Consolidation of thermoplastic unidirectional(UD)lami-nate with friction spun core yarns was investigated,espe-cially the characterization of filament bundles in consoli-dation was analyzed.The results showed that the...Consolidation of thermoplastic unidirectional(UD)lami-nate with friction spun core yarns was investigated,espe-cially the characterization of filament bundles in consoli-dation was analyzed.The results showed that the bundleeffect was affected considerably by processing conditions(applied pressure and processing time).The boundaryof the bundles was disappeared under suitable processingconditions and finally an even fiber/resin distributioncould be attained.In consolidation,filament bundlesgetting close each other and resin flowing into the bundl-es occurred simultaneously,and eventually the bundleswere fully impregnated by the resin.Fiber packing den-sity in UD-laminate was the same as that of frictionspun core yarn(55%-65% in volume)and was not af-fected significantly by processing conditions under thecurrent experimental conditions.展开更多
为改善传统弹力包芯纱弹性回复性能,以氨纶、双组分复合长丝(CM800)为芯纱,棉纤维为外包纤维,设计了13种弹力包芯纱。探讨氨纶预牵伸倍数、芯纱线密度和弹力包芯纱反复拉伸次数与弹性回复率之间的关系。采用纱线强伸仪测试氨纶/棉、CM8...为改善传统弹力包芯纱弹性回复性能,以氨纶、双组分复合长丝(CM800)为芯纱,棉纤维为外包纤维,设计了13种弹力包芯纱。探讨氨纶预牵伸倍数、芯纱线密度和弹力包芯纱反复拉伸次数与弹性回复率之间的关系。采用纱线强伸仪测试氨纶/棉、CM800/棉和棉双丝弹力包芯纱的拉伸弹性。结果表明:氨纶的牵伸倍数越大,弹力包芯纱的弹性回复率越小;随着氨纶线密度的增加,包芯纱的弹性回复率先增加后减少;CM800线密度越小,包芯纱的弹性回复率越小;氨纶/棉、CM800/棉和棉双丝弹力包芯纱的定伸长5%和定负荷200 c N反复拉伸次数与纱线弹性回复率的关系均符合幂函数关系,且弹力包芯纱的弹性回复率随着纱线反复拉伸次数的增加而降低;CM800/棉包芯纱的弹性回复率最大,氨纶/棉包芯纱的弹性回复率最小。展开更多
文摘Consolidation of thermoplastic unidirectional(UD)lami-nate with friction spun core yarns was investigated,espe-cially the characterization of filament bundles in consoli-dation was analyzed.The results showed that the bundleeffect was affected considerably by processing conditions(applied pressure and processing time).The boundaryof the bundles was disappeared under suitable processingconditions and finally an even fiber/resin distributioncould be attained.In consolidation,filament bundlesgetting close each other and resin flowing into the bundl-es occurred simultaneously,and eventually the bundleswere fully impregnated by the resin.Fiber packing den-sity in UD-laminate was the same as that of frictionspun core yarn(55%-65% in volume)and was not af-fected significantly by processing conditions under thecurrent experimental conditions.
文摘为改善传统弹力包芯纱弹性回复性能,以氨纶、双组分复合长丝(CM800)为芯纱,棉纤维为外包纤维,设计了13种弹力包芯纱。探讨氨纶预牵伸倍数、芯纱线密度和弹力包芯纱反复拉伸次数与弹性回复率之间的关系。采用纱线强伸仪测试氨纶/棉、CM800/棉和棉双丝弹力包芯纱的拉伸弹性。结果表明:氨纶的牵伸倍数越大,弹力包芯纱的弹性回复率越小;随着氨纶线密度的增加,包芯纱的弹性回复率先增加后减少;CM800线密度越小,包芯纱的弹性回复率越小;氨纶/棉、CM800/棉和棉双丝弹力包芯纱的定伸长5%和定负荷200 c N反复拉伸次数与纱线弹性回复率的关系均符合幂函数关系,且弹力包芯纱的弹性回复率随着纱线反复拉伸次数的增加而降低;CM800/棉包芯纱的弹性回复率最大,氨纶/棉包芯纱的弹性回复率最小。