JPH0689307B2 - Adhesive tape manufacturing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a pressure-sensitive adhesive tape, which comprises a step of applying a water-soluble pressure-sensitive adhesive and drying it to form a pressure-sensitive adhesive layer.

In the conventional method for producing a pressure-sensitive adhesive tape in which a water-soluble pressure-sensitive adhesive, for example, acrylic resin emulsion is applied and dried to form a pressure-sensitive adhesive layer, the pressure-sensitive adhesive is directly applied to a tape base material such as kraft paper. When applied and dried, the water content of the pressure-sensitive adhesive causes expansion and contraction and wrinkling of the tape substrate, making it impossible to obtain a satisfactory product. Therefore, avoiding the direct application of the pressure-sensitive adhesive to the tape substrate, the pressure-sensitive adhesive is applied to the release agent layer provided on the tape substrate and dried to form a pressure-sensitive adhesive layer. By sticking the pressure-sensitive adhesive layer to the tape base material having stronger adhesiveness than the release agent layer, by winding the laminated body in which the tape base material, the release agent layer and the pressure-sensitive adhesive layer laminated in this order are wound up. Then, a pressure-sensitive adhesive layer, a tape base material and a release agent layer are laminated in this order to produce a laminate, and further, the release agent layer is rewound so as to form the surface of the roll, the tape base material,
An adhesive tape was manufactured by laminating an adhesive layer and a release agent layer in this order.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the conventional method for producing an adhesive tape as described above,
It is necessary to stick the pressure-sensitive adhesive layer to the tape base material by winding up the laminated body in which the tape base material, the release agent layer and the pressure-sensitive adhesive layer are laminated in this order. Depending on the winding direction, the wound roll that is completed is either the tape substrate or the adhesive layer on the outside. Therefore, in order to obtain a laminate in which the tape substrate, the pressure-sensitive adhesive layer, and the release agent layer are laminated in this order, it is necessary to rewind. This rewinding requires extra equipment, workers, space and time.

The object of the present invention is to provide a pressure-sensitive adhesive tape in which a tape substrate, a pressure-sensitive adhesive layer and a release agent layer are continuously laminated in this order without requiring rewinding, even though a water-soluble pressure-sensitive adhesive is used. It is an object of the present invention to provide a method for producing an adhesive tape that can be produced.

Means for Solving the Problems In order to achieve the above object, the method for producing an adhesive tape of the present invention is a tape substrate, a release agent layer and a first laminated body laminated in the order of the adhesive layer, The pressure-sensitive adhesive layer of the first laminate is transferred to the outer peripheral surface of the transfer roller having stronger adhesion than the release agent layer and weaker adhesiveness than the tape base material, and the tape base material and release agent layer. Second layered
Of the transfer roller, and the pressure-sensitive adhesive layer on the transfer roller is brought into contact with the tape substrate of the second laminate to be adhered, and then the pressure-sensitive adhesive layer, the tape substrate, and the release agent layer are stacked in this order. It is constituted by making a laminated third laminated body and winding the third laminated body.

Example An example of the method for producing an adhesive tape of the present invention will be described with reference to the drawings.

First, the adhesive tape manufacturing facility will be described.

FIG. 1 is a schematic diagram showing an overall view of an adhesive tape manufacturing facility. In FIG. 1, 2 is a known drying device, 3
Is a pressure-sensitive adhesive layer removing means used at the start of operation to remove the excess pressure-sensitive adhesive layer. Reference numeral 4 is a transfer device, the details of which will be described later. Reference numeral 5 is a direction reversing device, which will be described in detail later. Reference numeral 6 indicates a known winding device, and reference numeral 7 indicates a known guide means. 10 generally indicates an adhesive tape during the process,
Reference numeral 8 is an arrow indicating the traveling direction of the adhesive tape 10.

2 and 3 show details of the structure of the transfer device 4 and the direction reversing device 5A.

The transfer device 4 includes a transfer roller 41, an upper pressing roller 42, and a lower pressing roller 43. The transfer roller 41 has an outer peripheral surface whose outer peripheral surface is covered with silicon, Teflon, or the like and has adhesiveness that is stronger than the release agent layer 11 of the laminate 10 and weaker than the tape base material 12, and Between the upper presser roller 42 and the first
Of the adhesive layer 13 by passing through the laminated body 10A (see FIG. 4).
Can be transferred to the outer peripheral surface of the transfer roller 41.

The direction reversing device 5A includes two turn bars 51 and 54 and two guide rollers 52 and 53, and the first turn bar 51 moves the second laminated body 10B (see FIG. 4) 90. The first guide roller 52 reverses the front and back of the second laminated body 10B that has passed through the first turn bar 51 and reverses the traveling direction. , The second guide roller 53 further reverses the front and back sides of the second laminated body 10B that has passed through the first guide roller 52 and reverses the traveling direction, and the second turn bar 54 makes the second By turning the second laminated body 10B which has passed through the th guide roller 53 by 90 degrees and advancing the second laminated body 10B and reversing the front and back sides, While reversing the direction of travel,
The front and back are designed to be the same.

The turn bars 51 and 54 are fixed toward the traveling direction of the second stacked body 10B with both being inclined to the right by 45 degrees. Further, the turn bars 51 and 54 may be processed so as to reduce the frictional resistance of the surface.

The direction reversing device 5B shown in FIG. 5 includes two turn bars 56 and 58 and two guide rollers 55 and 57, and the first guide roller 55 places the second laminated body 10B on the front and back sides. Reverse the direction of travel and the first turn bar
56 turns the second laminated body 10B that has passed the first guide roller 55 by 90 degrees to move the second laminated body 10B forward and reverse, and the second guide roller 57 turns the first turn bar 56 After passing the second laminated body 10B, the front and back sides are reversed and the traveling direction is reversed, and the second turn bar
The direction reversing device for the second laminated body 10B is provided by the fact that the second laminated body 10B, which has passed through the second guide roller 57, is turned by 90 degrees so as to be advanced and the front and back sides are reversed. It is designed so that the direction of travel when entering 5B is reversed and the front and back are the same.

The direction reversing device 5C shown in FIG. 6 is provided with four turn bars 59, and the first turn bar 59 is the second laminated body 10B.
Turn 90 degrees to proceed and reverse the front and back, the second turn bar 59 is the first turn bar
The second laminated body 10B passing through 59 is turned 90 degrees and the front and back sides are reversed, and the third turn bar 59 is
The second laminated body 10B that has passed the third turn bar 59 is turned 90 degrees and the front and back sides are reversed, and the fourth turn bar 59 causes the second laminated body 10B that has passed the third turn bar 59 to 90 degrees. By changing the direction and turning the front and back sides opposite to each other, the front and back sides are the same even if the traveling direction when entering the direction reversing device 5C of the second laminated body 10B is reversed.

The method for producing an adhesive tape is carried out as follows.

A release agent layer 12 made of silicon is laminated on a tape base material 11 made of kraft paper, and a release agent layer 12 coated with an acrylic resin emulsion is passed through a drying device 2 and dried.
Thereby, the first laminated body 10A in which the tape substrate 11, the release agent layer 12, and the adhesive layer 13 are laminated in this order is manufactured.

In addition, a sealing agent (for example, polyethylene) for preventing the release agent from penetrating into the tape base material 11 is used.
In some cases, it may be laminated between the release agent layer 12 and the release agent layer 12.

Then, the first laminated body 10A is passed through the transfer device 4. At this time, the first laminated body 10A has the upper pressing roller 42 of the transfer device 4
The pressure-sensitive adhesive layer 13 of the first laminated body 10A is brought into contact with the outer peripheral surface of the transfer roller 41 by being passed between the transfer roller 41 and the transfer roller 41. The pressure-sensitive adhesive layer 13 is transferred to the outer peripheral surface of the transfer roller 41 having a stronger adhesive force than the release agent layer 12 and a weaker adhesive force than the tape substrate 11, and by this transfer, the first laminated body 10A is adhered. The agent layer 13 is stripped off to form the second laminated body 10B. The second laminated body 10B sent from the transfer device 4 has the direction reversing device 5 (5
A, 5B, or 5C), it does not change the front and back sides when entering, and only returns to the transfer device 4 in the state where only the traveling direction is reversed, and returns to the transfer roller 41 and the lower part. It is fed between the presser roller 43. At this time, the pressure-sensitive adhesive layer 13 transferred and adhered to the outer peripheral surface of the transfer roller 41 and the tape base material 11 of the second laminate 10B come into contact with each other. Since the tape substrate 11 has stronger adhesiveness to the adhesive layer 13 than the outer peripheral surface of the transfer roller 41, the adhesive layer 13 is used from the outer peripheral surface of the transfer roller 41 to the tape of the second laminated body 10B. A third laminated body 10C in which the base material 11 is brought into contact with and adhered to the base material 11, and the adhesive layer 13, the tape base material 11 and the release agent layer 12 are laminated in this order.
Is built.

The third layered product 10C manufactured in this way is separated by the release agent layer 12
The pressure-sensitive adhesive tape can be manufactured by winding the tape with the winding device 6 on the outside.

In addition, the pressure-sensitive adhesive layer removing means 3 first pointed out in FIG. 1 is the first laminated body which comes out of the drying device 2 before the step of passing the first laminated body 10A through the transfer device 4 is started. It is used to prepare the second laminate 10B in the transfer device 4 in advance by removing the adhesive layer 13 from the required length of 10A.

EFFECTS OF THE INVENTION Since the method for producing an adhesive tape of the present invention is configured as described above, it has the effects described below.

First, a water-soluble pressure-sensitive adhesive can be used to produce a desired pressure-sensitive adhesive tape in which a tape substrate, a pressure-sensitive adhesive layer, and a release agent layer are laminated in this order without a rewinding step.

Furthermore, this saves the extra equipment, labor, space and time conventionally required for rewinding.

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining the manufacturing equipment used in the method for manufacturing an adhesive tape of the present invention. 2 and 3 are explanatory views of the transfer device and the direction reversing device in the manufacturing facility, FIG. 2 is a plan view, and FIG. 3 is a perspective view. FIG. 4 is a cross-sectional view showing the constitution of the adhesive tape during the manufacturing process, and FIGS. 4 (1), (2) and (3) show the first laminated body, the second laminated body and the second laminated body, respectively. It is a fragmentary sectional view of the 3rd layered product. 5 and 6 are plan views each showing an example of the direction reversing device. 10 …… Adhesive tape 10A …… First laminate 10B …… Second laminate 10C …… Third laminate 11 …… Tape substrate 12 …… Release agent layer 13 …… Adhesive layer 41… ... Transfer roller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takatoshi Uei 5269 Iwai, Iwai City, Ibaraki Prefecture Rengo Co., Ltd. Tonegawa Processing Plant (56) References JP-A-58-152752 (JP, A)

Claims (1)

[Claims] 1. A first laminate is produced by laminating a tape substrate, a release agent layer and an adhesive layer in this order, wherein the adhesive layer of the first laminate is stronger than the release agent layer, The pressure-sensitive adhesive on the transfer roller is formed by transferring the tape base material and the release agent layer to the outer peripheral surface of the transfer roller having a weaker adhesiveness than that of the tape base material, and forming a second laminate. The layer is brought into contact with and adhered to the tape substrate of the second laminate to form a third laminate in which an adhesive layer, a tape substrate and a release agent layer are laminated in this order, and the third layer is formed. A method for producing an adhesive tape, which comprises winding a laminate.