JP2008018581A - 熱可塑性樹脂組成物の製造方法 - Google Patents
熱可塑性樹脂組成物の製造方法 Download PDFInfo
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- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
【解決手段】二軸スクリュ押出機E1 は、シリンダ1の供給口6側からダイ8側へ向けて順次、可塑化部A、混練部B、減圧ベント部Cを備えている。ポリマーアロイ、ポリマーブレンド、ポリマーとフィラーの混合物のうちのいずれかである熱可塑性樹脂組成物の主材料および副材料を供給口6より定量供給して可塑化部Aにおいて溶融したのち、混練部Bにおいて注入口9を介して二酸化炭素の液体を注入し、シリンダ内圧力を10MPa以上20MPa未満の高圧にして混練する。ついで減圧ベント部Cにおいてベント口13を介して真空吸引することにより急速減圧を行って二酸化炭素を脱気したのち、ダイ8より押し出してストランドカッタ14でペレットに切断する。
【選択図】図1
Description
(1)得られたストランドを流れと垂直方向(流れと垂直方向)および水平方向(流れ方向)に切断し、ミクロトームを用いて平滑面を作成する。
(2)クロロホルムに試験片を浸漬し、ポリスチレンを溶出させる。
(3)洗浄・乾燥後、レーザ顕微鏡(キーエンス VK9510)で表面を観察し、スチレン脱落後の痕跡から分散状態を評価した。
(1)得られたストランドを流れと垂直方向(流れと垂直方向)および水平方向(流れ方向)に切断し、ミクロトームを用いて平滑面を作成する。
(2)四酸化ルテニウム0.5%水溶液に1晩含浸させた後、ミクロトームを用いて薄片を作成後、透過型電子顕微鏡(日本電子 J1200EX)を用いて観察を行った。
(1)射出成形機(日本製鋼所製 J110AD)を用い、試験片金型により測定用試験片を成形する。
(2)機械切削によりノッチ加工した試験片を用い、JIS K7110に準拠して衝撃試験を行った。なお、その際試験片の温度は−30℃とした。
2、32a、32b スクリュ
3、33a、33b 回転駆動機構
4、34 ホッパ
5、35 フィーダ
6、36、52 供給口
7a、37a 上流側シールリング
7b、37b 下流側シールリング
8、38 ダイ
9、39 注入口
10、40 定量供給装置
11、41 注入管路
12、42 タンク
13、43 ベント口
14、44 ストランドカッタ
15、45 ストランドバス
16、46 脱気管路
17、47 トラップ
18、48 真空ポンプ
Claims (2)
- ポリマーアロイ、ポリマーブレンド、ポリマーとフィラーの混合物のうちのいずれかである熱可塑性樹脂組成物の製造方法において、
シリンダおよび前記シリンダ内に回転自在に配設された2本のスクリュを有し、前記シリンダに設けられた上流の供給口から下流のダイヘ向かって順次、可塑化部、混練部、減圧ベント部を備えた二軸スクリュ押出機を用い、
前記供給口より前記熱可塑性樹脂組成物の主材料および副材料を定量供給して前記可塑化部で溶融したのち、前記混練部において二酸化炭素の液体を注入してシリンダ内圧力を10MPa以上20MPa未満の高圧にして混練し、ついで前記減圧ベント部においてベント口を介して真空吸引することにより急速減圧を行って前記二酸化炭素を脱気除去したのち前記ダイより押し出すこと、を特徴とする熱可塑性樹脂組成物の製造方法。 - 前記減圧ベント部における急速減圧は、3MPa/sec以上10GPa/sec未満の圧力勾配で減圧すること、を特徴とする請求項1記載の熱可塑性樹脂組成物の製造方法。
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JP2021037689A (ja) * | 2019-09-03 | 2021-03-11 | 株式会社日本製鋼所 | 二軸混練押出機及びベントアダプター |
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