JP2018012207A - Decorative member manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method capable of making a decoration finish better and manufacturing a decorative member in a shorter time period.SOLUTION: The decorative member manufacturing method comprises: a decorative layer forming step S10 of feeding decorative ink to the surface of a sheet thereby to form a decorative layer in a semi-cured or cured state; an uncured adhesive layer forming step S20 of feeding an electron beam-curing adhering ink over the decorative layer thereby to form uncured adhesive layer; a sheet/adherend laminating step S30 of laminating the uncured adhesive layer side of the sheet onto an adherend; an electron beam irradiating step S40 of irradiating an electron beam to cured an uncured adhesive layer; and a sheet peeling step S50 of peeling the sheet from the adherend.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for producing a decorative member.

  As a method for decorating a molded product, painting, PAD printing, screen printing, water transfer, mold transfer, thermal transfer, and the like are conventionally known. Painting is a general-purpose decoration method as a method of decorating a molded body having a complicated shape, but if you want to decorate a molded product with characters or designs, you have to mask it. There's a problem. PAD printing and screen printing may not be able to be performed depending on the size and shape of the unevenness when the molded product has unevenness. In addition, when performing multicolor printing, it is necessary to remove the molded body from the jig for each process, and therefore there is a risk that printing may be displaced due to displacement during setting and machine accuracy. Furthermore, since it is necessary to perform printing and drying for each process, there is also a problem that foreign matters are easily attached to the molded body.

  In the case of the water transfer method, since the transfer method is a manual operation, skilled techniques are required to perform high-precision decoration. The water transfer method is a method in which a water-soluble transfer sheet is immersed in water, the display body is floated, the underwater molded body is moved upward from directly below the display body, and the transfer sheet is attached to a desired position on the molded body. . For this reason, there is a high risk of the transfer sheet coming off the desired position. In addition, in the case of water transfer, a transfer agent for bringing the ink and the molded product into close contact is required. Further, in the case of the mold transfer method and the water transfer method, transfer may not be possible depending on the shape of the molded product.

  In order to solve the above-mentioned problem, for example, when transferring a transfer material formed by supporting a transparent, colored or vapor-deposited thermoplastic resin film onto a base material sheet having peelability, the transfer material is previously transferred. Alternatively, a method is known in which an adhesive is applied to the molded body or both, the transfer material and the molded body are pressurized before the adhesive is cured, and the base sheet is peeled off after the adhesive is cured (patent) Reference 1). In addition, when transferring a crosslinked polychromatic silicone ink to a silicone rubber substrate, a method is also known in which an unvulcanized liquid silicone composition is used as an adhesive and the composition is crosslinked by heating (Patent Document). 2). Furthermore, when transferring a silicone rubber ink to a silicone rubber molded body, a method is also known in which a silicone rubber ink is used for an adhesive layer and the ink is cured by heating and pressing (see Patent Document 3).

JP-A-9-109600 JP2013-111809A JP 2002-59634 A

  However, the decoration methods described in Patent Documents 1 to 3 have the following problems. That is, at least one of heating and pressurization must be performed during the transfer process. Heating or pressurizing may cause damage to the adherend or transfer material, and may adversely affect the finish. Further, in curing by heating or pressurization, a long time is required for curing.

  This invention is made | formed in order to solve the said subject, Comprising: The finish of a decoration is made more favorable and it aims at manufacturing a decorating member in a shorter time.

  The method for producing a decorative member according to one embodiment for achieving the above object is a decorative layer forming step of forming a semi-cured or cured decorative layer by supplying decorative ink to the surface of the sheet And an uncured adhesive layer forming step of forming an uncured adhesive layer by supplying an electron beam curable adhesive ink above the decorative layer, and laminating the uncured adhesive layer side of the sheet on the adherend. It is a method for producing a decorative member, which includes a sheet / adhered body lamination step, an electron beam irradiation step of irradiating an electron beam to cure the uncured adhesive layer, and a sheet peeling step of peeling the sheet from the adherend. .

  A method for manufacturing a decorative member according to another embodiment includes a second adhesive layer forming step of forming a second adhesive layer by supplying a second adhesive ink on the decorative layer, and a second adhesive layer A second decorative layer forming step of forming a semi-cured or cured second decorative layer thereon may further be included.

  In the method for manufacturing a decorative member according to another embodiment, the second decorative layer may be a decorative foil.

  In the method for manufacturing a decorative member according to another embodiment, the second adhesive ink may include a curable silicone composition.

  In the method for manufacturing a decorative member according to another embodiment, the decorative ink may contain a curable silicone composition.

  In the method for manufacturing a decorative member according to another embodiment, the adhesive ink may include a curable silicone composition.

  In the method for manufacturing a decorative member according to another embodiment, the adherend may be a silicone elastomer.

  In the method for manufacturing a decorative member according to another embodiment, in the sheet / adherent stacking step, the sheet and the layer formed on the surface thereof are bent or cut in accordance with the surface shape of the adherend. The uncured adhesive layer side of the sheet may be laminated on the adherend.

  ADVANTAGE OF THE INVENTION According to this invention, the finishing of decoration can be made more favorable and a decorating member can be manufactured in a shorter time.

FIG. 1: shows the flow of the main processes of the manufacturing method of the decorating member which concerns on 1st Embodiment. FIG. 2 shows the production status in each step of FIG. 1 in a longitudinal sectional view of the decorative member. FIG. 3: shows the flow of the main processes of the manufacturing method of the decorating member which concerns on 2nd Embodiment. FIG. 4 shows the manufacturing status in each step of FIG. 3 in a longitudinal sectional view of the decorative member. FIG. 5 shows the manufacturing status in each step of FIG. 3 in a longitudinal sectional view of another decorative member different from FIG. FIG. 6: shows the flow of the main processes of the manufacturing method of the decorating member which concerns on 3rd Embodiment. FIG. 7 shows the manufacturing status in each step of FIG. 6 in a longitudinal sectional view of the decorative member. FIG. 8 is a modified example of the method for manufacturing a decorative member according to each of the first to third embodiments, and various cross-sectional views (8A, 8B, 8C). FIG. 9 shows the situation in each step of the method for manufacturing a decorative member according to Reference Example 1 in a longitudinal sectional view of the decorative member. FIG. 10 shows the situation in each step of the method for manufacturing a decorative member according to Reference Example 2 in a longitudinal sectional view of the decorative member.

  Next, each embodiment of the present invention will be described with reference to the drawings. The embodiments described below do not limit the invention according to the claims, and all the elements and combinations thereof described in the embodiments are the means for solving the present invention. It is not always essential.

(First embodiment)
FIG. 1: shows the flow of the main processes of the manufacturing method of the decorating member which concerns on 1st Embodiment.

  The manufacturing method of the decoration member which concerns on 1st Embodiment supplies the decoration ink to the surface of a sheet | seat, and the decoration layer formation process (step S10) which forms the semi-hardened or hardening state decoration layer, An uncured adhesive layer forming step (step S20) of forming an uncured adhesive layer by supplying an electron beam curable adhesive ink above the decorative layer, and the uncured adhesive layer side of the sheet on the adherend Laminating sheet and adherend stacking step (step S30), electron beam irradiation step of irradiating an electron beam to cure the uncured adhesive layer (step S40), and sheet peeling step of peeling the sheet from the adherend ( Step S50).

  FIG. 2 shows the production status in each step of FIG. 1 in a longitudinal sectional view of the decorative member.

  As shown in FIG. 2 (2A), the sheet 1 is prepared prior to the production of the decorative member. The sheet 1 is a transfer film, and is a film that is peeled off when the decorative layer or adhesive layer on the sheet 1 is transferred to the adherend side. As the sheet | seat 1, what performed the surface treatment (referred to as mold release process) for releasing a decoration layer or an adhesive layer on the single side | surface of a resin film can be illustrated suitably. The resin that is the main material of the sheet 1 is polyethylene, polypropylene, polymethyl methacrylate (PMMA), polystyrene, polyacetal, polyamide 6, polyamide 66, polyamide 610, polyester, polycarbonate, ABS resin, polyether ether ketone (PEEK). Or those composites etc. can be used conveniently.

Step S10 (decorative layer forming step)
Next, as shown in FIG. 2 (2B), the decorative layer 2 is formed on the surface of the sheet 1 that has been subjected to the mold release process, using a decorative ink. Although there is no restriction | limiting in particular as a formation method of the decoration layer 2, Printing is preferable. As the decorative ink, any kind of ink containing a curable elastomer composition can be used. For example, as decoration ink, silicone ink that can form a silicone elastomer layer, urethane ink that can form a urethane elastomer layer, epoxy ink that can form an epoxy resin layer, and polyester resin layer can be formed Examples thereof include a polyester-based ink, a polyamide-based ink capable of forming a polyamide resin layer, and a polyimide-based ink capable of forming a polyimide resin layer. Among these decorative inks, silicone ink or urethane ink is particularly preferable.

  The decorative ink is interpreted in a broad sense so as to include both colored ink and colorless (also referred to as transparent) ink. The decorative ink is preferably colored ink as in this embodiment. When the decorative ink is a colored ink, the decorative ink preferably contains a colored pigment (filler is also included in the pigment) or a colored dye. A decorative ink containing a pigment is preferable to an ink containing a dye because it is superior in terms of weather resistance or hardness after forming a decorative layer. On the other hand, when the decorative ink is a colorless ink, the decorative ink does not include a pigment or a dye. When the colorless ink is cured, it is possible to form a layer that has both a function as a decorative layer that makes it possible to visually recognize an internal pattern or the like in the front direction and a function as a scratch-proof layer from the front side.

  When the decorative layer 2 is formed using the decorative ink, after the decorative ink is discharged, the decorative ink is cured by drying before the next step S20 (uncured adhesive layer forming step). It is preferable to make it. However, the decorative ink may be completely cured or semi-cured as long as mixing of the decorative ink and the adhesive ink used in the next step can be prevented. When performing multicolor printing using a plurality of decorative inks, it is preferable to perform the next printing after drying for each color. This is to prevent mixing of the decorative inks. In addition, when performing multicolor printing using a plurality of decorative inks, printing may be partially overlapped in order to improve design. The thickness of the decorative layer 2 is preferably 1 to 300 μm, more preferably 3 to 200 μm, and even more preferably 5 to 100 μm. In the case of multicolor printing, a step may be formed in the decorative layer 2.

Step S20 (uncured adhesive layer forming step)
Following step S10, as shown in FIG. 2 (2C), the adhesive ink is supplied from above the decorative layer 2 to form the uncured adhesive layer 3a. In FIG. 2 (2C) and subsequent figures, the uncured adhesive layer 3a is shown in white. The adhesive ink is preferably a transparent ink containing no pigment or dye. When there is a step in the decorative layer 2, it is preferable to eliminate the step after supplying the adhesive ink from above to form the uncured adhesive layer 3a. The bonding ink includes an electron beam curable resin composition that can be cured by irradiation with an electron beam in a later step. The composition may be a radically polymerizable composition or a cationically polymerizable composition. The resin-based oligomer used for electron beam curing is preferably a liquid phase mixture of a prepolymer having a vinyl polymerizable unsaturated group and a monomer. Of the adhesive inks, silicone-based inks are particularly preferable. The adhesive ink is not applied to the curing process after being supplied above the decorative layer 2. For this reason, the uncured adhesive layer 3a is rich in subsequent adhesive ability to the adherend and deformability along the surface form of the adherend. The laminate of the sheet 1, the decorative layer 2, and the uncured adhesive layer 3 a constitutes a decorative transfer sheet 7. The average thickness of the uncured adhesive layer 3a is preferably 1 to 400 μm, more preferably 5 to 300 μm, and still more preferably 10 to 200 μm.

Step S30 (sheet and adherend lamination step)
Subsequent to step S20, as shown in FIG. 2 (2D), the uncured adhesive layer 3a side of the decorative transfer sheet 7 is bonded to the surface of the adherend 4, and the both 7 and 4 are laminated. The adherend 4 is preferably composed of a thermosetting elastomer such as urethane rubber, isoprene rubber, ethylene propylene rubber, natural rubber, ethylene propylene diene rubber, styrene butadiene rubber, and silicone rubber; or a composite thereof, and particularly preferably. Is made of silicone rubber, which is an example of a silicone elastomer. The adherend 4 may form a coat layer containing a silane compound. The rubber-like elastic body constituting the adherend 4 may be either primary vulcanized or secondary vulcanized. The adherend 4 may be colored or colorless. Examples of the rubber-like elastic composition capable of forming the adherend 4 include, for example, X-34-1802A / B “manufactured by Shin-Etsu Chemical Co., Ltd.” (Hereinafter, simply referred to as “rubber hardness A”) 15 to 35 ”, X-32-2170A / B manufactured by Shin-Etsu Chemical Co., Ltd.“ The rubber hardness A of the cured product is 10 to 25 ”, Shin-Etsu Chemical KE-1935A / B “Rubber hardness A of cured product is about 55”, Shin-Etsu Chemical Co., Ltd. KE-1950A / B “Rubber hardness A of cured product is 10 to 70”, Shin-Etsu Chemical KE-1988A / B “Rubber hardness A of the cured product is about 62” manufactured by Kogyo Co., Ltd. can be suitably exemplified. The rubber hardness A of the adherend 4 is preferably 10 or more and 80 or less.

Step S40 (electron beam irradiation process)
Following step S30, as shown in FIG. 2 (2E), an electron beam is irradiated from the sheet 1 side toward the decorative layer 2 and the uncured adhesive layer 3a side. As a result, the uncured adhesive layer 3a is cured. In addition, when the decoration layer 2 is a semi-hardened state, the decoration layer 2 also hardens | cures completely. The electron beam irradiation is preferably performed under the condition that the absorbed dose is 30 to 500 kGy. If a single electron beam irradiation does not satisfy the absorbed dose, a plurality of irradiations may be performed. A preferable range of the acceleration voltage of the electron beam is 150 to 500 keV. Even if the decorative layer 2 contains a pigment, the electron beam is not absorbed by the pigment. For this reason, the electron beam is more advantageous for curing the uncured adhesive layer 3a from the decorative layer 2 side than ultraviolet light or visible light.

Step S50 (sheet peeling process)
Following step S40, as shown in FIG. 2 (2F), when the sheet 1 is peeled from the decorative transfer sheet 7, the decorative layer 2 and the adhesive layer 3 (the layer in which the uncured adhesive layer 3a is cured) are formed. The decorative member 10 in a state of being bonded to the adherend 4 is completed.

(Second Embodiment)
Next, 2nd Embodiment of the manufacturing method of the decorating member of this invention is described. In the description of the second embodiment, portions common to the first embodiment are denoted by the same reference numerals, and redundant description is omitted for the description of the first embodiment.

  FIG. 3: shows the flow of the main processes of the manufacturing method of the decorating member which concerns on 2nd Embodiment.

  The manufacturing method of the decorating member which concerns on 2nd Embodiment supplies the ink for 2nd adhesion on a decorating layer after a decorating layer formation process (step S10) and step S10, and is a 2nd adhesive layer. The second decorative layer forming step (step S11) for forming the second decorative layer forming step (step S11) and the second decorative layer forming step (step S11) for forming the semi-cured or cured second decorative layer on the second adhesive layer after step S11 S12), an uncured adhesive layer forming step (step S20), a sheet / adherent stacking step (step S30), an electron beam irradiation step (step S40), and a sheet peeling step (step S50). . The second embodiment differs from the first embodiment in that step S20 is performed after step S10 and then step S11 and step S12, and is substantially the same as the first embodiment in other points. .

  FIG. 4 shows the manufacturing status in each step of FIG. 3 in a longitudinal sectional view of the decorative member.

  As shown in FIG. 4 (4A), the sheet 1 is prepared prior to the production of the decorative member.

Step S10 (decorative layer forming step)
Next, as shown in FIG. 4 (4B), the decorative layer 2 is formed on the surface of the sheet 1 that has been subjected to the mold release process using the decorative ink. When the decoration ink is a colorless ink, a clear layer that can be positioned as a subordinate concept of the decoration layer 2 can be formed. About the formation method of the decorating layer 2, and the ink for decorating, it is common in 1st Embodiment. However, in this embodiment, the decorative layer 2 is formed only on one layer by monochromatic printing on the entire surface of the sheet 1 subjected to the release treatment.

Step S11 (second adhesive layer forming step)
Subsequent to step S <b> 10, as shown in FIG. 4 (4 </ b> C), the island-shaped or line-shaped second adhesive layer 5 is formed on the decorative layer 2. As the second adhesive ink for forming the second adhesive layer 5, any curable composition may be used, but in this embodiment, urethane ink is preferably used. Although there is no restriction | limiting in particular about the method of supplying the ink for 2nd adhesion | attachment on the decorating layer 2, Printing can be illustrated suitably. The second adhesive layer 5 does not need to function as a decorative layer. For this reason, the second adhesive ink does not need to contain a pigment or a dye, but there is no problem even if it contains it. When the second adhesive ink is supplied onto the decorative layer 2 to form the second adhesive layer 5, it is preferable to heat the ink after supplying it to cure the ink. Before forming the second adhesive layer 5 on the decorative layer 2, the decorative layer 2 is subjected to easy-adhesive surface treatment such as corona treatment or frame treatment, and the decorative layer 2 and the second adhesive layer 5 It is preferable to improve the adhesion.

Step S12 (second decorative layer forming step)
Subsequent to step S <b> 11, as shown in FIG. 4 (4 </ b> D), the second decorative layer 6 is formed on the second adhesive layer 5. The second decorative layer 6 can be formed on the second adhesive layer 5 by supplying a decorative ink by printing or by adhering a foil made of a decorative metal or the like. Here, an example in which a foil is bonded as the second decorative layer 6 will be described. The foil can be formed by printing using a paint containing a metal powder such as gold, silver, copper, or aluminum, or ceramic powder such as zirconium or alumina. Further, the adhesion of the foil may be, for example, attachment of a thin thin film such as metal. The second decorative layer 6 may be a cured body, but may be a semi-cured layer as long as it is not mixed with the uncured adhesive layer 3a formed in the next step.

Step S20 (uncured adhesive layer forming step)
Subsequent to step S12, as shown in FIG. 4 (4E), the adhesive ink is supplied from above the second decorative layer 6 to form the uncured adhesive layer 3a.

Step S30 (sheet and adherend lamination step)
Subsequent to step S20, as shown in FIG. 4 (4F), the uncured adhesive layer 3a side of the decorative transfer sheet 7 is bonded to the surface of the adherend 4, and the both 7 and 4 are laminated.

Step S40 (electron beam irradiation process)
Subsequent to step S30, as shown in FIG. 4 (4G), an electron beam is irradiated from the sheet 1 side toward the decorative layer 2 and the uncured adhesive layer 3a side. As a result, the uncured adhesive layer 3a is cured. In addition, when the decoration layer 2 or the 2nd decoration layer 6 is a semi-hardened state, these also harden | cure completely.

Step S50 (sheet peeling process)
Subsequent to step S40, as shown in FIG. 4 (4H), when the sheet 1 is peeled from the decorative transfer sheet 7, the decorative layer 2, the second decorative layer 6, and the adhesive layer 3 (uncured adhesive layer 3a). The decorative member 10 in a state where the layer is cured to the adherend 4 is completed.

  FIG. 5 shows the manufacturing status in each step of FIG. 3 in a longitudinal sectional view of another decorative member different from FIG.

  As shown in FIG. 5 (5A), the sheet 1 is prepared prior to the production of the decorative member.

Step S10 (decorative layer forming step)
Next, as shown in FIG. 5 (5B), the decorative layer 2 is formed on the surface of the sheet 1 that has been subjected to the mold release process, using a decorative ink. In addition, when the decoration ink is a colorless ink, it can replace with the decoration layer 2 and can also be called a clear layer. About the formation method of the decorating layer 2, and the ink for decorating, it is common in 1st Embodiment.

Step S11 (second adhesive layer forming step)
Subsequent to step S10, the second adhesive layer 5 is formed on the decorative layer 2 as shown in FIG.

Step S12 (second decorative layer forming step)
Following step S <b> 11, as shown in FIG. 5 (5 </ b> D), the second decorative layer 6 is formed on the second adhesive layer 5. The second decorative layer 6 can be formed on the second adhesive layer 5 by supplying a decorative ink by printing or by adhering a foil made of a decorative metal or the like. In FIG. 5, it demonstrates by the example which forms the 2nd decoration layer 6 by printing. The second decorative layer 6 is a layer decorated by, for example, ink jet printing. The second decorative layer 6 may be a cured body, but may be a semi-cured layer as long as it is not mixed with the uncured adhesive layer 3a formed in the next step.

Step S20 (uncured adhesive layer forming step)
Subsequent to step S12, as shown in FIG. 5 (5E), the bonding ink is supplied from above the second decorative layer 6 to form the uncured adhesive layer 3a.

Step S30 (sheet and adherend lamination step)
Subsequent to step S20, as shown in FIG. 5 (5F), the uncured adhesive layer 3a side of the decorative transfer sheet 7 is bonded to the surface of the adherend 4, and the both 7 and 4 are laminated.

Step S40 (electron beam irradiation process)
Subsequent to step S30, as shown in FIG. 5 (5G), an electron beam is irradiated from the sheet 1 side toward the decorative layer 2 and the uncured adhesive layer 3a side. As a result, the uncured adhesive layer 3a is cured. In addition, when the decoration layer 2 or the 2nd decoration layer 6 is a semi-hardened state, these also harden | cure completely.

Step S50 (sheet peeling process)
Subsequent to step S40, as shown in FIG. 5 (5H), when the sheet 1 is peeled from the decorative transfer sheet 7, the decorative layer 2, the second decorative layer 6, and the adhesive layer 3 (uncured adhesive layer 3a). The decorative member 10 in a state where the layer is cured to the adherend 4 is completed.

(Third embodiment)
Next, 3rd Embodiment of the manufacturing method of the decorating member of this invention is described. In the description of the third embodiment, portions common to the previous embodiments are denoted by the same reference numerals, and redundant descriptions are omitted for the description of the previous embodiments.

  FIG. 6: shows the flow of the main processes of the manufacturing method of the decorating member which concerns on 3rd Embodiment.

  The decorative member manufacturing method according to the third embodiment includes a decorative layer forming step (step S10), a second adhesive layer forming step (step S11), and a second decorative layer forming step (step S12). , A processing step (step S13) for processing the second decorative layer, an uncured adhesive layer forming step (step S20), a sheet / adherent stacking step (step S30), and an electron beam irradiation step ( Step S40) and a sheet peeling process (Step S50). The third embodiment differs from the second embodiment in that step S <b> 13 is performed after step S <b> 12 and then step S <b> 20 is performed, and is otherwise substantially the same as the second embodiment.

  FIG. 7 shows the manufacturing status in each step of FIG. 6 in a longitudinal sectional view of the decorative member.

  As shown in FIG. 7 (7A), the sheet 1 is prepared prior to the production of the decorative member.

Step S10 (decorative layer forming step)
Next, as shown in FIG. 7 (7B), the decoration layer 2 is formed on the surface of the sheet 1 that has been subjected to the mold release process using the decoration ink. In addition, a clear layer can be formed when the decoration ink is a colorless ink. The decorative layer 2 is formed on the entire surface of one side of the sheet 1.

Step S11 (second adhesive layer forming step)
Subsequent to step S10, the second adhesive layer 5 is formed on the decorative layer 2 as shown in FIG. 7 (7C).

Step S12 (second decorative layer forming step)
Subsequent to step S <b> 11, as shown in FIG. 7 (7 </ b> D), the second decorative layer 6 is formed on the second adhesive layer 5. The second decorative layer 6 can be formed on the second adhesive layer 5 by supplying a decorative ink by printing or by adhering a foil made of a decorative metal or the like. In FIG. 7, the 2nd decoration layer 6 is formed from the foil similar to the example of FIG.

Step S13 (processing step)
Subsequent to step S12, as shown in FIG. 7 (7E), a laser is irradiated from the surface on the front side of the second decorative layer 6, and the second decorative layer 6 is partially scraped off to obtain characters, characters, symbols. Alternatively, it is processed into a shape such as a number. Laser processing is excellent in that fine processing is possible. However, the processing steps are not limited to those by laser processing, and any method may be used as long as the second decorative layer 6 can be processed into a desired shape. Examples of the processing technique include chemical etching using acid or alkali.

Step S20 (uncured adhesive layer forming step)
Subsequent to step S12, as shown in FIG. 7 (7F), the adhesive ink is supplied from above the second decorative layer 6 to form the uncured adhesive layer 3a.

Step S30 (sheet and adherend lamination step)
Subsequent to step S20, as shown in FIG. 7 (7G), the uncured adhesive layer 3a side of the decorative transfer sheet 7 is bonded to the surface of the adherend 4, and the layers 7 and 4 are laminated.

Step S40 (electron beam irradiation process)
Subsequent to step S30, as shown in FIG. 7 (7H), an electron beam is irradiated from the sheet 1 side toward the decorative layer 2 and the uncured adhesive layer 3a side. As a result, the uncured adhesive layer 3a is cured. In addition, when the decoration layer 2 or the 2nd decoration layer 6 is a semi-hardened state, these also harden | cure completely.

Step S50 (sheet peeling process)
Subsequent to step S40, as shown in FIG. 7 (7I), when the sheet 1 is peeled from the decorative transfer sheet 7, the decorative layer 2, the second decorative layer 6, and the adhesive layer 3 (uncured adhesive layer 3a). The decorative member 10 in a state where the layer is cured to the adherend 4 is completed.

(Modification of each embodiment)
FIG. 8 is a modified example of the method for manufacturing a decorative member according to each of the first to third embodiments, and various cross-sectional views (8A, 8B, 8C).

  As shown in FIG. 8 (8A), when the decorative layer 2 (and may include the second decorative layer 6) is formed on the curved surface 4a of the adherend 4, the decorative transfer sheet is used. 7 is curved along the curved surface 4a, the uncured adhesive layer 3a side is attached to the curved surface 4a, and then the uncured adhesive layer 3a is cured by irradiating an electron beam from the sheet 1 side. The sheet 1 may be peeled off. Thus, since the decorative transfer sheet 7 provided with the decorative layer 2 and the uncured adhesive layer 3a on the sheet 1 is a thin film mainly composed of an elastomer, it can be deformed into a form along the curved surface 4a.

  Moreover, as shown in FIG. 8 (8B), in the case where the decorative layer 2 (and may include the second decorative layer 6) is formed in the V-shaped groove 4b of the adherend 4, After the entire transfer sheet 7 is bent along the V-shaped groove 4b and the uncured adhesive layer 3a side is attached to the curved surface 4a, an electron beam is irradiated from the sheet 1 side to unbond the uncured adhesive layer 3a. It is only necessary to cure and finally peel off the sheet 1. When the decorative transfer sheet 7 is bent, the decorative transfer sheet 7 may be bent from a portion (for example, perforation) 11 corresponding to the valley of the V-shaped groove 4b. The reason why such bending is possible is that the decorative transfer sheet 7 is a thin film mainly composed of an elastomer.

  Furthermore, as shown in FIG. 8 (8C), the decoration layer 2 (and may include the second decoration layer 6) may be formed on the stepped upper surface 4c of the adherend 4 having a stepped portion. The decorative transfer sheet 7 is cut into an appropriate size, and the uncured adhesive layer 3a side is attached to each step upper surface 4c, and then irradiated with an electron beam from the sheet 1 side to uncured adhesive layer 3a. Is cured and finally the sheet 1 is peeled off. As described above, the decorative transfer sheet 7 provided with the decorative layer 2 and the uncured adhesive layer 3a on the sheet 1 is a thin film mainly composed of an elastomer, and therefore easily matches the size of the step upper surface 4c. Can be cut.

  In this manner, in the sheet / adherent stacking step in which the decorative transfer sheet 7 is attached to the adherend 4, the sheet 1 and the layer formed on the surface thereof are matched with the surface shape of the adherend 4. The uncured adhesive layer 3a side of the sheet 1 can be laminated on the adherend 4 by bending or cutting.

(Reference Example 1)
The manufacturing method of the decoration member which concerns on the reference example 1 supplies the ink for decoration to the surface of a sheet | seat, and forms the uncured decoration layer (or semi-hardened state) decoration layer (step) (step) S14), a sheet / adherent lamination step (step S30) for laminating the uncured decorative layer side of the sheet on the adherend, and electron beam irradiation for irradiating an electron beam to cure the uncured decorative layer A process (step S40) and a sheet peeling process (step S50) for peeling the sheet from the adherend.

  FIG. 9 shows the situation in each step of the method for manufacturing a decorative member according to Reference Example 1 in a longitudinal sectional view of the decorative member.

  As shown in FIG. 9 (9A), the sheet 1 is prepared prior to the production of the decorative member.

Step S14 (uncured decorative layer forming step)
Next, as shown in FIG. 9 (9B), the uncured decorative layer 2a is formed on the surface of the sheet 1 which has been subjected to the mold release process, using an electron beam curable decorative ink. The decorating ink is preferably a silicone-based ink, as in the first embodiment. The uncured decorative layer 2a is in a state before curing and is preferably formed by printing.

Step S30 (sheet and adherend lamination step)
Subsequent to step S14, as shown in FIG. 9 (9C), the uncured decorative layer 2a side of the decorative transfer sheet 7 is bonded to the surface of the adherend 4, and the both 7 and 4 are laminated. .

Step S40 (electron beam irradiation process)
Subsequent to step S30, as shown in FIG. 9 (9D), an electron beam is irradiated from the sheet 1 side toward the uncured decorative layer 2a side. As a result, the uncured decorative layer 2 a is cured and becomes the decorative layer 2.

Step S50 (sheet peeling process)
Subsequent to step S40, as shown in FIG. 9 (9E), when the sheet 1 is peeled from the decorative transfer sheet 7, the decorative member 10 in a state where the decorative layer 2 is bonded to the adherend 4 is completed. .

(Reference Example 2)
The method for producing a decorative member according to Reference Example 2 is an uncured method in which a decorative ink in an uncured state (or semi-cured state) is formed by supplying decorative ink into a mold having one or a plurality of concave portions. The decorative layer forming step (step S15), the uncured decorative layer / adherent layer stacking step (step S31) for stacking the adherend on the uncured decorative layer, and the uncured decorative layer through the adherend An electron beam irradiation step (step S41) for irradiating an electron beam toward the substrate to cure the uncured decorative layer, a mold separation step (step S51) for separating the mold from the adherend with the decorative layer, including.

  FIG. 10 shows the situation in each step of the method for manufacturing a decorative member according to Reference Example 2 in a longitudinal sectional view of the decorative member.

  As shown in FIG. 10 (10A), a mold 12 having one or more recesses 12a is prepared prior to the production of the decorative member.

Step S15 (uncured decorative layer forming step)
Next, as shown in FIG. 10 (10B), the uncured decorative layer 2a is formed by supplying electron beam curable ink for decoration into the mold 12 so as to fill the recess 12a. The decorative ink is the same as in Reference Example 1. In this step, the uncured decorative layer 2a is in a state before being cured. By using the mold 12, it becomes easy to form the uncured decorative layer 2a having a large thickness (for example, 100 μm or more).

Step S31 (uncured decorative layer / adherent lamination step)
Subsequent to step S15, as shown in FIG. 10 (10C), the adherend 4 is laminated on the uncured decorative layer 2a. In this example, the adherend 4 is a thin film made of a silicone elastomer. Next, preferably, the adherend 4 is pressed from above the adherend 4 with the roller 13 to bring the adherend 4 and the uncured decorative layer 2a into close contact with each other. In addition to pressurization using the roller 13, vacuum degassing may be performed concurrently. In addition, it is not essential to perform the above-mentioned pressurization and decompression deaeration.

Step S41 (electron beam irradiation process)
Subsequent to step S31, as shown in FIG. 10 (10D), an electron beam is irradiated from the adherend 4 side toward the uncured decorative layer 2a side. As a result, the uncured decorative layer 2 a is cured and becomes the decorative layer 2.

Step S51 (mold separation process)
Following step S41, as shown in FIG. 10 (10E), when the mold 12 is separated from the adherend 4 with the decorating layer 2, the decorating state in which the decorating layer 2 is adhered to the adherend 4 is provided. The member 10 is completed.

(Other embodiments)
As described above, preferred embodiments, modifications, and reference examples of the method for manufacturing a decorative member of the present invention have been described. However, the present invention is not limited to the above examples, and various modifications may be made. It can be implemented.

  For example, in the decorative layer forming step, a transparent clear layer may be formed using a transparent ink that does not contain a pigment or a dye. In that case, the clear layer has a function as a protective layer (may be referred to as a scratch-proof layer) for protecting the surface of the decorative member 10. Further, the adhesive ink and / or the second adhesive ink is desirably transparent, but may be translucent or opaque ink. When the second decorative layer 6 is formed with decorative ink (= second decorative ink), the second decorative ink may be either transparent or opaque ink. All of the decorative ink, the second decorative ink, the adhesive ink, and the second adhesive ink may be used as a silicone ink containing a curable silicone composition or a urethane ink containing a curable urethane composition. good. Further, some of the decorative ink, the second decorative ink, the adhesive ink, and the second adhesive ink may be a silicone-based ink or a urethane-based ink.

  In the electron beam irradiation step in each embodiment, the uncured adhesive layer 3a is irradiated through the sheet 1, but the uncured adhesive layer 3a may be irradiated from the adherend 4 side. In addition, as long as the uncured adhesive layer 3a and the uncured decorative layer can be cured by electron beam irradiation, the electron beam may be irradiated from any direction.

  Next, examples of the present invention will be described. However, the present invention is not limited to the following examples.

1. Manufacturing conditions (Example 1)
In Example 1, a decorative member having the same form as that of the first embodiment was manufactured by the following procedure.

  Decoration (picture and pattern) printing using a silicone-based ink (trade name: SILMARK) manufactured by Shin-Etsu Chemical Co., Ltd. on one side of a transfer film (trade name: Panapeel) manufactured by Panasonic Corporation, and 150 ° C. × 10 Multi-color printing was performed while alternately drying for minutes. The thickness formed by multicolor printing was about 50 μm. Next, printing was performed using a transparent silicone-based ink (trade name: SILMARK clear) manufactured by Shin-Etsu Chemical Co., Ltd. as an adhesive ink, and the steps of the decorative layer by multicolor printing were filled. The thickness of the uncured adhesive layer formed by the adhesive ink was about 100 μm. The uncured adhesive layer side of the decorative transfer sheet thus obtained was bonded to one side of the adherend made of silicone rubber. Subsequently, an electron beam was irradiated from the transfer film side to cure the uncured adhesive layer (including the curable silicone composition). An EB apparatus manufactured by Iwasaki Electric Co., Ltd. was used for electron beam irradiation.

The absorbed dose (kGy) was calculated from the following equation.
D (dose kGy) = K (equipment-specific constant) × I (beam current mA) / V (processing speed m / min)

  The electron beam irradiation conditions in Example 1 were a beam current (6.9 mA) and a processing speed (5 m / min) in order to set an irradiation dose of 100 kGy at an acceleration voltage (250 kv). Since the adhesive ink used in Example 1 was cured at an absorbed dose of 100 kGy, it was irradiated at 100 kGy to cure the uncured adhesive layer. Finally, the transfer film was peeled off from the adherend to obtain a decorative member having the decorative layer transferred to the adherend.

(Example 2)
In Example 2, the decoration member which has the form similar to the form shown in FIG. 4 of the above-mentioned 2nd Embodiment was manufactured in the following procedures.

  After performing clear printing using a silicone-based ink (trade name: SILMARK clear) manufactured by Shin-Etsu Chemical Co., Ltd. on a plurality of portions in one side region of the same transfer film as in Example 1, 150 ° C. × 10 minutes Drying was performed. The thickness of the clear print layer was about 10 μm. Next, a corona treatment was performed on the clear printing layer. Subsequently, after printing using a urethane-based ink (trade name: Seiko Advance SG410 Clear) manufactured by Seiko Advance Co., Ltd., the surface after the corona treatment was dried at 80 ° C. for 10 minutes. Next, a foil made by Murata Gold Leaf Co., Ltd. (trade name: KP24-00) was transferred to the printing surface. Next, printing was performed using a transparent silicone-based ink (trade name: SILMARK clear) manufactured by Shin-Etsu Chemical Co., Ltd. as a bonding ink to fill the steps on the transfer film. The thickness of the uncured adhesive layer formed by the adhesive ink was about 100 μm. Then, the decoration member was obtained through the process similar to Example 1. FIG.

(Example 3)
In Example 3, a decorative member having the same form as that of the above-described third embodiment was manufactured by the following procedure.

  After performing clear printing using a silicone-based ink (trade name: SILMARK clear) manufactured by Shin-Etsu Chemical Co., Ltd. on most of the area on one side of the same transfer film as in Example 1, 150 ° C. × 10 minutes Drying was performed. Thereafter, a foil (trade name: KP24-00) made of Murata Gold Leaf Co., Ltd. was transferred through the same steps as in Example 2. Next, processing was performed while irradiating a laser beam on the foil to form a character design. After the laser processing of the foil, printing was performed using a transparent silicone-based ink (trade name: SILMARK clear) manufactured by Shin-Etsu Chemical Co., Ltd. as an adhesive ink to fill the steps on the transfer film. The thickness of the uncured adhesive layer formed by the adhesive ink was about 100 μm. Then, the decoration member was obtained through the process similar to Example 1. FIG.

Example 4
In Example 4, the decorating member which has the form similar to the form shown in FIG. 5 of the above-mentioned 2nd Embodiment was manufactured in the following procedures.

  After performing clear printing using a silicone-based ink (trade name: SILMARK clear) manufactured by Shin-Etsu Chemical Co., Ltd. on most of the area on one side of the same transfer film as in Example 1, 150 ° C. × 10 minutes Drying was performed. Next, a corona treatment was performed on the clear printing layer. Subsequently, after printing using a urethane-based ink (trade name: Seiko Advance SG410 Clear) manufactured by Seiko Advance Co., Ltd., the surface after the corona treatment was dried at 80 ° C. for 10 minutes. Next, the design was printed on the printing surface of urethane type ink using the Roland DG inkjet printer (brand name: VS640). The printed surface was thermally dried at 60 ° C. for 5 minutes. Next, printing was performed using a transparent silicone-based ink (trade name: SILMARK clear) manufactured by Shin-Etsu Chemical Co., Ltd. as a bonding ink to fill the steps on the transfer film. The thickness of the uncured adhesive layer formed by the adhesive ink was about 100 μm. Then, the decoration member was obtained through the process similar to Example 1. FIG.

(Comparative Example 1)
In Comparative Example 1, the same process as in Example 1 was performed, and when the adhesive ink was cured, heat drying (150 ° C. × 10 minutes per color) was performed instead of electron beam irradiation. The other conditions were the same as in Example 1 to obtain a decorative member.

(Comparative Example 2)
In Comparative Example 2, the same process as in Example 2 was performed, and when the adhesive ink was cured, heat drying (150 ° C. × 10 minutes) was performed instead of electron beam irradiation. The other conditions were the same as in Example 2 to obtain a decorative member.

(Comparative Example 3)
In Comparative Example 3, the same process as in Example 4 was performed, and when the adhesive ink was cured, heat drying (150 ° C. × 10 minutes) was performed instead of electron beam irradiation. The other conditions were the same as in Example 4 to obtain a decorative member.

2. Evaluation Results In the case of the decorative members obtained in Examples 1 to 4, the printed layer was cured by electron beam irradiation at room temperature (about 20 ° C.) in 1 second or less. On the other hand, in the case of the decorative members of Comparative Examples 1 to 3, curing of the printed layer by thermosetting required 10 minutes at about 150 ° C. In addition, the decoration member obtained by electron beam irradiation was able to realize highly accurate decoration with almost no blurring or breakage of the pattern or the like compared to that obtained by thermosetting. From these results, it was found that the method for producing a decorative member through curing of the adhesive layer by electron beam irradiation is excellent in both production speed and decoration quality.

  The present invention can be used for the production of a decorative member, for example, for decoration on a resin or rubber.

DESCRIPTION OF SYMBOLS 1 ... Sheet, 2 ... Decorating layer, 3a ... Uncured adhesive layer, 4 ... Substrate, 5 ... Second adhesive layer, 6 ... Second decorating layer ( (Including foil), 10 ... decorative member.

Claims (8)

A decorative layer forming step of supplying a decorative ink to the surface of the sheet to form a semi-cured or cured decorative layer;
An uncured adhesive layer forming step of forming an uncured adhesive layer by supplying an electron beam curable adhesive ink above the decorative layer;
A sheet / adherent lamination step of laminating the uncured adhesive layer side of the sheet on an adherend;
An electron beam irradiation step of irradiating the electron beam to cure the uncured adhesive layer;
A sheet peeling step for peeling the sheet from the adherend,
The manufacturing method of the decorating member containing this.   A second adhesive layer forming step of forming a second adhesive layer by supplying a second adhesive ink on the decorative layer; and a second decorative layer in a semi-cured or cured state on the second adhesive layer The manufacturing method of the decorating member of Claim 1 which further includes the 2nd decorating layer formation process which forms.   The method for producing a decorative member according to claim 2, wherein the second decorative layer is a decorative foil.   The method for producing a decorative member according to claim 2 or 3, wherein the second adhesive ink contains a curable silicone composition.   The manufacturing method of the decorating member of any one of Claim 1 to 4 in which the said ink for decorating contains a curable silicone composition.   The method for manufacturing a decorative member according to any one of claims 1 to 5, wherein the adhesive ink contains a curable silicone composition.   The method for manufacturing a decorative member according to any one of claims 1 to 6, wherein the adherend is a silicone elastomer.   In the sheet and adherend stacking step, the sheet and the layer formed on the surface thereof are bent or cut according to the surface shape of the adherend, and the uncured adhesive layer side of the sheet is attached. The manufacturing method of the decorating member of any one of Claims 1-7 laminated | stacked on a body.