JP4141642B2 - Decorative metal plate - Google Patents
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- JP4141642B2 JP4141642B2 JP2000579666A JP2000579666A JP4141642B2 JP 4141642 B2 JP4141642 B2 JP 4141642B2 JP 2000579666 A JP2000579666 A JP 2000579666A JP 2000579666 A JP2000579666 A JP 2000579666A JP 4141642 B2 JP4141642 B2 JP 4141642B2
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- 229910052751 metal Inorganic materials 0.000 title claims description 38
- 239000002184 metal Substances 0.000 title claims description 38
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- 239000011347 resin Substances 0.000 claims description 113
- 238000004049 embossing Methods 0.000 claims description 44
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- 238000007747 plating Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 8
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 229910000576 Laminated steel Inorganic materials 0.000 description 7
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- 239000010960 cold rolled steel Substances 0.000 description 4
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
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- 229910052759 nickel Inorganic materials 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
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- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 2
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- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 2
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- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004830 Super Glue Substances 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 1
- MFPOUZMIWRBOON-UHFFFAOYSA-N [Mo].[Co].[Zn] Chemical compound [Mo].[Co].[Zn] MFPOUZMIWRBOON-UHFFFAOYSA-N 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
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- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 1
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- 229920000515 polycarbonate Polymers 0.000 description 1
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- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/222—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length characterised by the shape of the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Description
【技術分野】
【０００１】
本発明は、ユニットバス、給水タンク、各種工業用品、缶、等の比較的耐水性を必要とする建材や工業材料等に使用する、エンボス加工性に優れた樹脂フィルム又はシート（以下、「樹脂フィルム」という。）を被覆した化粧金属板に関する。
【背景技術】
【０００２】
化粧金属板は、ユニットバス、給水タンク、各種工業用品、缶、等の比較的耐水性を必要とする建材や工業材料等に広く用いられている。この場合、樹脂フィルムを表面に被覆することは、素材の金属板に防食効果を付与することが主目的であるが、同時に化粧金属板に高級感を持たせるという目的もあり、従来からエンボス模様を付加することが広く行われてきた。
このような目的に使用される、エンボス模様を付加するフィルムの素材は、従来から、主としてエンボス加工が容易であること、低価格であること等の観点から、たとえば軟質塩化ビニル樹脂等が多く使用されてきた。
しかし、軟質塩化ビニル樹脂は成形を容易にするためにＤＢＰ（ジブチルフタレート）、ＤＯＰ（ジオクチルフタレート）等のフタル酸類を可塑剤として添加、混合して軟質化している関係で、浴槽のような温度の高くなる箇所には使用し難く、またそれらを含む製品の廃棄には種々の問題がある。さらに、金属板にエンボス加工処理した樹脂フィルムを接着、ラミネート処理して使用する場合における製品の美感は、使用する金属板によって異なる場合が少なくない。換言すれば、その用途の製品に使用する樹脂の種類とエンボス加工処理条件によって、美感、特に高級感のような審美性的感性は左右され易いという問題があるために、エンボス加工処理は使用する樹脂との関係で最適条件で行うことが好ましい。そのため、樹脂の種類と最適なエンボス加工条件の組合わせが問題となる。
可塑剤を排除した硬質の塩化ビニル樹脂フィルムは、加工性が劣る上、エンボス加工処理が一般に困難であるほかに、エンボス処理によって得た樹脂の美観が得られ難いという問題がある。また塩化ビニル樹脂に代えて、オレフィン系樹脂のポリエチレン、ポリプロピレン樹脂等を使用する場合にはこれらの樹脂のエンボス加工性は良好であるものの、金属板上に積層した後に加工した場合に加工部分が白色化して美感を損なうという問題がある。
この問題を解決するために、ゴム成分を添加配合するという提案があるが、ゴム成分を添加するとポリエチレン樹脂は塩化ビニル樹脂同様の軟質樹脂に変性してしまうという問題が新たに発生する。
また、ポリブチレンテレフタレート樹脂は耐水性及び水中に放置後の強度劣化が少ないという優れた特性を有するために、この分野の被覆材としては極めて有望であるが、通常の処理条件ではエンボス加工性が悪いためにこの目的のためには実用化されていなかった。
一方、最適エンボス加工条件の方は従来、あまり検討されたことはなくもっぱら経験的な知識の積み重ねによって現場的に対応されてきた場合が多い。
本発明は、上記、これらの課題を解決することを目的とし、従来の軟質塩化ビニル樹脂と同等以上のエンボス加工性に優れた樹脂フィルム及びその樹脂フィルムを被覆した高級感のある感性の豊かな化粧金属板を提供することを目的とする。
【発明の開示】
【０００３】
請求項１記載の化粧金属板は下記の特徴を有する。
すなわち、
「固有粘度（ＩＶ）が１．０〜１．４のポリブチレンテレフタレート（ＰＢＴ）樹脂フィルムの中から下記式で与えられるＴＭＡ（Ｔｈｅｒｍｏ Ｍｅｃｈａｎｉｃａｌ Ａｎａｌｙｓｉｓ）関係値が１０以下である樹脂フィルムを選択して金属板に積層し、下記の条件でエンボス加工処理を施したことを特徴とする化粧金属板。
ＴＭＡ関係値（℃）＝Ｔｓｅ−Ｔｓｓ、
ここで、
軟化開始温度Ｔｓｓ（℃）は、ＴＭＡにより測定され、
２ｍｍφで先端Ｒ＝０．２以下（先端角６０°）の針に荷重１００ｇをかけ、１０℃／ｍｉｎで昇温した時の針のフィルムへの進入深さをＪＩＳ−Ｋ−７１９６に準じて測定して得られた曲線における、
針が進入を始めるよりも低温側に認められる直線部分の高温側への延長と、
進入速度が最大となる部分の接線の低温側への延長との交点により求められる温度であり、
軟化終了温度Ｔｓｅ（℃）は、上記進入速度が最大となる部分の接線の高温側への延長と、
軟化終了後の高温側に認められる直線部分の低温側への延長との交点により求められる温度である。
エンボス加工処理条件：
彫刻ロールによる圧下処理でエンボス処理加工を行う場合において、ロールが樹脂フィルムと接触する部分の表面温度Ｔｒを、
前記ＴＭＡにより測定される軟化開始温度であるＴｓｓと、軟化終了温度であるＴｓｅと、及びＤＳＣにより測定されるＴｍｐとを基準として、
Ｔｓｓ−１０≦Ｔｒ≦Ｔｓｅ（℃）、かつＴｒ＜Ｔｍｐ（℃）に設定してエンボス加工処理を行う。」ものであることを特徴とする。
【発明を実施するための最良の形態】
【０００３】
本発明の発明者等は、樹脂フィルムの特性とエンボス加工性の関係について鋭意検討した結果、Ｔｈｅｒｍｏ Ｍｅｃｈａｎｉｃａｌ Ａｎａｌｙｓｉｓ（ＴＭＡ）による軟化開始温度Ｔｓｓ（℃）と軟化終了温度Ｔｓｅ（℃）から計算されるＴＭＡ関係値である（Ｔｓｅ−Ｔｓｓ）の値が１０以下の範囲内の樹脂であり、このような樹脂としては、例えばポリブチレンテレフタレート樹脂又はポリブチレンテレフタレート樹脂を含有するポリエチレンテレフタレート樹脂フィルム等がある。
上記の樹脂フィルムを原料として、その樹脂フィルムを化粧金属板上に被覆した後に、彫刻ロールによる圧下処理でエンボス処理加工を行う場合には、ロールが樹脂フィルムと接触する部分の表面温度Ｔｒを、ＴＭＡにより測定される軟化開始温度であるＴｓｓ、軟化終了温度であるＴｓｅ及びＤＳＣにより測定されるＴｍｐを基準として、Ｔｓｓ−１０≦Ｔｒ≦Ｔｓｅ（℃）、かつＴｒ＜Ｔｍｐ（℃）に設定してエンボス加工処理を行うことによって、これらの樹脂フィルムのエンボス加工性が飛躍的に向上するとともに、そのエンボス処理したフィルムを表面に有する化粧金属板からなる製品に従来品以上の高級感を付与できることを見出した。
【０００４】
この結果、このような特性を有する樹脂フィルムを積層加工（ラミネート加工）し、折り曲げ等の加工を施した場合にも加工部分が白色化して意匠性を損なうという問題はなく、塩化ビニル樹脂と同等以上のエンボス加工性を向上させることができ、さらに耐水性及び水中に放置後の強度劣化が少ないという、上記ポリブチレンテレフタレート樹脂等の優れた特性をそのまま維持することができた。
以下に本発明についてその内容を説明する。
本発明は、あらかじめ金属板に樹脂フィルムを接着しておいて、その後に金属板と樹脂フィルムを同時に彫刻ロールに一定速度で通過させてエンボス加工する。
【０００５】
（使用する金属板）
本発明で、エンボス加工処理前に樹脂フィルムを接着、ラミネート処理する金属板としては、鋼板、アルミニウム板、銅板等、広く金属板であれば用いることができる。鋼板としては、厚さ０．１０〜１．２０ｍｍの普通鋼冷延鋼板が好ましい。中でも、厚さ０．１０〜０．５０ｍｍの普通鋼冷延鋼板が好ましい。冷延製品の中でも低炭素又は極低炭素アルミキルド鋼板が好ましく使用されるが、Ｎｂ、Ｔｉ等を添加した非時効性鋼、３〜１８ｗｔ％のクロムを含むクロム含有鋼板、種々の組成を有するステンレス鋼板等も使用することができる。これら冷延鋼板の表面は表面処理がされているものが耐久性の点で好ましい。
表面処理方法としては、めっき処理、塗装処理等があり、めっき処理としては、例えば亜鉛めっき、亜鉛ーアルミニウム合金めっき、亜鉛ーコバルトーモリブデンめっき、錫めっき、ニッケルめっき、ニッケル・りんめっき、ニッケル・コバルトめっき、ニッケル・錫めっき等があり、また塗装処理としては種々の塗料をその性質に応じて焼き付け、塗装する方法で行われる。
【０００６】
（使用する樹脂フィルム等）
樹脂フィルム等の厚さは、特に限定しないが、例えば０．０２〜０．３０ｍｍ、好ましくは０．０８０〜０．１５０ｍｍのポリブチレンテレフタレート（ＰＢＴ）樹脂、ＰＢＴと他の樹脂との種々の割合のブレンド樹脂、たとえばポリエチレンテレフタレート（ＰＥＴ）樹脂、ポリカーボネート（ＰＣ）樹脂、アイオノマー樹脂等とのブレンド、又はこれらの３種以上の樹脂のブレンド、あるいはＰＢＴと他の樹脂又は化合物との共重合体、たとえばイソフタル酸、アジピン酸との共重合体の樹脂フィルム等、さらに上記種々の樹脂フィルム等を異なる厚さの比率で積層した複合樹脂フィルム等を使用することができる。
これらの樹脂フィルム等の中には着色樹脂等が入っていても差し支えない。２種以上のブレンド樹脂を使用する理由は、例えば衝撃強度には優れているが金属との接着性が劣る樹脂に対して、その接着性のみの改良を図るために金属との接着性の良好な樹脂をブレンドするようなケースであり、複合樹脂を使用するのは、金属との接着面に接着特性の優れた樹脂を使用するためである。
【０００７】
これらの樹脂フィルムに使用される樹脂は、下記式で与えられるＴＭＡ関係値が１０以下の範囲にあることが必要である。
ＴＭＡ関係値（℃）＝Ｔｓｅ−Ｔｓｓ ここで、Ｔｓｓ（℃）はＴＭＡにより測定される軟化開始温度であり、またＴｓｅ（℃）はＴＭＡにより測定される軟化終了温度である。
このようなＴＭＡ関係値の樹脂フィルムを原料樹脂フィルムとし、その樹脂フィルムを化粧金属板上に被覆した後に、彫刻ロールによる圧下処理でエンボス処理加工を行う場合には、ロールが樹脂フィルムと接触する部分の表面温度Ｔｒを、ＴＭＡにより測定される軟化開始温度であるＴｓｓ、軟化終了温度であるＴｓｅ及びＤＳＣにより測定されるＴｍｐを基準として、Ｔｓｓ−１０≦Ｔｒ≦Ｔｓｅ（℃）、かつＴｒ＜Ｔｍｐ（℃）に設定してエンボス加工処理を行う必要がある。
【０００８】
これらの樹脂フィルムは、エンボス加工処理直前に金属板上に被覆する。樹脂フィルムを金属板に被覆する方法には、エポキシ系、ポリエステル系、シアノアクリレート系等の接着剤を使用しても良いが、単に樹脂の融点以上に加熱しておいた金属板上に圧着する方法で接着しても良い。加熱圧着法で樹脂フィルムと金属板を接着させる場合には強固な接着力を得ることができるように金属板の表面を処理しておくことが好ましい。金属板の表面処理方法としては、電解クロム処理、接着プライマー処理等の当業界公知の方法を採用することができる。
【０００９】
樹脂のＴＭＡ関係値を１０以下に限定する理由は、Ｒａ＝１１μｍの凹凸彫刻ロール（砂目）を用いてエンボス加工をした場合に、従来用いられていた塩化ビニル樹脂フィルムのエンボス加工後の平均表面粗度がＲａで、４．０μｍであったから、従来品との比較においてエンボス性を良好とする平均表面粗度基準をＲａで４．０μｍとしたためである。このようなＴＭＡ関係値の樹脂フィルム等を使用するとエンボス加工性が改良される理由は、軟化開始点であるＴｓｓと、軟化終了点であるＴｓｅとの一定の温度範囲内では、エンボス加工処理に伴って発生する圧縮エネルギーや摩擦エネルギーをこの温度範囲で樹脂が効果的に吸収することができるために、冷却後も樹脂が高度の歪みを維持できるからではないかと考えられる。
【００１０】
また、このようなＴＭＡ関係値の樹脂フィルムを原料樹脂フィルムとし、彫刻ロールを使用して圧下エンボス加工処理する場合に、ロールの表面が原料樹脂フィルムと接触している部分の温度を、ＴＭＡにより測定される軟化開始温度であるＴｓｓ、軟化終了温度であるＴｓｅ及びＤＳＣにより測定されるＴｍｐを基準として、Ｔｓｓ−１０≦Ｔｒ≦Ｔｓｅ（℃）、かつＴｒ＜Ｔｍｐ（℃）に設定してエンボス加工処理を行う理由は、このような温度範囲でエンボス加工処理した場合には、その製品の高級感がきわめて優れているからである。
【００１１】
エンボス加工処理温度と、化粧金属板とのラミネート樹脂フィルムの有する感性の関係については、まだ不明な点が多いが、樹脂の軟化開始温度ともいう比較的結晶領域部分がまだ多く存在している時点で、歪みを与えることが高級感の発生につながるのではないかと考えられる。なお、ロール表面温度ＴｒをＤＳＣにより測定されるＴｍｐ（℃）より低く、かつＴＭＡで測定されるＴｓｅより低い、きわめて限定した温度範囲に設定する理由は樹脂がエンボス加工処理中にロールに接着して作業性が悪化することを防止するためである。
一般的にＴＭＡ関係値と、樹脂フィルムの平均表面粗度Ｒａの関係は逆相関関係となる傾向がある。この平均表面粗度Ｒａは商品の意匠的価値（意匠性）と大きな関係があって、４μｍ以上の範囲が適正値であると考えられている。なお、この平均表面粗度Ｒａのさらに好ましい範囲は５〜８である。
【００１２】
また、このようなＴＭＡ関係値の樹脂を使用して、その樹脂フィルムを接着、ラミネート加工した化粧金属板と共にエンボス加工処理した場合に、樹脂フィルムを接着、ラミネート加工した化粧金属板を使用した製品、例えば浴用バスの有する高級感は、第一にロールの表面が原料樹脂フィルムと接触する部分の温度を、ＴＭＡにより測定される軟化開始温度であるＴｓｓ、軟化終了温度であるＴｓｅを基準として、Ｔｓｓ−１０≦Ｔｒ≦Ｔｓｅ（℃）に設定してエンボス加工処理をすることが必要である。
【００１３】
その上、第二の条件として、ロール表面温度Ｔｒを、ＤＳＣにより測定されるＴｍｐを基準として、Ｔｒ≦Ｔｍｐ（℃）に設定してエンボス加工処理を行うことである。このような条件の組み合わせでエンボス加工を行った場合には、前記一定のＴＭＡ関係値を有する樹脂を接着、ラミネート加工した金属板を使用した製品はきわめて良好な質感、すなわち高級感のある製品が得られるという傾向がみられる。
【００１４】
ＴＭＡ関係値及びＤＳＣ関係値の計算に必要な諸元の測定は以下の条件で行った。まず、ＴＭＡ関係値の計算に必要な諸元の測定は以下の条件で行った。理学電機（株）製のＴＭＡ、ＴＡＳ−３００を用いて、２ｍｍφで先端Ｒ＝０．２以下（先端角６０°）の針に荷重１００ｇをかけ、１０℃／ｍｉｎで昇温した時の針のフィルムへの進入深さをＪＩＳ−Ｋ−７１９６に準じて測定した。図１にＴＭＡ関係値の測定曲線の一例を示す。ここで針の進入度は進入深さをフィルム厚みで割った値である。
【００１５】
軟化終了温度Ｔｓｅは、図１に示すように進入度が急激に変化する曲線と、軟化終了後のベース線の接線交点により求められる温度である。同様に軟化開始温度Ｔｓｓは、Ｔｓｅで用いた曲線の接線と、その近傍のベース線の接線交点により求められる温度である。
また、ＤＳＣによるＴｍｐの測定は以下の条件で行った。パーキンエルマー社製の示差熱量計ＤＳＣ−７を使用し、精秤した約５ｍｇの試料を窒素ガス雰囲気下において２０℃／分で昇温させ、吸熱ピークをＤＳＣの融点Ｔｍｐとした。
【００１６】
（エンボス加工処理方法）
樹脂フィルム等のエンボス加工処理方法は、例えば複層フィルムを直接チルドロールの間に通す方法、ブラウンフィルムを加熱してチルドロールの間に通す方法、回転スクリーンロールに通して真空の力でエンボス加工する方法、複層フィルムをパーフォレーター（目打ち機）に通すホットニードルプロセス、刻印ロールを使用して圧縮する方法等の種々の方法があるが、本発明の場合はＴダイから供給した樹脂フィルムを、別途供給した金属板に接着した上でエンボス加工する。
【００１７】
このような方法でエンボス加工する場合は、ロールの表面が原料樹脂フィルムと接触する部分の温度を、ＴＭＡにより測定される軟化開始温度であるＴｓｓ、軟化終了温度であるＴｓｅ及びＤＳＣにより測定されるＴｍｐを基準として、Ｔｓｓ−１０≦Ｔｒ≦Ｔｓｅ（℃）、かつＴｒ≦Ｔｍｐ（℃）の温度に設定して行う。エンボス形状としてはランダムマット、四角形、ダイヤモンド型、深絞り型、砂目（ＳＧ目と呼称する）等の種々の模様を、製品のニーズに応じて使用することができる。
【００１８】
（エンボス性の良否判定）
本発明における樹脂フィルム等のエンボス性の良否はその樹脂フィルムの表面粗度Ｒａ（μｍ）によって判断される。一般に良好なエンボス性とは樹脂の融点前後の温度で彫刻ロール等で圧下、エンボス加工したときに、容易にエンボス模様が樹脂フィルムの表面に形成され、かつその後、温度を上げた場合にも長時間、そのエンボス模様を維持していることをいう。
そのため、表面粗度の測定は、その樹脂のＴＭＡで測定した昇温過程における軟化開始温度Ｔｓｓ、軟化終了温度であるＴｓｅを基準として、Ｔｓｓ−１０≦Ｔｒ≦Ｔｓｅ（℃）、かつＴｒ≦Ｔｍｐ（℃）に設定した平均表面粗度Ｒａ＝１１ｍｍの凸凹の砂目の彫刻ロールに、樹脂フィルムを一定速度で通過させる。この場合におけるロールの表面温度の設定及び調節はロール内に設けた配管中に熱媒を一定量流す方法で行うことができる。
樹脂フィルムラミネート金属板はその後、室温に冷却して表面粗度Ｒａ（μｍ）を東京精密社製ＳＵＲＦＣＯＭ表面粗さ計を用いて、ＪＩＳ Ｂ０６０１に準拠して測定し、平均表面粗度が４．０以上をエンボス性良好とした。なお、この測定は、エンボス加工処理の終了した樹脂フィルムから、任意に５枚の樹脂試験片を採取して、その各試片について４個所の異なる場所の表面粗度を測定し、その平均値を計算して表面粗度Ｒａ（μｍ）とした。
実施例 以下、実施例により本発明をさらに具体的に説明する。
【００１９】
【実施例】
（実施例１）
炭素分が０．０３０％のアルミキルド冷延鋼板であって、厚さ０．５０ｍｍのものを用意し、この鋼板に０．００２ｍｍの厚さに亜鉛めっき処理をした。さらにこの亜鉛めっき鋼板を樹脂の融点Ｔｍｐ±１０℃に加熱して、表面上に厚さ０．１００ｍｍのＰＢＴ（ポリブチレンテレフタレート）樹脂フィルムであって、その固有粘度が１．４であり、ＴＭＡ関係値が７．２の樹脂フィルムを熱圧着してラミネート鋼板を作製した。次いで、エンボス処理ロールの表面温度を２１５℃に調節しつつ、砂目型の模様を有する刻印ロールを使用して、鋼板と樹脂を同時に圧着して、エンボス加工処理を行い、その後、室温に急冷却した。このように処理した鋼板上の樹脂フィルムのエンボス性を評価する平均表面粗度Ｒａは６．７μｍであった。
【００２０】
（実施例２〜４）
樹脂の種類を変えて、実施例１と同様のラミネート鋼板を作製して、使用した樹脂のＴＭＡによるＴｓｓ、軟化終了温度であるＴｓｅおよびＤＳＣによるＴｍｐ等の値に基づいてロールの温度を設定してエンボス加工処理を行ってエンボス性を評価した。
実施例２は固有粘度が実施例１と同様に１．４であるが、ＴＭＡ関係値が２．９のＰＢＴ樹脂を使用した場合であり、実施例３は固有粘度が１．０でＴＭＡ関係値が３．３のＰＢＴ樹脂を使用した場合であり、また実施例４はポリエチレンテレフタレート（ＰＥＴ）とイソフタル酸の１０ｍｏｌ％の共重合樹脂フィルム及びポリブチレンテレフタレート（ＰＢＴ）樹脂フィルムを１：４の厚さ比で積層した複層フィルム（ＴＭＡ関係値：８．７）をＰＢＴ層が彫刻ロールに接するように使用した場合である。
【００２１】
（比較例１、２）
樹脂の種類をさらに変えて、実施例１と同様のラミネート鋼板を作製して、使用した樹脂のＴＭＡによるＴｓｓ、軟化終了温度であるＴｓｅおよびＤＳＣによるＴｍｐ等の値に基づいてロールの温度を設定してエンボス加工処理を行ってエンボス性を評価した。比較例１はＴＭＡ関係値が２２．８のＰＥＴ樹脂を使用した場合であり、比較例２はＴＭＡ関係値が１８．９のポリカーボネート樹脂を使用した場合である。これら実施例及び比較例の条件と測定値を表１にまとめて示した。
以上のようにして得た試料について高級感の有無を調べるために以下のような試験を行った。まず、３０×２０ｃｍの大きさに切断したラミネート鋼板を３枚ずつ用意し、これを太陽光線の入らない室内のテーブル上に置き、試料の１ｍ上から２０Ｗの白色蛍光灯５本で照射する。年齢、性別の異なる５人の人に、観測場所及び角度を変えて以下のような評価点をつけてもらい、その評価点の平均値を求めて総合評価する。
評価点は、従来の塩ビラミネート鋼板と比較したときに、塩ビラミネート鋼板と同等以上の高級感がある場合を５点、塩ビラミネート鋼板より多少劣るがやや高級感の得られる場合を４点、塩ビラミネート鋼板に比較して安っぽいという感触の場合を３点とする。
このような評価をした場合、概ね表面粗度との相関があり、ＴＭＡ関係値が１０以下の樹脂フィルムを使用して、ロール温度ＴｒをＴＭＡによる軟化開始点のＴｓｓと軟化終了点のＴｓｅを使用して、Ｔｓｓ−１０≦Ｔｒ≦Ｔｓｅ（℃）の温度範囲で、かつＤＳＣによるＴｍｐを使用してＴｒ＜Ｔｍｐ（℃）の温度に設定して処理した実施例１〜４の試料は、いずれも十分な高級感があるという判定であった。これに対して、これらの要件にマッチしない比較例の試料の場合にはいずれも高級感は得られなかった。
【００２２】
【表１】
【産業上の利用可能性】
本発明の化粧金属板は、従来の軟質塩化ビニル樹脂と同等以上のエンボス加工性に優れており、高級感のある感性の豊かな樹脂被覆金属板である。また、本発明の化粧金属板は、ユニットバス、給水タンク、各種工業用品、缶等の比較的耐水性を必要とする建材、工業材料等に使用するのに好適な材料である。
【００２４】
【図面の簡単な説明】
図１は、ＴＭＡ関係値の測定曲線の一例である。【Technical field】
[0001]
The present invention is a resin film or sheet (hereinafter referred to as “resin”) , which is used for building materials and industrial materials that require relatively water resistance, such as unit baths, water supply tanks, various industrial articles, cans, etc. The present invention relates to a decorative metal plate coated with a film.
[Background]
[0002]
The decorative metal plate is widely used in building materials and industrial materials that require relatively water resistance, such as unit baths, water supply tanks, various industrial products, and cans. In this case, the main purpose of coating the resin film on the surface is to give the material metal plate an anticorrosive effect, but at the same time it has the purpose of giving the decorative metal plate a high-class feeling, and the embossed pattern has been conventionally used. It has been widely performed.
Conventionally, the material of the film to which the embossed pattern is added is used mainly for such purposes, mainly from the viewpoint of easy embossing and low cost. It has been.
However, soft vinyl chloride resin is softened by adding and mixing phthalic acids such as DBP (dibutyl phthalate) and DOP (dioctyl phthalate) as a plasticizer in order to facilitate molding. It is difficult to use in places where the height is high, and there are various problems in disposal of products containing them. Furthermore, the aesthetics of the product when the embossed resin film is bonded to a metal plate and laminated before use is often different depending on the metal plate used. In other words, the embossing treatment is used because there is a problem that the aesthetic sensibility such as high-quality feeling is easily influenced by the type of resin used in the product for the application and the embossing treatment conditions. It is preferable to carry out under optimum conditions in relation to the resin. Therefore, the combination of the type of resin and the optimum embossing conditions becomes a problem.
Hard vinyl chloride resin films from which a plasticizer is excluded have problems in that processability is inferior and embossing treatment is generally difficult, and the aesthetics of the resin obtained by embossing treatment are difficult to obtain. In addition, when using olefin resin polyethylene, polypropylene resin, etc. instead of vinyl chloride resin, the embossability of these resins is good, but when processed after being laminated on a metal plate, the processed part is There is a problem of whitening and impairing aesthetics.
In order to solve this problem, there is a proposal of adding and blending a rubber component. However, when the rubber component is added, a new problem arises in that the polyethylene resin is modified into a soft resin similar to vinyl chloride resin.
Polybutylene terephthalate resin is very promising as a coating material in this field because it has excellent properties such as water resistance and little deterioration in strength after standing in water. It was not put into practical use for this purpose because of its badness.
On the other hand, the optimum embossing conditions have not been studied so far and are often dealt with on the spot by accumulating empirical knowledge.
The present invention aims to solve the above-mentioned problems, and has a resin film excellent in embossing workability equal to or higher than that of a conventional soft vinyl chloride resin and a rich and high-quality sensibility coated with the resin film. An object is to provide a decorative metal plate.
DISCLOSURE OF THE INVENTION
[0003]
The decorative metal plate according to
That is,
“From a polybutylene terephthalate (PBT) resin film having an intrinsic viscosity (IV) of 1.0 to 1.4, a resin film having a TMA (Thermo Mechanical Analysis) relation value given by the following formula is 10 or less is selected. A decorative metal plate characterized by being laminated on a metal plate and embossed under the following conditions.
TMA-related value (° C.) = Tse−Tss,
here,
The softening start temperature Tss (° C.) is measured by TMA,
The penetration depth of the needle into the film when a load of 100 g is applied to a needle with a tip of R = 0.2 or less (tip angle 60 °) at 2 mmφ and the temperature is raised at 10 ° C./min according to JIS-K-7196. In the curve obtained by measurement,
The extension of the straight line portion that is recognized on the low temperature side from the start of the needle to the high temperature side,
It is the temperature obtained by the intersection with the extension of the tangent of the part where the approach speed is maximum to the low temperature side,
The softening end temperature Tse (° C.) is the extension of the tangential line where the entry speed is maximum to the high temperature side,
This is the temperature obtained by the intersection with the extension of the straight line portion observed on the high temperature side after the end of softening to the low temperature side.
Embossing processing conditions:
In the case of performing embossing processing by the rolling process by the engraving roll, the surface temperature Tr of the part where the roll contacts the resin film is
Based on Tss that is the softening start temperature measured by the TMA, Tse that is the softening end temperature, and Tmp that is measured by DSC,
The embossing process is performed by setting Tss-10 ≦ Tr ≦ Tse (° C.) and Tr <Tmp (° C.). It is characterized by that.
BEST MODE FOR CARRYING OUT THE INVENTION
[0003]
As a result of intensive studies on the relationship between the properties of the resin film and embossability, the inventors of the present invention are calculated from the softening start temperature Tss (° C.) and the softening end temperature Tse (° C.) by Thermo Mechanical Analysis (TMA). The TMA-related value (Tse-Tss) is a resin having a value of 10 or less. Examples of such a resin include a polybutylene terephthalate resin or a polyethylene terephthalate resin film containing a polybutylene terephthalate resin. .
When the resin film is used as a raw material and the resin film is coated on a decorative metal plate and then embossed by a sculpture roll, the surface temperature Tr of the part where the roll comes into contact with the resin film, Tss-10 ≦ Tr ≦ Tse (° C.) and Tr <Tmp (° C.) are set on the basis of Tss as the softening start temperature measured by TMA, Tse as the softening end temperature, and Tmp measured by DSC. By embossing treatment, the embossability of these resin films can be dramatically improved, and a product made of a decorative metal plate having the embossed film on the surface can be given a higher-class feeling than conventional products. I found.
[0004]
As a result, even when a resin film having such characteristics is laminated (laminated) and subjected to processing such as bending, there is no problem that the processed portion is whitened and the design is not impaired, and is equivalent to vinyl chloride resin. The above-described embossability could be improved, and the excellent properties of the polybutylene terephthalate resin and the like, such as water resistance and less deterioration in strength after standing in water, could be maintained as they were.
The contents of the present invention will be described below.
In the present invention, a resin film is bonded to a metal plate in advance, and then the metal plate and the resin film are simultaneously passed through an engraving roll at a constant speed for embossing.
[0005]
(Metal plate used)
In the present invention, the metal plate to which the resin film is bonded and laminated before the embossing treatment can be widely used as long as it is a steel plate, an aluminum plate, a copper plate, or the like. As the steel plate, a plain steel cold-rolled steel plate having a thickness of 0.10 to 1.20 mm is preferable. Among these, a plain steel cold-rolled steel sheet having a thickness of 0.10 to 0.50 mm is preferable. Among cold-rolled products, low-carbon or ultra-low-carbon aluminum killed steel plates are preferably used, but non-aging steels added with Nb, Ti, etc., chromium-containing steel plates containing 3-18 wt% chromium, stainless steels having various compositions Steel plates and the like can also be used. The surface of these cold-rolled steel sheets is preferably surface-treated in terms of durability.
Surface treatment methods include plating, coating, etc. Examples of plating treatment include zinc plating, zinc-aluminum alloy plating, zinc-cobalt-molybdenum plating, tin plating, nickel plating, nickel / phosphorus plating, nickel There are cobalt plating, nickel / tin plating, and the coating process is performed by baking and coating various paints according to the properties.
[0006]
(Resin film used)
The thickness of the resin film or the like is not particularly limited. For example, 0.02 to 0.30 mm, preferably 0.080 to 0.150 mm of polybutylene terephthalate (PBT) resin, various ratios of PBT and other resins. Blend resins such as polyethylene terephthalate (PET) resin, polycarbonate (PC) resin, ionomer resin and the like, blends of three or more of these resins, or copolymers of PBT with other resins or compounds, For example, a resin film of a copolymer with isophthalic acid or adipic acid, or a composite resin film obtained by laminating the above-described various resin films at different thickness ratios can be used.
These resin films or the like may contain colored resins or the like. The reason for using two or more kinds of blended resins is that, for example, a resin having excellent impact strength but poor adhesion to metal has good adhesion to metal in order to improve only the adhesion. This is a case in which various resins are blended, and the composite resin is used because a resin having excellent adhesive properties is used for the adhesive surface with the metal.
[0007]
The resin used for these resin films is required to have a TMA-related value given by the following formula in the range of 10 or less.
TMA-related value (° C.) = Tse−Tss where Tss (° C.) is a softening start temperature measured by TMA, and Tse (° C.) is a softening end temperature measured by TMA.
When a resin film having such a TMA relation value is used as a raw material resin film and the resin film is coated on a decorative metal plate, the roll comes into contact with the resin film when embossing is performed by a reduction process using an engraving roll. The surface temperature Tr of the portion is defined as Tss-10 ≦ Tr ≦ Tse (° C.) and Tr <, with Ts being the softening start temperature measured by TMA, Tse being the softening end temperature, and Tmp being measured by DSC. It is necessary to perform the embossing process at Tmp (° C.).
[0008]
These resin films are coated on a metal plate immediately before the embossing treatment. For the method of coating the resin film on the metal plate, an epoxy, polyester, or cyanoacrylate adhesive may be used, but it is simply crimped onto the metal plate that has been heated above the melting point of the resin. You may adhere by the method. When the resin film and the metal plate are bonded by the thermocompression bonding method, it is preferable to treat the surface of the metal plate so that a strong adhesive force can be obtained. As a surface treatment method for the metal plate, methods known in the art such as electrolytic chrome treatment and adhesion primer treatment can be employed.
[0009]
The reason why the TMA relationship value of the resin is limited to 10 or less is that when embossing is performed using an uneven engraving roll (grained) with Ra = 11 μm, the average after embossing of a vinyl chloride resin film that has been conventionally used This is because the surface roughness Ra was 4.0 μm, and therefore, the average surface roughness standard for improving the embossability in comparison with the conventional product was Ra 4.0 μm. The reason why the embossability is improved by using such a resin film having a TMA-related value is that embossing treatment is performed within a certain temperature range of Tss as the softening start point and Tse as the softening end point. It is thought that because the resin can effectively absorb the compression energy and friction energy generated in this temperature range within this temperature range, the resin can maintain a high degree of strain even after cooling.
[0010]
Moreover, when the resin film of such a TMA relation value is used as a raw material resin film, and the embossing process is performed using an engraving roll, the temperature of the portion where the surface of the roll is in contact with the raw material resin film is determined by TMA. Emboss by setting Tss-10 ≦ Tr ≦ Tse (° C.) and Tr <Tmp (° C.) with reference to Tss, which is the softening start temperature measured, Tse, the softening end temperature, and Tmp measured by DSC. The reason why the processing is performed is that when the embossing processing is performed in such a temperature range, the high-quality feeling of the product is extremely excellent.
[0011]
Although there are still many unclear points regarding the relationship between the embossing temperature and the sensitivity of the laminated resin film with the decorative metal plate, there are still relatively many crystalline regions called the softening start temperature of the resin. Therefore, it is thought that giving a distortion leads to the generation of a high-class feeling. The reason why the roll surface temperature Tr is set to a very limited temperature range lower than Tmp (° C.) measured by DSC and lower than Tse measured by TMA is that the resin adheres to the roll during the embossing process. This is to prevent the workability from deteriorating.
In general, the relationship between the TMA relationship value and the average surface roughness Ra of the resin film tends to be inversely correlated. This average surface roughness Ra has a large relationship with the design value (designability) of the product, and a range of 4 μm or more is considered to be an appropriate value. In addition, the more preferable range of this average surface roughness Ra is 5-8.
[0012]
In addition, a product using a decorative metal plate that is bonded and laminated with a resin film when such resin with a TMA value is used and the resin film is embossed together with a decorative metal plate that is bonded and laminated. For example, the luxury of a bath for bathing is based on the temperature of the part where the surface of the roll is in contact with the raw material resin film, Tss, which is the softening start temperature measured by TMA, and Tse, which is the softening end temperature. It is necessary to perform embossing by setting Tss-10 ≦ Tr ≦ Tse (° C.).
[0013]
In addition, the second condition is to perform the embossing process by setting the roll surface temperature Tr to Tr ≦ Tmp (° C.) with reference to Tmp measured by DSC. When embossing is performed under such a combination of conditions, a product using a metal plate obtained by bonding and laminating a resin having a certain value related to TMA has a very good texture, that is, a high-grade product. There is a tendency to be obtained.
[0014]
Measurements of specifications necessary for calculation of TMA-related values and DSC-related values were performed under the following conditions. First, specifications required for calculating TMA-related values were measured under the following conditions. Using TMA and TAS-300 manufactured by Rigaku Denki Co., Ltd. Needle when a load of 100 g is applied to a needle with 2 mmφ and tip R = 0.2 or less (tip angle 60 °) and the temperature is raised at 10 ° C./min. The penetration depth into the film was measured according to JIS-K-7196. FIG. 1 shows an example of a measurement curve of TMA related values. Here, the penetration degree of the needle is a value obtained by dividing the penetration depth by the film thickness.
[0015]
As shown in FIG. 1, the softening end temperature Tse is a temperature obtained by a tangent intersection between a curve in which the degree of penetration changes abruptly and the base line after the end of softening. Similarly, the softening start temperature Tss is a temperature obtained from the tangent intersection of the tangent of the curve used in Tse and the base line in the vicinity thereof.
The Tmp measurement by DSC was performed under the following conditions. A differential calorimeter DSC-7 manufactured by Perkin Elmer was used, and a precisely weighed sample of about 5 mg was heated at 20 ° C./min in a nitrogen gas atmosphere, and the endothermic peak was defined as the melting point Tmp of DSC.
[0016]
(Embossing processing method)
Embossing treatment method for resin film, etc., for example, a method of passing a multilayer film directly between chilled rolls, a method of heating a brown film between chilled rolls, a embossing with a rotating screen roll by vacuum force There are various methods such as a method of performing, a hot needle process in which a multilayer film is passed through a perforator (a perforator), and a method of compressing using a marking roll. In the present invention, a resin film supplied from a T die Is bonded to a separately supplied metal plate and embossed.
[0017]
When embossing is performed by such a method, the temperature of the portion where the roll surface comes into contact with the raw resin film is measured by Tss, which is the softening start temperature measured by TMA, Tse, which is the softening end temperature, and DSC. Using Tmp as a reference, the temperature is set to Tss−10 ≦ Tr ≦ Tse (° C.) and Tr ≦ Tmp (° C.). As the embossed shape, various patterns such as a random mat, a square, a diamond shape, a deep drawing type, and a grain (referred to as SG) can be used according to the needs of the product.
[0018]
(Embossing quality judgment)
The quality of embossing of the resin film or the like in the present invention is determined by the surface roughness Ra (μm) of the resin film. In general, good embossability means that an embossed pattern is easily formed on the surface of a resin film when it is pressed and embossed with a sculpture roll at a temperature around the melting point of the resin. It means that the embossed pattern is maintained for a time.
Therefore, the measurement of the surface roughness is based on the softening start temperature Tss and the softening end temperature Tse in the temperature rising process measured by TMA of the resin, with Tss-10 ≦ Tr ≦ Tse (° C.) and Tr ≦ Tmp. The resin film is passed at a constant speed through an uneven grain engraving roll having an average surface roughness Ra = 11 mm set at (° C.). In this case, the setting and adjustment of the surface temperature of the roll can be performed by a method in which a certain amount of heat medium is caused to flow through a pipe provided in the roll.
The resin film laminated metal plate is then cooled to room temperature, and the surface roughness Ra (μm) is measured using a SURFCOM surface roughness meter manufactured by Tokyo Seimitsu Co., Ltd. according to JIS B0601, and the average surface roughness is 4. An embossing property of 0 or more was considered good. In this measurement, five resin test pieces are arbitrarily sampled from the resin film that has been subjected to the embossing treatment, and the surface roughness at four different locations is measured for each test piece. Was calculated as the surface roughness Ra (μm).
EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples.
[0019]
【Example】
(Example 1)
An aluminum-killed cold-rolled steel sheet having a carbon content of 0.030% and a thickness of 0.50 mm was prepared, and this steel sheet was galvanized to a thickness of 0.002 mm. Furthermore, this galvanized steel sheet is heated to a melting point Tmp ± 10 ° C. of the resin, and is a PBT (polybutylene terephthalate) resin film having a thickness of 0.100 mm on the surface, and its intrinsic viscosity is 1.4. A laminated steel sheet was produced by thermocompression bonding of a resin film having a relational value of 7.2. Next, while adjusting the surface temperature of the embossing roll to 215 ° C., the embossing treatment is performed by simultaneously pressing the steel plate and the resin using a stamping roll having a grained pattern, and then suddenly reaching room temperature. Cooled down. The average surface roughness Ra for evaluating the embossability of the resin film on the steel sheet thus treated was 6.7 μm.
[0020]
(Examples 2 to 4)
By changing the type of resin, the same laminated steel plate as in Example 1 was prepared, and the temperature of the roll was set based on the values of Tss by TMA of the resin used, Tse which is the softening end temperature, Tmp by DSC, etc. The embossing process was performed and the embossability was evaluated.
Example 2 has an intrinsic viscosity of 1.4 as in Example 1, but a PBT resin having a TMA-related value of 2.9 is used, and Example 3 has an intrinsic viscosity of 1.0 and a TMA-related value. This is a case where a PBT resin having a value of 3.3 was used. In Example 4, a 10 mol% copolymer resin film of polyethylene terephthalate (PET) and isophthalic acid and a polybutylene terephthalate (PBT) resin film were used in a ratio of 1: 4. This is a case where a multilayer film (TMA related value: 8.7) laminated at a thickness ratio is used so that the PBT layer is in contact with the engraving roll.
[0021]
(Comparative Examples 1 and 2)
By further changing the type of resin, the same laminated steel plate as in Example 1 was produced, and the roll temperature was set based on the Tss by TMA of the resin used, Tse which is the softening end temperature, and Tmp by DSC. Then, an embossing treatment was performed to evaluate the embossing property. Comparative Example 1 is a case where a PET resin having a TMA-related value of 22.8 is used, and Comparative Example 2 is a case where a polycarbonate resin having a TMA-related value of 18.9 is used. Table 1 shows the conditions and measured values of these examples and comparative examples.
In order to examine the presence or absence of a high-quality feeling for the sample obtained as described above, the following test was performed. First, three laminated steel sheets cut to a size of 30 × 20 cm are prepared, placed on a room table where sunlight does not enter, and irradiated with five 20 W white fluorescent lamps from 1 m above the sample. Five people with different ages and genders are given the following evaluation points by changing the observation place and angle, and the average value of the evaluation points is obtained and comprehensively evaluated.
The evaluation score is 5 points when there is a high-grade feeling equal to or higher than that of the conventional PVC-laminated steel sheet, 4 points when it is slightly inferior to the PVC-laminated steel sheet, but a slightly high-grade feeling is obtained. Three points are given for the feeling of being cheap compared to the laminated steel plate.
When such an evaluation is performed, there is a correlation with the surface roughness, and a TMA-related value of 10 or less is used, and the roll temperature Tr is set to the softening start point Tss and the softening end point Tse by TMA. Samples of Examples 1 to 4 processed using Tss-10 ≦ Tr ≦ Tse (° C.) and set to a temperature of Tr <Tmp (° C.) using Tmp by DSC. Both were judged to have a sufficient luxury. On the other hand, in the case of the samples of comparative examples that do not match these requirements, no high-class feeling was obtained.
[0022]
[Table 1]
[Industrial applicability]
The decorative metal plate of the present invention is a resin-coated metal plate that is excellent in embossing property equivalent to or better than that of a conventional soft vinyl chloride resin, and has a high-class feeling and rich sensitivity . The decorative metal plate of the present invention is a material suitable for use in building materials, industrial materials, and the like that require relatively water resistance, such as unit baths, water supply tanks, various industrial products, and cans.
[0024]
[Brief description of the drawings]
FIG. 1 is an example of a measurement curve of TMA related values.
Claims (1)
ＴＭＡ関係値（℃）＝Ｔｓｅ−Ｔｓｓ、
ここで、
軟化開始温度Ｔｓｓ（℃）は、ＴＭＡにより測定され、
２ｍｍφで先端Ｒ＝０．２以下（先端角６０°）の針に荷重１００ｇをかけ、１０℃／ｍｉｎで昇温した時の針のフィルムへの進入深さをＪＩＳ−Ｋ−７１９６に準じて測定して得られた曲線における、
針が進入を始めるよりも低温側に認められる直線部分の高温側への延長と、
進入速度が最大となる部分の接線の低温側への延長との交点により求められる温度であり、
軟化終了温度Ｔｓｅ（℃）は、上記進入速度が最大となる部分の接線の高温側への延長と、
軟化終了後の高温側に認められる直線部分の低温側への延長との交点により求められる温度である。
エンボス加工処理条件：
彫刻ロールによる圧下処理でエンボス処理加工を行う場合において、ロールが樹脂フィルムと接触する部分の表面温度Ｔｒを、
前記ＴＭＡにより測定される軟化開始温度であるＴｓｓと、軟化終了温度であるＴｓｅと、及びＤＳＣにより測定されるＴｍｐとを基準として、
Ｔｓｓ−１０≦Ｔｒ≦Ｔｓｅ（℃）、かつＴｒ＜Ｔｍｐ（℃）に設定してエンボス加工処理を行う。 From among polybutylene terephthalate (PBT) resin films having an intrinsic viscosity (IV) of 1.0 to 1.4, a resin film having a TMA (Thermo Mechanical Analysis) relation value given by the following formula is 10 or less is selected. A decorative metal plate characterized by being laminated on a plate and embossed under the following conditions.
TMA-related value (° C.) = Tse−Tss,
here,
The softening start temperature Tss (° C.) is measured by TMA,
The penetration depth of the needle into the film when a load of 100 g is applied to a needle with a tip of R = 0.2 or less (tip angle 60 °) at 2 mmφ and the temperature is raised at 10 ° C./min according to JIS-K-7196. In the curve obtained by measurement,
The extension of the straight line portion that is recognized on the low temperature side from the start of the needle to the high temperature side,
It is the temperature obtained by the intersection with the extension of the tangent of the part where the approach speed is maximum to the low temperature side,
The softening end temperature Tse (° C.) is the extension of the tangential line where the entry speed is maximum to the high temperature side,
This is the temperature obtained by the intersection with the extension of the straight line portion observed on the high temperature side after the end of softening to the low temperature side.
Embossing processing conditions:
In the case of performing embossing processing by the rolling process by the engraving roll, the surface temperature Tr of the part where the roll contacts the resin film is
Based on Tss that is the softening start temperature measured by the TMA, Tse that is the softening end temperature, and Tmp that is measured by DSC,
The embossing process is performed by setting Tss-10 ≦ Tr ≦ Tse (° C.) and Tr <Tmp (° C.).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31163898 | 1998-11-02 | ||
| PCT/JP1999/006060 WO2000026283A1 (en) | 1998-11-02 | 1999-10-29 | Resin film excellent in embossing capability, embossing method for the resin film, decorative metal sheet coated with the resin film |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005109252A Division JP2005220359A (en) | 1998-11-02 | 2005-04-05 | Resin film excellent in emboss processability, method for emboss processing and decorative metal sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP4141642B2 true JP4141642B2 (en) | 2008-08-27 |
Family
ID=18019686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000579666A Expired - Fee Related JP4141642B2 (en) | 1998-11-02 | 1999-10-29 | Decorative metal plate |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4141642B2 (en) |
| AU (1) | AU6368399A (en) |
| TW (1) | TW459006B (en) |
| WO (1) | WO2000026283A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60255416A (en) * | 1984-06-01 | 1985-12-17 | Mitsui Toatsu Chem Inc | Preparation of thermoplastic resin sheet with embossed pattern having large unevenness |
| JPH0668032B2 (en) * | 1986-04-21 | 1994-08-31 | 三井石油化学工業株式会社 | Skin material |
| JPH0939094A (en) * | 1995-08-03 | 1997-02-10 | Toyo Kohan Co Ltd | Production of laminated sheet |
| JPH10235734A (en) * | 1997-02-26 | 1998-09-08 | Sekisui Chem Co Ltd | Method of manufacturing embossed sheet |
-
1999
- 1999-10-29 JP JP2000579666A patent/JP4141642B2/en not_active Expired - Fee Related
- 1999-10-29 WO PCT/JP1999/006060 patent/WO2000026283A1/en active Application Filing
- 1999-10-29 AU AU63683/99A patent/AU6368399A/en not_active Abandoned
- 1999-10-30 TW TW88118863A patent/TW459006B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
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| AU6368399A (en) | 2000-05-22 |
| WO2000026283A1 (en) | 2000-05-11 |
| TW459006B (en) | 2001-10-11 |
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