JP5655289B2 - Decorative sheet - Google Patents
Decorative sheet Download PDFInfo
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- JP5655289B2 JP5655289B2 JP2009245987A JP2009245987A JP5655289B2 JP 5655289 B2 JP5655289 B2 JP 5655289B2 JP 2009245987 A JP2009245987 A JP 2009245987A JP 2009245987 A JP2009245987 A JP 2009245987A JP 5655289 B2 JP5655289 B2 JP 5655289B2
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- thermoplastic resin
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- 229920005989 resin Polymers 0.000 claims description 44
- 239000011347 resin Substances 0.000 claims description 44
- 229920006352 transparent thermoplastic Polymers 0.000 claims description 17
- 229920000178 Acrylic resin Polymers 0.000 claims description 16
- 239000004925 Acrylic resin Substances 0.000 claims description 16
- 229920005992 thermoplastic resin Polymers 0.000 claims description 16
- 229920001187 thermosetting polymer Polymers 0.000 claims description 11
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 7
- NIHNNTQXNPWCJQ-UHFFFAOYSA-N fluorene Chemical compound C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000004640 Melamine resin Substances 0.000 claims description 3
- 229920000877 Melamine resin Polymers 0.000 claims description 3
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 239000009719 polyimide resin Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 9
- 238000000465 moulding Methods 0.000 description 8
- 238000007639 printing Methods 0.000 description 7
- 238000000576 coating method Methods 0.000 description 5
- 238000004049 embossing Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- -1 acrylic ester Chemical class 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000007646 gravure printing Methods 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 239000003831 antifriction material Substances 0.000 description 1
- 239000003429 antifungal agent Substances 0.000 description 1
- 229940121375 antifungal agent Drugs 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Description
本発明は、自動車内装パネル、携帯電話、パーソナルコンピューターの躯体等のインサートおよびインモールド成形品の加飾に用いられる化粧シートに関するものであり、特にはデザイン性に優れ内部に凹凸感を有した意匠を付与できる化粧シートに関する。 TECHNICAL FIELD The present invention relates to a decorative sheet used for decoration of inserts and in-mold molded products such as automobile interior panels, mobile phones, personal computer housings, etc., and in particular, a design with excellent design and a sense of unevenness inside. It is related with the decorative sheet which can provide.
近年、インサートおよびインモールド成形品はデザインを重視する傾向にあり、特に携帯電話、パーソナルコンピューターの躯体等は意匠性が売り上げに与える影響は大きいとされている。 In recent years, inserts and in-mold molded products have a tendency to place importance on design. Especially, the case of mobile phones, personal computer casings, etc. is said to have a great influence on design.
インサートおよびインモールド成形品の加飾用の化粧シートとしては、成形品に絵柄模様層を転写するための転写シートが多く用いられている。また、絵柄模様層を有する透明の熱可塑性樹脂シートの絵柄模様層側を成形シートに貼り合わせて使用する化粧シートもあった。また、絵柄模様層を設けた熱可塑性樹脂シートをインサートおよびインモールド成形で貼り合わせる時に、シート側の金型に凹凸模様を設けることによって付与された凹凸の上から透明の樹脂層を凹凸を埋めるように塗装することにより、絵柄模様層の柄表現と内部凹凸模様の立体的表現を併せ持つ意匠性の高い成形品があった。また、住宅、店舗、オフィス等の家具、建具、什器などに用いられる化粧シートに関しては、印刷シートの印刷上から凹凸模様を付与し、溶融熱可塑性樹脂を凹凸模様を埋めるように製膜した上から二軸延伸透明ポリエステルシートを貼り合わせた内部に凹凸柄を有する意匠性の高い化粧シートがあった。 As decorative sheets for decorating inserts and in-mold molded products, a transfer sheet for transferring a pattern layer to the molded product is often used. In addition, there is a decorative sheet that is used by sticking the pattern layer side of a transparent thermoplastic resin sheet having a pattern layer to a molded sheet. In addition, when a thermoplastic resin sheet provided with a pattern layer is bonded by insert and in-mold molding, the transparent resin layer is filled from above the unevenness provided by providing an uneven pattern on the mold on the sheet side. By coating in this way, there was a molded product with high designability that had both the pattern expression of the pattern layer and the three-dimensional expression of the internal concavo-convex pattern. In addition, for decorative sheets used for furniture, joinery, furniture, etc. in houses, stores, offices, etc., a concave / convex pattern is applied from the top of the printed sheet, and a molten thermoplastic resin film is formed to fill the concave / convex pattern. There was a highly decorative decorative sheet having a concavo-convex pattern inside the biaxially stretched transparent polyester sheet.
しかし、前記転写シートや透明樹脂シートに絵柄模様層を設けたシートでは絵柄模様層で表現できる意匠感のみで平面的な表現にとどまった。また、金型による凹凸付与は凹凸柄と成形形状毎に金型を作製しなければならず、そのコストは高額になってしまうという問題と成形後に塗装が必要で工程が多くなるといった問題があった。また、建装材用途の内部エンボスシートは化粧板にする加工も化粧板を加工する後工程の温度が比較的低いためインサートおよびインモールド成形時の高温下ではエンボスの形状が保てないという問題と、二軸延伸ポリエステルシートの形状追従性の悪さから成形可能なシート形状が限られるといった問題があった。 However, a sheet provided with a pattern layer on the transfer sheet or the transparent resin sheet has only a two-dimensional expression only with a design feeling that can be expressed by the pattern layer. In addition, there is a problem that the molds must be prepared for each concavo-convex pattern and molded shape, and the cost becomes high, and there is a problem that painting is necessary after molding and the number of processes is increased. It was. In addition, because the internal embossed sheet for building materials is used as a decorative board, the post-processing temperature of the decorative board is relatively low, so the shape of the emboss cannot be maintained at high temperatures during insert and in-mold molding. And there existed a problem that the sheet | seat shape which can be shape | molded was limited from the bad shape followable | trackability of a biaxially stretched polyester sheet.
本発明は前記問題点を解決するためになされたものであり、その課題とするところは、絵柄模様層と内部凹凸模様を併せ持つ高意匠で、かつ後工程や高価な設備が必要無く、高温下でも意匠感を保持した加工性の良好なインサートおよびインモールド成形用化粧シートを提供することにある。 The present invention has been made to solve the above-mentioned problems, and the problem is that the design is a high design having both a pattern layer and an internal concavo-convex pattern, and there is no need for a post-process or expensive equipment at high temperatures. However, an object of the present invention is to provide an insert with good workability and a decorative sheet for in-mold molding that retains a design feeling.
本発明はこの課題を解決したものであり、すなわちその請求項１記載の発明は、着色熱可塑性樹脂シートあるいは絵柄模様層を表面に設けた熱可塑性樹脂シートの表面に凹凸模様を設け、その表面上に透明熱可塑性樹脂層を設けてなる、内部に凹凸模様を有する化粧シートにおいて、前記凹凸模様の凹部にメラミン樹脂、尿素樹脂、フェノール樹脂、アクリルエポキシ樹脂、フローレン系アクリル樹脂、ポリイミド樹脂より選択される熱硬化性樹脂を充填し、その上に溶融押出にて前記透明熱可塑性樹脂層を設けてなることを特徴とする化粧シートである。 The present invention solves this problem, that is, the invention according to claim 1 is provided with a concavo-convex pattern on the surface of a colored thermoplastic resin sheet or a thermoplastic resin sheet provided with a pattern layer on its surface. In the decorative sheet having a concavo-convex pattern on the inside, provided with a transparent thermoplastic resin layer on the concavo-convex pattern, the dent is selected from melamine resin, urea resin, phenol resin, acrylic epoxy resin, florene acrylic resin, and polyimide resin. The decorative sheet is characterized in that it is filled with a thermosetting resin to be formed, and the transparent thermoplastic resin layer is provided thereon by melt extrusion.
また、請求項２記載の発明は、前記透明熱可塑性樹脂層の上にさらに透明アクリル系樹脂シートを貼り合わせてなることを特徴とする請求項１に記載の化粧シートである。 The invention according to claim 2 is the decorative sheet according to claim 1, wherein a transparent acrylic resin sheet is further bonded onto the transparent thermoplastic resin layer.
また、請求項３記載の発明は、前記凹凸模様が微細な間隔の複数の平行な直線または曲線状の条模様からなる縞模様を一単位とし、隣り合った単位縞模様同士の条模様の条方向が互いに異なるように組み合わされた形状からなることを特徴とする請求項１または２のいずれかに記載の化粧シートである。 The invention according to claim 3 is characterized in that the concavo-convex pattern has a striped pattern composed of a plurality of parallel straight lines or curved strips with fine intervals as one unit, and the strips of adjacent unit striped patterns. The decorative sheet according to claim 1, wherein the decorative sheet has a shape combined such that directions are different from each other.
本願発明はその請求項１記載の発明により化粧シートの凹凸形状の凹部に熱硬化性樹脂を充填させていることにより、インサートおよびインモールド成形時の高温下での凹凸形状を保持することが可能となる。 According to the present invention, the concave and convex shape of the decorative sheet is filled with the thermosetting resin according to the first aspect of the invention, so that the concave and convex shape can be maintained at a high temperature during insert and in-mold molding. It becomes.
また、請求項２記載の発明により、耐衝撃性、表面硬度といった表面物性を付与するとともに形状追従性を与えることができる。特に自動車内装パネルに必要とされる物性を付与することが可能となる。 Further, according to the second aspect of the invention, it is possible to provide surface physical properties such as impact resistance and surface hardness and shape conformability. In particular, the physical properties required for the automobile interior panel can be imparted.
また、請求項３記載の発明により、平行条模様の一単位をパターンとした柄を与えると同時に、角度の違うパターンは目視の位置により反射が異なることから見る角度により煌き感が異なる特殊な意匠を付与することが可能となり、単色印刷、抽象柄印刷と組み合わせても、木目印刷柄と組み合わせて本木の有する照り感と呼ばれる煌き感を表現するにも好適で、高い意匠性を表現することが可能となる。 Further, according to the invention of claim 3, a pattern having one unit of parallel stripes as a pattern is provided, and at the same time, a pattern having a different angle has a special feeling that varies depending on the viewing angle because reflection differs depending on the viewing position. Design can be applied, and it is suitable for expressing the shimmering feeling called the shimmering feeling of the wood, combined with single-color printing, abstract pattern printing, or wood grain printing pattern, and expresses high design characteristics It becomes possible to do.
以下、本発明の実施の形態について、図面に基づき詳細に説明する。図１に本発明の化粧シートの一実施例の断面の構造を示す。熱可塑性樹脂シート１の上に絵柄模様層２、凹凸模様の凹部に熱硬化性樹脂３、透明熱可塑性樹脂層４、透明アクリル系樹脂シート５をこの順に設けてなる。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cross-sectional structure of one embodiment of the decorative sheet of the present invention. The pattern layer 2 is provided on the thermoplastic resin sheet 1, and the thermosetting resin 3, the transparent thermoplastic resin layer 4, and the transparent acrylic resin sheet 5 are provided in this order in the concave and convex portions.
本発明における熱可塑性樹脂シート１としては、顔料等任意の着色剤で着色した着色熱可塑性樹脂シートを用いるかあるいは後述するように熱可塑性樹脂シート１上に絵柄模様層２を設ける。これにより表面に凹凸模様を設けたのち透明熱可塑性樹脂層４を設けることで内部にある凹凸模様がはっきりと認識できるものとなり、高い意匠性を表現することが可能となる。 As the thermoplastic resin sheet 1 in the present invention, a colored thermoplastic resin sheet colored with an optional colorant such as a pigment is used, or a pattern layer 2 is provided on the thermoplastic resin sheet 1 as described later. Thus, by providing a concavo-convex pattern on the surface and then providing the transparent thermoplastic resin layer 4, the concavo-convex pattern inside can be clearly recognized, and high designability can be expressed.
熱可塑性樹脂シート１に用いる熱可塑性樹脂としては、エンボス加工による凹凸形状付与が容易でインサートおよびインモールド加工適性を有するものであれば特に限定するところではないが、アクリル系樹脂、ポリカーボネート樹脂、ポリオレフィン樹脂等が挙げられる。厚みは凹凸模様を付与できて表面物性を保持できる厚みが必要であるが、３０〜３００μｍが好適である。 The thermoplastic resin used for the thermoplastic resin sheet 1 is not particularly limited as long as it can be easily provided with a concavo-convex shape by embossing and has insert and in-mold processing suitability. However, acrylic resin, polycarbonate resin, polyolefin Examples thereof include resins. The thickness needs to be thick enough to provide a concavo-convex pattern and maintain surface properties, but is preferably 30 to 300 μm.
本発明における絵柄模様層２としては、グラビア印刷等公知の方法により設けることが可能であるが、用いるインキに関しては、熱可塑性樹脂シート１の種類により密着性を考慮して適宜選択される。印刷方法は特に限定するものではないが、凹凸模様の成形時の伸びが大きい場合はインキ層も厚く塗工する必要があるのでスクリーン印刷が望ましい。さらには、光輝性顔料を添加したインキで印刷すると、凹凸模様による表現がより際立って意匠表現の巾が広がるので好適である。絵柄模様層２に用いる絵柄としては、ベタ柄、木目柄、石目柄、抽象柄、単色無地等、従来の化粧シートの場合と同様の各種の絵柄を採用することができる。 The pattern layer 2 in the present invention can be provided by a known method such as gravure printing, but the ink to be used is appropriately selected in consideration of the adhesiveness depending on the type of the thermoplastic resin sheet 1. The printing method is not particularly limited, but screen printing is desirable because the ink layer needs to be thickly applied when the elongation at the time of forming the concavo-convex pattern is large. Furthermore, printing with an ink to which a bright pigment is added is preferable because the expression by the uneven pattern is more conspicuous and the range of design expression is widened. As the pattern used for the pattern pattern layer 2, various patterns similar to those in the case of a conventional decorative sheet such as a solid pattern, a grain pattern, a stone pattern, an abstract pattern, and a plain solid color can be employed.
本発明における凹凸模様を設ける方法としてはエンボス形成方法が好適に用いられる。具体的には熱可塑性樹脂シート１を加熱、軟化した状態で凹凸を有する金属製や樹脂製のエンボス版やエンボスロールを表面側より圧着し冷却する付与を用いることにより所望の形状を付与できる。特には前記凹凸模様が微細な間隔の複数の平行な直線または曲線状の条模様からなる縞模様を一単位とし、隣り合った単位縞模様同士の条模様の条方向が互いに異なるように組み合わされた形状とすることにより、目視の位置により反射が異なることから見る角度により煌き感が異なる特殊な意匠を付与することが可能となり、単色印刷、抽象柄印刷と組み合わせても、木目印刷柄と組み合わせて本木の有する照り感と呼ばれる煌き感を表現するにも好適で、高い意匠性を表現することが可能となる。 An embossing method is suitably used as a method for providing the uneven pattern in the present invention. Specifically, a desired shape can be imparted by using an application in which an embossed plate or embossing roll made of metal or resin having concavities and convexities is pressed from the surface side and cooled in a state where the thermoplastic resin sheet 1 is heated and softened. In particular, the concavo-convex pattern is a unit consisting of a striped pattern consisting of a plurality of parallel straight lines or curved strips with fine intervals, and the strips of adjacent unit striped patterns are combined so that the strip directions are different from each other. It is possible to give a special design with a different feeling of shine depending on the viewing angle because reflection differs depending on the visual position, even if combined with monochrome printing and abstract pattern printing, It is suitable for expressing the feeling of shimmering called “shining feeling” of the main tree in combination, and it becomes possible to express high designability.
本発明における凹凸模様の凹部の中に充填する熱硬化性樹脂３としては、透明で高温下においても変色や劣化をしないもので、前記絵柄模様層２と後述する透明熱可塑性樹脂層４との密着が良好なものであれば適宜選択可能である。例えば、メラミン樹脂、尿素樹脂、フェノール樹脂、アクリルエポキシ樹脂、フローレン系アクリル樹脂、ポリイミド樹脂などが適用できる。充填方法としては、グラビアリバース法等凹部に塗工樹脂が入り易い方式で凹凸模様の面に塗工し、表面の樹脂をドクター刃で引き掻いてさらに凹部に流し込むことにより凹部へ樹脂を充填することが可能である。ただし、実際問題として凹部全体を樹脂で完全に充填することは塗工法や樹脂の固形分の点から困難なこともある。しかしながら、少なくとも凹部の底部が熱硬化性樹脂で埋まっていれば、インサートおよびインモールド成形時の高温下での凹凸形状の保持という効果は発現可能である。 The thermosetting resin 3 filled in the concave and convex portions of the concave and convex pattern according to the present invention is transparent and does not discolor or deteriorate even at high temperatures. The pattern layer 2 and the transparent thermoplastic resin layer 4 to be described later Any material having good adhesion can be selected as appropriate. For example, a melamine resin, a urea resin, a phenol resin, an acrylic epoxy resin, a fluorene acrylic resin, a polyimide resin, or the like can be applied. As a filling method, the resin is applied to the surface of the concavo-convex pattern by a method such as gravure reverse method in which the coating resin easily enters, and the resin is filled into the recess by scratching the resin on the surface with a doctor blade and pouring into the recess. It is possible. However, as a practical matter, it may be difficult to completely fill the entire recess with resin from the viewpoint of the coating method and the solid content of the resin. However, if at least the bottom of the recess is filled with a thermosetting resin, the effect of maintaining the concavo-convex shape at a high temperature during insert and in-mold molding can be exhibited.
本発明における透明熱可塑性樹脂層４としては、前記熱硬化性樹脂３を充填した凹凸模様の上に溶融押出しにて設けることが可能である。これにより、前記熱硬化性樹脂３が凹部全体に充填されていなくても、表面が平らで内部に凹凸模様を有する化粧シートとすることが可能となる。前記透明熱可塑性樹脂層４に用いる透明熱可塑性樹脂としては、必要な物性により厚みとともに適宜選択可能であるが、厚みはインサートおよびインモールド成形時のハンドリングの点でシート全体の厚みを調整する際に該層の厚みで調整しても良い。また、意匠的に深みを持たせたい場合は厚めに設定するのが望ましいが、２０〜１５０μｍが好適である。 The transparent thermoplastic resin layer 4 in the present invention can be provided by melt extrusion on an uneven pattern filled with the thermosetting resin 3. Thereby, even if the thermosetting resin 3 is not filled in the entire recess, a decorative sheet having a flat surface and an uneven pattern inside can be obtained. The transparent thermoplastic resin used for the transparent thermoplastic resin layer 4 can be appropriately selected along with the thickness depending on the necessary physical properties, but the thickness is adjusted when adjusting the thickness of the entire sheet in terms of handling during insert and in-mold molding. Further, the thickness of the layer may be adjusted. Moreover, when it is desired to have a depth in design, it is desirable to set it thick, but 20 to 150 μm is preferable.
本発明における透明アクリル系樹脂シート５としては、インサートおよびインモールド成形時の追従性を上げるために適宜設けられるものである。用いる透明アクリル系樹脂としては化粧シートに求められる表面物性、光沢度等により適宜選択可能である。例えばアクリロニトリル、メタクリロニトリル、アクリル酸、アクリル酸メチル、アクリル酸エチル、アクリル酸ブチル、メタクリル酸、メタクリル酸メチル、メタクリル酸エチル、メタクリル酸ブチル等のアクリル系単量体の単独重合体や、それらの２種以上の共重合体、或いは、これらのアクリル系単量体の１種以上と、それらと共重合可能な重合性不飽和単量体の１種以上との共重合体などからなる樹脂が使用可能である。 The transparent acrylic resin sheet 5 in the present invention is appropriately provided in order to improve followability at the time of insert and in-mold molding. The transparent acrylic resin to be used can be appropriately selected depending on the surface physical properties and glossiness required for the decorative sheet. For example, homopolymers of acrylic monomers such as acrylonitrile, methacrylonitrile, acrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate, methacrylic acid, methyl methacrylate, ethyl methacrylate, butyl methacrylate, and the like Or a resin comprising one or more of these acrylic monomers and one or more polymerizable unsaturated monomers copolymerizable therewith. Can be used.
中でも、透明性、耐候性、表面硬度、成形性などの観点から、メタクリル酸メチルを主成分とする単独重合体又は共重合体からなる樹脂を用いることが最も望ましい。また、耐衝撃性の観点からは、例えばブタジエン系、アクリル酸エステル系、アクリル酸エステル−スチレン共重合体系、エチレン−酢酸ビニル共重合体系等のゴム成分を配合したアクリル系樹脂からなる樹脂を用いることが望ましい。 Among these, from the viewpoints of transparency, weather resistance, surface hardness, moldability, and the like, it is most desirable to use a resin made of a homopolymer or a copolymer mainly composed of methyl methacrylate. Also, from the viewpoint of impact resistance, for example, a resin made of an acrylic resin containing a rubber component such as a butadiene type, an acrylic ester type, an acrylic ester-styrene copolymer system, or an ethylene-vinyl acetate copolymer system is used. It is desirable.
前記透明アクリル系樹脂シート５には、必要に応じてさらに、例えば充填剤、減摩剤、艶調整剤、帯電防止剤、滑剤、難燃剤、抗菌剤、防黴剤、紫外線吸収剤、光安定剤、熱安定剤等の各種の添加剤が添加されていてもよい。厚みとしては４０μｍ〜１５０μｍが取り扱いやすさ、耐候性、コストの点等で好適である。 The transparent acrylic resin sheet 5 may further include, for example, a filler, an antifriction agent, a gloss adjuster, an antistatic agent, a lubricant, a flame retardant, an antibacterial agent, an antifungal agent, an ultraviolet absorber, and a light stabilizer. Various additives such as an agent and a heat stabilizer may be added. A thickness of 40 μm to 150 μm is suitable for ease of handling, weather resistance, cost, and the like.
熱可塑性樹脂シート１としてリケンテクノス（株）製のポリプロピレン樹脂フィルム「リベストＴＰＯ」（厚み１２０μｍ）を使用し、東洋インキ製造（株）製２液ウレタン樹脂バインダーインキ「Ｖ３５１ＵＲ」にてグラビア印刷機でパールインキ層を含む木目柄の絵柄模様層２を設けた。絵柄模様層２上から、微細な間隔の複数の平行な直線の条模様からなる縞模様を一単位とし、隣り合った単位縞模様同士の条模様の条方向が互いに異なるように組み合わされて形成された細かい多角形模様のエンボス版を使用し、シート温度が１３０℃になるよう温度設定したエンボス機にてエンボス加工による凹凸模様を付与した。その後、凹凸模様上に、グラビアリバース塗工により透明な熱硬化性樹脂３として東洋インキ製造（株）製「Ｖ３５１ＵＲ」インキのメジウムインキを用い、これを塗工し、塗工ラインの直後で乾燥前にドクターにより凸部のメジウムインキを凹部に流し込み充填させた。その後別ラインにて透明熱可塑性樹脂層４として溶融状態のランダムポリプロピレン樹脂を用い、これを乾燥後に６０μｍとなるよう押出ラミネートにより設けて、化粧シートを得た。 A polypropylene resin film “Rivest TPO” (120 μm thickness) manufactured by Riken Technos Co., Ltd. is used as the thermoplastic resin sheet 1, and a pearl is printed on a gravure printing machine using a two-component urethane resin binder ink “V351UR” manufactured by Toyo Ink Co., Ltd. A woodgrain pattern layer 2 including an ink layer was provided. Formed by combining stripe patterns consisting of a plurality of parallel straight stripes with fine intervals from the pattern layer 2 so that the stripe directions of adjacent unit stripe patterns are different from each other. The embossed plate having a fine polygonal pattern was used, and an uneven pattern by embossing was imparted by an embossing machine set at a temperature of 130 ° C. After that, on the concavo-convex pattern, a medium ink of “V351UR” ink manufactured by Toyo Ink Mfg. Co., Ltd. was used as the transparent thermosetting resin 3 by gravure reverse coating, and dried immediately after the coating line. The convex medium ink was poured into the concave portion by a doctor before filling. Thereafter, a random polypropylene resin in a molten state was used as the transparent thermoplastic resin layer 4 in another line, and this was provided by extrusion lamination so as to have a thickness of 60 μm after drying to obtain a decorative sheet.
前記実施例１の透明熱可塑性樹脂層４の上にアクリル系樹脂シート５として、三菱レイヨン（株）製アクリル樹脂フィルム「ＨＢＳ０１０」（厚み１２５μｍ）を用い、透明熱可塑性樹脂層４の上にポリエステル系接着剤を塗工し、アクリル系樹脂シート５側に塩化ビニル−酢酸ビニル共重合樹脂からなるアンカー剤を塗工した後、これらを貼り合わせ、化粧シートを得た。 An acrylic resin film “HBS010” (thickness 125 μm) manufactured by Mitsubishi Rayon Co., Ltd. was used as the acrylic resin sheet 5 on the transparent thermoplastic resin layer 4 of Example 1, and the polyester was formed on the transparent thermoplastic resin layer 4. After applying an adhesive and applying an anchor agent made of vinyl chloride-vinyl acetate copolymer resin on the acrylic resin sheet 5 side, these were bonded together to obtain a decorative sheet.
＜比較例１＞
実施例２において、熱硬化性樹脂３を充填させる工程を省略した以外は実施例２と同様にして化粧シートを得た。
<Comparative Example 1>
In Example 2, a decorative sheet was obtained in the same manner as in Example 2 except that the step of filling the thermosetting resin 3 was omitted.
＜比較例２＞
実施例２において、アクリル系樹脂シート５の代わりに二軸延伸ポリエステルシート（東洋紡績株式会社製「Ｅ５００１」（厚み１００μｍ））を用いた以外は実施例２と同様にして化粧シートを得た。
<Comparative example 2>
In Example 2, a decorative sheet was obtained in the same manner as in Example 2 except that a biaxially stretched polyester sheet (“E5001” (thickness: 100 μm) manufactured by Toyobo Co., Ltd.) was used instead of the acrylic resin sheet 5.
＜性能比較＞
１３０℃１時間静置後の内部凹凸のエンボス形状とシート温度１０５℃になるように加熱した直後に真空圧空プレスにより予備成形した時の形状追従性を目視で確認し○×評価をし、表面の鉛筆硬度を測定した。結果を表１に示す。
<Performance comparison>
The embossed shape of the internal irregularities after standing at 130 ° C for 1 hour and the shape following property when pre-formed by vacuum / pressure press immediately after heating to a sheet temperature of 105 ° C were visually confirmed and evaluated The pencil hardness was measured. The results are shown in Table 1.
本発明の化粧シートは、自動車内装パネル、携帯電話、パーソナルコンピューターの躯体等のインサートおよびインモールド成形品の加飾に利用可能である。 The decorative sheet of the present invention can be used for decorating inserts and in-mold molded products such as automobile interior panels, mobile phones, and personal computer casings.
１…熱可塑性樹脂シート
２…絵柄模様層
３…熱硬化性樹脂
４…透明熱可塑性樹脂層
５…透明アクリル系樹脂シート
DESCRIPTION OF SYMBOLS 1 ... Thermoplastic resin sheet 2 ... Pattern pattern layer 3 ... Thermosetting resin 4 ... Transparent thermoplastic resin layer 5 ... Transparent acrylic resin sheet
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| JP3200785B2 (en) * | 1993-07-16 | 2001-08-20 | 大日本印刷株式会社 | Manufacturing method of plastic molded products |
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