JP7124833B2 - 樹脂部材、シート、蓄熱材、及び樹脂部材の製造方法 - Google Patents
樹脂部材、シート、蓄熱材、及び樹脂部材の製造方法 Download PDFInfo
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Description
以下に示すエチレンと炭素数が3以上のオレフィンとの共重合体、鎖状の飽和炭化水素化合物、炭素繊維、並びにカルボン酸及びカルボン酸金属塩を用いて、表1に示す組成の樹脂部材を作製した。具体的には、飽和炭化水素化合物を融点以上に加温した状態で、エチレンと炭素数が3以上のオレフィンとの共重合体を加えて均一に混合した。その後、カルボン酸及びカルボン酸金属塩を添加して、更に均一に混合した。続いて、炭素繊維を加えて、加圧加熱プレス(上板80℃/下板40℃、加圧140kPa)で混練することにより樹脂部材を得た。得られた樹脂部材を加圧加熱プレス(上下熱板80℃、加圧1MPa)することにより、170×60×1mmのシート状の樹脂部材を得た。
A-1:エチレンとオクテンとの共重合体(ダウ・ケミカル日本(株)製、製品名「ENGAGE8150」)
(鎖状飽和炭化水素化合物)
B-1:n-ヘキサデカン(融点:18℃)
(炭素繊維)
C-1:GRANOC XN-90C-06S(日本グラファイトファイバー(株)製、アスペクト比600(繊維径10μm、繊維長6mm)、熱伝導率500W/mK)
C-2:ラヒーマ R-A301(帝人(株)製、アスペクト比25(繊維径8μm、繊維長0.2mm)、熱伝導率550W/mK)
C-3:ドナカーボ S201(大阪ガスケミカル(株)製、アスペクト比833(繊維径18μm、繊維長15mm程度に切断して使用)、熱伝導率3W/mK)
C-4:GRANOC XN-100-03Z(日本グラファイトファイバー(株)製、アスペクト比300(繊維径10μm、繊維長3mm)、熱伝導率900W/mK)
C-5:GRANOC XN-100-06Z(日本グラファイトファイバー(株)製、アスペクト比600(繊維径10μm、繊維長6mm)、熱伝導率900W/mK)
(カルボン酸又はカルボン酸金属塩)
D-1:2-エチルヘキサン酸アルミニウム
D-2:オレイン酸
炭素繊維に代えて下記の炭素材料C-6を用いた以外は、実施例1と同様にして樹脂部材を得た。
C-6:微粉黒鉛(昭和電工(株)製、アスペクト比20未満、微粉径7μm以下)
炭素繊維を用いなかった以外は、実施例1と同様にして樹脂部材を得た。
各樹脂部材の融点付近において、液体の滲みだしの有無を目視及び触感で判断した。
QTM-500(京都電子工業(株)製)を用い、また、プローブとしてPD-11Nを用いて、シート面内の熱伝導率を測定した。
DSC-8500((株)パーキンエルマー製)を用いて、10℃/分の昇温過程における融解のピーク温度及び凝固のピーク温度から融点及び凝固点をそれぞれ求め、それぞれの面積から融解熱及び凝固熱を算出した。なお、融解熱が大きいほど蓄熱容量が大きいことを意味する。
Claims (14)
- エチレンと炭素数が3以上のオレフィンとの共重合体と、
0~100℃の範囲内に融点を有する飽和炭化水素化合物と、
炭素繊維と、
を含む樹脂部材。 - 前記炭素繊維の熱伝導率が300W/mK以上である、請求項1に記載の樹脂部材。
- 前記オレフィンの炭素数が3~8である、請求項1又は2に記載の樹脂部材。
- 前記飽和炭化水素化合物の融点が50℃未満であり、前記オレフィンの炭素数が8である、請求項1~3のいずれか一項に記載の樹脂部材。
- 前記炭素繊維のアスペクト比が100~1000である、請求項1~4のいずれか一項に記載の樹脂部材。
- 前記炭素繊維の含有量が、前記樹脂部材全量基準で15質量%以上である、請求項1~5のいずれか一項に記載の樹脂部材。
- ゲル化剤を更に含む、請求項1~6のいずれか一項に記載の樹脂部材。
- カルボン酸及びカルボン酸金属塩からなる群より選ばれる少なくとも1種を更に含む、請求項1~6のいずれか一項に記載の樹脂部材。
- 請求項1~8のいずれか一項に記載の樹脂部材からなる樹脂層を備える、シート。
- 前記樹脂層の熱伝導率が1W/mK以上である、請求項9に記載のシート。
- 前記樹脂層の融解熱が90J/g以上である、請求項9又は10に記載のシート。
- 請求項1~8のいずれか一項に記載の樹脂部材を備える、蓄熱材。
- エチレンと炭素数が3以上のオレフィンとの共重合体と、0~100℃の範囲内に融点を有する飽和炭化水素化合物と、炭素繊維と、を含む組成物を加熱溶融して成形する工程を備える、樹脂部材の製造方法。
- 前記工程において、射出成形、圧縮成形又はトランスファー成形により前記組成物を成形する、請求項13に記載の樹脂部材の製造方法。
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