JPH06100844A - Pressure-sensitive adhesive sheet - Google Patents

Abstract

PURPOSE:To provide a pressure-sensitive adhesive sheet which does not necessarily require a separator and can be desirably and chiefly used in sanitary products such as disposable body warmers and napkins and living-related disposable articles such as paper napkins and other various uses such as double-coated tapes, masking tapes and labels. CONSTITUTION:Pressure-sensitive adhesive layers 2 and release agent layers 3 are alternately formed on at least one surface of support 1, which 1 is folded back at each end so that the pressure-sensitive adhesive layer 2 and the release agent layer 3 may be opposed to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive sheet that does not necessarily require a separator, and is mainly used for disposable body warmers, sanitary items such as napkins, disposable articles related to daily life such as paper diapers, or double-sided tapes for various other purposes. It is preferably used as a masking tape, a label and the like.

[0002]

2. Description of the Related Art Conventionally, when a disposable item such as a disposable warmer is fixed to clothes or the like, a double-sided tape is used or a hot-melt type adhesive is applied and a separator provided thereon is used. It was removed and used.

[0003]

However, in this method, it is necessary to peel off or discard the separator, which makes the usage complicated. Also, from the perspective of protecting the global environment, there is an increasing need to control what is discarded,
There is a strong demand for an adhesive sheet that does not require a separator.

[0004]

The present invention has been made in order to improve the above-mentioned problems, and will be described in detail in a practical example to be described later. By using an adhesive sheet having a specific structure,
The separator, which has been indispensable in the past, can be omitted, and the reliability when a disposable article is attached to clothes or the like can be improved.

That is, according to the present invention, a pressure-sensitive adhesive layer and a release agent layer are provided on one side or both sides of a supporting base material so that they are adjacent to each other. Provided is a pressure-sensitive adhesive sheet, which is characterized in that the agent layers are bent inward so as to face each other.

An example of the present invention will be described below with reference to the drawings. 1 and 2 are cross-sectional views showing an example of the pressure-sensitive adhesive sheet of the present invention, in which the pressure-sensitive adhesive layers 2 and the release agent layers 3 are alternately provided on both surfaces of the support substrate 1 so as to be supported. The base material 1 is bent inward at both ends thereof so that the pressure-sensitive adhesive layer 2 and the release agent layer 3 face each other.

FIG. 3 is a cross-sectional view showing another example of the pressure-sensitive adhesive sheet of the present invention, in which the pressure-sensitive adhesive layer 2 and the release agent layer 3 are alternately provided on one side of the supporting substrate 1, Support substrate 1
At both ends thereof, the pressure-sensitive adhesive layer 2 and the release agent layer 3 are bent inward so as to face each other. Furthermore, since the perforations 4 are provided in the bent portion, the bent portions at both ends of the sheet can be used as a substitute for the separator, and when unnecessary, can be removed at the time of use.
It is also possible to cut in advance instead of this perforation.

FIG. 4 is a cross-sectional view showing another example of the pressure-sensitive adhesive sheet of the present invention. The pressure-sensitive adhesive layer 2 and the release agent layer 3 are alternately arranged on both surfaces of the supporting substrate 1 at different pitches. The support base 1 is bent inward at both ends so that the pressure-sensitive adhesive layer 2 and the release agent layer 3 face each other. As a result, there are two or more adhesive layers,
When fixing the article to clothes or the like, the adhesiveness can be further improved.

Further, in the present invention, as shown in FIGS. 1 to 4, both ends of the pressure-sensitive adhesive sheet may be formed as dry edges 5 so that the end portions can be easily turned during use.

In the present invention, the central portion of the supporting substrate 1 is further cut in advance, and as shown in FIG. 5, an adhesive sheet without a separator can be used regardless of the size of an adherend (for example, body warmer). There is an advantage.

FIG. 6 is a perspective view showing a wound body obtained by winding the pressure-sensitive adhesive sheet of the present invention in a roll shape, and the wound body can be formed without a separator.

FIG. 7 is an explanatory view showing an example of use of the pressure-sensitive adhesive sheet of the present invention, showing a state in which the pressure-sensitive adhesive sheet B is bonded to the disposable article A and the bent portion B1 is opened. It can be mounted by sandwiching it (not shown).

The pressure-sensitive adhesive sheet of the present invention is characterized by the structure as described above, and the material and the like of each constituent member is not limited at all. However, in the present invention,
For example, as the supporting base material, for example, a non-woven fabric or a plastic film is used, and it is particularly preferable to appropriately select from a soft and elastic material. As the pressure-sensitive adhesive, a styrene-based pressure-sensitive adhesive is preferably used, and a pressure-sensitive adhesive made of SEBS (styrene-ethylene-butadiene-styrene copolymer) is particularly preferable, and other acryl-based, rubber-based, olefin-based, etc. Used. . As the release agent, a release agent such as a silicone type or a long chain acrylic type is usually used.

[0014]

EFFECTS OF THE INVENTION The pressure-sensitive adhesive sheet of the present invention has an advantage that the separator, which has been indispensable in the past, can be omitted by having a specific structure, and the complexity of use, environmental problems and cost problems can be solved. Further, since it has a bent portion, when the article is attached to clothing or the like, it is possible to attach the article so as to sandwich the article, and the reliability of the attachment can be improved. Further, the use thereof is not limited at all, but it is suitably used, for example, as a sanitary article such as a disposable body warmer, a napkin, a disposable article related to life such as a disposable diaper, or a double-sided tape, a masking tape, a label, etc. in various other applications. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of an adhesive sheet of the present invention.

FIG. 2 is a cross-sectional view showing another example of the pressure-sensitive adhesive sheet of the present invention.

FIG. 3 is a cross-sectional view showing another example of the pressure-sensitive adhesive sheet of the present invention.

FIG. 4 is a cross-sectional view showing another example of the pressure-sensitive adhesive sheet of the present invention.

FIG. 5 is a cross-sectional view showing another example of the pressure-sensitive adhesive sheet of the present invention.

FIG. 6 is a perspective view showing a wound body obtained by winding the pressure-sensitive adhesive sheet of the present invention in a roll shape.

FIG. 7 is an explanatory diagram showing an example of a usage pattern of the adhesive sheet of FIG.

[Explanation of symbols]

 1 Base Material 2 Adhesive Layer 3 Release Agent Layer

Claims (4)

[Claims] 1. A pressure-sensitive adhesive layer and a release agent layer are provided on one side or both sides of a supporting base material so that they are adjacent to each other, and the pressure-sensitive adhesive layer and the release agent layer face each other at both ends of the supporting base material. An adhesive sheet characterized by being bent inward as described above. 2. The pressure-sensitive adhesive sheet according to claim 1, wherein both ends of the supporting base material have dry edges. 3. The pressure-sensitive adhesive sheet according to claim 1, wherein the bent portions at both ends of the supporting substrate have perforations or are precut. 4. The pressure-sensitive adhesive sheet according to claim 1, wherein the vicinity of the central portion of the supporting substrate is cut beforehand.