JP6520707B2 - 複合摺動材およびoa機器用耐熱性複合摺動材 - Google Patents
複合摺動材およびoa機器用耐熱性複合摺動材 Download PDFInfo
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- JP6520707B2 JP6520707B2 JP2015515300A JP2015515300A JP6520707B2 JP 6520707 B2 JP6520707 B2 JP 6520707B2 JP 2015515300 A JP2015515300 A JP 2015515300A JP 2015515300 A JP2015515300 A JP 2015515300A JP 6520707 B2 JP6520707 B2 JP 6520707B2
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- Reinforced Plastic Materials (AREA)
Description
平板状の複合摺動材を、織物のヨコ方向およびタテ方向にそれぞれカットしたタテ断面(複合摺動材を繊維織物と樹脂部材およびその複合界面を横断するようにカットした断面)において、樹脂部材と織物裏面層に位置する耐熱性繊維のタテ糸断面近傍およびヨコ糸断面近傍が観察できる試験体を準備し、走査型電子顕微鏡(SEM)で撮影する。
JIS L1021−9:2007に規定されたB法に準じて計測する。試験体は、複合摺動材の平板から50mm×150mm×3mmのサイズに切り出した。あらかじめ長さ150mmのうちの80mm分の繊維織物を樹脂部材からはく離させたあと、はく離させた繊維織物の端部と樹脂部材それぞれを引張試験機の上下のつかみで挟む。
JIS K7218:1986(プラスチックの滑り摩耗試験方法)A法に準じて求める。リング摩耗試験機は、オリエンテック製MODEL:EFM−III−ENを用い、摩擦荷重10MPa、摩擦速度10mm/秒にて試験を行い摩擦摺動距離100mまでの摺動トルクを測定する。
繊維織物の表面層を構成するフッ素樹脂繊維として440dtex、60フィラメント、撚糸数300t/mのポリテトラフルオロエチレン(PTFE)繊維をタテ糸、ヨコ糸に用い、織物の裏面層を構成する熱可塑性樹脂繊維として220dtex、50フィラメント、撚糸数130t/mのポリフェニレンサルファイド(PPS)繊維をタテ糸、ヨコ糸に用い、それぞれの織り密度がタテ70+70(フッ素樹脂繊維織物タテ+PPS繊維織物タテ(本/2.54cm))、ヨコ60+60(フッ素樹脂繊維織物ヨコ+PPS繊維織物ヨコ(本/2.54cm))、フッ素樹脂繊維織物とPPS繊維織物の絡み合いはフッ素樹脂繊維織物とPPS繊維織物のタテ糸を絡み糸として結合の頻度が0.2となるように、レピア織機にて2重平織物を製作した。その後80℃の精練槽にて精練を行い、200℃でセットした。
射出成形条件において、射出速度を5mm/secに変更する以外は、実施例1と同様とした。
射出成形条件において、射出速度を10mm/secに変更する以外は、実施例1と同様とした。
射出成形条件において、射出速度を30mm/secに変更する以外は、実施例1と同様とした。
実施例1における織物のヨコ糸織り密度がヨコ60+60(フッ素樹脂繊維織物ヨコ+PPS繊維織物ヨコ(本/2.54cm))であるのに対し、ヨコ80+80(フッ素樹脂繊維織物ヨコ+PPS繊維織物ヨコ(本/2.54cm))に変更し、それ以外の製織条件は実施例1と同様にして織物を得た。これを実施例1と同様の射出成形条件により、複合摺動材を得た。
樹脂部材として射出成形に供する熱可塑性樹脂を、液晶ポリエステル樹脂に変更し、かつ射出成形条件においてシリンダ設定温度を330℃、射出圧力100MPa、に変更する以外は、実施例1と同様とした。
織物裏面層を構成する熱可塑性樹脂繊維として220dtex、48フィラメント、無撚りのポリエチレンテレフタレート(PET)繊維をタテ糸、ヨコ糸に用いるよう変更し、それ以外の製織条件は実施例1と同様として繊維織物を得た。さらに、樹脂部材として射出成形に供する熱可塑性樹脂をポリブチレンテレフタレート(PBT)樹脂に変更し、かつ射出成形条件において、シリンダ設定温度を260℃に変更する以外は、実施例1と同様として複合摺動材を得た。
射出成形条件において、射出速度を5mm/secに変更する以外は、比較例2と同様とした。
2・・・裏面層
3・・・繊維織物
4・・・樹脂部材
5・・・フッ素樹脂繊維
6・・・耐熱性繊維
7・・・耐熱性繊維
8・・・耐熱性繊維
Claims (6)
- 繊維織物と樹脂部材とを複合させた複合摺動材であって、前記繊維織物は摺動面となる表面層と、樹脂部材と接着されている裏面層とを有した多層織物であり、前記表面層は主としてフッ素樹脂繊維で構成され、前記裏面層は主として耐熱性繊維で構成され、
前記複合摺動材の繊維織物と樹脂部材およびその複合界面を横断する断面を観察したとき、該断面において、他の繊維を介することなく前記樹脂部材と隣接する位置にある1本の耐熱性繊維Aを構成する全単糸本数に対する、前記樹脂部材を構成する樹脂および隣接単糸のいずれとも密接していない前記耐熱性繊維A中の単糸本数の比率をR1としたとき、R1が0〜70%の範囲内である複合摺動材。 - 前記複合摺動材の繊維織物と樹脂部材およびその複合界面を横断する断面を観察したとき、該断面における前記耐熱性繊維のうち、直交する繊維を介することで前記樹脂部材と隣接していない位置にある、1本の耐熱性繊維Bを構成する全単糸本数に対する、前記樹脂部材から連続する樹脂および隣接単糸のいずれとも密接していない前記耐熱性繊維B中の単糸本数の比率をR2としたとき、R2が10〜100%の範囲内であり、かつR2がR1よりも大きい請求項1に記載の複合摺動材。
- 前記樹脂部材が、耐熱性を有する熱可塑性樹脂からなることを特徴とする請求項1または2に記載の複合摺動材。
- 前記耐熱性繊維に使用される樹脂と樹脂部材に使用される樹脂とが、同一素材の熱可塑性樹脂からなるものである請求項1から3のいずれかに記載の複合摺動材。
- 前記熱可塑性樹脂がポリフェニレンサルファイド樹脂または液晶ポリエステル樹脂であることを特徴とする請求項3または4に記載の複合摺動材。
- 上記請求項1から5のいずれかに記載の複合摺動材を、OA機器用途に用いるOA機器用耐熱性複合摺動材。
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