JP5553542B2 - 樹脂シート積層鋼板 - Google Patents
樹脂シート積層鋼板 Download PDFInfo
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- JP5553542B2 JP5553542B2 JP2009150861A JP2009150861A JP5553542B2 JP 5553542 B2 JP5553542 B2 JP 5553542B2 JP 2009150861 A JP2009150861 A JP 2009150861A JP 2009150861 A JP2009150861 A JP 2009150861A JP 5553542 B2 JP5553542 B2 JP 5553542B2
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- steel plate
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Description
(1) Tダイスから押し出す際に、可塑化した樹脂に金属板を圧着して包埋して樹脂シート(b)を製造する。
(2) 樹脂シート(a)、(b)の両面に必要に応じて接着剤を塗布し、鋼板、樹脂シート(b)、樹脂シート(a)、樹脂シート(b)、鋼板の順に積層し、常温もしくは加熱しながら加圧する。
ユニチカ製PET(1346P)、東レ製PBT(トレコン1401)、宇部興産製6−ナイロン(1013A)、三井デシュポン製アイオノマー(ハイミラン1702)、JSR製エチレンブテンゴムEBMを原料に、Tダイス付押し出し機で(押し出し温度230〜250℃)、0.4〜0.7mm厚みのPET、PBT、PET/EBM/アイオノマー=90/10/10(質量比)としたアロイポリマー、ナイロンの各種樹脂シートを作成した。さらに、ホモPP(MFR=1.5g/10分、Tm=159℃)の樹脂シートを同様にして作成した(押し出し温度220℃)。
表2のティンフリースチール(TFS)、SUS箔(SUS304)、冷延鋼板(JISG3141、SPCC)、Al箔(3003)、Al板(A1050P−H24 相当)を使用し、樹脂シート(b)に包埋される金属板とした。金属板3〜9では、表2に示す加工で細孔部を付与した。なお、金属板9のハニカム製法加工では、Al箔上に、表3に示す接着剤をプリントロールで条線状に塗布し、所定のサイズに裁断した。この後、条線状接着剤が半ピッチずれるように多数枚数重ね合わせ、250℃、1MPaで2分間加熱硬化させた。当該ブロックを所定厚みに水流ジェットを利用してスライスし、展伸してAlハニカムを得た。
表層鋼板として、TFS(板厚0.18mm、引張り破断伸び35%)、GIめっき鋼板(板厚0.3mm、Znめっき量120g/m2、引張り破断伸び45%)、ハイテン鋼板(板厚0.7mm、引張り破断伸び%)を用いた。鋼板、樹脂シート(b)、樹脂シート(a)、樹脂シート(b)、鋼板の順に積層し、前述の樹脂シートが可塑化する温度まで加熱した。加熱後、圧着力10kgf/cm2(0.98MPa)で2分間加熱圧着し、この後室温まで冷却して樹脂シート積層鋼板を得た。なお、各層の界面には表4の接着層(厚み3μm)を設けた。各々の樹脂シート積層鋼板の板密度ρを(4)式により算出した。
ρ=vaρa+vbρb+vsρs ・・・ (4)
ここで、va、vb、vs、ρa、ρb、ρsは、各々樹脂シート(a)、(b)、表層鋼板の体積分率及び密度である。なお、接着層の厚みは、樹脂シート積層鋼板全体の厚みに比べて、非常に薄いため、その影響は無視できるものとして扱う。
tp=12D/Es ・・・ (5)
Wp=ρstp ・・・ (6)
ここで、Esは表層鋼板のヤング率で180GPa、Wpは樹脂シート積層鋼板と同一の剛性を有する鋼板の単位面積当たりの質量である。
δ=Pel3/48D ・・・ (7)
ここで、Pe:実測荷重、δ:撓み量、l:支点間距離である。
Dp=Es/12(ρ/ρs)3 ・・・ (8)
M=Pl/4b ・・・ (9)
Mp=Ts/4(ρ/ρs)2 ・・・ (10)
ここで、P:曲げ最大荷重、Ts:420(MPa)=鋼板の引張強度、l:支点間距離、b:試験片幅である。
SR=(H鋼板−H樹脂シート積層鋼板)/H鋼板 ・・・ (11)
ここで、SR:スプリングバック率、H樹脂シート積層鋼板:樹脂シート積層鋼板ハット曲げ片の高さ、H鋼板:表層鋼板単体のハット曲げ片の高さである。表層鋼板単体よりも樹脂シート複合鋼板のスプリングスプリングバックが大きいと、H樹脂シート積層鋼板<H鋼板となり、SRが大きくなる。
また、上記実施例2−4で用いた樹脂シート積層鋼板のサンプルを用いて、JIS G0602に準拠した片持ち梁共振法により、各鋼板サンプルの制振性能を評価した(実施例23−25)。ここで、制振性能は、2次共振周波数での損失係数で評価した(大きいほど制振性能が良好)。
Claims (6)
- 樹脂シート(a)の両面に、金属板を包埋した樹脂シート(b)と、当該樹脂シート(b)の前記樹脂シート(a)と接する面と反対側の面に鋼板とを少なくとも順次積層してなる樹脂シート積層鋼板であって、
前記樹脂シート(a)が、ヤング率を50MPa以上、180℃での貯蔵弾性率を1MPa以上有し、
前記樹脂シート(b)は、ヤング率を50MPa以上、180℃での貯蔵弾性率を1MPa以上有する基材を金属板の両面に積層し、前記基材を前記金属板に所定温度での加熱下で圧着することで作製されることを特徴とする、樹脂シート積層鋼板。 - 前記金属板に形成された複数の細孔部の開孔率が30%以上であり、
前記細孔部間のバーの幅が、当該バーの厚みの0.2倍以上かつ2倍以下であり、
前記細孔部は、前記金属板を完全に貫通していることを特徴とする、請求項1に記載の樹脂シート積層鋼板。 - 前記バーの幅が、当該バーの厚みの0.6倍以上かつ1.3倍以下であることを特徴とする、請求項2に記載の樹脂シート積層鋼板。
- 前記樹脂シート(a)及び前記樹脂シート(b)の基材が、発泡体であることを特徴とする、請求項1〜3のいずれか1項に記載の樹脂シート積層鋼板。
- 前記樹脂シートの基材が、最隣接気泡距離が5μm以下である発泡体であることを特徴とする、請求項4に記載の樹脂シート積層鋼板。
- 前記樹脂シート(b)と前記鋼板との間に、100〜160℃での貯蔵弾性率G’が0.05MPa以上100GPa以下である接着層が積層されることを特徴とする、請求項1〜5のいずれか1項に記載の樹脂シート積層鋼板。
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US11433639B2 (en) | 2017-11-14 | 2022-09-06 | Hanwha Chemical Corporation | Lightweight sandwich steel sheet using polyamide, and manufacturing method therefor |
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