JP5568932B2 - 床材用化粧シート及び床用化粧材 - Google Patents
床材用化粧シート及び床用化粧材 Download PDFInfo
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Description
項1.基材シートのおもて面に1又は2以上の層が積層されている化粧シート中間体と、前記基材シートの裏面に合成樹脂製バッカー層とを有する床材用化粧シートであって、
前記合成樹脂層製バッカー層は、硬質層と軟質層からなる2層以上で構成され、少なくとも基材シートに接する層は硬質層であり、
前記合成樹脂製バッカー層の硬質層はJIS K6734の規定に従って測定した引張り弾性率が800MPa以上であり、軟質層はJIS K6734の規定に従って測定した引張り弾性率が500MPa以下である、
ことを特徴とする床材用化粧シート。
項2.前記合成樹脂製バッカー層が発泡体層を含む、項1に記載の床材用化粧シート。
項3.前記硬質層及び前記軟質層が、樹脂成分としてポリプロピレンを含有する、項1又は2に記載の床材用化粧シート。
項4.前記化粧シート中間体は、前記基材シート上に、絵柄模様層、透明性接着剤層、透明性樹脂層及び透明性表面保護層を順に有する、項1〜3のいずれか一項に記載の床材用化粧シート。
項5.項1〜4のいずれか一項に記載の床材用化粧シートの裏面と被着材とを貼着してなる床用化粧材。
本発明の床材用化粧シートは、基材シートのおもて面に1又は2以上の層が積層されている化粧シート中間体と、前記基材シートの裏面に合成樹脂製バッカー層とを有する床材用化粧シートであって、前記合成樹脂層製バッカー層は、硬質層と軟質層からなる2層以上で構成され、少なくとも基材シートに接する層は硬質層であることを特徴とする。
本発明の床材用化粧シートは、基材シートの裏面に合成樹脂製バッカー層を有する。合成樹脂製バッカー層は、硬質層と軟質層の2層以上からなる。
硬質層は、その引張り弾性率が好ましくは800 MPa以上であり、より好ましくは1000 MPa以上である。引張り弾性率の上限は特に限定的ではないが、2500 MPaとすればよい。
軟質層は、発泡させても良い。
化粧シート中間体は、基材シートのおもて面に1又は2以上の層が積層されている。
基材シートは、その表面(おもて面)には絵柄模様層等が順次積層される。
絵柄層は、化粧シートに所望の絵柄(意匠)を付与するものであり、絵柄の種類等は限定的ではない。例えば、木目模様、石目模様、砂目模様、タイル貼模様、煉瓦積模様、布目模様、皮絞模様、幾何学図形、文字、記号、抽象模様等が挙げられる。
接着剤層は、絵柄層と透明性樹脂層との間に存在する。接着剤層で使用する接着剤は、絵柄層又は透明性樹脂層を構成する成分等に応じて適宜選択することができる。例えば、ポリウレタン系樹脂、ポリアクリル系樹脂、ポリカーボネート系樹脂、エポキシ系樹脂等を含む各種接着剤を使用できる。また、反応硬化タイプのほか、ホットメルトタイプ、電離放射線硬化タイプ、紫外線硬化タイプ等の接着剤でもよい。
透明性樹脂層は透明である限り着色されていてもよく、絵柄層が視認できる範囲内で半透明であってもよい。
透明性樹脂層の上には、透明性表面保護層が形成されている。透明性表面保護層は限定的ではないが、樹脂成分として電離放射線硬化型樹脂又は2液硬化型ウレタン系樹脂を含有することが好ましい。実質的には、これらの樹脂から形成されているものが好ましい。電離放射線硬化型樹脂又は2液硬化型ウレタン系樹脂により透明性表面保護層を形成する場合には、化粧シートの耐摩性、耐衝撃性、耐汚染性、耐擦傷性、耐候性等を高め易い。
化粧シート中間体は、透明性表面保護層側からエンボス加工が施されていてもよい。
本発明の床材用化粧シートは、各種被着材と接合することにより、床用化粧材とできる。被着材の材質は特に限定されず、例えば、無機非金属系、金属系、木質系、プラスチック系等の材質が挙げられる。
(床材の作製)
0.06mm厚の着色ポリプロピレン(基材シート)に絵柄模様層(2μm)を印刷により形成した。次いで絵柄模様層の上に0.08mm厚の透明性ポリプロピレン系樹脂フィルムを、ウレタン系ドライラミネート用接着剤を用いて接着した。次いで透明性樹脂層の上に電子線硬化型透明性表面保護層(15μm)を形成した。次いで透明性表面保護層側からエンボス加工を施して化粧シート中間体を作製した。エンボス加工は、深さ30μm程度の木目導管模様とした。
作製した床用化粧材の耐衝撃性をデュポン衝撃試験機(JIS K5600−5−3に準拠)を用いて評価した。具体的には、30cmの高さから規定重量の錘を化粧材表面に落下させて凹み量を測定することにより評価した。
歩行安定性は、作製した床用化粧材を人が実際に歩行したときの感覚により評価した(評価人数:20人)。
(安全性試験)
安全性は、作製した床用化粧材に重量物が落下したときの衝撃緩和により評価した。試料を鉄板上に置き、530gの鋼球を75cmの高さから落下させたときの衝撃(圧力)をプレスケールにて測定した。
*一般的なクッションフロアと同等以上:○ 一般的なカラーフロアと同等:△ カラーフロアより硬い:×
表1〜3からは、合成樹脂製バッカー層が硬質層と軟質層を有し、基材シートに接する層が硬質層である場合は、一般的なカラーフロアと耐傷性が同等以上であり、歩行安定性と安全性においても同等以上であることが分かる。
2.透明性樹脂層
3.絵柄模様層及び透明性接着剤層
4.基材シート
5.合成樹脂製バッカー層(硬質層)
6.合成樹脂製バッカー層(軟質層)
Claims (5)
- 基材シートのおもて面に1又は2以上の層が積層されている化粧シート中間体と、前記基材シートの裏面に合成樹脂製バッカー層とを有する床材用化粧シートであって、
前記合成樹脂層製バッカー層は、硬質層と軟質層からなる2層以上で構成され、少なくとも基材シートに接する層は硬質層であり、
前記合成樹脂製バッカー層の硬質層はJIS K6734の規定に従って測定した引張り弾性率が800MPa以上であり、軟質層はJIS K6734の規定に従って測定した引張り弾性率が500MPa以下である、
ことを特徴とする床材用化粧シート。 - 前記合成樹脂製バッカー層が発泡体層を含む、請求項1に記載の床材用化粧シート。
- 前記硬質層及び前記軟質層が、樹脂成分としてポリプロピレンを含有する、請求項1又は2に記載の床材用化粧シート。
- 前記化粧シート中間体は、前記基材シート上に、絵柄模様層、透明性接着剤層、透明性樹脂層及び透明性表面保護層を順に有する、請求項1〜3のいずれか一項に記載の床材用化粧シート。
- 請求項1〜4のいずれか一項に記載の床材用化粧シートの裏面と被着材とを貼着してなる床用化粧材。
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