JP2007038455A - Adhesion laminate, its production method, and heating/drying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing an adhesion laminate which can miniaturize a heating apparatus, curtail a heating time, improve productivity, and heat an adhesive uniformly. <P>SOLUTION: The method comprises: a process for obtaining a provisional adhesion body by superposing another material 3 on a metal sheet body 2 through an adhesive; and a heating process in which the metal sheet body 2 of the provisional adhesion body is contacted with a heat shielding sheet 35 arranged on the inner surface or at a position close to the inner surface of the constitution wall of a resonant chamber, by irradiating the inside of the resonant chamber with micro waves in this state, the metal sheet body 2 is heated by an induced current generated by the change of a magnetic field, the adhesive is heated/dried by the transfer of the heat, and the metal sheet body 2 and the other material 3 are bonded/integrated together. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a manufacturing method for obtaining an adhesive laminate by bonding and integrating other materials to a metal sheet body using an adhesive, and more particularly to a method for heating and drying an adhesive.

  In this specification, the term “aluminum” is used to include aluminum and its alloys. In addition, the term “metal” is used to include a simple metal and an alloy. The term “sheet” is used to include a sheet, a film, a foil, and a plate.

Conventionally, when manufacturing an adhesive laminate by bonding sheet-like substrates together with an adhesive, the adhesive is generally heat-dried by a dry oven. For example, Patent Document 1 describes that after applying an adhesive made of a thermosetting resin composition to the surface of a metal foil, the adhesive is heated and dried by passing through a drying furnace to produce a laminate. ing.
Japanese Patent Laid-Open No. 2004-25624

  However, when the adhesive is heat-dried by a dry oven as described in Patent Document 1, a large-sized heat-drying device is required and the heat-drying takes much time to produce. There was a problem that the performance decreased. In addition, heating by a dry oven has a problem that heating tends to be uneven.

  The present invention has been made in view of such a technical background, and it is possible to reduce the size of the heating equipment, reduce the heating time, improve productivity, and perform uniform heating of the adhesive. An object of the present invention is to provide a method for producing an adhesive laminate.

  In order to achieve the above object, the present inventor has conceived that the adhesive is heated and dried by irradiating microwaves when other materials are bonded and integrated to the metal sheet body using the adhesive. .

  However, in order to dry the adhesive applied to the surface of the metal sheet body, when the microwave is irradiated while the metal sheet body is inserted into the center of the cavity for microwave irradiation, sparks are generated in the metal sheet body. The adhesive could not be dried.

  As a result of diligent research, the present inventor has determined that the metal sheet body is a component wall of a cavity resonator that is irradiated with microwaves (a wall that separates the internal space and the outside of the cavity resonator, for example, the cavity resonator has a substantially rectangular solid shape). In this case, the metal sheet body can be heated by the induced current generated by the change of the magnetic field due to the microwave irradiation while preventing the occurrence of sparks by arranging the inner surface of the inner wall or the vicinity thereof. At this time, by disposing a heat shielding material (heat insulating material) such as a polyimide film between the metal sheet body and the constituent wall, it is possible to sufficiently prevent heat diffusion from the heated metal sheet body, The present invention has been completed by finding that it can be efficiently heated, and that the adhesive can be sufficiently dried by heating.

  That is, in order to achieve the above object, the present invention provides the following means.

[1] A step of superimposing another material on the metal sheet body via an adhesive to obtain a temporary adhesive body;
By placing the metal sheet body of the temporary adhesive body in contact with the heat shielding sheet disposed on the inner surface of the constituent wall of the cavity resonator or in the vicinity thereof, and irradiating the cavity resonator with microwaves in this state Heating the metal sheet body by an induced current generated by a change in the magnetic field, and heating and drying the adhesive by heat transfer to bond and integrate the metal sheet body and the other material. The manufacturing method of the adhesion laminated body characterized by including.

[2] A step of superimposing another sheet body on the metal sheet body with an adhesive to obtain a temporary adhesive body;
By placing the metal sheet body of the temporary adhesive body in contact with the heat shielding sheet disposed on the inner surface of the constituent wall of the cavity resonator or in the vicinity thereof, and irradiating the cavity resonator with microwaves in this state A heating step in which the metal sheet body is heated by an induced current generated by a change in the magnetic field, the adhesive is heated and dried by heat transfer, and the metal sheet body and the other sheet body are bonded and integrated. The manufacturing method of the adhesion laminated body characterized by including.

  [3] The method for producing an adhesive laminate according to item 1 or 2, wherein a water-based adhesive is used as the adhesive.

[4] A step of applying an adhesive to the metal sheet body;
By placing the non-coated surface of the metal sheet body in contact with a heat shielding sheet disposed at or near the inner surface of the constituent wall of the cavity resonator and irradiating the cavity resonator with microwaves in this state A heating step of heating the metal sheet body by an induced current generated by a change in magnetic field, and heating the adhesive by heat transfer;
A method of manufacturing an adhesive laminate, comprising the step of superimposing another material on the adhesive-coated surface of the metal sheet body and integrating them with each other.

[5] A step of applying an adhesive to the metal sheet body;
By placing the non-coated surface of the metal sheet body in contact with a heat shielding sheet disposed at or near the inner surface of the constituent wall of the cavity resonator and irradiating the cavity resonator with microwaves in this state A heating step of heating the metal sheet body by an induced current generated by a change in magnetic field, and heating the adhesive by heat transfer;
And a step of superimposing and integrating another sheet body on the adhesive-coated surface of the metal sheet body.

  [6] The method for producing an adhesive laminate according to item 4 or 5, wherein an organic solvent-type adhesive is used as the adhesive.

  [7] The method for producing an adhesive laminate according to any one of items 1 to 6, wherein the metal sheet body is made of an aluminum foil or an aluminum plate.

  [8] The method for producing an adhesive laminate according to any one of items 1 to 7, wherein a synthetic resin sheet is used as the heat shielding sheet.

  [9] The method for producing an adhesive laminate according to item 8, wherein the synthetic resin sheet is a polyimide sheet, a polyester sheet, or a polypropylene sheet.

  [10] The method for producing an adhesive laminate according to any one of items 1 to 9, wherein the heat shielding sheet has a thickness of 5 to 200 μm.

  [11] The cavity resonator is formed of a substantially rectangular parallelepiped metal container, and the heat shielding sheet is disposed on the inner surface of the bottom wall of the cavity resonator or in the vicinity thereof. Method for producing an adhesive laminate.

  [12] In the heating step, after preheating the adhesive by irradiating microwaves so that a heating rate of heating of the adhesive is in a range of 40 to 100 ° C./second, the preheating is performed. The adhesion according to any one of the preceding items 1 to 11, wherein the heat treatment of the adhesive is performed by irradiating with microwaves and performing main heating so that the heating temperature rising rate is lower than the heating temperature rising rate at the time. A manufacturing method of a layered product.

  [13] The method for manufacturing an adhesive laminate according to item 12, wherein a heating temperature rising rate of the adhesive during the main heating is 0.3 to 0.7 times a heating temperature rising rate during the preliminary heating.

  [14] An adhesive laminate manufactured by the manufacturing method according to any one of items 1 to 13.

  [15] A microwave generator for transmitting microwaves and a cavity resonator formed of a substantially rectangular parallelepiped metal container, and a heat shielding sheet is provided on the inner surface of the bottom wall of the cavity resonator or in the vicinity thereof. A heating and drying apparatus, wherein a slit for inserting a sheet is provided on a pair of side walls opposed to the cavity resonator.

  In the inventions of [1] and [2], the metal sheet body of the temporary adhesive body is disposed in contact with the heat shielding sheet disposed on the inner surface of the constituent wall of the cavity resonator or in the vicinity thereof, and the cavity resonator is maintained in this state. By irradiating the inside with microwaves, the metal sheet body can be heated by the induced current generated by the change of the magnetic field, and the adhesive can be heated and dried by the heat transfer, and the heat shielding sheet can be temporarily removed. By arranging the metal sheet body of the adhesive body in contact with the metal sheet, heat diffusion from the metal sheet can be suppressed and the metal sheet can be heated efficiently, so the heating time of the adhesive can be shortened and productivity can be improved, By shortening the heating time (heating distance), it is possible to reduce the size of the heating equipment and to realize uniform heating and drying of the adhesive. In addition, since the metal sheet and the adhesive are heated, there is an advantage that it is possible to avoid adverse effects (expansion and shrinkage, generation of wrinkles, etc.) due to heating on other constituent materials (other sheet bodies, etc.). is there.

  In the invention [3], an aqueous adhesive is used as the adhesive in the inventions [1] and [2]. [1] Since the production method [2] is a production method particularly suitable when a water-based adhesive is used, there is an advantage that productivity can be further improved.

  [4] In the invention of [5], the metal sheet body of the temporary adhesive body is placed in contact with the heat shielding sheet placed on the inner surface of the constituent wall of the cavity resonator or in the vicinity thereof, and in this state the cavity resonance occurs. By irradiating the inside of the vessel with microwaves, the metal sheet body can be heated by the induced current generated by the change of the magnetic field, and the adhesive can be heated and dried by the heat transfer. By disposing the non-coated surface of the metal sheet body in a contact state, heat diffusion from the metal sheet can be suppressed and the metal sheet can be heated efficiently, so the heating time of the adhesive can be shortened and productivity can be improved. By shortening the heating time (heating distance), the heating equipment can be reduced in size, and uniform heating and drying of the adhesive can be realized. In addition, since the metal sheet and the adhesive are heated, there is an advantage that it is possible to avoid adverse effects (expansion and shrinkage, generation of wrinkles, etc.) due to heating on other constituent materials (other sheet bodies, etc.). is there.

  In the invention of [6], an organic solvent type adhesive is used as the adhesive in the inventions of [4] and [5]. [4] Since the production method [5] is a production method particularly suitable when an organic solvent-type adhesive is used, there is an advantage that productivity can be further improved.

  In the invention of [7], as an adhesive laminate using a metal sheet body made of an aluminum foil or an aluminum plate, a high quality product in which the adhesive is uniformly heated and dried can be produced with high productivity.

  In the invention of [8], since the synthetic resin sheet is used as the heat shielding sheet, the thermal diffusion from the metal sheet can be sufficiently prevented.

  In the invention of [9], since a polyimide sheet, a polyester sheet or a polypropylene sheet is used as the heat shielding sheet, it is possible to prevent heat diffusion from the metal sheet more sufficiently, thereby further reducing the heating time and producing. The property can be further improved.

  In the invention [10], since the thickness of the heat shielding sheet is 5 to 200 μm, the adhesive can be heated more sufficiently.

  In the invention of [11], since the heat shielding sheet is disposed on the inner surface of the bottom wall of the cavity resonator made of a substantially rectangular parallelepiped metal container or in the vicinity thereof, the heat shielding sheet is maintained while maintaining the metal sheet in a substantially horizontal state. Therefore, the uneven distribution of the applied adhesive can be sufficiently prevented, and as a result, uniform adhesive strength can be ensured.

  In the invention of [12], after preheating the adhesive by irradiating the microwave so that the heating rate of heating of the adhesive is in the range of 40 to 100 ° C./second, the heating during the preheating is performed. The adhesive is heated and dried by irradiating with microwaves so that the heating rate is lower than the rate of temperature increase. The two-step heating of preheating and main heating is performed. By performing the above, it is possible to sufficiently prevent wrinkles from being generated at the bonded portion, and it is possible to manufacture a high-quality bonded laminate.

  According to the invention [13], wrinkles can be reliably prevented from occurring at the bonded portion.

  In the invention of [14], the adhesive is uniformly heated and dried to have excellent adhesion durability, and adverse effects (expansion and shrinkage, generation of wrinkles, etc.) due to heating are exerted on other constituent materials (other sheet bodies, etc.). A high quality adhesive laminate is provided.

  In the invention [15] (heat drying apparatus), when other materials are bonded and integrated to the metal sheet body via an adhesive, the heat shielding sheet is fixed to the inner surface of the bottom wall of the cavity resonator or a position in the vicinity thereof. By irradiating the cavity resonator with microwaves in a state where the non-coated surface of the metal sheet body is in contact with the metal sheet body, the metal sheet body is heated by the induced current generated by the change of the magnetic field, and the heat transfer The adhesive can be heated and dried, and the metal sheet body can be brought into contact with the heat shielding sheet, so that the heat diffusion from the metal sheet can be suppressed and the metal sheet can be heated efficiently. Can be shortened and productivity can be improved, and the heating time (heating distance) can be shortened to reduce the size of the heating and drying apparatus, and uniform heating and drying of the adhesive can be realized.Further, in this heating and drying apparatus, since the metal sheet and the adhesive are heated, adverse effects (expansion and shrinkage, generation of wrinkles, etc.) due to heating are exerted on other constituent materials (other sheet bodies, etc.). There is an advantage that can be avoided.

  In the manufacturing method of the adhesive laminate (1) according to the present invention, when the adhesive laminate is obtained by bonding and integrating the other material (3) to the metal sheet body (2) using an adhesive, the cavity resonator (33 The metal sheet body (2) is placed in contact with the heat shielding sheet (35) disposed on the inner surface of the constituent walls (side wall, bottom wall, etc.) or in the vicinity thereof, and in this state the cavity resonator (33 ) Is irradiated with microwaves, the metal sheet body (2) is heated by an induced current generated in the metal sheet body (2) due to a change in the magnetic field, and the heat transfer to the adhesive causes the adhesive Heat drying is performed. In general, the electric field distribution in the cavity resonator (33) is maximum in the central portion in the radial direction and weakened in the peripheral portion, whereas the magnetic field distribution in the cavity resonator (33) is in the radial direction. Weak in the center and maximum in the periphery. Therefore, for example, when a metal sheet body is arranged in the center of the cavity resonator (33) and irradiated with microwaves, the center position of such a cavity resonator (33) has a strong electric field. In contrast, in the present invention, a metal sheet body (on the inner surface of the constituent wall of the cavity resonator (33) with little or no electric field (strong magnetic field) or in the vicinity thereof is generated. Since 2) is arranged, the metal sheet body (2) can be heated by the induced current generated by the change of the magnetic field, as well as no spark is generated, and the heat is transferred to the adhesive for bonding. The agent can be dried by heating. The microwave is an electromagnetic wave having a frequency range of 300 MHz to 30 GHz.

  This production method is used when, for example, another sheet body (3) is bonded and integrated with the metal sheet body (2) using an adhesive to obtain an adhesive laminate (1). It is not limited to. Examples of the other material include ink and paint other than the sheet body.

  The first manufacturing method of the present invention will be described. The first manufacturing method includes a bonding step of superimposing another material (3) on a metal sheet body (2) via an adhesive to obtain a temporary adhesive body, and an inner surface of a constituent wall of the cavity resonator (33). Alternatively, the metal sheet body (2) of the temporary adhesive body is placed in contact with the heat shielding sheet (35) disposed in the vicinity thereof, and microwaves are irradiated into the cavity resonator (33) in this state. Thus, the metal sheet body (2) is heated by the induced current generated by the change of the magnetic field, and the adhesive is heated and dried by heat transfer, thereby the metal sheet body (2) and the other material (3). And a heating and drying step in which the two are bonded and integrated.

  According to the first manufacturing method, the metal sheet body (2) of the temporary adhesive body is brought into contact with the heat shielding sheet (35) disposed on the inner surface of the constituent wall of the cavity resonator (33) or in the vicinity thereof. Since the microwave is irradiated into the cavity resonator in the arranged state, the metal sheet (2) can be heated by the induced current generated by the change of the magnetic field, and the adhesive is heated and dried by the heat transfer. It can be shown. At this time, since the metal sheet body (2) of the temporarily bonded body is placed in contact with the heat shielding sheet (35), the heat diffusion from the metal sheet body (2) can be suppressed, and the metal sheet body (2). Can be efficiently heated, shortening the heating time and improving productivity, and shortening the heating time (heating distance) makes it possible to reduce the size of the heating equipment and make the adhesive uniform. Heat drying can be realized. Moreover, since it is a metal sheet (2) and an adhesive agent to be heated, it has a bad influence (expansion shrinkage, generation | occurrence | production of wrinkles, etc.) by heating with respect to other structural materials (3) (other sheet bodies etc.). There is an advantage that can be avoided.

  In the first manufacturing method, the heat treatment of the adhesive is preferably performed as follows. That is, in the heating and drying step, after preheating the adhesive by irradiating microwaves so that the heating rate of heating of the adhesive is in a range of 40 to 100 ° C./second, the preheating is performed. It is preferable to perform the heat treatment of the adhesive by irradiating with microwaves and performing main heating so that the heating temperature rising rate is lower than the heating temperature rising rate at that time. By performing such preheating and main heating in two stages, it is possible to sufficiently prevent wrinkling from occurring at the bonded portion. Rather than performing the preheating and the main heating in two steps, it is not preferable if the heating temperature is rapidly increased in one step to the drying temperature of the adhesive because wrinkles may occur at the bonding site. . The heating rate of heating of the adhesive during the main heating is more preferably set in a range of 0.3 to 0.7 times the heating rate of heating during the preliminary heating. It is in the range of 0.4 to 0.6 times the heating temperature increase rate during heating. Moreover, it is more preferable that the heating rate of the adhesive during the preliminary heating is 40 to 80 ° C./second.

  A preferred embodiment of the first manufacturing method will be described with reference to FIG. First, as shown in FIG. 1, after an adhesive is applied to the upper surface of the metal sheet body (2) by bringing the metal sheet body (2) into contact with the coating roll (21), another sheet body is applied to the coated surface. Inserting between a pair of heating and pressing rolls (22) and (22) while laminating (3), the two sheet bodies (2) and (3) are bonded together to obtain a temporary adhesive sheet (bonding step). In addition, (20) is an adhesive pan filled with an adhesive.

  An example of the heat drying apparatus (30) used in the next heat drying step is shown in FIGS. In these drawings, (31) is a microwave generating section, (32) is a microwave introducing section, and (33) is a cavity resonator.

  The cavity resonator (33) is made of a metal container, and the metal container has a substantially rectangular parallelepiped shape. A microwave introduction part (32) is provided on the upper wall of the cavity resonator (33) (see FIG. 5), and a microwave generation part (31) is disposed above the microwave introduction part (32). . Further, slits (34) and (34) for inserting sheets are provided at the lower ends of the pair of side walls facing each other of the cavity resonator (33) (see FIGS. 3 and 5). A heat shielding sheet (35) is fixed to the inner surface of the bottom wall of the cavity resonator (33). The microwave generated by the microwave generation unit (31) is guided into the cavity resonator (33) through the microwave introduction unit (32).

  In the cavity resonator (33), as shown in FIGS. 3 and 5, the heated sheet body (36) passes through the one slit (34) and then the inner surface of the bottom wall of the cavity resonator (33). It moves in the cavity resonator (33) in contact with the heat shielding sheet (35) fixed to the surface, passes through the other slit (34), and exits from the cavity resonator (33). At this time, as shown in FIG. 4, the left and right edge portions (both edge portions in the direction perpendicular to the insertion movement direction of the heated sheet body) of the heat shielding sheet (35) are the width of the heated sheet body (36). It is preferable that they are arranged so as to protrude outward from both end edges in the direction (direction perpendicular to the insertion movement direction). Examples of the heated sheet body (36) include a metal sheet body coated with an adhesive in addition to the temporary adhesive sheet.

  Thus, a microwave preheating unit (11) comprising the heating and drying device (30), a microwave main heating unit (12) comprising the heating and drying device (30), a precooling unit (13) and a main cooling unit ( 14) constitutes the manufacturing apparatus (10).

  Each heating temperature increase rate in the microwave preheating unit (11) and the microwave main heating unit (12) can be controlled by adjusting the output of the microwave generation unit (31). In the microwave preheating part (11), it is preferable to adjust the heating temperature rising rate of the adhesive to be in the range of 40 to 100 ° C./second by microwave irradiation. In the microwave main heating section (12), it is preferable to adjust the heating rate of the adhesive by microwave irradiation so that it is lower than the heating rate of heating during the preliminary heating.

  Thus, in the next heat drying step, the temporary adhesive sheet obtained in the pasting step is subjected to the microwave preheating unit (11), the microwave main heating unit (12), the precooling unit (13), and the main cooling. Drying and cooling are performed by sequentially passing through the part (14) to obtain the bonded laminate (1).

  In the first production method, the other sheet body (3) is not particularly limited, and examples thereof include paper, paperboard, plastic sheet, cellophane sheet, cloth, and glass cloth. In the first manufacturing method, the other sheet body (3) does not include a metal sheet.

  In the first production method, the method for applying the adhesive is not particularly limited, but it is preferable to use a wet lamination method. In the wet lamination method, for example, a water-based adhesive such as a water-soluble adhesive or a water-dispersed adhesive is applied to the metal sheet body (2), and the applied surface of the applied adhesive is dried. In this method, after other materials (other sheet bodies, etc.) (3) are bonded together, they are heat-dried to remove the moisture contained in the adhesive, and then bonded and integrated. Of course, the water-based adhesive is applied to the other material (3), and the metal sheet body (2) is bonded before the coated surface of the applied adhesive is dried, and then dried by heating. Bonding and integration may be performed.

  The water-based adhesive is not particularly limited, and examples thereof include a polyvinyl acetate emulsion, an acrylic copolymer emulsion, and a polyurethane emulsion.

  Next, the second manufacturing method of the present invention will be described. In the second manufacturing method, the metal sheet (2) is coated with an adhesive, and the metal is applied to the heat shielding sheet (35) disposed on the inner surface of the constituent wall of the cavity resonator (33) or in the vicinity thereof. By placing the non-coated surface of the sheet body (2) in a contact state and irradiating microwaves into the cavity resonator (33) in this state, the metal sheet body (2) is induced by an induced current generated by a change in the magnetic field. ) And heating the adhesive by heat transfer, and superimposing another material (3) on the adhesive application surface of the metal sheet body (2) and integrating them together It is characterized by including.

  According to this second manufacturing method, the non-coated surface of the metal sheet body (2) is brought into contact with the heat shielding sheet (35) disposed on the inner surface of the constituent wall of the cavity resonator (33) or in the vicinity thereof. Since the microwave is irradiated into the cavity resonator (35) in the arranged state, the metal sheet (2) can be heated by the induced current generated by the change of the magnetic field, and the adhesive transfers by the heat transfer. Can be dried by heating. At this time, by disposing the non-coated surface of the metal sheet body (2) in contact with the heat shielding sheet (35), heat diffusion from the metal sheet body (2) can be suppressed, and the metal sheet body (2 ) Can be efficiently heated, the heating time can be shortened and productivity can be improved, and the heating time (heating distance) can be shortened to reduce the size of the heating equipment. Uniform heat drying can be realized. Moreover, since it is a metal sheet (2) and an adhesive agent to be heated, it has a bad influence (expansion shrinkage, generation | occurrence | production of wrinkles, etc.) by heating with respect to other structural materials (other sheet bodies etc.) (3). There is an advantage that can be avoided.

  In the second manufacturing method, the heat treatment of the adhesive is preferably performed as follows. That is, in the heating step, after preheating the adhesive by irradiating microwaves so that the heating rate of heating of the adhesive is in the range of 40 to 100 ° C./second, It is preferable to perform the heat drying treatment of the adhesive by irradiating with microwaves and performing main heating so that the heating temperature raising rate is lower than the heating temperature raising rate. By performing such preheating and main heating in two stages, it is possible to sufficiently prevent wrinkling from occurring at the bonded portion. Rather than performing the preheating and the main heating in two steps, it is not preferable if the heating temperature is rapidly increased in one step to the drying temperature of the adhesive because wrinkles may occur at the bonding site. . The heating rate of heating of the adhesive during the main heating is more preferably set in a range of 0.3 to 0.7 times the heating rate of heating during the preliminary heating. It is in the range of 0.4 to 0.6 times the heating temperature increase rate during heating. Moreover, it is more preferable that the heating rate of the adhesive during the preliminary heating is 40 to 80 ° C./second.

  A preferred embodiment of the second manufacturing method will be described with reference to FIG. First, as shown in FIG. 2, the adhesive is applied to the upper surface of the metal sheet body (2) by bringing the metal sheet body (2) into contact with the application roll (21) (application process). In addition, (20) is an adhesive pan filled with an adhesive.

  As the heating and drying apparatus used in the next heating step, the heating and drying apparatus (30) shown in FIGS. 3 to 5 is used as in the first manufacturing method. That is, the microwave preheating part (11) comprising the heating and drying apparatus (30), the microwave main heating part (12) comprising the heating and drying apparatus (30), the precooling part (13) and the main cooling part (14). ) Constitutes a manufacturing apparatus (10).

  Each heating temperature increase rate in the microwave preheating unit (11) and the microwave main heating unit (12) can be controlled by adjusting the output of the microwave generation unit (31). In the microwave preheating part (11), it is preferable to adjust the heating temperature rising rate of the adhesive to be in the range of 40 to 100 ° C./second by microwave irradiation. In the microwave main heating section (12), it is preferable to adjust the heating rate of the adhesive by microwave irradiation so that it is lower than the heating rate of heating during the preliminary heating.

  Thus, in the next heating step, the metal sheet body (2) that has undergone the coating step is subjected to the microwave preheating unit (11), the microwave main heating unit (12), the precooling unit (13), and the main cooling unit. (14) The adhesive is dried and cooled by sequentially passing through the inside.

  Next, while the other sheet body (3) is superimposed on the adhesive application surface of the metal sheet body (2), it is inserted between a pair of heating and pressing rolls (22) and (22) and both sheet bodies (2) ( 3) is bonded and integrated to obtain the bonded laminate (1).

  In the second production method, the other sheet body (3) is not particularly limited, and examples thereof include cellophane sheets, plastic sheets (PET sheets, nylon sheets, polypropylene sheets, etc.), metal sheets and the like. .

  In the second production method, the method for applying the adhesive is not particularly limited, but it is preferable to use a dry lamination method. In the dry lamination method, for example, an organic solvent-type adhesive is applied to the metal sheet body (2), followed by heat drying to remove the organic solvent contained in the adhesive, and then another material (another sheet). Body etc.) (3) is bonded and integrated by heating and pressing.

  Although it does not specifically limit as said organic solvent type adhesive agent, For example, 1 liquid type adhesive agent (the thing dissolved in the solvent) which consists of a prepolymer which has an isocyanate group, or polyether polyol, polyester Examples thereof include a two-component adhesive (dissolved in a solvent) composed of a main agent selected from the group consisting of polyols, these urethane-modified products, and epoxy-modified products, and a curing agent having an isocyanate group.

  In the first and second production methods of the present invention, the metal sheet body (2) is not particularly limited. For example, an aluminum foil, an aluminum plate, a copper foil, a copper plate, a nickel foil, a nickel plate, SUS Examples include (stainless steel) foil, SUS (stainless steel) plate, and alloy foils and alloy plates thereof.

  Moreover, in this invention, as said heat shielding sheet (35), if it can shield heat, it will not specifically limit, For example, synthetic resin sheets, such as a polyimide sheet, a polyester sheet, a polypropylene sheet, etc. are mentioned. The thickness of the heat shielding sheet (35) is preferably 5 to 200 μm. When the thickness is 5 μm or more, a sufficient heat shielding effect can be realized and the adhesive can be sufficiently heated. When the thickness is 200 μm or less, the metal sheet body (2) is placed in the cavity resonator (33). Therefore, the metal sheet (2) can be sufficiently heated and the adhesive can be sufficiently heated.

  Moreover, in this invention, although the shape of the said cavity resonator (33) is not specifically limited, It is preferable that the said cavity resonator (33) consists of a substantially rectangular parallelepiped metal container. In this case, since the microwave reflection characteristics in the cavity resonator (33) are improved, the heating efficiency of the adhesive can be further increased.

  Next, specific examples of the present invention will be described, but the present invention is not particularly limited to these examples.

<Example 1>
After applying a polyvinyl acetate emulsion (containing 30% by weight of solid content) to a 15 μm thick aluminum foil to a thickness of 10 μm, a pair of heat and pressure is applied while 35 g / m ² roll paper (pure white) is superimposed on the coated surface. It inserted between rolls and bonded together to obtain a temporary adhesive sheet (temporary adhesive body). Next, this temporary adhesive sheet is heated by a microwave preheating unit (11) including a heating / drying apparatus (30) illustrated in FIGS. 3 to 5 and a microwave main heating including a heating / drying apparatus (30) illustrated in FIGS. A drying process and a cooling process were performed by sequentially passing through the part (12), the preliminary cooling part (13), and the main cooling part (14) to obtain an adhesive laminate (1) (see FIG. 1). That is, in Example 1, the wet lamination method was used. In the heating section, the microwave output with a frequency of 2.45 GHz was adjusted to 200 W in the microwave preheating section and 100 W in the microwave main heating section. A polyimide film having a thickness of 50 μm was used as the heat shielding sheet (35) in the heat drying apparatus (30). Further, when the temporary adhesive sheet was passed through the heating and drying apparatus (30), the aluminum foil of the temporary adhesive sheet was allowed to pass in a state of being in contact with the heat shielding sheet (35).

<Example 2>
After applying a prepolymer having an isocyanate group (polyester polyurethane polyisocyanate) having a thickness of 10 μm to an aluminum foil having a thickness of 15 μm, this was applied to a microwave preheating unit (30) comprising a heating and drying apparatus (30) shown in FIGS. 11), drying process and cooling by sequentially passing through the microwave main heating unit (12), the pre-cooling unit (13), and the main cooling unit (14) including the heating and drying apparatus (30) shown in FIGS. Then, the cellophane film having a thickness of 20 μm is superposed on the coated and dried surface, and the sheet is inserted and bonded between a pair of heat and pressure rolls (80 ° C., linear pressure 20 kg / cm). Was obtained (see FIG. 2). That is, in Example 2, the dry lamination method was used. In the heating section, the microwave output with a frequency of 2.45 GHz was adjusted to 200 W in the microwave preheating section and 100 W in the microwave main heating section. A polyimide film having a thickness of 50 μm was used as the heat shielding sheet (35) in the heat drying apparatus (30). Moreover, when letting a temporary adhesive sheet pass in a heating-drying apparatus (30), it was made to pass in the state which the aluminum foil of a temporary adhesive sheet contact | abutted with the said heat shielding sheet (35).

<Example 3>
An adhesive laminate (1) was obtained in the same manner as in Example 2 except that a copper foil having a thickness of 10 μm was used instead of the aluminum foil having a thickness of 15 μm.

<Comparative Example 1>
An adhesive laminate was obtained in the same manner as in Example 1 except that instead of microwave irradiation (microwave preheating / main microwave heating), drying was performed by dry oven heating, which is a conventional drying method. . The temperature of the dry oven heating was set to a preheating unit of 100 ° C. and a main heating unit of 150 ° C.

<Comparative example 2>
An adhesive laminate was obtained in the same manner as in Example 2 except that instead of microwave irradiation (microwave preheating / microwave main heating), drying was performed by dry oven heating, which is a conventional drying method. . The temperature of the dry oven heating was set to 100 ° C. for the preheating unit and 120 ° C. for the main heating unit.

<Comparative Example 3>
An adhesive laminate was obtained in the same manner as in Example 1 except that the arrangement of the heat shielding sheet (35) in the heat drying apparatus (30) was omitted.

<Comparative example 4>
Example 1 except that when the temporary adhesive is passed through the heating and drying apparatus (30), the intermediate position of the height in the heating and drying apparatus (30) (the position where the electric field is strongest) is passed. Similarly, an adhesive laminate was obtained.

  In Examples 1 to 3 and Comparative Examples 1 to 4, the temperature rising rate of the solvent was measured at three locations of position A, position B, and position C during heat drying. These results are shown in Table 1. In both the drying process and the cooling process, a position that is ¼ from the one end in the width direction at the center in the scanning direction of the sheet is defined as position A, and a position that is ¼ from the one end in the width direction is defined as position B. The position of 3/4 was defined as position C.

  As a result of conducting a peeling test to evaluate the adhesion after drying, the adhesive laminates of Examples 1 to 3 and Comparative Examples 1 and 2 were obtained for each of the adhesive laminates obtained as described above. There was no problem in adhesion.

  As is apparent from Table 1, in Examples 1 to 3 produced by the production method of the present invention, the heating rate of heating was significantly larger than that of Comparative Examples 1 to 3, and the total drying time could be greatly shortened. did it. Further, in Examples 1 to 3, there was almost no variation in the heating rate of heating between the positions A, B, and C, and uniform heating could be realized. Moreover, generation | occurrence | production of wrinkles was not recognized in the adhesion laminated body of Examples 1-3. In mass production on a normal production line, it is common to unwind a roll-shaped sheet, let it pass through a drying facility at a constant feed rate, and then wind it up. If possible, the drying equipment can be greatly reduced in size.

  On the other hand, in Comparative Examples 1 and 2, the heating rate was small and a long time was required for drying, and the heating was not uniform. In Comparative Example 3, the adhesive could not be dried by heating. Moreover, in the comparative example 4, it sparked and led to ignition.

  Although the use of the adhesion laminated body manufactured by the manufacturing method of this invention is not specifically limited, For example, a battery sheet material, an IC tag, a cap seal, etc. are mentioned.

It is a side view which shows an example of the manufacturing apparatus used with the manufacturing method of this invention. It is a side view which shows the other example of the manufacturing apparatus used with the manufacturing method of this invention. It is a perspective view which shows an example of the heat drying apparatus of this invention. It is sectional drawing of the XX line in FIG. It is sectional drawing of the YY line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Adhesion laminated body 2 ... Metal sheet body 3 ... Sheet body 11 ... Microwave preheating part 12 ... Microwave main heating part 30 ... Heating and drying apparatus 31 ... Microwave generation part 33 ... Cavity resonance part 34 ... Slit 35 ... Heat Shielding sheet

Claims (15)

A step of superimposing another material on the metal sheet body via an adhesive to obtain a temporary bonded body;
By placing the metal sheet body of the temporary adhesive body in contact with the heat shielding sheet disposed on the inner surface of the constituent wall of the cavity resonator or in the vicinity thereof, and irradiating the cavity resonator with microwaves in this state Heating the metal sheet body by an induced current generated by a change in the magnetic field, and heating and drying the adhesive by heat transfer to bond and integrate the metal sheet body and the other material. The manufacturing method of the adhesion laminated body characterized by including. A step of superimposing another sheet body on the metal sheet body with an adhesive to obtain a temporary adhesive body;
By placing the metal sheet body of the temporary adhesive body in contact with the heat shielding sheet disposed on the inner surface of the constituent wall of the cavity resonator or in the vicinity thereof, and irradiating the cavity resonator with microwaves in this state A heating step in which the metal sheet body is heated by an induced current generated by a change in the magnetic field, the adhesive is heated and dried by heat transfer, and the metal sheet body and the other sheet body are bonded and integrated. The manufacturing method of the adhesion laminated body characterized by including.   The method for producing an adhesive laminate according to claim 1, wherein a water-based adhesive is used as the adhesive. Applying an adhesive to the metal sheet body;
By placing the non-coated surface of the metal sheet body in contact with a heat shielding sheet disposed at or near the inner surface of the constituent wall of the cavity resonator and irradiating the cavity resonator with microwaves in this state A heating step of heating the metal sheet body by an induced current generated by a change in magnetic field, and heating the adhesive by heat transfer;
A method of manufacturing an adhesive laminate, comprising the step of superimposing another material on the adhesive-coated surface of the metal sheet body and integrating them with each other. Applying an adhesive to the metal sheet body;
By placing the non-coated surface of the metal sheet body in contact with a heat shielding sheet disposed at or near the inner surface of the constituent wall of the cavity resonator and irradiating the cavity resonator with microwaves in this state A heating step of heating the metal sheet body by an induced current generated by a change in magnetic field, and heating the adhesive by heat transfer;
And a step of superimposing and integrating another sheet body on the adhesive-coated surface of the metal sheet body.   The method for producing an adhesive laminate according to claim 4 or 5, wherein an organic solvent-type adhesive is used as the adhesive.   The said metal sheet body consists of aluminum foil or an aluminum plate, The manufacturing method of the adhesion laminated body of any one of Claims 1-6 characterized by the above-mentioned.   The manufacturing method of the adhesion laminated body of any one of Claims 1-7 which uses a synthetic resin sheet as the said heat shielding sheet.   The method for producing an adhesive laminate according to claim 8, wherein the synthetic resin sheet is a polyimide sheet, a polyester sheet, or a polypropylene sheet.   The method for producing an adhesive laminate according to any one of claims 1 to 9, wherein the heat shielding sheet has a thickness of 5 to 200 µm.   The said cavity resonator consists of a substantially rectangular parallelepiped metal container, The said heat shielding sheet is arrange | positioned in the inner surface of the bottom face wall of this cavity resonator, or its vicinity position, The adhesion | attachment of any one of Claims 1-10. A manufacturing method of a layered product.   In the heating step, after preheating the adhesive by irradiating microwaves so that the heating rate of heating of the adhesive is in the range of 40 to 100 ° C./second, heating during the preheating is performed. The adhesive laminate according to any one of claims 1 to 11, wherein the adhesive is heat-treated by irradiating with microwaves and performing main heating so that the heating temperature rise rate is lower than the temperature rise rate. Manufacturing method.   The method for producing an adhesive laminate according to claim 12, wherein a heating temperature rising rate of the adhesive during the main heating is 0.3 to 0.7 times a heating temperature rising rate during the preliminary heating.   The adhesion laminated body manufactured by the manufacturing method of any one of Claims 1-13.   A microwave generation unit for transmitting microwaves and a cavity resonator made of a substantially rectangular parallelepiped metal container, and a heat shielding sheet is fixed to the inner surface of the bottom wall of the cavity resonator or a position in the vicinity thereof, A heating and drying apparatus, wherein a pair of side walls facing each other of the cavity resonator are provided with slits for sheet insertion.

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