JPH031464Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a double-sided tape for sealing an opening in a bag such as an envelope.

<Prior Art> Conventionally, this type of double-sided tape has adhesive layers provided on both sides of a base material, and both adhesive layers are covered and protected with release paper.

For this double-sided tape, peel off the release paper on one side, stick it to either the bent protruding piece formed on the edge of the envelope or the upper edge of the other side of the edge, and then The release paper was peeled off, and the bent protruding piece and the upper edge on the other side of the opening were bonded and adhered to seal the opening of the bag body of the envelope.

However, when the double-sided tape is used to seal envelopes, the adhesive layer on one side of the double-sided tape is not transferred to the other side and is repeatedly attached and detached, so it is convenient to open and close the opening repeatedly, but once the envelope is opened, For example, it is difficult to identify whether a document is lost or stolen in an envelope, or it cannot greatly contribute to security measures.

<Problems to be Solved by the Present Invention> The problem to be solved by the present invention is to make it impossible or difficult to reseal an envelope once it has been opened.

<Means for solving the problems> The technical means taken to solve the above problems is to provide an adhesive layer on one side of the base material, apply a solid printing layer on the other side, and apply the solid printing layer to the other side. An adhesive layer was provided on the upper surface of the adhesive layer, and both adhesive layers were each covered and protected with release paper.

<Operation and Effect> The effect of the technical means of the present invention is that between the joint surfaces of the bent protruding piece formed on the edge of the envelope that seals a bag such as an envelope and the upper edge on the other side of the edge. If the envelope is sealed by intervening a base material from which the release paper has been peeled off, and then the bent protruding piece is peeled off from the upper edge on the other side of the mouth edge when attempting to open the envelope, the bent protruding piece The base material is attached to one of the upper edge of the other side of the mouth edge, and the printing layer is transferred to the other side, thereby joining the bent protruding piece and the upper edge of the other side of the mouth edge, respectively. It consists of a base material having a surface to be adhered and a printing layer.

Therefore, even if an attempt is made to bond the two together again, it will be impossible or it will be difficult to bond them together, so it can be determined that the envelope has been opened once.

<Example> Embodiments of the present invention will be described based on the drawings.

Double-sided tape A is provided with an adhesive layer 2 on one side of a base material 1, and a solid printed layer 3 on the other side, and the printed layer 3 is peeled off from the base material 1 on the top surface of the printed layer 3, and the other side to be bonded is attached. An adhesive layer 2' is provided to be transferred to the substrate, and both adhesive layers 2, 2' are covered and protected with release paper 4, 4', respectively.

The base material 1 is made of a material that is hard to tear, such as plastic film or paper, and is formed into a thin band.
If it has mold releasability, the surface on which the adhesive layer 2 is to be applied is subjected to, for example, corona treatment, and if it does not have mold releasability, the surface to which the printing layer 3 is to be applied is subjected to a mold release treatment such as silicone or Teflon. It will be more effective if you apply

The adhesive layer 2 provided on the entire surface of the base material 1 is formed by applying a pressure-sensitive adhesive or glue to the entire surface, and has a large adhesion force to the base material 1 and has a strong adhesion to the adhesive layer 2' on the other surface. It has a relatively strong adhesive force.

The printed layer 3 is a solid coating such as ink printing applied to the entire easily releasable surface of the base material 1, and is peeled off from the base material 1 and transferred as the adhesive layer 2' is transferred.

The adhesive layer 2' provided on the other side of the base material 1 is formed by applying a pressure sensitive adhesive, glue, etc. to the upper surface of the printed layer 3, and has a weaker adhesive force than the adhesive layer 2 provided on the other side. This is a relative thing, for example, it may be the same level, but as mentioned above, the adhesive strength is different depending on the surface with and without the mold release effect, and it is also possible to change the coating width. It is possible even if it is twisted.

The release papers 4, 4' are used to cover and protect the adhesive layers 2, 2', and when used, they are released from the mold to expose the adhesive layers 2, 2'.

Note that it is effective to form the release paper 4' into a wide shape so that it can be easily peeled off.

The double-sided tape A configured above is used when sealing a bag body B such as an envelope, for example, and the third
The method of use will be explained in detail with reference to FIGS. 6 to 6.

First, the release paper 4 that covers and protects the adhesive layer 2 on one side of the base material 1 is peeled off and adhered to the bent protruding piece 5 formed on the edge of the envelope B of the envelope B, and then on the printing layer 3 side. The release paper 4' covering and protecting the adhesive layer 2' is peeled off, and the bent protruding piece 5 and the upper edge 6 on the other side of the mouth edge are bonded and bonded to seal the bag body B.

When the bent protruding piece 5 is peeled off from the upper edge 6 on the other side of the mouth edge in an attempt to open the bag body B, the base material 1 remains on the bent protruding piece 5 side by the adhesive layer 2, and the adhesive layer 2' is transferred to the upper edge 6 side on the other side of the mouth edge, and as the adhesive layer 2' is transferred, the printed layer 3 is peeled off and transferred, so that the bent protruding piece 5 and the mouth edge The adhesive layer is not exposed on the bonding surface between the two and the upper edge 6 on the other side, and even if an attempt is made to bond the two again, it will be impossible or difficult to bond.

In this example, the printed layer 3 was bonded and bonded so as to face the upper edge 6 on the other side of the mouth edge, and the printed layer 3 was transferred to the upper edge 6 on the other side of the mouth edge. The present invention is not limited to this, and the printed layer 3 may be transferred to the bent protruding piece 5 by facing the bent protruding piece 5 (not shown in the figure).

[Brief explanation of drawings]

Figure 1 is a partially cutaway front view of the double-sided tape, Figure 2 is a sectional view taken along the - line in Figure 1, Figure 3 is a front view of the envelope with the double-sided tape attached to the envelope, and Figure 4 is a front view of the envelope with the double-sided tape attached to the envelope. - line sectional view in FIG. 3,
Figure 5 is a sectional view showing the sealed envelope;
The figure is a sectional view showing the envelope in an opened state. In the figure, 1 is a base material, 2 and 2' are adhesive layers, 3 is a printing layer, and 4 and 4' are release paper.

Claims (1)

[Scope of utility model registration request] A double-sided tape characterized in that an adhesive layer is provided on one side of a base material, a solid printed layer is applied on the other side, an adhesive layer is provided on the upper surface of the printed layer, and both adhesive layers are each covered and protected with release paper. .