JP5240358B2 - Irregular decorative injection molded product - Google Patents

Irregular decorative injection molded product Download PDF

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JP5240358B2
JP5240358B2 JP2011290009A JP2011290009A JP5240358B2 JP 5240358 B2 JP5240358 B2 JP 5240358B2 JP 2011290009 A JP2011290009 A JP 2011290009A JP 2011290009 A JP2011290009 A JP 2011290009A JP 5240358 B2 JP5240358 B2 JP 5240358B2
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浩之 阿竹
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Dai Nippon Printing Co Ltd
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本発明は、表面及び内面の双方に凹凸模様が付与された、凹凸加飾射出成形品に関するものである。   The present invention relates to a concavo-convex decorative injection molded product having a concavo-convex pattern on both the surface and the inner surface.

樹脂成形物の表面側に被着体として加飾シートを積層一体化することで加飾した射出成形品が各種用途で使用されている。これらの射出成形品の装飾性を高めるため、木目導管溝等の凹凸模様を設けて立体意匠感を付与することが広く行なわれている。
この凹凸模様を設ける方法として、電離放射線硬化性樹脂又は熱硬化性樹脂の基材フィルムに熱圧を加えるエンボス加工を施して凹凸模様を賦形した加飾シートを製造し、それを射出成形品の内部凹凸模様形成に用いる方法が知られている。(例えば、特許文献1参照)
また、硬化性樹脂を基材フィルムに塗工した後、硬化せしめて凹凸模様を賦形した凹凸フィルムを用いて射出成形品の表面に凹凸模様を設ける方法も提案されている。(例えば、特許文献2及び3参照)
しかしながら、硬化性樹脂を塗工した基材フィルムの外側表面に凹凸模様を賦形した加飾シートを射出成形に用いる場合は、硬化性樹脂の硬化度が低過ぎると真空成形工程にて加飾シートを予備成形する時の熱圧及びその後の射出成形工程での熱圧によって、エンボスされた凹凸模様の凹凸形状が消失し易く、また高過ぎると、凹凸模様に歪みや亀裂等が生じ易く、真空成形工程や射出成形工程の作業性も悪くなるという問題があった。
さらに、加飾シートの両面にエンボス加工するためには、金属−金属のロールでニップが必要となるが加飾シートの厚みは、100〜150μm程度のものが多く、150℃以上、例えば170℃の温度での隙間制御が難しい。そして、加飾シートの厚みを厚くすると、熱容量の関係でエンボスされた凹凸模様が入らなくなることがあり、また、真空成形時の必要温度が高くなりエンボスされた凹凸模様が消失するという問題があった。
このように、現状では、基材フィルムの外側表面及び内面の双方に凹凸模様を形成した射出成形品を得ることは困難であり、凹凸模様の立体意匠感は未だ充分とはいえなかった。
Injection molded products decorated by stacking and integrating decorative sheets as adherends on the surface side of resin molded products are used in various applications. In order to enhance the decorativeness of these injection molded products, it is widely performed to provide a three-dimensional design feeling by providing an uneven pattern such as a wood grain conduit groove.
As a method of providing this concavo-convex pattern, an embossing process that applies heat pressure to an ionizing radiation curable resin or a thermosetting resin base film is manufactured to produce a decorative sheet having a concavo-convex pattern, which is then injection-molded. A method used for forming an internal concavo-convex pattern is known. (For example, see Patent Document 1)
There has also been proposed a method of providing a concavo-convex pattern on the surface of an injection-molded product using a concavo-convex film obtained by applying a curable resin to a base film and then curing it to form a concavo-convex pattern. (For example, see Patent Documents 2 and 3)
However, when a decorative sheet with a concavo-convex pattern formed on the outer surface of a base film coated with a curable resin is used for injection molding, if the degree of cure of the curable resin is too low, it is decorated in a vacuum forming process. Due to the heat pressure when preforming the sheet and the heat pressure in the subsequent injection molding process, the uneven shape of the embossed uneven pattern tends to disappear, and if it is too high, the uneven pattern is likely to be distorted or cracked, There was a problem that the workability of the vacuum molding process and the injection molding process also deteriorated.
Furthermore, in order to emboss both surfaces of the decorative sheet, a nip is required with a metal-metal roll, but the thickness of the decorative sheet is often about 100 to 150 μm, and is 150 ° C. or higher, for example, 170 ° C. It is difficult to control the gap at a certain temperature. When the thickness of the decorative sheet is increased, the embossed uneven pattern may not enter due to the heat capacity, and the embossed uneven pattern disappears due to an increase in the required temperature during vacuum forming. It was.
Thus, at present, it is difficult to obtain an injection-molded product in which a concavo-convex pattern is formed on both the outer surface and the inner surface of the base film, and the three-dimensional design feeling of the concavo-convex pattern has not been sufficient.

特開平7−32548号公報Japanese Patent Laid-Open No. 7-32548 特開平7−32476号公報JP 7-32476 A 特開2002−240078号公報Japanese Patent Laid-Open No. 2002-240078

本発明は、このような状況下で、複合的な凹凸模様が形成され、より高級感のある立体意匠性が付与された射出成形品を提供することを課題とするものである。   Under such circumstances, an object of the present invention is to provide an injection-molded product in which a complex concavo-convex pattern is formed and a higher-grade three-dimensional design is imparted.

本発明者は、前記課題を達成するために鋭意研究を重ねた結果、射出成形品の表面及び内面の双方に凹凸模様を付与することにより、前記課題を解決し得ることを見出した。本発明は、かかる知見に基づいて完成したものである。
すなわち、本発明の要旨は下記のとおりである。
1.透明又は半透明の樹脂フィルムからなる表面保護層と、前記表面保護層の内側に積層された着色層と、前記着色層の内側に積層された接着剤層と、射出樹脂層とを有する射出成形品であって、前記表面保護層の表面ならびに前記着色層及び前記接着剤層が凹凸模様を有し、前記表面保護層の表面は100〜1000μmの深さでシボ加工された射出成形金型のキャビティ面に対応する凹凸模様を有し、前記着色層及び前記接着剤層は40〜60μmのエンボス深さを有する凹凸模様を有することを特徴とする凹凸加飾射出成形品。
.前記接着剤層に接する前記射出樹脂層の面が、前記接着剤層の凹部に対応する凸部を有することを特徴とする上記1に記載の凹凸加飾射出成形品。
.前記着色層が光反射層を有する上記1又は2に記載の凹凸加飾射出成形品。
.前記着色層が絵柄印刷層及び/又は着色ベタ層を有する上記1〜3のいずれか1項に記載の凹凸加飾射出成形品。
.透明又は半透明の樹脂フィルムからなる表面保護層、着色層、接着剤層の順に有する加飾シートに、前記接着剤層側からエンボス加工を行い、40〜60μmのエンボス深さを有する凹凸模様を付与した後、100〜1000μmのシボ深さでシボ加工されて凹凸形状をキャビティ面に有する金型と前記表面保護層とが接するように設置して前記接着剤層側へと樹脂を射出し、前記金型の凹凸形状を前記表面保護層に転写すると共に加飾シートに射出樹脂層を積層させることを特徴とする凹凸加飾射出成形品の製造方法。
As a result of intensive studies to achieve the above-mentioned problems, the present inventor has found that the above-mentioned problems can be solved by imparting a concavo-convex pattern to both the surface and the inner surface of an injection molded product. The present invention has been completed based on such findings.
That is, the gist of the present invention is as follows.
1. Injection molding comprising a surface protective layer made of a transparent or translucent resin film, a colored layer laminated inside the surface protective layer, an adhesive layer laminated inside the colored layer, and an injection resin layer The surface of the surface protective layer, the colored layer, and the adhesive layer have a concavo-convex pattern, and the surface of the surface protective layer is an injection mold that is textured at a depth of 100 to 1000 μm. have a concavo-convex pattern corresponding to the cavity surface, the colored layer and the adhesive layer is uneven decorative injection-molded article, characterized by have a rugged pattern having an embossed depth of 40 to 60 [mu] m.
2 . 2. The concavo-convex decorative injection-molded product according to 1 above , wherein the surface of the injection resin layer in contact with the adhesive layer has a convex portion corresponding to the concave portion of the adhesive layer.
3 . 3. The uneven decorative injection molded product according to 1 or 2 above, wherein the colored layer has a light reflecting layer.
4 . 4. The uneven decorative injection molded product according to any one of 1 to 3 , wherein the colored layer has a pattern printing layer and / or a colored solid layer.
5 . A decorative sheet having a surface protective layer, a colored layer, and an adhesive layer in the order of a transparent or translucent resin film is embossed from the adhesive layer side , and has an uneven pattern having an emboss depth of 40 to 60 μm. After being applied, the resin is injected into the adhesive layer side by placing it so that the surface protection layer is in contact with the mold having a concave and convex shape on the cavity surface that is textured at a texture depth of 100 to 1000 μm, A method for producing a concavo-convex decorative injection-molded product, wherein the concavo-convex shape of the mold is transferred to the surface protective layer and an injection resin layer is laminated on a decorative sheet.

本発明によれば、複合的な凹凸模様が形成され、より高級感のある立体意匠性が付与された射出成形品を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the composite uneven | corrugated pattern is formed and the injection molded product to which the three-dimensional design property with a high-class feeling was provided can be provided.

以下、本発明を、図面を参照しながら説明する。図1は、本発明の凹凸加飾射出成形品の断面模式図である。
図1にあるように、本発明の凹凸加飾射出成形品1は、表面側から、表面保護層11、着色層12、接着剤層13及び射出樹脂層20の順に積層されている。これらの内、表面保護層11、着色層12及び接着剤層13から加飾シート10が構成されている。
表面保護層11の表面側から見た凸部111及び凹部112からなる凹凸模様Aが付与されており、着色層12及び接着剤層13にも着色層の表面側から見た凸部121及び凹部122ならびに接着剤層の表面側から見た凸部131及び凹部132からなる凹凸模様Bが付与されている。これら凹凸模様A及びBが複合的に凹凸模様に深みを与え、高級感あふれる立体的意匠性を現出させる。
図2は、本発明の凹凸加飾射出成形品1の平面模式図である。
凹凸加飾射出成形品1の表面保護層11の表面側から見た凸部111と着色層12の表面側から見た凸部121とが複合的に組み合わされている。この組み合わせは、これに限らず、凹凸模様Aを構成する凸部111及び/又は凹部112と、凹凸模様Bを構成する凸部121及び/又は凹部122とが複合的に組み合わさればよい。
Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view of an uneven decorative injection molded product of the present invention.
As shown in FIG. 1, the uneven decorative injection molded product 1 of the present invention is laminated in the order of a surface protective layer 11, a colored layer 12, an adhesive layer 13 and an injection resin layer 20 from the surface side. Among these, the decorative sheet 10 is composed of the surface protective layer 11, the colored layer 12 and the adhesive layer 13.
The concave / convex pattern A including the convex portions 111 and the concave portions 112 viewed from the surface side of the surface protective layer 11 is given, and the convex portions 121 and the concave portions viewed from the surface side of the colored layer are also provided to the colored layer 12 and the adhesive layer 13. 122 and a concavo-convex pattern B including a convex portion 131 and a concave portion 132 viewed from the surface side of the adhesive layer is provided. These concavo-convex patterns A and B give depth to the concavo-convex pattern in a composite manner, and reveal a three-dimensional design with a high-class feeling.
FIG. 2 is a schematic plan view of the uneven decorative injection molded product 1 of the present invention.
The convex part 111 seen from the surface side of the surface protective layer 11 of the uneven decorative injection molded product 1 and the convex part 121 seen from the surface side of the colored layer 12 are combined in combination. This combination is not limited to this, and the convex portion 111 and / or the concave portion 112 constituting the concavo-convex pattern A and the convex portion 121 and / or the concave portion 122 constituting the concavo-convex pattern B may be combined.

図3は、本発明で利用する射出成形方法の一形態(サーモジェクト成形)を説明する概念図である。射出成形金型は、射出成形金型(雄型)31と吸射出成形金型(雌型)32とからなっている。真空成形工程において、加飾シート10を所定温度に加熱し、シートクランプ35により吸射出成形金型(雌型)32に押圧固定した後、吸引孔33から真空吸引して所定の型付けを完了する。その直後の射出成形工程において、射出樹脂34を射出成形金型内に射出し、射出樹脂層20を形成する。射出成形完了し、冷却した後、射出成形金型から凹凸加飾射出成形品1を取り出す。
本発明の凹凸加飾射出成形品1の表面保護層11の表面に凹凸模様Aを付与するためには、射出成形時の真空成形工程及び射出成形工程で、シボ加工された吸射出成形金型(雌型)32のキャビティ面の凹凸を表面保護層11に熱圧下転写すればよい。ここで、シボ加工とは、金属の表面に模様を付ける金属微細加工法のひとつであり、主に薬品によって金属を溶解するため、化学腐食(エッチング)ともいう。
金型の正面部36の表面シボ深さは、通常5〜1,000μm程度であるが、深くする場合は、例えば100〜1,000μm程度とすることができる。
FIG. 3 is a conceptual diagram illustrating one form (thermoject molding) of the injection molding method used in the present invention. The injection mold is composed of an injection mold (male mold) 31 and a suction injection mold (female mold) 32. In the vacuum forming step, the decorative sheet 10 is heated to a predetermined temperature, pressed and fixed to the suction injection mold (female mold) 32 by the sheet clamp 35, and then vacuum suction is performed from the suction hole 33 to complete the predetermined molding. . In the injection molding process immediately after that, the injection resin 34 is injected into the injection mold to form the injection resin layer 20. After the injection molding is completed and cooled, the concavo-convex decorative injection molded product 1 is taken out from the injection mold.
In order to give the concavo-convex pattern A to the surface of the surface protective layer 11 of the concavo-convex decorative injection-molded product 1 of the present invention, a suction-injection mold that has been embossed in the vacuum molding process and the injection molding process during injection molding. The irregularities on the cavity surface of the (female mold) 32 may be transferred to the surface protective layer 11 under hot pressure. Here, the texture processing is one of metal fine processing methods for forming a pattern on the surface of the metal, and is also called chemical corrosion (etching) because the metal is mainly dissolved by a chemical.
The surface embossing depth of the front portion 36 of the mold is usually about 5 to 1,000 μm. However, when the depth is made deep, it can be set to about 100 to 1,000 μm, for example.

本発明においては、金型のシボ加工に限られず、金型のブラスト加工、スクラッチ(傷つけ)加工等により射出成形金型(雌型)32の表面に凹凸模様Aを付与してもよい。目的とする凹凸模様を精密に加工できる点で、シボ加工が好ましい。   In the present invention, the concavo-convex pattern A may be imparted to the surface of the injection mold (female mold) 32 by blasting the mold, scratching (scratching), etc. The embossing is preferable in that the target uneven pattern can be precisely processed.

また、本発明の凹凸加飾射出成形品1に用いられる加飾シート10の着色層12及び接着剤層13の凹凸模様Bは、射出成形前に、予め表面保護層11に裏面からエンボス加工することにより付与することができる。エンボス加工は、従来公知の熱プレス方式の枚葉又は輪転式エンボス機を用いて、加熱軟化させた加飾シート10の表面保護層11の裏面側にエンボス版を押圧して形成すればよい。
エンボス加工は、通常、表面保護層11の裏面側に凹凸模様Bが適切に付与されるように深さを調整して行なわれる。エンボス深さは、凹凸加飾射出成形品において40〜60μmであることが好ましい。
Moreover, the uneven | corrugated pattern B of the colored layer 12 of the decorating sheet 10 and the adhesive bond layer 13 used for the uneven | corrugated decorative injection molded product 1 of this invention is embossed from the back surface to the surface protective layer 11 previously before injection molding. It can be given by. The embossing may be formed by pressing the embossed plate on the back surface side of the surface protective layer 11 of the decorative sheet 10 that has been heat-softened using a conventionally known hot-press type single-wafer or rotary embossing machine.
The embossing is usually performed by adjusting the depth so that the concavo-convex pattern B is appropriately provided on the back surface side of the surface protective layer 11. The embossing depth is preferably 40 to 60 μm in the uneven injection molded product.

本発明の凹凸加飾射出成形品1の表面保護層11として、透明又は半透明の樹脂フィルムが用いられる。樹脂フィルムとしては、透明性に優れ、その結果、優れた塗装感も付与できるアクリル樹脂フィルムやポリカーボネート樹脂フィルム等が好ましい。この樹脂フィルムの厚さは、好ましくは20〜500μm程度であり、より好ましくは50〜150μm程度である。
樹脂フィルムに用いられるアクリル樹脂としては、例えば、ポリメチル(メタ)アクリレート、ポリエチル(メタ)アクリレート、ポリブチル(メタ)アクリレート、メチル(メタ)アクリレート−ブチル(メタ)アクリレート共重合体、メチル(メタ)アクリレート−スチレン共重合体等のアクリル樹脂〔但し、(メタ)アクリレートとは、アクリレート又はメタクリレートをいう〕を単体又は2種以上の混合物として、単層又は2層以上の積層体のフィルムとして用いる。なお、表面保護層11は半透明であってもよいが、透明であることが着色層12の着色を鮮やかにして好ましい。透明である場合は、無色透明の他に、着色透明でもよい。また、表面保護層11の樹脂フィルム中には、必要に応じて、適宜、上述の艶消し剤、ポリエチレンワックス、パラフィンワックス等の滑剤、ベンゾトリアゾール系、ベンゾフェノン系、微粒子酸化セリウム系等の紫外線吸収剤、ヒンダードアミン系ラジカル捕捉剤等の光安定剤、可塑剤、安定剤、着色剤等の各種添加剤を、物性調整の為に添加してもよい。
As the surface protective layer 11 of the uneven decorative injection molded product 1 of the present invention, a transparent or translucent resin film is used. As the resin film, an acrylic resin film, a polycarbonate resin film, or the like that is excellent in transparency and, as a result, can impart an excellent coating feeling is preferable. The thickness of the resin film is preferably about 20 to 500 μm, more preferably about 50 to 150 μm.
Examples of the acrylic resin used for the resin film include polymethyl (meth) acrylate, polyethyl (meth) acrylate, polybutyl (meth) acrylate, methyl (meth) acrylate-butyl (meth) acrylate copolymer, and methyl (meth) acrylate. -Acrylic resin such as styrene copolymer [wherein (meth) acrylate means acrylate or methacrylate] is used as a single layer or a mixture of two or more types as a film of a single layer or a laminate of two or more layers. The surface protective layer 11 may be translucent, but it is preferable that the surface protective layer 11 is transparent to make the coloring layer 12 vividly colored. When it is transparent, it may be colored and transparent in addition to colorless and transparent. Further, in the resin film of the surface protective layer 11, if necessary, UV absorbers such as the above-mentioned matting agent, polyethylene wax, paraffin wax, and the like, benzotriazole-based, benzophenone-based, fine particle cerium oxide-based, etc. Various additives such as a light stabilizer such as an agent and a hindered amine radical scavenger, a plasticizer, a stabilizer and a colorant may be added to adjust the physical properties.

本発明の凹凸加飾射出成形品1の着色層12は、光反射層を有することが好ましい。光反射層としては、例えば、樹脂フィルムの裏面に金属(アルミニウム、クロム、銀等)を蒸着して全面あるいは部分的に形成した金属薄膜層、あるいは裏面に反射率が優れた白色塗膜又は金属光沢塗膜を有する樹脂フィルム等が挙げられる。光反射層が着色層の全面に形成される場合はベタ反射層となり、着色層の部分的に形成される場合は絵柄層となる。
また、本発明に係る着色層12は、光反射層に加えて、又は光反射層の代わりに、絵柄印刷層及び/又は着色ベタ層を有していてもよい。さらに、所望により、着色層12が、磁性体層、導電性層等の機能性層等を有していてもよい。磁性体層には磁性体が含まれ、導電性層には導電性材料が含まれる。
The colored layer 12 of the uneven decorative injection molded product 1 of the present invention preferably has a light reflecting layer. As the light reflection layer, for example, a metal thin film layer formed by depositing metal (aluminum, chromium, silver, etc.) on the back surface of the resin film, or a white coating film or metal having excellent reflectivity on the back surface. Examples thereof include a resin film having a glossy coating film. When the light reflecting layer is formed on the entire surface of the colored layer, it becomes a solid reflecting layer, and when it is partially formed, it becomes a pattern layer.
Further, the colored layer 12 according to the present invention may have a pattern printing layer and / or a colored solid layer in addition to the light reflecting layer or instead of the light reflecting layer. Furthermore, if desired, the colored layer 12 may have a functional layer such as a magnetic layer or a conductive layer. The magnetic layer includes a magnetic material, and the conductive layer includes a conductive material.

本発明に係る着色層12は、着色ベタ層を有することが好ましく、この着色ベタ層に加えて、絵柄印刷層をも有することが意匠性を向上する観点から特に好ましい。通常、絵柄印刷層は着色ベタ層の外側に印刷される。
着色ベタ層及び絵柄印刷層としては、バインダーの樹脂を特定の樹脂から構成し、所望する色彩を得るための適当な着色剤を配合する他は、基本的には特に制限は無い。着色ベタ層及び絵柄印刷層は、通常は、印刷インキでグラビア印刷、活版印刷、シルクスクリーン印刷、オフセット印刷、インクジェット印刷等の公知の印刷法で形成すればよい。また、着色ベタ層は、ロールコート等の公知の塗工法でもよい。
The colored layer 12 according to the present invention preferably has a colored solid layer, and in addition to the colored solid layer, it preferably has a design printing layer from the viewpoint of improving design. Usually, the pattern printing layer is printed outside the colored solid layer.
The colored solid layer and the pattern printing layer are basically not particularly limited, except that the binder resin is composed of a specific resin and an appropriate colorant for obtaining a desired color is blended. The colored solid layer and the pattern printing layer may be generally formed by a known printing method such as gravure printing, letterpress printing, silk screen printing, offset printing, and inkjet printing with a printing ink. The colored solid layer may be a known coating method such as roll coating.

絵柄印刷層及び着色ベタ層の形成に使用するインキ(あるいは塗液)としては、接着性等を考慮して公知のものの中から適宜選択使用すればよい。例えば、インキ(あるいは塗液)のバインダーの樹脂としては、通常、アクリル樹脂、塩化ビニル−酢酸ビニル共重合体、ポリエステル樹脂、ポリウレタン樹脂等が用いられる。これらの内、バインダーの樹脂は、アクリル樹脂単独又はアクリル樹脂と塩化ビニル−酢酸ビニル共重合体との混合物を主成分とするのがより好ましい。表面保護層11としてアクリル樹脂を用いる場合は、表面保護層11との密着性を出す為にアクリル樹脂を用い、さらに塩化ビニル−酢酸ビニル共重合体又は別のアクリル樹脂を混合すると印刷適性、成形適性がさらに好適となる。
ここで、アクリル樹脂としては、上述の表面保護層11のところで列記したものと同様のものの中から適宜選択する他、メチル(メタ)アクリレート、エチル(メタ)アクリレート、ブチル(メタ)アクリレート、2−エチルヘキシル(メタ)アクリレート、オクチル(メタ)アクリレート等の(メタ)アクリル酸アルキルエステルと、2−ヒドロキシエチル(メタ)アクリレート、2−ヒドロキシブチル(メタ)アクリレート、2−ヒドロキシ−3−フェノキシプロピル(メタ)アクリレート等の分子中に水酸基を有する(メタ)アクリル酸エステルとを共重合させて得られるアクリルポリオールを用いることも出来る。
また、塩化ビニル−酢酸ビニル共重合体としては、通常、酢酸ビニル含有量が5〜20質量%程度、平均重合度350〜900程度のものが用いられる。必要に応じ、塩化ビニル−酢酸ビニル共重合体にさらにマレイン酸、フマル酸等のカルボン酸を共重合させてもよい。アクリル樹脂と塩化ビニル−酢酸ビニル共重合体との混合比は、アクリル樹脂/塩化ビニル−酢酸ビニル共重合体=1/9〜9/1(質量比)程度である。この他、副成分の樹脂として、必要に応じて、適宜その他の樹脂、例えば、熱可塑性ポリエステル樹脂、熱可塑性ウレタン樹脂、塩素化ポリエチレン、塩素化ポリプロピレン等の塩素化ポリオレフィン等の樹脂を混合してもよい。
また、インキ(あるいは塗液)に含有させる着色剤としては、例えば、チタン白、亜鉛華、カーボンブラック、鉄黒、弁柄、カドミウムレッド、群青、コバルトブルー、黄鉛、チタンイエロー等の無機顔料、フタロシアニンブルー、インダスレンブルー、イソインドリノンイエロー、キナクリドンレッド、ペリレンレッド等の有機顔料、アルミニウム、真鍮等の金属の粉末又は鱗片等の金属顔料、二酸化チタン被覆雲母の粉末又は鱗片等の真珠光沢(パール)顔料、あるいは染料等が用いられる。
絵柄層及び絵柄印刷層の絵柄は、例えば、木目模様、石目模様、砂目模様、布目模様、皮絞模様、タイル貼模様、煉瓦積模様、幾何学図形、文字、記号等である。
The ink (or coating liquid) used for forming the pattern printing layer and the colored solid layer may be appropriately selected from known ones in consideration of adhesiveness and the like. For example, acrylic resin, vinyl chloride-vinyl acetate copolymer, polyester resin, polyurethane resin, etc. are usually used as the binder resin for the ink (or coating liquid). Among these, it is more preferable that the binder resin is mainly composed of an acrylic resin alone or a mixture of an acrylic resin and a vinyl chloride-vinyl acetate copolymer. When an acrylic resin is used as the surface protective layer 11, an acrylic resin is used to provide adhesion to the surface protective layer 11, and further, when mixed with a vinyl chloride-vinyl acetate copolymer or another acrylic resin, the printability and molding are improved. Suitability is further preferred.
Here, as an acrylic resin, it selects suitably from the thing similar to what was listed in the above-mentioned surface protective layer 11, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2- (Meth) acrylic acid alkyl esters such as ethylhexyl (meth) acrylate, octyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) An acrylic polyol obtained by copolymerizing a (meth) acrylic acid ester having a hydroxyl group in a molecule such as acrylate may also be used.
As the vinyl chloride-vinyl acetate copolymer, those having a vinyl acetate content of about 5 to 20% by mass and an average degree of polymerization of about 350 to 900 are usually used. If necessary, the vinyl chloride-vinyl acetate copolymer may be further copolymerized with a carboxylic acid such as maleic acid or fumaric acid. The mixing ratio of the acrylic resin and the vinyl chloride-vinyl acetate copolymer is about acrylic resin / vinyl chloride-vinyl acetate copolymer = 1/9 to 9/1 (mass ratio). In addition, as a subcomponent resin, if necessary, other resins such as thermoplastic polyester resin, thermoplastic urethane resin, chlorinated polyethylene, chlorinated polypropylene, and other chlorinated polyolefin resins may be mixed. Also good.
Examples of the colorant contained in the ink (or coating liquid) include inorganic pigments such as titanium white, zinc white, carbon black, iron black, petal, cadmium red, ultramarine, cobalt blue, chrome lead, and titanium yellow. , Phthalocyanine blue, indanthrene blue, isoindolinone yellow, quinacridone red, perylene red and other organic pigments, metal powders such as aluminum and brass or metal pigments such as scales, titanium dioxide-coated mica powder and pearls such as scales (Pearl) pigments or dyes are used.
The pattern of the pattern layer and the pattern printing layer is, for example, a wood grain pattern, a stone pattern, a grain pattern, a cloth pattern, a leather pattern, a tiled pattern, a brickwork pattern, a geometric figure, a character, a symbol, and the like.

本発明の加飾用シート10に用いられる接着剤層13としては、例えば感熱型の接着剤として熱可塑性樹脂、熱硬化性樹脂等の公知の樹脂が用いられる。熱可塑性樹脂では、例えば、アクリル樹脂、塩素化ポリオレフィン樹脂、塩化ビニル−酢酸ビニル共重合体、熱可塑性ウレタン樹脂、熱可塑性ポリエステル樹脂、ポリアミド樹脂、ゴム系樹脂等の1種又は2種以上の混合物が用いられる。また、熱硬化性樹脂では、ウレタン樹脂、エポキシ樹脂等が用いられる。
接着剤層13は、これら樹脂による接着剤を、グラビア印刷、ロールコート等の公知の印刷又は塗工法により形成する。また、接着剤層13の厚さは特に制限は無いが、通常は1〜20μm程度、好ましくは1〜10μmである。
As the adhesive layer 13 used in the decorative sheet 10 of the present invention, for example, a known resin such as a thermoplastic resin or a thermosetting resin is used as a heat-sensitive adhesive. In the thermoplastic resin, for example, one or a mixture of two or more of acrylic resin, chlorinated polyolefin resin, vinyl chloride-vinyl acetate copolymer, thermoplastic urethane resin, thermoplastic polyester resin, polyamide resin, rubber resin, etc. Is used. In the thermosetting resin, a urethane resin, an epoxy resin, or the like is used.
The adhesive layer 13 is formed by known printing or coating methods such as gravure printing, roll coating, and the like using an adhesive made of these resins. The thickness of the adhesive layer 13 is not particularly limited, but is usually about 1 to 20 μm, preferably 1 to 10 μm.

本発明の凹凸加飾射出成形品1に用いられる加飾シート10を製造する方法は、例えば、表面保護層11となる樹脂フィルムの裏面に、別の樹脂フィルムの裏面に金属薄膜層あるいは白色塗膜又は金属光沢塗膜を形成した光反射層からなる着色層12を積層した後、接着剤層13を塗工すればよい。また、所望により、光反射層の表面に絵柄印刷層を印刷し、次に光反射層の裏面に接着剤層13を塗工してもよい。さらに、表面保護層11となる樹脂フィルムの裏面に、光反射層に代えて、絵柄印刷層、着色ベタ層の順で印刷又は塗工し、次に接着剤層13を塗工してもよい。
次に、加飾シート10は公知の方法で接着剤層13面に公知の方法でエンボス加工される。エンボス加工時の加飾シート温度は通常150℃以上であって、例えば200〜240℃であり、エンボス版温度は通常90℃程度である。表面保護層11に裏面からエンボス加工を施した場合は、射出樹脂が高温であっても、接着剤層13面の裏面側から見た凹部に直ちに射出樹脂が満たされるので、エンボスされた凹凸模様の凹凸形状が消失することがない。
The method for producing the decorative sheet 10 used for the uneven decorative injection molded product 1 of the present invention includes, for example, a metal thin film layer or a white coating on the back surface of another resin film on the back surface of the resin film to be the surface protective layer 11. The adhesive layer 13 may be applied after laminating the colored layer 12 composed of a light reflecting layer on which a film or a metallic gloss coating is formed. Further, if desired, a pattern printing layer may be printed on the surface of the light reflecting layer, and then the adhesive layer 13 may be applied to the back surface of the light reflecting layer. Further, instead of the light reflecting layer, the back surface of the resin film to be the surface protective layer 11 may be printed or coated in the order of the pattern printing layer and the colored solid layer, and then the adhesive layer 13 may be coated. .
Next, the decorative sheet 10 is embossed by a known method on the surface of the adhesive layer 13 by a known method. The decorative sheet temperature at the time of embossing is usually 150 ° C. or higher, for example, 200 to 240 ° C., and the embossed plate temperature is usually about 90 ° C. When the surface protective layer 11 is embossed from the back side, even when the injection resin is at a high temperature, the concave portion viewed from the back side of the adhesive layer 13 surface is immediately filled with the injection resin. The concavo-convex shape does not disappear.

本発明の凹凸加飾射出成形品1の射出樹脂層20に用いられる樹脂としては、基本的には特に制限はなく公知の樹脂でよい。製品の要求物性やコスト等に応じて選定すればよい。熱可塑性樹脂であれば、ABS(アクリロニトリル−ブタジエン−スチレン共重合体)樹脂、ポリカーボネート樹脂、スチレン樹脂、アクリル樹脂、塩化ビニル樹脂、ポリオレフィン系樹脂等である。また、硬化性樹脂であれば、2液硬化型の樹脂、例えば、ウレタン樹脂、不飽和ポリエステル樹脂、エポキシ樹脂等の未硬化樹脂液等である。熱可塑性樹脂は加熱熔融して流動状態で射出し、また硬化性樹脂は(その未硬化物を)室温又は適宜加熱して流動状態で射出する。
なお、射出樹脂は、用途に応じて適宜、着色剤を添加して着色した樹脂を使用してもよい。着色剤には、上記の着色層12で述べた如き公知の着色剤を使用すればよい。また、射出樹脂には、必要に応じ適宜、シリカ、アルミナ、タルク、炭酸カルシウム、水酸化アルミニウム等の無機物粉末、ガラス繊維等の充填剤、安定剤、滑剤等の公知の各種添加剤を含有させてもよい。
The resin used for the injection resin layer 20 of the uneven decorative injection molded product 1 of the present invention is basically not particularly limited and may be a known resin. It may be selected according to the required physical properties and cost of the product. Examples of the thermoplastic resin include ABS (acrylonitrile-butadiene-styrene copolymer) resin, polycarbonate resin, styrene resin, acrylic resin, vinyl chloride resin, and polyolefin resin. Further, in the case of a curable resin, it is a two-component curable resin, for example, an uncured resin solution such as a urethane resin, an unsaturated polyester resin, or an epoxy resin. The thermoplastic resin is melted by heating and injected in a fluid state, and the curable resin (its uncured product) is injected at room temperature or appropriately heated and injected in a fluid state.
Note that as the injection resin, a resin colored by adding a colorant may be used as appropriate according to the application. As the colorant, a known colorant as described in the colored layer 12 may be used. The injection resin may contain various known additives such as silica, alumina, talc, calcium carbonate, aluminum hydroxide and other inorganic powders, fillers such as glass fibers, stabilizers, and lubricants as necessary. May be.

次に、本発明を実施例により、さらに詳細に説明するが、本発明は、これらの例によってなんら限定されるものではない。
アクリル樹脂(メチルメタクリレート樹脂)からなる樹脂フィルム(膜厚125μm)の裏面に、ポリブチルメタクリレート/塩化ビニル−酢酸ビニル共重合体(質量比:2/1)組成物からなる絵柄印刷層をグラビア印刷し、絵柄印刷層が印刷されていない部分に金属光沢塗膜をグラビア印刷し光反射層とし、絵柄印刷層と同じ組成物に高隠蔽性顔料(チタン白及び着色顔料)を含有させた着色ベタ層をロールコートにより塗工し、さらに、アクリル樹脂からなる接着剤層をロールコートにより塗工した。乾燥後、表面保護層に裏面から(接着剤層面側に)所定のエンボス加工(シート温度を200〜240℃に、エンボス版温度を約90℃に制御した。)を施して、着色層と接着剤層に凹凸模様が付与された加飾シートを得た。
この加飾シートを100℃に加熱し、射出成形金型(金型温度60℃)内で真空成形し、射出成形金型(雌型、抜き角5°)に密着させた。その後、射出成形工程で、樹脂圧350kg/cm2、樹脂温度230℃にてABS樹脂を射出し、加飾シートの表面保護層に熱と圧力をかけた。これにより、表面保護層の樹脂フィルムが金型表面のシボに沿って変形し、金型表面のシボ模様が凹凸加飾射出成形品に転写された。金型正面部の表面シボ深さを100μmとした。樹脂が金型に接触した瞬間に、樹脂熱が金型に逃げるため、加飾シート表面は90℃程度になった。冷却後、射出成形金型から取り出した凹凸加飾射出成形品の外観は、エンボス加工及び金型シボ加工による略同一形状の2種類の凹凸模様が複合して立体的に表出し、模様が浮き出た感じで高級感を漂わせるものであった。さらに表面の凹凸の蝕感(ザラザラ感)による意匠感も得られて、模様の視覚による意匠感との複合効果をも奏することができた。
EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by these examples.
Gravure printing a pattern print layer made of a polybutyl methacrylate / vinyl chloride-vinyl acetate copolymer (mass ratio: 2/1) composition on the back of a resin film (thickness 125 μm) made of acrylic resin (methyl methacrylate resin) In addition, a colored solid that contains a high gloss concealing pigment (titanium white and colored pigment) in the same composition as the pattern printing layer by gravure printing a metallic glossy coating on the part where the pattern printing layer is not printed. The layer was applied by roll coating, and an adhesive layer made of acrylic resin was further applied by roll coating. After drying, the surface protective layer is subjected to predetermined embossing from the back surface (to the adhesive layer surface side) (sheet temperature is controlled to 200 to 240 ° C. and embossing plate temperature is controlled to about 90 ° C.) to adhere to the colored layer. A decorative sheet having an uneven pattern on the agent layer was obtained.
This decorative sheet was heated to 100 ° C., vacuum-molded in an injection mold (mold temperature 60 ° C.), and brought into close contact with the injection mold (female mold, punch angle 5 °). Thereafter, in an injection molding process, ABS resin was injected at a resin pressure of 350 kg / cm 2 and a resin temperature of 230 ° C., and heat and pressure were applied to the surface protective layer of the decorative sheet. Thereby, the resin film of the surface protective layer was deformed along the texture on the mold surface, and the texture pattern on the mold surface was transferred to the uneven decorative injection molded product. The surface embossing depth of the mold front part was 100 μm. Since the resin heat escapes to the mold at the moment when the resin comes into contact with the mold, the surface of the decorative sheet is about 90 ° C. After cooling, the appearance of the concave / convex decorative injection molded product taken out from the injection mold is three-dimensionally expressed by combining two types of concave / convex patterns of approximately the same shape by embossing and embossing. It was a feeling of luxury. Furthermore, a design feeling due to the texture (roughness) of the irregularities on the surface was obtained, and a combined effect with the design feeling by the visual appearance of the pattern could be achieved.

本発明の凹凸加飾射出成形品は、各種の自動車用内装品や外装品、ビルディング・家屋内装品、高級日用雑貨品等に好適に用いられる。   The concavo-convex decorative injection-molded product of the present invention is suitably used for various automobile interior and exterior products, building / household interior products, high-end household goods, and the like.

本発明の凹凸加飾射出成形品の断面模式図である。It is a cross-sectional schematic diagram of the uneven | corrugated decoration injection molded product of this invention. 本発明の凹凸加飾射出成形品の平面模式図である。It is a plane schematic diagram of the uneven | corrugated decoration injection molded product of this invention. 本発明で利用する射出成形方法の一形態を説明する概念図である。It is a conceptual diagram explaining one form of the injection molding method utilized by this invention.

1 凹凸加飾射出成形品
10 加飾シート
11 表面保護層
111 表面保護層の表面側から見た凸部
112 表面保護層の表面側から見た凹部
12 着色層
121 着色層の表面側から見た凸部
122 着色層の表面側から見た凹部
13 接着剤層
131 接着剤層の表面側から見た凸部
132 接着剤層の表面側から見た凹部
20 射出樹脂層
31 射出成形金型(雄型)
32 射出成形金型(雌型)
33 吸引孔
34 射出樹脂
35 シートクランプ
36 金型の正面部
DESCRIPTION OF SYMBOLS 1 Concave decoration injection molded product 10 Decorative sheet 11 Surface protective layer 111 Convex part seen from the surface side of the surface protective layer 112 Concave part seen from the surface side of the surface protective layer 12 Colored layer 121 Seen from the surface side of the colored layer Convex part 122 Concave part seen from the surface side of the colored layer 13 Adhesive layer 131 Convex part seen from the surface side of the adhesive layer 132 Concave part seen from the surface side of the adhesive layer 20 Injection resin layer 31 Injection mold (male Type)
32 Injection mold (female)
33 Suction hole 34 Injection resin 35 Sheet clamp 36 Front of mold

Claims (5)

透明又は半透明の樹脂フィルムからなる表面保護層と、前記表面保護層の内側に積層された着色層と、前記着色層の内側に積層された接着剤層と、射出樹脂層とを有する射出成形品であって、前記表面保護層の表面ならびに前記着色層及び前記接着剤層が凹凸模様を有し、前記表面保護層の表面は100〜1000μmの深さでシボ加工された射出成形金型のキャビティ面に対応する凹凸模様を有し、前記着色層及び前記接着剤層は40〜60μmのエンボス深さを有する凹凸模様を有することを特徴とする凹凸加飾射出成形品。 Injection molding comprising a surface protective layer made of a transparent or translucent resin film, a colored layer laminated inside the surface protective layer, an adhesive layer laminated inside the colored layer, and an injection resin layer The surface of the surface protective layer, the colored layer, and the adhesive layer have a concavo-convex pattern, and the surface of the surface protective layer is an injection mold that is textured at a depth of 100 to 1000 μm. have a concavo-convex pattern corresponding to the cavity surface, the colored layer and the adhesive layer is uneven decorative injection-molded article, characterized by have a rugged pattern having an embossed depth of 40 to 60 [mu] m. 前記接着剤層に接する前記射出樹脂層の面が、前記接着剤層の凹部に対応する凸部を有することを特徴とする請求項1に記載の凹凸加飾射出成形品。 The surface of the injected resin layer in contact with the adhesive layer, unevenness decorated injection molded article according to claim 1, characterized in that it comprises a convex portion corresponding to the recess of the adhesive layer. 前記着色層が光反射層を有する請求項1又は2に記載の凹凸加飾射出成形品。 The uneven decorative injection molded product according to claim 1 or 2 , wherein the colored layer has a light reflecting layer. 前記着色層が絵柄印刷層及び/又は着色ベタ層を有する請求項1〜3のいずれか1項に記載の凹凸加飾射出成形品。 The uneven | corrugated decoration injection molded product of any one of Claims 1-3 in which the said colored layer has a pattern printing layer and / or a colored solid layer. 透明又は半透明の樹脂フィルムからなる表面保護層、着色層、接着剤層の順に有する加飾シートに、前記接着剤層側からエンボス加工を行い、40〜60μmのエンボス深さを有する凹凸模様を付与した後、100〜1000μmのシボ深さでシボ加工されて凹凸形状をキャビティ面に有する金型と前記表面保護層とが接するように設置して前記接着剤層側へと樹脂を射出し、前記金型の凹凸形状を前記表面保護層に転写すると共に加飾シートに射出樹脂層を積層させることを特徴とする凹凸加飾射出成形品の製造方法。 A decorative sheet having a surface protective layer, a colored layer, and an adhesive layer in the order of a transparent or translucent resin film is embossed from the adhesive layer side , and has an uneven pattern having an emboss depth of 40 to 60 μm. After being applied, the resin is injected into the adhesive layer side by placing it so that the surface protection layer is in contact with the mold having a concave and convex shape on the cavity surface that is textured at a texture depth of 100 to 1000 μm, A method for producing a concavo-convex decorative injection-molded product, wherein the concavo-convex shape of the mold is transferred to the surface protective layer and an injection resin layer is laminated on a decorative sheet.
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