JP2010122244A - In-mold continuous label form, and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and surely take out and supply in-mold labels one by one successively even if the in-mold labels are made thin. <P>SOLUTION: An in-mold continuous label form is used wherein a plurality of in-mold labels 20 are temporarily stuck on a long holding sheet 10 successively by electrostatic adsorption or the like. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an in-mold label continuous body and a method for manufacturing the same, and in particular, even when the thickness of the in-mold label is reduced, the in-mold label can be easily and reliably supplied one by one. It is characterized by the points.

  Conventionally, labels with various indications have been attached to the outer peripheral surfaces of various plastic containers.

  And in pasting the label on the outer peripheral surface of the plastic container in this way, in addition to pasting the label provided with the adhesive on the outer peripheral surface of the molded plastic container by peeling it off from the release sheet in order, in recent years Holds the in-mold label in the molding die, injects the plastic container molding material into the molding die, and simultaneously attaches the in-mold label to the outer peripheral surface of the plastic container. To be done.

  Here, in order to hold such an in-mold label in a molding die, in general, a plurality of in-mold labels are aligned and laminated, and thus a plurality of in-mold labels are formed. The in-mold labels are sucked and separated one by one from the laminated in-mold label laminate by a suction device, and the separated in-mold labels are guided and held in a molding die.

  However, in the in-mold label laminate in which a plurality of in-mold labels are laminated as described above, the in-mold labels are in close contact with each other. When the in-mold label is sucked and separated by the apparatus, two or more in-mold labels that are in close contact with each other are sucked and taken out together, and the in-mold label taken out in this way is used as a molding die. There is a problem that defective products occur due to being held at different positions.

  For this reason, conventionally, as disclosed in Patent Document 1, an emboss is provided on a part of the surface of the in-mold label, and the contact area between the surface of the in-mold label and the molding surface of the molding die is increased. In addition to preventing the surface of the in-mold label from sticking to the molding surface of the molding die, the in-mold labels are in close contact with each other, and two or more in-mold labels are sucked together and removed. There are proposals to prevent this.

  However, in the one disclosed in Patent Document 1, the embossing provided on a part of the surface of the in-mold label is provided at the same position in each in-mold label. The in-mold labels are further brought into close contact with each other, and there is a problem that two or more in-mold labels are sucked and taken out together.

Further, in recent years, in order to reduce the material cost of the in-mold label as described above, the thickness of the in-mold label has been reduced. When the thickness is reduced, for example, when the thickness of the in-mold label is 40 μm or less, there has been a problem that the work of aligning and laminating a plurality of in-mold labels as described above is very troublesome. .
JP 2003-98968 A

  An object of the present invention is to solve the above-mentioned various problems in the case where the in-mold labels are separated one by one from a plurality of in-mold labels and sequentially taken out.

  That is, in the present invention, it is possible to easily and surely supply the in-mold labels one by one as compared with the in-mold label laminated body in which a plurality of in-mold labels are laminated. Even when the thickness of the label is reduced, it is an object to be able to easily and reliably supply in-mold labels one by one.

  In the continuous in-mold label in this invention, a plurality of in-mold labels are temporarily attached on a long holding sheet in order to solve the above problems.

  Here, in temporarily attaching a plurality of in-mold labels on a long holding sheet as described above, various methods can be used, for example, on a long holding sheet. The in-mold label can be electrostatically adsorbed, the in-mold label can be temporarily attached to the long holding sheet via a low-viscosity liquid, or the in-mold label can be attached to the long holding sheet. The mold label can be partially adhered. However, the in-mold label temporarily attached on the long holding sheet as described above can be easily peeled off from the holding sheet by a suction device or the like, and an adhesive or the like remains on the in-mold label. In order to prevent this, the in-mold label is electrostatically adsorbed on the long holding sheet, or the in-mold is put on the long holding sheet via a low-viscosity liquid. It is preferable to temporarily attach the label for use.

  Here, when the in-mold label is electrostatically attracted and temporarily attached onto the long holding sheet as described above, the surface of the in-mold label electrostatically adsorbed to the long holding sheet and It is preferable to apply an antistatic agent to the opposite surface and prevent the opposite surface from being electrostatically adsorbed to other parts.

  In addition, when the in-mold label is temporarily attached onto the long holding sheet as described above via a low-viscosity liquid, the low-viscosity liquid has a viscosity η at 20 ° C. of 4.0 mPas or less. It is preferably a liquid, more preferably a liquid of 2.4 mPas or less, and for example, water or alcohol is preferably used.

  In addition, in order to facilitate storage and handling of the in-mold label continuous body in which a plurality of in-mold labels are temporarily attached on the long holding sheet as described above, this in-mold label continuous body It is preferable to wind the wire. In the case where the in-mold label is electrostatically adsorbed on the long holding sheet as described above, an antistatic agent is applied to the surface opposite to the adsorption surface of the in-mold label as described above. When the in-mold label continuous body is wound as described above, the surface opposite to the suction surface of the in-mold label is attracted to the surface opposite to the wound holding sheet. Is prevented.

  Here, in producing a continuous in-mold label in which a plurality of in-mold labels are electrostatically adsorbed on a long holding sheet as described above, the long holding sheet is conveyed. The surface of the long holding sheet and / or the surface of the in-mold label on which the in-mold label is temporarily attached is charged in the middle of guiding the in-mold label to the temporary attachment position, It is possible to sequentially supply the in-mold labels to the surface of the holding sheet so that the in-mold labels are sequentially electrostatically adsorbed onto the long holding sheet.

  In addition, when manufacturing a continuous in-mold label in which a plurality of in-mold labels are temporarily attached to a long holding sheet via a low-viscosity liquid as described above, the long holding In the middle of transporting the sheet to the position where the in-mold label is temporarily attached, a low-viscosity liquid is applied to the surface of the long holding sheet and / or the surface of the in-mold label on which the in-mold label is temporarily attached. After that, the in-mold labels are sequentially supplied to the surface of the long holding sheet, and the in-mold labels are sequentially placed on the long holding sheet via the low-viscosity liquid. It can be made to wear.

  In the in-mold label continuous body according to the present invention, since a plurality of in-mold labels are temporarily attached onto the long holding sheet as described above, the in-mold label is temporarily attached to the holding sheet. The labels can be taken out from the holding sheet in order.

  For this reason, in the in-mold label continuous body of the present invention, the stacked in-mold labels are in close contact with each other as in the conventional in-mold label laminate, and the in-mold label is sucked. When separating the two in-mold labels, the two in-mold labels attached to the long holding sheet in order are not sequentially sucked and taken out together. By separating from the holding sheet, it is possible to easily and reliably remove the in-mold labels one by one.

  In addition, in the in-mold label continuous body of the present invention, it is not necessary to perform the work of laminating and aligning a plurality of in-mold labels unlike the conventional in-mold label laminated body. Even when the thickness of the label is reduced, the work of aligning and laminating a plurality of in-mold labels as before is not very troublesome, and the thickness is 40 μm or less, and further 30 μm or less. Even for in-mold labels, the in-mold labels, which are temporarily attached to the long holding sheet as described above, are peeled off from the holding sheet one by one, so that the in-mold labels are one by one. Can be easily and reliably removed.

  In the in-mold label continuous body of the present invention, when temporarily mounting a plurality of in-mold labels on a long holding sheet, the in-mold label is electrostatically attracted to the long holding sheet. If the in-mold label is temporarily attached to the long holding sheet via the low-viscosity liquid, the in-mold element temporarily attached to the long holding sheet is used. The label can be easily peeled off from the holding sheet by a suction device or the like, and no adhesive or the like remains on the in-mold label.

  In addition, when the in-mold label is electrostatically adsorbed on the long holding sheet as described above, the in-mold label is electrostatically adsorbed on the long holding sheet. When an antistatic agent is applied, the opposite surface is prevented from being electrostatically adsorbed to other parts and the like. Prevents the surface opposite to the label's suction surface from being sucked by the opposite surface of the rolled holding sheet, the in-mold label from being displaced, and the in-mold label from being peeled off the holding sheet. Is done.

  Further, in manufacturing a continuous in-mold label in which a plurality of in-mold labels are electrostatically adsorbed on a long holding sheet as described above, a long holding sheet is used as described above. In the middle of transporting and guiding the in-mold label to the position for temporary attachment, the surface of the long holding sheet and / or the surface of the in-mold label for temporarily attaching the in-mold label is charged and then the long When the in-mold labels are sequentially supplied to the surface of the long holding sheet, and the in-mold labels are sequentially electrostatically adsorbed on the long holding sheet, the long holding sheet In addition, it is possible to easily manufacture a continuous in-mold label in which a plurality of in-mold labels are electrostatically adsorbed.

  Further, in manufacturing a continuous in-mold label in which a plurality of in-mold labels are temporarily attached to a long holding sheet via a low viscosity liquid as described above, a long holding sheet is used. A low-viscosity liquid was applied to the surface of the long holding sheet and / or the surface of the in-mold label on which the in-mold label was temporarily attached while being transported to the position where the in-mold label was temporarily attached. After that, in-mold labels are sequentially supplied onto the surface of the long holding sheet, and the in-mold labels are temporarily attached onto the long holding sheet in sequence via the low-viscosity liquid. By doing so, it becomes possible to easily manufacture a continuous in-mold label in which a plurality of in-mold labels are temporarily attached onto a long holding sheet via a low viscosity liquid.

  Next, the in-mold label continuous body and the manufacturing method thereof according to the embodiment of the present invention will be specifically described with reference to the accompanying drawings. In addition, the in-mold label continuous body and the manufacturing method thereof according to the present invention are not particularly limited to those shown in the following embodiments, and can be appropriately changed and implemented without departing from the scope of the invention. is there.

  In the in-mold label continuous body in this embodiment, as shown in FIG. 1, a plurality of in-mold labels 20 are provided on a long holding sheet 10 made of a resin such as polyethylene terephthalate (PET). In order to make a temporary attachment through the required intervals.

  And in the in-mold label continuous body in this embodiment, in temporarily attaching the in-mold label 20 on the holding sheet 10, the printing part 22 of the label base material 21 in the in-mold label 20 is held as described above. The sheet 10 was electrostatically adsorbed and temporarily attached, and an antistatic agent 23 was applied to the surface opposite to the printing unit 22.

  Here, as a material of the label substrate 21 in the in-mold label 20, a synthetic resin such as polypropylene (PP) or polystyrene (PS) generally used for the label is used. Various surfactants can be used as the antistatic agent 23 applied to the surface opposite to the printing unit 22.

  When the antistatic agent 23 is applied to the surface of the label base 21 opposite to the printing part 22 as described above, as shown in FIG. 3, the in-mold label continuous body is retained when wound. The surface opposite to the printing portion 22 of the in-mold label 20 electrostatically adsorbed on the sheet 10 comes into contact with the back surface of the holding sheet 10 wound thereon. Since the antistatic agent 23 is applied to the surface opposite to the printing unit 22, the surface opposite to the printing unit 22 is prevented from being electrostatically attracted to the back surface of the holding sheet 10 wound thereon. The

  Therefore, when the in-mold label continuous body wound as described above is rewound, the in-mold label 20 that is electrostatically adsorbed and temporarily attached onto the holding sheet 10 is attached to the back surface of the holding sheet 10. Or the in-mold label 20 is prevented from being displaced, or the in-mold label 20 is peeled off from the holding sheet 10.

  Moreover, when the plurality of in-mold labels 20 are electrostatically adsorbed onto the long holding sheet 10 and temporarily attached as in the in-mold label continuous body, the in-mold label 20 Even when the thickness is very thin, the in-mold label 20 can be easily peeled and removed one by one from the holding sheet 10 one by one. There is no need to perform the troublesome work of laminating a plurality of labels 20, and the in-mold labels 20 are brought into close contact with each other, so that two or more in-mold labels 20 are not taken out together.

  Then, the in-mold labels 20 thus peeled off one by one in this order are sequentially held in a molding die (not shown), and as shown in FIG. When the in-mold label 20 is affixed to the outer peripheral surface 1a of the plastic container 1 simultaneously with the molding of the in-mold 1, the in-mold labels 20 are appropriately affixed to the outer peripheral surface 1a of the plastic container 1 one by one. Thus, unlike the conventional case, there is no possibility that two or more in-mold labels 20 are led together into a molding die and defective products are generated.

  Further, in manufacturing the continuous in-mold label as described above, in this embodiment, as shown in FIG. 5, a printing unit 22 is provided at a predetermined position on one side, while the printing unit 22 is opposite to the printing unit 22. A long sheet-like in-mold label base material 20A provided with an antistatic agent 23 on its surface was used.

  And in the state which turned down the printing part 22 of 20 A of said label base materials for in-molds, this label base material 20A for in-molds is placed between the cutter roller 2 and the anvil roller 3 as shown in FIG. On the other hand, on the lower side of the in-mold label substrate 20A, a charging device 4 is provided in the middle of guiding the long holding sheet 10 between the cutter roller 2 and the anvil roller 3. 4, the upper surface of the holding sheet 10 in contact with the in-mold label base material 20 </ b> A is charged, and the in-mold label base material 20 </ b> A is laminated on the holding sheet 10 with the upper surface charged in this way. In this state, it is guided between the cutter roller 2 and the anvil roller 3.

  Then, the in-mold label substrate 20A is cut into the in-mold label 20 having a predetermined shape by the cutter roller 2, and the in-mold label 20 thus cut is charged as described above. The in-mold label 20 is temporarily attached to the holding sheet 10 by temporarily adsorbing the in-mold label 20 on the holding sheet 10 in this manner. On the other hand, the residue 20B of the label substrate for in-mold after the in-mold label 20 was cut was separated from the holding sheet 10 by the raising roller 5.

  In this way, it was possible to easily manufacture an in-mold label continuous body in which a plurality of in-mold labels 20 were electrostatically adsorbed onto the long holding sheet 10 and temporarily attached.

  In the in-mold label continuous body in this embodiment, the charging device 4 charges the upper surface of the holding sheet 10 in contact with the in-mold label base material 20A. It is also possible to charge the lower surface of the in-mold label substrate 20A that comes into contact, or to charge both the upper surface of the holding sheet 10 and the lower surface of the in-mold label substrate 20A.

  Further, in the in-mold label continuous body in this embodiment, the in-mold label 20 is temporarily attached by electrostatically adsorbing the in-mold label 20 on the long holding sheet 10. Is temporarily attached to the holding sheet 10 as shown in FIG. 7. However, as shown in FIG. It is also possible to make it adsorb and temporarily attach, and to apply the antistatic agent 23 on the printing unit 22 described above.

  Further, in the in-mold label continuous body in this embodiment, the in-mold label 20 is electrostatically adsorbed on the long holding sheet 10 to be temporarily attached. The method of temporarily attaching the in-mold label 20 on the substrate 10 is not limited to such a method.

  For example, as shown in FIG. 8, the in-mold label 20 in which the printing unit 22 is provided on the label base material 21 is temporarily attached to the long holding sheet 10 via the low-viscosity liquid 30. It is also possible to do. Here, the low-viscosity liquid 30 is preferably a liquid having a viscosity η at 20 ° C. of 4.0 mPas or less, more preferably a liquid of 2.4 mPas or less, and water or alcohol. Etc. are preferably used.

  Here, in manufacturing a continuous in-mold label in which a plurality of in-mold labels 20 are temporarily attached to the long holding sheet 10 via the low-viscosity liquid 30, Using a long sheet-like in-mold label substrate 20A provided with a printing unit 22 at a predetermined position, as shown in FIG. 9, the printing unit 22 of the in-mold label substrate 20A is moved downward. The low-viscosity liquid 30 is applied to the lower surface of the in-mold label base material 20A provided with the printing unit 22 by the liquid application device 6, and then the in-mold label base material 20A is applied to the cutter roller 2 and the anvil roller. 3 and the above-described cutter roller 2 and anvil roller by moving the long holding sheet 10 below the in-mold label base material 20A. And in between the cutter roller 2 and the anvil roller 3 in a state where the above-mentioned in-mold label base material 20 </ b> A having the low-viscosity liquid 30 applied on the lower surface is laminated on the holding sheet 10. I did it.

  Then, the in-mold label base material 20A was cut into the in-mold label 20 having a predetermined shape by the cutter roller 2, and the in-mold label 20 thus cut was applied to the lower surface thereof. The in-mold label 20 in which the low-viscosity liquid 30 is applied on the lower surface in this manner is temporarily attached onto the holding sheet 10 with the low-viscosity liquid 30, and the in-mold label 20 is temporarily attached onto the holding sheet 10. While winding up the mold label continuous body, the residue 20B of the in-mold label base material after the in-mold label 20 was cut was separated from the holding sheet 10 by the lift roller 5.

  In this way, a continuous in-mold label in which a plurality of in-mold labels 20 were temporarily attached to the long holding sheet 10 with the low-viscosity liquid 30 could be easily manufactured.

  In the example shown in FIG. 9, the low-viscosity liquid 30 is applied to the lower surface of the in-mold label base material 20 </ b> A provided with the printing unit 22 by the liquid application device 6. The low-viscosity liquid 30 may be applied to the upper surface of the substrate 10, or the low-viscosity liquid 30 may be applied to both the lower surface of the in-mold label base material 20A and the upper surface of the holding sheet 10. Is possible.

  In the example shown in FIG. 8, the surface of the in-mold label 20 provided with the printing unit 22 is temporarily attached to the long holding sheet 10 via the low-viscosity liquid 30. It is also possible to temporarily attach the surface opposite to the surface of the in-mold label 20 provided with the printing unit 22 on the long holding sheet 10 via the low viscosity liquid 30.

  In the above-described embodiment, the in-mold label base material 20A is cut into the in-mold label 20 having a predetermined shape, and the in-mold label 20 thus cut is placed on the holding sheet 10. Although temporarily attached in order, it is also possible to supply the in-mold labels 20 prepared in advance one by one on the holding sheet 10 for temporary attachment. In this way, when the in-mold labels 20 are supplied onto the holding sheet 10 one by one and temporarily attached, the in-mold labels 20 may be charged or the in-mold labels 20 may be charged as described above. It is preferable to apply such a low viscosity liquid 30.

  Further, when the in-mold label 20 is temporarily attached on the holding sheet 10, an adhesive (not shown) having low adhesiveness is partially applied on the holding sheet 10. The surface of the in-mold label 20 to be temporarily attached onto the holding sheet 10 is highly peelable so that the in-mold label 20 is temporarily attached, and the adhesive is not attached to the in-mold label 20. It is also possible to provide a layer (not shown).

In the in-mold label continuous body according to one embodiment of the present invention, a plurality of in-mold labels are electrostatically adsorbed onto a long holding sheet and temporarily attached to the in-mold label continuous body. It is the schematic plan view which showed. It is a schematic side view of the label continuous body for in-mold which concerns on said embodiment. It is a partial explanatory view in the state where the in-mold label continuum concerning the above-mentioned embodiment was wound. It is the schematic front view which showed the state of the plastic container which affixed on the outer peripheral surface at the time of shaping | molding of a plastic container the label for in-molds peeled and taken out from the continuous label body for in-molds concerning said embodiment. It is a schematic side view of the long sheet-like in-mold label base material used for manufacturing the in-mold label continuous body which concerns on said embodiment. It is the schematic explanatory drawing which showed the state which manufactures the label continuous body for in-mold which concerns on said embodiment. In the in-mold label continuous body according to the embodiment, it is a schematic side view of a modified example in which the surface of the in-mold label that is electrostatically adsorbed onto a long holding sheet and temporarily attached is changed. In the modified example of the in-mold label continuous body according to the embodiment of the present invention, a continuous in-mold label in which a plurality of in-mold labels are temporarily attached to a long holding sheet via a low-viscosity liquid. It is the schematic side view which showed the body. It is the schematic explanatory drawing which showed the state which manufactures the label continuous body for in-molds which concerns on said modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plastic container 1a Peripheral surface 2 Cutter roller 3 Anvil roller 4 Charging device 5 Raising roller 6 Liquid application device 10 Holding sheet 20 Label for in-mold 20A Label substrate for in-mold 20B Waste of label substrate for in-mold 21 Label group Material 22 Printing surface 23 Antistatic agent 30 Low viscosity liquid

Claims (7)

  A continuous in-mold label, wherein a plurality of in-mold labels are temporarily attached on a long holding sheet.   The in-mold label continuous body according to claim 1, wherein the in-mold label is electrostatically adsorbed on the long holding sheet.   The in-mold label continuous body according to claim 2, wherein an antistatic agent is applied to a surface opposite to the surface of the in-mold label that is electrostatically adsorbed on the long holding sheet. An in-mold label continuum characterized by the above.   The in-mold label continuous body according to claim 1, wherein the in-mold label is temporarily attached to the long holding sheet via a low-viscosity liquid. Continuum.   An in-mold label continuous body, wherein the in-mold label continuous body according to claim 1 is wound.   In the middle of conveying the long holding sheet to the position where the in-mold label is temporarily attached, the surface of the long holding sheet and / or the surface of the in-mold label on which the in-mold label is temporarily attached After charging, the in-mold labels are sequentially supplied to the surface of the long holding sheet, and the in-mold labels are sequentially electrostatically adsorbed on the long holding sheet. A method for producing a continuous label for in-mold.   In the middle of conveying the long holding sheet to the position where the in-mold label is temporarily attached, on the surface of the long holding sheet and / or the surface of the in-mold label on which the in-mold label is temporarily attached After applying the low-viscosity liquid, in-mold labels are sequentially supplied onto the surface of the long holding sheet, and the in-mold label is placed on the long holding sheet via the low-viscosity liquid. A method for producing a continuous label for in-mold, wherein the continuous label is temporarily attached.

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