JP5990060B2 - 無機系繊維及びその製造方法 - Google Patents
無機系繊維及びその製造方法 Download PDFInfo
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- JP5990060B2 JP5990060B2 JP2012175821A JP2012175821A JP5990060B2 JP 5990060 B2 JP5990060 B2 JP 5990060B2 JP 2012175821 A JP2012175821 A JP 2012175821A JP 2012175821 A JP2012175821 A JP 2012175821A JP 5990060 B2 JP5990060 B2 JP 5990060B2
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Images
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- Inorganic Fibers (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Description
オルトケイ酸テトラエチル、水及び塩酸を1:2:0.0025のモル比で混合し、温度80℃で15時間加熱撹拌した。そして、エバポレータにより、シリカ濃度が44wt%になるまで濃縮した後、粘度が200〜300mPa・sになるまで増粘させて、シリカゾル溶液を得た。
・ノズルからの吐出量:1g/時間
・ノズル先端とドラム捕集体との距離:10cm
・紡糸容器内の温湿度:25℃/30%RH
・ノズルへの印加電圧:+10kV
(焼結炉での焼成条件)
・800℃/2時間
実施例1と同様に作製したシリカ繊維シート(目付:26.0g/m2)を約1g量取り、シリカ繊維シートを重ねて1.5cmの厚さとした後、プレス機により、10MPaの圧力で30秒間加圧することにより粉砕して、平均繊維径1μm、平均繊維長10μm、繊維長のCV値0.266の無機系焼結繊維(アスペクト比:10)を作製した。
ジルコニウムテトラノルマルブトキシド[Zr(OnBu)4]、アセト酢酸エチル、塩化ヒドラジニウム、水を1:1.75:0.02:1.5のモル比で混合し、室温下3日間攪拌した。そして、エバポレータにより、ジルコニア濃度が30wt%になるまで濃縮した後、粘度が2100〜2700mPa・sになるまで増粘させて、ジルコニアゾル溶液を得た。
・ノズルからの吐出量:1g/時間
・ノズル先端とドラム捕集体との距離:10cm
・紡糸容器内の温湿度:25℃/30%RH
・ノズルへの印加電圧:+30kV
(焼結炉での焼成条件)
・800℃/2時間
実施例1と同様にして得たシリカゾル溶液を用い、次の紡糸条件で紡糸した後、次の焼成条件で焼成して、平均繊維径200nmのシリカ繊維シート(目付:13.0g/m2)を得た。
・ノズルからの吐出量:0.2g/時間
・ノズル先端とドラム捕集体との距離:5cm
・紡糸容器内の温湿度:25℃/20%RH
・ノズルへの印加電圧:+10kV
(焼結炉での焼成条件)
・800℃/2時間
実施例1と同様にして作製したシリカ繊維シートを自動乳鉢を用いて粉砕した。つまり、シリカ繊維シート1gを量り取り、水を適量加え、自動乳鉢を用いて、2時間粉砕して、平均繊維径1μm、平均繊維長28.2μm、繊維長のCV値1.27の無機系焼結繊維(アスペクト比:28.2)を作製した。
実施例1と同様にして作製したシリカ繊維シートを自動乳鉢を用いて粉砕した。つまり、シリカ繊維シート1gを量り取り、水を適量加え、自動乳鉢を用いて、4時間粉砕して、平均繊維径1μm、平均繊維長29.2μm、繊維長のCV値0.73の無機系焼結繊維(アスペクト比:29.2)を作製した。
実施例1と同様にして作製したシリカ繊維シートをボールミルを用いて粉砕しようとしたが、粉砕することができなかった。つまり、ボールミルにおける容器空間割合が、シリカ繊維シート、ボール及び隙間を1:1:1とし、ジルコニア製ボールミル(直径:3mm、重量:100g)を約180回転/分で、2時間回転させたが、シリカ繊維シートを粉砕し、無機系焼結繊維を作製することができなかった。
2 ノズル
3 捕集体
4 電圧印加装置
5 紡糸空間
6 紡糸容器
7 気体供給装置
8 排気装置
a1〜a3、b1〜b5、c1〜c6、d1〜d6、e1〜e5 繊維同士の交差点
A1〜A3、B1〜B5、C1〜C7、D1〜D6、E1〜E5 繊維同士の交差点
Claims (1)
- 静電紡糸法により、平均繊維径2μm以下の無機系繊維からなり、無機系繊維同士が交差した無機系繊維シートを形成した後、無機系繊維シートをプレス機で加圧して、平均繊維長100μm未満、かつ繊維長のCV値が0.7以下となるように交差点で粉砕することを特徴とする、無機系繊維の製造方法。
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