JP4085125B1 - 超微粉体を樹脂に混練分散する方法および混練装置 - Google Patents
超微粉体を樹脂に混練分散する方法および混練装置 Download PDFInfo
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- JP4085125B1 JP4085125B1 JP2007160519A JP2007160519A JP4085125B1 JP 4085125 B1 JP4085125 B1 JP 4085125B1 JP 2007160519 A JP2007160519 A JP 2007160519A JP 2007160519 A JP2007160519 A JP 2007160519A JP 4085125 B1 JP4085125 B1 JP 4085125B1
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Disintegrating Or Milling (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Accessories For Mixers (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
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Abstract
【解決手段】挿入スクリュー22の周りで超微粉体Uおよび樹脂Gの混合物G0を加熱する原料挿入工程と、樹脂Gが溶融する樹脂溶融温度Tm〜Tsにまで加熱された混合物G0中で超微粉体Uの二次粒子を分散させる液相混練分散工程と、混合物G0中から気化した気体を脱気する脱気工程と、樹脂Gが固相状態を保つ樹脂熱変形温度Td近辺の温度に冷却して混合物G0に剪断力を加え、超微粉体Uの二次粒子を脆性粒子として解砕する固相混練分散工程と、再び樹脂Gが溶融する樹脂溶融温度Tsより若干低めの温度にまで加熱して再度液相混練処理を施す再液相混練工程と、機能性複合樹脂G1を押し出す押出工程と、機能性複合樹脂G1を丸紐状の製品に成形する成形工程とを備える。
【選択図】図1
Description
れ、ここでファン・デル・ワールス力で凝集した超微粒子の二次粒子の結合を解砕するための手段として、液相混練分散工程において未分散の二次粒子が分散系の脆性部となっている部分に剪断力を作用させることが必要になる、そこで樹脂の結合力を超微粒子の二次粒子の結合力以上になるように温度を下げて樹脂の動粘度を例えば1.5×106Pa・sec以上になるように設定し、この状態で原料に固相剪断分散を施す。
に、本実施形態においては、装置本体20は、超微粉体Uと樹脂Gとの混合物G0に対する処理の状況に応じて、上流側(図1における右側)から下流側に向けて原料挿入工程F、混練脱気工程K、押出工程Mおよび成形工程Dに対応する部分がそれぞれ設けられている。
リンダ21に比べて軸心方向の長さ寸法が長尺に設定され、その上部には上下方向に延びた脱気通路214aが設けられているとともに、当該脱気通路214a内から外部に向かって開放され通気孔214bが開口され、脱気工程Vで脱気された気体は、脱気通路214aを通り通気孔214bから外部へ導出されるようになされている。本実施形態においては、脱気工程V内を減圧環境にして効率よく脱気されるようになされている。
物G0に大きな剪断力が作用することはなく、超微粉体Uは二次粒子のままで樹脂G内に分散される。
only memory)74とを備えている。
練工程K3に対応する部分ついては、精密な温度管理が必要なことから、制御装置70による制御が行われる。この制御のために、第二〜第五温度センサ82〜85からの温度検出信号は、逐一CPU71に入力され、CPU71は、この検出信号に基づく制御信号を電源装置99および各制御弁61a〜64aへ出力し、これによる第二〜第五ジャケット92〜95への電力供給量の増減と、制御弁61a〜64aの開閉とによる開度の調節で液相混練分散工程K1、固相剪断分散工程K2、脱気工程Vおよび再液相混練工程K3の温度を精密に制御するようになされている。
1aに向けて弁の開度を大きくする信号を出力する。これによる冷媒の流量の増加によって液相混練分散工程K1における冷熱媒体流通路27,28を介した混合物G0への冷媒の伝熱量が増大し、液相混練分散工程K1の温度は第一温度T1に向けて低下することになる。
解砕することが困難であり、超微粉体Uを一粒一粒の粒子単位で(すなわち、一次粒子の状態で)樹脂G中に分散させることができず、従って、従来法では高品質の機能性樹脂を製造することができなかったのであるが、本発明では、従来のこのような不都合が解消され、粒径が0.1μmより小さな超微粉体Uであってもそれを粒子単位で樹脂G中に容易にかつ均一に分散させることが可能になり、高品質のナノコンポジットを製造することができる。
のために電気バンドヒーター90を採用することに限定されるものではなく、加熱蒸気を通すスチームジャケットや、加熱オイルを通すオイルジャケット等の加熱媒体を熱源として利用するものを採用してもよい。
の駆動による各切定量フィーダー32,34の周回で有機クレイおよびMAH−PPの双方を装置本体20へ供給し、当該装置本体20の駆動でMAH−PPと有機クレイとの混合物に剪断分散処理を含む混練捏和処理を施し、実施例および比較例それぞれの有機クレイナノコンポジットの製造を行った。MAH−PPに対する有機クレイの添加割合は、いずれも実クレイ量を3.0wt%とした。製品である有機クレイナノコンポジットの押出工程Mの成形工程Dからの外部への吐出量は、実施例および比較例ともに18kg/hに設定した。
80℃に、固相剪断分散工程K2が135℃に、再液相混練工程K3が170℃に、押出工程Mおよび成形工程Dがそれぞれ200℃に設定されている。
も高く、グラフト率が増加していくに従って低下している。
21 シリンダ 211〜220 第一〜第十シリンダ
214a 脱気通路 214b 通気孔
22 挿入スクリュー
221〜229 第一〜第九スクリュー
22a 挿入スクリュー 22b 螺条
23 回転円盤 231〜240 第一〜第十回転円盤
24 固定円盤 241〜249 第一〜第9固定円盤
25 挿入シリンダ 26 駆動装置
27 第一冷熱媒体流通路 28 第二冷熱媒体流通路
29 タイロッド 30 原料供給部
31 超微粉体ホッパー
32 超微粉体定量フィーダー
32a 超微粉体側駆動モータ
33 樹脂ホッパー 34 樹脂定量フィーダ
34a 樹脂側駆動モータ 35 中継筒
36 原料投入ホッパー 37a ロードセル
37b ローカル制御器 38a ロードセル
38b ローカル制御器 40 製品排出部
41 押出シリンダ 41a フランジ
42 ダイ部材
42a 成形ダイス 43 押出スクリュー
60 冷媒供給装置(温度調節手段)
61 第一往管路 61a 第一制御弁
62 第二往管路 62a 第二制御弁
63 第三往管路 63a 第三制御弁
64 第四往管路 64a 第四制御弁
65 復管路 66 熱交換器
70 制御装置 71 CPU
72 入出力装置 81〜87 第一〜第七温度センサ
90 電気バンドヒーター(温度調節手段)
91〜97 第一〜第七電気バンドヒーター
99 電源装置 G 樹脂
U 超微粉体 G0 混合物(原料)
G1 機能性複合樹脂 F 原料挿入工程
K 混練脱気工程 K1 液相混練分散工程
V 脱気工程 K2 固相剪断分散工程
K3 再液相混練工程 M 押出工程
D 成形工程 T1〜T7 第一〜第七温度
Claims (4)
- 一本の回転軸の周りに超微粉体と樹脂とが装填されるシリンダと、このシリンダに同心で内装されるスクリューと、このスクリューに同心で一体回転可能に取り付けられる複数の回転円盤と、この回転円盤の側面に対向するように同心でシリンダに装着される複数の固定円盤とが備えられてなる混練装置を用いて超微粉体と樹脂とを含む原料を下流側に移動させながら前記原料に混練分散を施す混練方法であって、
前記シリンダ内で直列に配設された前記回転円盤と前記固定円盤との所定数ずつの組み合わせにより、前記シリンダ内に上流側から下流側に向けて向かわせて加熱するべく、一本の回転軸の周りに前記原料を挿入する原料挿入工程と、
樹脂が溶融する温度にまで加熱された原料を樹脂の液相状態で混練して超微粉体を樹脂中に分散させる液相混練分散工程と、
液相状態で混練された原料中から発生する気体を脱気する脱気工程と、
樹脂が固相状態を保つ温度に冷却して前記原料に剪断力を加えることにより原料中の超微粉体の二次粒子を分散系の脆性粒子にして解砕する固相剪断分散工程と、
再び樹脂が溶融する温度にまで加熱して再度液相混練処理を施す再液相混練工程と、
再度液相混練処理が施されることにより得られた製品を押し出す押出工程とを順次設定するとともに、
前記液相混練分散工程と、前記固相剪断分散工程との間に前記脱気工程を介設したことを特徴とする超微粉体を樹脂に混練分散する方法。 - 前記脱気工程は、減圧環境下で行うことを特徴とする請求項1記載の超微粉体を樹脂に混練分散する方法。
- 前記固相剪断分散工程では、樹脂の温度が熱変形温度近傍の温度に設定されるとともに、樹脂の動粘度が1.5×106Pa・sec以上に設定することにより超微粉体の二次粒子を分散系の脆性粒子にして解砕することを特徴とする請求項1または2記載の超微粉体を樹脂に混練分散する方法。
- 超微粉体と樹脂とを含む原料を下流側に移動させながら原料を混練分散する混練装置であって、一本の回転軸の周りに超微粉体と樹脂とが装填されるシリンダと、このシリンダに同心で内装されるスクリューと、このスクリューに同心で一体回転可能に取り付けられる複数の回転円盤と、この回転円盤の側面に対向するように同心でシリンダに装着される複数の固定円盤とが備えられてなる超微粉体を樹脂に混練分散する混練装置であって、
前記シリンダ内で直列に配設された前記回転円盤と前記固定円盤との所定数ずつの組み合わせにより、前記シリンダ内に上流側から下流側に向けて、前記原料の樹脂を溶融温度にして液相状態で混練分散させる部分と、
樹脂が固相状態を保つ温度に冷却して原料中の超微粉体の二次粒子を系の脆性粒子にして前記原料に剪断力を加えることにより原料中の超微粉体の二次粒子を解砕して分散する固相剪断分散を行う部分と、
再び樹脂を溶融する温度にまで加熱して再度液相混練処理を施す部分と、
再度液相混練処理が施されることにより得られた製品を押し出す部分とが備えられ、
前記樹脂を溶融温度にして液相状態で混練分散させる部分と、前記原料中の超微粉体の二次粒子を解砕して分散する固相剪断分散を行う部分との間に、液相混練分散された原料中から発生する気体を脱気する脱気する部分が設けられていることを特徴とする超微粉体を樹脂に混練分散する混練装置。
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| EP2770013A4 (en) * | 2011-10-18 | 2015-04-01 | Sekisui Chemical Co Ltd | METHOD FOR PRODUCING A RESIN COMPOSITE MATERIAL AND RESIN COMPOSITE MATERIAL |
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| WO2022233034A1 (zh) * | 2021-05-07 | 2022-11-10 | 德州学院 | 利用煤气化渣制备涂料用复合颜填料的方法 |
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