JP6717655B2 - Article with decorative layer - Google Patents

Description

The present invention relates to an article having a decorative layer formed on its surface.

For example, various patterns are formed as a decorative layer on the surface of the fishing rod. In particular, when a pattern is formed with UV ink, a pattern having a three-dimensional effect can be obtained, which gives a high-class feeling. However, the UV ink has a problem that it is easily peeled off.

JP, 2005-47103, A

Therefore, the present invention has been made in view of the above conventional problems, and an object thereof is to prevent peeling of a layer using UV ink.

The present invention has been made to solve the above problems, and an article having a decorative layer according to the present invention is an article having a decorative layer formed on the surface thereof, and the decorative layer is composed of a first ink. A first printed layer and a second printed layer composed of a second ink laminated on the first printed layer, the first ink containing a blocked isocyanate, the second ink Is UV ink.

In the article having the decorative layer having the above structure, the second printing layer is laminated on the first printing layer. The second ink forming the second print layer is UV ink, and the UV ink is irradiated with ultraviolet rays to generate radicals and cure. At that time, the blocked isocyanate of the first ink undergoes a radical reaction at the boundary (interface) between the first printed layer and the second printed layer. That is, the blocked isocyanate of the first ink and the photopolymerizable oligomer or monomer of the UV ink, which is the second ink, form a covalent bond. The covalent bond firmly adheres the first print layer and the second print layer.

In particular, it is preferable that the decorative layer includes an undercoat layer, and the first printing layer is laminated on the undercoat layer. Since the first printed layer can be formed on the surface of the article through the undercoat layer, the first printed layer can be formed without unevenness, and the second printed layer formed thereon can be formed neatly. Further, the hydrogen bond between the undercoat layer and the first printing layer enhances the adhesion between the two layers.

Further, the second ink is preferably a UV ink in which the first ink is mixed, and the adhesion between the first printing layer and the second printing layer is further enhanced.

Further, the first printed layer constitutes the first pattern, and the second printed layer differs from the first pattern and constitutes the second pattern formed in the formation region of the first pattern. Preferably. Since the first printed layer and the second printed layer have different patterns, high decorativeness can be obtained. Then, since the second pattern formed by the second print layer is formed within the formation range of the first pattern formed by the first print layer, the second pattern formed by the second print layer is separated from the outer edge portion. Hard to do.

As described above, since a covalent bond due to a radical reaction is formed at the boundary between the first print layer made of the ink containing blocked isocyanate and the second print layer made of UV ink, the first print layer made of UV ink is formed. The peeling of the second printed layer is prevented.

Sectional drawing of the principal part of the article which has the decoration layer in one Embodiment of this invention. The principal part top view of the same decoration layer. Sectional drawing of the principal part of the article which has the decoration layer in other embodiment of this invention.

Hereinafter, an article having a decorative layer according to an embodiment of the present invention will be described with reference to the drawings. The article in the present embodiment is an article body 1 on which a decorative layer is formed. Such an article may be an article used for various purposes and is suitable as a fishing tackle or a bicycle part. For example, the fishing tackle can be applied to a reel component, a rod main body of a fishing rod, a reel seat, a guide frame of a fishing line guide, and the like. The material of the surface of the article is not particularly limited, but for example, it is suitable as a decoration for a resin molded product by injection molding, as a decoration for a molded product made of fiber reinforced resin, and a short fiber having a length of 1 mm or less It is suitable for decoration of mixed synthetic resin moldings.

<Cross section structure>
FIG. 1 shows a sectional view of a main part of an article having a decorative layer according to this embodiment. The decorative layer is formed on the undercoat layer 2 formed on the surface of the article body 1, the first printing layer 3 formed on the undercoat layer 2, and the first printing layer 3. And a second printed layer 4. As shown by the chain double-dashed line in FIG. 1, it is preferable that the top coat layer 5 covering the decorative layer is formed as a protective layer. The top coat layer 5 is made of a transparent or semitransparent synthetic resin such as epoxy, urethane, acrylic, and acrylic silicon. The top coat layer 5 is preferably formed so as to cover the entire decoration layer. In addition, each layer may be a single layer or a multi-layer including two or more layers.

<Undercoat layer 2>
The undercoat layer 2 is made of a base paint and may be colored or colorless, and may be transparent or opaque. The undercoat layer 2 is made of various paints and may be acrylic urethane, acrylic melamine, epoxy-based, ester-based, or the like.

<First printing layer 3>
The first printed layer 3 constitutes a first pattern. The first pattern may be various designs or characters. As shown in FIG. 2, the formation area of the first print layer 3 is within the formation area of the undercoat layer 2, and thus the formation area of the first print layer 3 has a smaller area than the formation area of the undercoat layer 2. Therefore, the first printing layer 3 is formed on the undercoat layer 2 as an underlayer. The first printing layer 3 may be provided at one place or may be provided at a plurality of places.

The 1st printing layer 3 consists of a 1st ink. The first ink is an inkjet ink, in particular, and can be formed by an inkjet printing apparatus. The first ink contains a main agent and a curing agent. The main agent is a compound having active hydrogen, and the curing agent is an isocyanate compound. The first ink is a one-component type rather than a two-component type, that is, a block type and has a blocked isocyanate in which isocyanate is masked with a blocking agent. When the blocked isocyanate is heated, the blocking agent dissociates to regenerate the isocyanate group. The blocking agent may be dissociated by light instead of heat.

The ink-jet ink may be a one-component polyurethane resin paint composed of blocked isocyanate and polyol. The blocked isocyanate is obtained by reacting various isocyanate compounds with various blocking agents. The isocyanate compound which is a raw material used for the blocked isocyanate may be various ones, for example, diphenylmethane diisocyanate (MDI), methyl isocyanate (MIC), hexamethylene diisocyanate (HDI), toluene diisocyanate (TDI), isophorone diisocyanate. (IPDI) or the like.

The blocking agent may be various ones, such as alcohols, ε-caprolactam, phenols, oximes, active methylene compounds and the like. Further, the polyol may be various ones, for example, acrylic polyol, polyester polyol, polycarbonate polyol and the like.

The first ink contains a solvent, a dye, a pigment, and a dispersant. Further, in addition to the blocked isocyanate, various isocyanates which are not masked with a blocking agent may be contained. However, when the unmasked isocyanate is contained, the amount of the isocyanate is smaller than that of the blocked isocyanate.

<Second print layer 4>
The second printed layer 4 constitutes a second pattern. The second pattern may be various designs or characters. The second pattern may be the same as the first pattern, but they are different from each other in this embodiment. The formation area of the second print layer 4 is within the formation area of the first print layer 3, and thus the formation area of the second print layer 4 is smaller than the formation area of the first print layer 3. .. The second print layer 4 may be provided at one place or at a plurality of places. Only one second printing layer 4 may be formed on one first printing layer 3, or two or more second printing layers 4 may be formed. The formation area of the second print layer 4 and the formation area of the first print layer 3 may be the same. That is, the outer edge of the second print layer 4 may be flush with the outer edge of the first print layer 3. In any case, it is preferable that the second printed layer 4 is formed so as not to extend outside from the outer edge portion of the first printed layer 3, but it may be extended.

The second print layer 4 is composed of a second ink different from the first ink. The second ink is a UV ink, and the UV ink is an ink that is cured and fixed by being irradiated with ultraviolet rays and has excellent fast-curing properties. The second ink is also preferably an inkjet ink, and the second printing layer 4 can be formed by an inkjet printing device like the first printing layer 3. The UV ink may be a photopolymerization type and contains a resin that is cured by ultraviolet rays. The ultraviolet curable resin may be various radical polymerization resins, and various oligomers and monomers. Examples of the oligomer include epoxy acrylate, urethane acrylate, and polyether acrylate. Various kinds of photopolymerization initiators may be used, and examples thereof include benzophenone-based, benzoin-based, acetophenone-based, thioxanthone-based, acylphosphine oxide-based and the like. The UV ink contains a pigment, a defoaming agent, etc. in addition to the photopolymerizable oligomer and the photopolymerization initiator.

<Manufacturing process>
For example, a process of forming the decorative layer having the above-described configuration on the fishing rod main body will be described. A prepreg is wound around a mandrel and heated and baked to form a rod main body, and then the rod main body removed from the mandrel is held by a rod holder and a base paint is applied to the surface thereof. After application, the rod body is removed from the rod holder and heated at 80 to 100° C. for 20 to 30 minutes to form the undercoat layer 2 on the surface of the rod body. The undercoat layer 2 can be formed on the entire rod body. After that, the rod main body is mounted on the rod holder, and the first ink is applied to the rod main body by the inkjet printing device to form the first printing layer 3 on the undercoat layer 2. After that, without removing the rod body from the rod holder, the second ink consisting of UV ink is continuously applied on the first printing layer 3 by an inkjet printing device, and the applied second ink is irradiated with ultraviolet rays. The second printed layer 4 is formed by curing. By irradiating the second ink immediately after the application of the second ink, the second ink can be prevented from spreading and the second pattern can be accurately formed. Then, the rod body is removed from the rod holder and heated at a high temperature of 100° C. or higher for 20 to 30 minutes. The top coat layer 5 may be formed thereafter.

An example will be described in more detail. Urethane paint is used as the base paint of the undercoat layer 2. When the undercoat layer 2 is made of urethane paint, it has a urethane bond and can be represented by the following general formula.

The first ink uses a blocked isocyanate containing ε-caprolactam as a blocking agent, and a non-blocked isocyanate (R ₃ —NCO) in addition to the polyol (R ₄ —OH). A blocked isocyanate having ε-caprolactam as a blocking agent is represented by the following general formula.

The UV ink that is the second ink contains a UV curable resin represented by the following general formula.

When irradiated with ultraviolet rays, the photopolymerization initiator is cleaved to generate radicals, radical polymerization is initiated, and the second ink is cured. At that time, the UV curable resin is converted to radicals and activated as shown by the following general formula.

When irradiated with ultraviolet rays, unreacted blocked isocyanate in the first ink and activated UV in the second ink are present at the boundary between the first printing layer 3 and the second printing layer 4. Radical reaction with the cured resin forms a covalent bond represented by the following general formula.

Then, by heating as described above, the blocking agent dissociates in the blocked isocyanate in the first ink to regenerate the isocyanate, and the regenerated isocyanate reacts with the polyol in the first ink to give the first One ink hardens. The blocked isocyanate that has undergone a radical reaction as described above does not react by this heating and the blocking agent does not dissociate. Therefore, even if heating is performed after UV irradiation, the covalent bond at the boundary portion between the first printing layer 3 and the second printing layer 4 is maintained. At the boundary between the undercoat layer 2 and the first printing layer 3, hydrogen bonds are formed as in the following general formula.

As described above, in the rod body having the decorative layer formed on the surface, the first print layer 3 is laminated on the undercoat layer 2 to form the first pattern. The first pattern formed by the printing layer 3 is uniformly formed, and the second pattern formed by the second printing layer 4 formed thereon is also formed neatly. Further, since the second pattern is formed by the UV ink, decoration with a three-dimensional effect is obtained, and the fishing rod has a high-class feeling.

In particular, since the first pattern formed by the first printing layer 3 and the second pattern formed by the second printing layer 4 formed thereon are different from each other, high decorativeness can be obtained.

At the boundary between the first print layer 3 and the second print layer 4, a covalent bond is formed by radical reaction, so that the first print layer 3 and the second print layer 4 adhere to each other. The property is high, and peeling of the second printing layer 4 made of UV ink is prevented. Therefore, the three-dimensional decoration of the UV ink is maintained without peeling. In particular, since the second pattern formed by the second print layer 4 is formed within the formation range of the first pattern formed by the first print layer 3, the second pattern formed by the second print layer 4 has its outer edge. It becomes difficult to peel from the part. Further, since a hydrogen bond is formed between the undercoat layer 2 and the first printing layer 3, the adhesion between both layers is high.

The UV ink may be mixed with a predetermined amount of the first ink. That is, a mixture of UV ink and a predetermined amount of the first ink may be used as the second ink. When the UV ink is mixed with the predetermined amount (for example, several% to 20%) of the first ink, the covalent bond at the boundary between the first printing layer 3 and the second printing layer 4 is formed more reliably. As a result, the adhesion between the first printing layer 3 and the second printing layer 4 can be further enhanced.

Further, in the above-described embodiment, the second pattern formed by the second print layer 4 has a smaller area than the first pattern so as not to extend outside the first pattern formed by the first print layer 3. However, the present invention is not limited to this. For example, as shown in FIG. 3, the outer edge portion of the second pattern formed by the second print layer 4 is partially or entirely formed with the outer edge portion of the first pattern formed by the first print layer 3. May be the same in a plan view. When the outer edge portion of the second pattern formed by the second print layer 4 and the outer edge portion of the first pattern formed by the first print layer 3 are wholly in agreement, the second pattern and the first pattern The area of the pattern is the same, and thus the second pattern is the same as the first pattern, but it may be that the second printing layer 4 is within the formation range of the first printing layer 3. If so, peeling at the outer edge of the second print layer 4 can be prevented. However, the outer edge portion of the second printed layer 4 may be partially or wholly outwardly protruded from the outer edge portion of the first printed layer 3.

1 Article Body 2 Undercoat Layer 3 First Printing Layer 4 Second Printing Layer 5 Topcoat Layer

Claims (3)

An article having a decorative layer formed on its surface,
The decorative layer comprises a first printing layer made of the first ink and a second printing layer made of the second ink laminated on the first printing layer,
The first ink comprises a blocked isocyanate, the second ink is a UV ink,
In the boundary portion between the first printing layer and the second printing layer, a covalent bond is formed by radical reaction between the blocked isocyanate of the first ink and the UV curable resin of the second ink,
An article having a decorative layer , wherein the formation area of the second print layer is smaller than the formation area of the first print layer . The decorative layer comprises an undercoat layer, the first printing layer is laminated on the undercoat layer, and the formation area of the first printing layer is smaller than the formation area of the undercoat layer. An article having the decorative layer of. An article having a decorative layer according to claim 1 or 2, which comprises a top coat layer that covers the entire decorative layer.

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