{"id":13531,"date":"2026-09-28T13:20:44","date_gmt":"2026-09-28T10:20:44","guid":{"rendered":"https:\/\/www.packlab.gr\/?p=13531"},"modified":"2026-09-30T13:31:22","modified_gmt":"2026-09-30T10:31:22","slug":"pla-cups-microplastics-pe-study","status":"publish","type":"post","link":"https:\/\/www.packlab.gr\/en\/pla-cups-microplastics-pe-study\/","title":{"rendered":"PLA-Lined Cups Release 12 Times More Microplastics Than Conventional PE, University of Queensland Study Finds"},"content":{"rendered":"<p style=\"text-align: justify;\">A peer-reviewed study published in <a href=\"https:\/\/pubs.acs.org\/afsthl\/article-abstract\/doi\/10.1021\/acsfoodscitech.6c00541\/5328286\/Release-of-Nanoplastic-and-Microplastic-from\" target=\"_blank\" rel=\"noopener nofollow\">ACS Food Science &amp; Technology<\/a> on August 25<sup>th<\/sup>, \u00a02026 has found that single-use paper cups lined with biodegradable polylactic acid (PLA) release approximately 12 times more microplastic and nanoplastic particles than cups lined with conventional polyethylene (PE) when exposed to hot water.<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_87 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">TABLE OF CONTENTS<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.packlab.gr\/en\/pla-cups-microplastics-pe-study\/#What_the_Study_Measured\" >What the Study Measured<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.packlab.gr\/en\/pla-cups-microplastics-pe-study\/#Why_this_Matters_for_Packaging_Producers\" >Why this Matters for Packaging Producers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.packlab.gr\/en\/pla-cups-microplastics-pe-study\/#Context_and_Limitations\" >Context and Limitations<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.packlab.gr\/en\/pla-cups-microplastics-pe-study\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n\n<p style=\"text-align: justify;\">The research, conducted by a team from the <a href=\"https:\/\/news.uq.edu.au\/2026-08-takeaway-cups-release-microplastics-your-coffee\" target=\"_blank\" rel=\"noopener nofollow\">University of Queensland&#8217;s<\/a> Queensland Alliance for Environmental Health Sciences, compared particle release from both cup types under conditions simulating hot beverage use. The findings challenge a widely held assumption in the packaging industry: that biodegradable alternatives are inherently safer or cleaner than their fossil-based counterparts.<\/p>\n<p>&nbsp;<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"What_the_Study_Measured\"><\/span><strong>What the Study Measured<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">The researchers filled PE-lined and PLA-lined paper cups with hot water and measured the particles released using a combination of advanced analytical methods, including mass spectrometry, nanoparticle tracking and electron microscopy.<\/p>\n<p style=\"text-align: justify;\">PLA-lined cups released a total particle mass of approximately 11.6 \u03bcg\/L, compared to 0.9 \u03bcg\/L from PE-lined cups. In terms of nanoparticle count, PLA cups released approximately 4.3 million particles per milliliter, compared to 2.7 million from PE cups.<\/p>\n<p style=\"text-align: justify;\">Surface analysis of the cups after exposure revealed physical deformation of PLA coatings but no detectable chemical degradation, suggesting the particles are released through physical breakdown rather than chemical decomposition.<\/p>\n<p>&nbsp;<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Why_this_Matters_for_Packaging_Producers\"><\/span><strong>Why this Matters for Packaging Producers<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">The study&#8217;s findings are relevant to the packaging sector for several reasons.<\/p>\n<p style=\"text-align: justify;\">Firstly, they challenge the narrative that PLA is a straightforward drop-in replacement for PE in food contact applications. PLA is widely used in compostable food packaging, including cups, containers and food service items, precisely because it is marketed as a more sustainable material. The finding that it releases substantially more particles into hot liquids raises questions about how &#8220;sustainable&#8221; and &#8220;safe&#8221; are balanced in material selection decisions.<\/p>\n<p style=\"text-align: justify;\">Moreover, the study highlights a gap in how food contact materials are currently assessed. <strong>Regulation (EU) 10\/2011<\/strong> governs the migration of chemical substances from plastic food contact materials, but micro and nanoplastic particle release is not specifically covered by existing migration testing methodologies. The researchers called for regulators to consider safety guidelines or product label warnings for food contact materials and for manufacturers to develop cup linings that release fewer particles when exposed to hot liquids.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\"><strong><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-13527\" src=\"https:\/\/www.packlab.gr\/wp-content\/uploads\/2026\/09\/1.3-2-1024x768.png\" alt=\"Stacked single-use paper cups in a caf\u00e9, illustrating the PLA-lined cups found to release 12 times more microplastics than PE-lined cups\" width=\"1024\" height=\"768\" srcset=\"https:\/\/www.packlab.gr\/wp-content\/uploads\/2026\/09\/1.3-2-1024x768.png 1024w, https:\/\/www.packlab.gr\/wp-content\/uploads\/2026\/09\/1.3-2-300x225.png 300w, https:\/\/www.packlab.gr\/wp-content\/uploads\/2026\/09\/1.3-2-768x576.png 768w, https:\/\/www.packlab.gr\/wp-content\/uploads\/2026\/09\/1.3-2.png 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/strong><\/p>\n<p>&nbsp;<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Context_and_Limitations\"><\/span><strong>Context and Limitations<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">One of the researchers, Dr Elvis Okoffo, emphasized that the findings should not be interpreted as a recommendation to stop using paper cups or that PLA is inherently unsafe. The health effects of ingesting micro- and nanoplastic particles remain unclear, and the study did not assess toxicological outcomes.<\/p>\n<p style=\"text-align: justify;\">It is also worth noting that the study tested cups under controlled conditions using ultrapure water at a neutral pH. Real beverages such as coffee (pH ~ 5) and tea (pH ~ 4.9-5.5) are more acidic, which previous research suggests may increase particle release. The actual exposure during everyday use could therefore be higher than what the study measured.<\/p>\n<p style=\"text-align: justify;\">The study builds on earlier research published in 2023 that found PLA-lined cups released 3.6 times more microplastics than PE-lined cups. The new study&#8217;s use of more advanced analytical methods, particularly the ability to detect nanoparticles, \u00a0accounts for the larger difference factor (12x vs 3.6x) and provides a more complete picture of total particle release.<\/p>\n<p>&nbsp;<\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>Conclusion<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">The University of Queensland study adds to growing evidence that biodegradable plastics can release significant quantities of micro- and nanoplastic particles during routine use. For the packaging industry, the practical implication is that material substitution decisions need to consider this as a potential implication alongside recyclability, compostability and migration compliance. As PLA continues to gain ground in the food service sector, driven by regulatory incentives and consumer expectations, the question of whether compostability at end-of-life is sufficient to define a material as &#8220;safe&#8221; during use is becoming harder to avoid.<\/p>\n<p style=\"text-align: justify;\"><em>Pack-Lab&#8217;s <\/em><a href=\"https:\/\/www.packlab.gr\/en\/sustainability\/\" target=\"_blank\" rel=\"noopener\"><em>sustainability consulting services<\/em><\/a><em> support producers navigating material substitution decisions, including the assessment of compostable and biodegradable alternatives against regulatory, performance and safety requirements.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A peer-reviewed study found that biodegradable PLA-lined cups release approximately 12 times more micro- and nanoplastic particles than conventional PE-lined cups when exposed to hot water, raising questions about material substitution decisions in food contact packaging.<\/p>\n","protected":false},"author":8,"featured_media":13527,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28,541],"tags":[],"class_list":["post-13531","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-en","category-industry-trends-reports-en","category-28","category-541","description-off"],"_links":{"self":[{"href":"https:\/\/www.packlab.gr\/en\/wp-json\/wp\/v2\/posts\/13531","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packlab.gr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.packlab.gr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.packlab.gr\/en\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.packlab.gr\/en\/wp-json\/wp\/v2\/comments?post=13531"}],"version-history":[{"count":3,"href":"https:\/\/www.packlab.gr\/en\/wp-json\/wp\/v2\/posts\/13531\/revisions"}],"predecessor-version":[{"id":13534,"href":"https:\/\/www.packlab.gr\/en\/wp-json\/wp\/v2\/posts\/13531\/revisions\/13534"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packlab.gr\/en\/wp-json\/wp\/v2\/media\/13527"}],"wp:attachment":[{"href":"https:\/\/www.packlab.gr\/en\/wp-json\/wp\/v2\/media?parent=13531"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.packlab.gr\/en\/wp-json\/wp\/v2\/categories?post=13531"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.packlab.gr\/en\/wp-json\/wp\/v2\/tags?post=13531"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}