孔末端效应对微孔包装内气体动态平衡的影响  

Influence of Perforation End Effect on Dynamic Equilibrium of Gas in Perforated Packaging

作　　者：李家政[1] 李晓旭[2] 王晓芸[2] 

机构地区：[1]国家农产品保鲜工程技术研究中心天津市农产品采后生理与贮藏保鲜重点实验室,天津300384 [2]天津科技大学包装与印刷工程学院,天津300222

出　　处：《包装工程》2013年第23期14-17,26,共5页Packaging Engineering

基　　金：天津市自然科学基金一般项目(13JCYBJC25600)

摘　　要：设计、组装了一套简易的微孔包装。以CO2为实验气体,理论上分析了微孔包装内CO2气体浓度的动态变化规律,同时测定了微孔包装内CO2气体浓度的动态变化数据。研究结果表明,微孔包装内实际测定的CO2气体浓度远高于理论值。采用孔末端效应对此差异进行了分析,并提出了孔有效长度矫正公式d ef=d+7r/6。A simple packaging device with perforations was set up. CO2 was used as experimental gas. Dynamical CO2 concentration in the package was theoretically analyzed and practically measured. Results showed that practical measurement of CO2 concentration in the package were much higher than theoretical analysis. The results were explicated as perforation end effect, and meanwhile the corrective formula of effective length of perforation in the film was put forward, which was def=d＋7r/6.

关 键 词：微孔 包装 动态平衡 孔末端效应 

分 类 号：TS206.4[轻工技术与工程—食品科学]