JP2016065117A - Transfer method of adhesive agent of adhesive sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem of difficulty to effectively form an adhesive agent layer for adhering a rubber layer on a surface to be adhered being a side face of a subject to be adhered.SOLUTION: There is provided a transfer method in which an adhesive agent layer of an adhesive sheet is transferred on one or more subjects to be adhered having side faces by a plug-assist apparatus, in which the adhesive agent layer includes a top coating adhesive agent layer and a primer coating adhesive agent layer, the top coating adhesive agent layer is a layer of an adhesive agent having reactivity with unvulcanized rubber, the primer coating adhesive agent layer is a layer of an adhesive agent which is easily adhered with the subjects to be adhered, and the layers are transferred at positions corresponding to the one or more subjects to be adhered by the plug-assist apparatus equipped with holes into which each of the one or more subjects to be adhered can be inserted.SELECTED DRAWING: Figure 2A

Description

  The present invention relates to a method of previously forming an adhesive layer for adhering a rubber layer of unvulcanized rubber to an adhesion target surface of an adhesion target object on the adhesion target surface of the adhesion target object. The present invention relates to a method for forming an adhesive layer on the side surface of an elongated member such as the above.

  Patent Document 1 discloses an adhesive sheet as a material for forming an adhesive layer in advance on the adhesion target surface in advance in order to fix it as a rubber layer on the adhesion surface of the adhesion target object. This adhesive sheet functions as an adhesive between a metal surface to be bonded and an unvulcanized rubber layer to be bonded to the metal surface when the rubber layer is bonded to metal. First, the adhesive sheet will be described.

  FIG. 4A shows an adhesive sheet film 20 described in Patent Document 1. FIG. The adhesive sheet 20 described in Patent Document 1 includes a film 21, a top coat adhesive layer 22, and a base coat adhesive layer 23. The film 21 of the adhesive sheet 20 is a sheet material such as paper or a polymer compound of nylon, polypropylene (PP), polyethylene (PE), polyester, or polyimide. Since a material having high heat resistance is preferable, the film material is preferably a film made of a polymer compound having high heat resistance such as polyester or polyimide. Among polyesters, polyethylene terephthalate (PET) is the most suitable material for the film.

  On one surface of the film 21, a “solvent-dispersed vulcanized adhesive” that is reactive with the rubber layer to be bonded is applied. For example, it is formed by applying a solvent-dispersed vulcanized adhesive on one surface of the film in a state where the film can be continuously supplied. This solvent-dispersed vulcanized adhesive becomes the final coating adhesive layer 22 to be formed. After application, the solvent of volatile components is evaporated and dried. Thus, the top coat adhesive layer 22 of the solvent dispersion type vulcanized adhesive is formed on one surface of the film 21. The topcoat adhesive layer 22 becomes an adhesive on the rubber layer side when the rubber layer is bonded to a metal.

Japanese Patent No. 4681634

  After the overcoat adhesive layer 22 is formed on the surface of the film 21, an undercoat is applied to the upper surface of the overcoat adhesive layer 22 (the surface of the top adhesive layer 22 opposite to the film 21). An adhesive layer 23 is formed. The undercoat adhesive layer 23 applies an adhesive having reactivity with an object to be bonded such as metal. The method for forming the undercoat adhesive layer 23 is the same as that for forming the topcoat adhesive layer 22. The film 21 on which the top adhesive layer 22 is formed is continuously supplied from a roller, for example, at a constant speed, and bonded to the surface of the top adhesive layer 22 of the film 21 with a predetermined thickness. Apply the agent. After application, the adhesive is dried to evaporate the volatile component solvent. As a result, an adhesive sheet 20 in which the top adhesive layer 21 of the solvent-dispersed vulcanized adhesive is formed on one surface of the film 21 and the undercoat adhesive layer 23 is formed thereon can be obtained.

  When the unvulcanized rubber is bonded to the adhesion target object 24 using the adhesive sheet 20, first, the adhesive layers (the top adhesive layer 22 and the undercoat adhesive layer 23) of the adhesive sheet 20 are bonded to the adhesion target object 24. Transcript to. In the transfer, the adhesive layer (the top adhesive layer 22 and the undercoat adhesive layer 23) is bonded to the object to be bonded 24, and then the film 21 is peeled off. When the film is peeled off and the top adhesive layer 22 is exposed, unvulcanized rubber is placed on the top adhesive layer 22. Thereby, the top coat adhesive layer 22 and the undercoat adhesive layer 23 are interposed between the rubber layer and the adhesion target object 24, and these adhesive layers fix the unvulcanized rubber to the adhesion target object 24. It can be done.

  Here, when the adhesive layer is transferred to the bonding object 24, the undercoat adhesive layer 23 needs to be firmly fixed to the bonding object. When adhering the undercoat adhesive layer 23 of the adhesive sheet 20 to the adhesion target object 24, first, the undercoat adhesive layer 23 is disposed so as to contact the adhesion target object 24 as shown in FIG. 4B. Then, when the top coating adhesive layer 22 and the base coating adhesive layer 23 are pressed through the film 21 under predetermined conditions, the base coating adhesive layer 23 is firmly fixed to the object to be bonded 24. Therefore, in order for the unvulcanized rubber to be firmly fixed to the bonding target object 24, first, the undercoat adhesive layer 23 needs to be firmly bonded to the bonding target object 24. Therefore, when bonding the undercoat adhesive layer 23 of the adhesive sheet 20 to the bonding object 24, it is necessary to press the film 21 under appropriate conditions. In general, when bonding to a flat plate, it is conceivable to press using gravity such as using a weight. However, when the adhesive sheet 20 is bonded to a cylindrical side surface or the like, gravity cannot be used, and it is difficult to apply appropriate pressure on the adhesive sheet 20. Furthermore, at that time, it is preferable that a plurality of objects to be bonded having the same shape can be pressed at a time.

  A transfer method for transferring an adhesive layer of an adhesive sheet to one or more objects to be bonded having side surfaces by a plug assist device, wherein the adhesive layer includes an overcoat adhesive layer and an undercoat adhesive layer, and the overcoat The adhesive layer is an adhesive layer having reactivity with a rubber layer, the undercoat adhesive layer is an adhesive layer having reactivity with the object to be bonded, and the plug assist device is Each of the one or more bonding objects is provided with a hole that can be inserted into a position corresponding to the bonding object, and the method includes the one or more bonding objects at a position corresponding to the hole of the plug assist device. An adhesion object placing step of placing an object; and the one or more adhesions in the state where the undercoat adhesive layer contacts the adhesion object on the one or more adhesion objects. Adhesive sheet placed on the object A step of moving the plug assist device to maintain the object to be bonded together with the adhesive sheet in the hole for a predetermined time; and moving the plug assist device to move the bonding The problem is solved by a transfer method comprising a drawing step of drawing an object out of the hole.

  By this invention, it becomes possible to form effectively the adhesive bond layer for adhere | attaching unvulcanized rubber on the adhesion object surface of an adhesion target object.

1 is a perspective view of a plug assist device used in the present invention. It is the schematic about the method of this invention using a plug assist apparatus, Comprising: The plug assist apparatus has shown the state raised. It is the schematic about the method of this invention using a plug assist apparatus, Comprising: The state which the plug assist apparatus fell is shown. It is a perspective view of the plug assist device of another form. The cross section of the adhesive sheet used for this invention is shown. The cross section of the adhesive sheet at the time of transferring an adhesive sheet to a bonding target object is shown.

  A method and apparatus for forming an adhesive layer on the outer surface of a member will be described with reference to FIGS. 1, 2A and 2B. FIG. 1 shows a plug assist device for uniformly extending an adhesive sheet 20 to an object to be bonded 24. 2A and 2B show a method of transferring the adhesive sheet 20 to the bonding object 24 using the plug assist device 1. Here, as a representative example of this method, an adhesive layer for adhering the rubber layer is formed on the outer surface as a pretreatment of the process of adhering the rubber layer to the side surface of the bonding object 24 having a metal tube shape. This will be described as a method. The object to be bonded 24 to which the rubber layer is to be bonded has a cylindrical shape. However, the member is not limited to a cylindrical shape as long as it is an elongated member.

  The plug assist device 1 is disposed above the table 11 so as to be movable up and down. A bonding object 24 is placed on the table 11. The plug assist device 1 is provided with a hole 2 having a diameter slightly larger than the diameter of the bonding object 24. The positions of the plug assist device 1 and the hole 2 are set so that the bonding object 24 is positioned in the hole 2 when the plug assist device 1 is lowered. One or more bonding objects 24 are placed on the table 11. In FIG. 1, nine bonding objects 24 and holes 2 are arranged, but the present invention is not limited to this. Further, the plug assist device 1 and the base 11 are disposed in the vacuum chamber 10. The interior of the vacuum chamber 10 can be heated from 80 degrees Celsius to 130 degrees Celsius.

  Next, a method for transferring the adhesive layer of the adhesive sheet 20 to the bonding object 24 by the plug assist device 1 will be described with reference to FIGS. 2A and 2B. First, the adhesive sheet 20 is placed so that the lower adhesive layer 23 of the adhesive sheet 20 contacts the object to be bonded 24. In this state, the vacuum chamber 10 is evacuated. The pressure difference between the outer side and the inner side of the adhesive sheet 20 disappears, and the adhesive sheet 20 comes into close contact with the object to be bonded 24. Here, the vacuum chamber is heated from 80 degrees Celsius to 130 degrees Celsius. Thereafter, as shown in FIG. 2B, the plug assist device 1 is moved (lowered) so that the bonding object 24 is inserted into the hole 2 together with the bonding sheet 20. By this movement of the plug assist device 1, the adhesive sheet 20 is pushed against the wall portion of the hole 2 of the plug assist device 1, and the gas remaining between the adhesive sheet 20 and the bonding object 24 is also pushed out and discharged. . This state is maintained for a predetermined time, and then the plug assist device 1 is raised. In this way, the lower adhesive layer 23 can be strongly fixed on the bonding object 24 by pressing the adhesive sheet 20 against the wall portion of the hole 2 of the plug assist device 1. The dimension of the hole 2 of the plug assist device 1 is set such that the adhesive sheet 20 is pressed when the bonding object 24 is inserted into the hole 2 together with the adhesive sheet 20. The gas remaining between the adhesive sheet 20 and the bonding object 24 can be discharged in advance at the stage of evacuation before the plug assist device 1 moves.

  Here, the vacuum chamber 10 is opened to atmospheric pressure, and a pressurized gas is introduced into the vacuum chamber 10. Since the gas remaining between the adhesive sheet 20 and the bonding target object 24 is discharged, the adhesive sheet 20 is further pressed against the bonding target object 24 due to the pressure difference by the pressurized gas. The point of time when the pressurized gas is introduced into the vacuum chamber 10 may be simultaneously with the process of lowering the plug assist device 1 and inserting the bonding object 24 into the hole 2 together with the bonding sheet 20.

  Thereby, it becomes possible to adhere | attach the adhesive bond layer (overcoat adhesive bond layer 22 and undercoat adhesive bond layer 23) of the adhesive sheet 20 to the one or more adhesive target objects 24 at once. Thereafter, when the film 21 of the adhesive sheet 20 is peeled off, the adhesive layers (the top adhesive layer 22 and the undercoat adhesive layer 23) of the adhesive sheet 20 are transferred to the adhesive object 24.

  The plug assist device 1 can have various forms. In FIG. 1, the shape is a flat plate in which a plurality of holes 2 into which the bonding object 24 can be inserted are formed. However, as long as the bonding object 24 has the hole 2 into which it can be inserted, the same effect is obtained. That is, as shown in FIG. 3, a plurality of cylinders 3 having holes 2 into which a bonding object 24 can be inserted can be arranged on a flat plate. Any form may be employed as long as the bonding object 24 is inserted into the hole 2 together with the adhesive sheet 20 when the plug assist device 1 is lowered.

  Further, the method of the present invention is not limited to the vertical movement of the plug assist device 1. For example, the form which moves to a horizontal direction may be sufficient. If the plug assist device 1 is moved so that the bonding object 24 can be inserted into the hole 2 together with the adhesive sheet 20, the moving direction of the plug assist device 1 is not limited to the vertical direction.

1 Plug Assist Device 2 Hole 3 Tube 10 Vacuum Chamber 11 Stand 20 Adhesive Sheet 21 Film 22 Topcoat Adhesive Layer 23 Undercoat Adhesive Layer 24 Bonding Object

Claims (3)

A transfer method for transferring an adhesive layer of an adhesive sheet to one or more objects to be bonded having side surfaces by a plug assist device,
The adhesive layer includes an overcoat adhesive layer and an undercoat adhesive layer, and the overcoat adhesive layer is a layer of an adhesive having reactivity with a rubber layer, and the undercoat adhesive layer is bonded to the object to be bonded. A layer of reactive adhesive,
The plug assist device includes a hole into which each of the one or more bonding objects can be inserted at a position corresponding to the one or more bonding objects,
The method
A bonding object placing step of placing the one or more bonding objects at a position corresponding to the hole of the plug assist device;
An adhesive sheet placing step of placing the adhesive sheet on the one or more adhesion objects in a state where the undercoat adhesive layer contacts the adhesion object on the one or more adhesion objects; ,
A pressing step of moving the plug assist device and maintaining the object to be bonded together with the adhesive sheet in the hole for a predetermined time;
Moving the plug assist device to pull out the bonding object from the hole;
A peeling step of peeling the film of the adhesive sheet;
A transfer method comprising:   The transfer method according to claim 1, wherein the pressing step is performed in a vacuum state.   The transfer method according to claim 1, wherein the pressing step is performed in a pressurized state.

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