JP2020535032A - 超臨界流体により金型を要することなく立体構造発泡製品を製造する方法 - Google Patents
超臨界流体により金型を要することなく立体構造発泡製品を製造する方法 Download PDFInfo
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- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
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- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- B29C44/34—Auxiliary operations
- B29C44/3469—Cell or pore nucleation
- B29C44/348—Cell or pore nucleation by regulating the temperature and/or the pressure, e.g. suppression of foaming until the pressure is rapidly decreased
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C44/60—Measuring, controlling or regulating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J2203/00—Foams characterized by the expanding agent
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Abstract
Description
2 液体N2タンク
3 N2増圧ステーション
4 液体CO2タンク
5 CO2増圧ステーション
6 吸気弁
7 立体発泡システム
8 圧力制御装置
9 温度制御装置
10 圧力開放装置
11 消音器
12 排気弁
13 予熱システム
14 温度制御装置
15 加熱循環装置
Claims (8)
- 超臨界流体により金型を要することなくポリマーの立体構造発泡製品を製造する方法であって、超臨界流体搬送システム、立体発泡システム、予熱システムを含み、超臨界流体搬送システムは、超臨界CO2又は超臨界N2搬送システムか、又は、N2/CO2混合ガス搬送システムであり、立体発泡システムは、立体発泡容器、温度制御装置、圧力制御装置、圧力開放装置を含み、前記超臨界流体搬送システムは立体発泡システムに接続され、前記予熱システムは、予熱容器、加熱循環装置、温度制御装置を含み、
一段階成形法を用い、高温且つ中圧の超臨界流体でポリマーを膨潤及び浸漬することにより、自由に、金型を要することなく、且つ立体的に、減圧によって直に立体発泡容器で発泡成形し、具体的な操作手順として、
ポリマー原料を加圧成形して発泡プリフォームを取得し、発泡プリフォームを予熱システム内で予熱して予熱温度まで昇温してから、立体発泡容器に発泡プリフォームを投入して立体発泡容器の密封カバーを閉止し、吸気弁を開放して超臨界流体を導入してから、目標の温度及び圧力となるよう調節すると、超臨界流体がポリマーを30〜120min膨潤させながら拡散し、続いて、圧力開放装置を開放することで減圧により発泡させれば、製品形状、サイズ精度、気泡が緻密であり、且つ製品密度を制御可能なポリマーの微細孔発泡製品が得られることを特徴とする方法。 - 前記ポリマーは、ポリエチレン、ポリ乳酸、ポリプロピレン、ポリスチロール、ポリメタクリル酸メチル、ポリカーボネート、アクリロニトリル−ブタジエン−スチレン共重合体、ポリエチレンテレフタラート、ポリアミド、ポリイミド、ポリフェニレンスルファイド、ポリエーテルサルフォン、ポリエーテルエーテルケトン、ゴム、シリコーンゴム、エチレンプロピレンジエンモノマー、エチレン/酢酸ビニル共重合体、熱可塑性ポリウレタン、熱可塑性エラストマーのいずれか1つ又は組成物から選択されるが、これらに限らないことを特徴とする請求項1に記載の超臨界流体により金型を要することなくポリマーの立体構造発泡製品を製造する方法。
- 無定形ポリマーをポリマーとして選択し、前記目標温度はポリマーの融解温度よりも1.0〜50℃低く、圧力は5〜15MPaであることを特徴とする請求項2に記載の超臨界流体により金型を要することなくポリマーの立体構造発泡製品を製造する方法。
- 結晶性ポリマーをポリマーとして選択し、前記目標温度はポリマーの融点温度よりも1.0〜50℃低く、圧力は5〜15MPaであることを特徴とする請求項2に記載の超臨界流体により金型を要することなくポリマーの立体構造発泡製品を製造する方法。
- 前記立体発泡容器と圧力開放装置の減圧速度は、1〜1000MPa/sであることを特徴とする請求項3又は4に記載の超臨界流体により金型を要することなくポリマーの立体構造発泡製品を製造する方法。
- 前記超臨界CO2搬送システムは、液体CO2タンク、CO2増圧ステーションを含み、前記超臨界N2搬送システムは、液体N2タンク、N2増圧ステーションを含むことを特徴とする請求項3又は4に記載の超臨界流体により金型を要することなくポリマーの立体構造発泡製品を製造する方法。
- 前記超臨界CO2搬送システムは、N2/CO2混合ガス搬送システムであり、N2の体積パーセンテージは50〜99%であることを特徴とする請求項1に記載の超臨界流体により金型を要することなくポリマーの立体構造発泡製品を製造する方法。
- ポリマーの微細孔発泡製品の体積膨張倍率は2〜60倍、平均孔径は0.1〜100μm、孔密度は1.0×106〜1.0×1015個/cm3であることを特徴とする請求項3又は4に記載の超臨界流体により金型を要することなくポリマーの立体構造発泡製品を製造する方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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CN201811035299.9 | 2018-09-06 | ||
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