JP7153988B2 - Multistage adhesive tape laminate - Google Patents

Description

TECHNICAL FIELD The present invention relates to a multi-layered adhesive tape laminate in which multiple layers of multi-layered adhesive tapes are stacked vertically.

A two-layer masking tape is conventionally known as a multistage adhesive tape formed by joining adhesive tapes in a plurality of upper and lower stages (see, for example, Patent Documents 1 and 2). This two-layer masking tape is a masking tape used to form a boundary between areas to be painted and areas not to be painted during painting work, and reduces the need for repair work on the boundary after peeling off. For the purpose, it has a two-layer structure in which two adhesive tapes are joined.

The two-layer masking tape disclosed in Patent Document 1 has a lower adhesive tape (first adhesive tape) and an upper adhesive tape (second adhesive tape) provided with an adhesive layer on one side of a base material, The adhesive layer of the upper adhesive tape is attached to the back surface of the lower adhesive tape (the side opposite to the adhesive layer). Then, the two-layer masking tape is wound around a predetermined adherend a plurality of times, so that the pressure-sensitive adhesive layer of the lower pressure-sensitive adhesive tape is attached to the back surface of the upper pressure-sensitive adhesive tape. In this way, a multi-layered adhesive tape laminate is formed by laminating two-layer masking tapes, which are multi-layered adhesive tapes, in a plurality of upper and lower layers.

Here, the back surface of the lower pressure-sensitive adhesive tape is formed by the base material itself or by a predetermined release agent applied to the surface of the base material. Similarly, the back surface of the upper pressure-sensitive adhesive tape is also formed by the base material itself or by a predetermined release agent applied to the surface of the base material.

In this multi-layered adhesive tape laminate, the lower layer of the adhesive tape is designed so that the user can pull out the two-layered masking tape well during use, that is, the lower layer of the adhesive tape and the upper layer of the adhesive tape can be pulled out together without peeling off. The adhesive strength of the adhesive layer and the adhesive strength of the adhesive layer of the upper adhesive tape are set to different magnitudes. Specifically, the adhesive force of the lower adhesive tape to the back surface of the upper adhesive tape is set to be smaller than the adhesive force of the upper adhesive tape to the back surface of the lower adhesive tape. As a result, the two-layer masking tape is pulled out in a state in which the back surface of the upper adhesive tape and the adhesive layer of the lower adhesive tape are peeled off, and the lower adhesive tape and the upper adhesive tape overlap each other without being peeled off.

Here, the adhesive force of the lower adhesive tape to the back surface of the upper adhesive tape and the adhesive force of the upper adhesive tape to the back surface of the lower adhesive tape are determined by the composition of the adhesive constituting the adhesive layer, the thickness of the adhesive, and the treatment of the back surface. , and by appropriately adjusting various conditions such as the material of the back surface.

The two-layer masking tape disclosed in Patent Document 2 has an upper adhesive tape (upper layer tape) and a lower adhesive tape (lower layer tape) in which a release agent layer and an adhesive layer are formed on the front and back surfaces of a base material. , the adhesive layer of the upper adhesive tape is attached to the release agent layer of the lower adhesive tape. Then, by winding the two-layer masking tape around a predetermined adherend a plurality of times, the adhesive layer of the lower adhesive tape is attached to the release agent layer of the upper adhesive tape. In this way, a multi-layered adhesive tape laminate is formed by laminating two-layer masking tapes, which are multi-layered adhesive tapes, in a plurality of upper and lower layers.

In this two-layer masking tape, the adhesive force of the lower adhesive tape to the release agent layer of the upper adhesive tape is set to be smaller than the adhesive force of the upper adhesive tape to the release agent layer of the lower adhesive tape. As a result, when the wound two-layer masking tape is pulled out, separation occurs between the release agent layer of the upper adhesive tape and the adhesive layer of the lower adhesive tape, causing the lower adhesive tape and the upper adhesive tape to separate. They are pulled out in an overlapping state without being peeled off.

The adhesive strength of the adhesive layer of the upper adhesive tape to the release agent layer of the lower adhesive tape and the adhesive strength of the adhesive layer of the lower adhesive tape to the release agent layer of the upper adhesive tape form the adhesive layer. Each is set by adjusting the composition of the adhesive.

Utility Model Registration No. 3205388 Japanese Utility Model Laid-Open No. 63-140046

However, in the multistage adhesive tape laminate of Patent Document 1, the adhesive force of the lower adhesive tape to the back surface of the upper adhesive tape is set smaller than the adhesive force of the upper adhesive tape to the back surface of the lower adhesive tape. Similarly, in the multistage adhesive tape laminate of Patent Document 2, the adhesive force of the lower adhesive tape to the release agent layer of the upper adhesive tape is set smaller than the adhesive force of the upper adhesive tape to the release agent layer of the lower adhesive tape. It is Therefore, when the multistage adhesive tape pulled out from the multistage adhesive tape laminate is subsequently used by adhering it to a predetermined adherend, the adhesive force of the lower adhesive tape or the lower adhesive tape may be insufficient. Therefore, there is a problem that the adhesive may be peeled off from the adherend.

Further, as described above, in the multi-stage adhesive tape laminate of Patent Document 1, the adhesive force of the lower adhesive tape to the back surface of the upper adhesive tape and the adhesive force of the upper adhesive tape to the back surface of the lower adhesive tape are Each setting is made by appropriately adjusting various conditions such as the composition of the pressure-sensitive adhesive that constitutes the layer, the thickness of the pressure-sensitive adhesive, the treatment of the back surface, and the material of the back surface. Similarly, in the multistage adhesive tape laminate of Patent Document 2, the adhesive strength of the adhesive layer of the upper adhesive tape to the release agent layer of the lower adhesive tape, and the adhesive strength of the lower adhesive tape to the release agent layer of the upper adhesive tape The adhesive strength of each layer is set by adjusting the composition of the adhesive that forms the adhesive layer. Therefore, the work of setting the adhesive force to a desired level is complicated and time-consuming, and there is also the problem that it is difficult to set the adhesive force accurately.

Therefore, the present invention has been made in consideration of such circumstances, and its object is to prevent the adhesive force of the lower adhesive tape from becoming insufficient when using the drawn multi-stage adhesive tape, and to prevent the upper and lower adhesive tapes from becoming insufficient. To provide a multistage adhesive tape laminate capable of accurately and simply setting the adhesive force of the adhesive tapes.

According to one aspect of the invention,
A multi-stage adhesive tape laminate in which a multi-stage adhesive tape is laminated in a plurality of upper and lower layers,
A substrate layer, a release agent layer formed by applying a release agent to the surface of the substrate layer, and an adhesive layer formed by applying an adhesive to the back surface of the substrate layer. The multi-stage adhesive tape is formed by joining the adhesive tape having a plurality of upper and lower layers so that the upper adhesive layer adheres to the lower release agent layer,
The multi-stage adhesive tape is laminated in a plurality of upper and lower layers so that the adhesive layer of the adhesive tape positioned at the bottom is adhered to the release agent layer of the adhesive tape positioned at the top,
The pressure-sensitive adhesive tape positioned at the top of the multi-layered pressure-sensitive adhesive tape has the adhesive strength of the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer, and the pressure-sensitive adhesive strength of the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer of the pressure-sensitive adhesive tapes of the other stages. and the weight per unit length of the release agent forming the release agent layer is equal to the weight per unit length of the release agent forming the release agent layer of the pressure-sensitive adhesive tape of the other stage A multi-tiered adhesive tape laminate is provided characterized by a weight different from

In addition, in the multi-stage adhesive tape laminate according to one aspect of the present invention, the multi-stage adhesive tape is composed of an upper adhesive tape located on the upper stage and a lower adhesive tape located on the lower stage, and the upper adhesive tape The base material layer may be formed of a transparent or translucent base material, and the base material layer of the lower pressure-sensitive adhesive tape may have a printed body attached to its surface.

In addition, in the multistage adhesive tape laminate according to one aspect of the present invention, the upper adhesive tape may have a different color of the substrate forming the substrate layer than the lower adhesive tape.

In addition, in the multi-stage adhesive tape laminate according to one aspect of the present invention, the pressure-sensitive adhesive tapes in each stage constituting the multi-stage pressure-sensitive adhesive tape have the same composition of the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer, Moreover, the thickness of the adhesive may be the same.

In addition, in the multi-stage adhesive tape laminate according to one aspect of the present invention, the adhesive tape forming the adhesive layer of each stage of the multi-stage adhesive tape has It may have an adhesive strength of 0.7 N/10 mm or more and 1.8 N/10 mm or less by a test method.

In addition, in the multistage adhesive tape laminate according to one aspect of the present invention, the multistage adhesive tape may be laminated into upper and lower multiple layers by being wound around the adherend a plurality of times.

According to one aspect of the invention,
A method for manufacturing a multi-layered adhesive tape laminate in which multiple layers of multi-layered adhesive tapes are laminated,
A long-chain alkyl-based first release agent is applied to the surface of a lower substrate layer made of paper to form a lower release agent layer, and a first pressure-sensitive adhesive is applied to the back surface of the lower substrate layer. A lower adhesive tape coating step for forming a lower adhesive layer by
A second release agent whose weight per unit length is lighter than that of the first release agent is applied to the surface of the upper base layer to form the upper release agent layer, and the back surface of the upper base layer. An upper adhesive tape coating step of forming an upper adhesive layer by applying a second adhesive to the
In a state in which the second pressure-sensitive adhesive is incompletely crosslinked, the upper pressure-sensitive adhesive layer is attached to the surface of the lower release agent layer, whereby the lower pressure-sensitive adhesive tape is attached under the upper pressure-sensitive adhesive tape. A process for making an adhesive tape;
A maturing step of the multi-stage adhesive tape that promotes cross-linking of the first adhesive and the second adhesive, respectively;
A multistage adhesive tape winding step of winding the multistage adhesive tape and attaching the lower adhesive layer to the surface of the upper release agent layer;
A method for manufacturing a multi-stage adhesive tape laminate is provided, comprising:

According to the multistage adhesive tape laminate according to one aspect of the present invention, when the pulled out multistage adhesive tape is used, the adhesive strength of the lower adhesive tape is not insufficient, and the adhesion of the upper adhesive tape and the lower adhesive tape is prevented. The force can be set accurately and easily.

1 is a schematic perspective view showing a multi-stage adhesive tape laminate 1 according to an embodiment of the present invention; FIG. FIG. 2 is a schematic cross-sectional view showing the AA cross section of the multi-stage adhesive tape in FIG. 1; It is explanatory drawing which shows the manufacturing method of the multistage adhesive tape laminated body 1 for every process. It is explanatory drawing which shows the manufacturing method of the multistage adhesive tape laminated body 1 for every process. FIG. 2 is an explanatory view showing a procedure for using the multi-stage adhesive tape laminate according to the embodiment of the present invention, showing a state in which the multi-stage adhesive tape laminate 1 is viewed from the width direction. FIG. 2 is an explanatory view showing the procedure for using the multi-stage adhesive tape laminate according to the embodiment of the present invention, showing a state in which the multi-stage adhesive tape 3 is viewed from the width direction.

BEST MODE FOR CARRYING OUT THE INVENTION A multistage adhesive tape laminate according to an embodiment of the present invention will be described below with reference to the drawings.

(Structure of Multistage Adhesive Tape Laminate)
FIG. 1 is a schematic perspective view showing a multi-stage adhesive tape laminate 1 according to an embodiment of the invention. A multistage adhesive tape laminate 1 includes an adherend 2 made of a paper tube or the like, and a multistage adhesive tape 3 laminated in a plurality of upper and lower layers by being wound around the adherend 2 a plurality of times. .

The adherend 2 plays a role of holding the multi-stage adhesive tape 3 in a laminated state. As shown in FIG. 1, the adherend 2 is a member made of paper having a substantially cylindrical shape, and its axial length is about the same as the width of the multi-stage adhesive tape 3 . In addition, the material and shape of the adherend 2 can be appropriately changed in design as long as the multi-stage adhesive tape 3 can be held.

The multi-stage adhesive tape 3 is used, for example, to attach it to a schedule book to draw the user's attention to desired information, or to attach it to a handout or the like to communicate desired information to others. As shown in FIG. 1, the multistage adhesive tape 3 is a sheet-like member having a width dimension W1 and a long length dimension.

FIG. 2 is a schematic cross-sectional view showing the AA cross section of the multi-stage adhesive tape 3 in FIG. The multistage adhesive tape 3 is composed of two stages, upper and lower, and has a lower adhesive tape 4 positioned at the lower stage and an upper adhesive tape 5 positioned at the upper stage and joined to the lower adhesive tape 4 . For convenience of explanation, each part of the multistage adhesive tape 3 is illustrated in a scale different from the actual scale in FIG. 2 .

As shown in FIG. 2, the lower pressure-sensitive adhesive tape 4 includes a lower substrate layer 6, a lower release agent layer 7 formed on the surface of the lower substrate layer 6, and a back surface of the lower substrate layer 6. and a lower adhesive layer 8 . In this embodiment, the lower substrate layer 6, the lower releasing agent layer 7, and the lower adhesive layer 8 are each set to have the same width dimension W1.

The lower base material layer 6 has a paper first base material 61 having a substantially rectangular cross section and a first printed material 62 attached to the surface of the first base material 61 . Although details are not shown in the figure, the first printed body 62 displays characters, figures, symbols, patterns, etc. in a plan view, or is configured by a combination thereof. Note that the material and cross-sectional shape of the first base material 61 are not limited to those of the present embodiment, and design changes can be made as appropriate. Further, although details are not shown in the drawing, the first base material 61 itself may be a material having a predetermined color, or the surface of the first base material 61 may be coated with a paint of a predetermined color. Also, the first printed body 62 is not an essential component of the present invention, and the lower base material layer 6 can be composed only of the first base material 61 .

The lower release agent layer 7 includes a first release agent 71 applied to cover the surface of the lower substrate layer 6 . The first release agent 71 plays a role of making it easier to separate the upper adhesive tape 5 from the lower adhesive tape 4 . In this embodiment, a so-called long-chain alkyl-based first release agent 71, specifically a long-chain alkyl pendant polymer is used. The first release agent 71 is applied to the surface of the lower base material layer 6 while being dissolved in toluene as an organic solvent. The compositions of the first release agent 71 and the organic solvent are not limited to those of this embodiment, and conventionally known release agents and organic solvents can be arbitrarily used.

The lower pressure-sensitive adhesive layer 8 includes a first pressure-sensitive adhesive 81 applied to cover the back surface of the lower base material layer 6 . The first adhesive 81 serves to adhere the lower adhesive tape 4 to the adherend 2 or the upper adhesive tape 5 . In this embodiment, a so-called acrylic first adhesive 81, specifically an acrylic polymer to which a cross-linking agent (isocyanate or chelate) is added, is used. Note that the composition of the first adhesive 81 is not limited to that of the present embodiment, and conventionally known compositions can be arbitrarily adopted.

Here, the composition and thickness of the first adhesive 81 are set so as to have an adhesive strength of 0.7 N/10 mm or more and 1.8 N/10 mm or less according to the test method specified in JISZ0237:2000. This is in consideration of obtaining an appropriate adhesive strength when the multi-stage adhesive tape 3 pulled out from the multi-stage adhesive tape laminate 1 is attached to an arbitrary place and used. More specifically, the lower limit is set to 0.7 N/10 mm because if the adhesive strength of the first adhesive 81 is less than 0.7 N/10 mm, it will This is because empirically, when the multi-stage adhesive tape 3 is attached, the possibility of peeling off is high. On the other hand, the upper limit is set to 1.8 N/10 mm because if the adhesive strength of the first adhesive 81 exceeds 1.8 N/10 mm, it is necessary to apply a large force when peeling it off from the pasted place. , it becomes difficult to use as a stationery application.

As shown in FIG. 2, the upper pressure-sensitive adhesive tape 5 includes an upper substrate layer 9, an upper release agent layer 10 formed on the surface of the upper substrate layer 9, and a back surface of the upper substrate layer 9. and an upper pressure-sensitive adhesive layer 11 . In this embodiment, the upper substrate layer 9 and the upper release agent layer 10 are set to have the same width dimension W1, while the upper pressure-sensitive adhesive layer 11 has a smaller width dimension than the upper substrate layer 9 and the upper release agent layer 10. It is set to W2. As a result, at both ends of the upper base material layer 9 in the width direction, the upper pressure-sensitive adhesive layer 11 is not formed, and grip portions 12 used for gripping by the user during use are provided respectively.

The upper base material layer 9, like the lower base material layer 6, comprises a second base material 91 made of paper having a substantially rectangular cross section and a second printed material 92 attached to the surface of the second base material 91. , have Although the details of the second printed body 92 are not shown in the drawing, preferably, the second printed body 92 displays characters, figures, symbols, patterns, etc. different from those of the first printed body 62, or is configured by a combination thereof. Note that the material and cross-sectional shape of the second base material 91 are not limited to those of the present embodiment, and design changes can be made as appropriate. Further, although details are not shown in the drawing, the second base material 91 itself may be a material having a predetermined color, or the surface of the second base material 91 may be coated with a paint of a predetermined color. In addition, the second base material 91 is preferably made of a material on which characters can be easily written with a writing instrument such as a pencil. Further, the second printed body 92 is not an essential component of the present invention, and the upper base material layer 9 can be composed only of the second base material 91 .

The upper release agent layer 10 includes a second release agent 101 applied to cover the surface of the upper base material layer 9 . The second release agent 101 has the role of making it easier to separate the lower adhesive tape 4, which is attached on the upper adhesive tape 5 by laminating the multi-layered adhesive tape 3 in multiple layers, from the upper adhesive tape 5. Fulfill. In this embodiment, a long-chain alkyl-based second release agent 101 having the same composition as the first release agent 71, specifically, a long-chain alkyl pendant polymer is used. Like the first release agent 71, the second release agent 101 is also dissolved in toluene as an organic solvent and applied to the surface of the upper base material layer 9. As shown in FIG. The weight (M2) of the second release agent 101 per unit length of the upper adhesive tape 5 is set to be lighter than the weight (M1) of the first release agent 71 per unit length of the lower adhesive tape 4. (M2<M1).

The reason for setting in this way is to consider the characteristics of the multi-stage adhesive tape laminate 1 resulting from the manufacturing method described later. More specifically, the multistage adhesive tape laminate 1 has a characteristic that the adhesive strength of the upper adhesive tape 5 to the lower adhesive tape 4 is stronger than the adhesive strength of the lower adhesive tape 4 to the upper adhesive tape 5 due to its manufacturing method. have. Therefore, even if M2<M1 is set as in the present embodiment, the magnitude of the force required to separate the upper adhesive tape 5 from the lower adhesive tape 4 (hereinafter referred to as "the peeling force of the upper adhesive tape 5") ) is greater than the magnitude of the force required to separate the lower adhesive tape 4 from the upper adhesive tape 5 (hereinafter referred to as "peeling force of the lower adhesive tape 4"). As a result, when the upper adhesive tape 5 is lifted upward during use of the multi-layered adhesive tape stack 1, the lower adhesive tape 4 separates from the upper adhesive tape 5 before the upper adhesive tape 5 separates from the lower adhesive tape 4. do. Therefore, the multi-stage adhesive tape laminate 1 can be preferably used. Contrary to the present embodiment, even if M2>M1 is set, the peeling force of the upper adhesive tape 5 is greater than the peeling force of the lower adhesive tape 4, and the multi-stage adhesive tape laminate 1 can be preferably used. Of course there are. However, setting M2<M1 as in the present embodiment has the advantage of reducing the amount of the second release agent 101 to be applied, thereby reducing costs.

The upper pressure-sensitive adhesive layer 11 includes a second pressure-sensitive adhesive 111 applied to cover the back surface of the upper base material layer 9 . The second adhesive 111 serves to adhere the upper adhesive tape 5 to the lower adhesive tape 4 . In this embodiment, an acrylic second adhesive 111 having the same composition as the first adhesive 81, specifically, an acrylic polymer to which a cross-linking agent (isocyanate or chelate) is added is used. Also, the thickness of the second adhesive 111 is set to be substantially equal to the thickness of the first adhesive 81 . Thereby, the upper pressure-sensitive adhesive layer 11 has adhesive strength substantially equal to that of the lower pressure-sensitive adhesive layer 8 .

(Manufacturing method of multi-stage adhesive tape laminate)
Next, a method for manufacturing the multi-stage adhesive tape laminate 1 according to the embodiment of the present invention will be described. 3 and 4 are explanatory diagrams showing each step of the manufacturing method of the multi-stage adhesive tape laminate 1. FIG. An operator who manufactures the multistage adhesive tape laminate 1 first performs a coating process for the lower adhesive tape 4, as shown in FIG. 3(a). Specifically, the lower adhesive layer 8 is formed by applying the first adhesive 81 to the back surface of the lower base material layer 6 to which the first printed body 62 (not shown) is attached. Then, a release paper H for retaining the adhesive force of the first adhesive 81 is attached so as to cover the lower adhesive layer 8 . The lower adhesive tape 4 thus produced has a width several times the width W1 of the lower adhesive tape 4 shown in FIG.

Further, the operator forms the lower release agent layer 7 by applying the first release agent 71 to the surface of the lower substrate layer 6, as shown in FIG. 3(a). Here, in FIG. 3A, the periphery of the lower release agent layer 7 is enlarged and schematically shown. The first release agent 71 forming the lower release agent layer 7 has poor wettability (low affinity) with respect to the first paper substrate 61 forming the lower substrate layer 6 . Accordingly, the first release agent 71 is scattered on the surface of the lower substrate layer 6, and the lower substrate layer 6 is exposed at positions not covered with the first release agent 71. FIG.

Next, the worker performs the coating process of the upper adhesive tape 5, as shown in FIG. 3(b). Specifically, the upper release agent layer 10 is formed by applying the second release agent 101 to the surface of the upper base material layer 9 to which the second printed body 92 (not shown) is attached. Further, a plurality of upper adhesive layers 11 are formed by applying the second adhesive 111 on the back surface of the upper base material layer 9 at predetermined intervals. As described above, the second adhesive 111 has the same composition as the first adhesive 81 forming the lower adhesive layer 8 and has the same thickness as the first adhesive 81 .

Next, as shown in FIG. 3(c), the worker performs the step of manufacturing the multi-stage adhesive tape 3. Next, as shown in FIG. Specifically, a plurality of upper pressure-sensitive adhesive layers 11 are adhered to the lower release agent layers 7 of the lower pressure-sensitive adhesive tape 4 previously produced. As a result, the lower adhesive tape 4 is adhered under the upper adhesive tape 5, and the multi-layered adhesive tape 3 is produced.

Here, in FIG. 3C, the periphery of the upper pressure-sensitive adhesive layer 11 is enlarged and schematically shown. At this stage, the second adhesive 111 constituting the upper adhesive layer 11 is incompletely crosslinked and not completely solidified, so the first release agent scattered on the surface of the lower base layer 6 It will be in a state of slightly biting into the gap between 71 .

Next, the operator performs a maturing step for the multistage adhesive tape 3 . Specifically, the multistage adhesive tape 3 prepared in the previous step is left to stand still for a predetermined period inside an oven (not shown) maintained at a high temperature to age. That is, the upper pressure-sensitive adhesive layer 11 is solidified by accelerating the cross-linking reaction of the second pressure-sensitive adhesive 111 that is incompletely cross-linked. At this time, the second pressure-sensitive adhesive 111 solidifies while slightly biting into the gaps between the first release agents 71 , so that the upper pressure-sensitive adhesive layer 11 is in relatively strong contact with the lower release agent layer 7 . . On the other hand, the lower adhesive layer 8 is solidified by promoting the cross-linking reaction of the first adhesive 81 in this aging step.

Next, the operator performs the winding process of the multistage adhesive tape 3, as shown in FIG. 4(a). Specifically, the release paper H shown in FIG. 3(c) is peeled off from the lower adhesive layer 8, the exposed lower adhesive layer 8 is wound around the adherend 2 and pasted, and then the upper layer is separated. It is attached to the surface of the template layer 10 . As a result, a roll of the multi-layered adhesive tape laminate 1 is produced in which the multi-layered adhesive tapes 3 are laminated in a plurality of upper and lower layers. At this time, since the lower pressure-sensitive adhesive layer 8 has already been solidified in the previous aging step, it does not bite into the upper release agent layer 10 . Therefore, it can be said that the adhesive force of the lower pressure-sensitive adhesive layer 8 to the upper release agent layer 10 is weaker than the adhesion force of the upper pressure-sensitive adhesive layer 11 to the lower release agent layer 7 .

Finally, the operator performs a step of cutting the multi-stage adhesive tape laminate 1, as shown in FIG. 4(b). Specifically, a blade C is used to cut the roll of the multi-stage adhesive tape laminate 1 at predetermined intervals according to the width dimension of the upper adhesive layer 11 . As described above, the multistage adhesive tape laminate 1 shown in FIG. 2 is completed. Depending on the width of the roll of the multi-stage adhesive tape laminate 1, this cutting step may be omitted. In the present embodiment, after winding the multistage adhesive tape 3 to produce a roll of the multistage adhesive tape laminate 1, the roll is cut at predetermined intervals. It is also possible to prepare a roll of the multi-layered adhesive tape stack 1 by winding the cut multi-layered adhesive tape 3 at the same time as or after cutting each layer. In this case, the release paper H shown in FIG. Then, for each of the multistage adhesive tapes 3 after cutting, the exposed lower adhesive layer 8 is wound around the adherend 2 (previously prepared according to the width dimension of the multistage adhesive tape 3 after cutting). After the release agent layer 10 is adhered, it may be adhered to the surface of the upper release agent layer 10 .

(Procedure for using multi-stage adhesive tape laminate)
Next, a procedure for using the multi-stage adhesive tape laminate 1 according to the embodiment of the present invention will be described. 5 and 6 are explanatory views showing the procedure for using the multistage adhesive tape laminate 1. FIG. 5 shows the multistage adhesive tape laminate 1 viewed from the width direction, and FIG. 6 shows the multistage adhesive tape 3. The state seen from the width direction is shown. Although details are not shown in the drawing, the user of the multi-tiered adhesive tape laminate 1 first holds the multi-tiered adhesive tape laminate 1 with one hand, and moves one end of the multi-tiered adhesive tape 3 in the longitudinal direction with the other hand. to grasp. At this time, as described above, the gripping portions 12 (see FIG. 2) on which the upper adhesive layer 11 is not formed are provided at both ends of the upper adhesive tape 5 in the width direction. Therefore, the user can grip the multi-tiered adhesive tape 3 by inserting the fingertips into at least one of the gripping portions 12 and gripping the width direction end portion of the upper base material layer 9 without staining the fingertips with the upper adhesive layer 11 . can do.

Next, the user lifts up the gripped upper adhesive tape 5 as shown in FIG. 5(a). Here, as described above, the upper adhesive layer 11 has substantially the same adhesive strength as the lower adhesive layer 8, and the upper adhesive tape 5 is separated from the lower adhesive tape 4 so that its peeling force is greater than that of the lower adhesive tape 4. A stencil is applied. Therefore, when the upper adhesive tape 5 is lifted upward, the lower adhesive layer 8 is peeled off from the upper release agent layer 10 before the upper adhesive layer 11 is peeled off from the lower release agent layer 7 . That is, the multi-layered adhesive tape 3 is separated between two layers adjacent to each other without separating the multi-layered adhesive tape 3 into the upper layer adhesive tape 5 and the lower layer adhesive tape 4 . Therefore, the user can pull out the multistage adhesive tape 3 in a state in which the upper adhesive tape 5 and the lower adhesive tape 4 overlap each other without peeling off.

Then, the user pulls out the multi-stage adhesive tape 3 by a desired length, and then cuts the multi-stage adhesive tape 3 at a predetermined position, although the details are not shown in the drawing. Then, the user attaches the lower adhesive layer 8 of the cut multi-tiered adhesive tape 3 to an arbitrary location P, as shown in FIG. 5(b). Here, as described above, the composition and thickness of the first adhesive 81 forming the lower adhesive layer 8 are set so that an appropriate adhesive force can be obtained when the multi-stage adhesive tape 3 is used. Therefore, the multistage adhesive tape 3 is less likely to come off from the place P where it is attached, and can maintain an appropriate adhesive strength for a predetermined period of time.

Next, as shown in FIG. 6A, the user exposes the lower adhesive tape 4 by peeling off the upper adhesive tape 5 from the multi-tiered adhesive tape 3 at arbitrary timing. Here, the timing of this removal is when the initial purpose of use of the upper adhesive tape 5 is achieved, for example, when the purpose of calling the attention of the user is achieved, or when the purpose of transmitting desired information to others is achieved. Such as when

Finally, as shown in FIG. 6(b), the user peels off the remaining lower adhesive tape 4 from the location P at any timing. Here, as for the timing of this peeling off, as with the upper adhesive tape 5, the time when the lower adhesive tape 4 reaches its initial purpose of use can be mentioned. With the above, the use of the multi-stage adhesive tape laminate 1 is completed.

(Modification)
The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention defined by the claims. For example, as embodiments of the present invention, modifications such as those shown below are conceivable.

(1) In the present embodiment, a single long multi-stage adhesive tape 3 is wound around the adherend 2 a plurality of times to stack the multi-stage adhesive tape 3 in a plurality of upper and lower layers. However, as a mode of laminating the multistage adhesive tape 3 in a plurality of upper and lower layers, instead of this embodiment, a mode in which a plurality of sheet-like multistage adhesive tapes are stacked in the thickness direction may be used.

(2) In the present embodiment, the structure of the multistage adhesive tape 3 is a two-stage structure in which the upper adhesive tape 5 and the lower adhesive tape 4 are joined together. However, the multistage configuration of the multistage adhesive tape 3 is not limited to the present embodiment, and it is also possible to adopt a configuration of three or more upper and lower stages in which a plurality of adhesive tapes are joined. In that case, for the adhesive tape positioned at the top, the adhesive strength of the adhesive forming the adhesive layer is set to be substantially equal to that of the adhesive tapes positioned at other levels below it, and The weight per unit length of the release agent forming the release agent layer of the pressure-sensitive adhesive tape located below is the weight per unit length of the release agent forming the release agent layer of the pressure-sensitive adhesive tape of the other layer located below. should be set lighter than the weight of This allows the user to peel off the multi-layered adhesive tape 3 between adjacent layers without separating the multi-layered adhesive tape 3 into a plurality of adhesive tapes during use.

(3) In the present embodiment, the upper base material layer 9 is formed of the second base material 91 made of paper, but instead of this, the upper base material layer 9 can also be formed of a transparent or translucent film member. It is possible. In this case, it is possible for the user to be able to see the entire first printed body 62 of the lower base material layer 6 through the upper base material layer 9 from the beginning of use. Alternatively, in this case, at the beginning of use, only a part of the first printed body 62 of the lower base material layer 6 is transmitted through the upper base material layer 9 and made invisible to the user, and when the upper adhesive tape 5 is removed, the lower base material All of the first print 62 of layer 6 can also be visible to the user.

(4) In the present embodiment, in order to set the adhesive strength of the first adhesive 81 of the lower adhesive tape 4 and the second adhesive 111 of the upper adhesive tape 5 to be substantially equal, the first adhesive 81 and the second adhesive 111 were set to have the same composition and equal thickness. However, instead of this, by appropriately adjusting the composition and thickness of the first adhesive 81 and the second adhesive 111, it is also possible to set the adhesive strengths of both to be substantially equal.

1 Multistage Adhesive Tape Laminate 2 Adherend 3 Multistage Adhesive Tape 4 Lower Adhesive Tape 5 Upper Adhesive Tape 6 Lower Base Material Layer 7 Lower Release Agent Layer 8 Lower Adhesive Layer 9 Upper Base Material Layer 10 Upper Release Agent Layer 11 Upper adhesive layer 61 First substrate 62 First printed body 71 First release agent 81 First adhesive 91 Second substrate 101 Second release agent 111 Second adhesive

Claims (7)

A multi-stage adhesive tape laminate in which a multi-stage adhesive tape is laminated in a plurality of upper and lower layers,
A substrate layer, a release agent layer formed by applying a release agent to the surface of the substrate layer, and an adhesive layer formed by applying an adhesive to the back surface of the substrate layer. The multi-stage adhesive tape is formed by joining the adhesive tape having a plurality of upper and lower layers so that the upper adhesive layer adheres to the lower release agent layer,
The multi-stage adhesive tape is laminated in a plurality of upper and lower layers so that the adhesive layer of the adhesive tape positioned at the bottom is adhered to the release agent layer of the adhesive tape positioned at the top,
The pressure-sensitive adhesive tape positioned at the top of the multi-layered pressure-sensitive adhesive tape has the adhesive strength of the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer, and the pressure-sensitive adhesive strength of the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer of the pressure-sensitive adhesive tapes of the other stages. and the weight per unit length of the release agent forming the release agent layer is equal to the weight per unit length of the release agent forming the release agent layer of the pressure-sensitive adhesive tape of the other stage A multi-stage adhesive tape laminate characterized in that the weight is different from the weight of the adhesive tape. The multistage adhesive tape is composed of an upper adhesive tape located in the upper stage and a lower adhesive tape located in the lower stage,
3. The base material layer of the upper adhesive tape is formed of a transparent or translucent base material, and the base material layer of the lower adhesive tape has a printed material attached to its surface. 2. The multi-stage adhesive tape laminate according to 1. 3. The multistage adhesive tape laminate according to claim 2, wherein the upper adhesive tape has a different color of the substrate forming the substrate layer than the lower adhesive tape. 4. The pressure-sensitive adhesive tapes of each stage constituting the multi-layered pressure-sensitive adhesive tape have the same composition of the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer and the same thickness of the pressure-sensitive adhesive. The multi-stage pressure-sensitive adhesive tape laminate according to any one of . The pressure-sensitive adhesive tape of each stage constituting the multi-stage pressure-sensitive adhesive tape has a pressure-sensitive adhesive forming the pressure-sensitive adhesive layer of 0.7 N/10 mm or more and 1.8 N/10 mm or less in a test method specified in JISZ0237:2000. 5. The multi-layered adhesive tape laminate according to any one of claims 1 to 4, which has adhesive strength. 6. The multi-layered adhesive tape laminate according to any one of claims 1 to 5, wherein the multi-layered adhesive tape is laminated in a plurality of upper and lower layers by being wound around an adherend a plurality of times. . A method for manufacturing a multi-layered adhesive tape laminate in which multiple layers of multi-layered adhesive tapes are laminated,
A long-chain alkyl-based first release agent is applied to the surface of a lower substrate layer made of paper to form a lower release agent layer, and a first pressure-sensitive adhesive is applied to the back surface of the lower substrate layer. A lower adhesive tape coating step for forming a lower adhesive layer by
A second release agent having a lighter weight per unit length than the first release agent is applied to the surface of the upper base layer to form the upper release agent layer, and the same adhesive as the first adhesive is applied to the surface of the upper substrate layer. an upper pressure-sensitive adhesive tape coating step of forming an upper pressure-sensitive adhesive layer by applying a second pressure-sensitive adhesive having substantially the same thickness to the back surface of the upper base material layer;
In a state in which the second pressure-sensitive adhesive is incompletely crosslinked, the upper pressure-sensitive adhesive layer is attached to the surface of the lower release agent layer, whereby the lower pressure-sensitive adhesive tape is attached under the upper pressure-sensitive adhesive tape. A process for making an adhesive tape;
A maturing step of the multi-stage adhesive tape that promotes cross-linking of the first adhesive and the second adhesive, respectively;
A multistage adhesive tape winding step of winding the multistage adhesive tape and attaching the lower adhesive layer to the surface of the upper release agent layer;
A method for producing a multi-stage adhesive tape laminate, comprising:

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