公开(公告)号：US5312579A

公开(公告)日：1994-05-17

申请号：US924689

申请日：1992-07-30

申请人： Darleen A. Druyun ,  Tan-Hung Hou ,  Paul W. Kidder ,  Rakasi M. Reddy ,  Robert M. Baucom

发明人： Darleen A. Druyun ,  Tan-Hung Hou ,  Paul W. Kidder ,  Rakasi M. Reddy ,  Robert M. Baucom

IPC分类号： B29C70/46 ,  C08J5/24 ,  B29C67/14

CPC分类号： C08J5/24 ,  B29C70/46 ,  C08J2379/08

摘要： A low pressure process was developed for preparing a well-consolidated polyimide composite laminate. Prepreg plies were formed from unidirectional fibers and a polyamic acid resin solution. Molding stops were placed at the sides of a matched metal die mold. The prepreg plies were cut shorter than the length of the mold in the in-plane lateral direction and were stacked between the molding stops to a height which was higher than the molding stops. The plies were then compressed to the height of the stops and heated to allow the volatiles to escape and to start the imidization reaction. After removing the stops from the mold, the heat was increased and 0-500 p.s.i. pressure was applied to complete the imidization reaction. The heat and pressure were further increased to form a consolidated polyimide composite laminate.

摘要翻译： 开发了一种用于制备良好固化的聚酰亚胺复合层压板的低压方法。 预浸层由单向纤维和聚酰胺酸树脂溶液形成。 成型止挡件放置在匹配的金属模具的侧面。 将预浸料坯在面内横向方向上比模具的长度短，并且在模制止挡件之间堆叠到高于模制件的高度。 然后将层压缩至止挡件的高度并加热以允许挥发物逸出并开始酰亚胺化反应。 从模具中取出止动件后，热量增加，0-500 p.s.i。 施加压力以完成酰亚胺化反应。 进一步增加热和压力以形成固化的聚酰亚胺复合层压材料。