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RU2018120871A - Препрег и способ его изготовления - Google Patents

Препрег и способ его изготовления Download PDF

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Publication number
RU2018120871A
RU2018120871A RU2018120871A RU2018120871A RU2018120871A RU 2018120871 A RU2018120871 A RU 2018120871A RU 2018120871 A RU2018120871 A RU 2018120871A RU 2018120871 A RU2018120871 A RU 2018120871A RU 2018120871 A RU2018120871 A RU 2018120871A
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RU
Russia
Prior art keywords
prepreg
resin
coefficient
temperature range
thermosetting resin
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RU2018120871A
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English (en)
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RU2721112C2 (ru
RU2018120871A3 (ru
Inventor
Итиро ТАКЕТА
Сиори КАВАМОТО
Хироаки САКАТА
Original Assignee
Торэй Индастриз, Инк.
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Publication of RU2018120871A publication Critical patent/RU2018120871A/ru
Publication of RU2018120871A3 publication Critical patent/RU2018120871A3/ru
Application granted granted Critical
Publication of RU2721112C2 publication Critical patent/RU2721112C2/ru

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    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
    • B29C70/205—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres the structure being shaped to form a three-dimensional configuration
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    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Composite Materials (AREA)
  • Reinforced Plastic Materials (AREA)
  • Laminated Bodies (AREA)

Claims (29)

1. Препрег, включающий:
слой волокон, содержащий однонаправленно расположенные углеродные волокна, пропитанные термоотверждающейся смолой; и
слой смолы, существующий по меньшей мере на одной стороне слоя волокон и содержащий термоотверждающуюся смолу и термопластичную смолу, нерастворимую в термоотверждающейся смоле;
где препрег содержит углеродные волокна, имеющие поверхностную массу волокон от 120 до 300 г/м2, и имеет массовую долю смолы от 25 до 50 массовых %; и
где частота экстремальных значений геометрии поверхности по прямой, перпендикулярной волокнам препрега, составляет 30 точек/мм или меньше, когда препрег в течение 24 часов подвергают воздействию температуры, при которой коэффициент межслойного трения - наименьший;
где, используя листы препрега, укладываемые в пакет, измеряют коэффициент межслойного трения препрега с интервалами 10°C в температурном диапазоне от 40 до 80°C в условиях: скорости протягивания 0,2 мм/мин, перпендикулярного напряжения 0,1 бар и смещения при протягивании 1 мм.
2. Препрег по п. 1, где термопластичная смола находится в форме частиц.
3. Препрег по п. 1 или 2, где интервал температур, в котором коэффициент межслойного трения равен 0,1 или меньше, охватывает диапазон от 20°C или больше, где, используя листы препрега, укладываемые в пакет, измеряют коэффициент межслойного трения препрега с интервалами 10°C в температурном диапазоне от 40 до 80°C в условиях: скорости протягивания 0,2 мм/мин, перпендикулярного напряжения 0,1 бар и смещения при протягивании 1 мм.
4. Препрег по любому из пп. 1-3, где температура, при которой степень увеличения коэффициента межслойного трения составляет в пределах 20%, находится в температурном диапазоне от на 10°C ниже до на 10°C выше температуры, при которой коэффициент межслойного трения, в условиях смещения при протягивании 1 мм, является наименьшим,
где, используя листы препрега, укладываемые в пакет, измеряют коэффициент межслойного трения препрега с интервалами 10°C в температурном диапазоне от 40 до 80°C в условиях: скорости протягивания 0,2 мм/мин и перпендикулярного напряжения 0,1 бар,
где степень увеличения равна отношению коэффициента межслойного трения в условиях смещения при протягивании 2 мм к коэффициенту межслойного трения в условиях смещения при протягивании 1 мм.
5. Препрег, включающий:
слой волокон, содержащий однонаправленно расположенные углеродные волокна, пропитанные термоотверждающейся смолой; и
слой смолы, существующий по меньшей мере на одной стороне слоя волокон и содержащий термоотверждающуюся смолу и термопластичную смолу, нерастворимую в термоотверждающейся смоле;
где препрег содержит углеродные волокна, имеющие поверхностную массу волокон от 120 до 300 г/м2, и имеет массовую долю смолы от 25 до 50 массовых %; и
где температура, при которой смещение пуансона составляет 15 мм или больше, находится в температурном диапазоне от 40 до 80°С,
где смещение пуансона измеряют с интервалами 10°C в температурном диапазоне от 40 до 80°C,
где смещение происходит после того, как пуансон приходит в контакт со слоистым препрегом и до того времени, когда на слоистом препреге появляются складки;
где пуансон, который имеет форму полусферы диаметром 30 мм, прижимается к центру слоистого препрега в атмосфере с температурой, выдерживаемой при заданной температуре, и вдавливается в слоистый препрег так, что центр пуансона проходит через центр отверстия в опоре, когда пуансон прижимается к слоистому препрегу; и
где слоистый препрег, квадрат со стороной 150 мм, представляет собой 16 листов препрега, уложенных в пакет, в форме [45/0/-45/90]2S, запаянных в пленку, которая вакуумирована, и размещенных на опоре, имеющей отверстие диаметром 100 мм.
6. Препрег по п. 5, где интервал температур, в котором смещение пуансона равно 15 мм или больше колеблется по ширине от 20°C или больше в температурном диапазоне от 40 до 80°С.
7. Препрег по любому из пп. 1-6, где листы препрега, которые квазиизотропно укладывают в пакет и формируют, имеют прочность на сжатие после удара 250 МПа или больше, измеренную в соответствии с ASTM D7137/7137M-07.
8. Препрег по любому из пп. 1-7, где листы препрега, которые однонаправленно укладывают в пакет и формируют в ламинат, имеют вязкость при разрушении GIC 450 Дж/м2 или больше, измеренную в соответствии с JIS K7086-1993.
9. Препрег по любому из пп. 1-8, где листы препрега, которые однонаправленно укладывают в пакет и формируют в ламинат, имеют вязкость при разрушении GIIC 2200 Дж/м2 или больше, измеренную в соответствии с JIS K7086-1993.
10. Способ получения препрега, включающий:
получение слоя волокон, содержащего однонаправленно расположенные углеродные волокна, пропитанные термоотверждающейся смолой;
размещение по меньшей мере на одной стороне слоя волокон твердой смолы, которая является твердой при 25°С и имеет вязкость 10000 Па·с или меньше при 80°C; и
размещение, на той стороне, на которой твердая смола расположена, слоя смолы, содержащего термоотверждающуюся смолу и термопластичную смолу, нерастворимую в термоотверждающейся смоле;
где полученный препрег содержит углеродные волокна с поверхностной массой волокон от 120 до 300 г/м2 и имеет массовую долю смолы от 25 до 50 массовых %.
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