JP2021504500A - 連続繊維補強熱可塑性樹脂複合材料及びその製造方法 - Google Patents
連続繊維補強熱可塑性樹脂複合材料及びその製造方法 Download PDFInfo
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Abstract
Description
連続繊維補強熱可塑性樹脂複合中間材(ガラス繊維強化ポリプロピレン、ガラス繊維の含有量:50wt%)であって、それぞれヤーン状(直径:1.2mm)に用意し、加熱装置の加熱部に6個を投入(図3(A)を参照)した後、熱を加えてノズルを通過させて組糸にして成形し、棒状の連続繊維補強熱可塑性樹脂複合材料(直径約7mm)を製造した。加熱部の温度は180℃、生産速度は0.5m/sに設定した。
中間材をテープ状(厚さ:0.5mm、幅:12mm)に用意し、加熱装置の加熱部に3個を投入したことを除いては、実施例1と同様の方法で棒状の連続繊維補強熱可塑性樹脂複合材料を製造した。
実施例2で中間材を4個投入したことを除いては、実施例2と同様の方法で棒状の連続繊維補強熱可塑性樹脂複合材料を製造した。
実施例2で中間材を5個投入したことを除いては、実施例2と同様の方法で棒状の連続繊維補強熱可塑性樹脂複合材料を製造した。
実施例2で中間材を6個投入(図3(B)を参照)したことを除いては、実施例2と同様の方法で棒状の連続繊維補強熱可塑性樹脂複合材料を製造した。
実施例3で加熱部の温度を170℃に設定したことを除いては、実施例3と同様の方法で棒状の連続繊維補強熱可塑性樹脂複合材料を製造した。
実施例3で加熱部の温度を190℃に設定したことを除いては、実施例3と同様の方法で棒状の連続繊維補強熱可塑性樹脂複合材料を製造した。
実施例3で加熱部の温度を200℃に設定したことを除いては、実施例3と同様の方法で棒状の連続繊維補強熱可塑性樹脂複合材料を製造した。
実施例3で加熱部の温度を210℃に設定したことを除いては、実施例3と同様の方法で棒状の連続繊維補強熱可塑性樹脂複合材料を製造した。
実施例3で加熱部の温度を220℃に設定したことを除いては、実施例3と同様の方法で棒状の連続繊維補強熱可塑性樹脂複合材料を製造した。
前記実施例1〜10によって製造された棒状の連続繊維補強熱可塑性樹脂複合材料に対し、下記方法に従って曲げ強度(図8を参照)及び気孔率を測定し、その結果を下記表1に示した。この際、実施例5による中間材の断面の写真、及び棒状の複合素材の断面の写真をそれぞれ図9及び図10に示した。
曲げ強度の測定は、ASTM D4474の試験規格を準拠して行っており、図8のように製作された棒状の連続繊維補強熱可塑性樹脂複合材料に3点曲げ荷重を印加して、最大荷重点を測定した。
気孔率の測定は、ASTM D2734の試験規格を準拠して行っており、下記数式2に従って測定し、計算した。複合材料の理論的な理想密度と実験的に測定した実測密度を比較することにより、下記数式2によって計算される。互いに異なるサンプルを利用して3回以上測定した後、平均値で気孔率を計算した。
Claims (13)
- 複数のヤーン(yarn)またはテープ(tape)の中間材が組糸になって棒状に形成された連続繊維補強熱可塑性複合材料。
- 前記複合材料は、気孔率が1〜10体積%であることを特徴とする、請求項1に記載の連続繊維補強熱可塑性樹脂複合材料。
- 前記複合材料は、前記複合材料の断面を基準に下記数式1を満足することを特徴とする、請求項1に記載の連続繊維補強熱可塑性樹脂複合材料:
数式1において、P及びAはそれぞれ前記複合材料の断面の周縁の長さ及び断面の面積である。 - 前記テープは、0.1〜1.0mmの厚さ及び3〜30mmの幅を有することを特徴とする、請求項1に記載の連続繊維補強熱可塑性樹脂複合材料。
- 前記組糸は、前記ヤーンまたはテープ2〜10個が投入されて組糸になることを特徴とする、請求項1に記載の連続繊維補強熱可塑性樹脂複合材料。
- 前記連続繊維は、ガラス繊維または炭素繊維であることを特徴とする、請求項1に記載の連続繊維補強熱可塑性樹脂複合材料。
- (a)複数のヤーン(yahn)またはテープ(tape)状の中間材を加熱部に連続的に投入するステップと、
(b)前記中間材を前記中間材に含まれている熱可塑性樹脂の融点以上の温度に加熱し、少なくとも前記中間材表面の熱可塑性樹脂の一部を溶融させるステップと、
(c)前記溶融された中間材の2個以上をノズルに通過させて組糸にして棒状に成形するステップと、
を含む、連続繊維補強熱可塑性樹脂複合材料の製造方法。 - 前記中間材は、前記連続繊維の含有量が30〜60重量%及び前記熱可塑性樹脂の含有量が40〜70重量%であることを特徴とする、請求項7に記載の連続繊維補強熱可塑性樹脂複合材料の製造方法。
- 前記ステップ(b)における加熱は、前記熱可塑性樹脂の融点より20〜40℃高い温度で行われることを特徴とする、請求項7に記載の連続繊維補強熱可塑性樹脂複合材料の製造方法。
- 前記ノズルは断面の形状に屈曲がないか、1以上の凹凸が形成されることを特徴とする、請求項7に記載の連続繊維補強熱可塑性樹脂複合材料の製造方法。
- 前記ノズルを介して吐出される前記棒を回転させてらせん状に形成させることを特徴とする、請求項4に記載の連続繊維補強熱可塑性樹脂複合材料の製造方法。
- 前記ノズルは、出口端部の直径に対する入口端部の直径の比が1.5〜5、及び出口端部の直径に対する長さの比が2〜10であることを特徴とする、請求項4に記載の連続繊維補強熱可塑性樹脂複合材料の製造方法。
- 前記ノズルは多段に形成され、出口の方に向かって直径が減少することを特徴とする、請求項4に記載の連続繊維補強熱可塑性樹脂複合材料の製造方法。
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PCT/KR2018/015006 WO2019107991A1 (ko) | 2017-11-29 | 2018-11-29 | 연속섬유 보강 열가소성 수지 복합재료 및 그 제조방법 |
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WO2014153535A2 (en) | 2013-03-22 | 2014-09-25 | Gregory Thomas Mark | Three dimensional printing |
US9579851B2 (en) | 2013-03-22 | 2017-02-28 | Markforged, Inc. | Apparatus for fiber reinforced additive manufacturing |
US9126365B1 (en) | 2013-03-22 | 2015-09-08 | Markforged, Inc. | Methods for composite filament fabrication in three dimensional printing |
US9694544B2 (en) | 2013-03-22 | 2017-07-04 | Markforged, Inc. | Methods for fiber reinforced additive manufacturing |
US11981069B2 (en) * | 2013-03-22 | 2024-05-14 | Markforged, Inc. | Three dimensional printing of composite reinforced structures |
WO2021127329A1 (en) * | 2019-12-20 | 2021-06-24 | Universal Fibers, Inc. | Multifilament feedstocks for fused deposition modeling |
WO2023186656A1 (en) | 2022-03-28 | 2023-10-05 | Signify Holding B.V. | A method for printing a 3d object using fiber bundles |
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JPH05278126A (ja) * | 1992-04-02 | 1993-10-26 | Toyobo Co Ltd | 繊維強化熱可塑性樹脂成形材 |
JPH0978998A (ja) * | 1995-09-08 | 1997-03-25 | Nippon Glass Fiber Co Ltd | 引張構造部材並びに引張構造部材の製造方法及び成形装置 |
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WO2019107991A1 (ko) | 2019-06-06 |
JP7340521B2 (ja) | 2023-09-07 |
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