JP2008102256A - Concealed label - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concealed label having an unsealing discriminating function at a low cost. <P>SOLUTION: This concealed label forms a concealing layer 12 on the surface of a base material 11 and forms a strong adhesive layer 13, by applying a strong binder on the back of the base material 11 and connects a strong adhesive section 14, having the strong adhesive strength of the strong adhesive layer 13 and a weak adhesive section 15 made less adhesive, by partly printing a ground pattern on the adhesive surface of the strong adhesive layer 13, in a manner that is free of separating from each other, along the perforated line 16; and further, the strong adhesive section 14 has hard-to-peel properties, and the weak adhesive section 15 easy for peeling with respect to the object for adhesiveness. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a concealment label having a function of concealing information by being attached to an adherend and a function of discriminating that the information is peeled off from the adherend and opened.

  2. Description of the Related Art Conventionally, for example, when mailing a mail in which personal information is described, a label having a concealing function, that is, a so-called concealment label is attached to protect the personal information. However, most of such concealment labels have an adhesive force that can be applied again even after being peeled off. For this reason, even if a third party peels off the concealment label in an attempt to steal personal information and then reopens it, the recipient cannot determine that it has been opened. There was a problem that the personal information was not leaked.

  On the other hand, a pressure-sensitive adhesive label that can be discriminated from being peeled has also been proposed (see, for example, Patent Document 1 below). This pressure-sensitive adhesive label is a colored transparent plastic film made of a laminated base material of two or more films having different hues or colors, and when peeled after being attached to an adherend, delamination occurs between the laminated base materials. When an air layer is formed and reattached, a pattern with a different hue or color tone is displayed so that it can be determined that it has been opened. However, a label having an opening discrimination function such as this pressure-sensitive adhesive label has a structure in which a plurality of films, a pseudo-adhesive layer, and the like are laminated in addition to the base material and the pressure-sensitive adhesive. There was a problem that.

JP 2003-41215 A

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a concealment label having an opening discrimination function that can be manufactured at low cost.

  In order to achieve the above object, the concealment label of the present invention is provided with a strong pressure-sensitive adhesive layer in which a strong pressure-sensitive adhesive is applied to the back surface of a label base material having concealability, and the adhesive strength of the strong pressure-sensitive adhesive layer. And a weakly bonded part, the adhesive strength of which is adjusted by applying a tint block print on the adhesive surface of the strong pressure-sensitive adhesive layer, is connected in a detachable manner through a perforation. It is set to the adhesive force which does not have peelability with respect to a to-be-adhered body, The said weak adhesion part is set to the adhesive force which has peelability with respect to the said adherend.

When the concealment label is attached to the adherend and peeled off, whether it can be peeled off from the adherend is determined by the relationship between the surface strength of the adherend and the adhesive strength of the concealment label. Therefore, specific criteria for the strongly bonded portion and the weakly bonded portion are shown. For the strongly bonded portion, the adhesive force measured by a 180 ° peeling method in accordance with JIS Z0237 is set within a range of 1 to 20 N / 25 mm. , And JAPAN TAPPI paper pulp test method no. The surface strength measured by 1 is not peelable with respect to paper of 14 to 20, and the area of the white portion of the tint block printing is set to 4 × 10 ⁻⁶ m ² or less for the weakly bonded portion. It shall be. The grounds set within this numerical range will be described in detail later.

  According to such a configuration, the strongly bonded portion does not have releasability when attached to an adherend such as a postcard. On the other hand, the weakly bonded portion can be peeled cleanly without causing paper damage even after being attached to the same adherend and peeled off. If the white area is wider than the above numerical value, the adhesive strength of the weakly bonded portion becomes too strong, and the paper surface breaks when the weakly bonded portion is peeled off after mailing.

  Further, in the concealment label of the present invention, since the strong adhesive portion is left on the adherend when the perforation is cut off, considering the suitability when the information of the adherend is mechanically read by the OCR device. The width of the strongly bonded portion is set within a range of 3 to 8 mm, and the width of the portion remaining on the adherend after cutting off the weakly bonded portion is set within a range of 3 to 10 mm. preferable.

  In the concealing label of the present invention, the weakly bonded portion can be printed with ultraviolet curable ink. In this case, from the viewpoint of ensuring releasability, the thickness of the printed portion is set to 3 μm or more. It is good to be.

  Moreover, in order to make it easy to separate the weakly bonded portion from the perforated portion, the concealing label of the present invention is characterized in that an inclination angle of 5 ° or more is provided at the peeling start position of the weakly bonded portion.

  Furthermore, the concealment label of the present invention is characterized in that the width of the uncut portion of the perforation is set within a range of 0.05 to 0.4 mm. If the width of the non-cut portion is less than 0.05 mm, it is impossible to keep the strong adhesive portion and the weak adhesive portion connected to each other. Conversely, if the width exceeds 0.4 mm, it becomes difficult to cut the perforation. It is.

  According to the concealment label of the present invention, it is impossible to peel off the strong adhesive portion and the weak adhesive portion together without cutting the perforation. Even so, since the trace of the perforation remains on the label, it can be determined that the label has been opened. Even if the perforations are peeled off without being cut, the adherend is destroyed at the strongly bonded portion, leaving an open trace on the adherend. Therefore, it is possible to prevent the third party from peeping or tampering with personal information by removing the concealment label, and to protect personal information with certainty.

  In addition, according to the present invention, a concealing layer is printed on the surface of the label base material, and a strong adhesion portion and a weak adhesion portion are formed by adjusting the adhesion force by applying a tint block print on the adhesion surface. It is possible to manufacture by simply printing a commercially available strong adhesive label, and it is possible to manufacture a concealment label having an opening discrimination function at a very low cost.

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

  1 is an external view of the concealment label of the present invention, FIG. 2 is a rear view of the label, FIGS. 3 and 4 are partially enlarged views of the label, and FIG. 5 is an explanatory view showing a method of using the label.

  First, the structure of the concealment label of this invention is demonstrated.

<Configuration of concealment label>
As shown in FIG. 1, this concealment label 10 is detachably attached to a release paper 30. When used, the concealment label 10 peeled off from the release paper 30 is attached to an adherend mainly made of paper such as a postcard. In addition, it has a function to hide information. Moreover, when the cover label 10 is peeled off from a postcard or the like and opened, the function of determining that the cover is opened is provided.

  The concealment label 10 has a structure in which a concealment layer 12 is provided on the surface of a label base material 11 and a strong adhesive layer 13 made of a strong adhesive is provided on the back surface of the label base material 11.

  As the label substrate 11, various papers such as high-quality paper, art paper, and coated paper, and resin films such as polyester film and polypropylene film are used, and the size is determined according to the information entry column of the postcard. Moreover, in order to make it easy to peel off the concealment label 10, a peeling opening is provided in which the upper end of the label base material 11 protrudes in a trapezoidal shape.

  The concealing layer 12 is a permeation-preventing process for concealing the label substrate 11, and the surface of the label substrate 11 is subjected to solid printing or tint block printing with a dark color ink such as silver, black, or dark blue. It is formed by. Further, instead of printing with dark color ink, a structure in which a dark colored colored film is adhered to the label base material 11 or when the label base material 11 is a resin film, metal vapor deposition such as aluminum foil is formed thereon. The structure which gives can also be employ | adopted. The configuration of the masking layer 12 is not limited as long as it does not allow the back side of the label substrate 11 to be seen through.

  As shown in FIG. 2, the strong pressure-sensitive adhesive layer 13 is configured by applying a strong pressure-sensitive adhesive to the back surface of the label substrate 11. As the adhesive, an emulsion-type acrylic adhesive is suitable, but if the label substrate 11 is a resin film, a solvent-type acrylic, rubber-based (natural rubber, SBR, butyl rubber), hot-melt, silicone-based Various adhesives such as can be used. However, the pressure-sensitive adhesive is of a strong pressure-sensitive adhesive type that does not have releasability, and it needs to have an adhesive strength that causes destruction of the paper when peeled off after being attached to an adherend such as a postcard. is there. If a commercially available label product is used, “Erière Tuck” (base material: high-quality paper S55, adhesive: general strong viscosity, release paper: SBG85S (blue glassine 85), manufactured by Daio Paper Co., Ltd.) is mentioned as an example. .

  Moreover, the adhesive force of the strong pressure-sensitive adhesive layer 13 is set within a range of 1 to 20 N / 25 mm as an adhesive force measured by a 180 ° peeling method (peeling speed 300 mm / min) in accordance with JIS Z0237 as a specific reference. In addition, a paper pulp test method of Japan TAPPI (Paper and Pulp Technology Association) standard, Standard No. The surface strength measured by 1 (paper and paperboard-wax surface strength test method) needs to be set to an adhesive force that does not have peelability to paper of 14 to 20.

  On the back surface of the label base material 11, a strong adhesive portion 14 having an adhesive force of the strong pressure-sensitive adhesive layer 13, and a weak adhesive portion 15 having a surface pattern printed on the adhesive surface of the strong pressure-sensitive adhesive layer 13 to adjust the adhesive force, Are connected through a perforation 16 so as to be separable.

  When the perforation 16 is cut off, the strong adhesion portion 14 is left on the adherend such as a postcard. For this reason, the width W2 of the portion remaining on the postcard is set within a range of 3 to 10 mm as shown in FIG. 4 so as not to affect the feed suitability when the postcard information is mechanically read by the OCR device. Has been. Further, the width W3 of the portion where the strong adhesive is exposed in the strong adhesion portion 14 is set to a width of 3 to 8 mm, which is narrower than that. If the width is within this range, it can be re-applied within 5 seconds immediately after being applied to the postcard or within about 5 seconds after being applied, and it can be applied to a postal sorting machine that performs delivery classification after mailing. When the pressure is applied, it adheres completely, and if it is peeled off, the postcard will be destroyed.

  The weak adhesive portion 15 is formed by forming a printed layer 21 on which a grid-like background pattern is printed with ultraviolet curable ink on a release paper 30 and then laminating and laminating a label substrate 11 having a strong adhesive layer 13 thereon. Thus, the printing layer 21 is transferred onto the strong pressure-sensitive adhesive layer 13. As a commercially available ultraviolet curable ink, for example, “TOKA UV NVR Medium” (manufactured by T & K TOKA) can be used.

The adhesive strength of the weakly bonded portion 15 is set to such an extent that it does not break down on the paper surface even after being attached to and peeled off from an adherend such as a postcard. Specifically, the area of the white portion 22 of the tint block printing needs to be set to 4 × 10 ⁻⁶ m ² or less. This is because if there are more white portions 22, the adhesive force becomes too strong, and when the weakly bonded portion 15 is peeled off after mailing, the paper surface breaks down and information cannot be read. However, the area of the white portion here is that each area of the white portion is set to the above value.

  From the viewpoint of ensuring releasability, the film thickness of the printing layer 21 made of ultraviolet curable ink is preferably 3 μm or more. In addition, as a method of measuring the thickness of the ink, the non-printed surface on the same label was measured at any three points with a micrometer, the average value was taken as the reference point a, and the tint block printed surface was measured with a micrometer. Three arbitrary points were measured, and the average value was defined as a measurement point b, and the ink thickness c was set to b−a.

  A perforation 16 for cutting is formed at the boundary between the strong adhesion portion 14 and the weak adhesion portion 15. As shown in FIG. 3, the perforation 16 has a width W1 of the non-cutting portion 23 of 0.05 to 0.05. It is good to set in the range of 0.4 mm. This is because if the width W1 is less than 0.05 mm, the strong adhesion portion 14 and the weak adhesion portion 15 cannot be connected, and conversely if the width W1 exceeds 0.4 mm, the perforation 16 is difficult to cut off. Because. Further, it is preferable that an inclination angle α of 5 ° or more is provided at a peeling start position of the weakly bonded portion 15. The reason is that if the inclination angle α is smaller than 5 °, it is considered that the weakly bonded portion 15 cannot be well separated from the perforated portion 16 when the weakly bonded portion 15 is peeled off.

  The reason why the width W2 of the portion remaining on the postcard is slightly wider than the width W3 of the portion where the strong adhesive is exposed is to facilitate peeling. In addition, as shown in FIG. 4, it is easy to cut the perforation 16 when the paste printing is performed along the perforation 16 with the ultraviolet curable ink. As a guideline, it is preferable that the thickness of the ink is 3 μm or more and the paste is printed around the perforation 16 with a width of 0.5 mm or more.

  Next, the usage method of the concealment label of this invention is demonstrated.

《How to use concealment label》
Although the concealment label 10 can be used in various ways, the example shown in FIG. 5 is applied to an account transfer application form using a postcard. In FIG. 5, the address of the postcard 40 is preprinted with the address of the sender, the communication surface is in the form of an application form, and an information entry field 41 for entering personal information is provided in the frame. .

  First, the user enters predetermined items such as address, name, contact information, designated financial institution name, and account number in the information entry field 41, and in order to conceal them, the concealment label 10 is peeled off from the release paper 30 and pasted. . Here, even after the pasting, if the strong adhesive portion 14 is not pressed, the concealment label 10 can be peeled off and pasted without causing the paper face of the postcard 40 to be destroyed. For this reason, it is possible to add omissions and correct entry errors, which is convenient in handling. And after sticking the concealment label 10, it mails in the state which pressed the strong adhesion part 14 and the weak adhesion part 15 and was made to contact | adhere to the postcard 40.

  The recipient of the postcard with label 40 cuts the perforation 16 of the concealment label 10 as shown in FIG. 5A, and separates and removes the weak adhesive portion 15 from the strong adhesive portion 14. The weakly bonded portion 15 is set to have a peelable adhesive force and is peeled off without leaving any adhesive on the paper surface of the postcard 40. Therefore, the information entered in the information entry column 41 as shown in FIG. Can be read. On the other hand, the strong adhesive portion 14 is pressurized by a mail sorting machine or the like during mailing, and the strong adhesive layer 13 on the back surface is completely adhered to the paper surface of the postcard 40. For this reason, when the strong adhesion part 14 is peeled off, the paper surface of the postcard 40 is destroyed.

  Since the width of the strongly bonded portion 14 left on the postcard 40 is set within 10 mm, it has feedability in the OCR device, and the characters in the information entry column 41 can be read mechanically. .

  Thus, when the concealment label 10 of the present invention is used, it is impossible to peel off the strong adhesion portion 14 and the weak adhesion portion 15 together without cutting the perforation 16. In other words, the perforation 16 must be cut in order for a third party to peel off the concealment label 10 in the middle of mailing and try to steal information. For this reason, even if only the weakly bonded portion 15 is peeled off and then reattached, the trace of the perforation 16 remains, so that the fact that it has been opened can be discriminated visually. . On the other hand, if the perforation 16 is to be peeled off without being cut, the postcard 40 will be destroyed on the fully bonded strongly bonded portion 14, so that an open trace remains on the postcard 40 as well. Therefore, it is possible to prevent an action in which a third party peels off the concealment label 10 and steals or alters personal information, and the personal information is reliably protected.

  In addition, although this embodiment is an example which provided the account transfer application form in the postcard 40, it is not limited to this, for example, for the purpose of concealing personal confidential information such as a credit payment application form, an address change notification, and a questionnaire postcard. The adherend may be paper other than the postcard 40.

  The above is the configuration and method of use of the concealment label of the present invention. Hereinafter, the configuration requirements of the present invention will be described with reference to examples.

"Example"
Whether or not the paper surface breaks down on the surface of the adherend when the concealment label is attached to the adherend and peeled off depends on the relationship between the surface strength of the adherend and the adhesive strength of the concealment label. Then, the state when the concealment label was peeled off from the adherend was verified with respect to the relationship between the surface strength and the area of the white portion of the tint block printing. The verification results are as shown in Table 1 below.

[Evaluation conditions]
A label of the same form as that of the present invention in which the area of the white portion is adjusted to the level shown in Table 1 above is affixed to each adherend in Table 1 above, and the speed of pressure bonding with the roller described in JIS Z0237 10.2.4. Apply a load of about 5 mm / s and one reciprocation and leave for 20 to 40 minutes. Thereafter, the label is peeled off, and the presence or absence of the paper surface breakage of the portion corresponding to the strong adhesion portion and the weak adhesion portion of the adherend is evaluated. It was judged that the product performance of the present invention was provided by having no peelability at the strong adhesion portion and having peelability at the weak adhesion portion. Note that the area of the white portion can be further increased immediately after pasting, but the above condition is used as a substitute evaluation because an external pressure condition such as a mail sorting machine is added at the time of mailing.

[Evaluation results]
(1) The present invention suitably reacts to recycled paper and high-quality paper whose surface is not subjected to sealing treatment.
(2) A sheet having a surface strength of 16 or less has severe adhesive residue and paper surface destruction, and is not suitable for an adherend of a normal re-peeling / re-sticking label (for example, “Repeel” manufactured by Lintec Corporation). When used, it is preferable that the strong adhesive part is more likely to break on the paper surface, and the weak adhesive part satisfies the use of the concealing label by making the area of the white part suitable for the surface strength of 14 to 16 above, and the inkjet It can be a concealment label for paper.
(3) In consideration of the fluctuation of the surface strength of the paper due to environmental changes, the area of the white portion is 0.1 (× 10 ⁻⁶ m ² ) or less for the paper having the surface strength of 11 to 12. If it is not set, it cannot be said that it is suitable for actual operation. However, if the area of the white portion is 0.1 (same as above) or less, the adhesive strength is too weak and the weakly bonded portion of the concealing label does not stick to the paper, and the space between the weakly bonded portion and the paper is hollow. It becomes an envelope instead of a postcard. Therefore, it was determined that the product performance was not exhibited for the adherend having a surface strength of 12 or less.

Judging from the above results comprehensively, the concealment label of the present invention is a strong adhesive label having an adhesive strength in the range of 1 to 20 N / 25 mm. It has been found that those having no releasability and weakly bonded portions are required to have an area of a white portion in the background pattern printing set to 4 × 10 ⁻⁶ m ² or less.

The external view of the concealment label of this invention. The back view of the concealment label of this invention. The A partial enlarged view of FIG. The B partial enlarged view of FIG. Explanatory drawing which shows the usage method of the concealment label of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Concealment label 11 Label base material 12 Concealment layer 13 Strong adhesive layer 14 Strong adhesion part 15 Weak adhesion part 16 Perforation 21 Print layer 22 White part 23 Uncut part 30 Release paper 40 Postcard 41 Information entry column

Claims (6)

  A strong pressure-sensitive adhesive layer coated with a strong pressure-sensitive adhesive is provided on the back surface of the label base material having a concealing property, and a strong adhesive portion having an adhesive force of the strong pressure-sensitive adhesive layer, and an adhesive surface of the strong pressure-sensitive adhesive layer The weakly bonded part, whose adhesive strength is adjusted by applying the tint block printing, is connected in a separable manner through the perforation, and the above strongly bonded part is set to an adhesive force that has no peelability to the adherend. The concealment label is characterized in that the weakly bonded portion is set to an adhesive force having releasability to the adherend. About the said adhesion part, the adhesive force measured by the 180 degree peeling method based on JISZ0237 is set in the range of 1-20N / 25mm, and JAPAN TAPPI paper pulp test method No.1. The surface strength measured by 1 is not peelable with respect to paper of 14 to 20, and the area of the white portion of the tint block printing is set to 4 × 10 ⁻⁶ m ² or less for the weakly bonded portion. The concealment label according to claim 1, wherein the concealment label is used.   The width of the strong bonding portion is set in a range of 3 to 8 mm, and the width of the portion remaining on the adherend after cutting the weak bonding portion is set in a range of 3 to 10 mm. The concealment label according to claim 1 or 2.   The concealment label according to any one of claims 1 to 3, wherein the weakly bonded portion is printed with ultraviolet curable ink, and the thickness of the printed portion is set to 3 µm or more. .   The concealment label according to any one of claims 1 to 4, wherein an inclination angle of 5 ° or more is provided at a peeling start position of the weakly bonded portion.   The concealment label according to any one of claims 1 to 5, wherein a width of the non-cut portion of the perforation is set in a range of 0.05 to 0.4 mm.

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