JP2010084281A - 繊維状補強剤及びその製造方法 - Google Patents
繊維状補強剤及びその製造方法 Download PDFInfo
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- JP2010084281A JP2010084281A JP2008255391A JP2008255391A JP2010084281A JP 2010084281 A JP2010084281 A JP 2010084281A JP 2008255391 A JP2008255391 A JP 2008255391A JP 2008255391 A JP2008255391 A JP 2008255391A JP 2010084281 A JP2010084281 A JP 2010084281A
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Abstract
【解決手段】本発明の繊維状補強剤は、セルロース系繊維(A)と、合成樹脂繊維(B)とに、溶媒中で機械的剪断力を作用させて得られる繊維(A)及び(B)の微小繊維を含有する。繊維(B)は、オレフィン系の分割繊維であってもよい。セルロース系繊維(A)と、繊維(B)との固形分重量比は、10/90〜90/10であってもよい。
【選択図】なし
Description
セルロース系繊維としては、高等植物由来のセルロース繊維[例えば、木材繊維(針葉樹、広葉樹などの木材パルプなど)、竹繊維、サトウキビ繊維、種子毛繊維(コットンリンター、ボンバックス綿、カポックなど)、ジン皮繊維(例えば、麻、コウゾ、ミツマタなど)、葉繊維(例えば、マニラ麻、ニュージーランド麻など)などの天然セルロース繊維(パルプ繊維)など]、動物由来のセルロース繊維(ホヤセルロースなど)、バクテリア由来のセルロース繊維、化学的に合成されたセルロース繊維[セルロースアセテート(酢酸セルロース)、セルロースプロピオネート、セルロースブチレート、セルロースアセテートプロピオネート、セルロースアセテートブチレートなどの有機酸エステル;硝酸セルロース、硫酸セルロース、リン酸セルロースなどの無機酸エステル;硝酸酢酸セルロースなどの混酸エステル;ヒドロキシアルキルセルロース(例えば、ヒドロキシエチルセルロース(HEC)、ヒドロキシプロピルセルロースなど);カルボキシアルキルセルロース(カルボキシメチルセルロース(CMC)、カルボキシエチルセルロースなど);アルキルセルロース(メチルセルロース、エチルセルロースなど);再生セルロース(レーヨン、セロファンなど)などのセルロース誘導体など]などが挙げられる。これらのセルロース系繊維は、単独で又は二種以上組み合わせて使用してもよい。
セルロース系繊維(A)と組み合わせて用いる合成樹脂繊維(B)としては、セルロース系繊維以外の各種樹脂繊維が使用できる。樹脂繊維(B)は、セルロース系繊維(A)とともに機械的剪断処理することにより、微小繊維が得られる種類の樹脂の繊維であればよく、微小繊維(フィブリル化又はミクロフィブリル化繊維)であってもよく、機械的剪断処理により微小化(フィブリル化又はミクロフィブリル化)可能な繊維であってもよい。
前記繊維状補強剤は、セルロース系繊維(A)と、合成樹脂繊維(B)とを、溶媒中で機械的に剪断処理して、懸濁液を調製し、この懸濁液から溶媒を除去することにより製造できる。
市販のクラフトパルプ(平均繊維長3mm、平均繊維径12μm)100g、及び繊維状のポリプロピレン樹脂(EDC810 チッソポリプロ社製)100gに、水20Lを加え、よく撹拌した。得られた分散液を均質化装置(GAULIN社製 15M−8TA、高圧ホモジナイザー)に常温で仕込み、44.1MPaの圧力をかけて15回通過させてスラリー状懸濁液を得た。このスラリー状懸濁液を遠心脱液機により脱液し、次いでイソプロピルアルコール100Lを用いて溶剤置換を行った。さらに脱液した後、乾燥して、綿状の熱可塑性繊維/ミクロフィブリル化(MF化)セルロース複合体を得た。
市販のクラフトパルプを用いることなくスラリー懸濁液を調製する以外は、実施例1と同様の操作を行い、綿状の複合体に代えてMF化PP繊維を得た。
市販のクラフトパルプ(平均繊維長3mm、平均繊維径12μm)100gに水20Lを加え、よく撹拌した。得られた分散液を均質化装置(GAULIN社製 15M−8TA、高圧ホモジナイザー)に常温で仕込み、44.1MPaの圧力をかけて15回通過させて、ミクロフィブリル化(MF化)セルロースのスラリー状懸濁液を得た。
(1)密度
ISO1183に準じて、密度(g/cm3)を測定した。
(2)曲げ強さ及び曲げ弾性率
ISO178に準じて、曲げ強さ(MPa)及び曲げ弾性率(MPa)を測定した。
(3)シャルピー衝撃強さ
ISO179/1eAに準じて、23℃にて、ノッチ付き試験片を用いてシャルピー衝撃強さ(kJ/m2)を測定した。
(4)荷重たわみ温度
ISO75に準じて、1.80MPa及び0.45MPaの条件にて、荷重たわみ温度(℃)を測定した。
Claims (9)
- マトリックス樹脂を補強するための繊維状補強剤であって、セルロース系繊維(A)と、合成樹脂繊維(B)とに、溶媒中で、機械的剪断力を作用させて得られ、かつ前記セルロース系繊維(A)及び合成樹脂繊維(B)の微小繊維を含む繊維状補強剤。
- 合成樹脂繊維(B)が、繊維状オレフィン系樹脂、又は繊維状オレフィン系樹脂を叩解処理して得られる微小繊維状オレフィン系樹脂である請求項1記載の繊維状補強剤。
- セルロース系繊維(A)の微小繊維と、合成樹脂繊維(B)の微小繊維とを、10/90〜90/10の割合(固形分重量比)で含有する請求項1又は2記載の繊維状補強剤。
- セルロース系繊維(A)の微小繊維及び合成樹脂繊維(B)の微小繊維が、それぞれ、平均繊維長(L)0.01〜1mm、平均繊維径(D)0.001〜1μm、及びアスペクト比(L/D)100〜10000を有する請求項1〜3の何れかの項に記載の繊維状補強剤。
- セルロース系繊維(A)と合成樹脂繊維(B)とを、溶媒中で機械的に剪断処理して、懸濁液を調製し、この懸濁液から溶媒を除去して、セルロース系繊維(A)及び合成樹脂繊維(B)の微小繊維を含む繊維状補強剤を製造する方法。
- 機械的剪断処理が、ホモジナイズ処理である請求項5記載の製造方法。
- 請求項1〜4の何れかの項に記載の繊維状補強剤を含む繊維強化樹脂。
- 繊維状補強剤と、合成樹脂繊維(B)を構成する樹脂繊維と同種の樹脂とを含む請求項7記載の繊維強化樹脂。
- 請求項7又は8記載の繊維強化樹脂で形成された樹脂成形体。
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| JP2010215887A (ja) * | 2009-02-20 | 2010-09-30 | Daicel Polymer Ltd | 熱可塑性材料組成物 |
| JP2012025949A (ja) * | 2010-06-25 | 2012-02-09 | Mitsubishi Chemicals Corp | 微細セルロース繊維分散液およびセルロース繊維複合体並びにその製造方法 |
| JP2017132988A (ja) * | 2016-01-25 | 2017-08-03 | 王子ホールディングス株式会社 | 微細セルロース繊維含有樹脂組成物及びその製造方法 |
| JP2019056088A (ja) * | 2017-09-22 | 2019-04-11 | 株式会社吉川国工業所 | 繊維強化複合材料 |
| WO2022118888A1 (ja) * | 2020-12-03 | 2022-06-09 | 東亞合成株式会社 | 樹脂組成物、樹脂組成物の製造方法、及び樹脂 |
| JP2022184494A (ja) * | 2021-06-01 | 2022-12-13 | フタムラ化学株式会社 | セルロースファイバー複合樹脂原料の製造方法及びセルロースファイバー複合樹脂成形物の製造方法 |
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| WO2022118888A1 (ja) * | 2020-12-03 | 2022-06-09 | 東亞合成株式会社 | 樹脂組成物、樹脂組成物の製造方法、及び樹脂 |
| JPWO2022118888A1 (ja) * | 2020-12-03 | 2022-06-09 | ||
| JP2022184494A (ja) * | 2021-06-01 | 2022-12-13 | フタムラ化学株式会社 | セルロースファイバー複合樹脂原料の製造方法及びセルロースファイバー複合樹脂成形物の製造方法 |
| JP7731223B2 (ja) | 2021-06-01 | 2025-08-29 | フタムラ化学株式会社 | セルロースファイバー複合樹脂原料の製造方法及びセルロースファイバー複合樹脂成形物の製造方法 |
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