JP3001385U - Double-sided adhesive tape with metal foil as core material - Google Patents

Abstract

(57) [Summary] [Purpose] A metal foil, which is hard to attach to conventional corrugated paper and is hard to fit on a corrugated cardboard, etc., is used as a core material. Provided is a double-sided adhesive tape which is particularly suitable for joining corrugated cardboard sheets and the like in which the joint portion can be easily detected in the corrugated paperboard manufacturing process or the like. [Structure] At least one pressure-sensitive adhesive layer of a double-sided pressure-sensitive adhesive tape in which a pressure-sensitive adhesive layer, a metal foil, a pressure-sensitive adhesive layer, and release paper are laminated in this order, except for both ends of the pressure-sensitive adhesive tape, where no pressure-sensitive adhesive is applied. A double-sided pressure-sensitive adhesive tape having a metal foil as a core material, which is formed by linearly forming 1 to 3 strips in a length direction.

Description

[Detailed description of the device]

[0002]

[Industrial applications]

 The present invention relates to a double-sided adhesive tape having a metal foil as a core material. More specifically, it is used as a splice for corrugated board sheets when changing the type of corrugated board sheets in the manufacturing process of corrugated ball paper, is extremely easy to remove, and improves the air release to form corrugated ball sheets. The present invention relates to a double-sided pressure-sensitive adhesive tape having a metal foil as a core material, which is particularly suitable for splicing corrugated cardboard sheets and the like, which is easy to be familiar with and can easily detect a spliced portion.

[0003]

[Prior art]

 In the corrugated paperboard manufacturing process, a double-sided adhesive tape using a non-woven fabric as a support has been generally used for joining sheets when changing the type of corrugated board. When the changed corrugated board sheet is put on the process, this joint is removed, but a metal detector is usually used as a method of detecting the joint during the process. Therefore, for example, metal foil is attached to the double-sided adhesive tape that connects the corrugated cardboard sheets, but since the metal foil part is not adhered, the adhesion area is reduced and problems such as adhesion failure are likely to occur. .

As a solution to such a problem, a double-sided adhesive tape for corrugated paperboard joint which has been devised recently has been disclosed. For example, there is one in which a metal foil and a metal foil laminated paper obtained by laminating a paper or a non-woven fabric are used as the base material of the tape (Japanese Utility Model Publication No. 3-43218). As shown in the cross-sectional view of FIG. 3, this tape has a base material 36 to which an adhesive 32 is applied. An adhesive 34 is applied to one side of a metal foil 31 and a paper or non-woven fabric 33 is laminated on the base material 36 to adhere the adhesive. The agent 32 is applied so that it easily fits on the corrugated paper. This is a device that uses aluminum foil alone as the base material, but the tape itself is rigid and bones, and even if it is crimped it creates air pockets and does not adhere well to corrugated cardboard etc. It requires extra material and process.

Alternatively, when a tape base material is used as a wound body, a release agent is partially coated at a position where the front and back sides do not overlap each other, and one surface of the tape base material is coated with an adhesive to adhere the tape base material. As shown in the sectional view developed by winding the material layer inside, the release agent layer 43 and the pressure-sensitive adhesive layer 42 are partially provided on both surfaces of the tape base material 41, and the release is performed. A double-sided adhesive tape that does not require paper (Japanese Patent Publication No. Sho 64-20285) has also been devised. This adhesive tape has a release agent applied to the surface of the base material, but this is necessary in the manufacturing process and does not have any special action in use. is there. The base material is not particularly limited, but is preferably Washi paper or non-woven fabric, which has an effect of adhering to both a release agent and an adhesive, and there is no description of using a metal, but this tape is a corrugated cardboard using a metal detector. It cannot be used for joints.

[0006]

[Problems to be solved by the device]

 The present invention has been made in view of the above circumstances, and a metal foil, which is conventionally hard and difficult to adapt to corrugated paper, etc., as a core material, is used as a core material as a core material for corrugated ball paper, etc. An object of the present invention is to provide a double-sided adhesive tape that is particularly suitable for splicing corrugated cardboard sheets and the like, which is easy to familiarize with, is extremely easy to remove, and is easy to detect the spliced portion in the corrugated board manufacturing process.

[0007]

[Means for Solving the Problems]

 That is, the double-sided pressure-sensitive adhesive tape having the metal foil as the core material according to the present invention has at least one pressure-sensitive adhesive layer of the double-sided pressure-sensitive adhesive tape in which the pressure-sensitive adhesive layer, the metal foil, the pressure-sensitive adhesive layer, and the release paper are laminated in this order. Except for the part, the part to which the adhesive is not applied (hereinafter referred to as “air vent part”) is characterized in that 1 to 3 linear sections are formed in the length direction.

If the air vents are formed at both ends of the adhesive tape, the ends will not stick, and the object of the present invention will not be achieved, and there is no point in forming the air vents. That is, it is necessary to form the air vent portion by leaving at least 10 mm of both ends of the adhesive layer. The width of one strip of the air vent is preferably in the range of 1 to 5 mm. If the width of the single air vent is smaller than 1 mm, it is not sufficient to fulfill the air venting function, and if it is wider than 5 mm, the adhesive strength of the adhesive is weakened, which is not preferable.

As the core material of the double-sided pressure-sensitive adhesive tape having the metal foil as the core material according to the present invention, metal foil of aluminum, copper, tin, brass or the like can be preferably used. The thickness of the metal foil is preferably 5 to 20 μm. If it is 5 μm or less, there is a problem in strength as a core material, and if it exceeds 20 μm, the tape becomes hard and the workability is deteriorated, which is not preferable.

[0010]

[Action]

 Conventionally, a metal foil that is directly coated with an adhesive is inevitably hard and boned, and it is easy to trap air and create air traps. Since the double-sided adhesive tape has the above-mentioned configuration, even if the adhesive is directly applied to the metal foil by the function of the air vent, it becomes easy to fit in the corrugated board and the like. It can be used as a joint. Moreover, it is extremely easy to remove, and since it has the core of the metal foil, it is easy to detect the spliced portion, so that it can be particularly suitably used for splicing corrugated cardboard sheets and the like.

[0011]

【Example】

 The double-sided pressure-sensitive adhesive tape having a metal foil as a core material according to the present invention will be specifically described below. FIG. 1 is a cross-sectional view showing an embodiment of the double-sided adhesive tape according to the present invention, and FIG. 2 is a cross-sectional view showing another embodiment of the same. FIG. 1 shows an example in which an air vent is formed only on one side of an adhesive layer. FIG. 2 shows an example in which it is formed on the pressure-sensitive adhesive layers on both sides.

In FIGS. 1 and 2, 1 is a metal foil of a core material (aluminum foil is used as an example), 2 is an adhesive layer (acrylic solution type adhesive is used as an example), and 5 is release paper. . The adhesive is preferably a solution-type rubber-based, acrylic-based or silicone-based pressure-sensitive adhesive, and acrylic-based adhesives are particularly preferable.

The pressure-sensitive adhesive layer 2 is directly applied to both sides of the aluminum foil 1, but at least one side thereof is provided with an air bleed portion 3 to which no pressure-sensitive adhesive is applied as shown in FIG. 1 in a linear shape in the longitudinal direction of the tape. As shown in the figure, the air vent portion 3 is preferably formed on the inner side with both end portions of the pressure-sensitive adhesive layer 2 left at least 10 mm. Further, the air vents 3 can be formed on both sides of the metal foil 1 as shown in FIG.

The air vents 3 are formed in 1 to 3 lines for each adhesive layer 2. In FIG. 1, three lines are formed on one side, and in FIG. 2, two lines are formed on each side. The width of the air bleeding portion 3 is 1 to 5 mm (the width of the adhesive tape is usually 30 to 50 mm), and the spacing between the strips is arbitrary, but as described above, leave 10 mm or more at both ends and average them as much as possible. It is desirable to form.

Although the thickness of the pressure-sensitive adhesive layer 2 is arbitrary, it is usually preferably about 50 to 100 μm. The partial coating method of the pressure-sensitive adhesive is not particularly limited, and for example, a commonly used coating method can be applied by a masking method. The produced double-sided pressure-sensitive adhesive tape can be used by winding it with the pressure-sensitive adhesive layer 2 inside and the release paper 5 outside.

[0016]

[Effect of device]

 Since the present invention has the above-mentioned structure, it is hard to attach to the surface of metal foil, which could not be used as a core material of a double-sided adhesive tape as it is as it is because it is hard and is not familiar with corrugated paper. By forming continuous air vents where no adhesive is applied, there is no need to apply a release agent or laminating paper or non-woven fabric as with conventional devices, and it can be used directly on the metal foil alone. By forming a pressure-sensitive adhesive layer into a double-sided pressure-sensitive adhesive tape, it can be suitably used in the corrugated paperboard manufacturing process and the like. Moreover, since this double-sided adhesive tape has a metal foil as the core material, a metal detector can be used to detect the joint in the corrugated paperboard manufacturing process, so it is easy to detect, and peeling is also easy and easy to remove. be able to.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a sectional view of an example of a conventional double-sided adhesive tape.

FIG. 4 is a cross-sectional view of another example of the conventional double-sided adhesive tape.

[Explanation of symbols]

 1 Core material Aluminum foil 2 Adhesive layer 3 Release paper 31 Adhesive 32 Base material 33 Paper or non-woven fabric 34 Adhesive 35 Metal foil 36 Release paper 41 Tape base 42 Release agent 43 Adhesive

Claims (4)

[Scope of utility model registration request] 1. At least one pressure-sensitive adhesive layer of a double-sided pressure-sensitive adhesive tape in which a pressure-sensitive adhesive layer, a metal foil, a pressure-sensitive adhesive layer, and a release paper are laminated in this order, except for both end portions of the pressure-sensitive adhesive tape, which is not coated with a pressure-sensitive adhesive. A double-sided pressure-sensitive adhesive tape having a metal foil as a core material, characterized in that 1 to 3 linear sections are formed in the length direction. 2. The width of the portion not coated with the adhesive is 1 to 5
The double-sided pressure-sensitive adhesive tape having the metal foil according to claim 1 as a core material. 3. The metal foil is aluminum, copper, tin,
A double-sided pressure-sensitive adhesive tape having the metal foil according to claim 1 as a core material, which is either brass. 4. A double-sided pressure-sensitive adhesive tape having a metal foil as a core material according to claim 1, wherein the metal foil has a thickness of 5 to 20 μm. [0001]