JP2006240286A - 熱可塑性樹脂発泡成形体 - Google Patents
熱可塑性樹脂発泡成形体 Download PDFInfo
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- JP2006240286A JP2006240286A JP2005292800A JP2005292800A JP2006240286A JP 2006240286 A JP2006240286 A JP 2006240286A JP 2005292800 A JP2005292800 A JP 2005292800A JP 2005292800 A JP2005292800 A JP 2005292800A JP 2006240286 A JP2006240286 A JP 2006240286A
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Abstract
【解決手段】 熱可塑性樹脂型内発泡成形体であって、成形体内の空隙率が不均一、好ましくは、成形体内の空隙率が10%未満の部位と、空隙率10%以上60%以下の部位が略区画状に存在することを特徴とする熱可塑性樹脂発泡成形体。
【選択図】 なし
Description
(予備発泡粒子Aの製造)
基材樹脂として、MI:4.5g/10分、融点:144℃、エチレン含量:2.8%、ブテン含量:1.3%を用い、セル造核剤としてタルク300ppmを添加して押出機内で溶融混練した後、円形ダイよりストランド状に押出し、水冷後、カッターで切断し、一粒の重量が1.8mg/粒、該円柱形状で、L/Dが6.3である樹脂粒子を得た。
(予備発泡粒子Bの製造)
予備発泡粒子Aを製造したのと同じ樹脂粒子を使用し、オートクレーブ内容物を130℃の発泡温度まで加熱してイソブタンを追加圧入して2.4MPaの発泡圧力まで昇圧した以外は、予備発泡粒子Aと同様にして、L/D:2.2、β/(α+β):0.70、嵩密度:0.019g/cm3である、発泡粒子Bを得た。
(予備発泡粒子C)
市販されている(株)カネカ製のDBS45(45倍品)(以下、発泡粒子C(L/D:1.05、β/(α+β):0.25)を使用した
(実施例1)
予備発泡粒子Aと予備発泡粒子Cを使用した。300×400×50mmのブロック形状の金型を使用し、予備発泡粒子に空気加圧処理により空気を含浸させ、予備発泡粒子Aを絶対圧力で0.13MPa、予備発泡粒子Cを0.21MPaの内圧を付与した。
実施例1において使用する金型を、300×400×50mmのブロック形状で、且つ略外周端部50mmと内部を櫛部材で区画化し、櫛部はステンレスバネ鋼を素材とし、櫛長さ49mm、櫛径φ2.5mm、櫛間隔2.5mmのものを用いた以外は実施例1と同様にして空隙率の確保と形状保持性を両立させた発泡成形体を得た。
実施例2において、予備発泡粒子Cを予備発泡粒子Bに代えた以外は実施例2と同様にして、空隙率の確保と形状保持性を両立させた発泡成形体を得た。
実施例1で用いた発泡粒子Aに、空気加圧処理により空気を含浸させ、絶対圧力で0.13MPaの内圧を付与した予備発泡粒子を得た。これを300×400×50mmのブロック形状金型に充填し、ゲージ圧0.22MPaの蒸気で加熱、水冷60秒を行い、発泡粒子Aのみで形成された発泡体を得た。これを常温で1時間放置し、その後75℃、24時間の乾燥、24時間の常温養生を行った。
Claims (3)
- 熱可塑性樹脂型内発泡成形体であって、成形体内の空隙率が不均一であることを特徴とする熱可塑性樹脂発泡成形体。
- 熱可塑性樹脂型内発泡成形体であって、成形体内の空隙率が10%未満の部位と、空隙率10%以上60%以下の部位が略区画状に存在することを特徴とする請求項1記載の熱可塑性樹脂発泡成形体。
- 成形体外周部を空隙率10%未満とし、それ以外を空隙率10%以上60%以下で構成したことを特徴とする請求項2に記載の熱可塑性樹脂発泡成形体。
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2022091750A1 (ja) | 2020-10-26 | 2022-05-05 | 株式会社ジェイエスピー | 積層体の製造方法 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58183226A (ja) * | 1982-04-20 | 1983-10-26 | Kanegafuchi Chem Ind Co Ltd | 異種密度を有する成形体の成形法および成形装置 |
JPS6120727A (ja) * | 1984-07-09 | 1986-01-29 | Nissan Motor Co Ltd | 発泡成形方法 |
JPS6135240A (ja) * | 1984-07-27 | 1986-02-19 | 新東工業株式会社 | フルモ−ルド用発泡成形体 |
JPH03224727A (ja) * | 1990-01-31 | 1991-10-03 | Jsp Corp | ポリオレフィン系樹脂発泡成型体及びその製造方法 |
JPH07137068A (ja) * | 1993-11-16 | 1995-05-30 | Jsp Corp | 連通した空隙を有する重合体発泡成型体 |
JP2000000894A (ja) * | 1998-06-16 | 2000-01-07 | Mitsubishi Kagaku Form Plastic Kk | 熱可塑性樹脂発泡成形体の製造方法 |
JP2001328134A (ja) * | 2000-05-24 | 2001-11-27 | Kanegafuchi Chem Ind Co Ltd | 熱可塑性合成樹脂の型内発泡成形方法及び装置並びに型内発泡成形品 |
JP2002242428A (ja) * | 2001-02-16 | 2002-08-28 | Nkk Corp | プラスチック複合パネルおよびその製造方法 |
-
2005
- 2005-10-05 JP JP2005292800A patent/JP4984482B2/ja active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58183226A (ja) * | 1982-04-20 | 1983-10-26 | Kanegafuchi Chem Ind Co Ltd | 異種密度を有する成形体の成形法および成形装置 |
JPS6120727A (ja) * | 1984-07-09 | 1986-01-29 | Nissan Motor Co Ltd | 発泡成形方法 |
JPS6135240A (ja) * | 1984-07-27 | 1986-02-19 | 新東工業株式会社 | フルモ−ルド用発泡成形体 |
JPH03224727A (ja) * | 1990-01-31 | 1991-10-03 | Jsp Corp | ポリオレフィン系樹脂発泡成型体及びその製造方法 |
JPH07137068A (ja) * | 1993-11-16 | 1995-05-30 | Jsp Corp | 連通した空隙を有する重合体発泡成型体 |
JP2000000894A (ja) * | 1998-06-16 | 2000-01-07 | Mitsubishi Kagaku Form Plastic Kk | 熱可塑性樹脂発泡成形体の製造方法 |
JP2001328134A (ja) * | 2000-05-24 | 2001-11-27 | Kanegafuchi Chem Ind Co Ltd | 熱可塑性合成樹脂の型内発泡成形方法及び装置並びに型内発泡成形品 |
JP2002242428A (ja) * | 2001-02-16 | 2002-08-28 | Nkk Corp | プラスチック複合パネルおよびその製造方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022091750A1 (ja) | 2020-10-26 | 2022-05-05 | 株式会社ジェイエスピー | 積層体の製造方法 |
JP2022070043A (ja) * | 2020-10-26 | 2022-05-12 | 株式会社ジェイエスピー | 積層体の製造方法 |
JP7096873B2 (ja) | 2020-10-26 | 2022-07-06 | 株式会社ジェイエスピー | 積層体の製造方法 |
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