基于可视化实验的PET膜贴合后除泡过程与压力的关系  

The relationship between the defoaming process after PET film bonding and pressure based on visual experiments

作　　者：胡凌骁 姜慧慧 HU Lingxiao;JIANG Huihui(CETC Fenghua Information-Equipment Co,Ltd,Taiyuan 030000,China)

机构地区：[1]中电科风华信息装备股份有限公司,太原030000

出　　处：《中国塑料》2024年第9期82-87,共6页China Plastics

摘　　要：设计了可视化的压力腔;腔内的压力可测可控,相机可以透过玻璃对除泡过程进行录制;为了定量研究除泡速率与压力的关系,需要保证被研究的泡孔形态大小尽量一致,探索到一种聚对苯二甲酸乙二醇酯(PET)膜贴合方式,既可以将泡孔的直径偏差控制在±10%以内,方便进行试验对照,又可以靠常规工艺完成气泡消除而不产生其他的影响;实验发现在临界压力以下,泡孔不产生变化;而临界压力以上,泡孔的收缩速率与压力成正相关;通过理论分析并且抽象出一种泡孔受压的模型,并在Abaqus中采用显式动力学流体腔的模型对除泡过程进行了模拟,发现与可视化实验观测到的现象基本一致;泡孔缺陷受到压力后,薄膜先克服自身强度发生短暂的弹性形变,然后开始非线性形变,同时泡孔内部空间变小;PET膜的受压变形从中间开始,逐渐向两边扩散,内部气压升高直至平衡。ed to represent the compression behavior of pores under pressure.In Abaqus,the simulation of the defoaming process was conducted using an explicit dynamic fluid cavity model.The simulated results obtained using the fluid cavity model in Abaqus are generally consistent with the experimental observations.When the film and bubbles are subjected to pressure,the film overcomes its own strength and undergoes a brief elastic deforma-tion,and then begins a nonlinear change.At the same time,the internal space of the bubbles begins to shrink.When PET film is subjected to pressure,the deformation starts from the middle and gradually diffuses towards both sides.The internal air pressure of the bubbles increases until a state of mechanical equilibrium is reached.

关 键 词：可视化 除泡 聚对苯二甲酸乙二醇酯 膜 ABAQUS 流体腔 显式动力学 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]