JP2005187658A - 樹脂組成物及びエレクトロニクス分野の搬送用治具 - Google Patents
樹脂組成物及びエレクトロニクス分野の搬送用治具 Download PDFInfo
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- JP2005187658A JP2005187658A JP2003431264A JP2003431264A JP2005187658A JP 2005187658 A JP2005187658 A JP 2005187658A JP 2003431264 A JP2003431264 A JP 2003431264A JP 2003431264 A JP2003431264 A JP 2003431264A JP 2005187658 A JP2005187658 A JP 2005187658A
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- thermoplastic polyester
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Abstract
【解決手段】(A)固有粘度が1.0以下の熱可塑性ポリエステル(ポリブチレンテレフタレート)100重量部と、(B)直径1nm〜1mm及び長さ1mm〜10mmを有し、かつ体積抵抗率が1Wcm未満の炭素繊維1〜30重量部とで樹脂組成物を構成する。この樹脂組成物は、(C)ポリオキシエチレン単位を有する化合物を実質的に含有しない。樹脂組成物は、さらに(C)芳香族ポリカーボネート及び(D)エステル交換反応阻止剤を含有してもよい。前記樹脂組成物で形成されたエレクトロニクス分野の搬送用治具は、表面抵抗率が1×1010W/□以下(縦100mm、横100mmの表面領域を、印加電圧500Vで測定)であり、制電特性に優れている。
【選択図】なし
Description
本発明の樹脂組成物は、熱可塑性ポリエステル(A)と、炭素繊維(B)とを含み、ポリオキシエチレン単位を有する化合物を実質的に含有しない。ポリオキシエチレン単位を有する化合物としては、例えば、ポリエチレングリコール系ポリエステルアミド、ポリエチレングリコール系ポリアミド共重合体、ポリエチレングリコール系ポリエステルエラストマー、ポリエチレングリコールメタクリレート共重合体、ポリ(エチレンオキシド/プロピレンオキシド)共重合体、ポリ(エピクロルヒドリン/エチレンオキシド)共重合体などが挙げられる。
熱可塑性ポリエステルは、ジカルボン酸成分とジオール成分との重縮合、オキシカルボン酸又はラクトンの重縮合、またはこれらの成分の重縮合などにより得られるホモポリエステル又はコポリエステルである。好ましい熱可塑性ポリエステルには、通常、飽和ポリエステル系樹脂、特に芳香族飽和ポリエステル系樹脂が含まれる。
炭素繊維は、焼成により得られる炭素繊維(例えば、ポリアクリロニトリル(PAN)系炭素繊維、フェノール系炭素繊維、ピッチ系炭素繊維など)であってもよいが、気相法で製造された気相法炭素繊維を使用するのが好ましい。気相法炭素繊維は、例えば、基板法、浮遊法などにより製造できる。前記基板法の詳細は、例えば、特開昭60−27700号公報などを参照でき、前記浮遊法の詳細については、特開昭62−78217号公報などを参照できる。なお、これらの方法で製造された炭素繊維には、2000℃以上の高温で処理された炭素繊維も含まれる。炭素繊維は単独で又は二種以上組み合わせて使用できる。
芳香族ポリカーボネート(C)としては、ジヒドロキシ化合物(ビスフェノール化合物などの二価フェノールなど)と、カーボネート前駆体(ホスゲン、ハロゲン化ギ酸エステル、ジフェニルカーボネートなどの炭酸エステルなど)との反応により得られる重合体が含まれる。
エステル交換反応阻止剤とは、エステル−カーボネート交換反応を阻止するための安定剤を意味する。前記阻止剤(D)としては、α−ヒドロキシ又はα−アミノ脂肪族酸誘導体、o−ヒドロキシ又はo−アミノ芳香族酸誘導体等であり、例えば、サリチル酸メチル、サリチル酸エチル、サリチル酸フェニル、サリチルアミド、グリシン、オキシコハク酸、マンデル酸等が挙げられる。これらの阻止剤は、単独で又は二種以上組み合わせて使用できる。これらの阻止剤のうち、特にオキシコハク酸が好ましい。
本発明には、前記樹脂組成物で形成された成形品も含まれる。前記樹脂組成物は、溶融混練し、押出成形、射出成形、圧縮成形、ブロー成形、真空成形、回転成形、ガスインジェクションモールディングなどの慣用の方法で成形してもよいが、通常、射出成形により成形することにより、成形品を製造できる。射出成形の条件は適当に選択でき、例えば、170〜280℃程度で樹脂組成物を溶融混錬し、射出成形機により、シリンダー温度170〜280℃程度の条件で射出成形してもよい。
表1に示す原料を、表1に示す割合で予め均一にドライブレンドした後、スクリュー径44mmのベント付き2軸押出機を用いて溶融混練(シリンダー温度180〜270℃、スクリュー回転数160rpm、吐出量40kg/h)し、ダイスから吐出するスレッドを、冷却後、切断して成形用ペレットを得た。
(A)ポリブチレンテレフタレート(PBT)
(A-1)ウィンテックポリマー(株)製、PBT1:TRE−DE2(IV:1.2)
(A-2)ウィンテックポリマー(株)製、PBT2:TRE−DM2(IV:0.9)
(A-3)ウィンテックポリマー(株)製、PBT3:TRE−D7B(IV:0.7)。
(B-1)カーボンファイバー(CF)(東邦レーヨン(株)製、HTA−C6−SR、体積抵抗率:1.5×10-3Ωcm、繊維径7μm、繊維長6mm)
(B-2)極細気相法炭素繊維(VGCF)(米国ハイピリオン・カタリシス社製、マイクログラファイトフィブリルBN1100、体積抵抗率:1×10-2Ωcm、繊維径15nm、繊維長10〜20μm)
(B-3)ケッチェンブラック(EC600JD(CB)、ライオン(株)社製、平均粒子径30nm)。
(D)エステル交換反応防止剤(安定剤)(東京化成(株)製、オキシコハク酸)。
(1)帯電防止性(抵抗率)の評価
試験片(縦100mm×横100mm、厚さ約3mm)を温度23℃、相対湿度50%の雰囲気下で24時間調湿した後、超絶縁計(アドバンテスト社製 R8340 ULTRAHIGHRESISTANCE METER)を用いて、環境温度23℃及び相対湿度50%の条件下で、電圧500Vを印加したとき、電極間(内径1.8cm及び外径3.0cmの二重リング電極を使用)に流れる電流を測定することにより、表面抵抗率を求め、帯電防止性の指標とした。
炭素繊維の体積抵抗率は、JIS−R−7601に準処して測定した。又この方法が採用できない場合は、100kg/cm2の圧粉体にして測定した。
JIS−K−7204に準処して、テーバー磨耗量及びテーバー磨耗面の算術平均粗さを求めた。なお、測定装置としては、ABRASER MODEL 503 STANDARD ABRASION TESTER(ABRASER社製)を使用し、所定の条件(リングCS17、加重1kg、1000回転)で、リングの軸に重りを付け加圧しながら成形品表面を回転させて、表面を削り、削れ性を評価した。
三次元測定機FJ604((株)三豊製作所製)を用い、金型寸法を基準にして成形品の樹脂の流れ方向、及びこの流れに対して垂直な方向における収縮率を測定した。そして、下記式に従って、異方性を評価した。なお、得られた値が0に近いほど、異方性が小さいことを意味している。
[(垂直方向における収縮率)/(樹脂の流れ方向における収縮率)]×100−100
実施例及び比較例の結果を表1に示す。なお、表1の混合比率の単位は重量部であり、表面抵抗率において、例えば、E+8などの「E+X」は、「×10X」(10のX乗倍)を意味する。
Claims (6)
- (A)固有粘度が1.0以下の熱可塑性ポリエステルと、(B)炭素繊維とを含み、ポリオキシエチレン単位を有する化合物を実質的に含有しない樹脂組成物であって、前記炭素繊維(B)が平均繊維径1nm〜1μm及び平均繊維長1μm〜10mmを有し、かつ体積抵抗率が1Ωcm未満の炭素繊維であり、前記熱可塑性ポリエステル(A)100重量部に対して、前記炭素繊維(B)を1〜30重量部の割合で含有する樹脂組成物。
- 熱可塑性ポリエステル(A)及び炭素繊維(B)が、それぞれ、ポリブチレンテレフタレート系樹脂及び気相法炭素繊維で構成され、さらに(C)芳香族ポリカーボネート及び(D)エステル交換反応阻止剤を含有する樹脂組成物であって、前記芳香族ポリカーボネート(C)及び阻止剤(D)の割合が、熱可塑性ポリエステル(A)100重量部に対して、それぞれ10〜40重量部及び0.02〜10重量部であり、前記阻止剤(D)が、実質的に金属塩を含有しない請求項1記載の樹脂組成物。
- 請求項1記載の樹脂組成物で形成されたエレクトロニクス分野の搬送用治具。
- 縦100mm及び横100mmの表面領域を、電圧500Vで印加して測定したとき、表面抵抗率が1×1010Ω/□以下である請求項3記載の搬送用治具。
- 表面において、テーバー摩耗量が30mg以下であり、テーバー摩耗面の算術平均粗さRaが1.0μm以上である請求項3記載の搬送用治具。
- ウェハーを保持するための溝を少なくとも一つ有するシリコンウェハーキャリアである請求項4記載の搬送用治具。
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Cited By (4)
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WO2008001708A1 (fr) * | 2006-06-26 | 2008-01-03 | Polyplastics Co., Ltd. | Composition de résine cristalline liquide |
WO2013090054A1 (en) * | 2011-12-16 | 2013-06-20 | Sabic Innovative Plastics Ip B.V. | Electrostatic dissipative composites |
WO2021218246A1 (zh) * | 2020-04-30 | 2021-11-04 | 上海锦湖日丽塑料有限公司 | 一种透明静电耗散pc树脂组合物及其制备方法 |
WO2023284311A1 (zh) * | 2021-07-12 | 2023-01-19 | 广州视源电子科技股份有限公司 | 一种高电性能pc/聚酯材料及其制备方法 |
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JPH09255913A (ja) * | 1996-03-26 | 1997-09-30 | Teijin Ltd | シリコンウェハーキャリア用のバーコード被覆材 |
JP2000044815A (ja) * | 1998-08-04 | 2000-02-15 | Teijin Ltd | 樹脂組成物及びそれからなるエレクトロニクス分野の搬送用冶具 |
JP2000248186A (ja) * | 1999-02-26 | 2000-09-12 | Teijin Ltd | 樹脂組成物およびそれからなるエレクトロニクス分野の搬送用冶具 |
WO2002045098A2 (en) * | 2000-11-30 | 2002-06-06 | General Electric Company | Conductive polyester/polycarbonate blends, methods for preparation thereof, and articles derived therefrom |
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JPH09255913A (ja) * | 1996-03-26 | 1997-09-30 | Teijin Ltd | シリコンウェハーキャリア用のバーコード被覆材 |
JP2000044815A (ja) * | 1998-08-04 | 2000-02-15 | Teijin Ltd | 樹脂組成物及びそれからなるエレクトロニクス分野の搬送用冶具 |
JP2000248186A (ja) * | 1999-02-26 | 2000-09-12 | Teijin Ltd | 樹脂組成物およびそれからなるエレクトロニクス分野の搬送用冶具 |
WO2002045098A2 (en) * | 2000-11-30 | 2002-06-06 | General Electric Company | Conductive polyester/polycarbonate blends, methods for preparation thereof, and articles derived therefrom |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008001708A1 (fr) * | 2006-06-26 | 2008-01-03 | Polyplastics Co., Ltd. | Composition de résine cristalline liquide |
JP2008001848A (ja) * | 2006-06-26 | 2008-01-10 | Polyplastics Co | 液晶性樹脂組成物 |
WO2013090054A1 (en) * | 2011-12-16 | 2013-06-20 | Sabic Innovative Plastics Ip B.V. | Electrostatic dissipative composites |
US9125310B2 (en) | 2011-12-16 | 2015-09-01 | Sabic Global Technologies B.V. | Electrostatic dissipative composites |
WO2021218246A1 (zh) * | 2020-04-30 | 2021-11-04 | 上海锦湖日丽塑料有限公司 | 一种透明静电耗散pc树脂组合物及其制备方法 |
US11746231B2 (en) | 2020-04-30 | 2023-09-05 | Shanghai Kumhosunny Plastics Co., Ltd. | Transparent static-dissipative polycarbonate resin composition and preparation method thereof |
WO2023284311A1 (zh) * | 2021-07-12 | 2023-01-19 | 广州视源电子科技股份有限公司 | 一种高电性能pc/聚酯材料及其制备方法 |
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