panel

Abstract

To provide a manufacturing method of a panel which is excellent in adhesive strength and light-weight property and can be efficiently manufactured.SOLUTION: A manufacturing method of a panel includes a first adhesion process and a second adhesion process. In the first adhesion process, face material is adhered onto base material to form an adhesion body. In the second adhesion process, skin material is adhered onto the adhesion body to form the panel. The first adhesion process includes a first coating process and a first sticking process. In the first coating process, a first adhesive agent is applied onto the face material by a roll coater. In the first sticking process, a coating face of the first adhesive agent of the face material is stuck onto the base material to form an adhesion body. The second adhesion process includes a second coating process and a second sticking process. In the second coating process, a second adhesive agent is applied onto the skin material by a spray coater. In the second sticking process, the coating face of the first adhesive agent is applied to the skin material. In the second sticking process, the skin material is stuck so as to cover at least one part of first principal plane and lateral plane of the adhesion body, and at least one part of second principal plane of the adhesion body.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a panel that can be used as a luggage board or the like to be installed in the trunk of a vehicle. [Background technology]

[0002] Patent Document 1 discloses a panel configured by attaching a thin steel plate to a hollow plate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-7900 A Summary of the Invention [Problem to be solved by the invention]

[0004] Panels such as those described in Patent Document 1 are required to be even lighter, and in order to achieve this, it is necessary to reduce the amount of adhesive used as much as possible. However, reducing the amount of adhesive used can result in insufficient adhesive strength or greater variation in adhesive strength, so it is not easy to maintain adhesive strength while reducing the amount of adhesive used to reduce weight.

[0005] The present invention has been made in view of the above circumstances, and provides a method for manufacturing a panel that is excellent in adhesive strength and lightweight, and that can be manufactured efficiently. [Means for solving the problem]

[0006] According to the present invention, there is provided a method for manufacturing a panel comprising a first bonding step and a second bonding step, wherein in the first bonding step, a face material is bonded to a base material to form an adhesive body, and in the second bonding step, a skin material is bonded to the adhesive body to form a panel, the first bonding step comprising a first application step and a first sticking step, in which the first application step applies a first adhesive to the face material with a roll coater, and in the first sticking step, the surface of the face material to which the first adhesive has been applied is stuck to the base material to form the adhesive body, the second bonding step comprising a second application step and a second sticking step, in which the second application step applies the second adhesive to the skin material with a spray coater, and in the second sticking step, the surface of the skin material to which the first adhesive has been applied is stuck to the adhesive body, and in the second sticking step, the skin material is stuck so as to cover at least a part of the first main surface and side surfaces of the adhesive body and at least a part of the second main surface of the adhesive body.

[0007] As will be shown in the examples and comparative examples described below, the method of the present invention can increase the adhesive strength between the substrate and the face material while minimizing the amount of adhesive used, and can also increase the edge adhesive strength of the skin material while improving manufacturing efficiency.

[0008] Various embodiments of the present invention will be described below as examples, and the embodiments shown below can be combined with each other. Preferably, the method described above further comprises a heating step between the first application step and the first attachment step, in which the first adhesive applied to the face material is heated. Preferably, the method is as described above, wherein the first adhesive is a moisture-curable polyurethane-based hot melt adhesive. Preferably, the method is as described above, wherein the second adhesive is a moisture-curable polyolefin-based hot melt adhesive. [Brief explanation of the drawings]

[0009] [Figure 1]FIG. 1A is a cross-sectional view of a panel 1 according to one embodiment of the present invention, FIG. 1B is an enlarged view of region B in FIG. 1A, and FIG. 1C is FIG. 1B with the skin material 4 and adhesive layer 7 removed. [Figure 2] FIG. 1C is an exploded view of FIG. 1B (adhesive layers 6 and 7 are not shown). [Figure 3] 10 is an explanatory diagram of a first application step in which a first adhesive 6a is applied to a face material 3 by a roll coater 9. FIG. [Figure 4] 10 is an explanatory diagram of a second application step in which a second adhesive 7a is applied to the skin material 4 by a spray coater 10. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] The following describes embodiments of the present invention. The various features shown in the following embodiments can be combined with each other. Furthermore, each feature can be an invention independently.

[0011] 1. Panel 1 Structure A panel 1 according to one embodiment of the present invention will now be described. As shown in Figs. 1 and 2, the panel 1 comprises a base material 2, a face material 3, and a skin material 4. The panel 1 preferably has a substantially rectangular parallelepiped shape. The panel 1 can be used as a luggage board or the like to be installed in the trunk of a vehicle.

[0012] The length of the panel 1 in the first direction is L1, and the length in the second direction perpendicular to the first direction is L2, where L1 ≥ L2. L1 is, for example, 600 to 1200 mm, specifically, for example, 600, 700, 800, 900, 1000, 1100, or 1200 mm, or may be within a range between any two of the values ​​exemplified herein. L1 is, for example, 300 to 1200 mm, specifically, for example, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, or 1200 mm, or may be within a range between any two of the values ​​exemplified herein. The value of L2 / L1 is, for example, 0.3 to 1, specifically, for example, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1.0, or may be within a range between any two of the values ​​exemplified herein.

[0013] The substrate 2 is preferably a plate-shaped member. The thickness of the substrate 2 is 10 to 25 mm, preferably 18 to 22 mm. If the substrate 2 is too thin, the overall deflection of the panel 1 will be too large. On the other hand, if the substrate 2 is too thick, the weight of the panel 1 will be too large. Specific examples of the thickness are 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, and 25 mm, and may be within a range between any two of the values ​​exemplified here. The thickness of the substrate 2 refers to the distance at the portion where the distance between the opposing first and second main surfaces 2a and 2b of the substrate 2 is greatest. The substrate 2 is preferably provided with a recess 5, and the face material 3 is fixed within the recess 5. This prevents the face material 3 from peeling off from the substrate 2.

[0014] The substrate 2 may be a foamed or non-foamed body. The substrate 2 may also be a hollow or solid body. The substrate 2 is preferably formed by molding using a mold. In this case, the substrate 2 can be formed into a desired shape before manufacturing the panel 1, which provides excellent handleability. Furthermore, the substrate 2 can be shaped to match the desired panel shape, which allows for a product with an optimized shape to be obtained.

[0015] Examples of the substrate 2 include a bead foam molded body obtained by bead expansion molding, a foamed or non-foamed sheet molded body obtained by imparting a textured shape to a single foamed or non-foamed resin sheet, and a foamed or non-foamed hollow molded body obtained by molding a foamed or non-foamed cylindrical parison or two resin sheets.

[0016] The bead expansion molding can be made of, for example, expanded polystyrene, expanded acrylonitrile styrene, expanded polypropylene, etc., and its expansion ratio is, for example, 15 to 50 times, specifically, for example, 15, 20, 25, 30, 35, 40, 45, or 50 times, or may be within a range between any two of the numerical values ​​exemplified here.

[0017] The foamed parison or foamed resin sheet can be made of a polyolefin such as polyethylene or polypropylene, and the foaming ratio of a molded article using this is, for example, 1.1 to 8 times, specifically, for example, 1.1, 1.5, 2, 3, 4, 5, 6, 7, or 8, and may be within a range between any two of the numerical values ​​exemplified here.

[0018] The face material 3 is a plate-like member and is adhered to the base material 2 via an adhesive layer 6. The face material 3 is adhered to one or both of the first and second main surfaces 2a, 2b of the base material 2. The main surfaces 2a, 2b are, in other words, the front and back surfaces of the base material 2. The main surfaces 2a, 2b are connected by a side surface 2c. From the viewpoint of increasing the rigidity of the panel 1, it is preferable that the face material 3 be adhered to both the main surfaces 2a, 2b, but from the viewpoint of weight reduction, it is preferable that the face material 3 be adhered only to the main surface 2a or only to the main surface 2b.

[0019] The face material 3 can be made of a material with higher rigidity per unit thickness than the base material 2, such as metal (aluminum, iron, etc.) or fiber-reinforced resin. The thickness of each face material 3 is, for example, 0.05 to 1 mm, preferably 0.08 to 0.5 mm. Specific examples include 0.05, 0.08, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.60, 0.70, 0.80, 0.90, and 1.00 mm, and may be within a range between any two of the values ​​exemplified here. In this specification, values ​​such as thickness and depth refer to average values ​​unless otherwise specified.

[0020] The covering material 4 is adhered to an adhesive body 8 formed by adhering a face material 3 to a substrate 2. The covering material 4 is, for example, a nonwoven fabric, and can be adhered to the adhesive body 8 via an adhesive layer 7. The first and second main surfaces 8a, 8b of the adhesive body 8 correspond to the first and second main surfaces 2a, 2b of the substrate 2, and the main surfaces 8a, 8b face each other. The side surface 8c of the adhesive body 8 coincides with the side surface 2c of the substrate 2.

[0021] More specifically, the skin material 4 is adhered so as to cover at least a portion of the main surface 8a and the side surface 8c, and at least a portion of the main surface 8b. As shown in FIG. 1B, the skin material 4 preferably includes first and second skin materials 4a and 4b. Each of the skin materials 4a and 4b is a single sheet of skin material. The skin material 4a preferably covers at least a portion (preferably the entirety) of the main surface 8a and the side surface 8c, and a portion of the main surface 8b (preferably the peripheral portion of the main surface 8b). The skin material 4a preferably covers the boundary between the face material 3 on the main surface 8b side and the substrate 2. In this case, peeling of the face material 3 on the main surface 8b side is suppressed. The skin material 4b covers the remainder of the main surface 8b. The peripheral portions of the skin material 4a and the skin material 4b preferably overlap each other. In this case, gaps between the skin materials 4a and 4b are avoided. The skin 4b may be omitted and the skin 4 may be formed only by the skin 4a.

[0022] 2. Manufacturing method of Panel 1 The method for manufacturing the panel 1 according to one embodiment of the present invention comprises a first bonding step and a second bonding step. Each step will be described in detail below.

[0023] (1) First adhesion process In the first bonding step, the face material 3 is bonded to the substrate 2 to form the bonded body 8. The first bonding step includes a first application step and a first attachment step.

[0024] (1-1) First coating process As shown in FIG. 3, in the first application step, a first adhesive 6a is applied to the facing material 3 by a roll coater 9.

[0025] The roll coater 9 is a coating device that uses a coating roll 9a, and the adhesive coated on the surface of the coating roll 9a is brought into contact with the object to be coated, thereby coating the adhesive onto the object.

[0026] In one example, the roll coater 9 includes a coating roll 9a, a doctor roll 9b, and a backup roll 9c. The coating roll 9a and the doctor roll 9b are positioned with a gap 9d between them. The coating roll 9a and the backup roll 9c are positioned with a gap 9e between them. The face material 3 is conveyed by the coating roll 9a and the backup roll 9c rotating in opposite directions while sandwiched between them. Furthermore, as the coating roll 9a and the doctor roll 9b rotate in opposite directions, the first adhesive 6a supplied to the upper side of the gap 9d passes through the gap 9d and becomes a thin film 6b of the first adhesive 6a on the coating roll 9a. As the coating roll 9a continues to rotate, the thin film 6b comes into contact with the face material 3, and the thin film 6b is transferred to the face material 3 and becomes a coating film 6c of the first adhesive 6a. The thickness of the coating film 6c can be adjusted by changing the size of the gap 9d.

[0027] To reduce the weight of the panel 1, it is necessary to minimize the amount of first adhesive 6a used, but under such constraints, the spray coater reduces the uniformity of application of the first adhesive 6a, resulting in greater in-plane variation in adhesive strength and making the face material 3 more susceptible to peeling in areas with weak adhesive strength. On the other hand, the roll coater has the advantage of easily increasing application uniformity even when the amount of first adhesive 6a used is reduced.

[0028] Furthermore, the substrate 2 may have an uneven surface, and applying an adhesive to such a surface using a roll coater will result in variations in the thickness of the applied first adhesive 6a, resulting in greater in-plane variations in adhesive strength and making the face material 3 more susceptible to peeling in areas where the adhesive strength is weak. On the other hand, the unevenness of the surface of the face material 3 is smaller than that of the substrate 2, so by applying the first adhesive 6a to the face material 3, it is possible to reduce variations in the thickness of the applied first adhesive 6a compared to applying the first adhesive 6a to the substrate 2. Note that when the substrate 2 is a bead foam molded body, the unevenness of the surface of the substrate 2 is particularly pronounced, and therefore applying the first adhesive 6a to the face material 3 when the substrate 2 is a bead foam molded body is of particular technical significance.

[0029] Examples of the first adhesive 6a include polyurethane adhesives and polyolefin adhesives. The first adhesive 6a is preferably moisture-curable and can be melted by heating (a hot-melt adhesive). In this case, the face material 3 is temporarily bonded to the base material 2 while the adhesive is heated, and then the adhesive can be permanently bonded by moisture curing. After the permanent bonding, the adhesive does not melt even when heated, improving the high-temperature resistance of the panel 1. For the above reasons, the first adhesive 6a is particularly preferably a moisture-curable hot-melt adhesive, and even more preferably a moisture-curable polyurethane-based hot-melt adhesive. This is because moisture-curable polyurethane-based hot-melt adhesives are highly suitable for roll coating. The amount of the first adhesive 6a used is, for example, 10 to 100 g / m 2 Specifically, for example, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 g / m 2 and may be in a range between any two of the values ​​given here.

[0030] (1-2) First attachment process In the first attachment step, the surface of the face material 3 on which the first adhesive 6a is applied is attached to the substrate 2 to form the bonded body 8 shown in FIG. 1C. This step can be performed by pressing the face material 3 against the substrate 2 with the surface of the face material 3 on which the first adhesive 6a is applied facing the substrate 2. An adhesive layer 6 is formed by the first adhesive 6a. When the face material 3 is attached to both sides of the substrate 2, the face materials 3 on both sides may be attached to the substrate 2 simultaneously, or may be attached one side at a time in sequence.

[0031] When manufacturing a panel 1 configured such that a surface material 3 is placed in a recess 5 of a base material 2, the surface material 3 may be placed in a recess 5 formed in advance in the base material 2, or the surface material 3 may be pressed against the base material 2 to cause the surface material 3 to sink into the base material 2 and form the recess 5.

[0032] It is preferable to provide a heating step between the first application step and the first attachment step. In the heating step, the first adhesive 6a applied to the face material 3 is heated. By providing this step, it is possible to suppress a decrease in adhesive strength that accompanies a decrease in the temperature of the first adhesive applied to the face material 3.

[0033] (2)Second adhesion process In the second bonding step, the skin material 4 is bonded to the adhesive body 8 to form the panel 1. The second bonding step includes a second application step and a second attachment step.

[0034] (2-1) Second coating process As shown in FIG. 4, in the second application step, a second adhesive 7a is applied to the skin material 4 by a spray coater 10.

[0035] The spray coater 10 is a coating device that uses a spray head 10a, and the adhesive is sprayed from the spray head 10a onto the object to be coated, thereby coating the object with the adhesive.

[0036] In one example, the spray coater 10 includes a spray head 10a and a drive unit 10b. The drive unit 10b is, for example, a robot arm 10b1. The spray head 10a is attached to the drive unit 10b and is driven by the drive unit 10b to apply a desired amount of adhesive to a desired area of ​​an object to be coated.

[0037] To reduce the weight of the panel 1, the amount of second adhesive 7a used must be minimized, and to prevent peeling of the skin 4, the adhesive strength of the peripheral edge of the skin 4 must be increased. With a roll coater, the amount of adhesive applied to the peripheral edge of the skin 4 cannot be greater than that to the central portion (areas other than the peripheral edge) of the skin 4. Therefore, under conditions where there is a limit to the amount of second adhesive 7a used, the amount of adhesive applied to the peripheral edge of the skin 4 may be insufficient, resulting in insufficient adhesive strength at the peripheral edge of the skin 4. On the other hand, with a spray coater, it is possible to apply any amount of adhesive to any location on the skin 4. Therefore, by reducing the amount of adhesive applied to the central portion of the skin 4, it is possible to increase the amount of adhesive applied to the peripheral edge of the skin 4 without changing the amount of adhesive used, thereby increasing the adhesive strength at the peripheral edge of the skin 4.

[0038] Although it is possible to apply the second adhesive 7a to the adhered body 8, applying the second adhesive 7a to both the main surface 8a and the side surface 8c of the adhered body 8 requires complicated movement of the spray head 10a. In addition, applying the second adhesive 7a to the main surface 8b of the adhered body 8 also requires turning the adhered body 8 upside down, which increases the time required for the second application step. For this reason, it is preferable to apply the second adhesive 7a to the skin material 4.

[0039] Examples of the second adhesive 7a include polyurethane adhesives and polyolefin adhesives. The second adhesive 7a is preferably a moisture-curing adhesive, and is preferably meltable by heating (a hot-melt adhesive). In this case, the skin material 4 is temporarily bonded to the adhesive body 8 while the adhesive is heated, and then the actual bonding can be achieved by moisture curing. After the actual bonding, the adhesive does not melt even when heated, improving the high-temperature resistance of the panel 1. For these reasons, it is particularly preferable that the second adhesive 7a be a moisture-curing hot-melt adhesive.

[0040] Furthermore, when the second adhesive 7a applied to the covering material 4 is attached to the adhesive body 8 without heating, a moisture-curing polyolefin-based hot melt adhesive tends to have higher adhesive strength than a moisture-curing polyurethane-based hot melt adhesive, so the second adhesive 7a is preferably a moisture-curing polyolefin-based hot melt adhesive. When the second adhesive 7a is a moisture-curing polyurethane-based hot melt adhesive, it is preferable to include a heating step of heating the second adhesive 7a applied to the covering material 4 between the second application step and the second attachment step.

[0041] The amount of the second adhesive 7a used is, for example, 10 to 100 g / m 2 Specifically, for example, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 g / m 2 and may be in a range between any two of the values ​​given here.

[0042] (2-2) Second attachment process In the second attachment step, the surface of the skin 4 to which the second adhesive 7a is applied is attached to the adhesive body 8. This step can be performed by pressing the skin 4 against the adhesive body 8 with the surface of the skin 4 to which the second adhesive 7a is applied facing the adhesive body 8. The adhesive layer 7 is formed by the second adhesive 7a. When the skin 4 includes skins 4a and 4b, the skin 4b can be attached after the skin 4a is attached. It is preferable to attach the skin 4b so that the peripheral edge of the skin 4b overlaps the peripheral edge of the skin 4a. [Example]

[0043] 1. Fabrication of Panel 1 According to the manufacturing method described in the above embodiment, panel 1 was manufactured under the conditions shown in Table 1. The roll coater used was a roll coater 9 (hot melt roll coater) shown in FIG. 3. The spray coater used was a spray coater 10 shown in FIG. 4. Details of the members used in the manufacturing are as follows. Substrate 2: Bead foam molding formed using Heat Pole GR (JSP Corporation, expandable polyacrylonitrile / styrene beads), expansion ratio 40 times, thickness 20 mm, 1000 mm x 450 mm Surface material 3: Aluminum (Al5052) surface material, thickness 0.3 mm, 990 mm x 440 mm Skin material 4a, 4b: Non-woven fabric (PET, skin material 4a: 300g / m 2 , skin material 4b: 100g / m 2 ) skin material, skin material 4a is 1120mm x 570mm, skin material 4b is 960mm x 410mm. Polyurethane adhesive: Moisture-curing polyurethane hot melt adhesive (Henkel TECHNOMELT PUR 3460) Polyolefin adhesive: Moisture-curing polyolefin hot melt adhesive (Moresco Melt RO-1280) Roll coater 9: Effective roll width 620 mm, coating roll diameter 140 mm, doctor roll diameter 80 mm, coating speed 7 m / min Spray coater 10: 216 nozzles with a nozzle diameter of 0.3 mm x 0.4 mm arranged in a straight line at 0.5 mm pitch

[0044] The amount of the first adhesive 6a used in the first bonding step is 60 g / m 2 The amount of the second adhesive 7a used in the second bonding step is 60 g / m 2 When the second adhesive 7a was applied by the spray coater 10 in the second bonding step, the amount of the second adhesive 7a applied in the region 30 mm from the periphery of the skin material 4 was three times that of the other region.

[0045] In the first bonding step, the first adhesive 6a was applied at 120°C. In the first and second bonding steps, the heating step was performed so that the adhesive temperature was 80°C. When heating was not performed in the first bonding step, the face material 3 was attached to the substrate 2 approximately 10 seconds after the application of the first adhesive 6a. When heating was performed in the first bonding step, the face material 3 was attached to the substrate 2 approximately 30 seconds after the application of the first adhesive 6a. When heating was not performed in the second bonding step, the skin material 4 was attached to the adherend 8 approximately 20 seconds after the application of the second adhesive 7a. When heating was performed in the second bonding step, the skin material 4 was attached to the adherend 8 approximately 40 seconds after the application of the second adhesive 7a.

[0046] In the second bonding step, after the skin material 4a was attached, the skin material 4b was attached so that the peripheral edges of the skin materials 4a and 4b overlapped by 10 mm.

[0047] [Table 1]

[0048] 2. Evaluation The evaluation was carried out by the following methods, and the results are shown in Table 1.

[0049] <Adhesive strength of surface material> At each of the nine points evenly arranged in a grid pattern on panel 1, a 25 mm x 150 mm test piece was cut out, the face material was peeled off about 20 mm from the edge of the test piece, and while the substrate was fixed, the peeled face material was chucked and peeled off at a tensile speed of 200 mm / min using a tensile testing machine, and the peel strength was measured when the face material 3 was peeled off from the substrate 2 in this manner, and the test piece with the lowest peel strength was evaluated according to the following criteria. ○: Peel strength is 10N or more. △: Peel strength is 5N or more and less than 10N. ×: Peel strength is less than 5N.

[0050] <Application speed of second adhesive> The coating time from the start to the end of coating of the second adhesive 7a was measured and evaluated according to the following criteria. ○: Coating time is 10 seconds or less. △: Coating time is more than 10 seconds and 30 seconds or less. ×: Coating time exceeds 30 seconds.

[0051] <Edge adhesive strength of skin material> Test pieces measuring 25 mm x 150 mm were cut out from panel 1 at 10 locations around the periphery of skin material 4a (two locations on each of the short sides and three locations on each of the long sides of panel 1), and the skin material was peeled off by approximately 20 mm from the edge of the test piece. With the adhesive still fixed, the peeled skin material was chucked and peeled off at a tensile speed of 200 mm / min using a tensile tester. The peel strength when skin material 4a was peeled off from adhesive 8 was measured, and the test piece with the lowest peel strength among the 10 test pieces was used to evaluate the test piece according to the following criteria. ○: Peel strength is 7N or more. △: Peel strength is 3N or more and less than 7N. ×: Peel strength is less than 3N. [Explanation of symbols]

[0052] 1: Panel 2: Base material 2a: 1st principal surface 2b: 2nd principal surface 2c: Side 3: Surface material 4:Skin material 4a: 1st skin material 4b:Second skin material 5: Recess 6: Adhesive layer 6a: First adhesive 6b: Thin film 6c: Coating film 7: Adhesive layer 7a: Second adhesive 8: Adhesive body 8a: First main surface 8b: Second main surface 8c: Side 9: Roll coater 9a: Coating roll 9b: Doctor Roll 9c: Backup role 9d: Gap 9e: Gap 10: Spray coater 10a: Spray head 10b: Drive unit 10b1: Robot arm

Claims

1. A method for manufacturing a panel, comprising a first bonding step and a second bonding step, In the first bonding step, a face material is bonded to a plate-shaped substrate to form a bonded body; In the second bonding step, a skin material is bonded to the bonded body to form a panel; The first bonding step includes a first application step and a first attachment step, In the first application step, a first adhesive is applied to the face material by a roll coater; In the first bonding step, the surface of the face material to which the first adhesive is applied is bonded to the base material to form the bonded body; The second adhesion step includes a second application step and a second attachment step, In a second application step, a second adhesive is applied to the skin material using a spray coater; In the second attaching step, the surface of the skin material to which the first adhesive is applied is attached to the adhesive body; In the second attaching step, the skin material is attached so as to cover at least a portion of the first main surface of the adhered body, at least a portion of the side surface of the adhered body, and at least a portion of the second main surface of the adhered body.

2. 10. The method of claim 1, A heating step is provided between the first application step and the first attachment step, In the heating step, the first adhesive applied to the face material is heated.

3. 3. The method of claim 1 or claim 2, The method wherein the first adhesive is a moisture-curable polyurethane-based hot melt adhesive.

4. The method according to any one of claims 1 to 3, The method wherein the second adhesive is a moisture-curable polyolefin-based hot melt adhesive.

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