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PREPREG SHEETS AND PREPREG STACKS USEFUL FOR PREPARING LOW VOID CONTENT FIBER-REINFORCED COMPOSITE MATERIALS
PREPREG SHEETS AND PREPREG STACKS USEFUL FOR PREPARING LOW VOID CONTENT FIBER-REINFORCED COMPOSITE MATERIALS
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机译:预浸料板和预浸料堆可用于制备低空隙含量纤维增强复合材料
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摘要
The void content of a cured fiber-reinforced composite material is advantageously reduced, particularly when the composite material article is large in size or fabricated using an out-of-autoclave procedure, by using prepreg sheets impregnated with a thermosettable resin composition containing thermoplastic particles and modified to have one or more characteristics such as a certain level of average surface roughness. Such characteristics may be imparted to the prepreg sheet by, for example, conditioning the prepreg sheet by subjecting it to vacuum conditions in advance of being consolidated and cured as part of a prepreg stack.
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