Sheet processing apparatus

Abstract

To provide a sheet processing device capable of suppressing wrinkles caused by a temperature change and shortening an aging period SOLUTION: A first unwinding unit 1 configured to unwind a first sheet S1 from a first original sheet R1 around which the first sheet S1 is wound, a second unwinding unit 2 configured to unwind a second sheet S2 from a second original sheet R2 around which the second sheet S2 is wound, a coating treatment unit 3 configured to coat the first sheet S1 with a heat-curable resin-containing composition to form a coating layer, a heat-treatment unit configured to heat-treat the first sheet S1 on which the coating layer is formed, and a heat-treatment unit configured to heat-treat the first sheet S1 and the second sheet after the heat-treatment. S2, the sheet processing device includes a laminate processing part 5 for obtaining a composite sheet S3 by laminating via the coating layer, a winding part 6 for winding the composite sheet S3, and a heat insulating member X arranged so as to cover at least the winding part 6 and the composite sheet S3 wound by the winding part 6.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a sheet processing apparatus that performs a predetermined process on a sheet. [Background technology]

[0002] Conventionally, thermosetting resin compositions have been used as materials for adhesive layers, protective layers, etc. For example, in laminating devices that use a thermosetting resin composition as an adhesive to bond a first sheet and a second sheet, the adhesive diluted with a solvent is applied to the first sheet, the adhesive is dried with a dryer, and then the first sheet and the second sheet are bonded together. After that, a heating period (aging period) is set at a constant temperature to improve the adhesion between the adhesive and the sheets and to promote the hardening of the adhesive, ensuring the development of adhesive performance.

[0003] Patent Document 1 discloses a laminating apparatus for manufacturing a composite substrate by bonding at least a first substrate and a second substrate with an adhesive, the laminating apparatus comprising: an application means for applying adhesive to the first and / or second substrate, a bonding means for bonding the first substrate and the second substrate, a heating means for uniformly maintaining the temperature of the composite substrate, and a winding means for winding up the heated composite substrate. Patent Document 1 also describes that the composite substrate can be preheated before being transferred to an aging room, thereby shortening the aging period.

[0004] Patent Document 2 discloses a supply device including a first roll that supplies a first sheet material containing fibers, a second roll that supplies a second sheet material containing nonwoven fabric and different from the first sheet material, a third roll that supplies a third sheet material containing fibers and different from the second sheet material, and a discharge section that discharges a laminated sheet formed by sandwiching the second sheet material between the first sheet material and the third sheet material.Patent Document 2 also describes providing an insulating transport path between the supply section and a crushing section that crushes the fiber-containing raw material, by covering the sheet material cooled to a temperature lower than the glass transition temperature of the adhesive in the chemically bonded nonwoven fabric with an insulating material. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-103027 [Patent Document 2] Japanese Patent Application Publication No. 2020-180408 Summary of the Invention [Problem to be solved by the invention]

[0006] A longer aging period can lead to increased storage space and lead times, potentially reducing production efficiency. Patent Document 1 aims to shorten the aging period by providing a laminating device with multiple heating processes aimed at improving adhesion between the adhesive and the substrate and accelerating adhesive curing. However, because the sheet's temperature is lowered after one heating process before it is transported to the next, there is a production problem of large temperature changes in the sheet, which can lead to wrinkles due to thermal shrinkage and thermal expansion.

[0007] The present disclosure is an invention made in consideration of the above circumstances, and its main purpose is to provide a sheet processing apparatus that can suppress wrinkles that occur due to temperature changes in sheets and can shorten the aging period. [Means for solving the problem]

[0008] One embodiment of the present disclosure provides a sheet processing device having a first unwinding section that unwinds a first sheet from a first raw roll around which the first sheet is wound, a second unwinding section that unwinds a second sheet from a second raw roll around which the second sheet is wound, a coating processing section that applies a thermosetting resin composition to the first sheet to form a coating layer, a heat processing section that heat-treats the first sheet on which the coating layer has been formed, a laminating processing section that bonds the first sheet and the second sheet after the heat treatment via the coating layer to obtain a composite sheet, a winding section that winds up the composite sheet, and a heat-insulating member that is arranged to cover at least the winding section and the composite sheet wound up on the winding section.

[0009] Another embodiment of the present disclosure provides a sheet processing device having an unwinding section that unwinds the sheet from a roll on which the sheet is wound, a coating processing section that applies a thermosetting resin composition to the sheet to form a coating layer, a heat processing section that heat-treats the sheet on which the coating layer has been formed, a winding section that winds up the sheet after the heat treatment, and a heat-insulating member that is arranged to cover at least the winding section and the sheet wound up on the winding section. [Effects of the Invention]

[0010] According to the present disclosure, it is possible to provide a sheet processing apparatus that can suppress wrinkles that occur due to temperature changes in a sheet and can shorten the aging period. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a schematic diagram illustrating an example of a sheet processing apparatus according to a first embodiment of the present disclosure. [Figure 2] 1A and 1B are a schematic diagram showing an example of a conventional sheet processing apparatus and a graph showing the thermal history of a sheet. [Figure 3] 6 is a graph showing the thermal history of a sheet when the sheet processing apparatus according to the first embodiment of the present disclosure is used. [Figure 4]1 is a schematic diagram illustrating an example of a sheet processing apparatus according to a first embodiment of the present disclosure. [Figure 5] FIG. 10 is a schematic diagram illustrating an example of a sheet processing apparatus according to a second embodiment of the present disclosure. [Figure 6] 1 is a schematic diagram illustrating an example of a sheet processing apparatus according to a first embodiment of the present disclosure. [Figure 7] 1 is a schematic diagram illustrating an example of a sheet processing apparatus according to a first embodiment of the present disclosure. [Figure 8] 1 is a schematic diagram illustrating an example of a sheet processing apparatus according to a first embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0012] Embodiments of the present disclosure will be described below with reference to the drawings and the like. However, the present disclosure can be implemented in many different forms, and should not be construed as being limited to the description of the embodiments exemplified below. Furthermore, to clarify the explanation, the drawings may schematically depict the width, thickness, shape, etc. of each part compared to the actual form, but these are merely examples and are not intended to limit the interpretation of the present disclosure. Furthermore, in this specification and each drawing, elements similar to those previously described with reference to the preceding drawings will be designated by the same reference numerals, and detailed descriptions may be omitted as appropriate.

[0013] In this specification, when describing a mode in which another component is placed on a certain component, the terms "above" or "below" are used, unless otherwise specified, to include both a case in which another component is placed directly above or below a certain component so as to be in contact with the component, and a case in which another component is placed above or below a certain component with another component interposed therebetween. Also, in this specification, when describing a mode in which another component is placed on the surface of a certain component, the terms "on the surface side" or "on the surface" are used, unless otherwise specified, to include both a case in which another component is placed directly above or below a certain component so as to be in contact with the component, and a case in which another component is placed above or below a certain component with another component interposed therebetween.

[0014] The sheet processing apparatus of the present disclosure is roughly divided into a first embodiment and a second embodiment, each of which will be described in detail below.

[0015] A. First embodiment FIG. 1 is a schematic diagram illustrating an example of a sheet processing apparatus according to this embodiment. The sheet processing apparatus 10A in this embodiment performs coating, heating, and laminating processes on a sheet. The sheet processing apparatus 10A includes a first unwinding section 1 that unwinds a first sheet S1 from a first web R1, a second unwinding section 2 that unwinds a second sheet S2 from a second web R2, a coating processing section 3 that applies a thermosetting resin composition T to the first sheet S1 to form a coating layer, a heat processing section 4 that heats the first sheet S1 with the coating layer formed thereon, a laminating section 5 that bonds the first sheet S1 and the second sheet S2 after the heat treatment via the coating layer to obtain a composite sheet S3, a winding section 6 that winds up the composite sheet S3, and a heat-insulating member X that is positioned to cover at least the winding section 6 and the composite sheet S3 wound around the winding section 6. The upstream end Xs of the heat-insulating member X in FIG. 1 is located between the heat processing section 4 and the laminating section 5. The laminating unit 5 in FIG. 1 includes a pair of nip rolls 5a and 5b, and the nip roll 5b includes a heating device (not shown) therein for adjusting the temperature of the coating layer.

[0016] The operation of the sheet processing apparatus 10A in this embodiment will be described. First, the first sheet S1 is continuously unwound from the first web R1 by the first unwinding section 1 and sent to the coating section 3. The coating section 3 applies a thermosetting resin composition T to the first sheet S1 to form a coating layer, and the sheet is then sent to the heating section 4. The first sheet S1 with the coating layer formed thereon is heated by the heating section 4. Meanwhile, the second sheet S2 is continuously unwound from the second web R2 by the second unwinding section 2 and sent to the laminating section 5. In the laminating section 5, the first sheet S1 and the second sheet S2 after the heating process are bonded together via the coating layer to obtain the composite sheet S3. The composite sheet S3 is then wound up in a warm state by the winding section 6 and then transferred to an aging room (not shown) where an aging process is performed.

[0017] FIG. 2(a) is a schematic diagram of an example of a conventional sheet processing apparatus. FIG. 2(b) shows the thermal history of a sheet when using the sheet processing apparatus shown in FIG. 2(a). The sheet processing apparatus 50 shown in FIG. 2(a) includes a first unwinding section 51 that unwinds a first sheet S1 from a first web R1, a second unwinding section 52 that unwinds a second sheet S2 from a second web R2, a coating section 53 that applies a thermosetting resin composition T to the first sheet S1 to form a coating layer, a heating section 54 that heat-treats the first sheet S1 with the coating layer formed thereon, a laminating section 55 that bonds the heat-treated first sheet S1 and the second sheet S2 via the coating layer to obtain a composite sheet S3, and a winding section 56 that winds up the composite sheet. The laminating section 55 includes a pair of nip rolls 55a and 55b. The nip roll 55b includes a heating device (not shown) that adjusts the temperature of the coating layer. As shown in Figure 2(b), the temperature of the first sheet drops after passing through the exit of the heating unit 54 (P1). It is heated again in the laminating unit (P2), but the temperature of the composite sheet drops after passing through the laminating unit, and also drops between the time of winding (P3) and the start of aging (P4). Such large temperature changes make the sheet prone to wrinkling. The aging process also takes longer.

[0018] In contrast, as shown in Fig. 1, in the sheet processing apparatus 10A of this embodiment, at least the winding section 6 and the composite sheet S3 wound around the winding section 6 are covered with a heat-retaining member X. Fig. 3 shows the thermal history of a sheet when using the sheet processing apparatus shown in Fig. 1. As shown in Fig. 3, after passing through the exit of the heating processing section 4 (P1), the temperature drop of the first sheet is suppressed by the heat-retaining effect of the heat-retaining member X. Thereafter, the composite sheet is heated again in the laminating section (P2), and after passing through the laminating section, the temperature drop is suppressed during the time of winding (P3) and until the start of aging (P4).

[0019] Therefore, according to the sheet processing apparatus of this embodiment, it is possible to reduce the temperature change of the sheet (first sheet or composite sheet) after the heat treatment, and to suppress the occurrence of wrinkles. Furthermore, since the composite sheet can be wound up in a warm state while suppressing a temperature drop, it is possible to shorten the time required for the aging treatment, and energy loss is reduced, which is preferable from the viewpoint of energy conservation.

[0020] The configurations and characteristics of the sheet processing apparatus according to this embodiment will be described in detail below.

[0021] 1. First and second unwinding sections The first unwinding section supports a first web around which the first sheet is wound and unwinds the first sheet from the first web. The first unwinding section may be equipped with, for example, a motor that rotates the first unwinding section. In this case, the first sheet is unwound from the first web attached to the first unwinding section by rotating the first unwinding section.

[0022] The second unwinding section supports a second web around which the second sheet is wound and unwinds the second sheet from the second web. The second unwinding section may be equipped with, for example, a motor that rotates the second unwinding section. In this case, the second sheet is unwound from the second web attached to the second unwinding section by rotating the second unwinding section.

[0023] The first sheet and the second sheet are not particularly limited as long as they are long sheets, and examples thereof include resin films such as PET film and OPP film.

[0024] 2. Coating processing section The coating unit applies the thermosetting resin composition to the first sheet to form a coating layer. The coating method used by the coating unit is not particularly limited as long as it is a method for forming a coating layer on the surface of a continuously transported long sheet, and examples of the coating method include gravure printing, offset printing, flexographic printing, roll coating, inkjet printing, spraying, curtain coating, and dipping.

[0025] The configuration of the coating unit differs depending on the coating method. For example, when gravure printing is used, the coating unit 3 includes a guar gum roll 31, a backup roll 32, and a doctor blade 33, as shown in FIG.

[0026] A thermosetting resin composition is a composition containing at least a thermosetting resin and is a composition that cures when heated. Examples of thermosetting resins include urethane-based resins, phenol-based resins, urea-melamine-based resins, epoxy-based resins, unsaturated polyester-based resins, and silicone-based resins. The thermosetting resin composition may further contain a curing agent such as an isocyanate-based curing agent or an epoxy-based curing agent. The thermosetting resin composition may or may not contain a solvent. The thermosetting resin composition may be a one-component curing type or a two-component curing type.

[0027] The use of the thermosetting resin composition in this embodiment is not particularly limited, but may be used as an adhesive.

[0028] The thermosetting resin composition is supplied to the coating processing section by, for example, a supply device. The supply device includes, for example, a pump, a tank, and an ink pan. When a two-component curing type thermosetting resin composition is used, the supply device mixes the base material, the curing agent, and the solvent, and supplies the thermosetting resin composition to the coating processing section.

[0029] 3. Heat treatment section The sheet processing apparatus in this embodiment has a heating unit that heats the first sheet on which a coating layer has been formed. When the thermosetting resin composition contains a solvent, the coating layer can be dried by heating in the heating unit. When the thermosetting resin composition does not contain a solvent, the viscosity of the coating layer is reduced by heating in the heating unit, resulting in a leveling effect.

[0030] The heat treatment section may include, for example, a hot air device that blows hot air onto the first sheet. The hot air device can heat the first sheet uniformly. The heat treatment section may also include a temperature adjustment device that adjusts the temperature of the hot air.

[0031] 4.Lamination processing section The sheet processing apparatus of this embodiment has a laminating unit that bonds the heated first and second sheets together via the coating layer to obtain a composite sheet. As shown in FIG. 1 , the laminating unit 5 includes, for example, a pair of nip rolls 5a and 5b. The nip rolls 5a and 5b are rotating bodies that press the first sheet S1 and the second sheet S2 together between them to position and bond the surfaces of the coating layers to the second sheet. The nip rolls 5a and 5b also feed the composite sheet S3 obtained by bonding the first sheet S1 and the second sheet S2 downstream. At least one of the nip rolls 5a and 5b may include a heating device (not shown) built in to adjust the temperature of the thermosetting resin composition.

[0032] 5. Heat insulation materials In this embodiment, the heat-insulating member is arranged to cover at least the winding section and the composite sheet wound around the winding section. In this embodiment, the heat-insulating member refers to a member that, when comparing a case where a heat-insulating member is arranged and a case where a heat-insulating member is not arranged, causes less temperature drop of the composite sheet wound around the winding section when a heat-insulating member is arranged than when a heat-insulating member is not arranged.

[0033] The structure of the heat-retaining member is not particularly limited as long as it can cover at least the winding section and the composite sheet wound on the winding section. The heat-retaining member X shown in FIG. 1 has a first surface Xa facing the first surface S3a of the composite sheet S3 being conveyed, a second surface Xb facing the second surface S3b of the composite sheet S3, and four third surfaces Xc extending perpendicular to the first surface Xa. The upstream third surface Xc has an opening through which the composite sheet passes. The first surface S3a of the composite sheet S3 refers to the surface of the composite sheet S3 on the second sheet S2 side, when the first sheet S1 is used as a reference. The second surface S3b of the composite sheet S3 refers to the surface opposite the first surface S3a of the composite sheet S3.

[0034] The heat-insulating member X in this embodiment may have any one or more of the first surface Xa, the second surface Xb, and the four third surfaces Xc. It is preferable that the heat-insulating member X have any one or more of the first surface Xa and the second surface Xb, and it is particularly preferable that the heat-insulating member X have any one or more of the first surface Xa and the second surface Xb and any one or more of the four third surfaces Xc. For example, as shown in FIG. 6(a), the heat-insulating member X may have the first surface Xa and the second surface Xb. Alternatively, as shown in FIG. 6(b), the heat-insulating member X may have the first surface Xa and the four third surfaces Xc.

[0035] The size of the heat-retaining member is not particularly limited as long as it is large enough to cover at least the winding section and the composite sheet wound around the winding section. As shown in Figure 1, the upstream end Xs of the heat-retaining member X in the sheet conveyance direction is preferably located between the heat-treating section 4 and the winding section 6, more preferably between the heat-treating section 4 and the laminating section 5, and preferably immediately after the heat-treating section 4. Having the upstream end of the heat-retaining member immediately after the heat-treating section allows the sheet to maintain its temperature while being conveyed along the conveyance path from immediately after the heat-treating section to the winding section. This further suppresses the occurrence of wrinkles due to temperature changes and promotes smoothing of unevenness in the coating layer. "The upstream end of the heat-retaining member is located immediately after the heat-treating section" means that, as shown in Figure 1, the distance between the exit 4g of the heat-treating section 4 and the center 5c of the laminating section 5 in the sheet conveyance direction is L0, and the distance between the exit 4g of the heat-treating section 4 and the upstream end Xs of the heat-retaining member X is L1, and the ratio of these distances (L1 / L0) is 1 / 3 or less. The downstream end Xe of the heat-insulating member X is not particularly limited as long as it is located at a position that allows the heat-insulating member to cover the winding section and the composite sheet wound around the winding section.

[0036] 7, the heat-retaining member X may be arranged to cover all of the first unwinding section 1, the second unwinding section 2, the coating section 3, the heating section 4, the laminating section 5, the winding section 6, the first sheet S1, the second sheet S2, the composite sheet S3, the first web R1, the second web R2, and the composite sheet wound around the winding section 6. Furthermore, when the sheet processing apparatus 10A includes a heater 7 and a heating roller 8, which will be described later, the heat-retaining member X may be arranged to cover the heater 7 and the heating roller 8 in addition to the above.

[0037] In this case, it is preferable that the heat-retaining member X has a first surface Xa, a second surface Xb, and four third surfaces Xc, as shown in Fig. 7. On the other hand, the heat-retaining member X may have one or more of the first surface Xa and the second surface Xb, or may have one or more of the first surface Xa and the second surface Xb and one or more of the four third surfaces Xc.

[0038] Furthermore, if the sheet processing apparatus of this embodiment includes electronic devices such as a sensor for inspecting sheet quality or a programmable logic controller (PLC), covering the electronic devices with a heat-insulating member may result in breakdown due to high temperatures. Therefore, it is preferable that the electronic devices are not covered with the heat-insulating member. In this case, as shown in FIG. 8, it is preferable to provide a second heat-insulating member Z in addition to the heat-insulating member X (also referred to as the first heat-insulating member), and to arrange electronic devices such as a sensor 7 between the first heat-insulating member X and the second heat-insulating member Z in the conveying direction. In this case, the positions of the upstream end Xs of the first heat-insulating member X and the second heat-insulating member Z can be appropriately changed depending on the positions of the electronic devices. The second heat-insulating member Z may cover the laminating unit as shown in FIG. 8, or may cover other processing units.

[0039] The heat-retaining member may be at least one of a heat insulating material and a heat shielding material. The heat insulating material may be any material that exhibits the desired heat insulating properties, such as foamed plastic heat insulating material, vacuum heat insulating material, glass wool, etc. The heat shielding material may be aluminum foil, etc.

[0040] 6. Winding section In this embodiment, the winding unit rotates the winding core to wind the composite sheet into a roll. The winding unit is attached to, for example, a motor that rotates the winding unit. In this embodiment, the winding unit and the composite sheet wound around the winding unit are covered with a heat-retaining member, so the composite sheet can be wound while being kept warm, for example, at room temperature (22°C or higher).

[0041] As shown in FIG. 4, the composite sheet may be wound up while being heated by a heating roll 8, which is a roll-shaped heating element (heating body). The heating roll 8 has a heater and a pipe passage through which a fluid such as hot water or heated oil passes. The heating roll 8 comes into contact with the moving composite sheet as it rotates, thereby heating the composite sheet. The temperature of the heating roll 8 may be adjusted by a temperature adjustment device (not shown). The temperature adjustment device adjusts the temperature of the water or oil, or the temperature of an electric heater, to adjust the temperature of the heating roll 8. The temperature adjustment device is connected to the heating roll 8 via a pipe passage or electrically.

[0042] 7. Other materials As shown in Fig. 4, the sheet processing apparatus 10A may have a heater 7 inside the heat-retaining member X to increase the temperature inside the heat-retaining member X or to heat the composite sheet S3. The heater 7 is preferably provided between the winding unit 6 and the laminating unit 5. By providing such a heater inside the heat-retaining member, a decrease in the temperature of the sheet is further suppressed. In addition, the viscosity of the coating layer is reduced, facilitating leveling.

[0043] The sheet processing device in this embodiment may have a third unwinding unit that unwinds a third sheet other than the first sheet and the second sheet. In this case, the sheet processing device may have a laminating unit that directly or indirectly bonds the third sheet unwound from the third unwinding unit to the first sheet, the second sheet, or the composite sheet. The number of third unwinding units in the sheet processing device may be one or more.

[0044] The sheet processing apparatus in this embodiment may have a guide roll for guiding the conveyed sheet. The number of guide rolls in the sheet processing apparatus may be one or more.

[0045] 8. Aging treatment The composite sheet wound into a roll at the winding section is transferred in the wound state to a constant temperature facility (aging room) where the next aging treatment is performed. To promote the curing of the thermosetting resin composition, the aging treatment is performed, for example, at a temperature of 35°C to 100°C for about one to seven days.

[0046] B. Second embodiment FIG. 5 is a schematic cross-sectional view showing an example of a sheet processing apparatus according to this embodiment. The sheet processing apparatus 10B according to this embodiment is a sheet processing apparatus that performs a coating process and a heat process on a sheet. The sheet processing apparatus 10B includes an unwinding section 11 that unwinds the sheet S4 from a raw roll R3 around which the sheet S4 is wound, a coating processing section 13 that applies a thermosetting resin composition T to the sheet S4 to form a coating layer, a heat processing section 14 that heat-treats the sheet S4 on which the coating layer has been formed, a winding section 16 that winds up the heat-treated sheet S4, and a heat-insulating member Y that is disposed to cover at least the winding section 16 and the sheet S4 wound up around the winding section 16. In FIG. 5, the upstream end Ys of the heat-insulating member Y is located immediately after the heat processing section 14.

[0047] The operation of the sheet processing apparatus 10B in this embodiment will be described. First, the sheet S4 is continuously unwound from the raw roll R3 by the unwinding section 11 and sent to the coating section 13. The coating section 13 applies a thermosetting resin composition T to the sheet S4 to form a coating layer, and the sheet S4 is sent to the heating section 14. The sheet S4 with the coating layer formed thereon is heated by the heating section 14. After the heating process, the sheet S4 is wound up in a warm state by the winding section 16 and then transferred to an aging room (not shown).

[0048] In the sheet processing apparatus 10B of this embodiment, at least the winding section 16 and the sheet S4 wound around the winding section 16 are covered with a heat-retaining member Y. The sheet processing apparatus of this embodiment can reduce the temperature change of the sheet after heat treatment, thereby suppressing the occurrence of wrinkles. Furthermore, since the sheet on which the coating layer is formed can be wound up in a warm state while suppressing a drop in temperature, the time required for the aging treatment can be shortened, reducing energy loss and being preferable from the viewpoint of energy conservation.

[0049] The configurations and characteristics of the sheet processing apparatus according to this embodiment will be described in detail below.

[0050] 1. Unwinding section The unwinding section 11 in this embodiment supports the raw roll R3 around which the sheet S4 is wound, and unwinds the sheet S4 from the raw roll R3. The unwinding section and the sheet in this embodiment are similar to the first unwinding section and the first sheet in the first embodiment, respectively.

[0051] 2. Coating processing section The sheet processing apparatus of this embodiment has a coating processing unit that applies a thermosetting resin composition to a sheet to form a coating layer. The coating method and configuration of the coating processing unit, and the thermosetting resin composition are the same as those in the first embodiment.

[0052] The use of the thermosetting resin composition in this embodiment is not particularly limited, but may be used as a protective layer.

[0053] 3. Heat treatment section The sheet processing apparatus of this embodiment has a heating unit that heats the sheet on which the coating layer is formed, which is the same as the heating unit of the first embodiment.

[0054] 4. Heat insulation materials In this embodiment, the heat-insulating member is arranged to cover at least the winding section and the sheet wound around the winding section. In this embodiment, the heat-insulating member refers to a member that, when comparing a case where a heat-insulating member is arranged and a case where a heat-insulating member is not arranged, causes less temperature drop in the sheet wound around the winding section than when a heat-insulating member is not arranged.

[0055] The structure of the heat-retaining member in this embodiment is not particularly limited as long as it is capable of covering at least the winding section and the sheet wound on the winding section. The heat-retaining member Y shown in Fig. 5 has a first surface Ya facing the first surface S4a of the sheet S4 being conveyed, a second surface Yb ​​facing the second surface S4b of the sheet S4, and four third surfaces Yc extending perpendicular to the first surface Ya. The upstream third surface Yc has an opening through which the sheet on which the coating layer is formed passes. The first surface S4a of the sheet S4 refers to the surface of the sheet S4 on the side on which the coating layer is formed. The second surface S4b of the sheet S4 refers to the surface opposite the first surface S4a of the sheet S4.

[0056] The heat-retaining member Y in this embodiment may have at least one of the first surface Ya, the second surface Yb, and the four third surfaces Yc. In particular, it is preferable that the heat-retaining member Y has at least one of the first surface Ya and the second surface Yb, and it is particularly preferable that the heat-retaining member Y has at least one of the first surface Ya and the second surface Yb ​​and at least one of the four third surfaces Yc.

[0057] The size of the heat-retaining member in this embodiment is not particularly limited as long as it is large enough to cover at least the winding section and the sheet wound on the winding section. In this embodiment, the upstream end of the heat-retaining member is preferably located between the heat-treating section and the winding section in the sheet conveying direction, and more preferably located immediately after the heat-retaining section. In this embodiment, "the upstream end of the heat-retaining member is located immediately after the heat-retaining section" refers to the distance L between the outlet 14g of the heat-retaining section 14 and the upstream end Ys of the heat-retaining member Y, as shown in FIG. 11 The distance L is 200cm or less.11 The downstream end Ye of the heat-insulating member Y is not particularly limited as long as it is located at a position where the heat-insulating member can cover the winding section and the sheet wound around the winding section.

[0058] On the other hand, the heat-retaining member Y may be arranged to cover all of the unwinding section 11, the coating section 13, the heating section 14, the winding section 16, the sheet S4, the raw web R3, and the sheet wound around the winding section 16. Furthermore, when the sheet processing apparatus 10B includes a heater 17 and a heating roller 18 (described later), the heat-retaining member Y may also be arranged to cover the heater 17 and the heating roller 18. In this case, it is preferable that the heat-retaining member Y has a first surface Ya, a second surface Yb, and four third surfaces Yc. Alternatively, the heat-retaining member Y may have one or more of the first surface Ya and the second surface Yb, or may have one or more of the first surface Ya and the second surface Yb ​​and one or more of the four third surfaces Yc.

[0059] Furthermore, when the sheet processing apparatus of this embodiment has electronic equipment, it is preferable that the electronic equipment is not covered by the heat-retaining member described above for the same reasons as in the first embodiment. In this case, it is preferable that a second heat-retaining member Z is provided in addition to the heat-retaining member Y (also referred to as the first heat-retaining member), and the electronic equipment is disposed between the first heat-retaining member Y and the second heat-retaining member Z in the conveying direction. In this case, the positions of the upstream end Ys of the first heat-retaining member Y and the second heat-retaining member Z are appropriately changed depending on the position of the electronic equipment.

[0060] The material of the heat insulating member is the same as that in the first embodiment.

[0061] 5. Winding section The winding unit in this embodiment rotates the winding core and winds the sheet on which the heat-treated coating layer has been formed into a roll. The winding unit is attached to, for example, a motor that rotates the winding unit. The winding unit in this embodiment is surrounded by a heat-retaining member, so the sheet can be wound while being kept warm, for example, at room temperature (22°C or higher). As shown in FIG. 5, the sheet on which the coating layer has been formed may be wound while being heated by a heating roll 18, which is a roll-shaped heating element (heater). The heating roll is the same as the heating roll in the first embodiment.

[0062] 6. Other materials 5, a heater 17 may be provided inside the heat-retaining member Y to increase the temperature inside the heat-retaining member Y or to heat the sheet on which the coating layer is formed. The heater is the same as the heater in the first embodiment.

[0063] The sheet processing apparatus in this embodiment may have a third unwinding section that unwinds a sheet (third sheet) other than the above-mentioned sheet (first sheet). In this case, the sheet processing apparatus may have a laminating section that directly or indirectly bonds the third sheet unwound from the third unwinding section to the first sheet or the first sheet on which a coating layer has been formed. The number of third unwinding sections in the sheet processing apparatus may be one or more.

[0064] The sheet processing apparatus in this embodiment may have a guide roll for guiding the conveyed sheet. The number of guide rolls in the sheet processing apparatus may be one or more.

[0065] 7. Aging treatment The sheet wound into a roll in the winding section is transferred in the wound state to a constant temperature facility (aging room) where the next aging process is performed. The aging process temperature and time are the same as those in the first embodiment.

[0066] The present disclosure is not limited to the above-described embodiments. The above-described embodiments are merely examples, and any embodiment that has substantially the same configuration as the technical idea described in the claims of the present disclosure and exhibits similar effects is included within the technical scope of the present disclosure.

[0067] Thus, the present disclosure provides, for example, the following inventions.

[0068] [1] a first unwinding section that unwinds the first sheet from a first web around which the first sheet is wound; a second unwinding section that unwinds the second sheet from a second web around which the second sheet is wound; a coating processing unit that applies a thermosetting resin composition to the first sheet to form a coating layer; a heat treatment unit that heat-treats the first sheet on which the coating layer is formed; a lamination processing unit that bonds the first sheet and the second sheet after the heat treatment via the coating layer to obtain a composite sheet; a winding unit that winds up the composite sheet; a heat-retaining member disposed to cover at least the winding section and the composite sheet wound around the winding section.

[0069] [2] an unwinding unit that unwinds the sheet from a roll around which the sheet is wound; a coating processing unit that applies a thermosetting resin composition to the sheet to form a coating layer; a heat treatment unit that heat-treats the sheet on which the coating layer is formed; a winding section that winds up the sheet after the heat treatment; a heat-retaining member disposed to cover at least the winding section and the sheet wound around the winding section.

[0070] [3] The sheet processing apparatus according to [1] or [2], wherein an upstream end of the heat-retaining member is present between the heating processing unit and the winding unit.

[0071] [4] The sheet processing apparatus according to [1], wherein an upstream end of the heat-retaining member is located between the heating processing section and the laminating processing section.

[0072] [5] The sheet processing apparatus according to any one of [1] to [4], wherein the upstream end of the heat-retaining member is located immediately after the heating processing unit. [Explanation of symbols]

[0073] 1,11...First unwinding section (unwinding section) 2...Volume 2 3, 13... Coating processing section 4, 14...heat treatment section 5,15...Lamination processing section 6,16...winding section 7,17...Heater 8,18...Heated roll 10A, 10B...Sheet processing device X, Y... Heat insulation material S1~S4...Sheets

Claims

1. a first unwinding section that unwinds the first sheet from a first web around which the first sheet is wound; a second unwinding section that unwinds the second sheet from a second web around which the second sheet is wound; a coating processing unit that applies a thermosetting resin composition to the first sheet to form a coating layer; a heat treatment unit that heat-treats the first sheet on which the coating layer is formed; a lamination processing unit that bonds the first sheet and the second sheet after the heat treatment with the coating layer interposed therebetween to obtain a composite sheet; a winding unit that winds up the composite sheet; a heat-retaining member disposed to cover at least the winding section and the composite sheet wound around the winding section.

2. an unwinding unit that unwinds the sheet from a roll around which the sheet is wound; a coating processing unit that applies a thermosetting resin composition to the sheet to form a coating layer; a heat treatment unit that heat-treats the sheet on which the coating layer is formed; a winding section that winds up the sheet after the heat treatment; a heat-retaining member disposed to cover at least the winding section and the sheet wound around the winding section.

3. The sheet processing apparatus according to claim 1 , wherein an upstream end of the heat-retaining member is located between the heating processing section and the winding section.

4. The sheet processing apparatus according to claim 1 , wherein an upstream end of the heat-retaining member is located between the heating processing section and the laminating processing section.

5. The sheet processing apparatus according to claim 1 , wherein an upstream end of the heat retaining member is located immediately after the heating processing section.

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