mm) when the label is folded are shown. As shown in FIG. 4, the die cutter 30 according to the present embodiment is a die cutter having a die roll 31 and a receiving roll 32.

  The die roll 31 has a linear blade portion 33a provided on the roll surface in parallel with the roll axial direction Z and a blade portion 33b for forming a knob connected to the linear blade portion 33a at the end portion 31a of the roll surface. And a cut cutter blade 34 for making a cut provided next to a connecting portion between the linear blade portion 33a and the knob forming blade portion 33b. In the label cutting cutter blade 33, the blade formed by connecting the linear blade portion 33a and the knob-forming blade portion 33b in a continuous manner cuts the shrink label 10 in the cut shape shown in FIG. Has a blade type. The cut cutter blade 34 is arranged so as not to be connected to the label cutting cutter blade 33. Thereby, in the shrink label 10, the cut edge 14 and the cut line 15 serving as a starting point for tearing can be separated. FIG. 4A shows a case where a pair of label cutting cutter blades 33 and cut cutter blades 34 are provided on the die roll 31, but when the diameter of the die roll 31 is increased, the axis of the die roll 31 is a symmetrical axis. As an alternative, two or more sets of label cutting cutter blades 33 and cut cutter blades 34 may be provided (not shown).

  The receiving roll 32 does not have a blade on its roll surface, and receives the label cutting cutter blade 33 and the cut cutter blade 34. When the cutting edge of the label cutting cutter blade 33 is pressed against the roll surface of the receiving roll 32, the shrink label 10 is cut. In addition, the cut 15 is formed by pressing the cutting edge of the cutting cutter blade 34 against the roll surface of the receiving roll 32.

  The die roll 31 and the receiving roll 32 are configured so that the surface of the die roll 31 and the surface of the receiving roll 32 do not sandwich the uncut shrink label 25 except where the label cutting cutter blade 33 and the cut cutter blade 34 are provided. Is attached. When using the die cutter 30, the die roll 31 and the receiving roll 32 are each rotated in the direction of the arrow shown in FIG. On the other hand, the uncut shrink label 25 is also sent to the die cutter 30. At this time, when the surface of the die roll 31 and the surface of the receiving roll 32 sandwich the uncut shrink label 25, the cut interval of the cut shrink label 10, that is, the interval between the upper end portion 11a and the lower end portion 11b (that is, The height of the label depends on the roll diameters of the die roll 31 and the receiving roll 32. When the cut interval is increased or decreased, the die roll 31 and the receiving roll 32 having different roll diameters must be prepared. However, if the surface of the die roll 31 and the surface of the receiving roll 32 do not sandwich the uncut shrink label 25, the feed speed of the uncut shrink label 25 and the peripheral speed of the die roll 31 and the receiving roll 32 are different. Therefore, it is possible to freely change the cut interval by adjusting the feed speed and the peripheral speed. Therefore, it is not necessary to prepare a plurality of types of die cutters, and equipment costs can be reduced.

  Further, the main body holding the die roll 31 and the receiving roll 32 is provided with a slide mechanism 35 that can move left and right in the vertical direction T with respect to the feeding direction S of the uncut shrink label 25 that has been tetra-folded.

  The length of the die roll 31 (distance between the end 31 a and the end 31 b) is preferably larger than the width of the uncut shrink label 25.

  Here, referring to FIG. 5, (1) when a shrink label with a knob is manufactured by the die cutter 30 according to this embodiment, (2) a shrink label with a knob is more cylindrical than in the case of (1). When manufacturing a shrink label having a small diameter, (3) a case of manufacturing a shrink label without a knob will be described.

  First, the case of (1) will be described. The uncut shrink label 25 is sent in a state of being brought close to the one end 31 a side of the die roll 31 so that the end with the cylinder pasting 16 is cut by the knob forming blade portion 33 b of the die roll 31. At this time, the end of the uncut shrink label 25 where the cylinder sticking 16 is not located is not located up to the other end 31 b of the die roll 31. Further, the cut cutter blade 34 forms the cut 15. In the case of (1), a shrink label having the shape of FIG. 5B is obtained.

  Next, the case of (2) will be described. As in the case of (1), the uncut shrink label 25 is brought close to the one end 31a side of the die roll 31 so that the end with the cylinder sticking 16 is cut by the knob forming blade portion 33b of the die roll 31. Sent by. At this time, the end of the uncut shrink label 25 where the cylinder sticking 16 is not located is not located up to the other end 31 b of the die roll 31. Further, the cut cutter blade 34 forms the cut 15. In the case of (2), although the width is smaller than the shrink label in the case of (1), the shrink label having the shape of FIG. 5D can be obtained without changing the device of the die cutter 30.

  Next, the case of (3) will be described. The uncut shrink label 25 is sent in a state slightly separated from the one end 31 a side of the die roll 31 so that the end on which the cylinder sticking 16 is present is not cut by the knob forming blade portion 33 b of the die roll 31. At this time, the end of the uncut shrink label 25 where the cylinder sticking 16 is not located is not located up to the other end 31 b of the die roll 31. Further, since the cutting cutter blade 34 does not act on the uncut shrink label 25, no cutting is formed. In the case of (3), without changing the device of the die cutter 30, a shrink label having the shape of FIG.

  Thus, by using the die cutter according to the present embodiment, the cutting process and the cut forming process can be performed simultaneously. That is, since the cutter blade for the shrink label and the cutter blade for the cut can be operated in series, the shrink label can be cut and the cut can be formed at the same time.

  As described above, the shrink label according to the present embodiment can be obtained. In the shrink label manufacturing method according to the present embodiment, both ends of the plastic film 21 are further processed before center sealing in FIG. It is preferable to further include a step of providing perforations. The perforations can be arranged on both sides of the cylinder when the cylinder is formed. The perforation can be provided by a known method, for example, a rotary type perforation blade.

  When the perforation is provided, the step of performing the tetra-folding is performed by unwinding the wound product (not shown) and feeding the uncut shrink label 24 while feeding the uncut shrink label 24 as shown in FIG. It is preferable that the uncut shrink label 24 be tetra-folded so that the fold line is located in a region between the two. The perforation 17b is a perforation located on the back side, and is in the same position as the perforation 17a in the folded state of FIG. Further, although not shown, tetra-folding of the uncut shrink label may be performed so that the fold line 23 is located in a region sandwiched between the tube pasting 16 and the perforation 17a. By providing the perforation 17, the starting point of the tear can be easily entered, and there is little possibility that the tear will be divided in the middle, and the knob 12 is not made larger than necessary. And the shrink label 10 of FIG.3 (b) is obtained by cut | disconnecting the uncut shrink label 25 tetra-folded like Fig.3 (a). When the crease 23 of the shrink label is developed, the shrink label 10 shown in FIG.

  Next, the shrink label (2nd form) which concerns on this embodiment is demonstrated using FIG. FIG. 6 is a diagram (corresponding to FIG. 1 (b)) showing the main part of the tearing portion in the shrink label (second embodiment) according to the present embodiment, where (a) is a line segment. The state before shrinking, (b) shows the state after shrinking in (a), (c) shows the state of the notch being U-shaped and before shrinking, and (d) shows the state after shrinking in (c). The shrink label 10 of the second form has a cylindrical shape, and is a shrink label that covers and is mounted on the body 2 of the container 1. The upper end portion 11 a of the cylinder is provided with a cut 40, and the cut is made. The bottom part 41 of 40 is provided with a cut 15 that is not connected to the edge of the upper end part 11a. The bottom 41 of the notch 40 is a peripheral portion of the tip portion (the bottom of the notch) of the notch 40, and refers to a peripheral portion on the center direction side of both ends of the cylindrical label, for example, as shown in FIG. The cut 40 can be deformed in addition to the line segment shown in FIG. 6A or the U character shown in FIG. After shrinking, as shown in FIGS. 6B and 6D, a tensile force acts in the circumferential direction of the cylinder, so that the notch 40 has a shape opened in the circumferential direction of the cylinder. Here, the portion sandwiched between the left and right cuts can be grasped as a protruding knob since the edge is above the reference height if the bottom of the cut is taken as the reference height. It can be considered by replacing it with a protruding knob of a form. Accordingly, the structure of the shrink label (second form) is the same as that of the shrink label (first form) that forms a protrusion-like knob except for the replacement portion. For example, although FIG. 6 illustrates the case where the cut is provided on the upper end side of the label, it may be provided on the lower end side or may be provided on both ends. The configurations such as cylinder pasting, perforation or folding line are the same as in the first embodiment. By adopting such a configuration, even in the second embodiment, the stress concentrates on the cut 40 at the time of tearing, and by providing the cut 15, the cut 15 can easily tear the shrink film 10 as a starting point of tearing. It becomes possible. Here, if the cut 15 is connected to the cut edge, the required strength cannot be obtained, and troubles such as peeling of the label during transportation of the container may occur. Also in the second embodiment, it is possible to prevent the required strength from being lowered by separating the cut edge 15 from the cut edge that is the starting point of tearing.

  In the shrink label (second form), the notch 40 and the edge of the upper end portion 11a are connected to each other, but the forming method thereof is a method of forming the notch 40 at the same time that the cylindrical end portion is cut with a cutter. Alternatively, the cylindrical end is first cut with a linear cutter such as a cutting machine to form the edge of the upper end 11a (at this time, the edge of the cylindrical lower end 11b formed one before is also formed) Thereafter, any of the methods of forming the cut 40 with a cut forming cutter may be used. In the former case, it is possible to apply a die cutter, while in the latter case, the same equipment as before until the process of cutting into a cylindrical shape of the label using a cutter that has been used conventionally, even if it is not a die cutter.・ Processing is possible in the process, and manufacturing can be handled by adding an additional process and an incision forming facility only in the process of making the notch.

  Alternatively, if the filling manufacturer that attaches the label cuts with a straight cutter and can be dealt with as usual, the cut 40 and the cut 15 form a folded uncut shrink label that is made by the material manufacturer. In the step of performing, it is preferable that it is provided in advance. Filling manufacturers who carry out label mounting can respond by using only a linear cutter cutter that they already have. Specifically, it is preferable to provide the cuts 40 and the cuts 15 in advance in any process until the uncut shrink label is rolled up before the cutting process. It is preferable to provide the cuts 40 and the cuts 15 in the step of providing perforations in the plastic film before the tube is stretched. Moreover, you may provide the cut | notch 40 and the cut 15 in the process which folds an uncut shrink label again, such as a tetra folding process. When the cut 40 and the cut 15 are provided in the uncut shrink label, the filling manufacturer makes the cut 40 and the cut so that the cut 40 is connected to the end 11 of the label and the cut 15 is not connected to the end 11 of the label. Cutting operation is performed after confirming the position 15.

  FIG. 7 is a diagram corresponding to FIG. 3B in the first embodiment (a diagram showing a crease state after being tetra-folded and a state after cutting). Also in the second embodiment, it is preferable to cut after tetra-folding, and to make the cut 40 and the cut 15 near the fold at the same time or in the subsequent process. By doing so, a pair of left and right cuts can be formed in the same process.

  Here, it shows in FIG. 8 about the die cutter which concerns on this embodiment which can advance a cutting process and a cut | interruption formation process simultaneously. A straight cutting blade and a cutting blade are provided on the roll surface. If the die cutter shown to Fig.8 (a) is prepared, it will become possible to advance by the method similarly to the shrink film of a 1st form.

  In order to study the knob shape of the shrink label, shrink labels were produced for various shapes shown in FIG. 9 and evaluated. FIG. 9 is a schematic diagram showing the shape of the evaluated knob. (A) is sample 1, (b) is sample 2, (c) is sample 3, (d) is sample 4, and (e) is a sample. Sample 5 is shown. Here, the sample 3 is the shrink label according to the present embodiment shown in FIG. On the other hand, Sample 1 (without knob), Sample 2 (without knob), Sample 4 and Sample 5 are comparative examples. Sample 1 has a configuration in which a vertical cut 36 is provided instead of a knob. Sample 2 has a form in which a semicircular cut 37 is provided. Furthermore, the sample 4 has a tab-like shape that is not a protrusion by providing a valley-shaped cut 39 having a semicircular bottom.

  Evaluation was performed as follows. That is, a shrink label having a knob shape shown in FIG. 9 was prepared and attached to a PET bottle by heat shrinking. Here, 24 pieces were prepared. It was evaluated whether or not the knob could be mounted without turning when the shrink label was thermally contracted by blowing hot air.

  The presence or absence of turning of the knob at the time of heat shrinkage was confirmed. As shown in FIG. 9 (a) as sample 1, FIG. 9 (b) as sample 2, and FIG. 9 (e) as sample 5 A turnover occurred. This is because the corners at both ends of the tip of the knob are both angular. In each shrink label of sample 3 in FIG. 9C and sample 4 in FIG. 9D, there was almost no turning.

  In addition, each shrink label of Fig.9 (a)-FIG.9 (e) after heat contraction is deform | transformed and mounted | worn by the shape pulled sideways in the figure unlike heat from the original shape for heat contraction. It was.

  Next, a shrink label having a knob shape shown in FIG. 9 was prepared and attached to a PET bottle by heat shrinking. Here, 5 males and 2 females were used as evaluators, and three were prepared for each evaluator. Then, for each of the five types of shrink labels (a) to (e) shown in FIG. The results are shown in Table 1. When “Ease of knobs” is at the same level as it is difficult to determine the superiority or inferiority of the ranking, the ranking was given.

  Next, with respect to the five types of shrink labels (a) to (e) shown in FIG. The results are shown in Table 2. In addition, when “Easiness of tearing” is at the same level as it is difficult to determine the superiority or inferiority of the ranking, the ranking was given.

  Referring to Tables 1 and 2, the sample 3 which is the shrink label according to the present embodiment shown in FIG. 9C has the highest rank in both “easy to hold the knob” and “easy to tear”. Excellent results. In Samples 1, 2, 4 and 5, either one of “easy to pick a knob” and “easy to tear” was in a good ranking, but the other was inferior. In particular, Sample 5 was easy to pick because of its knob, but it was difficult to tear because it had no cuts, and could not be torn well along the perforation.

It is the schematic which shows one form of the shrink label (1st form) which concerns on this embodiment which has coat | covered the bottle, (a) is a general view, (b) is the elements on larger scale of A. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic explaining the process of manufacturing a cylindrical uncut shrink label from a film, (a) is a figure explaining the process cut out from the film to the film for shrink labels, (b) is the film for shrink labels The figure which shows the process of the center seal | sticker of (c) is a figure which shows the process of the other form of (b). It is the schematic for demonstrating the tetra folding process performed before cutting a shrink label, (a) is a figure which shows tetra folding, (b) is a figure which shows the fold state after tetra folding. It is the schematic which shows one form of the die cutter which concerns on this embodiment, (a) is a front view, (b) is a side view. It is the schematic for demonstrating the usage method of the die cutter which concerns on this embodiment, (a) is explanatory drawing in the case of manufacturing a shrink label with a knob, (b) is the shrink label obtained by (a) (C) is a shrink label with a knob and is an explanatory diagram when manufacturing a shrink label having a smaller cylinder diameter than in the case of (a), (d) is a shrink label obtained in (c) (E) is explanatory drawing in the case of manufacturing a shrink label without a knob, (f) has shown the schematic diagram of the shape of the shrink label obtained by (e). In the shrink label (2nd form) which concerns on this embodiment, it is a figure corresponded in FIG.1 (b), (a) is a state where a notch is a line segment, and before shrinking, (b) is a shrink of (a). The rear state, (c) shows the state before the shrinkage with a U-shaped notch, and (d) shows the state after the shrinking of (c). It is a figure which shows the crease state after the tetra-folding of the shrink film which concerns on a 2nd form, and shows the state after cutting. It is the schematic which shows one form of the die cutter corresponding to the shrink film of a 2nd form, (a) is a front view, (b) is a side view. It is the schematic which shows the shape of the knob which evaluated, (a) shows the sample 1, (b) shows the sample 2, (c) shows the sample 3, (d) shows the sample 4, (e) shows the sample 5. .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container 2 Container body 10 Shrink label 11 End part 11a Upper end part 11b Lower end part 12 of a cylinder 12 Projection-like knob 13 Root part 14 where a knob rises Cut edge 15 Cut 15a Line segment part 15b Diagonal part 16 17, 17a, 17b Perforation 18 Recess 19 Area sandwiched between both right and left root parts 20 Winding product 21 of heat-shrinkable plastic film Cut and wound heat-shrinkable plastic film 22 Uncut shrink label Unrolled Shrink Label 25 Uncut Shrink Label 26 Uncut Shrink Label 26 Tetra 30 Die Cutter 31 Die Roll 31a End of Roll Surface 31b Other End of Roll Surface 32 Receiving Roll 33 Label Cutting Cutter Blade 33a Linear Blade 33b For knob formation Blade portion 34 Cut cutter blade 35 Slide mechanism 36 Vertical cut 37 Semi-circular cut 39 Valley cut 40 Cut 41 Cut bottom portion X Cylindrical axis direction Y Length of wound plastic film Z Roll axis direction S Not Cut shrink label feed direction T Motor perpendicular to uncut shrink label feed direction M Motor

Claims (13)

In the shrink label that has the shape of a cylinder and is mounted so as to cover the body of the container,
At least one of the upper end portion and the lower end portion of the cylinder has a parallel edge parallel to the circumferential direction of the cylinder and an inclined edge inclined with respect to the circumferential direction or an orthogonal edge orthogonal thereto. The shrink label characterized by providing the cut | interruption which is not connected with the edge of the said edge part in the one end side of this inclination edge or an orthogonal edge.   The inclined edge or the orthogonal edge is formed by providing a protruding knob on at least one of the upper end and the lower end of the cylinder, and the cut is formed by raising the knob from the end. The shrink label according to claim 1, wherein the shrink label is provided at a root portion.   The inclined edge or the orthogonal edge is formed by providing a cut at at least one of the upper end and the lower end of the cylinder, the cut is provided at the bottom of the cut, and the cut The shrink label according to claim 1, wherein the cut is provided in a left-right pair.   The cut is a so-called hem-shaped cut formed by a line segment extending in a direction parallel to the edge of the end and a hatched line extending from one end of the line segment toward the center of both ends of the cylinder. The shrink label according to claim 1, 2, or 3.   The line segment portion and the shaded portion are both linear, or the line segment portion is straight and the shaded portion is curved, or the line segment is curved and the shaded portion is The shrink label according to claim 4, wherein the shrink label is linear, or both the line segment part and the oblique line part are curved.   Two straight perforations extending in parallel to the cylinder axis direction are provided through a region sandwiched between the left and right root portions of the knob or a region sandwiched between both the bottom portions of the cut. The shrink label according to claim 2, 3, 4, or 5.   The cylinder sticking is located so that it may pass through the area | region pinched | interposed into the said root part of both the right and left of the said knob, or the area | region pinched | interposed into the bottom part of both of the right and left of the said notch. The shrink label according to 5 or 6. The plastic film is formed into a cylindrical shape with a cylinder attached by center sealing the plastic film so that the length direction of the wound plastic film coincides with the cylinder axis direction, and a fold line is adjacent to the cylinder attachment. Forming a folded uncut shrink label such that
Cutting the uncut shrink label so that a protruding knob is formed on the fold line;
A step of providing a cut that is not connected to the cut edge at the root where the knob rises from the end of the label formed by being cut;
The manufacturing method of the shrink label characterized by having. The plastic film is formed into a cylindrical shape with a cylinder attached by center sealing the plastic film so that the length direction of the wound plastic film coincides with the cylinder axis direction, and a fold line is adjacent to the cylinder attachment. Forming a folded uncut shrink label such that
Cutting the uncut shrink label and providing an end of the label;
Providing a cut to connect with the cut edge;
Providing a cut at the bottom of the cut that is not connected to the cut edge;
The manufacturing method of the shrink label characterized by having. The step of forming the folded uncut shrink label comprises:
A wound product of an uncut shrink label in which a cylindrical body to which the plastic film is center-sealed to give a cylinder is wound in a roll shape so that the length direction of the wound plastic film coincides with the cylinder axis direction The process of preparing
While unwinding the wound product, the step of folding the uncut shrink label again so that a new fold line is located next to the cylinder pasting,
10. A method for producing a shrink label according to claim 8 or 9, wherein   The method for manufacturing a shrink label according to claim 10, wherein, in the step of folding the uncut shrink label again, the new fold line is formed by tetra-folding. Before the center seal, further comprising the step of providing perforations on both sides of the plastic film,
In the tetra-folding step, the uncut shrink label is tetra-folded so that the fold line is located in a region sandwiched between the cylinder pasting and the perforation while unwinding the wound product. It is a process, The manufacturing method of the shrink label of Claim 11 characterized by the above-mentioned. A die cutter having a die roll and a receiving roll for use in the method for producing a shrink label according to claim 8, 10, 11 or 12,
The die roll is a label comprising a linear blade portion provided on the roll surface in parallel with the roll axis direction, and an edge portion for forming a knob connected to the linear blade portion at the end of the roll surface. A cutter blade for cutting according to claim 8 provided next to a connecting portion between the cutter blade for cutting and the linear blade portion and the blade portion for forming the knob,
The die roll and the receiving roll are arranged so that the surface of the die roll and the surface of the receiving roll do not sandwich the uncut shrink label except where the label cutting cutter blade and the cut cutter blade are provided. Installed,
A die cutter, characterized in that a slide mechanism capable of moving to the right and left in a direction perpendicular to a feeding direction of the uncut shrink label is provided on a main body that holds the die roll and the receiving roll.

Images