JP2000003134A - Tacky adhesive sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the natural peeling from the peripheral edge of a tacky adhesive sheet formed with a tacky adhesive layer having discontinuous parts in order to weaken tacky adhesive power. SOLUTION: The continuous belt-like tacky adhesive layer 3a of about 3 mm in width is formed along the contour corresponding to the external shape of a printing layer 2 and the grid-like tacky adhesive layers 3b having the discontinuous parts are formed on the inner side of the belt-like tacky adhesive layer 3a to weaken the tacky adhesive power as a whole without degrading the tacky adhesive power of the contour peripheral edge of the printing layer 2. As a result, the transfer sheet which obviates the natural peeling of a protective sheet 4 from the peripheral edge and is easily peelable even when the seal is restuck and used after the transfer of the printing layer 2 to a transfer object via the tacky adhesive layer 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer formed on one surface of a sheet such as a seal or a label.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Publication No. 6-27440 and Japanese Utility Model Publication No. 2566243, a transfer seal for displaying characters and marks on packaging containers and individual commodities has been proposed. A transfer seal for decoration which is attached to a part or belongings is used.

[0003] These transfer seals are generally left as they are for a long time or for a long time after they have been transferred to a transfer material. It has also been applied to re-attach to objects.

[0004] In particular, in recent years, decorative transfer seals have become widespread, and the use of a decorative transfer seal that has been repeatedly applied to a part of the body or belongings has been increasing. In such a use mode involving re-peeling, it is necessary that the seal can be easily peeled off when peeling off. For this reason, a transfer seal with reduced adhesive strength is also provided.

To reduce the adhesive strength of the seal, it is conceivable to use an adhesive having a low adhesive strength or to reduce the thickness of the adhesive applied. Changing the length is not preferable because it is cumbersome in operation and causes a cost increase. Therefore, a method of adjusting the adhesive force by changing the application pattern of the adhesive has been proposed.

For example, Japanese Unexamined Utility Model Publication No. 3-45580 discloses a re-peelable geometric pattern or a mesh pattern at a predetermined interval on a portion of the paper surface as a support which requires adhesion. There is described a removable adhesive paper coated with an adhesive having the following. Further, Japanese Utility Model Publication No. 7-31261 discloses that an exposed state of an adhesive layer formed on the entire back surface of a base material has a non-adhesive property applied by a printing technique over the entire back surface or at a predetermined portion of the back surface. An adhesive label is described, which is formed into countless fine and uniform halftone dots by a masking agent, and the adhesive force of the entire label is uniformly reduced.

Japanese Patent Application Laid-Open No. Hei 5-320590 describes an adhesive tape, a label, a seal, and an adhesive sheet in which an adhesive that has been drawn to a constant width is applied at regular intervals. Further, Japanese Patent Application Laid-Open No. 7-210086 describes a self-tack sheet in which a pressure-sensitive adhesive layer portion substantially corresponding to a printed portion on the surface is formed as a weakly-adhesive portion by screen printing.

[0008]

Even if the transfer seal is intended to be used after being peeled off, the protective sheet may be peeled off before use or unintended after transfer because of reduced adhesive strength. If the seal is peeled off naturally, it will not be suitable for the intended use of the transfer seal.

However, including those described in the above publication,
In the conventional transfer seal for re-peeling, the peripheral edge of the pressure-sensitive adhesive layer is also formed in a geometric pattern, a mesh pattern, and a halftone dot shape similarly to the inner side, so the peripheral edge is coated with the portion where the pressure-sensitive adhesive is applied. There is a state in which the unexposed portion and the unexposed portion are present alternately.
For this reason, there is a problem that the peripheral edge is easily peeled, and the protective sheet is easily peeled off before use, or the seal is easily peeled off unintentionally after the transfer.

[0010] Such a problem is not limited to a transfer seal, but in a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer formed on one surface of a sheet such as a label or a sticker, the pressure-sensitive adhesive layer having a weakened adhesive strength on the assumption that the pressure-sensitive adhesive layer is used after being peeled off. This can be said for the entire pressure-sensitive adhesive sheet formed with.

The problem to be solved by the present invention is to prevent an adhesive sheet having an adhesive layer having a discontinuous portion in order to weaken the adhesive force from being naturally peeled off from the periphery.

[0012]

Means for Solving the Problems The pressure-sensitive adhesive sheet of the present invention comprises:
On the surface of the sheet on which the pressure-sensitive adhesive layer is formed, a pressure-sensitive adhesive layer having a width of 1 to 15 mm is formed continuously along a contour corresponding to the outer shape of the pressure-sensitive adhesive sheet product. A pressure-sensitive adhesive layer having a continuous portion is formed.

A pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer formed by forming a pressure-sensitive adhesive layer having a discontinuous portion on the assumption that the pressure-sensitive adhesive sheet is to be re-peeled is used. By forming the pressure-sensitive adhesive layer, the peripheral edge can maintain the same adhesive strength as a normal pressure-sensitive adhesive sheet. Is prevented from being peeled off.

The pressure-sensitive adhesive sheet having such a pressure-sensitive adhesive layer exhibits its effect when applied to a seal or label. Seals and labels are often used after peeling off the seal or label when using the article to which the sticker is attached, and it is required that it does not peel off naturally before use, and that it is easy to peel off when peeling off. is there. The pressure-sensitive adhesive sheet of the present invention keeps the same adhesive strength as a normal pressure-sensitive adhesive sheet for the peripheral portion, and weakens the adhesive strength on the inside,
This requirement is met.

When the pressure-sensitive adhesive sheet of the present invention is applied to a transfer seal, the effect is best exhibited. The transfer seal is generally of a configuration in which a printing layer and an adhesive layer are sandwiched between a cover sheet and a protective sheet having releasability, and the adhesive layer is adjusted to the outer shape of the printing layer as described above. By forming the protective sheet, the protective sheet does not peel off naturally before use, and it is easy to peel off even when re-attached and used, so that an optimal transfer seal for repeated peeling and use can be obtained.

As the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer, a pressure-sensitive adhesive used in a conventional pressure-sensitive adhesive sheet can be used. Here, the continuous band-shaped pressure-sensitive adhesive layer or the pressure-sensitive adhesive layer having a discontinuous portion such as a geometric pattern or a halftone dot pattern can be formed by a known coating or printing method.

[0017]

FIG. 1 is a view showing a sectional structure of a transfer seal according to an embodiment of the present invention, and FIG. 2 is a plan view showing an adhesive layer of the transfer seal of FIG.

The transfer seal 10 according to the present embodiment includes a printing layer 2
This is a pressure-sensitive transfer seal in which the adhesive sheet 3 and the adhesive sheet 3 are sandwiched between a cover sheet 1 having releasability and a protective sheet 4. The size of the seal is about 60 mm in length and width.

The covering sheet 1 is formed by coating a transparent film of polyethylene terephthalate with a silicone resin that provides releasability, and the protective sheet 4 is formed by coating paper with a silicone resin that provides releasability.

The printing layer 2 is formed by forming predetermined characters and marks (not shown) on the silicone resin coat of the cover sheet 1 by screen printing. The pressure-sensitive adhesive layer 3 is formed in the pattern shown in FIG.

In this embodiment, a continuous band-shaped pressure-sensitive adhesive layer 3a having a width of about 3 mm is formed along a contour corresponding to the outer shape of the printing layer 2, and has a discontinuous portion inside the band-shaped pressure-sensitive adhesive layer 3a. The lattice-shaped pressure-sensitive adhesive layer 3b is formed so as to reduce the overall adhesive force of the peripheral edge portion of the print layer 2 without decreasing the adhesive force. Thereby, the protective sheet 4 is not spontaneously peeled off from the peripheral portion before use, and after the printing layer 2 is transferred to the transfer material via the adhesive layer 3, the transfer sheet is easily peeled off even when it is used after being reattached. Become.

The pressure-sensitive adhesive layer 3 can be formed by a method similar to a conventional transfer seal using a Tetron 100 mesh plate for screen printing on which a predetermined pattern is formed. Here, the pressure-sensitive adhesive layer having a discontinuous portion is shown in FIG.
Various patterns can be adopted without being limited to the patterns shown in FIG.

FIG. 3 is a view showing another example of the pattern of the pressure-sensitive adhesive layer. FIG. 3A shows a continuous band having a width of about 1 mm along the contour of the periphery of the back surface of the printing layer of the transfer seal. An adhesive layer 5a is formed, and a halftone adhesive layer 5b is formed inside the belt-shaped adhesive layer 5a. (B) of FIG.
Approximately 1m along the contour of the peripheral part of the back of the printing layer of the transfer seal
A continuous band-shaped pressure-sensitive adhesive layer 6a having a width of m is formed, and a stripe-shaped pressure-sensitive adhesive layer 6b is formed inside the band-shaped pressure-sensitive adhesive layer 5a.

[0024]

According to the present invention, the following effects can be obtained.

(1) By forming a continuous pressure-sensitive adhesive layer in a band along the contour corresponding to the outer shape of the pressure-sensitive adhesive sheet product, and forming a pressure-sensitive adhesive layer having a discontinuous portion inside the band-shaped pressure-sensitive adhesive layer In addition, the adhesive force of the entire peripheral portion can be adjusted without reducing the adhesive force.
This prevents the adhesive sheet from being peeled off from the protective sheet before use, and from being unintentionally peeled off when it is not intended after application, even when the adhesive strength as a whole is weakened.

(2) The present invention is particularly effective when applied to seals and labels, and especially when applied to transfer seals, the protective sheet does not peel off naturally before use, and is used by re-attaching. It is easy to peel off at any time, and an optimum transfer seal for repeated use is obtained.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a cross-sectional structure of a transfer seal according to an embodiment of the present invention.

FIG. 2 is a plan view showing an adhesive layer of the transfer seal of FIG.

FIG. 3 is a view showing another example of the pattern of the pressure-sensitive adhesive layer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cover sheet 2 Printing layer 3 Adhesive layer 3a Strip adhesive layer 3b Grid adhesive layer 4 Protective sheet 5a Strip adhesive layer 5b Halftone adhesive layer 6a Strip adhesive layer 6b Strip adhesive layer 10 Transfer seal

Claims (3)

[Claims] 1. A sheet on which a pressure-sensitive adhesive layer is to be formed,
1 to 15 along the contour corresponding to the outer shape of the adhesive sheet product
A pressure-sensitive adhesive sheet comprising a continuous pressure-sensitive adhesive layer having a width of mm and a pressure-sensitive adhesive layer having a discontinuous portion formed inside the pressure-sensitive adhesive layer. 2. The pressure-sensitive adhesive sheet according to claim 1, wherein the pressure-sensitive adhesive sheet is a seal or a label. 3. The pressure-sensitive adhesive sheet according to claim 1, wherein the pressure-sensitive adhesive sheet is a transfer seal in which a printing layer and a pressure-sensitive adhesive layer are sandwiched between a covering sheet having releasability and a protective sheet.