Barrier and Shelf-Life Testing for Packaging
4 patents in this list
Updated:
In packaging applications, barrier performance degradation follows complex pathways influenced by environmental conditions, material properties, and time. Current testing protocols show that moisture transmission rates can vary from 0.01 to 10 g/m²/day across different barrier materials, while oxygen transmission may range from 0.01 to 100 cc/m²/day. These variations significantly impact product shelf-life predictions and material selection decisions.
The fundamental challenge lies in developing accelerated testing methods that accurately predict long-term barrier performance while accounting for multiple failure mechanisms and environmental stressors.
This page brings together solutions from recent research—including thermal aging parameters for polymer storage life, anisotropic degradation assessment in liquid crystal polymers, sequential failure mechanism testing, and dynamic moisture barrier evaluation techniques. These and other approaches help packaging engineers make informed decisions about material selection and shelf-life predictions under real-world conditions.
1. System and Method for Evaluating Polymer Storage Life Using Thermal Aging Parameters Under Variable Temperature Conditions
SOUTHWEST TECH & ENGINEERING INSTITUTE OF CHINA SOUTH INDUSTRIES GROUP, 2023
Accurate method and system for evaluating the storage life of polymer materials under time-varying temperature conditions. The method involves determining the performance change rate constant, frequency factor, and apparent activation energy of a polymer material through thermal aging accelerated tests at different temperatures. These parameters are then used to predict the storage life under natural temperature variations. The system is a computer program that implements this method. It allows accurate assessment of polymer material longevity under fluctuating real-world temperature conditions.
2. Method for Assessing Anisotropic Degradation in Liquid Crystal Polymer Materials Through Directional Aging Tests
CHINA ELECTRONIC PROD RELIABILITY & ENVIRONMENTAL TESTING RES INST 5TH ELECTRONIC RES, 2022
Determining the lifetime of LCP (liquid crystal polymer) materials used in 5G electronics. The method involves aging tests on LCP samples in different directions to determine the key features that degrade fastest. By finding the critical values for these features, the method determines the LCP lifetime under specific environmental conditions. It considers anisotropy of LCP properties, as they differ in casting vs vertical directions. The approach involves aging tests on LCP samples in both directions, identifying the critical degradation points, and using them to determine lifetime under specific environmental conditions.
3. Accelerated Testing Method for Estimating Storage Life of Products with Sequential Failure Mechanisms Using Temperature Cycling and Constant Environmental Stress
NO.63961 TROOPS OF PLA, People's Liberation Army Unit 63961, 2022
Determining the storage life of long-term storage products with two-stage failure mechanisms like PCBs and pyrotechnics by using accelerated testing to more accurately estimate product lifetime. The test involves two stages with different stresses that mimic the sequential failure mechanisms. The first stage uses temperature cycling to damage the product structure, then a second stage with constant temperature and humidity to accelerate chemical reactions. The test data from both stages is used to estimate the lifetimes T1 and T2 for the two stages. The overall storage life T is the sum of T1 and T2.
4. Dynamic Evaluation Method for Moisture Barrier Performance of Three-Dimensional Cigarette Packages Using Water Matrix and Quantitative Index Calculation
SHANGHAI TOBACCO GROUP CO LTD, 2021
Method for evaluating the moisture barrier performance of three-dimensional cigarette packages. The method involves dynamically studying the moisture quality change of cigarette packages containing water-retaining or water-absorbing matrix in a constant temperature and humidity environment. The data is fit and calculated to obtain a moisture barrier index r. This index quantifies the moisture barrier performance of different research objects like the entire package, single-layer materials, material itself, and gaps between layers.
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