JP2019214171A - Water transfer sheet, coating product and method of manufacturing water transfer sheet - Google Patents

Abstract

To provide a water transfer sheet that prevents manufacturing efficiency from declining.SOLUTION: The water transfer sheet includes base film and a transfer body laminated on the base film. The transfer body includes: a water-soluble adhesive layer laminated on the base film; and a non water-soluble sheet body layer laminated on the water-soluble adhesive layer. The back side of the sheet body layer, which becomes the adhesive layer side, has formed thereon, at least one drain path that extends in the thickness direction of the base film in the vertical direction and extends toward an outer edge in the vertical direction of the back side.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a water transfer sheet, a coated product, and a method for producing a water transfer sheet.

  In some cases, a water transfer sheet is used to apply a plurality of colors or patterns to a body of a vehicle such as a motorcycle (for example, a fuel tank or a cowl) (for example, see Patent Document 1). In the operation of attaching the water transfer sheet to the body, the water transfer sheet is immersed in water, the transfer body of the water transfer sheet is peeled off from the backing paper, and the transfer body is attached to the body. Remove air bubbles.

JP-A-2002-284125

  However, even when the surface of the transfer member is rubbed with a squeegee, water may remain between the transfer member and the body. The remaining water evaporates and expands in volume in a drying step after the transfer member attaching step, causing wrinkles and swelling of the transfer member. If wrinkles or blisters are generated, it is necessary to peel off the transfer body and start a new operation, which causes a problem that manufacturing efficiency is reduced.

  Therefore, an object of the present invention is to prevent a reduction in the production efficiency of a product to be decorated with a water transfer sheet.

  The water transfer sheet according to one embodiment of the present invention includes a base film and a transfer body laminated on the base film, wherein the transfer body has a water-soluble adhesive layer laminated on the base film, A water-insoluble sheet main body layer laminated on a water-soluble adhesive layer, and the back surface of the sheet main body layer on the side of the adhesive layer, in a direction perpendicular to the thickness direction of the base film. At least one drainage passage extending toward the vertical outer edge of the back surface is formed.

  According to the configuration, the transfer body is stuck to the object in a state where the water transfer sheet is immersed in water to dissolve the adhesive layer, and the base film is peeled off from the transfer body. Next, the surface of the transfer body is rubbed with a squeegee. Thereby, water between the sheet body layer and the object to be stuck can be guided to the drain passage. In addition, the water guided to the drain passage is pushed out in the vertical direction, and the water can be smoothly discharged to the outside of the patch. As a result, water remaining between the sheet body layer and the object to be stuck can be reduced, and wrinkles and swelling of the sheet body layer caused by remaining water can be prevented. Therefore, it is possible to prevent a reworking operation such as attaching a water transfer sheet and the like, and to prevent a reduction in manufacturing efficiency.

  The at least one drain passage may include a plurality of drain passages extending in two directions and crossing each other.

  According to the above configuration, the squeegee rubs the outer surface of the seat body layer in two directions, so that it is possible to preferably prevent water from remaining in the drain passage.

  The sheet body layer may be a coating film.

  According to the above configuration, since the rigidity of the sheet body layer is low and soft, by rubbing the outer surface of the sheet body layer with a squeegee, water in the drain passage can be smoothly discharged to the outside of the sheet and the surface of the sheet body layer can be removed. It can be easily flattened.

  The sheet body layer is stacked adjacent to the adhesive layer, the concealing layer in which the drain passage is formed, and one or more design layers stacked adjacent to the concealment portion to form a design surface. And a transparent portion which is laminated adjacent to the design portion and has a light transmitting property.

  According to the configuration, since the drainage passage is formed in the concealing portion, the influence of the formation of the drainage passage on the design can be suppressed.

  The first portion of the sheet body layer where the drain passage is formed may have a smaller thickness dimension than the second portion where the drain passage is not formed.

  According to the configuration, it is possible to suppress unevenness on the surface due to the formation of the drain passage.

  The surface of the sheet body layer opposite to the adhesive layer protrudes in the thickness direction in the first portion where the drain passage is formed, in comparison with the second portion where the drain passage is not formed. It may be.

  According to the configuration, by pressing the seat body layer with the squeegee, the first portion can be deformed so as to partially fill the drain passage. Thereby, irregularities on the surface of the sheet body layer due to the formation of the drain passage can be suppressed.

  The back surface of the adhesive layer on the base film side may be a flat surface, and the surface of the adhesive layer on the sheet body layer side may have a convex portion protruding toward the sheet body layer.

  According to the above configuration, by providing the adhesive layer with the convex portion, the drain passage can be easily formed in the sheet body layer.

  The surface on the sheet body layer side of the base film and the adhesive layer may have a convex portion protruding toward the sheet body layer.

  According to the above configuration, by providing the convex portion on the base film, the convex portion can be easily provided on the adhesive layer, whereby the drain passage can be easily formed on the sheet body layer.

  The coated product according to one aspect of the present invention includes a base material, the sheet main body layer of the water transfer sheet described above, a sheet main body layer attached on the base material, and the water of the sheet main body layer. A clear coat that is applied to both the surface of the sheet main body layer and the surface of the base material to which the sheet main body layer is not attached so as to cover an end opening of the passage;

  The method for producing a water transfer sheet according to one embodiment of the present invention includes forming a convex portion on the surface of the base film, and forming a convex portion on the surface of the adhesive layer by laminating a water-soluble adhesive layer on the surface of the base film. The first step of forming a portion, by laminating a water-insoluble sheet body layer on the adhesive layer, along the convex portion of the adhesive layer on the back surface of the sheet body layer on the adhesive layer side A second step in which a concave portion extending toward the outer edge of the sheet body layer is formed.

  According to the above-described manufacturing method, by providing the water-soluble adhesive layer with a convex portion, a concave portion serving as a water drain passage can be easily formed in the sheet body layer. Since the water drain passage is provided in the sheet body layer, the water between the sheet body layer and the object to be stuck can be smoothly discharged to the outside by the squeegee, thereby preventing the occurrence of rework such as sticking of the water transfer sheet. This can prevent the production efficiency from lowering.

  In the first step and the second step, the adhesive layer and the sheet body layer may be formed by screen printing.

  According to the manufacturing method, the thickness of each layer can be easily adjusted.

  ADVANTAGE OF THE INVENTION According to this invention, the fall of the manufacturing efficiency of the product decorated with the water transfer sheet can be prevented.

FIG. 1 is a side view of a motorcycle to which a water transfer sheet according to a first embodiment is applied. It is sectional drawing of the water transfer sheet shown in FIG. FIG. 3 is a plan view of the transfer body shown in FIG. 2. FIG. 3 is a cross-sectional view of a state where the transfer body of the water transfer sheet shown in FIG. 2 is attached to a fuel tank body (base material). FIG. 5 is a perspective view illustrating a draining operation for the transfer body illustrated in FIG. 4. FIG. 6 is a cross-sectional view of the sheet main body layer shown in FIG. 5 after a draining operation. FIG. 7 is a cross-sectional view showing a state where a cover coat layer is peeled off from the sheet main body layer shown in FIG. 6. FIG. 8 is a cross-sectional view illustrating a state where a clear coat is applied to the seat body layer and the fuel tank body illustrated in FIG. 7. FIG. 8 is a sectional view of a water transfer sheet according to a second embodiment, corresponding to FIG. 2. FIG. 13 is a plan view corresponding to FIG. 3 of a water transfer sheet according to a third embodiment.

  Hereinafter, embodiments will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a side view of a motorcycle 1 to which the water transfer sheet according to the first embodiment is applied. As shown in FIG. 1, the motorcycle 1 includes a front wheel 2 and a rear wheel 3. A fuel tank 7 is arranged behind the bar-shaped handle 4 held by the driver R. Behind the fuel tank 7, a seat 6 on which the driver R sits straddling is arranged. The fuel tank 7 is a painted product. In the fuel tank 7, a transfer body 12 of a water transfer sheet 10, which will be described later, is partially adhered to the fuel tank body 5 (base material). This makes it possible to produce a coated product having two or more colors, without the need for masking or the like. In the present embodiment, the base material to which the water transfer sheet 10 is applied is a fuel tank, but another component (for example, a cowl or the like) may be a base material to which the water transfer sheet 10 is applied.

  FIG. 2 is a sectional view of the water transfer sheet 10 shown in FIG. FIG. 3 is a plan view of the transfer body 12 shown in FIG. As shown in FIG. 2, the water transfer sheet 10 includes a base film 11 and a transfer body 12 laminated on the base film 11. The base film 11 is removed at the time of use. For example, a hydrophilic mount is used, but a material other than paper may be used. The transfer body 12 is obtained by removing the base film 11 from the water transfer sheet 10 and is attached to the fuel tank main body 5 to be attached.

  The transfer body 12 has an adhesive layer 13 and a sheet body layer 14, and the respective layers 13, 14 are laminated in this order from the base film 11 side by screen printing. The adhesive layer 13 is a water-soluble resin film laminated on the base film 11. The sheet body layer 14 is a water-insoluble coating film, and is laminated on the water-soluble adhesive layer 13. That is, the sheet body layer 14 is adhered to the base film 11 via the adhesive layer 13.

  The sheet body layer 14 has an adhesion concealing layer 15, a design layer 16, a clear layer 17, and a cover coat layer 18, and the respective layers 15 to 18 are laminated in this order from the adhesive layer 13 side by screen printing. The adhesion concealing layer 15 has a function of ensuring adhesion to the fuel tank body 5 as an object to be affixed (substrate), and a function of not allowing the surface color of the fuel tank body 5 to pass therethrough in order to enhance the color development of the design layer 16. And a resin film having: The outer surface of the substrate to which the adhesion concealing layer 15 adheres can be an acrylic melamine paint or an acrylic urethane paint.

  In order to ensure the adhesion of the adhesion concealing layer 15 to the base material (the fuel tank body 5), (1) sanding the outer surface of the base material to exert a van der Waals force, and (2) the adhesion concealing layer 15 (3) leaving an OH group on the surface of the coating film of the base material and adding an isocyanate to the adhesion concealing layer 15 as in a two-part curable paint. Any one of the above (1) to (3) may be employed to ensure the adhesion, but in the present embodiment, the above (1) and (2) are employed, and in particular, the (2) is closely adhered. It contributes to ensuring the quality. In this embodiment, the adhesion concealing layer 15 is a non-water-soluble adhesive having adhesiveness, but may be a simple concealing layer other than the adhesive.

  The design layer 16 is a resin film that forms an ink layer containing a pigment having a desired color. The design layer 16 is composed of one or a plurality of layers. The clear layer 17 is a transparent resin film having a light transmitting property and a function of improving the releasability of the cover coat layer 18. The cover coat layer 18 is a resin film for protecting the sheet body layer 14, and is finally peeled off.

  The sheet body layer 14 is made of a polyester resin, a urethane resin, or the like. The sheet body layer 14 has flexibility, and may be a resin such as an acrylic urethane resin, an epoxy resin, or a urethane resin, which is not completely crosslinked. For example, a thermosetting resin is used for the sheet main body layer 14, and a state in which heat enough to obtain curability is not applied, that is, a resin before forming a strong crosslinked structure is used. For example, the clear layer 17 contains a urethane-based resin, and the other layers 15, 16, and 18 contain a polyester-based resin. As an example, in each of the layers 15, 16, and 18, a polyester-based resin is used as a main agent, and another resin is mixed as an auxiliary agent. As the auxiliary agent, for example, an acrylic urethane-based two-component curable resin is used. In some cases, an isocyanate is used as a curing agent. For example, by preventing the mixture of the main agent and the auxiliary agent from being heated after application, the promotion of heat-induced crosslinking is suppressed. Further, as an auxiliary agent, a blocking agent for suppressing a crosslinking reaction may be contained. An epoxy resin is used as a main agent, and a melamine resin or an isocyanate may be contained as an auxiliary agent.

  The Tg (glass transition point) of each of the layers 15 to 18 is set at 0 ° C. to 100 ° C., preferably 20 ° C. to 80 ° C., and more preferably 40 ° C. to 60 ° C., so that the paint constituting each layer 15 to 18 is formed. Can be given soft properties.

  The base film 11 is formed with a plurality of protrusions 11a protruding toward the transfer body 12 in the thickness direction by embossing. The protrusion 11 a extends to a side edge of the base film 11 in a direction (plane direction) perpendicular to the thickness direction of the base film 11. The convex portions 11a extend in two directions and intersect with each other, and each convex portion 11a is formed in a lattice shape as a whole in plan view. Since the adhesive layer 13 is formed on the base film 11 by screen printing, a convex portion 13 a along the convex portion 11 a of the base film 11 is also formed on the adhesive layer 13. By forming the close contact concealing layer 15 on the adhesive layer 13 by screen printing, a concave portion 15 a matching the convex portion 13 a of the adhesive layer 13 is formed on the back surface of the close contact concealing layer 15.

  By performing the lamination by the screen printing in this manner, the back surface of the sheet body layer 14 on the adhesive layer 13 side is attached to the outer edge of the back surface in the direction perpendicular to the thickness direction of the base film 11 in the vertical direction. A concave portion 15a extending toward is formed. The concave portion 15a has a groove shape in which the back surface of the sheet body layer 14 on the side of the adhesive layer 13 is partially recessed, and forms a drain passage P1. The drain passage P1 is open to the outside at a side edge of the sheet body layer 14. However, the drainage passage P1 may be configured such that the drainage passage P1 is opened at the side edge of the cut sheet main body layer 14 by cutting and using the water transfer sheet 10.

  The drainage passages P1 formed by the recesses 15a extend in two directions and intersect with each other, and are provided in, for example, a lattice shape in plan view as shown in FIG. Since the drainage passage P1 is formed on the back surface of the close contact concealing layer 15, the drainage passage P1 is hard to be visually recognized from the outside, and the influence on the design is suppressed.

  The amount of protrusion of the protrusions 13a and 15a formed on each of the layers 13 to 18 decreases from the adhesive layer 13 toward the cover coat layer 18, so that the drainage passage P1 is formed in the sheet body layer 14. The first portion has a smaller dimension in the thickness direction than the second portion where the drain passage P2 is not formed. In the present embodiment, the surface of the cover coat layer 18 is flat, and irregularities on the surface due to the formation of the drain passage P1 are suppressed.

  The surface of the sheet body layer 14 on the side opposite to the adhesive layer 13 (the surface of the cover coat layer 18) is the second portion where the drain passage P1 is not formed in the first portion where the drain passage P1 is formed. It may be configured to protrude in the thickness direction from the portion. Then, the sheet body layer 14 is partially deformed so as to fill the drainage passage P1 by the operation of pressing the sheet body layer 14 with the squeegee S as described later, so that the sheet caused by the formation of the drainage passage P1 is formed. Irregularities on the outer surface of the main body layer 14 are suppressed.

  4 to 8 are cross-sectional views illustrating the operation of attaching the transfer body 12 of the water transfer sheet 10 shown in FIG. 2 to the fuel tank main body 5 (base material) to complete a product. By immersing the water transfer sheet 10 in water to dissolve the water-soluble adhesive layer 13, the transfer body 12 was slid from the base film 11 to remove the transfer body 12, and the adhesive layer 13 was exposed as shown in FIG. The transfer body 12 is attached to the painted surface 5a (front surface) of the fuel tank body 5. Then, while the dissolved adhesive layer 13 remains between the fuel tank main body 5 and the close contact concealing layer 15, the final position adjustment of the seat main body layer 14 is performed.

  Next, as shown in FIG. 5, by rubbing the outer surface of the sheet main body layer 14 (cover coat layer 18) with a squeegee S, water between the seat main body layer 14 and the fuel tank main body 5 is drained from the drain passage P1. And the water is discharged to the outside from the side edge of the sheet main body layer 14 through the drain passage P1. By rubbing the outer surface of the sheet body layer 14 in two directions with the squeegee S, it is possible to preferably prevent water from remaining in the drain passage P1. Further, since the sheet main body layer 14 is a coating film and has low rigidity and softness, the surface of the sheet main body layer 14 is rubbed with the squeegee S so that water in the drain passage P1 can be smoothly discharged to the outside of the sheet main body layer 14. The sheet can be discharged and the surface of the sheet body layer 14 can be easily flattened.

  Next, as shown in FIG. 6, when the work of draining the sheet main body layer 14 is completed, the adhesive layer 13 dissolved in water is discharged to the outside from between the fuel tank main body 5 and the close contact concealing layer 15. . In addition, when the sheet body layer 14 is pressed by the squeegee S, the drainage passage P1 disappears from the back surface of the close contact concealing layer 15, and the shape follows the painted surface 5a of the fuel tank body 5. The water-soluble adhesive layer 13 may remain between the fuel tank body 5 and the close contact concealing layer 15 to function as an adhesive.

  Next, as shown in FIG. 7, the worker peels off and removes the cover coat layer 18 from the clear layer 17. Then, as shown in FIG. 8, the fuel tank 7 is formed by applying the clear coat 19 to both the surface of the sheet body layer 14 from which the cover coat layer 18 is removed and the painted surface 5 a of the fuel tank body 5. . Thereby, even if the drainage passage P1 remains between the close contact concealing layer 15 and the fuel tank main body 5, the end opening of the remaining drainage passage P1 is covered with the clear coat 19, and the drainage passage P1 is formed. Water is prevented from entering the P1 from outside. Thereafter, the process proceeds to the drying step.

  According to the configuration described above, water remaining between the seat body layer 14 and the fuel tank body 5 can be reduced, and wrinkles and swelling of the seat body layer 14 caused by remaining water can be prevented. . Therefore, the aesthetic appearance of the final product is improved, and the occurrence of rework such as the attachment of the water transfer sheet 10 is prevented, so that a reduction in manufacturing efficiency can be prevented. Further, it is possible to shorten the time required for the drainage work by the squeegee S. Further, by arranging the drain passage P1 along the longitudinal direction of the base material (the fuel tank main body 5), for example, the number of times of rubbing with the squeegee S can be reduced. If the drain passage P1 is arranged, for example, to extend along the short direction of the base material (the fuel tank body 5), the distance of one rubbing by the squeegee S can be shortened.

(Second Embodiment)
FIG. 9 is a cross-sectional view corresponding to FIG. 2 of the water transfer sheet 110 according to the second embodiment. As shown in FIG. 9, in the water transfer sheet 110 of the second embodiment, the base film 111 is flat, and the back surface of the adhesive layer 113 on the base film 111 side is also flat. The adhesive layer 113 is screen-printed on the surface of the adhesive layer 113 on the sheet body layer 14 side so as to have a convex portion 113a protruding toward the sheet body layer 14. The contact concealing layer 15 is formed on the adhesive layer 113 by screen printing, so that a concave portion 15a matching the convex portion 113a of the adhesive layer 113 is formed on the back surface of the adhesive concealing layer 15, and the concave portion 15a allows the drainage passage P1 to be formed. Is formed. The other configuration is the same as that of the first embodiment described above, and the description is omitted.

(Third embodiment)
FIG. 10 is a plan view corresponding to FIG. 3 of the water transfer sheet 210 according to the third embodiment. As shown in FIG. 10, in the water transfer sheet 210 of the third embodiment, the back surface of the adhesion concealing layer of the transfer body 212 laminated on the base film 211 (the back surface of the sheet body layer) protrudes toward the base film 211. A large number of spot-shaped convex portions 215a are formed in an island shape. As a result, a concave portion 215b extending toward the outer edge in the vertical direction of the back surface in a direction perpendicular to the thickness direction of the base film 211 is formed on the rear surface of the sheet main body layer on the base film 211 side. The recess 215b forms the drain passage P2. Note that other configurations are the same as those of the above-described first or second embodiment, and a description thereof will be omitted.

  The drain passages P1 and P2 may be formed in a lattice shape, an island shape, a radial shape, or a passage shape according to a design. For example, when the design has a pattern in which a line extending in a predetermined direction appears, a drain passage may be formed along the line. Further, a passage may be formed along a direction perpendicular to the line. This makes it easier for the operator to instruct the direction in which the squeegee S is to be moved. In addition, since the drain passage is formed along the line, even if the drain passage is visually recognized from the outside, a sense of discomfort can be suppressed.

5 Fuel tank body (base material)
7 Fuel tank (painted product)
10, 110, 210 Water transfer sheet 11, 111, 211 Base film 11a Convex part 12, 112, 212 Transfer body 13, 113 Adhesive layer 13a, 113a Convex part 14 Sheet body layer 15, 215 Close contact concealment layer 16 Design layer 17 Clear Layer 18 Cover coat layer 19 Clear coat P1, P2 Drainage passage S Squeegee

Claims (11)

A base film,
A transfer member laminated on the base film,
The transfer body has a water-soluble adhesive layer laminated on the base film, and a water-insoluble sheet body layer laminated on the water-soluble adhesive layer,
At least one drainage passage extending toward the outer edge in the vertical direction of the back surface in a direction perpendicular to the thickness direction of the base film is formed on the back surface of the sheet body layer on the side of the adhesive layer. Have a water transfer sheet.   The water transfer sheet according to claim 1, wherein the at least one drain passage includes a plurality of drain passages extending in two directions and crossing each other.   The water transfer sheet according to claim 1, wherein the sheet body layer is a coating film. The sheet body layer,
A concealment layer that is laminated adjacent to the adhesive layer and in which the drain passage is formed,
One or more design layers laminated adjacent to the concealing portion to form a design surface,
The water transfer sheet according to any one of claims 1 to 3, further comprising: a transparent layer that is laminated adjacent to the design portion and has a light-transmitting property.   5. The sheet portion according to claim 1, wherein the first portion of the sheet body layer where the drain passage is formed has a smaller dimension in a thickness direction than the second portion where the drain passage is not formed. 6. The water transfer sheet as described in the above.   The surface of the sheet body layer on the side opposite to the adhesive layer protrudes in a thickness direction in a first portion where the drain passage is formed than in a second portion where the drain passage is not formed. The water transfer sheet according to claim 1. The back surface on the base film side of the adhesive layer is a flat surface,
The water transfer sheet according to any one of claims 1 to 6, wherein a surface of the adhesive layer on the sheet body layer side has a convex portion protruding toward the sheet body layer.   The water transfer sheet according to any one of claims 1 to 6, wherein a surface of the base film and the adhesive layer on the sheet body layer side has a protrusion protruding toward the sheet body layer. A substrate,
The sheet body layer of the water transfer sheet according to any one of claims 1 to 8, wherein the sheet body layer has a cover coat layer on an outermost surface and is attached to the base material,
A surface of the sheet body layer and a surface of the substrate on which the sheet body layer is not attached, so as to cover an end opening of the drain passage of the sheet body layer in a state where the cover coat layer is peeled off. And a clear coat to be applied to both. Forming a convex portion on the surface of the base film, a first step of forming a convex portion on the surface of the adhesive layer by laminating a water-soluble adhesive layer on the surface of the base film;
By laminating a water-insoluble sheet body layer on the adhesive layer, an outer edge of the sheet body layer is formed along the convex portion of the adhesive layer on the back surface of the sheet body layer on the adhesive layer side. And a second step in which a concave portion extending is formed.   The method for producing a water transfer sheet according to claim 10, wherein in the first step and the second step, the adhesive layer and the sheet body layer are formed by screen printing.

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