热塑性GMT片材预热技术研究  

Study on Preheating Technology for GMT Thermoplastic Sheet

作　　者：朱永全[1] 路慧玲[1] 戴干策[1] 

机构地区：[1]华东理工大学聚合物加工研究室,上海200237

出　　处：《塑料工业》2000年第3期35-37,共3页China Plastics Industry

基　　金：国家"8 63"项目;上海市科委及上海市汽车基金

摘　　要：较为系统地研究了热塑性复合材料GMT片材的预热过程 ,对热板接触、热空气对流及远红外预热过程进行了对比实验研究。热板接触式预热能够使片材快速均匀升温 ,但预热后的片材与热板发生粘附 ;远红外预热虽然升温速率很快 ,但是在片材内部形成较大的温度梯度 ;热空气对流预热的升温速率较慢 ,但片材内部温度梯度很小 ,且可加工区间较宽 。s [WT5BZ]In this paper,preheating process of glass mat reinforced thermoplastic (GMT) sheets was studied systematically.The different preheating ways,such as contact heating,thermal air convection,and infrared heating,were adopted in our study.Quick,stable and uniform preheating of GMT sheets could be achieved by contact heating,but the tackiness of the matrix material on heating plates was a big problem.Although infrared heating could make preheating of GMT sheets finished quickly,the obvious temperature gradient occured in the thickness direction.The thermal air convection heating was the lowest way in our study,whereas it could greatly reduce the temperature gradient in the interior of the sheets. [WT5HZ]

关 键 词：GMT片材 热塑性复合材料 预热 

分 类 号：TQ316[化学工程—高聚物工业]