WO2014157316A1 - 水圧転写フィルム及びこれを用いた加飾成形品 - Google Patents
水圧転写フィルム及びこれを用いた加飾成形品 Download PDFInfo
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- WO2014157316A1 WO2014157316A1 PCT/JP2014/058488 JP2014058488W WO2014157316A1 WO 2014157316 A1 WO2014157316 A1 WO 2014157316A1 JP 2014058488 W JP2014058488 W JP 2014058488W WO 2014157316 A1 WO2014157316 A1 WO 2014157316A1
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- WIPO (PCT)
- Prior art keywords
- resin
- water
- hydraulic transfer
- transfer film
- layer
- Prior art date
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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Definitions
- the present invention relates to a hydraulic transfer film and a decorative molded product using the same.
- molded products having decorations such as wood grain or metallic tone (metallic luster) on the surface are used.
- decorations such as wood grain or metallic tone (metallic luster) on the surface.
- Many of these molded products have a complicated three-dimensional shape, and conventionally, a method of simply applying a highly designed decoration to a molded product having the complicated shape has been studied.
- a water pressure transfer method using water pressure is known. This water pressure transfer method can perform transfer processing to a three-dimensional surface, “depth” such as a clear paint feeling, and high quality pattern expression. It is known that it is an excellent curved surface decorating method in terms of design properties.
- a glittering ink layer was used, and it was considered to provide a concavo-convex shape on the glittering ink layer. As a result, it was not possible to obtain a design with excellent glitter and luxury. Furthermore, in order to maintain the uneven shape of the glitter ink layer and prevent the disappearance of the uneven feeling, a resin layer is provided between the water-soluble film, which is the base material of the hydraulic transfer film, and the glitter ink layer. It was studied to suppress excessive extension of the ink layer. However, depending on the type of resin that forms the resin layer, the glitter ink layer cannot be formed into a glittering ink layer, for example, the glitter ink layer may be peeled off during the production of a hydraulic transfer film.
- the present invention has a glittering ink layer, has a well-shaped uneven shape during the production of a hydraulic transfer film, and has a design property with excellent glitter and luxury. It is an object of the present invention to provide a hydraulic transfer film that can be applied to a resin molded product, a method for producing the same, and a decorative molded product using the film.
- this invention provides the following hydraulic transfer film, its manufacturing method, and the decorative molded product using this film.
- Item 1 On a water-soluble film, it consists of a laminate having an extension suppressing resin layer, and a glitter ink layer containing a glitter pigment and a binder resin, The surface of the laminate opposite to the water-soluble film has an uneven shape, A hydraulic transfer film, wherein the resin forming the extension inhibiting resin layer contains a resin A having a glass transition temperature of 80 ° C. or higher.
- Item 2. The hydraulic transfer film according to Item 1, wherein the extension suppressing resin layer and the glitter ink layer are provided in this order on a water-soluble film.
- Item 3. Item 2. The hydraulic transfer film according to Item 1, wherein the glittering ink layer and the extension inhibiting resin layer are provided in this order on a water-soluble film.
- Item 9. Item 4. The hydraulic transfer film according to Item 3, wherein the extension suppressing layer has a multilayer structure of two or more layers.
- Item 10. Item 10. The hydraulic transfer film according to Item 9, wherein a resin that forms an extension suppressing resin layer located on the outermost surface of the extension suppressing layer having a multilayer structure includes an alkyd resin and a nitrocellulose resin as the resin A.
- the hydraulic transfer film according to Item 9 or 10 wherein the extension suppressing resin layer other than the extension suppressing layer located on the outermost surface of the extension suppressing layer having the multilayer structure includes an acrylic polyol resin as the resin A.
- Item 12. Item 3. The hydraulic transfer film according to Item 2, further comprising a second extension suppressing resin layer containing the resin A on the opposite side of the glitter ink layer from the extension suppressing resin layer.
- Item 13. Item 13.
- Item 14 The manufacturing method of the hydraulic transfer film which has the following processes in order.
- Step (1) On the water-soluble film, an extension suppressing resin layer formed of a resin composition containing a resin A having a glass transition temperature of 80 ° C. or higher and a glittering ink layer containing a glittering pigment and a binder resin are laminated.
- Process Process (2) The process of embossing from the surface on the opposite side to the said water-soluble film of the said laminated body 15.
- a method for producing a decorative molded article comprising the following steps (a) to (c) in order. Step (a) Before or after the hydraulic transfer film according to any one of claims 1 to 13 is floated on the water surface so that the water-soluble film side faces the water surface side, the water-pressure transfer film is opposite to the water-soluble film.
- a water-soluble film it consists of a laminate having an extension suppressing resin layer, and a glitter ink layer containing a glitter pigment and a binder resin, The surface of the laminate opposite to the water-soluble film has an uneven shape, Use of a film containing a resin A having a glass transition temperature of 80 ° C. or more as a resin for forming the extension suppressing resin layer for decorating a transfer medium by hydraulic transfer.
- the hydraulic transfer film of the present invention has a well-shaped shape at the time of production, and can impart design properties with excellent glitter and luxury to the resin molded product.
- a transfer film By using a transfer film, it is possible to provide a decorative molded product having a design with excellent luster and luxury.
- the hydraulic transfer film 10 of the present invention is composed of a laminate having an extension suppressing resin layer 12 and a glitter ink layer 13 containing a glitter pigment and a binder resin on a water-soluble film 11, and the water-soluble property of the laminate.
- the resin having an uneven shape on the surface opposite to the film and forming the extension suppressing resin layer contains a resin A having a glass transition temperature of 80 ° C. or higher.
- the hydraulic transfer film 10 of the present invention may be a laminate having an extension suppressing resin layer 12 and a glitter ink layer 13 in this order on a water-soluble film 11.
- a laminate in which the water-soluble film 11 / the stretch suppressing resin layer 12 / the glitter ink layer 13 are laminated in this order may be referred to as “laminate A”.
- the hydraulic transfer film 10 of the present invention is a laminate having a glittering ink layer 13 and an extension inhibiting resin layer 12 in this order on a water-soluble film 11. Also good.
- the extension suppressing resin layer 12 has a multilayer structure of two or more layers.
- the hydraulic transfer film 10 shown in FIG. 4 includes two extension suppressing resin layers, namely, extension suppressing resin layers 12a and 12b. Have.
- a laminate in which the water-soluble film 11 / the glitter ink layer 13 / the extension suppressing resin layer 12 are laminated in this order may be referred to as “laminate B”.
- the water-soluble film has a role of a substrate in the hydraulic transfer film of the present invention, and is removed when obtaining a decorative molded product after the hydraulic transfer.
- the water-soluble film is not particularly limited as long as it has water-solubility or water-swelling property, and can be appropriately selected from water-soluble films generally used as a conventional hydraulic transfer film.
- the resin constituting the water-soluble film examples include polyvinyl alcohol resin, dextrin, gelatin, glue, casein, shellac, gum arabic, starch, protein, polyacrylamide, sodium polyacrylate, polyvinyl methyl ether, methyl vinyl ether and anhydrous
- Various water-soluble polymers such as copolymers with maleic acid, copolymers of vinyl acetate and itaconic acid, polyvinylpyrrolidone, acetylcellulose, acetylbutylcellulose, carboxymethylcellulose, methylcellulose, hydroxyethylcellulose, sodium alginate and the like can be mentioned.
- These resins may be used alone or in combination of two or more.
- rubber components such as mannan, xanthan gum, and guar gum, may be added to the water-soluble film.
- a polyvinyl alcohol (PVA) resin film is particularly preferable from the viewpoints of production stability, solubility in water and economy.
- the polyvinyl alcohol resin film may contain additives such as starch and rubber in addition to PVA.
- Polyvinyl alcohol resin film is necessary when forming a printing layer for transfer on a water-soluble film by changing the degree of polymerization of polyvinyl alcohol, the degree of saponification, and the amount of additives such as starch and rubber.
- the 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. it can.
- a suitable water-soluble film comprising a polyvinyl alcohol resin film is the one described in JP-A-54-92406, for example, 80% by mass of PVA resin, 15% by mass of polymer water-soluble resin.
- a composition having a mixed composition of 5% by mass of starch and having an equilibrium water content of about 3% is preferable.
- the polyvinyl alcohol resin film is water-soluble, it is preferable that the film remains as a film while being swollen and softened in water at a stage before being dissolved in water. This is because, by performing the hydraulic transfer while the film is still alive, it is possible to prevent an excessive flow and deformation of the printing layer for transfer during the hydraulic transfer.
- the thickness of the water-soluble film is preferably 10 to 100 ⁇ m. When it is 10 ⁇ m or more, the uniformity of the film is good and the production stability is high. On the other hand, when it is 100 ⁇ m or less, the solubility in water is moderate and the printability is excellent. From the above viewpoint, the thickness of the water-soluble film is more preferably in the range of 20 to 60 ⁇ m.
- the water-soluble film can be used by being laminated with a water-permeable base material such as paper, nonwoven fabric, and cloth, for example.
- a water-permeable base material such as paper, nonwoven fabric, and cloth, for example.
- the water-permeable substrate is separated from the water-soluble or water-swellable water-soluble film, or on the water surface. It is preferable that the substrate having water permeability is separated from the water-soluble film having water solubility or water swellability by the action of water after floating.
- the stretch-inhibiting resin layer is a layer that is provided on the water-soluble film and needs to contain a resin A having a glass transition temperature of 80 ° C. or higher as the resin that forms the stretch-inhibiting resin layer.
- the extension suppressing resin layer is transferred to a resin molded product. Since it becomes a layer located on the surface layer side of the glittering ink layer after being formed, and the glittering ink layer is visually recognized through the extension suppressing resin layer, the glittering ink layer must be transparent so that it can be visually recognized more clearly. preferable.
- transparent is a concept including colorless and transparent as well as colored and translucent.
- the extension suppressing resin layer may have a single layer structure or a multilayer structure of two or more layers.
- the extension suppression resin layer is a resin molded product.
- the glitter ink layer is positioned on the back surface side of the glitter ink layer after being transferred to the film, and the glitter ink layer is not visually recognized through the extension suppressing resin layer. Therefore, it can be selected according to the desired design regardless of whether it is transparent, translucent, opaque, or colored.
- the extension suppressing resin layer may have a single layer configuration or a multilayer configuration of two or more layers.
- the resin that forms the stretch-inhibiting resin layer needs to contain resin A having a glass transition temperature of 80 ° C. or higher. If the resin forming the extension suppressing resin layer does not contain the resin A having a glass transition temperature of 80 ° C. or higher, excellent moldability cannot be obtained, and excellent design properties cannot be obtained.
- the upper limit of the glass transition temperature is not particularly limited, but is preferably 145 ° C. or less, and more preferably 130 ° C. or less from the viewpoint of improving transfer processability (following property).
- the glass transition temperature is measured as follows. Using a differential scanning calorimeter, the temperature was raised to 200 ° C., and a sample cooled from the temperature to 0 ° C. at a temperature lowering rate of 10 ° C./min was measured at a temperature rising rate of 10 ° C./min. When a peak is observed at a temperature 20 ° C. or more lower than the softening point, the peak temperature is measured. When a peak is not observed at a temperature 20 ° C. or higher lower than the softening point, a step is observed. The temperature at the intersection of the tangent line indicating the maximum slope of the curve and the extension line of the base line on the high temperature side of the step was read as the glass transition temperature.
- the resin A is not particularly limited as long as it has a glass transition temperature of 80 ° C. or higher.
- an acrylic resin, an acrylic polyol resin, a nitrocellulose resin, and a vinyl chloride-vinyl acetate copolymer resin are preferable.
- Acrylic polyol resins are preferred. In this invention, these resin can be used individually or in combination of multiple types.
- the resin A it is preferable to use a water-insoluble resin from the viewpoint of suppressing the excessive extension of the glitter ink layer at the time of hydraulic transfer and favorably forming the uneven appearance part corresponding to the uneven shape.
- the water-insoluble resin refers to a resin generally known as a water-insoluble resin, and specific examples thereof include those preferably exemplified as the resin A.
- resin which forms an extension suppression resin layer as long as the said resin A is included, you may contain other resin, for example, resin B with a glass transition temperature of less than 80 degreeC.
- resin B used in combination with the resin A for example, a resin having a glass transition temperature of 60 ° C. or lower is preferable, a resin having a glass transition temperature of 10 ° C. or lower is more preferable, and a resin having a glass transition temperature of 10 ° C. or lower is more preferable.
- Preferred examples of the resin B include polyolefin resins such as polyethylene and polypropylene, urethane resins, acetal resins, and alkyd resins, and urethane resins and alkyd resins are preferable.
- the resin B having a low glass transition temperature By combining the resin B having a low glass transition temperature, excellent transfer processability (followability) can be obtained.
- an acrylic polyol resin when used as the resin A, it is preferably combined with a urethane resin, and when a nitrocellulose resin is used as the resin A, it is preferably combined with an alkyd resin.
- the content of the resin A in the resin forming the extension suppressing resin layer is preferably 50% by mass or more, more preferably 50 to 95% by mass, still more preferably 60 to 90% by mass, and particularly preferably 70 to 90% by mass. It is 85 mass%.
- content of the resin A in the resin is within the above range, excellent moldability and design properties are obtained, and excellent transfer processability (follow-up property) is also obtained.
- the thickness of the stretch suppressing resin layer is preferably 0.5 to 10 ⁇ m, more preferably 0.5 to 5 ⁇ m, and further preferably 0.5 to 2.5 ⁇ m.
- the thickness of the extension suppressing resin layer is the thickness of one extension suppressing resin layer when the extension suppressing resin layer has a multilayer structure.
- excellent moldability and design properties can be obtained, and excellent transfer processability (followability) can be obtained. Further, it is possible to secure the time for applying the activator at the time of the hydraulic transfer, and to transfer it to the transfer target more suitably.
- the uneven shape of the hydraulic transfer film exists at least on the surface opposite to the glittering ink layer side of the stretch-inhibiting resin layer.
- the hydraulic transfer film of the present invention has a concavo-convex shape and forms a concavo-convex sensation expressing portion corresponding to the concavo-convex shape at the time of hydraulic transfer to maintain a concavo-convex sensation, thereby expressing a high-class feeling in addition to glitter. sell. As shown in FIG.
- the concave / convex shape may be such that the concave portion stays in the stretch-inhibiting resin layer, or reaches the glittering ink layer or even the water-soluble film.
- the recess may remain in the extension suppressing resin layer 12 b, or the extension suppressing resin layer 12 a, A glittering ink layer or even a water-soluble film may be used.
- the concavo-convex shape preferably extends to the glitter ink layer and the water-soluble film.
- the depth of the concavo-convex shape of the laminate B is the depth of the concavo-convex concave portion.
- the depth of the concave portion is the maximum value of the depth from the straight line when the surface of the extension suppressing resin layer opposite to the side where the glittering ink layer is provided is regarded as a substantially straight line.
- the period width (pitch) of the concavo-convex shape is preferably 10 to 100 ⁇ m, more preferably 20 to 40 ⁇ m.
- the period width (pitch) of the concavo-convex shape of the laminate B is a separation distance between adjacent convex portions.
- the width of the concavo-convex shape of the laminate B is preferably 10 to 100 ⁇ m, more preferably 20 to 40 ⁇ m.
- the width of the concavo-convex shape is within the above range, excellent moldability and design properties can be obtained.
- corrugated shape of the laminated body B is the width
- the uneven shape can be suitably provided by embossing.
- the uneven shape may be determined according to the glitter design expression, and may be appropriately selected according to the combination with the pattern of the glitter ink layer.
- Wood grain conduit groove, wood grain annual ring pattern, sand grain pattern, stone pattern, metal crystal surface pattern, cloth pattern, satin pattern, leather pattern, matte surface pattern, hairline pattern, spin tone pattern, letters, symbols, geometric figures, etc. Is preferred.
- the uneven shape may be patterned so as to exhibit a hologram effect in combination with the glitter ink layer.
- the extension suppressing resin layer preferably has a multilayer structure of two or more layers.
- a moldability and designability can further be improved.
- transferability in addition to formability and design properties, it is preferably 2 to 4 layers, more preferably 2 to 3 layers, and particularly preferably 2 layers.
- the time for applying the activator during hydraulic transfer is ensured, and the degree of penetration of the activator into the extension-suppressing resin layer and the glitter ink layer can be easily adjusted, so that it can be more suitably transferred to the transfer target. .
- the resin forming the extension suppressing resin layer located on the outermost surface preferably includes an alkyd resin and a nitrocellulose resin as the resin A. This is because excellent formability, designability, and transfer processability (follow-up property) can be obtained.
- the resin that forms the outermost stretch suppression resin layer includes an alkyd resin and a nitrocellulose resin as the resin A
- the resin that forms the stretch suppression resin layer other than the stretch suppression resin layer located on the outermost surface is a resin.
- A preferably contains an acrylic polyol resin. Due to the synergistic effect of the combination of the outermost stretch suppressing resin layer and the stretch suppressing resin layer other than the outermost surface, extremely excellent moldability, designability, and transfer processability (followability) can be obtained.
- the glitter ink layer is a layer that exhibits glitter. Further, when the hydraulic transfer film 10 of the present invention has the laminated structure of the above laminate A, it exhibits brilliancy and at least unevenness on the surface of the brilliant ink layer on the side opposite to the extension suppressing resin layer. It is a layer that expresses a sense of quality by having a shape.
- the concavo-convex shape of the hydraulic transfer film having a laminate structure of the laminate A (hereinafter, sometimes simply referred to as “laminate A”) is at least the side of the extension inhibiting resin layer of the glitter ink layer. It must be on the opposite side.
- the hydraulic transfer film of the present invention has a concavo-convex shape and forms a concavo-convex sensation expressing portion corresponding to the concavo-convex shape at the time of hydraulic transfer to maintain a concavo-convex sensation, thereby expressing a high-class feeling in addition to glitter. sell. As shown in FIG.
- the concave-convex shape of the laminate A may be such that the concave portion stays in the glittering ink layer, extends to the stretch-inhibiting resin layer, and further to the water-soluble film. Also good.
- the concavo-convex shape of the laminate A extends to the stretch-inhibiting resin layer and the water-soluble film. Is preferred.
- the depth of the concavo-convex shape of the laminate A is preferably 5 to 80%, more preferably 10 to 70% with respect to the total thickness of the hydraulic transfer film from the viewpoint of obtaining excellent moldability and design. More preferably 20 to 60%.
- the depth of the concavo-convex shape of the laminate A is the depth of the concavo-convex concave portion.
- the depth of the concave portion of the laminate A is the maximum value of the depth from the straight line when the surface of the glittering ink layer opposite to the side on which the extension suppressing resin layer is provided is regarded as a substantially straight line. .
- the period width (pitch) of the concavo-convex shape is preferably 10 to 100 ⁇ m, more preferably 20 to 40 ⁇ m.
- the periodic width (pitch) of the concavo-convex shape of the laminate A is a separation distance between adjacent convex portions.
- the width of the concavo-convex shape of the laminate A is preferably 10 to 100 ⁇ m, more preferably 20 to 40 ⁇ m.
- the width of the concavo-convex shape of the laminate A is within the above range, excellent moldability and design properties can be obtained.
- corrugated shape is the width
- corrugated shape of the laminated body A can be suitably provided by embossing.
- the concavo-convex shape of the laminate A may be determined according to the glitter design expression, and may be appropriately selected according to the combination with the pattern of the glitter ink layer to be described later.
- the uneven shape may be patterned so as to exhibit a hologram effect in combination with the glitter ink layer.
- the glitter ink layer is preferably formed of glitter ink containing a binder resin and a glitter pigment.
- the binder resin include thermoplastic resins, and specific examples include polyester resins such as acrylic resins and alkyd resins, unsaturated polyester resins, urethane resins (for example, polyester urethane resins), polycarbonate resins, and vinyl chloride-vinyl acetate.
- Preferable examples include copolymer resins, polyvinyl acetal resins such as polyvinyl butyral (butyral resin), and nitrocellulose resins. These can be used alone or in combination. In the present invention, alkyd resins and nitrocellulose resins are preferred, and it is more preferred to use a mixture of these. When these binder resins are used, excellent moldability can be obtained.
- the luster pigment is not particularly limited as long as it is a pigment that can exhibit luster by light interference, and preferred examples thereof include metal pigments, pearl pigments, and phosphorescent pigments.
- the metal pigment is made of a metal or alloy such as gold, silver, platinum, palladium, nickel, copper, aluminum, chromium, brass, tin, or a metal oxide thereof, and has high glitter and is inexpensive. From the point of view, metal pigments made of scaly foil pieces such as aluminum and brass are preferred.
- preferred examples of the pearl pigment include a scale-shaped alumina pigment coated with titanium oxide or iron oxide, and a mica pigment coated with titanium oxide or iron oxide.
- the average particle diameter of the glitter pigment is preferably 1 to 20 ⁇ m, and more preferably 3 to 15 ⁇ m.
- excellent glitter can be obtained, and a high-class feeling can be easily obtained by combination with the uneven shape.
- the pattern of the glitter ink layer it may be appropriately selected according to the combination with the above-mentioned concavo-convex shape, and a grain pattern imitating the surface of a rock such as a wood grain pattern, marble pattern (for example, travertine marble pattern), There are fabric patterns imitating fabrics and cloth-like patterns, tiled patterns, brickwork patterns, etc., and patterns such as parquets and patchwork that combine these patterns. In addition, so-called solid printing in which the entire surface is uniformly colored may be used.
- the thickness of the glitter ink layer is preferably 0.5 to 5 ⁇ m, more preferably 0.5 to 3 ⁇ m, and further preferably 0.5 to 2 ⁇ m.
- excellent moldability and design properties are obtained, and excellent transfer processability (follow-up property) is also obtained.
- the extension of the glitter ink layer 13 is separate from the extension suppression resin layer 12 provided between the water-soluble film 11 and the glitter ink layer 13.
- a second extension suppressing resin layer 15 may be further provided on the side opposite to the suppressing resin layer 12. Similar to the extension suppressing resin layer 12, the second extension suppressing resin layer 15 is formed as a layer containing the resin A having a glass transition temperature of 80 ° C. or higher. By providing the second extended resin layer 15, it is possible to develop a more excellent uneven feeling in the decorative molded product.
- the uneven shape 14 is at least from the second extension suppressing resin layer 15 to the extension suppressing resin layer 12 of the glitter ink layer 13. It is formed over the opposite surface.
- the second extension suppressing resin layer 15 can have the same configuration as the extension suppressing resin layer 12 described above.
- the resin A included in the extension suppressing resin layer 12 and the resin A included in the second extension suppressing resin layer 15 may be the same resin, or may be different from each other.
- the second extension inhibiting resin layer 15 is particularly preferably a layer containing an alkyd resin and a nitrocellulose resin as the resin A. By adopting such a configuration, further excellent moldability is exhibited.
- the method for producing a hydraulic transfer film of the present invention comprises a step (1) an extension suppressing resin layer formed from a resin composition containing a resin A having a glass transition temperature of 80 ° C. or higher, a glitter pigment and a binder on a water-soluble film. A step of laminating a glittering ink layer containing a resin, and a step (2) embossing from the surface of the laminate opposite to the water-soluble film.
- the method for producing a hydraulic transfer film of the present invention will be described in detail for the case of the laminate A and the case of the laminate B.
- the production method includes the step (A) of suppressing the stretch formed by a resin containing resin A having a glass transition temperature of 80 ° C. or higher on the water-soluble film.
- a step of laminating a resin layer a step of laminating a glittering ink layer on the stretch-inhibiting resin layer, and a step (C) of the glittering ink layer opposite to the side of the stretch-inhibiting resin layer. It has a step of embossing from the surface and providing an uneven shape on at least the opposite surface of the glitter ink layer in order.
- the extension suppressing resin layer is laminated on the water-soluble film by a known coating method or printing method, a co-extrusion method with a water-soluble film, or by laminating a resin film on the water-soluble film.
- a known coating method or printing method it is preferable to use a known coating method or printing method.
- Known coating methods include gravure coating and reverse coating, and known printing methods include gravure printing.
- the glitter ink layer uses a glitter ink containing a binder resin and a glitter pigment, and is a known coating method or printing method mentioned as a method for forming the above-described stretch suppression resin layer. It is preferable to form.
- the embossing performed in the step (C) for forming the concavo-convex shape is usually at a temperature of 80 to 130 ° C. and a pressure of 20 to 100 ton / m 2 , preferably 20 to 60 ton / m 2 is applied for 1 to 10 minutes.
- a desired uneven shape is formed by an embossing apparatus or a continuous embossing process using an embossing roll or the like in a certain pressing time.
- an embossing plate used here if the dimension which can achieve the depth of the said uneven
- the depth of the uneven shape of the embossed plate is about 10 to 80 ⁇ m, preferably 20 to 60 ⁇ m, more preferably 30 to 45 ⁇ m.
- the production method thereof comprises a step (A) a step of laminating a glitter ink layer on a water-soluble film, and a step (B) the glitter ink layer.
- the glitter ink layer is preferably formed by a known coating method or printing method using a glitter ink containing a binder resin and a glitter pigment.
- Known coating methods include gravure coating and reverse coating, and known printing methods include gravure printing.
- the stretch-inhibiting resin layer may be a co-extrusion method with a water-soluble film provided with a glittering ink layer, in addition to the known coating method or printing method exemplified in the method for forming the glittering ink layer.
- the resin film is laminated on the glitter ink layer by laminating the resin film on the glitter ink layer side of the water-soluble film provided with the glitter ink layer.
- the embossing performed in the step (C) for forming the concavo-convex shape is usually at a temperature of 80 to 130 ° C. and a pressure of 20 to 100 ton / m 2 , preferably 20 to 60 ton / m 2 is applied for 1 to 10 minutes.
- a desired uneven shape is formed by an embossing apparatus or a continuous embossing process using an embossing roll or the like in a certain pressing time.
- an embossing plate used here if the dimension which can achieve the depth of the said uneven
- the depth of the uneven shape of the embossed plate is about 10 to 80 ⁇ m, preferably 20 to 60 ⁇ m, more preferably 30 to 45 ⁇ m.
- the method for producing a decorative molded product according to the present invention is the step (a) before or after the above-mentioned hydraulic transfer film is floated on the water surface so that the water-soluble film side faces the water surface, An activator application step of applying the activator composition to the opposite surface, step (b) transferred to the surface of the hydraulic transfer film floating on the water surface that has undergone the step (a) and applied with the activator composition A step of pressing the body and bringing the hydraulic transfer film into close contact with the transfer surface of the transfer body by water pressure, and a step (c) a film removal step for removing the water-soluble film in close contact with the transfer surface of the transfer body. It is characterized by that.
- the manufacturing method of the decorative molded product of this invention is a process (a) water-soluble film, a stretch suppression resin layer, and a glitter ink layer.
- a hydraulic transfer film that has a concavo-convex shape on at least the surface of the glittering ink layer opposite to the stretch-inhibiting resin layer, and the stretch-inhibiting resin layer contains a resin A having a glass transition temperature of 80 ° C. or higher.
- an activator application step of applying an activator composition to the glitter ink layer Before or after floating on the water surface so that the water-soluble film side faces the water surface, an activator application step of applying an activator composition to the glitter ink layer, step (b), through the step (a), A step of pressing a transfer material onto a water pressure transfer film floating on the water surface, and bringing the glitter ink layer into close contact with the transfer surface of the transfer material by water pressure; and a step (c) to which the transfer material is transferred Water-soluble film adhered to the surface and It is characterized in that it has a coating removal step of removing the exhibition suppression resin layer in this order.
- FIG. 2 is a schematic cross-sectional view showing an example of the configuration of a decorative molded product obtained by the method for manufacturing a decorative molded product according to the present invention when a hydraulic transfer film having a laminate structure of the above laminate A is used. It shows a decorative molded product when the hydraulic transfer film shown in FIG. 1 is used.
- the decorative molded product 20 obtained by the method of manufacturing a decorative molded product of the present invention has a transfer target 21, a glittering ink layer 13, and an extension suppressing resin layer 12 in this order.
- the decorative molded product has the designability provided with radiance and a high-class feeling. It has become.
- the top coat layer 22 can also be provided in a decorative molded product as needed.
- the manufacturing method of the decorative molded product of this invention is a process (a) water-soluble film, a glittering ink layer, and extension suppression resin.
- FIG. 5 is a schematic cross-sectional view showing an example of the configuration of a decorative molded product obtained by the method of manufacturing a decorative molded product according to the present invention when a hydraulic transfer film having a laminated structure of the above-described laminate B is used. It shows a decorative molded product when the hydraulic transfer film shown in FIG. 3 is used.
- the decorative molded product 20 obtained by the method of manufacturing a decorative molded product of the present invention shown in FIG. 5 has a transfer target 21, an extension suppressing resin layer 13, and a glittering ink layer 12 in this order.
- the concavo-convex sensation expressing portion 23 corresponding to the concavo-convex shape 14 of the extension suppressing resin layer 13 the concavo-convex sensation is maintained, whereby the decorative molded product has a design property with excellent radiance and luxury. It has become.
- the top coat layer 22 can also be provided in a decorative molded product as needed.
- the unevenness-expressing portion corresponding to the uneven shape is slightly different from the hydraulic transfer film of the present invention during the hydraulic transfer.
- the concavo-convex shape is formed into a gentle shape as a whole, and the concavo-convex sensation is visually maintained.
- the hydraulic transfer film of the present invention is moderately stretched during hydraulic transfer and forms an uneven feeling expression part to maintain the uneven feeling, and has an excellent design with excellent transfer processability (following property). Sex is also obtained.
- activator application process (a) In the activator coating step (a), before or after the hydraulic transfer film is floated on the water surface so that the water-soluble film side faces the water surface, the activator is applied to the surface of the hydraulic transfer film opposite to the water-soluble film. It is a step of applying a composition.
- the activator application step (a) is performed by applying the activator composition to the glitter ink layer before or after the hydraulic transfer film is floated on the water surface. It is a process of applying. In this step, by applying the activator to the glitter ink layer, the surface of the glitter ink layer is roughened, and it becomes easy to adhere to the transfer target.
- the activator coating step (a) is carried out in the stretch inhibiting resin layer before or after the hydraulic transfer film is floated on the water surface.
- This is a step of applying an object.
- the activator to the extension suppressing resin layer, the surface of the extension suppressing resin layer is roughened, and it becomes easy to adhere to the transfer target.
- 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 float the hydraulic transfer film on the surface of the water, it is possible to float one sheet of printed matter at a time, or to flow water in one direction and continuously supply a continuous belt-like hydraulic transfer film on the surface of the water. May be suspended.
- the activator composition is not particularly limited as long as it is a composition that can roughen the glittering ink layer for transfer in the hydraulic transfer film and has a function of dissolving the surface of the transfer target described later. It is preferable that the ink does not evaporate until the glittering ink layer is transferred to the transfer surface of the transfer body.
- the composition containing ester, acetylene glycol, ethers, and resin is mentioned preferably, for example.
- 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. It is done.
- Preferred examples of acetylene glycols include methoxybutyl acetate, ethoxybutyl acetate, ethyl carbitol acetate, propyl carbitol acetate, and butyl carbitol acetate.
- ethers include methyl cellosolve, butyl cellosolve, and isoamyl cellosolve.
- resins thermoplastic resins such as acrylate monomers alone or copolymers, polyamide resins, polyester resins, phenol resins, melamine resins, urea resins, epoxy resins, alkyd phthalate resins, diallyl phthalates
- thermosetting resins such as resins, alkyd resins, and polyurethane resins, and among these, thermosetting resins are preferred.
- 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 resin. About 20% by mass.
- the activator composition may be applied by spray coating or the like, and the application amount is usually 1 to 50 g / m 2 , preferably 3 to 30 g / m 2 , more preferably 10 to 20 g / m 2. 2 .
- step (b) the transferred body is pressed against the surface of the hydraulic transfer film floating on the water surface applied with the activator composition, and the hydraulic transfer film is transferred by water pressure.
- This is a step of closely contacting the transfer surface of the body.
- a process (b) presses a to-be-transferred body on the hydraulic transfer film which floated on the water surface which passed through the process (a)
- the glitter ink layer is brought into close contact with the transfer surface of the transfer object by water pressure.
- the step (b) presses the transferred object onto the hydraulic transfer film floating on the water surface after the step (a).
- the extension suppressing resin layer is brought into close contact with the transfer surface of the transfer object by water pressure.
- the water for applying the floating water pressure to the water pressure transfer film should be adjusted to an appropriate water temperature according to the type of the water-soluble film, etc., preferably about 25 to 50 ° C., more preferably 25 to 35 ° C. .
- the transfer time between the hydraulic transfer film of the present invention and the transfer target is preferably about 20 to 120 seconds, more preferably about 30 to 60 seconds.
- the transfer time is the time from when the transfer film of the present invention is suspended in water until the transfer to the transfer target is completed.
- Examples of the material to be transferred include polystyrene resin, acrylonitrile-butadiene-styrene copolymer resin (ABS resin), polycarbonate resin, melamine resin, phenol resin, urea resin, fiber resin, polyethylene, polypropylene, and the like.
- ABS resin acrylonitrile-butadiene-styrene copolymer resin
- polycarbonate resin polycarbonate resin
- melamine resin phenol resin
- phenol resin phenol resin
- urea resin urea resin
- fiber resin polyethylene, polypropylene, and the like.
- a structure made of a material such as a metal such as iron, aluminum, or copper, ceramics such as ceramics, glass, or wood, or wood can be used.
- the shape of the transferred surface may be a two-dimensional shape that is a planar shape, or may be a three-dimensional shape such as an uneven shape or a curved shape.
- resin structures are usually used frequently.
- a release agent adheres at the time of molding, and dust and fat may also adhere, and the glittering ink layer of the hydraulic transfer film, the extension suppressing resin layer, or the second extension suppressing.
- the activator composition applied on the glitter ink layer is in contact with the transferred body, and the surface of the transferred body is dissolved, whereby the adhesiveness between the transfer film of the present invention and the transferred body. Will be good.
- the film removal step (c) is a step of removing the water-soluble film adhered to the transfer surface of the transfer object.
- the water-soluble film can be removed by, for example, shower cleaning using water.
- the shower cleaning conditions vary depending on the material for forming the water-soluble film, but usually a water temperature of about 15 to 60 ° C. and a cleaning time of about 10 seconds to 5 minutes are preferable.
- the method for producing a decorative molded product of the present invention may further include a step (d) of forming a topcoat layer on the transferred extension suppressing resin layer, if desired, after the step (c).
- a step (d) of forming a topcoat layer on the transferred extension suppressing resin layer may further include a step (d) of forming a topcoat layer on the transferred extension suppressing resin layer, if desired, after the step (c).
- a topcoat agent can be applied to form a topcoat layer.
- top coat agent for example, a thermoplastic resin, a thermosetting resin, an ultraviolet curable resin, and the like, specifically, a resin composition containing a urethane resin, an epoxy resin, an acrylic resin, a fluororesin, a silicon resin, and the like are preferable. .
- the top coat layer can be formed by coating and curing these resin compositions.
- a coating method known methods such as spray coating, electrostatic coating, brush coating, and dip coating can be used.
- the curing method may be appropriately selected depending on the resin composition to be used. If a thermoplastic resin is used, it may be cured for several days. If a thermosetting resin is used, heat treatment may be performed. In the case of using a functional resin, it may be performed by irradiating with an appropriate ultraviolet ray.
- Embossing (embossing conditions: temperature 120 ° C., pressure 40 ton / m 2 , press time 5 minutes) was applied to the glittering ink layer of the hydraulic transfer film in each example, and the embossed plate was peeled off. The appearance of the surface of the glitter ink layer later was visually observed and evaluated according to the following criteria. A: The uneven shape was shaped very well without peeling off the glitter ink layer.
- the transferred object After undergoing the activator application step (a) of the glitter ink layer, the transferred object is pressed against the hydraulic transfer film floating on the water surface, and the glitter ink layer is brought into close contact with the transferred surface of the transferred object by water pressure.
- a decorative molded product was obtained through the step (b) and the film removal step (c) by washing with water. The obtained decorative molded product was observed visually, and its design property was evaluated according to the following criteria.
- composition of activator composition Phthalic acid-based alkyd resin 6 parts by weight Microsilica (pigment) 2 parts by weight Dibutyl phthalate 17 parts by weight Solvent (butyl carbitol acetate) 60 parts by weight Solvent (butyl cellosolve) 15 parts by weight
- ⁇ Corresponds to the uneven shape of the glitter ink layer As a result, it was possible to obtain an excellent glitter and a high-class feeling.
- delta Although the uneven
- Example 1A As a water-soluble film, a PVA film (thickness: 30 ⁇ m) is used, and a resin for forming the stretch-inhibiting resin layer described in Table 1A is gravure-coated at a coating amount of 3 g / m 2 on one side and stretched to a thickness of 1 ⁇ m. A suppression resin layer was provided. Next, glittering ink (shining pigment: aluminum paste, average particle size: 10 ⁇ m, binder resin: mixture of nitrocellulose resin and alkyd resin mixed at a mass ratio of 50:20) was applied at a coating amount of 2 g / m 2 . A gravure ink layer having a thickness of 1 ⁇ m was formed by gravure coating.
- embossing was performed from the surface side of the glittering ink layer at a pressure of 40 ton / m 2 and a temperature of 120 ° C. to form a concavo-convex shape having a depth of 20 ⁇ m to obtain a hydraulic transfer film.
- Table 1A shows the evaluation results of the moldability of the obtained hydraulic transfer film, the evaluation of the design properties of the decorative molded product obtained using the hydraulic transfer film, and the evaluation results of the transfer processability (followability). Show.
- Example 1A a hydraulic transfer film was obtained in the same manner as in Example 1A, except that the resin for forming the extension suppressing resin layer was changed to the resin shown in Table 1A.
- Table 1A shows the evaluation results of the moldability of the obtained hydraulic transfer film, the evaluation of the design properties of the decorative molded product obtained using the hydraulic transfer film, and the evaluation results of the transfer processability (followability). Show.
- Example 1A a hydraulic transfer film was obtained in the same manner as in Example 1A, except that the extension suppressing resin layer was not provided.
- Table 1A shows the evaluation results of the moldability of the obtained hydraulic transfer film, the evaluation of the design properties of the decorative molded product obtained using the hydraulic transfer film, and the evaluation results of the transfer processability (followability). Show.
- Tg in parentheses indicates glass transition temperature.
- 2A mixing ratio (mass ratio) of acrylic polyol resin and urethane resin is 80:20.
- 3A The mixing ratio (mass ratio) of nitrocellulose resin and alkyd resin is 20:10.
- 4A mixing ratio (mass ratio) of acrylic resin and vinyl chloride-vinyl acetate copolymer resin is 50:50.
- Example 7A In Example 3A, after the formation of the glitter ink layer, a mixture of nitrocellulose resin and alkyd resin (glass transition temperature Tg of nitrocellulose resin: 90 ° C., mixing ratio (mass ratio) of nitrocellulose resin and alkyd resin is 20:10) was gravure coated at a coating amount of 3 g / m 2 to provide a second stretch-inhibiting resin layer having a thickness of 1 ⁇ m. Then, using an embossing device, embossing is performed from the surface side of the second stretch-inhibiting resin layer at a pressure of 40 ton / m 2 and a temperature of 120 ° C.
- Example 1B As a water-soluble film, a PVA film (thickness 30 ⁇ m) is used, and glitter ink (brightness pigment: aluminum paste (type, etc.), average particle size: 10 ⁇ m, binder resin: nitrocellulose resin and alkyd resin on one side.
- the mixture obtained at a mass ratio of 50:20 was gravure coated at a coating amount of 2 g / m 2 to form a glittering ink layer having a thickness of 1 ⁇ m.
- the resin for forming the extension suppressing resin layer described in Table 1B was gravure coated at a coating amount of 3 g / m 2 to provide an extension suppressing resin layer having a thickness of 1 ⁇ m.
- embossing was performed from the surface side of the stretch-inhibiting resin layer at a pressure of 40 ton / m 2 and a temperature of 120 ° C. to form a concavo-convex shape having a depth of 20 ⁇ m to obtain a hydraulic transfer film.
- Table 1B shows the evaluation results of the formability of the obtained hydraulic transfer film, the evaluation of the design properties of the decorative molded product obtained using the hydraulic transfer film, and the evaluation results of the transfer processability (followability). Show.
- Example 1B a hydraulic transfer film was obtained in the same manner as in Example 1B, except that the resin forming the extension suppressing resin layer was changed to the resin shown in Table 1B.
- Table 1B shows the evaluation results of the formability of the obtained hydraulic transfer film, the evaluation of the design properties of the decorative molded product obtained using the hydraulic transfer film, and the evaluation results of the transfer processability (followability). Show.
- Example 1B a hydraulic transfer film was obtained in the same manner as in Example 1B, except that the extension suppressing resin layer was not provided and the glitter ink layer was embossed.
- Table 1B shows the evaluation results of the formability of the obtained hydraulic transfer film, the evaluation of the design properties of the decorative molded product obtained using the hydraulic transfer film, and the evaluation results of the transfer processability (followability). Show.
- Example 7B As a water-soluble film, a PVA film (thickness 30 ⁇ m) is used, and glitter ink (brightness pigment: aluminum paste (type, etc.), average particle size: 10 ⁇ m, binder resin: nitrocellulose resin and alkyd resin on one side. A glittering ink layer having a thickness of 1 ⁇ m and a solid printing with a gravure coat was formed at a coating amount of 2 g / m 2 . Next, the resin for forming the extension suppressing resin layer described in Table 2B is gravure coated at a coating amount of 3 g / m 2 , provided with an extension suppressing resin layer a having a thickness of 1 ⁇ m, and a nitrocellulose resin and an alkyd resin.
- the resin for forming the extension suppressing resin layer described in Table 2B is gravure coated at a coating amount of 3 g / m 2 , provided with an extension suppressing resin layer a having a thickness of 1 ⁇ m, and a nitrocellulose resin and
- Example 7B a hydraulic transfer film was obtained in the same manner as Example 7B, except that the resin for forming the extension suppressing resin layer a was changed to the resin shown in Table 2B.
- Table 2B shows the evaluation results of the moldability of the obtained hydraulic transfer film, the evaluation of the design of the decorative molded product obtained using the hydraulic transfer film, and the evaluation results of the transfer processability (followability). Show.
- the hydraulic transfer film of the present invention can provide a decorative molded product having a design with excellent luster and luxury.
- the obtained decorative molded product can be suitably used as a building material, automobile interior material, building material, furniture, electrical product housing, and the like.
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Abstract
Description
こうした装飾方法として、水圧を利用した水圧転写法が知られており、この水圧転写法は、立体面への転写加工性、クリア塗装感などの「深み」や、高品質な柄表現が出来るなどの意匠性の点で、優れた曲面加飾法であることが知られている。
ところで、近年の需要者の意匠性への要求が厳しくなっており、とりわけ金属調(金属光沢)の装飾において、光輝性の高さに加えて高級感が求められるようになっている。このような課題に対して、例えば、光輝性を発現する層とエンボス加工による凹凸形状とにより解決する手法、具体的には、水溶性フィルム上の硝化綿・アルキッド系の透明樹脂層と、該透明樹脂層上の蒸着金属層とからなり、該蒸着金属層と前記透明樹脂層との間で該透明樹脂層にエンボスが施された水圧転写シートが提案されている(特許文献1)。
本発明は、このような状況下で、光輝性インキ層を有し、水圧転写フィルムの製造時に凹凸形状が良好に賦型されており、かつ優れた光輝性と高級感とを備える意匠性を樹脂成形品に付与しうる水圧転写フィルム、及びその製造方法、ならびに該フィルムを用いた加飾成形品を提供することを課題とする。
前記積層体の前記水溶性フィルムとは反対側の面に凹凸形状を有し、
前記伸展抑制樹脂層を形成する樹脂が、ガラス転移温度80℃以上の樹脂Aを含む、水圧転写フィルム。
項2. 水溶性フィルム上に、前記伸展抑制樹脂層及び前記光輝性インキ層をこの順に有する項1に記載の水圧転写フィルム。
項3. 水溶性フィルム上に、前記光輝性インキ層及び前記伸展抑制樹脂層をこの順に有する項1に記載の水圧転写フィルム。
項4. 前記樹脂Aのガラス転移温度が、80~145℃である項1~3のいずれかに記載の水圧転写フィルム。
項5. 前記樹脂Aが、非水溶性樹脂である項1~4のいずれかに記載の水圧転写フィルム。
項6. 前記樹脂Aが、アクリル樹脂、アクリルポリオール樹脂、ニトロセルロース樹脂、及び塩化ビニル-酢酸ビニル共重合樹脂から選ばれる少なくとも一種である項1~5のいずれかに記載の水圧転写フィルム。
項7. 前記伸展抑制樹脂層を形成する樹脂中の前記樹脂Aの含有量が、50質量%以上である項1~6のいずれかに記載の水圧転写フィルム。
項8. 前記光輝性インキ層を形成する前記バインダー樹脂が、ニトロセルロース樹脂とアルキッド樹脂との混合物である項1~7のいずれかに記載の水圧転写フィルム。
項9. 前記伸展抑制層が、2層以上の複層構成である項3に記載の水圧転写フィルム。
項10. 前記複層構成の伸展抑制層のうち、最表面に位置する伸展抑制樹脂層を形成する樹脂が、アルキッド樹脂と前記樹脂Aとしてニトロセルロース樹脂とを含む項9に記載の水圧転写フィルム。
項11. 前記複層構成の伸展抑制層のうち、最表面に位置する伸展抑制層以外の伸展抑制樹脂層が、前記樹脂Aとしてアクリルポリオール樹脂を含む項9又は10に記載の水圧転写フィルム。
項12. 前記光輝性インキ層の前記伸展抑制樹脂層とは反対側に、前記樹脂Aを含む第2の伸展抑制樹脂層をさらに有する項2に記載の水圧転写フィルム。
項13. 前記第2の伸展抑制樹脂層が、アルキッド樹脂と前記樹脂Aとしてニトロセルロース樹脂とを含む項12に記載の水圧転写フィルム。
項14. 以下の工程を順に有する水圧転写フィルムの製造方法。
工程(1)水溶性フィルム上に、ガラス転移温度80℃以上の樹脂Aを含む樹脂組成物により形成される伸展抑制樹脂層と、光輝性顔料及びバインダー樹脂を含む光輝性インキ層とを積層する工程
工程(2)前記積層体の前記水溶性フィルムとは反対側の面からエンボス加工を施す工程
項15. 下記の工程(a)~(c)を順に有する加飾成形品の製造方法。
工程(a)請求項1~13のいずれかに記載の水圧転写フィルムを該水溶性フィルム側が水面側に向くように水面に浮遊させる前又は後に、前記水圧転写フィルムの前記水溶性フィルムとは反対側の面に活性剤組成物を塗布する活性剤塗布工程
工程(b)該工程(a)を経た、水面に浮遊している水圧転写フィルムの前記活性剤組成物を塗布した面に被転写体を押圧し、水圧によって前記水圧転写フィルムを被転写体の被転写面に密着させる工程
工程(c)該被転写体の被転写面に密着した水溶性フィルムを除去する脱膜工程
項16. 水溶性フィルム上に、伸展抑制樹脂層と、光輝性顔料及びバインダー樹脂を含む光輝性インキ層とを有する積層体からなり、
前記積層体の前記水溶性フィルムとは反対側の面に凹凸形状を有し、
前記伸展抑制樹脂層を形成する樹脂が、ガラス転移温度80℃以上の樹脂Aを含むフィルムの、水圧転写による被転写体の加飾のための使用。
以下、本発明を図面に基づいて説明する。図1、図3、及び図4は、本発明の水圧転写フィルムの構成の一例を示す概略断面図である。
本発明の水圧転写フィルム10は、水溶性フィルム11上に、伸展抑制樹脂層12と、光輝性顔料及びバインダー樹脂を含む光輝性インキ層13とを有する積層体からなり、当該積層体の水溶性フィルムとは反対側の面に凹凸形状を有し、伸展抑制樹脂層を形成する樹脂が、ガラス転移温度80℃以上の樹脂Aを含むことを特徴とする。
水溶性フィルムは、本発明の水圧転写フィルムにおいて基材の役割を有し、水圧転写後に加飾成形品を得る際に除去されるものである。水溶性フィルムとしては、水溶性又は水膨潤性を有するものであればよく、従来水圧転写フィルムとして一般に使用されている水溶性フィルムの中から、適宜選択して用いることができる。
水溶性フィルムを構成する樹脂としては、例えばポリビニルアルコール樹脂、デキストリン、ゼラチン、にかわ、カゼイン、セラック、アラビアゴム、澱粉、蛋白質、ポリアクリル酸アミド、ポリアクリル酸ナトリウム、ポリビニルメチルエーテル、メチルビニルエーテルと無水マレイン酸との共重合体、酢酸ビニルとイタコン酸との共重合体、ポリビニルピロリドン、アセチルセルロース、アセチルブチルセルロース、カルボキシメチルセルロース、メチルセルロース、ヒドロキシエチルセルロース、アルギン酸ナトリウムなどの各種水溶性ポリマーが挙げられる。これらの樹脂は、単独で用いられてもよいし、2種以上が混合されて用いられてもよい。なお、水溶性フィルムには、マンナン、キサンタンガム、グアーガムなどのゴム成分が添加されていてもよい。
ポリビニルアルコール樹脂フィルムは、ポリビニルアルコールの重合度、ケン化度、及び澱粉やゴムなどの添加剤の配合量などを変えることにより、水溶性フィルムに対して転写用の印刷層を形成する際に必要な機械的強度、取り扱い中の耐湿性、水面に浮かべてからの吸水による柔軟化の速度、水中での延展又は拡散に要する時間、転写工程での変形のし易さなどを適宜調節することができる。
また、ポリビニルアルコール樹脂フィルムは水溶性ではあるが、水に溶解する前段階では水に膨潤して軟化しつつもフィルムとして存続することが好ましい。フィルムとして存続している状態にあるときに水圧転写を行なうことにより、水圧転写時の転写用の印刷層の過度の流動、変形を防止することができるからである。
伸展抑制樹脂層は、水溶性フィルム上に設けられ、伸展抑制樹脂層を形成する樹脂として、ガラス転移温度80℃以上の樹脂Aを含むことを要する層である。伸展抑制樹脂層を設けることにより、水圧転写フィルムの製造時に凹凸形状が良好に賦型しうる賦型性が得られ、また水圧転写時に光輝性インキ層が伸展しすぎるのを抑制し、凹凸形状に対応する凹凸感発現部を形成して凹凸感を保持することで、光輝性と高級感とを備える意匠性(以後、単に意匠性と称する場合がある。)が得られる。なお、凹凸形状に対応する凹凸感発現部については、加飾成形品の製造方法についての説明において詳説する。
示差走査熱量計を用いて200℃まで昇温し、その温度から降温速度10℃/分で0℃まで冷却した試料を昇温速度10℃/分で測定した。軟化点より20℃以上低い温度でピークが観測される場合にはそのピークの温度を、また軟化点より20℃以上低い温度でピークが観測されずに段差が観測されるときは該段差部分の曲線の最大傾斜を示す接線と該段差の高温側のベースラインの延長線との交点の温度を、ガラス転移温度として読み取った。
また、樹脂Aとしては、水圧転写時に光輝性インキ層が過度に伸展することを抑制し、凹凸形状に対応する凹凸感発現部を良好に形成する観点から、非水溶性樹脂を用いることが好ましい。ここで、非水溶性樹脂は、一般に非水溶性を有する樹脂として知られる樹脂を称するものであり、具体的には、樹脂Aとして好ましく例示したものが挙げられる。
このような樹脂Bとしては、ポリエチレンやポリプロピレンなどのポリオレフィン樹脂、ウレタン樹脂、アセタール樹脂、アルキッド樹脂が好ましく挙げられ、ウレタン樹脂、アルキッド樹脂が好ましい。ガラス転移温度が低い樹脂Bを組み合わせることで、優れた転写加工性(追従性)が得られる。なかでも、樹脂Aとしてアクリルポリオール樹脂を用いる場合は、ウレタン樹脂と組み合わせることが好ましく、また樹脂Aとしてニトロセルロース樹脂を用いる場合は、アルキッド樹脂と組み合わせることが好ましい。
また、積層体Bの凹凸形状の幅は、10~100μmが好ましく、より好ましくは20~40μmである。凹凸形状の幅が上記範囲内であることにより、優れた賦型性や意匠性が得られる。ここで、本発明において、積層体Bの凹凸形状の幅は、凸部自体の幅のことである。
また、積層体Bにおいて、凹凸形状は、エンボス加工により好適に設けることができる。
光輝性インキ層は、光輝性を発現する層である。さらに、本発明の水圧転写フィルム10が上記の積層体Aの積層構造を有する場合には、光輝性を発現するとともに、少なくとも該光輝性インキ層の伸展抑制樹脂層とは反対側の面に凹凸形状を有することで高級感を発現させる層である。
また、積層体Aの凹凸形状の幅は、10~100μmが好ましく、より好ましくは20~40μmである。積層体Aの凹凸形状の幅が上記範囲内であることにより、優れた賦型性や意匠性が得られる。ここで、本発明において凹凸形状の幅は、凸部自体の幅のことである。
また、積層体Aの凹凸形状は、エンボス加工により好適に設けることができる。
バインダー樹脂としては、例えば熱可塑性樹脂が挙げられ、具体例としては、アクリル樹脂、アルキッド樹脂などのポリエステル樹脂、不飽和ポリエステル樹脂、ウレタン樹脂(例えばポリエステルウレタン樹脂)、ポリカーボネート樹脂、塩化ビニル-酢酸ビニル共重合樹脂、ポリビニルブチラールなどのポリビニルアセタール樹脂(ブチラール樹脂)、ニトロセルロース樹脂などが好ましく挙げられ、これらを単独で又は複数種を組み合わせて用いることができる。本発明においては、アルキッド樹脂、ニトロセルロース樹脂が好ましく、これらを混合して用いることがより好ましい。これらのバインダー樹脂を用いると、優れた賦型性が得られる。
金属顔料としては、金、銀、白金、パラジウム、ニッケル、銅、アルミニウム、クロム、真鍮、錫などの金属や合金、あるいはこれらの金属酸化物からなるものであり、光輝性が高く、安価である点からアルミニウム、真鍮などの鱗片状箔片からなる金属顔料が好ましい。また、パール顔料としては、酸化チタン又は酸化鉄で被覆された鱗片形状アルミナ顔料、酸化チタン又は酸化鉄で被覆された雲母顔料などが好ましく挙げられる。
本発明の水圧転写フィルムにおいて、積層体Aの積層構造を有する場合、水溶性フィルム11と光輝性インキ層13の間に設けられた伸展抑制樹脂層12とは別に、光輝性インキ層13の伸展抑制樹脂層12とは反対側にさらに第2の伸展抑制樹脂層15を備えていてもよい。第2の伸展抑制樹脂層15は、伸展抑制樹脂層12と同様に、ガラス転移温度80℃以上の樹脂Aを含む層として形成される。第2の伸展樹脂層15を備えることにより、加飾成形品にさらに優れた凹凸感を発現させることができる。なお、積層体Aにおいて、第2の伸展抑制樹脂層15を備える場合には、凹凸形状14は少なくとも、第2の伸展抑制樹脂層15から、光輝性インキ層13の伸展抑制樹脂層12とは反対側の面にかけて形成される。
本発明の水圧転写フィルムの製造方法は、工程(1)水溶性フィルム上に、ガラス転移温度80℃以上の樹脂Aを含む樹脂組成物により形成される伸展抑制樹脂層と、光輝性顔料及びバインダー樹脂を含む光輝性インキ層とを積層する工程、及び工程(2)前記積層体の前記水溶性フィルムとは反対側の面からエンボス加工を施す工程を順に有することを特徴とする。以下、本発明の水圧転写フィルムの製造方法を、上記の積層体Aの場合と、積層体Bの場合に分けて詳述する。
本発明の水圧転写フィルムが積層体Aの積層構造を有する場合、その製造方法は、工程(A)水溶性フィルム上に、ガラス転移温度80℃以上の樹脂Aを含む樹脂により形成される伸展抑制樹脂層を積層する工程、工程(B)該伸展抑制樹脂層上に光輝性インキ層を積層する工程、及び工程(C)該光輝性インキ層の該伸展抑制樹脂層の側とは反対側の面からエンボス加工を施し、少なくとも該光輝性インキ層の該反対側の面に凹凸形状を設ける工程を順に有することを特徴とするものである。
公知の塗布方法としては、グラビアコート、リバースコートなどが挙げられ、公知の印刷方法としては、グラビア印刷などが挙げられる。
ここで用いられるエンボス版としては、上記の凹凸形状の深さ、周期幅(ピッチ)、及び幅を達成できる寸法を具備するものであれば特に制限はない。通常、エンボス版の凹凸形状の深さは、10~80μm程度であり、好ましくは20~60μm、より好ましくは30~45μmである。
本発明の水圧転写フィルムが積層体Bの積層構造を有する場合、その製造方法は、工程(A)水溶性フィルム上に、光輝性インキ層を積層する工程、工程(B)該光輝性インキ層上に、ガラス転移温度80℃以上の樹脂Aを含む樹脂により形成される伸展抑制樹脂層を積層する工程、及び工程(C)該伸展抑制樹脂層の該光輝性インキ層の側とは反対側の面からエンボス加工を施し、少なくとも該伸展抑制樹脂層の該反対側の面に凹凸形状を設ける工程を順に有することを特徴とするものである。
公知の塗布方法としては、グラビアコート、リバースコートなどが挙げられ、公知の印刷方法としては、グラビア印刷などが挙げられる。
ここで用いられるエンボス版としては、上記の凹凸形状の深さ、周期幅(ピッチ)、及び幅を達成できる寸法を具備するものであれば特に制限はない。通常、エンボス版の凹凸形状の深さは、10~80μm程度であり、好ましくは20~60μm、より好ましくは30~45μmである。
本発明の加飾成形品の製造方法は、工程(a)上記の水圧転写フィルムを該水溶性フィルム側が水面側に向くように水面に浮遊させる前又は後に、水圧転写フィルムの水溶性フィルムとは反対側の面に活性剤組成物を塗布する活性剤塗布工程、工程(b)該工程(a)を経た、水面に浮遊している水圧転写フィルムの活性剤組成物を塗布した面に被転写体を押圧し、水圧によって水圧転写フィルムを被転写体の被転写面に密着させる工程、工程(c)該被転写体の被転写面に密着した水溶性フィルムを除去する脱膜工程を順に有することを特徴とする。
活性剤塗布工程(a)は、水圧転写フィルムを該水溶性フィルム側が水面側に向くように水面に浮遊させる前又は後に、前記水圧転写フィルムの前記水溶性フィルムとは反対側の面に活性剤組成物を塗布する工程である。
水圧転写フィルムとして上記の積層体Aの積層構造を有するものを用いる場合、活性剤塗布工程(a)は、水圧転写フィルムを水面に浮遊させる前又は後に、光輝性インキ層に活性剤組成物を塗布する工程である。この工程で、光輝性インキ層に活性剤を塗布することにより、該光輝性インキ層の表面が荒れ、被転写体と密着しやすくなる。
一方、水圧転写フィルムとして上記の積層体Bの積層構造を有するものを用いる場合、活性剤塗布工程(a)は、水圧転写フィルムを水面に浮遊させる前又は後に、伸展抑制樹脂層に活性剤組成物を塗布する工程である。この工程で、伸展抑制樹脂層に活性剤を塗布することにより、該伸展抑制樹脂層の表面が荒れ、被転写体と密着しやすくなる。
水圧転写フィルムは、水溶性フィルム側が水面側に向くように水面上に浮遊させる。水圧転写フィルムを水面に浮遊させるには、枚葉の印刷物を1枚ずつ浮遊させてもよく、また水を一方向に流し、その水面上に連続帯状の水圧転写フィルムを、連続的に供給して浮遊させてもよい。
アセチレングリコール類としては、メトキシブチルアセテート、エトキシブチルアセテート、エチルカルビトールアセテート、プロピルカルビトールアセテート、ブチルカルビトールアセテートなどが好ましく挙げられる。
エーテル類としては、メチルセロソルブ、ブチルセロソルブ、イソアミルセロソルブなどが好ましく挙げられる。
また、樹脂としては、アクリレート系単量体の単独又は共重合体などの熱可塑性樹脂や、ポリアミド樹脂、ポリエステル樹脂、フェノール樹脂、メラミン樹脂、尿素樹脂、エポキシ樹脂、フタル酸アルキッド樹脂、フタル酸ジアリル樹脂、アルキッド樹脂、ポリウレタン樹脂などの熱硬化性樹脂などが好ましく挙げられ、なかでも熱硬化性樹脂が好ましい。
工程(b)は、上記の工程(a)を経た、水面に浮遊している水圧転写フィルムの活性剤組成物を塗布した面に被転写体を押圧し、水圧によって前記水圧転写フィルムを被転写体の被転写面に密着させる工程である。
水圧転写フィルムとして上記の積層体Aの積層構造を有するものを用いる場合、工程(b)は、工程(a)を経た、水面に浮遊している水圧転写フィルム上に被転写体を押圧し、水圧によって光輝性インキ層を被転写体の被転写面に密着させる工程である。
一方、水圧転写フィルムとして上記の積層体Bの積層構造を有するものを用いる場合、工程(b)は、工程(a)を経た、水面に浮遊している水圧転写フィルム上に被転写体を押圧し、水圧によって伸展抑制樹脂層を被転写体の被転写面に密着させる工程である。
水圧転写フィルムを浮かべ水圧を印加するための水は、水溶性フィルムの種類などに応じ、適宣水温を調整するのがよく、好ましくは25~50℃程度、より好ましくは25~35℃である。
また、本発明の水圧転写フィルムと被転写体との転写時間は、20~120秒程度が好ましく、より好ましくは30~60秒程度である。ここで、転写時間とは、本発明の転写フィルムを水に浮遊させてから、被転写体への転写が完了するまでの時間のことである。
被転写体としては、例えば、ポリスチレン樹脂、アクリロニトリル-ブタジエン-スチレン共重合樹脂(ABS樹脂)、ポリカーボネート樹脂、メラミン樹脂、フェノール樹脂、尿素樹脂、繊維系樹脂、ポリエチレン、ポリプロピレンなどの樹脂、あるいはこれらを混合した樹脂のほか、鉄、アルミニウム、銅などの金属、陶磁器、ガラス、琺瑯などのセラミックス、木材などの材料からなる構造体を使用することができる。
脱膜工程(c)は、被転写体の被転写面に密着した水溶性フィルムを除去する工程である。
水溶性フィルムの除去は、例えば、水を用いてシャワー洗浄することで行うことができる。この工程(c)により、被転写面に付着している水溶性フィルムは除去される。なお、シャワー洗浄の条件は、水溶性フィルムを形成する材料などにより異なるが、通常は水温15~60℃程度、洗浄時間10秒~5分程度が好ましい。そして、工程(c)の後、被転写体を十分乾燥し水分を蒸発させれば、被転写体の被転写面に転写された光輝性インキ層と伸展抑制樹脂層とによって、所望の意匠が付与された樹脂成形品が得られる。
本発明の加飾成形品の製造方法は、工程(c)の後、さらに所望により、転写された伸展抑制樹脂層上に、トップコート層を形成する工程(d)を有することができる。
工程(d)において、前記工程(c)にて被転写体の被転写面に転写された伸展抑制樹脂層に対し、表面強度向上、表面保護、表面艶調整などのために、必要に応じてトップコート剤を塗布して、トップコート層を形成することができる。トップコート剤としては、例えば熱可塑性樹脂、熱硬化性樹脂、紫外線硬化性樹脂など、具体的にはウレタン樹脂、エポキシ樹脂、アクリル樹脂、フッ素樹脂、ケイ素樹脂などを含む樹脂組成物が好ましく挙げられる。
(1)賦型性の評価
各例における水圧転写フィルムの光輝性インキ層にエンボス加工(エンボス条件:温度120℃、圧力40ton/m2、プレス時間5分)を施して、エンボス版を剥がした後の、該光輝性インキ層の表面の様子を目視により観察し、下記の基準で評価した。
○:光輝性インキ層が剥がれることなく、凹凸形状が極めて良好に賦型されていた。
△:熱い状態では光輝性インキ層が若干剥がれるものの、室温まで冷やした後にエンボス版を剥がすと、光輝性インキ層は剥がれることなく、凹凸形状が実用にあたり問題が生じない程度に賦型されていた。
×:室温まで冷やした後にエンボス版を剥がしても、光輝性インキ層が剥がれてしまい、凹凸形状を賦型することができなかった。
(2)意匠性の評価
各例により得られた水圧転写フィルムの光輝性インキ層に、下記組成の活性剤組成物を3g/m2塗布し、スムージングロールで該活性剤組成物を均一にし、光輝性インキ層の活性剤塗布工程(a)を経た後、水面に浮遊している水圧転写フィルムに被転写体を押圧し、水圧によって光輝性インキ層を被転写体の被転写面に密着させる工程(b)、及び水洗による脱膜工程(c)を経て、加飾成形品を得た。得られた加飾成形品を目視により観察し、その意匠性について以下の基準で評価した。
(活性剤組成物の組成)
フタル酸系アルキッド樹脂 6質量部
マイクロシリカ(顔料) 2質量部
フタル酸ジブチル 17質量部
溶剤(ブチルカルビトールアセテート) 60質量部
溶剤(ブチルセロソルブ) 15質量部
○:光輝性インキ層の凹凸形状に対応する凹凸感が良好に保持されており、優れた光輝性と高級感が得られた。
△:光輝性インキ層の凹凸形状に対応する凹凸感がやや低下したものの十分視認でき、実用にあたり問題が生じない程度の光輝性と高級感が得られた。
×:光輝性インキ層の凹凸形状に対応する凹凸感が消失したため、光輝性と高級感とが得られない、または水圧転写フィルムの製造の時点で凹凸形状を賦型できなかった。
(3)転写加工性(追従性)の評価
加飾成形品の製造において、被転写体として、直径35mm、長さ250mmの円柱形状の樹脂成形体を用い、その側面に水圧転写フィルムを転写させた際の水圧転写フィルムの転写加工性(追従性)について、目視による観察により、以下の基準で評価した。
◎:被転写体に良好に追従し、割れを一切生じることなく加飾成形品が得られた。
○:水圧転写フィルムの伸展性が若干悪く、割れや付き回り性に若干劣るものの、意匠性にほとんど影響を与えることなく転写加工を行うことができた。
△:水圧転写フィルムの伸展性が若干悪く、割れや付き回り性に劣るものの、意匠感への影響は実用にあたり問題が生じない程度のものであった。
×:水圧転写フィルムの伸展性が悪く、割れが著しい加飾成形品となった、あるいは水圧転写時に水圧転写フィルムが割れるなどして被転写体に転写することができなかった。
水溶性フィルムとして、PVAフィルム(厚さ30μm)を用い、その片面に第1A表に記載の伸展抑制樹脂層を形成する樹脂を塗布量3g/m2で、グラビアコートし、厚さ1μmの伸展抑制樹脂層を設けた。次に、光輝性インキ(光輝性顔料:アルミペースト,平均粒径:10μm,バインダー樹脂:ニトロセルロース樹脂とアルキッド樹脂とを質量比50:20で混合した混合物)を、塗布量2g/m2でグラビアコートして、厚さ1μmの光輝性インキ層を形成した。次いで、エンボス加工装置を用いて、圧力40ton/m2、温度120℃で光輝性インキ層の表面側からエンボス加工して、深さ20μmの凹凸形状を形成して水圧転写フィルムを得た。得られた水圧転写フィルムについての賦型性の評価、該水圧転写フィルムを用いて得られた加飾成形品の意匠性の評価、及び転写加工性(追従性)の評価結果を第1A表に示す。
実施例1Aにおいて、伸展抑制樹脂層を形成する樹脂を第1A表に示される樹脂とした以外は、実施例1Aと同様にして水圧転写フィルムを得た。得られた水圧転写フィルムについての賦型性の評価、該水圧転写フィルムを用いて得られた加飾成形品の意匠性の評価、及び転写加工性(追従性)の評価結果を第1A表に示す。
実施例1Aにおいて、伸展抑制樹脂層を設けなかったこと以外は、実施例1Aと同様にして水圧転写フィルムを得た。得られた水圧転写フィルムについての賦型性の評価、該水圧転写フィルムを用いて得られた加飾成形品の意匠性の評価、及び転写加工性(追従性)の評価結果を第1A表に示す。
*2A,アクリルポリオール樹脂とウレタン樹脂との混合比(質量比)は80:20である。
*3A,ニトロセルロース樹脂とアルキッド樹脂との混合比(質量比)は20:10である。
*4A,アクリル樹脂と塩化ビニル-酢酸ビニル共重合樹脂との混合比(質量比)は50:50である。
実施例3Aにおいて、光輝性インキ層の形成後、ニトロセルロース樹脂とアルキッド樹脂との混合物(ニトロセルロース樹脂のガラス転移温度Tg:90℃、ニトロセルロース樹脂とアルキッド樹脂との混合比(質量比)は20:10)を、塗布量3g/m2でグラビアコートし、厚さ1μmの第2の伸展抑制樹脂層を設けた。次いで、エンボス加工装置を用いて、圧力40ton/m2、温度120℃で第2の伸展抑制樹脂層の表面側からエンボス加工して、深さ20μmの凹凸形状を形成して水圧転写フィルムを得た。
得られた水圧転写フィルムのエンボス加工面を観察したところ、実施例1A~6Aで得られた水圧転写フィルム以上に、エンボス版の凹凸形状が良好に賦型されていた。さらにこの水圧転写フィルムを用いて加飾成形品を製造したところ、実施例1A~6Aの場合以上に良好な意匠感が得られ、また転写加工性(追従性)も同等以上であった。
水溶性フィルムとして、PVAフィルム(厚さ30μm)を用い、その片面に光輝性インキ(光輝性顔料:アルミペースト(種類など),平均粒径:10μm,バインダー樹脂:ニトロセルロース樹脂とアルキッド樹脂とを質量比50:20で混合した混合物)を、塗布量2g/m2でグラビアコートして、厚さ1μmの光輝性インキ層を形成した。次に、第1B表に記載の伸展抑制樹脂層を形成する樹脂を塗布量3g/m2で、グラビアコートし、厚さ1μmの伸展抑制樹脂層を設けた。次いで、エンボス加工装置を用いて、圧力40ton/m2、温度120℃で伸展抑制樹脂層の表面側からエンボス加工して、深さ20μmの凹凸形状を形成して水圧転写フィルムを得た。得られた水圧転写フィルムについての賦型性の評価、該水圧転写フィルムを用いて得られた加飾成形品の意匠性の評価、及び転写加工性(追従性)の評価結果を第1B表に示す。
実施例1Bにおいて、伸展抑制樹脂層を形成する樹脂を第1B表に示される樹脂とした以外は、実施例1Bと同様にして水圧転写フィルムを得た。得られた水圧転写フィルムについての賦型性の評価、該水圧転写フィルムを用いて得られた加飾成形品の意匠性の評価、及び転写加工性(追従性)の評価結果を第1B表に示す。
実施例1Bにおいて、伸展抑制樹脂層を設けず、光輝性インキ層にエンボス加工を施した以外は、実施例1Bと同様にして水圧転写フィルムを得た。得られた水圧転写フィルムについての賦型性の評価、該水圧転写フィルムを用いて得られた加飾成形品の意匠性の評価、及び転写加工性(追従性)の評価結果を第1B表に示す。
*2B,アクリルポリオール樹脂とウレタン樹脂との混合比(質量比)は80:20である。
*3B,ニトロセルロース樹脂とアルキッド樹脂との混合比(質量比)は20:10である。
*4B,アクリル樹脂と塩化ビニル-酢酸ビニル共重合樹脂との混合比(質量比)は50:50である。
水溶性フィルムとして、PVAフィルム(厚さ30μm)を用い、その片面に光輝性インキ(光輝性顔料:アルミペースト(種類など),平均粒径:10μm,バインダー樹脂:ニトロセルロース樹脂とアルキッド樹脂とを質量比50:20で混合した混合物)を、塗布量2g/m2で、グラビアコートでベタ印刷を有する、厚さ1μmの光輝性インキ層を形成した。次に、第2B表に記載の伸展抑制樹脂層を形成する樹脂を塗布量3g/m2で、グラビアコートし、厚さ1μmの伸展抑制樹脂層aを設け、さらにニトロセルロース樹脂とアルキッド樹脂との混合物(ニトロセルロース樹脂のガラス転移温度Tg:90℃,ニトロセルロース樹脂とアルキッド樹脂との混合比(質量比)は20:10である。)を塗布量3g/m2で、グラビアコートし、厚さ1μmの伸展抑制樹脂層bを設けた。次いで、エンボス加工装置を用いて、圧力40ton/m2、温度120℃で伸展抑制樹脂層の表面側からエンボス加工して、深さ20μmの凹凸形状を形成して水圧転写フィルムを得た。得られた水圧転写フィルムについての賦型性の評価、該水圧転写フィルムを用いて得られた加飾成形品の意匠性の評価、及び転写加工性(追従性)の評価結果を第2B表に示す。
実施例7Bにおいて、伸展抑制樹脂層aを形成する樹脂を第2B表に示される樹脂とした以外は、実施例7Bと同様にして水圧転写フィルムを得た。得られた水圧転写フィルムについての賦型性の評価、該水圧転写フィルムを用いて得られた加飾成形品の意匠性の評価、及び転写加工性(追従性)の評価結果を第2B表に示す。
11 水溶性フィルム
12 伸展抑制樹脂層
12a 伸展抑制樹脂層a
12b 伸展抑制樹脂層b
13 光輝性インキ層
14 凹凸形状
15 第2の伸展樹脂層
20 加飾成形品
21 被転写体
22 トップコート層
23 凹凸感発現部
Claims (15)
- 水溶性フィルム上に、伸展抑制樹脂層と、光輝性顔料及びバインダー樹脂を含む光輝性インキ層とを有する積層体からなり、
前記積層体の前記水溶性フィルムとは反対側の面に凹凸形状を有し、
前記伸展抑制樹脂層を形成する樹脂が、ガラス転移温度80℃以上の樹脂Aを含む、水圧転写フィルム。 - 水溶性フィルム上に、前記伸展抑制樹脂層及び前記光輝性インキ層をこの順に有する請求項1に記載の水圧転写フィルム。
- 水溶性フィルム上に、前記光輝性インキ層及び前記伸展抑制樹脂層をこの順に有する請求項1に記載の水圧転写フィルム。
- 前記樹脂Aのガラス転移温度が、80~145℃である請求項1~3のいずれかに記載の水圧転写フィルム。
- 前記樹脂Aが、非水溶性樹脂である請求項1~4のいずれかに記載の水圧転写フィルム。
- 前記樹脂Aが、アクリル樹脂、アクリルポリオール樹脂、ニトロセルロース樹脂、及び塩化ビニル-酢酸ビニル共重合樹脂から選ばれる少なくとも一種である請求項1~5のいずれかに記載の水圧転写フィルム。
- 前記伸展抑制樹脂層を形成する樹脂中の前記樹脂Aの含有量が、50質量%以上である請求項1~6のいずれかに記載の水圧転写フィルム。
- 前記光輝性インキ層を形成する前記バインダー樹脂が、ニトロセルロース樹脂とアルキッド樹脂との混合物である請求項1~7のいずれかに記載の水圧転写フィルム。
- 前記伸展抑制層が、2層以上の複層構成である請求項3に記載の水圧転写フィルム。
- 前記複層構成の伸展抑制層のうち、最表面に位置する伸展抑制樹脂層を形成する樹脂が、アルキッド樹脂と前記樹脂Aとしてニトロセルロース樹脂とを含む請求項9に記載の水圧転写フィルム。
- 前記複層構成の伸展抑制層のうち、最表面に位置する伸展抑制層以外の伸展抑制樹脂層が、前記樹脂Aとしてアクリルポリオール樹脂を含む請求項9又は10に記載の水圧転写フィルム。
- 前記光輝性インキ層の前記伸展抑制樹脂層とは反対側に、前記樹脂Aを含む第2の伸展抑制樹脂層をさらに有する請求項2に記載の水圧転写フィルム。
- 前記第2の伸展抑制樹脂層が、アルキッド樹脂と前記樹脂Aとしてニトロセルロース樹脂とを含む請求項12に記載の水圧転写フィルム。
- 以下の工程(1)及び(2)を順に有する水圧転写フィルムの製造方法。
工程(1)水溶性フィルム上に、ガラス転移温度80℃以上の樹脂Aを含む樹脂組成物により形成される伸展抑制樹脂層と、光輝性顔料及びバインダー樹脂を含む光輝性インキ層とを積層する工程
工程(2)前記積層体の前記水溶性フィルムとは反対側の面からエンボス加工を施す工程 - 下記の工程(a)~(c)を順に有する加飾成形品の製造方法。
工程(a)請求項1~13のいずれかに記載の水圧転写フィルムを該水溶性フィルム側が水面側に向くように水面に浮遊させる前又は後に、前記水圧転写フィルムの前記水溶性フィルムとは反対側の面に活性剤組成物を塗布する活性剤塗布工程
工程(b)該工程(a)を経た、水面に浮遊している水圧転写フィルムの前記活性剤組成物を塗布した面に被転写体を押圧し、水圧によって前記水圧転写フィルムを被転写体の被転写面に密着させる工程
工程(c)該被転写体の被転写面に密着した水溶性フィルムを除去する脱膜工程
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