高阻隔性复合PEN/PET饮料包装瓶的制备及阻隔性能研究  

Preparation and Barrier Properties of High Barrier Composite PEN/PET Beverage Packaging Bottle

作　　者：李梓绮 李雪 尹昊 任迪峰[1] LI Zi-qi;LI Xue;YIN Hao;REN Di-feng(Department of Food Science and Engineering,College of Biological Sciences and Biotechnology,Beijing Forestry University,Beijing Key Laboratory Food Processing and Safety in Forestry,Beijing 100083,China)

机构地区：[1]北京林业大学生物科学与技术学院食品科学与工程系,林业食品加工与安全北京市重点实验室,北京100083

出　　处：《饮料工业》2024年第2期1-8,共8页Beverage Industry

基　　金：国家重点研发计划项目“现代饮料高速灌装加工技术及成套装备研发(项目编号:2018YFD0400900)”。

摘　　要：PET瓶是当前市场上广泛应用的饮料包装瓶之一,但随着消费者对饮料品质要求的提升,对饮料包装瓶的气体阻隔性有了更高的要求。为了改进纯聚对苯二甲酸乙二醇酯(PET)瓶的阻隔性,本实验利用熔融共混的方法制备PEN/PET复合材料,在确定共混材料的最佳配比后,加工制得复合聚萘二甲酸乙二醇酯/聚对苯二甲酸乙二醇酯(PEN/PET)饮料包装瓶,并通过测定氧气、二氧化碳和水蒸气的透过量,以及紫外阻隔性能、光学性能、机械性能和耐热性能,对其进行阻隔性能分析。通过综合分析比较,确定PEN30%wt、PET70%wt为最佳配比。制得的复合PEN/PET饮料包装瓶与普通PET瓶相比,氧气阻隔性增加3.48倍,二氧化碳阻隔性增加7.36倍,水蒸气阻隔性增加2.25倍,除此之外,其紫外线阻隔性等性能也有显著提高。在常温下贮藏70d后,复合PEN/PET瓶对饮料的保存效果明显优于纯PET瓶。复合PEN/PET饮料包装瓶改进了纯PET瓶的阻隔性较弱的问题。Polyethylene glycol terephthalate(PET)bottle is one of the widely used beverage packaging bottles in the current market,but with the improvement of consumers'requirements for beverage quality,the gas barrier of beverage packaging bottles has higher requirements.To obtain a beverage packaging bottle with a high barrier,this experiment employed the method of melting blending to prepare Polyethylene naphthalate two formic acid glycol ester/Polyethylene glycol terephthalate(PEN/PET)composite material.After determining the best proportion of blending material,the composite Polyethylene naphthalate two formic acid glycol ester/Polyethylene glycol terephthalate(PEN/PET)beverage packaging bottle was prepared by processing,and its barrier properties were analyzed through measuring oxygen,carbon dioxide and water vapor permeance,as well as ultraviolet barrier properties,optical properties,mechanical properties and heat resistance.Through comprehensive analysis and comparison,the optimal ratio of PEN 30%wt and PET 70%wt was determined.Compared with pure PET bottles,the composite PEN/PET beverage packaging bottle had more oxygen,carbon dioxide,and water vapor barrier properties by 3.48 times,7.36 times and 2.25 times,respectively.In addition,its ultraviolet and other barrier properties had also been significantly improved.After 70 days of storage at different temperatures,the composite PEN/PET bottle was significantly better than the pure PET bottle in beverage preservation.Composite PEN/PET beverage packaging bottle improved the problem of weak barrier of pure PET bottle.

关 键 词：PET PEN 高阻隔性 熔融共混 

分 类 号：TS275[轻工技术与工程—农产品加工及贮藏工程]