JP7167605B2 - HYDRAULIC TRANSFER FILM, DECORATED MOLDED PRODUCT MANUFACTURING METHOD, AND DECORATIVE MOLDED PRODUCT - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hydraulic transfer film suitable for forming a design layer on the surface of a molded article having a three-dimensional surface or a curved surface mainly due to unevenness, a method for producing a decorated molded article, and a decorated molded article.

2. Description of the Related Art Molded articles having a surface decorated with wood grain, metal tone (metallic luster), etc. are used for interior parts of automobiles, home electric appliances, office automation equipment, and the like. Many of these molded articles have complicated three-dimensional shapes, and conventionally, studies have been made on a method for simply decorating a molded article having a complicated shape with a high degree of designability.
As such a decoration method, a hydraulic transfer method using water pressure is known. In this hydraulic transfer method, first, a transfer film is prepared by printing a desired decorative layer on a water-soluble or water-swellable base film, and an activator containing an organic solvent as a main component is applied to the decorative layer of the transfer film. is applied to swell and tackify the decorative layer (this is called activation). Before or after that, the transfer film is floated on the surface of water with the surface of the decoration layer for transfer facing up, and then an article to be a transfer target is pressed on the transfer film, and the transfer film is transferred by water pressure. It is brought into close contact with the transfer-receiving surface of the body to be decorated. After that, the base film is removed and the decorative layer is transferred (see Patent Documents 1 and 2, for example).

JP-A-61-66685 JP-A-60-165300

In the conventional technology, when producing a product having a pattern in which a part of the pattern is removed (hereinafter referred to as a "pattern"), a plate in which the design of the relevant part is removed is used so as to achieve the desired design. Therefore, it was necessary to create a printed film with the same design as the decorative processed product.
In the case of a pattern using multiple colors such as a wood grain pattern, the pattern layers are superimposed to express the design. However, when the part to be punched is fine, even if the deviation of each pattern layer is slight, the pattern layer of the shifted part can be seen from the part where the pattern layer is removed. was difficult.

Therefore, an object of the present invention is to provide a hydraulic transfer film that can transfer a design having a high-definition pattern to a molded product, a method for manufacturing a decorative molded product using the hydraulic transfer film, and a decorated molded product. .

As a result of intensive studies to solve the above problems, the present inventors found that the problems can be solved by providing a water-soluble ink layer on the hydraulic transfer film, and completed the present invention through further studies.
That is, the present invention is as follows.

[1] A hydraulic transfer film having a water-soluble film, a pattern layer, and a water-soluble ink layer in this order, and having the water-soluble ink layer on a portion of the pattern layer.
[2] A method for manufacturing a decorative molded product, comprising the following steps (A) to (D) in order.
Step (A): A step of floating the hydraulic transfer film on the water surface so that the water-soluble film side faces the water surface side.
Step (B): A step of applying an activator composition to the water-soluble ink layer side of the hydraulic transfer film.
Step (C): A step of pressing a material to be transferred onto the hydraulic transfer film that has undergone steps (A) and (B) and bringing the water-soluble ink layer side into close contact with the surface of the material to be transferred by water pressure.
Step (D): removing together the water-soluble film, the water-soluble ink layer, and the design layer present on the water-soluble ink layer, which are in close contact with the transfer surface of the transfer-receiving material.
[3] A decorative molded article having a pattern layer on a part of a molded base material,
In a plan view, there is a boundary where the pattern portion where the molded body base material is exposed and the pattern portion of the pattern layer are adjacent to each other, and the pattern portion of the pattern layer is composed of two or more regions with different colors, 2 A decorative molded product in which the above regions are aligned along the boundary.

ADVANTAGE OF THE INVENTION According to this invention, the hydraulic transfer film which can transfer the design which has a high-definition pattern to a molded article, the manufacturing method of the decorative molded article using this hydraulic transfer film, and a decorated molded article can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional drawing which shows one aspect|mode of the hydraulic transfer film of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional drawing which shows one aspect|mode of the decorative molding of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional drawing which shows one aspect|mode of the hydraulic transfer film of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional drawing which shows one aspect|mode of the decorative molding of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram in the planar view which shows one aspect|mode of the decorative molding of this invention. It is a schematic sectional view showing one mode of a conventional hydraulic transfer film.

<Hydraulic transfer film>
In the prior art, in order to obtain a decorative molded product having a pattern, it was necessary to prepare a printed film having a pattern similar to that to be expressed on the decorative molded product.
It is relatively easy to apply a stripped pattern to a monochromatic pattern with a clear presence or absence of the pattern (for example, a checkered pattern). However, a pattern such as wood grain is a pattern expressed by layering multiple colors, and in order to express a stripped pattern on this, it was necessary to overlap the patterns of each color without misalignment while assuming the stripped pattern part. .
Specifically, as shown in FIG. 6, which is a schematic cross-sectional view showing one aspect of a conventional hydraulic transfer film, when forming a pattern layer (a) in which multiple colors having a pattern (b) are laminated, printing Due to accuracy reasons, misregistration is likely to occur at the position (c) of the punched pattern. Since such misregistration impairs design, it is not easy to achieve mass production stability by superimposing patterns without misalignment.
In addition, since the occurrence of misregistration is unavoidable, there is no choice but to employ patterns of each color that do not cause discomfort even if the misregistration occurs to some extent, which limits the design. In particular, when an attempt is made to express a stripped pattern with a geometric pattern having periodicity, the deviation is conspicuous and the design property is likely to be impaired.
Further, even if the pattern of the pattern layer on the side to be punched is the same, if the pattern to be punched is different, it is necessary to prepare a plate of each pattern accordingly. In this case, it is possible to obtain a design in which the pattern is expressed by masking the material to be transferred with tape or the like. mass production is low.

In contrast to the conventional method of obtaining a decorative molded product having the above-mentioned pattern, the present inventor focused on using a hydraulic transfer film on which a pattern is printed using a water-soluble ink. That is, the hydraulic transfer film of the present invention is characterized by having a water-soluble film, a pattern layer, and a water-soluble ink layer in this order, and having the water-soluble ink layer on part of the pattern layer.
After the water pressure transfer film is transferred to the transferred material, water permeates the water-soluble ink layer and dissolves the water-soluble ink in the step of washing away the water-soluble film from the transferred material. Then, the water-soluble ink layer is peeled off from the transfer-receiving body together with the pattern layer formed on the water-soluble ink layer when viewed from the transfer-receiving body after the transfer. By this method of obtaining a decorative molded product, a part of the pattern layer becomes a stripped pattern and is flushed with water together with the water-soluble ink layer. It becomes possible to express it in the molded product.
In addition, since the water pressure transfer film has a water-soluble ink layer on a part of the pattern layer, it can be applied regardless of the patterns of the pattern layer and the water-soluble ink layer, the layer structure of the pattern layer, and multiple colors. Good stability. Furthermore, by changing the pattern represented by the water-soluble ink layer, different designs can be easily expressed even if the printed film with the same pattern layer is used, so that the transferred product can be efficiently obtained.

[Water-soluble film]
The water-soluble film in the present invention is not particularly limited as long as it is water-soluble or water-swellable, and can be appropriately selected and used from films generally used as conventional hydraulic transfer films. can.
Examples of resins constituting the water-soluble film include polyvinyl alcohol resin, dextrin, gelatin, glue, casein, shellac, gum arabic, starch, protein, polyacrylic acid amide, sodium polyacrylate, polyvinyl methyl ether, methyl vinyl ether and anhydrous. Examples include various water-soluble resins such as copolymers with maleic acid, copolymers with vinyl acetate and itaconic acid, polyvinylpyrrolidone, acetylcellulose, acetylbutylcellulose, carboxymethylcellulose, methylcellulose, hydroxyethylcellulose, and sodium alginate.
These resins may be used alone, or two or more of them may be mixed and used. The water-soluble film may contain rubber components such as mannan, xanthan gum and guar gum.

Among these, a polyvinyl alcohol (PVA) resin film is particularly preferable because it has good film-forming stability, stable swelling and solubility in water, and versatility. In addition to PVA, the polyvinyl alcohol resin film may contain additives such as starch and rubber.
Polyvinyl alcohol resin film is necessary when forming a pattern layer for transfer on a water-soluble film by changing the degree of polymerization, the degree of saponification of polyvinyl alcohol, and the blending amount of additives such as starch and rubber. Mechanical strength, moisture resistance during handling, speed of softening due to water absorption after floating on the water surface, time required for spreading or diffusion in water, ease of deformation in the transfer process, etc. can be adjusted as appropriate. can.

A suitable water-soluble film made of a polyvinyl alcohol resin film is the one described in JP-A-54-92406. , 5% by mass of starch, and an equilibrium moisture content of about 3%.
In addition, although the polyvinyl alcohol resin film is water-soluble, it is preferable that the film remains as a film while swelling and softening in water before being dissolved in water. This is because, by performing the hydraulic transfer while the film is still in a state of existence, it is possible to prevent excessive flow and deformation of the pattern layer for transfer during the hydraulic transfer.

The thickness of the water-soluble film is preferably 10-100 μm. When the thickness is 10 μm or more, the uniformity of the film is good and the production stability is high. On the other hand, when it is 100 μm or less, the solubility in water is moderate and the printability is excellent. From the above point of view, the thickness of the water-soluble film is more preferably 20-60 μm, still more preferably 30-50 μm.

The above water-soluble film can also be used by being laminated with a water-permeable substrate (hereinafter referred to as "water-permeable substrate") such as paper, nonwoven fabric, cloth, etc. In this case, The water-permeable substrate is separated from the water-soluble film before the hydraulic transfer film is floated on the water surface, or the water-permeable substrate is separated by the action of water after floating on the water surface. is preferred.

[Pattern layer]
The pattern layer may be printed on the entire surface, may be printed partially in a pattern, or may be a combination of these layers.
From the viewpoint that the effect of the present invention can be exhibited more effectively, the pattern layer is preferably composed of two or more layers, and at least one of the two or more layers is preferably a partially printed layer. From the same viewpoint as above, the pattern layer is preferably formed with two or more colors.
For example, as shown in FIG. 1 as a preferred embodiment of the hydraulic transfer film, the pattern layer 2 can be formed of two or more partially printed layers with different patterns and two or more colors.

In the hydraulic transfer film of the present invention, a water-soluble ink layer is formed on part of the pattern layer, and after the hydraulic transfer film is transferred to the transfer target, the pattern layer present on the water-soluble ink layer is , is removed together with the water-soluble ink layer. At this time, the pattern layer formed on the portion other than the upper portion of the water-soluble ink layer stays on the decorative molded product to form a pattern design.
From the above, the pattern layer existing above the water-soluble ink layer is removed together with the water-soluble ink layer, and the pattern layer existing other than the upper part of the water-soluble ink layer can remain on the decorative molded product. is not particularly limited, and can usually contain a binder resin and a colorant.

Binder resins include thermoplastic resins, and specific examples include acrylic resins, polyester resins such as alkyds, unsaturated polyester resins, urethane resins (e.g., polyester urethane resins), polycarbonate resins, vinyl chloride-vinyl acetate Examples include, but are not limited to, polymers, polyvinyl acetals (butyral resins) such as polyvinyl butyral, and nitrocellulose resins such as nitrocellulose.
One type of the binder resin may be used alone, or two or more types may be used in combination.

Colorants include inorganic pigments such as carbon black (ink), iron black, titanium white, antimony white, yellow lead, titanium yellow, red iron oxide, cadmium red, ultramarine, cobalt blue, quinacridone red, isoindolinone yellow, and phthalocyanine. Organic pigments or dyes such as blue, metallic pigments consisting of scale-like foils such as aluminum and brass, and pearlescent (pearl) pigments consisting of scale-like foils such as titanium dioxide-coated mica and basic lead carbonate are used.
The solvent used for forming the pattern layer is not particularly limited, and may be aliphatic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, alcohols, polyhydric alcohols, ketones, ethers, esters, Nitrohydrocarbons, nitriles, amines, acetals, acids, furans, and the like.
One of the above solvents may be used alone, or two or more thereof may be used in combination.

The thickness of the pattern layer is usually about 0.1 to 10 μm. The thickness of the pattern layer is preferably 0.3 μm or more, more preferably 0.3 μm or more, more preferably 0.3 μm or more, from the viewpoint that the pattern layer formed other than the upper part of the water-soluble ink layer as described above is suitable for staying on the decorative molded product. .5 μm or more. In addition, the thickness of the design layer is preferably 5 μm or less, more preferably 2 μm or less, from the viewpoints that water easily permeates into the water-soluble ink layer and that the pattern layer is easily peeled off from the transferred material together with the water-soluble ink layer.

The pattern of the pattern layer may be appropriately determined so that a desired design can be obtained from the combination with the missing pattern formed by the water-soluble ink layer, which will be described later.
Examples of the pattern include those imitating natural patterns such as wood grain patterns, stone grain patterns, texture patterns, and grain patterns; geometric patterns such as circles, squares, polygons, honeycombs, stripes, and carbon; An abstract pattern etc. are mentioned. Among these patterns, the wood grain pattern and the stone grain pattern are preferable from the viewpoint of more exhibiting the effect of the present invention.

[Water-soluble ink layer]
The water-soluble ink layer is a layer that peels off a part of the picture layer to form a stripped pattern, and is formed on a part of the picture layer.
Another layer may be provided between the water-soluble ink layer and the pattern layer as long as it does not impair the effects of the present invention. The film preferably has a water-soluble ink layer directly above part of the pattern layer.

Further, when the hydraulic transfer film is transferred to the transfer-receiving material, the water-soluble ink layer is removed together with the water-soluble film in close contact with the transfer-receiving surface after being transferred to the transfer-receiving material.
As described above, the water-soluble ink used for the water-soluble ink layer is not particularly limited as long as the water-soluble ink layer can be transferred to the transfer target and can be removed together with the water-soluble film. Mixtures of water-soluble resins and water-insoluble resins are included.
Polyvinylpyrrolidone is preferable as the water-soluble resin from the viewpoint of stably obtaining a higher-definition pattern.
When a mixture of a water-soluble resin and a water-insoluble resin is used, the content ratio thereof may be specified as appropriate while adjusting the details of removal of the pattern layer. From the standpoint of easy formation of the pattern, the content of the water-soluble resin in the mixture is preferably 3% by mass or more, more preferably 5% by mass or more.
Examples of the mixture include a combination of casein and a water-soluble acrylic resin.

In addition, the water-soluble ink layer may contain extender pigments such as silica, talc, clay, barium sulfate, barium carbonate, calcium sulfate, calcium carbonate, magnesium carbonate, etc., as long as they do not impair the effects of the present invention.

The design of the water-soluble ink layer may be appropriately determined so that the design resulting from the combination with the above-described design layer is desired.
Examples of the pattern of the water-soluble ink layer include those exemplified for the pattern layer described above. Among these patterns, a geometric pattern and a simple abstract pattern are preferable from the viewpoint that the effects of the present invention can be exhibited more effectively.

In addition, the pattern of the water-soluble ink layer is selected between a part of the pattern formed by the water-soluble ink and another part adjacent to the part, from the viewpoint of the degree of removal of the pattern layer and the formation of a finer pattern. is preferably 0.5 to 5.0 mm, more preferably 1.0 to 3.0 mm.

The thickness of the water-soluble ink layer is usually about 0.1 to 25 μm. The thickness of the water-soluble ink layer is preferably 0.3 μm or more, more preferably 0, from the viewpoint of ensuring that the pattern does not collapse when the hydraulic transfer film is floated on the water surface and that the pattern layer is reliably stripped off together with the water-soluble ink layer. .5 μm or more. From the viewpoint of preventing the pattern layer from peeling off more than necessary and transferring the water-soluble ink layer to the surface to be transferred more favorably, the thickness of the water-soluble ink layer is preferably 10 μm or less, more preferably 5 μm or less. is.

[Other layers]
The hydraulic transfer film may further have other layers on the opposite side of the water-soluble ink layer to the pattern layer from the viewpoint of enhancing the design, as long as the effects of the present invention are not impaired.
Other layers include, for example, a colored solid layer on the entire surface. As a specific example of a hydraulic transfer film having other layers, as shown in FIG. 3, it has a water-soluble film 1, a pattern layer 2, a water-soluble ink layer 3, and another layer (solid layer) 5 in order. things are mentioned.
Binder resins and coloring agents that can be used in the solid layer are the same as those exemplified for the pattern layer. Further, the thickness of the solid layer is usually about 0.3 to 10 μm, preferably 0.5 to 5 μm.
The above-mentioned other layers are formed below the water-soluble ink layer (transferred body side) when viewed from the transferred body after hydraulic transfer, so that they are not peeled off in the step (D) (removal step) described later and are decorated. Remains in the molded product. As shown in FIG. 4, the above-mentioned other layers are exposed at the cut-out portion 3' consisting of the water-soluble ink layer and the pattern layer peeled off together with the water-soluble ink layer, and the design of the decorative molded product is exposed. You can also expect to build

[Manufacturing method of hydraulic transfer film]
The hydraulic transfer film 10 shown in FIG. 1, which is one embodiment of the hydraulic transfer film of the present invention, includes, for example, a step of forming a pattern layer 2 on a water-soluble film 1 and a water-soluble ink layer 3 thereon. It can be manufactured by a process.
In the above, each layer can be formed by a known coating method or printing method. Examples of the coating method include gravure coating and reverse coating, and examples of the printing method include offset printing, inkjet printing, gravure printing and the like.
The method of forming the pattern layer is preferably gravure printing from the viewpoint of ease of water penetration.

<Manufacturing method of decorative molded product>
Using the hydraulic transfer film described above, a decorative molded product can be produced by a production method having the following steps (A) to (D) in order.
Step (A): A step of floating the aforementioned hydraulic transfer film on the water surface so that the water-soluble film side faces the water surface side.
Step (B): A step of applying an activator composition to the water-soluble ink layer side of the hydraulic transfer film.
Step (C): A step of pressing a material to be transferred onto the hydraulic transfer film that has undergone steps (A) and (B) and bringing the water-soluble ink layer side into close contact with the surface of the material to be transferred by water pressure.
Step (D): removing together the water-soluble film, the water-soluble ink layer, and the design layer present on the water-soluble ink layer, which are in close contact with the transfer surface of the transfer-receiving material.

[Step (A)]
Step (A) can be performed before or after step (B). The hydraulic transfer film is floated on the water surface so that the water-soluble film side faces the water surface side. In order to make the hydraulic transfer film float on the surface of the water, the printed material may be floated one by one, or the water is allowed to flow in one direction, and the continuous belt-like hydraulic transfer film is continuously supplied on the water surface. to float.

[Step (B)]
Step (B) can be performed before or after step (A), and is a step of applying an activator composition to the water-soluble ink layer side of the hydraulic transfer film. By applying the activator composition to the water-soluble ink layer side of the hydraulic transfer film, at least a part of the water-soluble ink layer and pattern layer dissolves or swells to soften (activate) and adhere to the transfer material. easier.
(Activator composition)
The activator composition is not particularly limited as long as it is a composition that has the function of activating the water-soluble ink layer or pattern layer and transferring it to the transfer surface of the transfer-receiving body. It preferably has properties such that it does not evaporate until each layer is transferred to the surface. Such activator compositions preferably include, for example, compositions containing esters, acetylene glycols, ethers, and resins.
Preferred esters include ethyl acetate, propyl acetate, butyl acetate, isobutyl acetate, sec-butyl acetate, tert-butyl acetate, dibutyl oxalate, dibutyl phthalate, dimethyl phthalate, dioctyl phthalate, and diisooctyl phthalate. be done.
Acetylene glycols preferably include methoxybutyl acetate, ethoxybutyl acetate, ethyl carbitol acetate, propyl carbitol acetate, butyl carbitol acetate and the like.
Preferred ethers include methyl cellosolve, butyl cellosolve, isoamyl cellosolve, and the like.
Examples of resins include thermoplastic resins such as homopolymers or copolymers of acrylate monomers, polyamide resins, polyester resins, phenol resins, melamine resins, urea resins, epoxy resins, alkyd phthalate resins, and diallyl phthalate. Thermosetting resins such as resins, alkyd resins, and polyurethane resins are preferred, and thermosetting resins are particularly preferred.
The content of each preferred composition of the activator composition used in the present invention is 5 to 40% by mass for esters, 40 to 80% by mass for acetylene glycols, 5 to 30% by mass for ethers, and 1% for resins. It is about 20% by mass.

The application of the activator composition may be performed by gravure printing, spray coating, or the like, and the coating amount is usually 1 to 50 g/m ² , preferably 3 to 30 g/m ² , more preferably 10 to 50 g/m 2 . 20 g/ ^m2 .

[Step (C)]
The step (C) is a step of pressing the transfer-receiving material onto the hydraulic transfer film that has undergone steps (A) and (B) and bringing the water-soluble ink layer and the pattern layer into close contact with the transferred surface of the transfer-receiving material by water pressure. be.
The water for floating the hydraulic transfer film and applying water pressure is preferably adjusted to an appropriate water temperature according to the type of water-soluble film of the hydraulic transfer film, preferably 25 to 50 ° C., more preferably 25 ° C. ~35°C.
Further, the transfer time between the hydraulic transfer film of the present invention and the material to be transferred is preferably about 20 to 120 seconds, more preferably about 30 to 60 seconds.

(transferee)
Examples of the material to be transferred include polystyrene resin, acrylonitrile-butadiene-styrene copolymer (ABS resin), polycarbonate resin, melamine resin, phenol resin, urea resin, fiber resin, resin such as polyethylene and polypropylene, or these. In addition to mixed resins, structures made of materials such as metals such as iron, aluminum, and copper, ceramics such as ceramics, glass, and enamel, and wood can be used.
Further, the shape of the surface to be transferred may be a two-dimensional shape such as a planar shape, or may be a three-dimensional shape such as an uneven shape or a curved surface shape. Among these, resin-made structures are commonly used. During molding, a mold release agent may adhere to this resin structure, as well as dust and grease. It is preferable to keep the surface clean.

The surface to be transferred may be colored by a method such as applying colored paint or applying a film by various vapor deposition methods, or may be provided with a pattern.
When the surface to be transferred has a color or a pattern, the surface to be transferred is exposed at the missing part consisting of the water-soluble ink layer and the pattern layer peeled off together with the water-soluble ink layer, thereby constructing the design of the decorative molded product. can be expected.

In the step (C), the activator composition applied to the water-soluble ink layer comes into contact with the transfer-receiving material and dissolves the surface of the transfer-receiving material. properties can be further improved.

[Step (D)]
The step (D) is carried out after the step (C), in which the water-soluble film, the water-soluble ink layer, and the pattern layer present on the water-soluble ink layer are removed from the transferred surface of the transfer-receiving body. This is the step of removing.
The water-soluble film, the water-soluble ink layer, and the pattern layer adhering to the transfer surface of the transfer-receiving body can be removed, for example, by washing with water such as shower washing.
The conditions for shower washing differ depending on the materials forming the water-soluble film, the water-soluble ink layer and the picture layer, but usually the water temperature is preferably about 15 to 60° C. and the washing time is about 10 seconds to 5 minutes.
Then, after the step (D), if the material to be transferred is sufficiently dried to evaporate the water content, a decorative molded product having a design transferred to the surface to be transferred of the material to be transferred can be obtained.

[Step (E)]
Step (E) is a step of forming a top coat layer on the transfer surface of the transferred material, if necessary.
In the step (E), the design transferred to the transferred surface of the transfer-receiving body in the step (D) is painted as necessary for improving the surface strength, protecting the surface, adjusting the surface gloss, etc. , to form a transparent or translucent topcoat layer. Materials for forming this topcoat layer include, for example, thermoplastic resins, thermosetting resins, ionizing radiation-curable resins (ultraviolet-curable resins, electron beam-curable resins), and more specifically urethane-based resins and epoxy resins. , acrylic resins, fluorine-based resins, silicon-based resins, and the like are used. The topcoat layer can be formed by using a paint obtained by dissolving the above resin in a known organic solvent and using a known coating method such as spray coating, electrostatic coating, brush coating, or dip coating.
The thickness of the topcoat layer is not particularly limited, but is preferably 1 to 25 μm, more preferably 1 to 10 μm.

<Decorative molding>
The decorative molded article of the present invention has a pattern layer on a part of the molded body substrate, and in a plan view, the pattern part where the molded body substrate is exposed and the pattern part of the pattern layer are adjacent to each other. It is characterized in that there is a border, the pattern portion of the pattern layer is composed of two or more regions having different colors, and the two or more regions are aligned along the boundary.
More specifically, the decorative molded article of the present invention has a pattern layer 2 on a part of a molded body substrate 4 (transferred body) as shown in FIG. has an exposed handle portion 3'. The cutout pattern portion 3' can be formed by removing both the water-soluble ink layer and the pattern layer existing above the water-soluble ink layer.

In addition, the decorative molded product of the present invention has a border where the pattern part 3' where the base material of the molded body is exposed and the pattern part 2' of the pattern layer are adjacent to each other, as shown in FIG. X exists, and the pattern portion 2' of the pattern layer is composed of two or more regions with different colors. The two or more regions 2-1, 2-2, and 2-3 are characterized in that they are aligned along the boundary X. FIG.
The above-mentioned "two or more regions are aligned along the boundary" means that the deviation 'Y' between the regions 2-2 and 2-3 shown in FIG. 5 is 25 μm or less. be. The value of the deviation 'Y' can be measured using a laser microscope.

In addition, as another example of the embodiment of the decorative molded product, a pattern layer is provided on a part of the molded body base material, and in a plan view, the pattern part where the other layers are exposed and the pattern part of the pattern layer are adjacent to each other, the pattern portion of the pattern layer is composed of two or more regions with different colors, and the two or more regions are aligned along the boundary.
Another example of a more specific embodiment of the above-described decorative molded product, as shown in FIG. Another layer 5 is provided between the base material 4 and the pattern layer 2, and the other layer 5 is exposed to form a pattern portion 3'. As shown in FIG. 4, the cut-out pattern portion 3' in which the other layer 5 is exposed uses a hydraulic transfer film having a layer structure of the above-described water-soluble film, pattern layer, water-soluble ink layer, and other layers, It can be formed by removing both the water-soluble ink layer and the pattern layer existing on the water-soluble ink layer.

The decorative molded article of the present invention is formed by removing both the water-soluble ink layer and the pattern layer existing above the water-soluble ink layer in the pattern part 3' shown in FIG. 2 or 4. Therefore, in a cross-sectional view, at least a portion, preferably all, of the pattern layer at the boundary can be flush.
It should be noted that it can be identified by a scanning electron microscope (SEM) that the pattern layer is flush at the boundary in a cross-sectional view.

In the decorative molded product, it is preferable that the pattern layer is composed of two or more layers from the viewpoint that the effect of the present invention can be exhibited more similarly to the pattern layer in the hydraulic transfer film described above.
Further, in the same manner as the water-soluble ink layer in the hydraulic transfer film described above, the pattern part where the molded body base material formed by the water-soluble ink layer is exposed is geometrically A pattern is preferably formed.

EXAMPLES The present invention will be specifically described below with reference to Examples, but the present invention is not limited to these.

[Example 1]
(1) Manufacture of hydraulic transfer film As a water-soluble film, a PVA film (thickness: 40 µm) was used, and each of the colorant compositions 1 to 3 having the following formulation was used so that a wood grain pattern was formed on one side of the film. was used for each layer to form a picture layer (three-layer structure) having a thickness of 1 μm by gravure printing.
Next, a water-soluble composition having the following formulation is formed on a part of the pattern layer so that a honeycomb pattern (the interval between two parallel sides forming one hexagon is 1.5 mm) is formed. Using the ink composition, a water-soluble ink layer having a thickness of 1 μm was formed by a gravure printing method, and a hydraulic transfer film whose schematic cross-sectional view is shown in FIG. 1 was produced.
(Colorant composition 1)
・Nitrated cotton, black color pigment, solvent (colorant composition 2)
・Nitrated cotton, brown color pigment, solvent (colorant composition 3)
・Nitrated cotton, brown color pigment, solvent (water-soluble ink composition)
・Polyvinylpyrrolidone 15 parts by mass ・Barium sulfate 25 parts by mass ・Silica 5 parts by mass ・Solvent 55 parts by mass

(2) Manufacture of decorative molded product 10 g/m ² of an activator composition composed of the following formulation is applied to the water-soluble ink layer surface side of the hydraulic transfer film obtained as described above, and the water-soluble film side is After floating on the surface of the water so that it faces the water surface, the object to be transferred is pressed onto the hydraulic transfer film, and the design layer (water-soluble ink layer and pattern layer) is brought into close contact with the transfer surface of the object by water pressure. After the steps, a removing step was performed to remove the water-soluble film, the water-soluble ink layer, and the pattern layer existing above the water-soluble ink layer from the transfer surface of the transferred material.
Further, a 10 μm-thick topcoat layer was formed by spray-coating a two-liquid curing type urethane resin on the surface to be transferred to obtain a decorative molded product.
(Activator composition)
・Phthalic acid-based alkyd resin 6 parts by mass ・Microsilica (pigment) 2 parts by mass ・Dibutyl phthalate 17 parts by mass ・Solvent (butyl carbitol acetate) 60 parts by mass ・Solvent (butyl cellosolve) 15 parts by mass

(3) Evaluation Visual observation revealed that the boundary between the wood grain pattern and the stripped pattern was not blurred, and a decorative molded product giving an impression of a high-definition stripped pattern was obtained.
When the plane of the design of the obtained decorative molded product was observed with a laser microscope, it was found that regions with different colors of the wood grain pattern were aligned along the boundary between the wood grain pattern and the punched pattern. It could be confirmed.
Table 1 shows the results of evaluating the printability of the hydraulic transfer film and the pattern omission of the decorative molding.

[Example 2]
(1) Manufacture of hydraulic transfer film and decorative molded product In the same manner as in Example 1, except that the water-soluble ink composition was replaced with a water-soluble ink composition composed of the following formulation, a hydraulic transfer film and a decorative product were produced. A molded article was obtained.
(Water-soluble ink composition)
・Casein 10 parts by mass ・Water-soluble acrylic resin 5 parts by mass ・Silica 5 parts by mass ・Solvent 80 parts by mass (2) Evaluation By visual observation, although some omissions of the wood grain pattern are observed, the wood grain pattern and the pattern are formed. A decorated molded product was obtained.
When the plane of the design of the obtained decorative molded product was observed with a laser microscope, it was found that regions with different colors of the wood grain pattern were aligned along the boundary between the wood grain pattern and the punched pattern. It could be confirmed.
Table 1 shows the results of evaluating the printability of the hydraulic transfer film and the pattern omission of the decorative molding.

[Example 3]
(1) Manufacture of hydraulic transfer film and decorative molded product After forming a water-soluble ink layer in Example 1, silver ink containing an aluminum pigment, nitrocellulose, and a solvent was printed on the entire surface by gravure printing to a thickness of 1 μm. A silver solid layer was formed, and a hydraulic transfer film whose schematic sectional view is shown in FIG. 3 was manufactured.
A decorative molded product was obtained in the same manner as in Example 1 using the hydraulic transfer film described above.
(2) Evaluation Visual observation revealed that the boundary between the wood grain pattern and the stripped pattern was not blurred, and a decorative molded product giving an impression of a high-definition stripped pattern was obtained. In addition, in the stripped pattern portion formed by peeling off the water-soluble ink layer and the pattern layer, the silver solid layer becomes a honeycomb pattern and is exposed on the surface of the decorative molded product, resulting in a brilliant, delicate, complicated and excellent design. It became a decorative molded product having.
When the plane of the design of the obtained decorative molded product was observed with a laser microscope, it was found that regions with different colors of the wood grain pattern were aligned along the boundary between the wood grain pattern and the punched pattern. It could be confirmed.
Table 1 shows the results of evaluating the printability of the hydraulic transfer film and the pattern omission of the decorative molding.

<Evaluation Criteria>
(printable)
○: In the obtained hydraulic transfer film, the water-soluble ink is printed evenly in the desired pattern and is fixed. △: In the obtained hydraulic transfer film, unevenness of the water-soluble ink, poor drying, etc. occur. However, the desired pattern is printed and fixed ×: In the obtained hydraulic transfer film, the water-soluble ink is not fixed and the desired pattern cannot be printed (pattern missing)
○: In the obtained decorative molded product, it is clearly missing along the pattern printed with water-soluble ink △: In the obtained decorative molded product, there are some unclear parts, but it is generally water soluble Missing along the pattern printed with ink ×: In the obtained decorative molded product, the pattern or the missing pattern is broken, the design is uniform without missing the pattern

According to the hydraulic transfer film of the present invention, a decorative molded product having a high-definition pattern can be obtained. In addition, by using the hydraulic transfer film of the present invention, the above-mentioned decorative molding can be obtained efficiently with various designs having a pattern and with good stability in mass production. Furthermore, the decorative molded article of the present invention is useful for automobile interior parts, home electric appliances, OA equipment, and the like.

1. Water-soluble film2. Picture layer 2'. Pattern part 3. Water-soluble ink layer 3'. Removed handle 4 . Molded body substrate (transferred body)
5. Other layer (solid layer)
X. Boundaries 10 . Hydraulic transfer film 20. Decorative molding

Claims (6)

A hydraulic transfer film, wherein the hydraulic transfer film has a water-soluble film, a pattern layer, and a water-soluble ink layer in order, and has the water-soluble ink layer on a part of the pattern layer ,
A hydraulic transfer film further comprising a solid layer on the water-soluble ink layer and on the entire surface of the hydraulic transfer film. 2. The hydraulic transfer film according to claim 1, wherein the pattern layer is composed of two or more layers. The hydraulic transfer film according to claim 1 or 2, wherein the pattern layer is formed with two or more colors. The hydraulic transfer film according to any one of claims 1 to 3, wherein the water-soluble ink layer forms a geometric pattern. A method for manufacturing a decorative molded product, comprising the following steps (A) to (D) in order.
Step (A): A step of floating the hydraulic transfer film according to any one of claims 1 to 4 on the water surface so that the water-soluble film side faces the water surface side.
Step (B): A step of applying an activator composition to the water-soluble ink layer side of the hydraulic transfer film.
Step (C): A step of pressing a material to be transferred onto the hydraulic transfer film that has undergone steps (A) and (B) and bringing the water-soluble ink layer side into close contact with the surface of the material to be transferred by water pressure.
Step (D): removing together the water-soluble film, the water-soluble ink layer, and the design layer present on the water-soluble ink layer, which are in close contact with the transfer surface of the transfer-receiving material. 6. The method for manufacturing a decorative molded product according to claim 5, wherein said removal is performed by washing with water in said step (D).

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