JP4200807B2 - Cosmetic material - Google Patents

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JP4200807B2
JP4200807B2 JP2003117977A JP2003117977A JP4200807B2 JP 4200807 B2 JP4200807 B2 JP 4200807B2 JP 2003117977 A JP2003117977 A JP 2003117977A JP 2003117977 A JP2003117977 A JP 2003117977A JP 4200807 B2 JP4200807 B2 JP 4200807B2
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protective layer
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JP2004322396A (en
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誠治 佐野
勝之 新名
浩一 佐川
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Toppan Inc
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Toppan Inc
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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材に関するものである。更に詳しくは、表面に落ち着いた艶消し感を有し、しかも耐磨耗性や耐擦傷性、耐汚染性に優れ、艶消し感の長期持続性も良く、さらには、保護層を厚く設ける場合でも艶消剤の節約が可能で、得られる艶消し感の均一性や安定性にも優れた化粧材に関するものである。
【0002】
【従来の技術】
上記各種用途に用いられる化粧材(化粧板、化粧紙、化粧シート等を含む)には、その長期に亘る使用中の、人体や各種物品との接触による磨耗や擦傷に耐え、その表面の美観を長期に亘り維持するために、熱硬化性樹脂又は電離放射線硬化性樹脂等の、硬質で透明な樹脂組成物を主成分とする保護層が、表面に設けられている場合が多い。この保護層は、用途によっては、鏡面状等の艶出し仕上げとされる場合もあるが、一般的な用途には、高級感のある艶消し仕上げが所望される場合が多く、そのため、無機粉末などの艶消剤の添加により、表面に微細な凹凸を形成した艶消し状とされる場合が多い。
【0003】
しかし、艶消剤の添加により保護層の表面を良好な艶消し状とするためには、艶消剤として、その外形に不規則な角部や稜部を有する不定形状の粒子を使用し、この粒子の一部を保護層の平均表面から突出させる事で微細な凹凸を形成する必要がある。従って、物品等との接触時に、この突出部に物品等が衝突することにより、粒子が保護層から脱落したり、脱落した粒子が保護層の表面を擦ることによって、傷を付けたり、あるいは、物品等との接触の圧力によって、粒子が保護層の内部へめり込んだりした、保護層の表面形状が変化し、擦り傷による艶変化として、化粧材に美観を低下させてしまうという問題がある。
【0004】
また、上記の様に、保護層の表面に微細な凹凸が形成されているために、化粧材を使用中に表面に付着した汚染物が凹部等に入り込むと、雑巾等で拭き取ろうとしても拭き取り難く、従って、使用中の経時により表面の汚染が蓄積して、化粧材の美観を低下させてしまうという問題もある。
【0005】
上記の問題は、艶消剤として、その外形に不規則な角部や稜部のない球状の粒子を使用すれば、その粒子形状に起因して、粒子の保護層からの脱落も保護層内へのめり込みも発生し難く、また、表面が全体としてなだらかな形状となることから、凹部への汚染物の詰まりも発生しにくいので、大幅に軽減することができる。
【0006】
しかし、上記した球状の粒子としては一般的に、架橋アクリルビーズ又は架橋ウレタンビーズ等の架橋樹脂粒子やガラスビーズ等の無機粒子が用いられるが、これらは一般に保護層の塗工液よりも比重が大きいために、保護層を塗工形成する際に、保護層の底部へ沈降してしまい易く、保護層の表面への凹凸の形成に有効に寄与する粒子はごく一部に過ぎない。特に、保護層を粒子の粒径と比較して厚く形成する場合には、粒子を大量に添加する必要があるために材料の無駄が多いほか、保護層の塗膜強度を低下させたり、保護層の透明度が低下して意匠性が悪化する場合があることなどの問題がある。
【0007】
また、係る粒子の粒径は、工業製品として全てを均一にすることは困難であり、統計的には正規分布を描く種々の粒径の粒子の集合体であり、いわゆる平均粒径よりも粒径の大きい粒子や小さい粒子が混在しているのが現実である。そのため、保護層の厚みよりも小さい粒径の粒子は保護層の底部へ沈降して表面に現れず、また、一定以上の粒径のものは、その粒径に比例して表面の凹凸の高低差を生じさせるため、保護層の膜厚のばらつきにより、表面に現れる凹凸の程度が異なり、ついては得られる艶消し感、質感などを均一にするのが困難であり、工業製品としての品質管理の観点からは満足できるものではなかった。
【0008】
【特許文献1】
特開平8−57410号公報
【特許文献2】
特開平8−183147号公報
【特許文献3】
特開平11−129427号公報
【特許文献4】
特開2001−129929号公報
【0009】
【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上記のような問題点を解決するためになされたものであり、その目的とするところは、一般的な化粧材に所望される高級感ある落ち着いた艶消し感を有し、しかも該艶消し感が化粧材の使用中の磨耗や擦傷により損なわれにくく、また、表面の微細な凹部への汚染物の蓄積も発生しにくく、耐汚染性も良好であり、艶消し感の長期持続性も良く、さらには、保護層を厚く設ける場合でも艶消剤の節約が可能で、得られる艶消し感の均一性や安定性にも優れた化粧材を提供することにある。
【0010】
本発明の化粧材は、基材と、前記基材の表面に設けられた保護層と、を備え、前記保護層は、透明又は半透明の樹脂組成物を主成分とし、該主成分である樹脂組成物よりも高硬度の材質からなる透明又は半透明の中空球状粒子を含有する保護層であり、前記中空球状粒子の真比重は0.2〜0.5であることを特徴とするものである。
【0012】
【発明の実施の形態】
以下、本発明の化粧材の実施の形態を、図面を参照しつつ説明する。図1は本発明の化粧材の実施の形態を示す断面図である。
【0013】
本発明において、基材1の材質や構成は特に限定されるものではなく、一般的な化粧材用の基材であれば何でも適用可能である。具体的には、例えば薄葉紙、チタン紙、上質紙、表面処理紙、樹脂含浸紙、樹脂混抄紙、紙間強化紙等の紙類や、織布又は不織布等の繊維質材、ポリオレフィン系、ポリエステル系、アクリル系、ポリスチレン系、ポリアミド系、ポリビニル系等の熱可塑性樹脂フィルムや成形体、繊維強化プラスチック等の合成樹脂系基材、木材単板、合板、集成材等の木質系基材、無機質系基材、金属系基材等、あるいはこれらの複数種の複合体、積層体等、目的とする化粧材の用途に応じて任意に採用することができる。
【0014】
また、この基材1の表面、裏面及び/又は層間に、意匠性の付与のための絵柄層12の印刷やエンボス15等の装飾処理が施されていても良いことは言うまでもない。なお、図1は本発明の化粧材の一種である化粧シートを示したもので、その基材1は下から順にプライマー層16、下台シート11、絵柄層12、接着剤13、上台表面シート14からなり、該上台表面シート14の表面にはエンボス15が施されている。
【0015】
保護層2は、使用時における経時での磨耗や擦傷から基材1を保護して長期の亘りその性能を維持するために設けられるものであり、透明又は半透明の樹脂組成物を主成分とするものである。そして、本発明においては、この保護層2による保護効果をさらに高めるために、この保護層2に、その主成分である樹脂組成物よりも高硬度の材質からなる、透明又は半透明の中空球状粒子3が添加されている。
【0016】
中空球状粒子3は、従来の化粧材に使用されて来た艶消剤として一般的な粒子と異なり、中空構造となっているために比重が小さく、保護層2を塗工形成する際に保護層2の表層部に浮遊し、乾燥後にはその殆どが保護層2の表層部に集中して存在する。従って、保護層2を中空球状粒子3の平均粒径との比較において格段に厚く設ける場合であっても、保護層2の表層部に所望される量だけの中空球状粒子3を添加すれば良いので、従来の艶消剤と比較して使用量が少なくて済み、効率が良い。
【0017】
それだけでなく、保護層2に添加された中空球状粒子3は、その粒度分布のばらつきにかかわらず、大粒径の粒子も小粒径の粒子もほぼ同じ比率で表面の凹凸の形成に寄与するので、保護層2の塗布量を増すと小粒径の粒子が塗膜中に埋没して凹凸形成への寄与を失い易い従来の艶消剤を使用した場合と異なり、保護層2の塗布量が多少ばらついても得られる艶消し感の変化が少なく、意匠品質の安定した化粧材の生産が容易である。
【0018】
さらに、上記したとおり中空球状粒子3は保護層2の表層部に集中的に存在し、表層部以外の部分には殆ど存在しないので、保護層2を厚く設ける場合であっても、保護層2全体としての中空球状粒子3の含有量は少なくて済むので、中空球状粒子3の添加による保護層2の強度の低下(脆化)や透明度の低下も少なく、艶消し度の割には表面物性や意匠性に優れた化粧材が得られる利点もある。
【0019】
そのほか、添加された艶消剤としての中空球状粒子3が球状であることにより、物品等との接触時に粒子の脱落や該脱落粒子による擦傷、粒子の保護層2内へのめり込みによる艶消し感の変化や、保護層2の表面が滑らかな凹凸状であることにより凹部に汚染物が蓄積しにくく耐汚染性に優れることなどは、従来の中空でない球状粒子を用いた化粧材の場合と同様である。
【0020】
中空球状粒子3の材質としては、少なくとも保護層2の主成分である樹脂組成物よりも硬質の透明又は半透明の材質であれば良く、例えば架橋アクリル系樹脂等の硬質合成樹脂やガラス等の無機物などからなるものが使用可能で、その中でも高硬度でしかも安価に入手可能な中空ガラスビーズが最も好適である。その平均粒径としては、化粧材に所望される艶消し感の程度に応じて適宜選択が可能であるが、艶消し感及び塗工液への分散性、塗工適性等を考慮すると、概ね0.5〜30μm程度の範囲内から選ぶのが良い。
【0021】
中空球状粒子3の添加量は、あまり少なすぎると耐磨耗性や耐擦傷性の向上効果が乏しく、逆にあまり多すぎると保護層2の透明度が低下したり、表面凹凸の増加による過剰な光散乱効果が発生し、保護層2が本来有すべき艶消し感が減殺されて外観意匠性が低下したり、保護層2が全体として硬く脆くなるなどのデメリットが生じてくる。従って、中空球状粒子3の添加量は、中空球状粒子3の平均粒径と保護層2の塗布量との関係にもよるが、保護層2の主成分である樹脂組成物の固形分に対し、1〜20重量%の範囲内とすることが望ましく、中でも一般的な条件では10〜15重量%の範囲内とすることが最も望ましい。
【0022】
中空球状粒子3の真比重としては0.2〜0.5の範囲内であることが望ましい。中空球状粒子3の真比重が0.5を越えると、保護層2内での浮遊性が十分に得られず、従来の中空でない球状粒子を用いた場合と大差が見られない。一方、真比重が0.2未満であると、保護層2内での浮遊性が高すぎて表層部に集中しすぎることにより、表面硬度は高いが折り曲げ等に対して脆くなり易い。さらには、中空球状粒子3が保護層2の表面上に突出し過ぎるために、摩擦により脱落し易くなったり、中空球状粒子3の強度が低下するために、摩擦や圧力により潰れて艶消し感が変化したりする原因ともなる。また、中空球状粒子3が保護層2の表層部にあまり集中しすぎると、乾燥工程において保護層2の内部の溶剤分の蒸発を妨げ、謂わば皮張りした様な状態となって乾燥効率を低下させるという問題も生じる。
【0023】
保護層2の主成分である樹脂組成物としては、従来の化粧材における保護層と同様、例えばウレタン系樹脂、アルキド系樹脂、メラミン系樹脂、不飽和ポリエステル樹脂等の熱硬化性樹脂や、(メタ)アクリレート系樹脂等の電離放射線硬化性樹脂等から適宜選択が可能である。耐摩耗性や耐擦傷性の観点からは硬度が高い方が望ましいが、単に硬度が高ければ良いというものではなく、中空球状粒子3に外力が加えられた際に、その脱落を防ぎ塗膜中に保持できる様な、適度の柔軟性も要求される。この様な観点から、硬度と柔軟性とのバランスに優れた、アクリルポリオールとイソシアネート化合物との反応生成物、すなわちアクリルウレタン樹脂を使用することが望ましい。
【0024】
保護層2の厚さは、あまり薄過ぎると耐擦傷性等の保護効果が乏しく、逆にあまり厚すぎると割れ易くなって、耐衝撃性やVカット加工又はラッピング加工等の2次加工適性が低下する。外観意匠性も含め鑑みるに、一般的には保護層2の厚さは1〜100μm程度、特に基材1が紙又は熱可塑性樹脂フィルム等の可撓性材質である場合は1〜30μm程度とするのが良く、中でも3〜6μm程度とするのが最も望ましい。
【0025】
保護層2の形成方法としては、従来の化粧材におけると同様、例えばグラビアコート、ロールコート、ロッドコート、キスコート、ナイフコート、エアナイフコート、ダイコート、リップコート、スプレーコート、フローコート、シルク印刷、オフセット印刷、グラビア印刷等、従来公知の塗工又は印刷方法によることができる。特に、基材1が紙又は熱可塑性樹脂フィルム等の連続巻き取り状である場合には、グラビア印刷によるのが最も一般的である。
【0026】
【実施例】
以下に、本発明の実施例及び比較例を示す。
【0027】
−基材の作製−
図1に示す様に、厚さ100μmの着色ポリプロピレン樹脂フィルムを下台シート11とし、その表面にウレタン系インキによる木目柄の絵柄層12をグラビア印刷し、2液硬化型ウレタン系接着剤13を介して、上台表面シート14として厚さ80μmの透明ポリプロピレン樹脂フィルムを積層し、その表面に導管柄のエンボス15を施し、下台シート11の裏面にプライマー層16を塗工した基材1を作製した。
【0028】
−実施例−
上記基材1の表面上に、アクリルポリオール100重量部、イソシアネート硬化剤5重量部、平均粒径5μmのホウケイ酸ガラスを素材とした真比重0.3の中空球状粒子3を10重量部配合してなる塗工液をグラビアコート法にて塗工、養生硬化させて、本発明の化粧材である化粧シートを作製した。
【0029】
−比較例−
上記実施例において、上記中空球状粒子3の代わりに、同一素材からなる同一平均粒径の真比重1.5の中実球状粒子を同量配合し、その他は上記実施例と同一条件にて化粧シートを作製した。
【0030】
−性能比較−
上記で作製した各化粧シートを、中密度繊維板に貼り合わせて得た化粧板について、(1)化粧板表面をスチールウールで擦るスチールウール磨耗試験、および(2)10円銅貨を荷重1kgで擦るコインスクラッチ試験を行い、耐擦傷性の評価を目視にて行った。その結果を下表に示す。
【0031】

Figure 0004200807
【0032】
【発明の効果】
以上、詳細に説明した通り、本発明の化粧材は、表面の保護層に硬質の中空球状粒子を含有することで、粒子を保護層の表層部に集中させることができるので、保護層の膜厚のばらつきに左右されることなく、少量の粒子の添加で効率良く、しかも安定して高級感ある艶消し感を演出、付与することができ、且つ耐擦傷性、耐磨耗性に優れた化粧材を得ることができる。
【0033】
また、前記中空球状粒子の真比重が0.2〜0.5のものを用いることで、より効率良く粒子を保護層の表層部に集中させ、上記した優れた性能を確実に付与することができる。
【図面の簡単な説明】
【図1】本発明の化粧材の実施の形態を示す断面図である。
【符号の説明】
1 基材
11 下台シート
12 絵柄層
13 接着剤
14 上台表面シート
15 エンボス
16 プライマー層
2 保護層
3 中空球状粒子[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a decorative material for use in surface makeup of interior materials and construction materials for buildings such as houses, building materials such as joinery, furniture fixtures, housing equipment, and home appliances. More specifically, it has a matte feeling on the surface, is excellent in wear resistance, scratch resistance, and contamination resistance, has a long-lasting matt feeling, and has a thick protective layer. However, the present invention relates to a cosmetic material that can save matting agent and is excellent in uniformity and stability of the obtained matte feeling.
[0002]
[Prior art]
The cosmetic materials (including decorative plates, decorative paper, decorative sheets, etc.) used in the various applications mentioned above are resistant to wear and scratches caused by contact with the human body and various articles during their long-term use, and have a beautiful surface. In order to maintain this for a long period of time, a protective layer mainly composed of a hard and transparent resin composition such as a thermosetting resin or an ionizing radiation curable resin is often provided on the surface. Depending on the application, the protective layer may have a mirror finish or the like, but for general applications, a high-quality matte finish is often desired. By adding a matting agent such as, a matte shape with fine irregularities formed on the surface is often obtained.
[0003]
However, in order to make the surface of the protective layer have a good matte shape by the addition of the matting agent, as the matting agent, use irregularly shaped particles having irregular corners and ridges in the outer shape, It is necessary to form fine irregularities by projecting a part of the particles from the average surface of the protective layer. Therefore, when the article or the like collides with the projecting part at the time of contact with the article or the like, the particle falls off the protective layer, or the dropped particle rubs the surface of the protective layer, or scratches, or Due to the pressure of contact with the article or the like, the particles are sunk into the inside of the protective layer, the surface shape of the protective layer is changed, and there is a problem that the appearance of the cosmetic material is lowered as a gloss change due to scratches.
[0004]
In addition, as described above, since fine irregularities are formed on the surface of the protective layer, if contaminants adhering to the surface during use of the cosmetic material enter the recesses, etc. It is difficult to wipe off, and therefore, there is also a problem that surface contamination accumulates with the passage of time during use, thereby deteriorating the beauty of the cosmetic.
[0005]
The above problem is that if spherical particles without irregular corners or ridges are used as the matting agent, the particles may fall off the protective layer due to the particle shape. Indentation is difficult to occur, and since the surface has a gentle shape as a whole, it is difficult for clogging of contaminants into the recess, so that it can be greatly reduced.
[0006]
However, as the above-mentioned spherical particles, generally, inorganic particles such as crosslinked resin particles such as crosslinked acrylic beads or crosslinked urethane beads and glass beads are used, but these generally have a specific gravity higher than that of the coating liquid for the protective layer. Due to its large size, when coating the protective layer, it tends to settle to the bottom of the protective layer, and only a small part of the particles effectively contribute to the formation of irregularities on the surface of the protective layer. In particular, when the protective layer is formed thicker than the particle size of the particles, it is necessary to add a large amount of particles, so there is a lot of waste of material, and the protective layer's coating strength is reduced or protected. There is a problem that the transparency of the layer is lowered and the designability may be deteriorated.
[0007]
In addition, it is difficult to make all of these particles uniform as an industrial product, and it is statistically an aggregate of particles having various particle sizes that have a normal distribution. The reality is that large particles and small particles are mixed. For this reason, particles having a particle size smaller than the thickness of the protective layer settle to the bottom of the protective layer and do not appear on the surface. In order to make a difference, the degree of unevenness appearing on the surface varies depending on the variation in the thickness of the protective layer, and it is difficult to make the matte feeling and texture that are obtained uniform. It was not satisfactory from the point of view.
[0008]
[Patent Document 1]
JP-A-8-57410 [Patent Document 2]
JP-A-8-183147 [Patent Document 3]
JP-A-11-129427 [Patent Document 4]
JP 2001-129929 A
[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 to provide a high-quality and calm matte feeling desired for general cosmetics. In addition, the matte feeling is less likely to be damaged by wear and scratches during use of the cosmetic material, and the accumulation of contaminants in fine concave portions on the surface is less likely to occur, and the stain resistance is good. To provide a cosmetic material that has good long-lasting matt feeling, and can save matting agent even when a thick protective layer is provided, and has excellent uniformity and stability of the matt feeling obtained. is there.
[0010]
The decorative material of the present invention includes a base material and a protective layer provided on the surface of the base material, and the protective layer includes a transparent or translucent resin composition as a main component, and is the main component. A protective layer comprising transparent or translucent hollow spherical particles made of a material having a hardness higher than that of the resin composition, wherein the true specific gravity of the hollow spherical particles is 0.2 to 0.5 It is.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the decorative material of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of a decorative material of the present invention.
[0013]
In the present invention, the material and configuration of the base material 1 are not particularly limited, and any base material for general cosmetics can be applied. Specifically, for example, paper such as thin paper, titanium paper, fine paper, surface-treated paper, resin-impregnated paper, resin-mixed paper, inter-paper reinforced paper, fibrous materials such as woven or non-woven fabric, polyolefin-based, polyester , Acrylic, polystyrene, polyamide, polyvinyl and other thermoplastic resin films and molded products, synthetic resin base materials such as fiber reinforced plastic, wood base materials such as wood veneer, plywood and laminated wood, inorganic It can be arbitrarily employed depending on the intended use of the decorative material such as a base material, a metal base material, or a plurality of these composites and laminates.
[0014]
Needless to say, the front surface, the back surface and / or the interlayer of the base material 1 may be subjected to decoration processing such as printing of the pattern layer 12 for imparting design properties, embossing 15 or the like. FIG. 1 shows a decorative sheet which is a kind of the decorative material of the present invention. The base material 1 has a primer layer 16, a lower base sheet 11, a picture layer 12, an adhesive 13, and an upper base surface sheet 14 in order from the bottom. The surface of the upper base sheet 14 is embossed 15.
[0015]
The protective layer 2 is provided to protect the substrate 1 from wear and scratches over time during use and to maintain its performance over a long period of time. The protective layer 2 includes a transparent or translucent resin composition as a main component. To do. In the present invention, in order to further enhance the protective effect of the protective layer 2, the protective layer 2 is made of a transparent or translucent hollow sphere made of a material having a hardness higher than that of the resin composition as the main component. Particles 3 are added.
[0016]
The hollow spherical particles 3 are different from the general particles used as a matting agent used in conventional cosmetics, and have a hollow structure, so that the specific gravity is small and the protective layer 2 is protected when applied. It floats on the surface layer portion of the layer 2, and most of it is concentrated on the surface layer portion of the protective layer 2 after drying. Therefore, even when the protective layer 2 is provided to be much thicker in comparison with the average particle diameter of the hollow spherical particles 3, it is sufficient to add the desired amount of the hollow spherical particles 3 to the surface layer portion of the protective layer 2. Therefore, the amount used is small compared with the conventional matting agent, and the efficiency is good.
[0017]
In addition, the hollow spherical particles 3 added to the protective layer 2 contribute to the formation of surface irregularities at almost the same ratio for both large and small particle diameters, regardless of variations in particle size distribution. Therefore, when the coating amount of the protective layer 2 is increased, the coating amount of the protective layer 2 is different from the case of using a conventional matting agent in which particles having a small particle diameter are buried in the coating film and easily lose the contribution to the formation of irregularities. Even if there is some variation, the change in the matte feeling obtained is small and it is easy to produce a cosmetic material with a stable design quality.
[0018]
Furthermore, as described above, the hollow spherical particles 3 are concentrated in the surface layer portion of the protective layer 2 and hardly exist in the portion other than the surface layer portion. Therefore, even when the protective layer 2 is provided thick, the protective layer 2 Since the content of the hollow spherical particles 3 as a whole is small, there is little decrease in the strength (brittleness) or transparency of the protective layer 2 due to the addition of the hollow spherical particles 3, and the surface properties for the matte degree. There is also an advantage that a decorative material having excellent design properties can be obtained.
[0019]
In addition, since the hollow spherical particles 3 as the added matting agent are spherical, the matte feeling due to the dropping off of the particles upon contact with an article or the like, scratches due to the dropping particles, or the penetration of the particles into the protective layer 2 is achieved. The change and the surface of the protective layer 2 having a smooth uneven shape are less likely to accumulate contaminants in the recesses and have excellent stain resistance, as in the case of conventional cosmetic materials using non-hollow spherical particles. is there.
[0020]
The material of the hollow spherical particles 3 may be a transparent or translucent material that is harder than at least the resin composition that is the main component of the protective layer 2, such as a hard synthetic resin such as a cross-linked acrylic resin or glass. Those made of an inorganic substance can be used, and among them, hollow glass beads having high hardness and available at low cost are most preferable. The average particle size can be appropriately selected depending on the level of matting feeling desired for the cosmetic material, but considering the matting feeling and dispersibility in the coating liquid, coating suitability, etc. It is good to choose from the range of about 0.5-30 micrometers.
[0021]
If the addition amount of the hollow spherical particles 3 is too small, the effect of improving the wear resistance and scratch resistance is poor. Conversely, if the amount is too large, the transparency of the protective layer 2 is lowered or excessive due to an increase in surface irregularities. The light scattering effect occurs, and the matte feeling that the protective layer 2 originally has is reduced, and the appearance design is deteriorated, or the protective layer 2 becomes hard and brittle as a whole. Therefore, the amount of the hollow spherical particles 3 added depends on the relationship between the average particle diameter of the hollow spherical particles 3 and the coating amount of the protective layer 2 but is based on the solid content of the resin composition that is the main component of the protective layer 2. The content is preferably in the range of 1 to 20% by weight, and most preferably in the range of 10 to 15% by weight under general conditions.
[0022]
The true specific gravity of the hollow spherical particles 3 is preferably in the range of 0.2 to 0.5. When the true specific gravity of the hollow spherical particles 3 exceeds 0.5, sufficient floatability in the protective layer 2 cannot be obtained, and a large difference is not seen from the case of using conventional non-hollow spherical particles. On the other hand, when the true specific gravity is less than 0.2, the floatability in the protective layer 2 is too high and the concentration is excessively concentrated on the surface layer portion, so that the surface hardness is high, but it tends to be brittle with respect to bending. Furthermore, since the hollow spherical particles 3 protrude too much on the surface of the protective layer 2, the hollow spherical particles 3 easily fall off due to friction, or the strength of the hollow spherical particles 3 decreases. It also causes changes. Further, if the hollow spherical particles 3 are too concentrated on the surface layer portion of the protective layer 2, the evaporation of the solvent in the protective layer 2 is prevented in the drying step, so that the so-called skinned state is obtained and the drying efficiency is increased. The problem of lowering also arises.
[0023]
As the resin composition which is the main component of the protective layer 2, for example, a thermosetting resin such as a urethane resin, an alkyd resin, a melamine resin, an unsaturated polyester resin, It can be appropriately selected from ionizing radiation curable resins such as (meth) acrylate resins. Higher hardness is desirable from the viewpoints of wear resistance and scratch resistance, but it is not simply that the hardness is high, and when an external force is applied to the hollow spherical particles 3, they are prevented from falling off in the coating film. Moderate flexibility is also required. From such a viewpoint, it is desirable to use a reaction product of an acrylic polyol and an isocyanate compound, that is, an acrylic urethane resin, which has an excellent balance between hardness and flexibility.
[0024]
If the thickness of the protective layer 2 is too thin, the protective effect such as scratch resistance is poor, and conversely, if the thickness is too thick, the protective layer 2 is easily cracked and has impact resistance and suitability for secondary processing such as V-cut processing or lapping processing. descend. Considering the appearance design, generally, the thickness of the protective layer 2 is about 1 to 100 μm, and particularly about 1 to 30 μm when the substrate 1 is a flexible material such as paper or a thermoplastic resin film. In particular, the thickness is most preferably about 3 to 6 μm.
[0025]
As a method for forming the protective layer 2, for example, gravure coating, roll coating, rod coating, kiss coating, knife coating, air knife coating, die coating, lip coating, spray coating, flow coating, silk printing, offset, as in conventional cosmetic materials. It can be based on conventionally known coating or printing methods such as printing and gravure printing. In particular, when the substrate 1 has a continuous winding shape such as paper or a thermoplastic resin film, it is most common to use gravure printing.
[0026]
【Example】
Examples of the present invention and comparative examples are shown below.
[0027]
-Preparation of substrate-
As shown in FIG. 1, a colored polypropylene resin film having a thickness of 100 μm is used as a base sheet 11, and a gravure pattern layer 12 with a urethane-based ink is gravure printed on the surface, and a two-component curable urethane adhesive 13 is interposed therebetween. Then, a transparent polypropylene resin film having a thickness of 80 μm was laminated as the upper base sheet 14, a conduit handle emboss 15 was applied to the surface thereof, and the base material 1 was coated with the primer layer 16 on the back surface of the lower base sheet 11.
[0028]
-Example-
On the surface of the substrate 1, 10 parts by weight of 100 parts by weight of acrylic polyol, 5 parts by weight of isocyanate curing agent, and 10 parts by weight of hollow spherical particles 3 having a true specific gravity of 0.3 made of borosilicate glass having an average particle size of 5 μm are used. The coating liquid obtained was applied and cured and cured by a gravure coating method to produce a decorative sheet as a cosmetic material of the present invention.
[0029]
-Comparative example-
In the above embodiment, instead of the hollow spherical particles 3, the same amount of solid spherical particles having the same average particle diameter and a true specific gravity of 1.5 having the same average particle diameter are blended, and the rest is made up under the same conditions as in the above embodiment. A sheet was produced.
[0030]
-Performance comparison-
About the decorative board obtained by bonding each decorative sheet prepared above to a medium density fiberboard, (1) a steel wool abrasion test in which the decorative board surface is rubbed with steel wool, and (2) a 10 yen copper coin with a load of 1 kg A rubbing coin scratch test was performed, and the scratch resistance was visually evaluated. The results are shown in the table below.
[0031]
Figure 0004200807
[0032]
【The invention's effect】
As described above in detail, since the decorative material of the present invention contains hard hollow spherical particles in the protective layer on the surface, the particles can be concentrated on the surface layer portion of the protective layer. Regardless of thickness variation, the addition of a small amount of particles can produce and give a high-quality matte feeling efficiently and stably, and has excellent scratch resistance and abrasion resistance. A cosmetic material can be obtained.
[0033]
Further, by using the hollow spherical particles having a true specific gravity of 0.2 to 0.5, the particles can be more efficiently concentrated on the surface layer portion of the protective layer, and the above-described excellent performance can be reliably imparted. it can.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a decorative material of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base material 11 Lower base sheet 12 Picture layer 13 Adhesive 14 Upper base surface sheet 15 Emboss 16 Primer layer 2 Protective layer 3 Hollow spherical particle

Claims (1)

基材と、  A substrate;
前記基材の表面に設けられた保護層と、を備え、A protective layer provided on the surface of the substrate,
前記保護層は、透明又は半透明の樹脂組成物を主成分とし、該主成分である樹脂組成物よりも高硬度の材質からなる透明又は半透明の中空球状粒子を含有する保護層であり、The protective layer is a protective layer containing a transparent or translucent hollow spherical particle composed mainly of a transparent or translucent resin composition and made of a material having a hardness higher than that of the resin composition as the main component,
前記中空球状粒子の真比重は0.2〜0.5であることThe true specific gravity of the hollow spherical particles is 0.2 to 0.5
を特徴とする化粧材。A cosmetic material characterized by
JP2003117977A 2003-04-23 2003-04-23 Cosmetic material Expired - Fee Related JP4200807B2 (en)

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US11904574B2 (en) 2018-01-15 2024-02-20 3M Innovative Properties Company Scratch resistant film and surface coating composition

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JP7215078B2 (en) * 2018-10-26 2023-01-31 凸版印刷株式会社 Decorative sheet and decorative member
JP7214462B2 (en) * 2018-12-19 2023-01-30 トクラス株式会社 Method for manufacturing resin products

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