JP4393880B2 - 薄幅溝を有する合成樹脂発泡成形体 - Google Patents
薄幅溝を有する合成樹脂発泡成形体 Download PDFInfo
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- JP4393880B2 JP4393880B2 JP2004017991A JP2004017991A JP4393880B2 JP 4393880 B2 JP4393880 B2 JP 4393880B2 JP 2004017991 A JP2004017991 A JP 2004017991A JP 2004017991 A JP2004017991 A JP 2004017991A JP 4393880 B2 JP4393880 B2 JP 4393880B2
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Images
Description
(1)前記薄幅溝の深さを2種以上に設定した、
(2)前記薄幅溝が有底である、
(3)薄幅溝の形状が、直線、曲線、ジグザグ線の何れか1以上である、
(4)前記薄幅溝の配置が、平行、格子状、千鳥状、円形状、多角形状、渦巻き状、放射状からなる群から選ばれるいずれか一つ以上である、
(5)前記薄幅溝を合成樹脂発泡体の表面と裏側に設けてなり、更に好ましくは前記合成樹脂発泡体の表面と裏側とで、薄幅溝の深さ、薄幅溝の幅、溝間ピッチのいずれか一つ以上が異である、
ことを特徴とする前記記載の吸音用合成樹脂発泡成形体に関する。
(実施例1)
型内発泡成形による本願発明の製品としては、300×400×60t(mm)の板状製品を成形する金型内に幅2mm、長さ50mmの板を30mmピッチで、溝深さが40mmとなるように並行配置し、製品倍率が30倍となる原料(LBS30;鐘淵化学工業(株)製エペランPP)にて成形を行った。吸音測定は成形後にサンプルを切り出して実施した。
(実施例2)
ポリプロピレンを主原料とする型内発泡成形品(発泡倍率30倍、鐘淵化学工業(株)製エペランPPを使用)に、約300℃に板状部材先端を加熱した装置を用いて、後加工により短手の溝幅2mm、溝間ピッチ15mm、長手の溝幅30mm、溝深さ40mmを並行配置するように形成した。
(実施例3)
ポリプロピレンを主原料とする型内発泡成形品(発泡倍率30倍、鐘淵化学工業(株)製エペランPPを使用)に、約300℃に板状部材先端を加熱した装置を用いて、後加工により溝幅1mm、溝間ピッチ15mm、長さ15mm、溝深さ40mmの薄幅溝を並行配置するように形成した。
(実施例4)
ポリプロピレンを主原料とする型内発泡成形品(発泡倍率30倍、鐘淵化学工業(株)製エペランPPを使用)に、板状部材先端を約300℃程度に加熱し、後加工により幅0.5mm、溝間ピッチ15mm、長さ50mm、溝深さ40mmの薄幅溝を並行配置するように形成した。
(実施例5)
ポリプロピレンを主原料とする型内発泡成形品(発泡倍率30倍、鐘淵化学工業(株)製エペランPPを使用)に、板状部材先端を約300℃程度に加熱し、後加工により幅0.5mm、溝間ピッチ15mm、長さ50mm、溝深さ20mmの薄幅溝を並行配置するように形成した。
(参考例)
ポリプロピレンを主原料とするビーズ型内発泡成形品(発泡倍率30倍、鐘淵化学工業(株)製エペランPPを使用)で、薄幅溝の加工なしのものについて評価を行った。
(比較例1)
ポリプロピレンを主原料とする型内発泡成形品(発泡倍率30倍、鐘淵化学工業(株)製エペランPPを使用)に、板状部材先端を約300℃程度に加熱し、後加工により幅0.5mm、溝間ピッチ15mm、長さ50mmの薄幅を並行配置するように形成した。
(比較例2)
ポリプロピレンを主原料とする型内発泡成形品(発泡倍率30倍、鐘淵工業(株)製エペランPPを使用)に、針状部材先端を約300℃程度に加熱し、後加工により口径2mm、ピッチ8mmの吸音孔を形成した。
(比較例3)
ポリプロピレンを主原料とする型内発泡成形品(発泡倍率30倍、鐘淵工業(株)製エペランPPを使用)に、針状部材先端を約300℃程度に加熱し、後加工により口径5mm、ピッチ9mmの吸音孔を形成した。
Claims (7)
- 複数の有底及び/又は貫通した薄幅溝を有する合成樹脂発泡成形体であって、一つの薄幅溝の幅が0.5mm以上2mm以下、薄幅溝の長さが15mm以上50mm以下であり、薄幅溝の開口率が1.7%以上6.1%以下であることを特徴とする吸音用合成樹脂発泡成形体。
- 前記薄幅溝の深さを2種以上に設定したことを特徴とする請求項1に記載の吸音用合成樹脂発泡成形体。
- 前記薄幅溝が有底であることを特徴とする請求項1または2に記載の吸音用合成樹脂発泡成形体。
- 薄幅溝の形状が、直線、曲線、ジグザグ線の何れか1以上であることを特徴とする請求項1〜3いずれか一項に記載の吸音用合成樹脂発泡成形体。
- 前記薄幅溝の配置が、平行、格子状、千鳥状、円形状、多角形状、渦巻き状、放射状からなる群から選ばれるいずれか一つ以上であることを特徴とする請求項1〜4のいずれか一項に記載の吸音用合成樹脂発泡成形体。
- 前記薄幅溝を合成樹脂発泡体の表面と裏側に設けてなることを特徴とする請求項1〜5のいずれか一項に記載の吸音用合成樹脂発泡成形体。
- 前記合成樹脂発泡体の表面と裏側とで、薄幅溝の深さ、薄幅溝の幅、溝間ピッチのいずれか一つ以上が異であることを特徴とする請求項6に記載の吸音用合成樹脂発泡成形体。
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JP4393880B2 true JP4393880B2 (ja) | 2010-01-06 |
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JP2006130718A (ja) * | 2004-11-04 | 2006-05-25 | Kaneka Corp | 合成樹脂型内発泡成形用金型および該金型を用いて成形された合成樹脂型内発泡成形体 |
JP5509516B2 (ja) * | 2006-03-31 | 2014-06-04 | 大日本印刷株式会社 | 床材用化粧材 |
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