کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
19820 43132 2016 7 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
A quantitative approach to assess the contribution of seals to the permeability of water vapour and oxygen in thermosealed packages
ترجمه فارسی عنوان
یک روش کمی برای ارزیابی سهم از مهر و موم به نفوذپذیری بخار آب و اکسیژن در بسته های thermosealed
کلمات کلیدی
نفوذپذیری بسته بندی؛ Thermoseals؛ ماندگاری؛ مانع اکسیژن؛ مانع رطوبت
Package permeability; Thermoseals; Shelf-life; Oxygen barrier; Moisture barrier
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
چکیده انگلیسی


• Seals contribution to moisture and oxygen transfer rate in thermosealed packages was assessed.
• Results indicate that seals can be responsible for an increase up to 25% in transfer rate.
• The effect of temperature on PA/PE film moisture barrier was well described by Arrhenius equation.
• The effect of temperature in PVDC coated PET/PE film oxygen barrier was well described by Arrhenius equation.
• The effect of relative humidity in moisture transfer rate of PA/PE packages was assessed.

Shelf-life of many foods is largely dependent on the barrier to moisture and oxygen of the respective package. Barrier is often assessed by measuring the transmission rate of films. However, in thermosealed packages leaks and weak seals can give rise to increased total mass transfer entering the system and reaching the food. While leaks are random defects and are associated to early failure, lower integrity of regular seals tends to affect whole batch causing a decrease in the product shelf-life. In the present work the contribution of the seals to total permeability of packages was assessed by measuring transmission rate of the film and of thermosealed packages of different sizes, therefore with different seals length. Packages made of PA/PE and PVDC coated PET/PE and their respective films were tested for moisture and oxygen transmission rate at different temperature and relative humidity. Results indicate that industrial regular produced seals can account for ca. 25% of the total mass transfer through the system. This decrease of the package barrier as compared to the material barrier will have a significant impact on the product shelf-life and it should be considered in the packaging design process.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Packaging and Shelf Life - Volume 7, March 2016, Pages 34–40
نویسندگان
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