JP4154767B2 - Decorative sheet - Google Patents

Decorative sheet Download PDF

Info

Publication number
JP4154767B2
JP4154767B2 JP28308298A JP28308298A JP4154767B2 JP 4154767 B2 JP4154767 B2 JP 4154767B2 JP 28308298 A JP28308298 A JP 28308298A JP 28308298 A JP28308298 A JP 28308298A JP 4154767 B2 JP4154767 B2 JP 4154767B2
Authority
JP
Japan
Prior art keywords
resin layer
resin
layer
sheet
crystalline polypropylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP28308298A
Other languages
Japanese (ja)
Other versions
JP2000108265A (en
Inventor
由美子 鶴田
努 齋藤
幸雄 鈴木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toppan Inc
Original Assignee
Toppan Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toppan Inc filed Critical Toppan Inc
Priority to JP28308298A priority Critical patent/JP4154767B2/en
Publication of JP2000108265A publication Critical patent/JP2000108265A/en
Application granted granted Critical
Publication of JP4154767B2 publication Critical patent/JP4154767B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Finishing Walls (AREA)
  • Laminated Bodies (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、住宅等の建築物の内外装材や、造作材、建具等の建築資材、家具什器類、住設機器や家電製品等の表面化粧に使用するための化粧シートに関するものである。更に詳しくは、平面状基材への貼付は勿論のこと、Vカット加工や凹凸基材へのラッピング、真空成形等の立体成形も可能であり、好ましくは燃焼時に塩化水素等の有毒ガスが発生しない化粧シートに関するものである。
【0002】
【従来の技術】
従来、係る分野で使用される化粧シートとしては、例えば紙の表面に木目等の適宜の所望の絵柄の印刷を施してなる紙系の化粧シートもあったが、これは物理的にも化学的にも強度の弱い紙を使用しているために、表面硬度や耐磨耗性、耐水性や耐溶剤性等の表面物性が劣り、また本質的に多孔質で粗面体である紙の表面に印刷を行うので、印刷された絵柄の鮮鋭度が低く意匠面でも劣ったものであるので、使用可能な用途が限定されたり、高級感の要求される用途には不向きである等の問題を抱えたものであった。
【0003】
これに対し、紙に替えて熱可塑性樹脂からなるフィルム又はシート状体を基材シートとし、その表面又は裏面に木目等の適宜の所望の絵柄の印刷を施してなる樹脂系の化粧シートもあった。これは、前述した紙系の化粧シートにおける物性面や意匠面の問題点を解決した化粧シートであり、要求物性の厳しい用途や高級感の要求される用途を含め、幅広い用途に使用されていた。
【0004】
係る合成樹脂系の化粧シートを構成する合成樹脂材料としては従来、安価で加工適性や物性にも優れたポリ塩化ビニル樹脂が最も多用されて来たが、近年では環境問題に対する社会的な関心の高まりを受けて、環境への悪影響の少ないポリ塩化ビニル樹脂以外の樹脂、例えばポリオレフィン系樹脂を使用した化粧シート等も開発され、実用化されている(特開平6−166159号公報参照)。
【0005】
ところで、上記の様な化粧シートは一般に、例えば合板やパーティクルボード、中密度繊維板等の木質板や、珪酸カルシウム板やスレート板、木毛セメント板等の無機質板、FRP(fiber reinforced plastics)等の各種の基材の表面に貼付されて使用されるものであるが、単に平板状の基材の表面に貼付するのみならず、これにVカット加工等の折り曲げ加工を施したり、或いは凹凸形状を有する基材の表面にラッピング法または真空成形法等の手法により立体成形して貼付して使用する場合もある。特に近年では、消費者の嗜好の多様化によって、各種の特殊な立体形状の化粧部材に対する需要が高まっており、これに伴って化粧シートにも折り曲げ加工性や立体成形性等の二次加工適性が益々強く要請される様になっている。
【0006】
しかるに、ポリ塩化ビニル樹脂以外の樹脂として、例えば通常のポリプロピレン樹脂等を使用した化粧シートは、柔軟性が不足する為に折り曲げ加工時や真空成形時に白化や亀裂、破断、ネッキング等を発生し易いという問題点があった。そこで、係る問題点を解決する目的で、ポリプロピレン樹脂等に軟質モノマーとの共重合やエラストマー等の軟質成分の添加により柔軟性を付与した樹脂を使用したオレフィン系化粧シートも、各種提案されている(特開平9−300554号公報、特開平9−328562号公報、特開平10−17679号公報等参照)。しかし、係る如く柔軟性を付与したオレフィン系化粧シートは、上記した問題点は確かに解決できたものの、シートが柔軟である為に、基材への貼付時のシワや、基材表面の不陸を拾う為の外観不良、真空成形時の加熱により柔軟になり過ぎる為のドローダウンや成形ムラ等の外観不良等の問題が発生しやすいという問題点があった。
【0007】
そこで、この問題を解決する為に、係る軟質のポリオレフィン系樹脂層の両面を、耐熱性や抗張力を有するポリオレフィン系樹脂層で挟持した3層構成の化粧シートも、各種提案されている(特開平7−314621号公報、特開平10−193536号公報、特開平10−193539号公報等参照)。しかしながら、これらの化粧シートも、柔軟性や立体成形性を重視したものであって、表面の耐傷付き性には特段の注意が払われていなかったので、折り曲げ加工性や立体成形性等の二次加工適性は十分に満足であっても、表面の耐傷付き性が不十分であり、実用上問題を抱えたものであった。
【0008】
【発明が解決しようとする課題】
本発明は、従来の技術における以上の様な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、環境への悪影響の少ない化粧シートであって、Vカット加工やラッピング加工等の折り曲げ加工性や、真空成形等の立体成形性に優れ、しかも耐傷付き性にも優れた化粧シートを提供することにある。
【0009】
【課題を解決するための手段】
本発明は、印刷層を設けた熱可塑性樹脂からなる基材シートの、前記印刷層上にアイソタクティックインデックス(沸騰デカン可溶残分)が40%以下である低結晶性ポリオレフィン系樹脂を主成分とする樹脂組成物、または、軟質ゴム成分を添加したポリオレフィン系樹脂を主成分とする樹脂組成物からなる厚みが、20〜150μmの範囲の軟質ポリオレフィン系樹脂層と、アイソタクティックインデックス(沸騰デカン可溶残分)が90%以上である厚みが、5〜20μmの範囲の高結晶性ポリプロピレン樹脂を主成分とする樹脂組成物からなる高結晶性ポリプロピレン系樹脂層からなり、前記軟質ポリオレフィン系樹脂層が高結晶性ポリプロピレン系樹脂層より厚い構成とした2層の共押出しフィルムを、前記軟質ポリオレフィン系樹脂層が前記印刷層側となるように設けたことを特徴とする化粧シートである。
【0011】
【発明の実施の形態】
以下、本発明の具体的な実施の形態について、図面を参照しつつ詳細に説明する。図1〜図6は、それぞれ本発明の化粧シートの一例の積層構造を示す模式断面図である。
【0012】
本発明の化粧シートは、熱可塑性樹脂からなる基材シート1上に、軟質ポリオレフィン系樹脂層2と、高結晶性ポリプロピレン系樹脂層3とを、少なくともこの順に有してなるものであって、上記軟質ポリオレフィン系樹脂層2は、アイソタクティックインデックス(沸騰デカン可溶残分)が40%以下である低結晶性ポリオレフィン系樹脂を主成分とする樹脂組成物、または、軟質ゴム成分を添加したポリオレフィン系樹脂を主成分とする樹脂組成物から構成され、一方、上記高結晶性ポリプロピレン系樹脂層3は、アイソタクティックインデックス(沸騰デカン可溶残分)が90%以上である高結晶性ポリプロピレン樹脂を主成分とする樹脂組成物から構成されてなるものである。
【0013】
図1に示す構成の化粧シートは、上記した本発明の化粧シートにおいて、基材シート1上に、絵柄層4を介して、軟質ポリオレフィン系樹脂層2と、高結晶性ポリプロピレン系樹脂層3とがこの順に積層されて構成されたものである。
【0014】
基材シート1を構成する熱可塑性樹脂の種類には特に制限はなく、従来より係る化粧シートにおける基材シートの構成材料として使用されている任意の熱可塑性樹脂を使用することができる。具体的には例えばポリエチレン、ポリプロピレン、ポリブテン−1、ポリ−4−メチルペンテン−1等のポリオレフィン系樹脂、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート、ポリアリレート、ポリカーボネート等のポリエステル系樹脂、ポリメチルメタクリレート等のアクリル系樹脂、スチレン系樹脂、ポリアミド系樹脂、繊維素誘導体等、又はこれらから選ばれる2種以上の混合物、共重合体、複合体、積層体等を使用することができる。
【0015】
但し、近年社会的に関心が高まりつつある環境問題への対応を考慮すると、ポリ塩化ビニル樹脂等の様なハロゲンを含有する樹脂の使用は好ましくなく、非ハロゲン系の樹脂を使用することが好ましい。中でも、化粧シート用基材としての適度の柔軟性や強度、加工性、耐候性等の諸物性や、環境問題への対応、材料価格等を考慮すると、ポリオレフィン系樹脂が最も望ましい。具体的には、例えば上記したポリエチレン、ポリプロピレン、ポリブテン−1、ポリ−4−メチルペンテン−1等が挙げられ、中でもポリプロピレンであればホモポリプロピレン、ランダムポリプロピレン、ブロックポリプロピレン等を適宜配合したり、それらに更にアタクチックポリプロピレンを適宜添加する等して使用することもできる。
【0016】
また、複数種類のオレフィン単量体の共重合体であっても良く、例えばポリプロピレン系共重合体であれば、プロピレン以外の炭素数2〜20のα−オレフィン、好ましくはエチレン、ブテン−1、4−メチルペンテン−1、ヘキセン−1又はオクテン−1、のコモノマーの1種又は2種以上を15モル%以上共重合させたプロピレン−α−オレフィン共重合体や、これに更にエチレン−α−オレフィン共重合体、エチレン−プロピレン共重合ゴム、エチレン−プロピレン−非共役ジエン共重合ゴム等の改質剤を適宜添加した樹脂組成物等を使用することもできる。
【0017】
内層の軟質ポリオレフィン系樹脂層2は、真空成形等の立体成形時の基材の凹凸形状に追従する為の伸びの確保や、Vカット加工等の折り曲げ加工時の白化や亀裂の防止等の目的で、シートに適度の柔軟性を付与する為に設けられるものであり、その要求上、本発明では、ポリプロピレン樹脂またはポリエチレン樹脂等のポリオレフィン系樹脂であって、アイソタクティックインデックス(沸騰デカン可溶残分)が40%以下の低結晶性ポリオレフィン樹脂を主成分とするか、若しくは、一般のポリプロピレン樹脂またはポリエチレン樹脂等のポリオレフィン系樹脂に、EPR(エチレン−プロピレンゴム)またはEPDM(エチレン−プロピレン−ジエンモノマーエラストマー)等の軟質ゴム成分を添加したものを主成分とする樹脂組成物から構成することが肝要である。
【0018】
最外層の高結晶性ポリプロピレン系樹脂層3を、アイソタクティックインデックスが90%を下回るポリプロピレン樹脂から構成すると、耐傷付き性が不十分であるので、本発明の化粧シートにあっては、該層をアイソタクティックインデックスが90%以上の高結晶性ポリプロピレン樹脂を主成分とする樹脂組成物から構成することが肝要である。なお、高結晶性ポリプロピレン樹脂は押出成形性にやや難点があることから、成形性の改善の為に少量のポリエチレン等を添加することも可能であるが、過剰の添加は耐傷付き性の低下の原因となるので、ポリエチレンの場合はその添加率は15%以下、より好ましくは5%以下とするのが良い。
【0019】
上記各層の厚さには特に制限はないが、図1に示す構成の化粧シートの場合、基材シート1の厚さは一般に20〜300μm程度の範囲から選ばれ、真空成形性を考慮すると特に好ましい範囲は50〜200μm程度である。軟質ポリオレフィン系樹脂層2の厚さは10〜200μm程度、より好ましくは20〜150μm程度、高結晶性ポリプロピレン系樹脂層3の厚さは5〜50μm程度、より好ましくは5〜20μm程度とするのが良い。
【0020】
なお、上記した図1に示す構成の化粧シートにあっては、絵柄層4の表面側にある軟質ポリオレフィン系樹脂層2及び高結晶性ポリプロピレン系樹脂層3は、少なくとも絵柄層4を透視可能な透明性を備えていることが必要であるが、絵柄層4の裏面側に位置する基材シート1は、着色顔料を含有する隠蔽性のシートであっても良い。特に、目的とする化粧シートに被貼着基材に対する隠蔽性が要求される場合には、基材シート1を構成する熱可塑性樹脂に隠蔽性の着色顔料を添加して基材シート1を隠蔽性としておくことが好ましい。
【0021】
上記基材シート1、軟質ポリオレフィン系樹脂層2、高結晶性ポリプロピレン系樹脂層3を構成する樹脂組成物には、必要に応じて例えば酸化防止剤、紫外線吸収剤、光安定剤、熱安定剤、可塑剤、滑剤、帯電防止剤、難燃剤、充填剤等の従来公知の各種の添加剤の1種以上が添加されていても良い。
【0022】
上記化粧シートの製造方法は特に限定されないが、製造工程中における軟質ポリオレフィン系樹脂層2の傷付きを防止し、併せて十分な層間密着性を確保する為には、高結晶性ポリプロピレン系樹脂層3と軟質ポリオレフィン系樹脂層2とを共押出法によりシート状に押し出し、これを該押し出し後速やかに、予め絵柄層4を形成した基材シート1と積層する方法によるのが良い。該積層に際して、基材シート1及び/又は軟質ポリオレフィン系樹脂層2の貼着面に例えばコロナ処理、オゾン処理、プラズマ処理、電離放射線処理、酸処理、アンカー処理又はプライマー処理等の表面処理を施して、密着性を向上することもできる。また、必要に応じて、該積層と同時又は積層後に、高結晶性ポリプロピレン系樹脂層3にエンボスを施すこともでき、特に該積層と同時にエンボスを施すと、エンボス形状の再現性が向上する利点がある。
【0023】
なお、絵柄層4は従来公知の様に、適宜の印刷インキ等を使用して適宜の印刷方法等で設けることができる。必要な場合には、隠蔽性の印刷インキ等を使用した隠蔽層を併せて設けることもできる。また、これら絵柄層4や隠蔽層の形成に先立ち、基材シート1の表面に例えばコロナ処理、オゾン処理、プラズマ処理、電離放射線処理、重クロム酸処理、アンカー処理又はプライマー処理等の表面処理を施すことによって、基材シート1と絵柄層4や隠蔽層との密着性を向上することもできる。
【0024】
本発明の化粧シートにおいて、絵柄層4の位置は、必ずしも基材シート1と軟質ポリオレフィン系樹脂層2との間に限定されるものではなく、目的に応じて任意の箇所に設けることができる。例えば、図2に示す様に、絵柄層4を軟質ポリオレフィン系樹脂層2と高結晶性ポリプロピレン系樹脂層3との間に設けることもできる。係る構成の化粧シートは例えば、予め裏面に絵柄層4を形成した高結晶性ポリプロピレン系樹脂層3の該絵柄層4面に、軟質ポリオレフィン系樹脂層2及び基材シート1を共押出法によって積層することによって製造することができる。
【0025】
また、図3に示す様に、絵柄層4を基材シート1の裏面側に設けた構成とすることもできる。この場合は基材シート1にも、少なくとも絵柄層4を透視可能な透明性が要求される。係る構成の化粧シートの製造方法は特に限定されないが、基材シート1、軟質ポリオレフィン系樹脂層2及び高結晶性ポリプロピレン系樹脂層3からなる3層構成のシートを予め共押出法等で作製しておき、その裏面に絵柄層4を印刷形成する方法によると、3層構成のシートの樹脂層間の良好な密着性が確保され、しかも生産性よく容易に製造できる利点がある。
【0026】
なお、この場合、上記3層構成のシートの反りを防止すると共に、製造工程や後加工工程における裏面側からの傷付きをも防止する必要上、基材シート1を高結晶性ポリプロピレン系樹脂層3と同様、アイソタクティックインデックス(沸騰デカン可溶残分)が90%以上の高結晶性ポリプロピレン樹脂を主成分とする樹脂組成物から構成することが最も好ましい。また、該基材シート1の厚みを、高結晶性ポリプロピレン系樹脂層3と略同程度とすることが好ましい。具体的には、基材シート1及び高結晶性ポリプロピレン系樹脂層3の厚さを5〜50μm程度、軟質ポリオレフィン系樹脂層2の厚さを20〜200μm程度の範囲内とすることが好ましい。
【0027】
一方、上記とは逆に、図4に示す様に、上記した3層構成のシートの表面側、すなわち高結晶性ポリプロピレン系樹脂層3の表面に、絵柄層4を施した構成の化粧シートとすることもできる。この場合には、絵柄層4の保護の為、絵柄層4上に適宜の透明な熱可塑性樹脂からなる表面樹脂層5を設けることが好ましい。表面樹脂層5の材質としては、例えば基材シート1の構成材料として列挙した各種の熱可塑性樹脂を使用することができるが、本発明では特に、表面の耐傷付き性の向上の為、高結晶性ポリプロピレン系樹脂層3を構成する樹脂と同様に、アイソタクティックインデックスが90%以上である高結晶性ポリプロピレン樹脂を主成分とする樹脂組成物を使用することが最も望ましい。なお、この構成においては、3層構成のシート、すなわち基材シート1、軟質ポリオレフィン系樹脂層2及び高結晶性ポリプロピレン系樹脂層3を隠蔽性とすることもできることは言うまでもない。また、この構成にあっては、表面樹脂層5の表面にエンボスを施すことができることも勿論である。
【0028】
上記構成において、表面樹脂層5は単一層であっても良いが、相異なる樹脂層からなる複数層とすることもできる。例えば、図5に示す様に、表面樹脂層5を、軟質ポリオレフィン系樹脂層2と同様の樹脂組成物からなる下地表面樹脂層51と、高結晶性ポリプロピレン系樹脂層3と同様の樹脂組成物からなる上地表面樹脂層52との2層から構成すると、高結晶性ポリプロピレン系樹脂からなる上地表面樹脂層52によって十分な耐傷付き性を確保し、しかも、下地表面樹脂層51及び上地表面樹脂層52によって絵柄層4上の樹脂層に十分な厚みが確保されるので、耐候性、耐磨耗性等の物性や、塗装感、エンボスの深さ等の意匠性を確保できると共に、該上地表面樹脂層52と高結晶性ポリプロピレン系樹脂層3との間に軟質ポリオレフィン系樹脂からなる下地表面樹脂層51が介在することによって、シートに十分な柔軟性や立体成形性を確保することができる。
【0029】
他の構成の例として、図6に示す様に、基材シート1上に、絵柄層4と、第2の高結晶性ポリプロピレン系樹脂層6と、軟質ポリオレフィン系樹脂層2と、高結晶性ポリプロピレン系樹脂層3とを順次設けた構成とすることもできる。この場合は言うまでもなく、第2の高結晶性ポリプロピレン系樹脂層6と、軟質ポリオレフィン系樹脂層2と、高結晶性ポリプロピレン系樹脂層6とは、少なくとも絵柄層4を透視可能な透明性を備えている必要がある。
【0030】
この構成の化粧シートは、第2の高結晶性ポリプロピレン系樹脂層6と、軟質ポリオレフィン系樹脂層2と、高結晶性ポリプロピレン系樹脂層3とからなる3層構成のシートを共押出法により作製しておき、これを後に基材シート1と積層して製造する手順によると、基材シート1との積層方法として例えば基材シート1を溶融押出し積層法により第2の高結晶性ポリプロピレン系樹脂層6面に積層する方法や、予めシート状に製膜された基材シート1をウェットラミネート法、ドライラミネート法又は熱ラミネート法等により積層する方法等から適宜選択することができ、しかも何れの積層方法によっても、製造工程中における軟質ポリオレフィン系樹脂層2の傷付きや3層構成のシートの反り等の問題を発生することがないという利点がある。
【0031】
なお、基材シート1を溶融押出し積層する場合には、絵柄層4は必然的に予め上記した3層構成のシートの第2の高結晶性ポリプロピレン系樹脂層6面に設けておく必要があるが、その他の方法の場合には、第2の高結晶性ポリプロピレン系樹脂層6面に設けておいても基材シート1の表面に設けておいても良い。また、接着性の向上の為に、必要に応じて両者の接着面に適宜の表面処理を施したり、両者の間に接着剤を介在させても良いことは言うまでもない。
【0032】
本発明の化粧シートには、上記の他必要に応じて、機能性の向上の為の各種の処理を施すことができる。例えば、既に述べた表面へのエンボスに加えて、該エンボスの凹部にワイピング法等により着色剤を充填することもできるし、表面物性の向上や艶調整を目的としたトップコートや、艶変化による視覚的立体感を目的とした艶有又は艶消模様層等を表面に設けることもできる。また、裏面には、被貼着基材への貼付に使用するラミネート用接着剤との接着性を向上する目的で、表面の濡れ性に優れた樹脂組成物からなる適宜のプライマー層を設けておくこともできる。
【0033】
【実施例】
以下に、本発明の化粧シートの具体的な実施例を挙げ、本発明を更に詳細に説明する。
【0034】
[実施例1]
無機顔料及び有機顔料を添加した着色ポリプロピレン樹脂を押出機で厚さ120μmに押出して基材シートを製膜し、その両面にコロナ処理を施して濡れ指数を38dyn/cm以上に調整した。
【0035】
次に、上記基材シートに、隠蔽性の無機顔料(酸化鉄系茶、酸化鉄系黄土及び酸化チタン系白)を主体に少量のカーボンブラック、コバルトブルー及びフタロシアニンブルーを混合した顔料組成物を含有するウレタン樹脂系インキにてグラビア印刷法により隠蔽ベタ層を印刷形成し、次に、通常の建材用ウレタン系グラビア印刷インキにてグラビア印刷法により木目の絵柄を印刷し、更に熱可塑性ウレタン系アンカー剤を乾燥後の塗布量6μmに塗工した。
【0036】
次に、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアイソタクティックインデックス(沸騰デカン可溶残分)が10%の低結晶性ポリプロピレンを主成分とする軟質ポリオレフィン系樹脂層80μmと、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアイソタクティックインデックス(沸騰デカン可溶残分)が94%の高結晶性ポリプロピレンを主成分とする高結晶性ポリプロピレン系樹脂層10μmとの2層からなる透明樹脂層を、共押出法によりシート状に製膜し、その軟質ポリオレフィン系樹脂層面にオゾン処理を、高結晶性ポリプロピレン系樹脂層面にコロナ処理を施して表面の濡れ指数を38dyn/cm以上に調整し、軟質ポリオレフィン系樹脂面を上記基材シートのアンカー剤塗工面に、圧力25kgf/cm2、ラインスピード20m/minの条件で共押出しラミネートした。
【0037】
次に、透明樹脂層上に、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアクリレート系紫外線硬化樹脂を厚み20μmにコーティングした。次に、180℃の金属製エンボスロールにて導管柄のエンボスを施した。しかる後、基材シートの裏面にコロナ処理を施して濡れ指数を38dyn/cm以上に調整し、シリカ粉末を配合したウレタン樹脂系プライマー剤をグラビアコート法にて乾燥後の塗布量1g/m2に施してプライマー層を形成して、本発明の化粧シートを完成した。
【0038】
得られた化粧シートを曲率半径0.5の形状のポリエステル樹脂系3次元基材に水性2液ウレタン系接着剤を10g/m2(dry)スプレー塗装、乾燥した後、シート温度を80℃にして3次元ラミネートした。得られた化粧板の耐傷つき性は鉛筆硬度で2Hあり、ホフマンスクラッチ1000gでも傷が付かなかった。表面白化、割れのない耐傷つき性の良い化粧板を得た。
【0039】
[実施例2]
無機顔料及び有機顔料を添加した着色ポリプロピレン樹脂を押出機で厚さ120μmに押出して基材シートを製膜し、その両面にコロナ処理を施して濡れ指数を38dyn/cm以上に調整した。
【0040】
次に、上記基材シートに、隠蔽性の無機顔料(酸化鉄系茶、酸化鉄系黄土及び酸化チタン系白)を主体に少量のカーボンブラック、コバルトブルー及びフタロシアニンブルーを混合した顔料組成物を含有するウレタン樹脂系インキにてグラビア印刷法により隠蔽ベタ層を印刷形成し、次に、通常の建材用ウレタン系グラビア印刷インキにてグラビア印刷法により木目の絵柄を印刷し、更に熱可塑性ウレタン系アンカー剤を乾燥後の塗布量6μmに塗工した。
【0041】
次に、EPDM(エチレン−プロピレン−ジエンモノマーエラストマー)30重量部、アイソタクチックインデックス90%のポリプロピレン樹脂60重量部及びアイソタクチックインデックス90%のポリエチレン樹脂10重量部に、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加した軟質ポリオレフィン系樹脂層80μmと、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアイソタクティックインデックス(沸騰デカン可溶残分)が94%の高結晶性ポリプロピレンを主成分とする高結晶性ポリプロピレン系樹脂層10μmとの2層からなる透明樹脂層を、共押出法によりシート状に製膜し、その軟質ポリオレフィン系樹脂層面にオゾン処理を、高結晶性ポリプロピレン系樹脂層面にコロナ処理を施して表面の濡れ指数を38dyn/cm以上に調整し、軟質ポリオレフィン系樹脂層面を上記基材シートのアンカー剤塗工面に、圧力25kgf/cm2、ラインスピード20m/minの条件で共押出しラミネートした。
【0042】
次に、透明樹脂層上に、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアクリレート系紫外線硬化樹脂を厚み20μmにコーティングした。次に、180℃の金属製エンボスロールにて導管柄のエンボスを施し化粧シートを得た。しかる後、基材シートの裏面にコロナ処理を施して濡れ指数を38dyn/cm以上に調整し、シリカ粉末を配合したウレタン樹脂系プライマー剤をグラビアコート法にて乾燥後の塗布量1g/m2に施してプライマー層を形成して、本発明の化粧シートを完成した。
【0043】
得られた化粧シートを曲率半径0.5の形状のポリエステル樹脂系3次元基材に水性2液ウレタン系接着剤を10g/m2(dry)スプレー塗装、乾燥した後、シート温度を80℃にして3次元ラミネートした。得られた化粧板の耐傷つき性は鉛筆硬度で2Hあり、ホフマンスクラッチ1000gでも傷が付かなかった。表面白化、割れのない耐傷つき性の良い化粧板を得た。
【0044】
[参考例1]
光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアイソタクティックインデックス(沸騰デカン可溶残分)が94%の高結晶性ポリプロピレン樹脂を主成分とする基材シート20μmと、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアイソタクティックインデックス(沸騰デカン可溶残分)が10%の低結晶性ポリプロピレンを主成分とする軟質ポリオレフィン系樹脂層120μmと、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアイソタクティックインデックス(沸騰デカン可溶残分)が94%の高結晶性ポリプロピレンを主成分とする高結晶性ポリプロピレン系樹脂層20μmとを、3層共押出し製膜し、厚み160μmの透明樹脂層を得た。製膜後に両面にコロナ処理を施して表面の濡れ指数を38dyn/cm以上に活性化させた。
【0045】
次に、該透明樹脂層上に、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアクリレート系紫外線硬化樹脂を厚み20μmにコーティングした。次に、180℃の金属製エンボスロールにて導管柄のエンボスを施した。しかる後、基材シートの裏面にコロナ処理を施して濡れ指数を38dyn/cm以上に調整し、通常の建材用ウレタン系グラビア印刷インキにてグラビア印刷法により木目の絵柄を印刷し、更に、隠蔽性の無機顔料(酸化鉄系茶、酸化鉄系黄土及び酸化チタン系白)を主体に少量のカーボンブラック、コバルトブルー及びフタロシアニンブルーを混合した顔料組成物を含有するウレタン樹脂系インキにてグラビア印刷法により隠蔽ベタ層を印刷形成して、本発明の化粧シートを完成した。
【0046】
得られた化粧シートを曲率半径0.5の形状のポリエステル樹脂系3次元基材に水性2液ウレタン系接着剤を10g/m2(dry)スプレー塗装、乾燥した後、シート温度を80℃にして3次元ラミネートした。得られた化粧板の耐傷つき性は鉛筆硬度で2Hあり、ホフマンスクラッチ1000gでも傷が付かなかった。表面白化、割れのない耐傷つき性の良い化粧板を得た。
【0047】
[実施例3
アイソタクティックインデックス(沸騰デカン可溶残分)が94%の高結晶性ポリプロピレンを主成分とし、無機顔料及び有機顔料を添加して着色した高結晶性ポリプロピレン系樹脂からなる基材シート10μmと、EPDM(エチレン−プロピレン−ジエンモノマーエラストマー)30重量部、アイソタクチックインデックス90%のポリプロピレン樹脂60重量部及びアイソタクチックインデックス90%のポリエチレン樹脂10重量部に、無機顔料及び有機顔料を添加して着色した軟質ポリオレフィン系樹脂層80μmと、アイソタクティックインデックス(沸騰デカン可溶残分)が94%の高結晶性ポリプロピレンを主成分とし、無機顔料及び有機顔料を添加して着色した高結晶性ポリプロピレン系樹脂層10μmとを、3層共押出し製膜し、厚み100μmの着色樹脂層を得た。製膜後に両面にコロナ処理を施して表面を38dyn/cm以上に活性化させた。
【0048】
次に、前記着色樹脂層の表面(高結晶性ポリプロピレン系樹脂層面)に、隠蔽性の無機顔料(酸化鉄系茶、酸化鉄系黄土及び酸化チタン系白)を主体に少量のカーボンブラック、コバルトブルー及びフタロシアニンブルーを混合した顔料組成物を含有するウレタン樹脂系インキにてグラビア印刷法により隠蔽ベタ層を印刷形成し、次に、通常の建材用ウレタン系グラビア印刷インキにてグラビア印刷法により木目の絵柄を印刷し、更に、熱可塑性ウレタン系アンカー剤を乾燥後の厚み6μmに塗工した。
【0049】
次に、EPDM(エチレン−プロピレン−ジエンモノマーエラストマー)30重量部、アイソタクチックインデックス90%のポリプロピレン樹脂60重量部及びアイソタクチックインデックス90%のポリエチレン樹脂10重量部に、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加した軟質ポリオレフィン系樹脂層80μmと、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアイソタクティックインデックス(沸騰デカン可溶残分)が94%の高結晶性ポリプロピレンを主成分とする高結晶性ポリプロピレン系樹脂層10μmとの2層からなる透明樹脂層を、共押出法によりシート状に製膜し、その軟質ポリオレフィン系樹脂層面にオゾン処理を、高結晶性ポリプロピレン系樹脂層面にコロナ処理を施して表面の濡れ指数を38dyn/cm以上に調整し、軟質ポリオレフィン系樹脂層面を上記着色樹脂層のアンカー剤塗工面に、圧力25kgf/cm2、ラインスピード20m/minの条件で共押出しラミネートした。
【0050】
次に、前記透明樹脂層の表面に、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアクリレート系紫外線硬化樹脂を厚さ20μmにコーティングした。次に、180℃の金属製エンボスロールにて導管柄のエンボスを施した。しかる後、基材シートの裏面にコロナ処理を施して濡れ指数を38dyn/cm以上に調整し、シリカ粉末を配合したウレタン樹脂系プライマー剤をグラビアコート法にて乾燥後の塗布量1g/m2に施してプライマー層を形成して、本発明の化粧シートを完成した。
【0051】
得られた化粧シートを曲率半径0.5の形状のポリエステル樹脂系3次元基材に水性2液ウレタン系接着剤を10g/m2(dry)スプレー塗装、乾燥した後、シート温度を80℃にして3次元ラミネートした。得られた化粧板の耐傷つき性は鉛筆硬度で2Hあり、ホフマンスクラッチ1000gでも傷が付かなかった。表面白化、割れのない耐傷つき性の良い化粧板を得た。
【0052】
[参考例2]
光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアイソタクティックインデックス(沸騰デカン可溶残分)が10%の低結晶性ポリプロピレンを主成分とする軟質ポリオレフィン系樹脂層80μmの表裏に、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアイソタクティックインデックス(沸騰デカン可溶残分)が94%の高結晶性ポリプロピレンを主成分とするポリオレフィン系樹脂層が10μmの厚みとなる様に、3層共押出し製膜し、厚み100μmの透明樹脂層を得た。製膜後に両面にコロナ処理を施して表面の濡れ指数を38dyn/cm以上に活性化させた。
【0053】
次に、無機顔料及び有機顔料を添加した着色ポリプロピレン樹脂を押出機で厚さ120μmに押出して基材シートを製膜し、その両面にコロナ処理を施して濡れ指数を38dyn/cm以上に調整した。
【0054】
次に、上記基材シートに、隠蔽性の無機顔料(酸化鉄系茶、酸化鉄系黄土及び酸化チタン系白)を主体に少量のカーボンブラック、コバルトブルー及びフタロシアニンブルーを混合した顔料組成物を含有するウレタン樹脂系インキにてグラビア印刷法により隠蔽ベタ層を印刷形成し、次に、通常の建材用ウレタン系グラビア印刷インキにてグラビア印刷法により木目の絵柄を印刷し、更に熱可塑性ウレタン系アンカー剤を乾燥後の塗布量6μmに塗工した後、該塗工面に前記透明樹脂層を、2液ウレタン系ドライラミネート用接着剤を介して、温度120℃、圧力25kgf/cm2、ラインスピード20m/minの条件でドライラミネートした。
【0055】
次に、前記透明樹脂層上に、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアクリレート系紫外線硬化樹脂を厚み20μmにコーティングした。次に、180℃の金属製エンボスロールにて導管柄のエンボスを施した。しかる後、基材シートの裏面にコロナ処理を施して濡れ指数を38dyn/cm以上に調整し、シリカ粉末を配合したウレタン樹脂系プライマー剤をグラビアコート法にて乾燥後の塗布量1g/m2に施してプライマー層を形成して、本発明の化粧シートを完成した。
【0056】
得られた化粧シートを曲率半径0.5の形状のポリエステル樹脂系3次元基材に水性2液ウレタン系接着剤を10g/m2(dry)スプレー塗装、乾燥した後、シート温度を80℃にして3次元ラミネートした。得られた化粧板の耐傷つき性は鉛筆硬度で2Hあり、ホフマンスクラッチ1000gでも傷が付かなかった。表面白化、割れのない耐傷つき性の良い化粧板を得た。
【0057】
参考例3
EPDM(エチレン−プロピレン−ジエンモノマーエラストマー)30重量部、アイソタクチックインデックス90%のポリプロピレン樹脂60重量部及びアイソタクチックインデックス90%のポリエチレン樹脂10重量部に、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加した軟質ポリオレフィン系樹脂層80μmの表裏に、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアイソタクティックインデックス(沸騰デカン可溶残分)が94%の高結晶性ポリプロピレンを主成分とする高結晶性ポリプロピレン系樹脂層がそれぞれ10μmの厚みとなる様に、3層共押出し製膜し、厚み100μmの透明樹脂層を作製した。製膜後にコロナ処理を施して表面を38dyn/cm以上に活性化させた。
【0058】
次に、前記透明樹脂層の裏面に、通常の建材用ウレタン系グラビア印刷インキにてグラビア印刷法により木目の絵柄を印刷し、次に、隠蔽性の無機顔料(酸化鉄系茶、酸化鉄系黄土及び酸化チタン系白)を主体に少量のカーボンブラック、コバルトブルー及びフタロシアニンブルーを混合した顔料組成物を含有するウレタン樹脂系インキにてグラビア印刷法により隠蔽ベタ層を印刷形成し、更に、熱可塑性ウレタン系アンカー剤を乾燥後の厚み6μmに塗工した。
【0059】
次に、無機顔料及び有機顔顔料を添加した着色ポリプロピレン樹脂を押出機で厚さ120μmに押出し製膜しながら片面にオゾン処理、もう一方の面にコロナ処理を施して濡れ指数を38dyn/cm以上に調整し、該オゾン処理面を前記透明樹脂層のアンカー剤塗布面に、圧力25kgf/cm2、ラインスピード20m/minの条件で押出しラミネートした。次に、前記透明樹脂層の表面に、光安定剤0.2重量%及び紫外線吸収剤0.3重量%を添加したアクリレート系紫外線硬化樹脂を厚さ20μmにコーティングした。次に、180℃の金属製エンボスロールにて導管柄のエンボスを施した。しかる後、基材シートの裏面にコロナ処理を施して濡れ指数を38dyn/cm以上に調整し、シリカ粉末を配合したウレタン樹脂系プライマー剤をグラビアコート法にて乾燥後の塗布量1g/m2に施してプライマー層を形成して、本発明の化粧シートを完成した。
【0060】
得られた化粧シートを曲率半径0.5の形状のポリエステル樹脂系3次元基材に水性2液ウレタン系接着剤を10g/m2(dry)スプレー塗装、乾燥した後、シート温度を80℃にして3次元ラミネートした。得られた化粧板の耐傷つき性は鉛筆硬度で2Hあり、ホフマンスクラッチ1000gでも傷が付かなかった。表面白化、割れのない耐傷つき性の良い化粧板を得た。
【0061】
【発明の効果】
以上詳細に説明した様に、本発明の化粧シートは、平面状基材へのラミネートは勿論のこと、立体形状の基材へのラッピングラミネートや真空成形等による3次元立体成形を行っても、割れや白化、シワ等が発生することがなく、しかも表面の耐傷付き性に優れた化粧材を得ることができる。
【図面の簡単な説明】
【図1】本発明の化粧シートの一例の積層構造を示す模式断面図である。
【図2】本発明の化粧シートの一例の積層構造を示す模式断面図である。
【図3】本発明の化粧シートの一例の積層構造を示す模式断面図である。
【図4】本発明の化粧シートの一例の積層構造を示す模式断面図である。
【図5】本発明の化粧シートの一例の積層構造を示す模式断面図である。
【図6】本発明の化粧シートの一例の積層構造を示す模式断面図である。
【符号の説明】
1‥‥基材シート
2‥‥軟質ポリオレフィン系樹脂層
3‥‥高結晶性ポリプロピレン系樹脂層
4‥‥絵柄層
5‥‥表面樹脂層
51‥‥下地表面樹脂層
52‥‥上地表面樹脂層
6‥‥第2の高結晶性ポリプロピレン系樹脂層
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a decorative sheet for use in surface makeup of interior and exterior materials of buildings such as houses, building materials such as construction materials and fittings, furniture fixtures, housing equipment, and home appliances. More specifically, it can be applied to a flat substrate, as well as V-cut processing, lapping to an uneven substrate, and three-dimensional molding such as vacuum molding. Preferably, toxic gases such as hydrogen chloride are generated during combustion. It does not relate to the decorative sheet.
[0002]
[Prior art]
Conventionally, as a decorative sheet used in such a field, for example, there has been a paper-based decorative sheet obtained by printing a desired pattern such as wood grain on the surface of paper. In addition, low-strength paper is used, so surface properties such as surface hardness, abrasion resistance, water resistance and solvent resistance are poor, and the surface of the paper is essentially porous and rough. Since printing is performed, the sharpness of the printed pattern is low and the design is inferior, so there are problems such as limited usable applications and unsuitable for applications that require a high-class feeling. It was.
[0003]
On the other hand, there is also a resin-type decorative sheet in which a film or sheet made of a thermoplastic resin is used as a base sheet instead of paper, and an appropriate desired pattern such as wood grain is printed on the front or back surface. It was. This is a decorative sheet that solves the problems of the physical properties and design of the paper-based decorative sheet described above, and was used in a wide range of applications, including applications that demand strict physical properties and applications that require a high-class feel. .
[0004]
As a synthetic resin material constituting such a synthetic resin-based decorative sheet, conventionally, polyvinyl chloride resin which is inexpensive and excellent in processability and physical properties has been most frequently used, but in recent years, there has been a social interest in environmental problems. In response to this increase, resins other than polyvinyl chloride resin that have little adverse effects on the environment, such as decorative sheets using polyolefin resins, have been developed and put into practical use (see JP-A-6-166159).
[0005]
By the way, the decorative sheets as described above are generally made of wood board such as plywood, particle board, medium density fiber board, inorganic board such as calcium silicate board, slate board, wood cement board, FRP (fiber reinforced plastics), etc. It is used by being affixed to the surface of various types of base materials, but it is not only simply affixed to the surface of a flat base material, but it can also be subjected to bending processing such as V-cut processing, or an uneven shape. In some cases, it is used after three-dimensionally forming and sticking to the surface of a substrate having a solid by means of a wrapping method or a vacuum forming method. In recent years, in particular, due to the diversification of consumer preferences, demand for decorative members with various special three-dimensional shapes has increased, and along with this, secondary processing suitability such as folding processability and three-dimensional formability is also applied to decorative sheets. Is increasingly demanded.
[0006]
However, a decorative sheet using, for example, a normal polypropylene resin as a resin other than polyvinyl chloride resin is not flexible enough to easily cause whitening, cracks, breakage, necking, etc. during bending or vacuum forming. There was a problem. Therefore, for the purpose of solving such problems, various types of olefin-based decorative sheets using a resin imparted with flexibility by copolymerizing with a soft monomer or adding a soft component such as an elastomer to a polypropylene resin have been proposed. (See JP-A-9-300554, JP-A-9-328562, JP-A-10-17679, etc.). However, the olefin-based decorative sheet provided with flexibility as described above has certainly solved the above-mentioned problems, but because the sheet is flexible, it is not wrinkled when applied to the base material and the surface of the base material is not damaged. There were problems such as poor appearance for picking up the land, and poor appearance such as drawdown and molding unevenness due to excessive flexibility due to heating during vacuum forming.
[0007]
In order to solve this problem, various types of decorative sheets having a three-layer structure in which both surfaces of the soft polyolefin resin layer are sandwiched between polyolefin resin layers having heat resistance and tensile strength have been proposed (Japanese Patent Laid-Open No. Hei. 7-314621, JP-A-10-193536, JP-A-10-193539, etc.). However, these decorative sheets also attach great importance to flexibility and three-dimensional formability, and no particular attention has been paid to the scratch resistance of the surface. Even if the suitability for the next processing was sufficiently satisfactory, the scratch resistance of the surface was insufficient, and there were problems in practical use.
[0008]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-described problems in the prior art, and the object of the present invention is a decorative sheet that has less adverse effects on the environment, such as V-cut processing and lapping processing. An object of the present invention is to provide a decorative sheet having excellent bending workability such as vacuum forming, three-dimensional formability such as vacuum forming, and excellent scratch resistance.
[0009]
[Means for Solving the Problems]
  The present invention mainly uses a low crystalline polyolefin-based resin having an isotactic index (boiling decane soluble residue) of 40% or less on the printed layer of a base sheet made of a thermoplastic resin provided with a printed layer. It consists of a resin composition as a component, or a resin composition mainly composed of a polyolefin resin to which a soft rubber component is added.The thickness is in the range of 20 to 150 μmSoft polyolefin resin layer and isotactic index (boiling decane soluble residue) is 90% or moreThe thickness is in the range of 5-20 μmHighly crystalline polypropylene resin layer comprising a resin composition mainly composed of highly crystalline polypropylene resinWhenAnd the soft polyolefin resin layer is thicker than the highly crystalline polypropylene resin layer.Two layersThe decorative sheet is characterized in that a co-extruded film is provided so that the soft polyolefin-based resin layer is on the printed layer side.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. 1 to 6 are schematic cross-sectional views each showing a laminated structure of an example of the decorative sheet of the present invention.
[0012]
The decorative sheet of the present invention has a soft polyolefin-based resin layer 2 and a highly crystalline polypropylene-based resin layer 3 at least in this order on a base sheet 1 made of a thermoplastic resin, The soft polyolefin resin layer 2 is added with a resin composition mainly composed of a low crystalline polyolefin resin having an isotactic index (boiling decane soluble residue) of 40% or less, or a soft rubber component. The highly crystalline polypropylene resin layer 3 is composed of a resin composition containing a polyolefin resin as a main component, while the highly crystalline polypropylene resin layer 3 has an isotactic index (boiling decane soluble residue) of 90% or more. It is comprised from the resin composition which has resin as a main component.
[0013]
The decorative sheet having the structure shown in FIG. 1 is the above-described decorative sheet of the present invention, on the base sheet 1 via the pattern layer 4, the soft polyolefin resin layer 2, the highly crystalline polypropylene resin layer 3, and Are stacked in this order.
[0014]
There is no restriction | limiting in particular in the kind of thermoplastic resin which comprises the base material sheet 1, The arbitrary thermoplastic resins conventionally used as a constituent material of the base material sheet in the decorative sheet which concerns can be used. Specifically, for example, polyolefin resins such as polyethylene, polypropylene, polybutene-1, and poly-4-methylpentene-1, polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyarylate, and polycarbonate, polymethyl An acrylic resin such as methacrylate, a styrene resin, a polyamide resin, a fiber derivative, or a mixture of two or more selected from these, a copolymer, a composite, a laminate, and the like can be used.
[0015]
However, in consideration of the response to environmental problems that have been increasing social interest in recent years, it is not preferable to use a resin containing halogen such as polyvinyl chloride resin, and it is preferable to use a non-halogen resin. . Of these, polyolefin resins are most desirable in view of various physical properties such as moderate flexibility, strength, workability, weather resistance, etc. as a decorative sheet substrate, response to environmental problems, material prices, and the like. Specifically, for example, the above-mentioned polyethylene, polypropylene, polybutene-1, poly-4-methylpentene-1, and the like can be mentioned. Among them, if polypropylene, homopolypropylene, random polypropylene, block polypropylene, etc. can be appropriately blended, or these In addition, atactic polypropylene can be added as appropriate.
[0016]
Further, it may be a copolymer of a plurality of types of olefin monomers. For example, if it is a polypropylene copolymer, it is an α-olefin having 2 to 20 carbon atoms other than propylene, preferably ethylene, butene-1, A propylene-α-olefin copolymer obtained by copolymerizing one or more of 4-methylpentene-1, hexene-1 or octene-1 comonomer with 15 mol% or more, and further ethylene-α- A resin composition to which a modifier such as an olefin copolymer, an ethylene-propylene copolymer rubber, an ethylene-propylene-nonconjugated diene copolymer rubber or the like is appropriately added can also be used.
[0017]
The inner layer of the flexible polyolefin resin layer 2 is intended to ensure elongation to follow the uneven shape of the base material during three-dimensional molding such as vacuum molding, and to prevent whitening and cracking during bending processing such as V-cut processing. The sheet is provided in order to give the sheet appropriate flexibility. According to the requirement, the present invention is a polyolefin resin such as a polypropylene resin or a polyethylene resin, and has an isotactic index (boiling decane soluble). (Residue) of 40% or less of low crystalline polyolefin resin as a main component, or polyolefin resin such as general polypropylene resin or polyethylene resin, EPR (ethylene-propylene rubber) or EPDM (ethylene-propylene-) Resin composition comprising as a main component a soft rubber component such as diene monomer elastomer) It is important to al structure.
[0018]
When the outermost highly crystalline polypropylene-based resin layer 3 is made of a polypropylene resin having an isotactic index of less than 90%, the scratch resistance is insufficient. Therefore, in the decorative sheet of the present invention, the layer It is important to form a resin composition mainly composed of a highly crystalline polypropylene resin having an isotactic index of 90% or more. In addition, since a highly crystalline polypropylene resin has some difficulty in extrusion moldability, it is possible to add a small amount of polyethylene or the like to improve moldability, but excessive addition reduces the scratch resistance. For this reason, in the case of polyethylene, the addition rate is 15% or less, more preferably 5% or less.
[0019]
The thickness of each layer is not particularly limited. However, in the case of the decorative sheet having the configuration shown in FIG. 1, the thickness of the base sheet 1 is generally selected from the range of about 20 to 300 μm, and particularly considering vacuum formability. A preferred range is about 50 to 200 μm. The thickness of the flexible polyolefin resin layer 2 is about 10 to 200 μm, more preferably about 20 to 150 μm, and the thickness of the highly crystalline polypropylene resin layer 3 is about 5 to 50 μm, more preferably about 5 to 20 μm. Is good.
[0020]
In the decorative sheet having the configuration shown in FIG. 1, the soft polyolefin resin layer 2 and the highly crystalline polypropylene resin layer 3 on the surface side of the pattern layer 4 can see through at least the pattern layer 4. Although it is necessary to have transparency, the base material sheet 1 located on the back side of the pattern layer 4 may be a concealing sheet containing a color pigment. In particular, when the target decorative sheet is required to conceal the base material to be adhered, the base sheet 1 is concealed by adding a concealing color pigment to the thermoplastic resin constituting the base sheet 1. It is preferable to keep it.
[0021]
For the resin composition constituting the base sheet 1, the soft polyolefin resin layer 2, and the highly crystalline polypropylene resin layer 3, for example, an antioxidant, an ultraviolet absorber, a light stabilizer, a heat stabilizer may be used as necessary. In addition, one or more of various conventionally known additives such as plasticizers, lubricants, antistatic agents, flame retardants, and fillers may be added.
[0022]
Although the manufacturing method of the said decorative sheet is not specifically limited, In order to prevent the damage of the soft polyolefin-type resin layer 2 in a manufacturing process, and to ensure sufficient interlayer adhesiveness together, a highly crystalline polypropylene-type resin layer 3 and the soft polyolefin-based resin layer 2 may be extruded into a sheet by a co-extrusion method, and this may be laminated immediately with the base sheet 1 on which the pattern layer 4 has been formed immediately after the extrusion. At the time of the lamination, surface treatment such as corona treatment, ozone treatment, plasma treatment, ionizing radiation treatment, acid treatment, anchor treatment or primer treatment is performed on the bonding surface of the base sheet 1 and / or the flexible polyolefin resin layer 2. In addition, adhesion can be improved. Further, if necessary, embossing can be performed on the highly crystalline polypropylene resin layer 3 simultaneously with or after the lamination, and particularly when embossing is performed at the same time as the lamination, an advantage that the reproducibility of the embossed shape is improved. There is.
[0023]
The pattern layer 4 can be provided by an appropriate printing method using an appropriate printing ink or the like as conventionally known. If necessary, a concealing layer using a concealing printing ink or the like can also be provided. Prior to the formation of the pattern layer 4 and the concealing layer, the surface of the base sheet 1 is subjected to surface treatment such as corona treatment, ozone treatment, plasma treatment, ionizing radiation treatment, dichromate treatment, anchor treatment or primer treatment. By applying, adhesion between the base sheet 1 and the pattern layer 4 or the concealing layer can be improved.
[0024]
In the decorative sheet of the present invention, the position of the pattern layer 4 is not necessarily limited between the base sheet 1 and the soft polyolefin resin layer 2 and can be provided at any location according to the purpose. For example, as shown in FIG. 2, the pattern layer 4 may be provided between the soft polyolefin resin layer 2 and the highly crystalline polypropylene resin layer 3. The decorative sheet having such a structure is formed by, for example, laminating the soft polyolefin-based resin layer 2 and the base sheet 1 by co-extrusion on the surface of the pattern layer 4 of the highly crystalline polypropylene-based resin layer 3 in which the pattern layer 4 is previously formed on the back surface. Can be manufactured.
[0025]
Moreover, as shown in FIG. 3, it can also be set as the structure which provided the pattern layer 4 in the back surface side of the base material sheet 1. FIG. In this case, the base sheet 1 is also required to be transparent so that at least the pattern layer 4 can be seen through. The manufacturing method of the decorative sheet having such a structure is not particularly limited, but a sheet having a three-layer structure including the base sheet 1, the soft polyolefin resin layer 2, and the highly crystalline polypropylene resin layer 3 is prepared in advance by a coextrusion method or the like. In addition, according to the method of printing the pattern layer 4 on the back surface, there is an advantage that good adhesion between the resin layers of the three-layered sheet is ensured, and that it can be easily manufactured with high productivity.
[0026]
In this case, the base sheet 1 is made of a highly crystalline polypropylene resin layer in order to prevent warping of the sheet having the above three-layer structure and to prevent scratches from the back side in the manufacturing process and post-processing process. As in No. 3, it is most preferable to use a resin composition mainly composed of a highly crystalline polypropylene resin having an isotactic index (boiling decane soluble residue) of 90% or more. Moreover, it is preferable that the thickness of the base sheet 1 is approximately the same as that of the highly crystalline polypropylene resin layer 3. Specifically, it is preferable that the thickness of the base sheet 1 and the highly crystalline polypropylene resin layer 3 is in the range of about 5 to 50 μm, and the thickness of the soft polyolefin resin layer 2 is in the range of about 20 to 200 μm.
[0027]
On the other hand, contrary to the above, as shown in FIG. 4, a decorative sheet having a structure in which a pattern layer 4 is applied to the surface side of the above-described three-layered sheet, that is, the surface of the highly crystalline polypropylene resin layer 3; You can also In this case, in order to protect the picture layer 4, it is preferable to provide a surface resin layer 5 made of a suitable transparent thermoplastic resin on the picture layer 4. As the material of the surface resin layer 5, for example, various thermoplastic resins listed as the constituent material of the base sheet 1 can be used. In the present invention, in order to improve the scratch resistance of the surface, high crystallinity can be used. It is most desirable to use a resin composition whose main component is a highly crystalline polypropylene resin having an isotactic index of 90% or more, similarly to the resin constituting the conductive polypropylene resin layer 3. In this configuration, it goes without saying that the three-layered sheet, that is, the base sheet 1, the soft polyolefin-based resin layer 2, and the highly crystalline polypropylene-based resin layer 3, can be concealed. Of course, in this configuration, the surface of the surface resin layer 5 can be embossed.
[0028]
In the above configuration, the surface resin layer 5 may be a single layer, or may be a plurality of layers made of different resin layers. For example, as shown in FIG. 5, the surface resin layer 5 is composed of a base surface resin layer 51 made of the same resin composition as the soft polyolefin resin layer 2 and a resin composition similar to the highly crystalline polypropylene resin layer 3. When the upper surface resin layer 52 is made of two layers, the upper surface resin layer 52 made of a highly crystalline polypropylene resin ensures sufficient scratch resistance, and the underlying surface resin layer 51 and the upper surface resin layer 52 are formed. Since the surface resin layer 52 ensures a sufficient thickness for the resin layer on the pattern layer 4, it is possible to ensure physical properties such as weather resistance and wear resistance, and design properties such as coating feeling and emboss depth, The base surface resin layer 51 made of a soft polyolefin resin is interposed between the upper surface resin layer 52 and the highly crystalline polypropylene resin layer 3, thereby ensuring sufficient flexibility and three-dimensional moldability for the sheet. Door can be.
[0029]
As an example of another configuration, as shown in FIG. 6, a pattern layer 4, a second highly crystalline polypropylene resin layer 6, a soft polyolefin resin layer 2, and a high crystallinity are formed on a substrate sheet 1. It can also be set as the structure which provided the polypropylene resin layer 3 sequentially. In this case, needless to say, the second highly crystalline polypropylene resin layer 6, the soft polyolefin resin layer 2, and the highly crystalline polypropylene resin layer 6 have transparency that allows at least the pattern layer 4 to be seen through. Need to be.
[0030]
The decorative sheet having this configuration is prepared by co-extrusion with a three-layered sheet composed of the second highly crystalline polypropylene resin layer 6, the soft polyolefin resin layer 2, and the highly crystalline polypropylene resin layer 3. According to the procedure of laminating with the base sheet 1 later, the second highly crystalline polypropylene resin is obtained by, for example, melt extrusion laminating the base sheet 1 as a stacking method with the base sheet 1. The method can be appropriately selected from a method of laminating on the surface of the layer 6, a method of laminating the base sheet 1 previously formed into a sheet shape by a wet laminating method, a dry laminating method, a thermal laminating method, etc. Even with the lamination method, there is an advantage that problems such as scratches on the flexible polyolefin-based resin layer 2 and warping of the sheet having a three-layer structure during the manufacturing process do not occur. That.
[0031]
When the base sheet 1 is melt-extruded and laminated, the pattern layer 4 must be provided on the surface of the second highly crystalline polypropylene resin layer 6 of the above-described three-layer sheet. However, in other methods, it may be provided on the surface of the second highly crystalline polypropylene resin layer 6 or on the surface of the base sheet 1. Needless to say, in order to improve adhesiveness, an appropriate surface treatment may be applied to the adhesive surfaces of the two as required, or an adhesive may be interposed between the two.
[0032]
In addition to the above, the decorative sheet of the present invention can be subjected to various treatments for improving functionality. For example, in addition to the previously mentioned embossing on the surface, the embossed recess can be filled with a colorant by a wiping method or the like, or a top coat for the purpose of improving surface properties or adjusting gloss, or by changing the gloss A glossy or matte pattern layer or the like for the purpose of visual stereoscopic effect can also be provided on the surface. In addition, an appropriate primer layer made of a resin composition having excellent surface wettability is provided on the back surface for the purpose of improving the adhesiveness with the laminating adhesive used for sticking to the adherend substrate. It can also be left.
[0033]
【Example】
Hereinafter, specific examples of the decorative sheet of the present invention will be given to describe the present invention in more detail.
[0034]
[Example 1]
A colored polypropylene resin to which an inorganic pigment and an organic pigment were added was extruded to a thickness of 120 μm with an extruder to form a substrate sheet, and a corona treatment was applied to both sides thereof to adjust the wetting index to 38 dyn / cm or more.
[0035]
Next, a pigment composition in which a small amount of carbon black, cobalt blue, and phthalocyanine blue are mixed mainly in the base sheet with a concealing inorganic pigment (iron oxide-based tea, iron oxide-based ocher and titanium oxide-based white). The concealed solid layer is printed by gravure printing with the urethane resin ink it contains, then the wood pattern is printed by gravure printing with the usual urethane gravure printing ink for building materials, and the thermoplastic urethane system The anchor agent was applied to a coating amount of 6 μm after drying.
[0036]
Next, a soft polyolefin mainly composed of low crystalline polypropylene having an isotactic index (boiling decane soluble residue) of 10% with addition of 0.2% by weight of a light stabilizer and 0.3% by weight of an ultraviolet absorber. Mainly composed of a highly crystalline polypropylene having a base resin layer of 80 μm, an isotactic index (boiling decane soluble residue) added with 0.2% by weight of a light stabilizer and 0.3% by weight of an ultraviolet absorber. A transparent resin layer consisting of two layers with a high crystalline polypropylene resin layer of 10 μm is formed into a sheet by a coextrusion method, and the ozone treatment is applied to the soft polyolefin resin layer surface, and the high crystalline polypropylene resin layer surface is applied to the surface. Corona treatment is applied to adjust the surface wetting index to 38 dyn / cm or more, and the soft polyolefin resin surface is applied to the anchor agent coated surface of the base sheet. Force 25kgf / cm2The film was coextruded and laminated at a line speed of 20 m / min.
[0037]
Next, on the transparent resin layer, an acrylate ultraviolet curable resin added with 0.2% by weight of a light stabilizer and 0.3% by weight of an ultraviolet absorber was coated to a thickness of 20 μm. Next, the embossing of the conduit | pipe handle was given with the metal embossing roll of 180 degreeC. After that, the back surface of the base sheet is subjected to corona treatment to adjust the wetting index to 38 dyn / cm or more, and the urethane resin primer mixed with silica powder is coated by the gravure coating method, and the coating amount is 1 g / m.2To form a primer layer to complete the decorative sheet of the present invention.
[0038]
The obtained decorative sheet is coated with 10 g / m of an aqueous two-component urethane adhesive on a polyester resin-based three-dimensional substrate having a radius of curvature of 0.5.2(Dry) After spray coating and drying, three-dimensional lamination was performed at a sheet temperature of 80 ° C. The obtained decorative board had scratch resistance of 2H in terms of pencil hardness, and was not damaged even with 1000 g of Hoffman scratch. A decorative plate with good scratch resistance and no surface whitening or cracking was obtained.
[0039]
[Example 2]
A colored polypropylene resin to which an inorganic pigment and an organic pigment were added was extruded to a thickness of 120 μm with an extruder to form a substrate sheet, and a corona treatment was applied to both sides thereof to adjust the wetting index to 38 dyn / cm or more.
[0040]
Next, a pigment composition in which a small amount of carbon black, cobalt blue, and phthalocyanine blue are mixed mainly in the base sheet with a concealing inorganic pigment (iron oxide-based tea, iron oxide-based ocher and titanium oxide-based white). The concealed solid layer is printed by gravure printing with the urethane resin ink it contains, then the wood pattern is printed by gravure printing with the usual urethane gravure printing ink for building materials, and the thermoplastic urethane system The anchor agent was applied to a coating amount of 6 μm after drying.
[0041]
Next, 30 parts by weight of EPDM (ethylene-propylene-diene monomer elastomer), 60 parts by weight of a polypropylene resin having an isotactic index of 90%, and 10 parts by weight of a polyethylene resin having an isotactic index of 90% were added with a light stabilizer of 0.2. 80 μm of a flexible polyolefin resin layer to which wt% and 0.3 wt% of an ultraviolet absorber are added, and an isotactic index containing 0.2 wt% of a light stabilizer and 0.3 wt% of an ultraviolet absorber (boiling decane is acceptable. A transparent resin layer consisting of two layers of a highly crystalline polypropylene resin layer mainly composed of 94% highly crystalline polypropylene (melting residue) is formed into a sheet by a coextrusion method, and the flexible polyolefin Surface treated with ozone on the surface of the resin layer and corona treatment on the surface of the highly crystalline polypropylene resin layer The wetting index is adjusted to 38 dyn / cm or more, the surface of the flexible polyolefin resin layer is applied to the anchor agent-coated surface of the base sheet, and the pressure is 25 kgf / cm.2The film was coextruded and laminated at a line speed of 20 m / min.
[0042]
Next, on the transparent resin layer, an acrylate ultraviolet curable resin added with 0.2% by weight of a light stabilizer and 0.3% by weight of an ultraviolet absorber was coated to a thickness of 20 μm. Next, the embossing of the pipe pattern was given with the metal embossing roll of 180 degreeC, and the decorative sheet was obtained. After that, the back surface of the base sheet is subjected to corona treatment to adjust the wetting index to 38 dyn / cm or more, and the urethane resin primer mixed with silica powder is coated by the gravure coating method, and the coating amount is 1 g / m.2To form a primer layer to complete the decorative sheet of the present invention.
[0043]
The obtained decorative sheet is coated with 10 g / m of an aqueous two-component urethane adhesive on a polyester resin-based three-dimensional substrate having a radius of curvature of 0.5.2(Dry) After spray coating and drying, three-dimensional lamination was performed at a sheet temperature of 80 ° C. The obtained decorative board had scratch resistance of 2H in terms of pencil hardness, and was not damaged even with 1000 g of Hoffman scratch. A decorative plate with good scratch resistance and no surface whitening or cracking was obtained.
[0044]
  [Reference Example 1]
20 μm base sheet mainly composed of highly crystalline polypropylene resin with an isotactic index (boiling decane soluble residue) of 94% added with 0.2% by weight of light stabilizer and 0.3% by weight of UV absorber And a soft polyolefin based on a low crystalline polypropylene having an isotactic index (boiling decane soluble residue) of 10% with addition of 0.2% by weight of a light stabilizer and 0.3% by weight of an ultraviolet absorber. The main component is a highly crystalline polypropylene having a resin layer of 120 μm and an isotactic index (boiling decane soluble residue) added with 0.2% by weight of a light stabilizer and 0.3% by weight of an ultraviolet absorber. A highly crystalline polypropylene resin layer of 20 μm was co-extruded to form a three-layer film to obtain a transparent resin layer having a thickness of 160 μm. After film formation, corona treatment was applied to both surfaces to activate the surface wetting index to 38 dyn / cm or more.
[0045]
Next, the transparent resin layer was coated with an acrylate-based ultraviolet curable resin to which a light stabilizer 0.2 wt% and an ultraviolet absorber 0.3 wt% were added to a thickness of 20 μm. Next, the embossing of the conduit | pipe handle was given with the metal embossing roll of 180 degreeC. After that, corona treatment is applied to the back surface of the base sheet to adjust the wetting index to 38 dyn / cm or more, and the wood pattern is printed by the gravure printing method with the usual urethane-based gravure printing ink for building materials. Gravure printing with urethane resin ink containing pigment composition composed mainly of inorganic inorganic pigments (iron oxide-based tea, iron oxide-based ocher and titanium oxide-based white) mixed with a small amount of carbon black, cobalt blue and phthalocyanine blue The concealed solid layer was printed by the method to complete the decorative sheet of the present invention.
[0046]
The obtained decorative sheet is coated with 10 g / m of an aqueous two-component urethane adhesive on a polyester resin-based three-dimensional substrate having a radius of curvature of 0.5.2(Dry) After spray coating and drying, three-dimensional lamination was performed at a sheet temperature of 80 ° C. The obtained decorative board had scratch resistance of 2H in terms of pencil hardness, and was not damaged even with 1000 g of Hoffman scratch. A decorative plate with good scratch resistance and no surface whitening or cracking was obtained.
[0047]
  Example 3]
10 μm of a base sheet made of a highly crystalline polypropylene resin having an isotactic index (boiling decane soluble residue) of 94% as a main component and colored by adding an inorganic pigment and an organic pigment; An inorganic pigment and an organic pigment are added to 30 parts by weight of EPDM (ethylene-propylene-diene monomer elastomer), 60 parts by weight of a polypropylene resin having an isotactic index of 90% and 10 parts by weight of a polyethylene resin having an isotactic index of 90%. Highly crystalline polypropylene colored with the addition of inorganic pigments and organic pigments, mainly composed of colored soft polyolefin resin layer 80μm and high crystalline polypropylene with isotactic index (boiling decane soluble residue) of 94% 3 layer co-extrusion with 10 μm resin layer And film to obtain a colored resin layer having a thickness of 100 [mu] m. After film formation, both surfaces were subjected to corona treatment to activate the surface to 38 dyn / cm or more.
[0048]
Next, on the surface of the colored resin layer (high crystalline polypropylene-based resin layer surface), a small amount of carbon black and cobalt mainly containing a concealing inorganic pigment (iron oxide-based tea, iron oxide-based ocher and titanium oxide-based white). A concealed solid layer is printed by a gravure printing method using a urethane resin-based ink containing a pigment composition in which blue and phthalocyanine blue are mixed, and then the grain is printed by a gravure printing method using a normal urethane-based gravure printing ink for building materials. Then, a thermoplastic urethane anchor agent was applied to a thickness of 6 μm after drying.
[0049]
Next, 30 parts by weight of EPDM (ethylene-propylene-diene monomer elastomer), 60 parts by weight of a polypropylene resin having an isotactic index of 90%, and 10 parts by weight of a polyethylene resin having an isotactic index of 90% were added with a light stabilizer of 0.2. 80 μm of a flexible polyolefin resin layer to which wt% and 0.3 wt% of an ultraviolet absorber are added, and an isotactic index containing 0.2 wt% of a light stabilizer and 0.3 wt% of an ultraviolet absorber (boiling decane is acceptable. A transparent resin layer consisting of two layers of a highly crystalline polypropylene resin layer mainly composed of 94% highly crystalline polypropylene (melting residue) is formed into a sheet by a coextrusion method, and the flexible polyolefin Surface treated with ozone on the surface of the resin layer and corona treatment on the surface of the highly crystalline polypropylene resin layer The wet polyolefin index is adjusted to 38 dyn / cm or more, and the surface of the flexible polyolefin resin layer is applied to the anchor agent-coated surface of the colored resin layer with a pressure of 25 kgf / cm.2The film was coextruded and laminated at a line speed of 20 m / min.
[0050]
Next, the surface of the transparent resin layer was coated with an acrylate-based ultraviolet curable resin added with 0.2% by weight of a light stabilizer and 0.3% by weight of an ultraviolet absorber to a thickness of 20 μm. Next, the embossing of the conduit | pipe handle was given with the metal embossing roll of 180 degreeC. After that, the back surface of the base sheet is subjected to corona treatment to adjust the wetting index to 38 dyn / cm or more, and the urethane resin primer mixed with silica powder is coated by the gravure coating method, and the coating amount is 1 g / m.2To form a primer layer to complete the decorative sheet of the present invention.
[0051]
The obtained decorative sheet is coated with 10 g / m of an aqueous two-component urethane adhesive on a polyester resin-based three-dimensional substrate having a radius of curvature of 0.5.2(Dry) After spray coating and drying, three-dimensional lamination was performed at a sheet temperature of 80 ° C. The obtained decorative board had scratch resistance of 2H in terms of pencil hardness, and was not damaged even with 1000 g of Hoffman scratch. A decorative plate with good scratch resistance and no surface whitening or cracking was obtained.
[0052]
[Reference Example 2]
Soft polyolefin resin layer mainly composed of low crystalline polypropylene with 10% isotactic index (boiling decane soluble residue) to which 0.2% by weight of light stabilizer and 0.3% by weight of UV absorber are added. Mainly composed of highly crystalline polypropylene with an isotactic index (boiling decane soluble residue) of 94%, with 0.2% by weight of light stabilizer and 0.3% by weight of UV absorber added on both sides of 80 μm Three layers were coextruded to form a polyolefin resin layer having a thickness of 10 μm to obtain a transparent resin layer having a thickness of 100 μm. After film formation, corona treatment was applied to both surfaces to activate the surface wetting index to 38 dyn / cm or more.
[0053]
Next, a colored polypropylene resin to which an inorganic pigment and an organic pigment were added was extruded to a thickness of 120 μm with an extruder to form a base sheet, and corona treatment was applied to both sides thereof to adjust the wetting index to 38 dyn / cm or more. .
[0054]
Next, a pigment composition in which a small amount of carbon black, cobalt blue, and phthalocyanine blue are mixed mainly in the base sheet with a concealing inorganic pigment (iron oxide-based tea, iron oxide-based ocher and titanium oxide-based white). The concealed solid layer is printed by the gravure printing method with the urethane resin-based ink contained, then the wood pattern is printed by the gravure printing method with the usual urethane-based gravure printing ink for building materials, and further the thermoplastic urethane-based After coating the anchor agent to a coating amount of 6 μm after drying, the transparent resin layer is applied to the coated surface through a two-component urethane-based dry laminate adhesive at a temperature of 120 ° C. and a pressure of 25 kgf / cm.2Then, dry lamination was performed at a line speed of 20 m / min.
[0055]
Next, the transparent resin layer was coated with an acrylate-based ultraviolet curable resin to which a light stabilizer 0.2 wt% and an ultraviolet absorber 0.3 wt% were added to a thickness of 20 μm. Next, the embossing of the conduit | pipe handle was given with the metal embossing roll of 180 degreeC. After that, the back surface of the base sheet is subjected to corona treatment to adjust the wetting index to 38 dyn / cm or more, and the urethane resin primer mixed with silica powder is coated by the gravure coating method, and the coating amount is 1 g / m.2To form a primer layer to complete the decorative sheet of the present invention.
[0056]
The obtained decorative sheet is coated with 10 g / m of an aqueous two-component urethane adhesive on a polyester resin-based three-dimensional substrate having a radius of curvature of 0.5.2(Dry) After spray coating and drying, three-dimensional lamination was performed at a sheet temperature of 80 ° C. The obtained decorative board had scratch resistance of 2H in terms of pencil hardness, and was not damaged even with 1000 g of Hoffman scratch. A decorative plate with good scratch resistance and no surface whitening or cracking was obtained.
[0057]
[Reference example 3]
30 parts by weight of EPDM (ethylene-propylene-diene monomer elastomer), 60 parts by weight of polypropylene resin with 90% isotactic index and 10 parts by weight of polyethylene resin with 90% isotactic index, 0.2% by weight of light stabilizer and Isotactic index (boiling decane soluble) with 0.2% by weight of light stabilizer and 0.3% by weight of UV absorber on both sides of 80μm soft polyolefin resin layer with 0.3% by weight of UV absorber Three layers were coextruded to form a transparent resin layer having a thickness of 100 μm so that the high crystalline polypropylene resin layer mainly composed of 94% highly crystalline polypropylene (residue) was 10 μm in thickness. . After film formation, corona treatment was performed to activate the surface to 38 dyn / cm or more.
[0058]
Next, on the back surface of the transparent resin layer, a pattern of wood grain is printed by a normal gravure printing ink for building materials by a gravure printing method, and then a concealing inorganic pigment (iron oxide tea, iron oxide system). A concealed solid layer is printed and formed by a gravure printing method using urethane resin ink containing a pigment composition in which a small amount of carbon black, cobalt blue and phthalocyanine blue are mixed mainly with ocher and titanium oxide white). The plastic urethane anchor was applied to a thickness of 6 μm after drying.
[0059]
Next, a colored polypropylene resin to which an inorganic pigment and an organic facial pigment are added is extruded with an extruder to a thickness of 120 μm while forming a film with ozone treatment on one side and corona treatment on the other side to give a wetting index of 38 dyn / cm or more. And the ozone-treated surface is applied to the anchor agent-coated surface of the transparent resin layer at a pressure of 25 kgf / cm.2Then, extrusion lamination was performed under a line speed of 20 m / min. Next, the surface of the transparent resin layer was coated with an acrylate-based ultraviolet curable resin added with 0.2% by weight of a light stabilizer and 0.3% by weight of an ultraviolet absorber to a thickness of 20 μm. Next, the embossing of the conduit | pipe handle was given with the metal embossing roll of 180 degreeC. After that, the back surface of the base sheet is subjected to corona treatment to adjust the wetting index to 38 dyn / cm or more, and the urethane resin primer mixed with silica powder is coated by the gravure coating method, and the coating amount is 1 g / m.2To form a primer layer to complete the decorative sheet of the present invention.
[0060]
The obtained decorative sheet is coated with 10 g / m of an aqueous two-component urethane adhesive on a polyester resin-based three-dimensional substrate having a radius of curvature of 0.5.2(Dry) After spray coating and drying, three-dimensional lamination was performed at a sheet temperature of 80 ° C. The obtained decorative board had scratch resistance of 2H in terms of pencil hardness, and was not damaged even with 1000 g of Hoffman scratch. A decorative plate with good scratch resistance and no surface whitening or cracking was obtained.
[0061]
【The invention's effect】
As described above in detail, the decorative sheet of the present invention is not only laminated to a planar substrate, but also subjected to three-dimensional solid molding such as lapping lamination or vacuum molding to a solid substrate, It is possible to obtain a cosmetic material that is free from cracks, whitening, wrinkles and the like and that has excellent surface scratch resistance.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing a laminated structure of an example of a decorative sheet of the present invention.
FIG. 2 is a schematic cross-sectional view showing a laminated structure of an example of a decorative sheet of the present invention.
FIG. 3 is a schematic cross-sectional view showing a laminated structure of an example of a decorative sheet of the present invention.
FIG. 4 is a schematic cross-sectional view showing a laminated structure of an example of a decorative sheet of the present invention.
FIG. 5 is a schematic cross-sectional view showing a laminated structure of an example of a decorative sheet of the present invention.
FIG. 6 is a schematic cross-sectional view showing a laminated structure of an example of the decorative sheet of the present invention.
[Explanation of symbols]
1 ... Base sheet
2 ... Soft polyolefin resin layer
3. Highly crystalline polypropylene resin layer
4 ... Pattern layer
5. Surface resin layer
51 ... Base surface resin layer
52 ... Upper surface resin layer
6. Second high crystalline polypropylene resin layer

Claims (1)

印刷層を設けた熱可塑性樹脂からなる基材シートの、前記印刷層上にアイソタクティックインデックス(沸騰デカン可溶残分)が40%以下である低結晶性ポリオレフィン系樹脂を主成分とする樹脂組成物、または、軟質ゴム成分を添加したポリオレフィン系樹脂を主成分とする樹脂組成物からなる厚みが、20〜150μmの範囲の軟質ポリオレフィン系樹脂層と、アイソタクティックインデックス(沸騰デカン可溶残分)が90%以上である厚みが、5〜20μmの範囲の高結晶性ポリプロピレン樹脂を主成分とする樹脂組成物からなる高結晶性ポリプロピレン系樹脂層からなり、前記軟質ポリオレフィン系樹脂層が高結晶性ポリプロピレン系樹脂層より厚い構成とした2層の共押出しフィルムを、前記軟質ポリオレフィン系樹脂層が前記印刷層側となるように設けたことを特徴とする化粧シート。Resin mainly composed of a low crystalline polyolefin-based resin having an isotactic index (boiling decane soluble residue) of 40% or less on the printed layer of a base sheet made of a thermoplastic resin provided with a printed layer A soft polyolefin resin layer having a thickness of 20 to 150 μm and an isotactic index (boiling decane soluble residue), or a resin composition mainly composed of a polyolefin resin to which a soft rubber component is added; thickness min) is 90% or more, consists of a made of a resin composition mainly composed of a high crystalline polypropylene resin in the range of 5~20μm highly crystalline polypropylene-based resin layer, wherein the flexible polyolefin resin layer A two-layer co-extruded film with a thicker structure than the highly crystalline polypropylene resin layer has the soft polyolefin resin layer in front. A decorative sheet provided on the printing layer side.
JP28308298A 1998-10-05 1998-10-05 Decorative sheet Expired - Fee Related JP4154767B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28308298A JP4154767B2 (en) 1998-10-05 1998-10-05 Decorative sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28308298A JP4154767B2 (en) 1998-10-05 1998-10-05 Decorative sheet

Publications (2)

Publication Number Publication Date
JP2000108265A JP2000108265A (en) 2000-04-18
JP4154767B2 true JP4154767B2 (en) 2008-09-24

Family

ID=17660991

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28308298A Expired - Fee Related JP4154767B2 (en) 1998-10-05 1998-10-05 Decorative sheet

Country Status (1)

Country Link
JP (1) JP4154767B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040076804A1 (en) * 2000-11-10 2004-04-22 Masato Kijima Surface-protecting film/sheet and decorative film/sheet, and decorative material
JP4803441B2 (en) * 2006-09-19 2011-10-26 凸版印刷株式会社 Decorative sheet
JP5272792B2 (en) * 2009-02-23 2013-08-28 凸版印刷株式会社 High weather resistant decorative sheet
JP5533982B2 (en) * 2012-11-12 2014-06-25 大日本印刷株式会社 Decorative sheet and method for producing the same

Also Published As

Publication number Publication date
JP2000108265A (en) 2000-04-18

Similar Documents

Publication Publication Date Title
CN106660300B (en) Embossed and hot melt laminated multilayer composite film
JP4842491B2 (en) Ionomer multi-layer coextrusion cosmetic finish
JP6487127B1 (en) Decorative plate, method for using the same and method for producing the same, and laminate and floor finish including the same
US6364992B1 (en) Decorative sheet and process for producing the same
JP2009078394A (en) Decorative material
JP4318789B2 (en) Decorative sheet
JP4070885B2 (en) Cosmetic sheet and method for producing the same
JP4617555B2 (en) Cosmetic sheet and cosmetic material
JP3998957B2 (en) Injection molding simultaneous decoration sheet and decorative molded product
JP3633367B2 (en) Decorative sheet
JP4154767B2 (en) Decorative sheet
KR20190087202A (en) Biaxially stretched polypropylene deco sheet film and method for manufacturing veneer using the same
JP4816833B2 (en) Decorative sheet and base material with decorative sheet
JP3641946B2 (en) Decorative sheet
KR101996363B1 (en) The biaxially oriented polypropylene deco sheet film containing a protective film and a method for preparing wood pattern using the same
JP2000343649A (en) Decorative sheet
JP4962612B2 (en) Decorative sheet manufacturing method, decorative molded product, and injection molding simultaneous decoration method
JP4857455B2 (en) Cosmetic material with excellent weather resistance
JP4121637B2 (en) Topcoat layer composition and decorative sheet
JP7268309B2 (en) Decorative sheet and decorative member
JP4601783B2 (en) Decorative sheet and method for producing the same
JP2009274454A (en) Decoration sheet
JP2000301682A (en) Decorative sheet
JP4514849B2 (en) Manufacturing method of decorative sheet
JP2000198168A (en) Decorative sheet

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050916

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20080121

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080129

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080311

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080408

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080523

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080617

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080630

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110718

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110718

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120718

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120718

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130718

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140718

Year of fee payment: 6

LAPS Cancellation because of no payment of annual fees