注射成型和注射压缩成型透明件的光学性能对比与分析  

Comparison on Optical Properties of Injection Molded and Injection Compression Molded Transparencies

作　　者：陈宇宏[1] 袁渊[1] 刘小艳[2] 郭丹丹[2] 白一峰[2] 

机构地区：[1]北京航空材料研究院,北京100095 [2]北京航空航天大学,北京100191

出　　处：《航空材料学报》2011年第2期55-60,共6页Journal of Aeronautical Materials

基　　金：国家高技术研究发展计划(863)(2007AA03Z534)

摘　　要：通过测试注射成型和注射压缩成型透明件的光学性能以及内应力分布和厚度分布,并结合两种成型方式的技术特点,对注射成型和注射压缩成型透明件的光学性能进行了详细的比较和分析,结果表明:注射成型和注射压缩成型透明件具有良好的表观光学质量,透光率和雾度接近,这与两者在成型材料和表面粗糙度一致有关。但与注射成型透明件相比,注射压缩成型透明件具有更低的双折射、光学畸变和角偏差。注射压缩成型透明件的低双折射源于内部大分子取向程度低,从而取向应力低;低光学畸变和低角偏差光学性能特点除了与低残余应力有关,还与注射压缩成型具有更均匀的收缩率有关。Optical properties,residual stress and thickness distribution of injection molded（IM） and injection compression molded（ICM） transparencies were tested and molding principles of the transparencies were also studied.The results showed that ICM transparencies had similar appearance quality,transmittance and haze to IM parts,as a result of the same material and close surface roughness.But ICM parts possessed much smaller birefringence,optical distortion and angular deviation than IM parts.ICM parts exhibited little molecular orientation,thus having well-distributed residual stresses and low birefringence.Low optical distortion and angular deviation of ICM parts were not only associated with small and well-distributed residual stresses,but also related to even shrinkage.Consequently,optical quality of ICM transparencies was superior to that of IM transparencies.

关 键 词：注射成型 注射压缩成型 双折射 光学畸变 角偏差 收缩 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]