Labthink Instruments Co., Ltd. [email protected] +86-531-85068566 www.labthink.com Case Study: Oxygen Barrier Properties of Recycled PET Bottles Recycling plastic bottles is vital for environmental protection, but it can affect their oxygen barrier properties, making them less suitable for oxygen-sensitive products. Our case study on PET bottles with varying amounts of recycled material found that increasing the recycled content from 25% to 50% only slightly reduced their oxygen barrier. This suggests that using more recycled material does not significantly compromise the bottles' performance. The Problem The growing trend of recycling waste plastic bottles requires an understanding of how reclaimed materials affect a product's performance. For PET bottles, a crucial metric is their ability to act as an oxygen barrier. High oxygen permeability can compromise the quality of packaged goods, limiting the use of recycled materials in food and beverage containers. This study aims to quantify that effect by testing bottles with varying percentages of recycled content.
Open the catalog to page 1Labthink Instruments Co., Ltd. [email protected] +86-531-85068566 www.labthink.com The Test Two types of PET bottle samples were tested: one containing 25% recycled material and another with 50% recycled material. The testing was conducted using the coulometric method, a standard approach for measuring the oxygen transmission rate (OTR) of packaging materials, as outlined in standards such as ASTM F1307-02. The test conditions were set at a temperature of 23∘C and a relative humidity of 100% RH to simulate the environment of liquid-filled bottles. The samples were meticulously sealed onto...
Open the catalog to page 2Labthink Instruments Co., Ltd. [email protected] +86-531-85068566 www.labthink.com The Results The test yielded the following results for the oxygen transmission rates: • 25% Recycled Material: 0.01792cm3/(pkg⋅day) • 50% Recycled Material: 0.01907cm3/(pkg⋅day) The findings showed that the OTRs for both samples were very similar, with the bottle containing 25% recycled material having a slightly better oxygen barrier property. Conclusion The study demonstrates that increasing the recycled content in PET bottles from 25% to 50% only slightly diminishes their oxygen barrier properties. The minimal...
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