{"id":5779,"date":"2024-09-11T11:58:40","date_gmt":"2024-09-11T09:58:40","guid":{"rendered":"https:\/\/ikv-aachen.de\/center-for-plastic-analysis-and-testing-kap\/practical-examples\/practical-examples-packaging\/"},"modified":"2025-01-20T13:55:24","modified_gmt":"2025-01-20T13:55:24","slug":"practical-examples-packaging","status":"publish","type":"page","link":"https:\/\/ikv-aachen.de\/en\/center-for-plastic-analysis-and-testing-kap\/practical-examples\/practical-examples-packaging\/","title":{"rendered":"Practical examples: Packaging"},"content":{"rendered":"<style type=\"text\/css\">\n    #page-headers-block_b101b8d6da4dbaa9ed8333659ce330ce  {\n        --gradientbackground: #00af69;\n        --gradientbackground: #00af69;\n        --gradientBackgroundLight: hsl(from #00af69 h calc(s * 0.8) calc(l * 1.3));\n        --gradientBackgroundLight2: hsl(from #00af69 h s calc(l * 1.5));\n            }\n<\/style>\n<section id=\"page-headers-block_b101b8d6da4dbaa9ed8333659ce330ce\" class=\" hyphens-auto  mb-base  md:mb-xl \">\n                <header class=\"theGrid14 grid-rows-auto-s-s overflow-hidden relative bg-white\">\n            <figure class=\"absolute col-span-all row-span-all w-full  opacity-40 blur-md scale-110 overflow-hidden pointer-events-none \"><img decoding=\"async\"  class=\"order-1 w-full h-full object-cover\"  src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/05\/Forschungsbereiche-Plasma-und-Oberflaechentechnik.jpg\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/05\/Forschungsbereiche-Plasma-und-Oberflaechentechnik.jpg 1500w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/05\/Forschungsbereiche-Plasma-und-Oberflaechentechnik-748x499.jpg 748w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/05\/Forschungsbereiche-Plasma-und-Oberflaechentechnik-768x512.jpg 768w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" width=\"1500\" height=\"1000\" alt=\"Verschiedene Verpackungen aus PET\" loading=\"lazy\" \/><\/figure>            <h1 data-left class=\"py-base  col-span-12 col-start-2 row-start-1 self-end md:col-span-6 md:col-start-2 z-10\">\n                <span class=\"text-blue pt-xs ikv-condensed block hyphens-none text-balance text-3xl font-bold pb-xs leading-none md:text-rigth\">\n                    Practical examples                  <\/span>\n                                    <span class=\"text-blue block hyphens-none text-balance font-serif text-base font-semibold md:text-rigth\">\n                        Industry: Packaging                    <\/span>\n                            <\/h1>\n            <figure class=\" contents \"><img decoding=\"async\"  class=\"col-span-full md:col-span-6 md:row-span-3 w-full h-full object-cover z-10\"  src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/05\/Forschungsbereiche-Plasma-und-Oberflaechentechnik.jpg\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/05\/Forschungsbereiche-Plasma-und-Oberflaechentechnik.jpg 1500w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/05\/Forschungsbereiche-Plasma-und-Oberflaechentechnik-748x499.jpg 748w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/05\/Forschungsbereiche-Plasma-und-Oberflaechentechnik-768x512.jpg 768w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" width=\"1500\" height=\"1000\" alt=\"Verschiedene Verpackungen aus PET\" loading=\"lazy\" \/><span class=\"text-blue md:pb-xs text-copyright col-start-2  col-span-3 row-span-1 row-start-3 pb-4 md:col-span-5 md:col-start-3 md:row-start-3 md:text-right xl:col-span-4 xl:col-start-4 xl:row-start-3 z-10\">&copy; DF.Fotografie<\/span><figcaption class=\"text-blue  text-figcaption col-span-9 row-span-1 row-start-3 text-right sm:col-span-8 sm:col-start-6 md:col-span-5 md:col-start-3 md:row-start-2 xl:col-span-4 xl:col-start-4 xl:row-start-2 mt-0 pb-xs md:pb-0 z-10\">Plastic packaging: Practical examples show how precise analyses improve shelf life and efficiency to ensure product safety and sustainability.<\/figcaption><\/figure>        <\/header>\n    \n                <\/section>\n\n<section id=\"toc-block_a14108cfd2391b49cc8b82ade3dc9c4d\" class=\"   py-xl  \">\n    <div class=\"theGridWrapper \">\n        <nav class=\"theGrid12 \">\n            <div class=\"relative\n            col-start-1 col-span-12\n            md:col-start-2 md:col-span-10\n            sm:before:block sm:before:bg-blue before:h-[1px] before:w-full before:absolute before:translate-y-[1.3em] before:-z-10\">\n                <h3 class=\"font-serif text-blue text-xl font-semibold sm:text-center\">\n                    <span class=\"inline-block bg-white sm:px-base\">\n                        Practical examples                    <\/span>\n                <\/h3>\n            <\/div>\n            <ul class=\"\n            col-start-1 col-span-12\n            sm:columns-2\n            md:col-start-2 md:col-span-10\n            md:columns-3\n            lg:col-start-3 lg:col-span-8\n            gap-x-xs gap-y-0\n            \">\n                                                        <li class=\"flex gap-x-[.2em]  text-blue font-thin text-base overflow-hidden  \">\n                        <div class=\"flex-[0_0_1.2em]\">\n                            <span class=\"material-symbols-outlined \"> fiber_manual_record <\/span>\n                        <\/div>\n                        <a href='#Returnable+PET+bottles' class='text-blue no-underline border-b-dashed translate-y-[.125em] block '>Returnable PET bottles<\/a>\n                    <\/li>\n                                                        <li class=\"flex gap-x-[.2em]  text-blue font-thin text-base overflow-hidden  \">\n                        <div class=\"flex-[0_0_1.2em]\">\n                            <span class=\"material-symbols-outlined \"> fiber_manual_record <\/span>\n                        <\/div>\n                        <a href='#Film+wrapping' class='text-blue no-underline border-b-dashed translate-y-[.125em] block '>Film wrapping<\/a>\n                    <\/li>\n                                                        <li class=\"flex gap-x-[.2em]  text-blue font-thin text-base overflow-hidden  \">\n                        <div class=\"flex-[0_0_1.2em]\">\n                            <span class=\"material-symbols-outlined \"> fiber_manual_record <\/span>\n                        <\/div>\n                        <a href='#Barrier+coating' class='text-blue no-underline border-b-dashed translate-y-[.125em] block '>Barrier coating<\/a>\n                    <\/li>\n                                                        <li class=\"flex gap-x-[.2em]  text-blue font-thin text-base overflow-hidden  \">\n                        <div class=\"flex-[0_0_1.2em]\">\n                            <span class=\"material-symbols-outlined \"> fiber_manual_record <\/span>\n                        <\/div>\n                        <a href='#Recyclate+processing' class='text-blue no-underline border-b-dashed translate-y-[.125em] block '>Recyclate processing<\/a>\n                    <\/li>\n                            <\/ul>\n        <\/nav>\n    <\/div>\n<\/section>\n<ul id=\"toc-menu\" class=\"flex flex-col\">\n    <!-- <li>\n        <a href=\"#toc-block_a14108cfd2391b49cc8b82ade3dc9c4d\" class=\"no-underline\">\n            <span class=\"material-symbols-outlined\"> toc <\/span>\n        <\/a>\n    <\/li> -->\n            <li class=\"group\/toc relative  align-middle \"><a href='#Returnable+PET+bottles' class='no-underline  block relative'><span class=\"material-symbols-outlined\"> fiber_manual_record <\/span><span class='none group-hover\/toc:grad-xl pointer-events-none absolute right-0 top-0 flex h-full w-[30ch] translate-x-base items-center justify-end text-balance pr-xl text-right text-base tracking-wide no-underline opacity-0 transition-all delay-0 duration-500 ease-in-out group-hover\/sidebar:pointer-events-auto group-hover\/toc:pointer-events-auto group-hover\/sidebar:-translate-x-0 group-hover\/toc:-translate-x-base group-hover\/sidebar:opacity-100 group-hover\/sidebar:delay-300 group-hover\/toc:delay-0\n    '>Returnable PET bottles<\/span><\/a><\/li>            <li class=\"group\/toc relative  align-middle \"><a href='#Film+wrapping' class='no-underline  block relative'><span class=\"material-symbols-outlined\"> fiber_manual_record <\/span><span class='none group-hover\/toc:grad-xl pointer-events-none absolute right-0 top-0 flex h-full w-[30ch] translate-x-base items-center justify-end text-balance pr-xl text-right text-base tracking-wide no-underline opacity-0 transition-all delay-0 duration-500 ease-in-out group-hover\/sidebar:pointer-events-auto group-hover\/toc:pointer-events-auto group-hover\/sidebar:-translate-x-0 group-hover\/toc:-translate-x-base group-hover\/sidebar:opacity-100 group-hover\/sidebar:delay-300 group-hover\/toc:delay-0\n    '>Film wrapping<\/span><\/a><\/li>            <li class=\"group\/toc relative  align-middle \"><a href='#Barrier+coating' class='no-underline  block relative'><span class=\"material-symbols-outlined\"> fiber_manual_record <\/span><span class='none group-hover\/toc:grad-xl pointer-events-none absolute right-0 top-0 flex h-full w-[30ch] translate-x-base items-center justify-end text-balance pr-xl text-right text-base tracking-wide no-underline opacity-0 transition-all delay-0 duration-500 ease-in-out group-hover\/sidebar:pointer-events-auto group-hover\/toc:pointer-events-auto group-hover\/sidebar:-translate-x-0 group-hover\/toc:-translate-x-base group-hover\/sidebar:opacity-100 group-hover\/sidebar:delay-300 group-hover\/toc:delay-0\n    '>Barrier coating<\/span><\/a><\/li>            <li class=\"group\/toc relative  align-middle \"><a href='#Recyclate+processing' class='no-underline  block relative'><span class=\"material-symbols-outlined\"> fiber_manual_record <\/span><span class='none group-hover\/toc:grad-xl pointer-events-none absolute right-0 top-0 flex h-full w-[30ch] translate-x-base items-center justify-end text-balance pr-xl text-right text-base tracking-wide no-underline opacity-0 transition-all delay-0 duration-500 ease-in-out group-hover\/sidebar:pointer-events-auto group-hover\/toc:pointer-events-auto group-hover\/sidebar:-translate-x-0 group-hover\/toc:-translate-x-base group-hover\/sidebar:opacity-100 group-hover\/sidebar:delay-300 group-hover\/toc:delay-0\n    '>Recyclate processing<\/span><\/a><\/li>    <\/ul>\n<a href=\"#toc-block_a14108cfd2391b49cc8b82ade3dc9c4d\" class=\"\n    z-20\n    lg:hidden\n    fixed\n    flex\n    items-center\n    justify-center\n    w-[2em]\n    h-[2em]\n\n    rounded-full\n    bottom-m\n    right-m\n    bg-white\n    text-blue\n\n    no-underline\n    scale-125\n    shadow-md\n    \">\n    <span class=\"material-symbols-outlined !translate-y-[0] scale-125 \"> list <\/span>\n<\/a>\n\n<script>\n    var elementToMove = document.querySelector('#toc-menu');\n    var newParent = document.querySelector('#toc-wrapper');\n    newParent.appendChild(elementToMove);\n<\/script>\n\n\n<a id=\"toc-marker-block_b9d2fec98757700ff8c07222b885be54\" class=\"toc-marker -top-[--toc-height] \" name=\"Returnable+PET+bottles\" data-tocmarker=\"Returnable+PET+bottles\"><\/a>\n\n    <section id=\"headline-block_beee6f9a6161a3a6ac1e3f5924ffc80f\" class=\"block-headline   bg-blue\">\n        <div class=\"theGridWrapper hyphens-auto\">\n            <div class=\"theGrid12\">\n                <div class=\"\n                col-span-10\n                col-start-2\n                xl:col-span-9\n                xl:col-start-3\n                text-4xl\npy-8\n                \">\n                    <div class=\"\n                    \">\n                        <h3 class=\" leading-none text-green \">\n                            Cracking                        <\/h3>\n                                                    <h3 class=\"pt-4 font-semibold  text-white  leading-none\">\n                                of returnable PET bottles                            <\/h3>\n                                            <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/section>\n\n\n<section id=\"two-columns-block_a099df0c8bb2ed34a3e9dabda9859113\" class=\"block-two-columns blocksection \">\n    <div class=\"theGridWrapper\">\n        <div class=\"theGrid12\">\n            <div class=\"wysiwyg\n            relative\n\n            col-start-1\n            col-span-12\n\n            md:col-start-3\n            md:col-span-9\n            md:gap-8\n\n            lg:col-start-3\n            lg:col-span-8\n\n            2xl:col-start-2\n            2xl:col-span-9\n\n            2xl:gap-[7rem]\n\n            sm:columns-2\n            hyphens-auto \n            sm:after:content-['\\00A0']\n            sm:after:block\n            sm:after:h-3xl\n            \">\n                <figure id=\"attachment_2746\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2746\" src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/IKV-KAP-Praxisbeispiel-Rissbildung-an-PET.jpg\" alt=\"\" width=\"847\" height=\"413\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/IKV-KAP-Praxisbeispiel-Rissbildung-an-PET.jpg 847w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/IKV-KAP-Praxisbeispiel-Rissbildung-an-PET-748x365.jpg 748w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/IKV-KAP-Praxisbeispiel-Rissbildung-an-PET-768x374.jpg 768w\" sizes=\"auto, (max-width: 847px) 100vw, 847px\" \/><figcaption class=\"wp-caption-text\">FESEM analysis in the damage area of the PET bottle <i>IKV<\/i><\/figcaption><\/figure>\n<h3>Problem: Cracking of returnable PET bottles<\/h3>\n<p>Reusable PET bottles typically go through twenty or more <b>usage cycles<\/b>. During washing, filling, transportation, storage and actual use by the consumer, the bottles are subject to a load spectrum that is individual to each bottle. In an increasing number of cases of damage, consumers have complained about <b>leaks in the thread area<\/b> of returnable PET bottles of a certain type.  <\/p>\n<h3>Methodology: readjustment tests and microscopic analysis (LIM \/ FESEM)<\/h3>\n<ul>\n<li>Adjustment tests for the purpose of life cycle simulation.<\/li>\n<li>The test bottles were marked and washed, filled, capped and emptied in a total of 10 cycles in running filling lines.<\/li>\n<li>Comparative microscopic examinations to detect possible crack formation depending on the filling cycles previously completed<\/li>\n<\/ul>\n<hr>\n<h3>Result: Effect overlay in the thread area<\/h3>\n<p>As the number of wash cycles increased, an increase in visible cracks in the thread area was observed. The cracks were initiated on the outside of the bottle. However, these cracks do not occur in every reusable bottle: A correlation between crack formation and closure design used could be established. Microscopic methods were used to detect traces of <b>chemical material attack<\/b> on the thread surface. It can be assumed that this is the <b>effect of the washing suds used <\/b>. Furthermore, processing-related orientations \/ stresses were found in the thread area of the bottles. The cracks are caused by a load collective of tensile \/ bending stresses in the thread area, which are caused by the prevailing internal bottle pressure and the closure design used. The medial load from the wash liquor multiplies the effect of the mechanical loads.       <\/p>\n    <article itemscope itemtype=\"http:\/\/schema.org\/Person\" class=\" border-t border-green border-dotted pt-base mt-base\">\n        <figure class=\" dn_no_select  rounded-full  w-[10em] h-auto object-cov overflow-hidden mb-base bigInMiddle\"><img decoding=\"async\"  class=\"dn-no-drag w-full h-auto object-cover\"  src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/05\/Christoph-Zekorn.jpg\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/05\/Christoph-Zekorn.jpg 1080w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/05\/Christoph-Zekorn-748x748.jpg 748w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/05\/Christoph-Zekorn-335x335.jpg 335w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/05\/Christoph-Zekorn-768x768.jpg 768w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" width=\"1080\" height=\"1080\" alt=\"Christoph-Zekorn\" loading=\"lazy\" \/><\/figure>        <h2 itemprop='name' class=\"font-bold\">\n             Christoph Zekorn        <\/h2>\n                    <p itemprop='jobTitle' class=\"\">\n                Head of the Microscopic Analysis Laboratory            <\/p>\n                            <div>\n                <h3 class=\"mt-2xs\">Kontakt:<\/h3>\n                <p>\n                    <span itemprop=\"telephone\">+49 241 80-28341<\/span><br>\n                <\/p>\n                <a href=\"mailto:christoph.zekorn@ikv.rwth-aachen.de\" itemprop=\"email\">christoph.zekorn@ikv.rwth-aachen.de<\/a>\n            <\/div>\n                <ul class=\"flex gap-xs mt-xs\">\n            <li>\n                    <a data-con-tap href=\"tel:+49 241 80-28341\" class=\"text-[1.5em] w-[1.5em] h-[1.5em] flex justify-center  no-underline relative items-center text-white hover:scale-110 transform transition-all duration-200 ease-in-out bg-green   hover:bg-blue  rounded-full   \"  data-content='+49 241 80-28341'  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16.349349,10 C19.8566406,10 22.6970052,12.8643566 22.6970052,16.3970067 C22.6970052,19.9296567 19.8566406,22.7940133 16.349349,22.7940133 Z M11.0325521,62 L21.769401,62 L21.769401,27.3333333 L11.0325521,27.3333333 L11.0325521,62 Z\" fill=\"white\" \/>\n    <\/g>\n<\/svg>\n            <\/a>\n                <\/li>\n                        <li>\n                    <a data-con-tap href=\"\/vcard\/?id=1594\" class=\"text-[1.5em] w-[1.5em] h-[1.5em] flex justify-center  no-underline relative items-center text-white hover:scale-110 transform transition-all duration-200 ease-in-out bg-green   hover:bg-blue  rounded-full   \"  data-content='\/vcard\/?id=1594'  download  target=\"_self\">\n                    <span class='material-symbols-outlined -mt-2'> download <\/span>\n                    <\/a>\n            <\/li>\n        <\/ul>\n    <\/article>\n\n            <\/div>\n        <\/div>\n    <\/div>\n<\/section>\n\n\n<a id=\"toc-marker-block_cd9d7201200b68191fe4bd27895c020f\" class=\"toc-marker -top-[--toc-height] \" name=\"Film+wrapping\" data-tocmarker=\"Film+wrapping\"><\/a>\n\n    <section id=\"headline-block_12d44d3c930297b73f2368fd3c3e8c1a\" class=\"block-headline   bg-blue\">\n        <div class=\"theGridWrapper hyphens-auto\">\n            <div class=\"theGrid12\">\n                <div class=\"\n                col-span-10\n                col-start-2\n                xl:col-span-9\n                xl:col-start-3\n                text-4xl\npy-8\n                \">\n                    <div class=\"\n                    \">\n                        <h3 class=\" leading-none text-green \">\n                            Damage analysis on                        <\/h3>\n                                                    <h3 class=\"pt-4 font-semibold  text-white  leading-none\">\n                                film outer packaging for drinks bottles                            <\/h3>\n                                            <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/section>\n\n\n<section id=\"two-columns-block_7f7b288494ec6fb7558e504cd44bae8a\" class=\"block-two-columns blocksection \">\n    <div class=\"theGridWrapper\">\n        <div class=\"theGrid12\">\n            <div class=\"wysiwyg\n            relative\n\n            col-start-1\n            col-span-12\n\n            md:col-start-3\n            md:col-span-9\n            md:gap-8\n\n            lg:col-start-3\n            lg:col-span-8\n\n            2xl:col-start-2\n            2xl:col-span-9\n\n            2xl:gap-[7rem]\n\n            sm:columns-2\n            hyphens-auto \n            sm:after:content-['\\00A0']\n            sm:after:block\n            sm:after:h-3xl\n            \">\n                <figure id=\"attachment_2781\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2781\" src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/KAP-Praxisbeispiel-Folienumverpackung.jpg\" alt=\"\" width=\"350\" height=\"262\" \/><figcaption class=\"wp-caption-text\">Dot matrix on PET outer packaging shows deformation pattern after partial tear-off.<\/figcaption><\/figure>\n<h3>Problem: Failure of the carrying device for six-pack outer packaging<\/h3>\n<p>Six-packs, in which six PET bottles are repackaged using a shrink film, are fitted with a glued-on carrying strap for larger containers. Sometimes the carrying device fails. The damage usually indicates either poor bonding or insufficient strength of the shrink film. In the present case, the chronological sequence of customer complaints gives the impression that only a few batches are affected, which also only have a certain percentage of defective carrying devices.<\/p>\n<h3>Analysis method: Tensile test and optical measurement<\/h3>\n<p>In order to counter these uncertainties and to be able to describe the failure behavior qualitatively and quantitatively, the deformation pattern of a bottle outer packaging during lifting and transport is determined using a tensile testing machine and a device adapted to the real load situation. Using a pinhole aperture, a dot pattern is sprayed onto the film with a non-dissolving paint. This prepared film packaging is then subjected to a practical tensile load on a universal testing machine. During the test, the deformation of the film is recorded with an optical measuring system in addition to the force. The optical measuring systems used here offer significant advantages over other methods when determining deformation.<\/p>\n<hr \/>\n<p>Mechanical transducers are difficult to mount on film structures and applied strain gauges distort the measurement result due to their inherent stiffness. Optical, non-contact systems, on the other hand, ensure that disturbances to the system to be characterised are minimised. Using the test set-up, the forces acting can be related to the deformation of the film packaging. In addition to the effective force lines, a measure of the level of film stretch can also be determined approximately.<\/p>\n<p>&nbsp;<\/p>\n<h3>Result: Practical findings on displacement and elongation<\/h3>\n<figure id=\"attachment_2779\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2779\" src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/KAP-Praxisbeispiel-Folienumverpackung-2.jpg\" alt=\"\" width=\"350\" height=\"262\" \/><figcaption class=\"wp-caption-text\">Test setup for testing six-pack outer packaging <i>IKV<\/i><\/figcaption><\/figure>\n<p>The investigations using optical measurement provide important insights into the displacements and elongations of the film that can occur during normal handling. They also provide information about the failure process of the outer packaging. On this basis, improvement measures can be developed and specifications for the film and the bonding can be drawn up.<\/p>\n    <article itemscope itemtype=\"http:\/\/schema.org\/Person\" class=\" border-t border-green border-dotted pt-base mt-base\">\n        <figure class=\" dn_no_select  rounded-full  w-[10em] h-auto object-cov overflow-hidden mb-base bigInMiddle\"><img decoding=\"async\"  class=\"dn-no-drag w-full h-auto object-cover\"  src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/12\/Tobias-Conen-Square-scaled.jpg\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/12\/Tobias-Conen-Square-scaled.jpg 2560w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/12\/Tobias-Conen-Square-748x748.jpg 748w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/12\/Tobias-Conen-Square-1536x1536.jpg 1536w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/12\/Tobias-Conen-Square-335x335.jpg 335w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/12\/Tobias-Conen-Square-768x768.jpg 768w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/12\/Tobias-Conen-Square-2048x2048.jpg 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" width=\"2560\" height=\"2560\" alt=\"Tobias-Conen-Square\" loading=\"lazy\" \/><\/figure>        <h2 itemprop='name' class=\"font-bold\">\n             Tobias Conen, M. Sc.        <\/h2>\n                    <p itemprop='jobTitle' class=\"\">\n                Head of the Mechanical Testing Lab            <\/p>\n                            <div>\n                <h3 class=\"mt-2xs\">Kontakt:<\/h3>\n                <p>\n                    <span itemprop=\"telephone\">+49 241 80-28345<\/span><br>\n                <\/p>\n                <a href=\"mailto:tobias.conen@ikv.rwth-aachen.de\" itemprop=\"email\">tobias.conen@ikv.rwth-aachen.de<\/a>\n            <\/div>\n                <ul class=\"flex gap-xs mt-xs\">\n            <li>\n                    <a data-con-tap href=\"tel:+49 241 80-28345\" class=\"text-[1.5em] w-[1.5em] h-[1.5em] flex justify-center  no-underline relative items-center text-white hover:scale-110 transform transition-all duration-200 ease-in-out bg-green   hover:bg-blue  rounded-full   \"  data-content='+49 241 80-28345'  data-content-type='phone'  data-copy='The number has been copied to your device clipboard.'  target=\"_self\">\n                    <span class='material-symbols-outlined -mt-2'> phone <\/span>\n                    <\/a>\n            <\/li>\n            <li>\n                    <a data-con-tap href=\"mailto:tobias.conen@ikv.rwth-aachen.de\" class=\"text-[1.5em] w-[1.5em] h-[1.5em] flex justify-center  no-underline relative items-center text-white hover:scale-110 transform transition-all duration-200 ease-in-out bg-green   hover:bg-blue  rounded-full   \"  data-content='tobias.conen@ikv.rwth-aachen.de'  data-content-type='mail'  target=\"_self\">\n                    <span class='material-symbols-outlined -mt-2'> mail <\/span>\n                    <\/a>\n            <\/li>\n                        <li>\n                    <a data-con-tap href=\"\/vcard\/?id=1570\" class=\"text-[1.5em] w-[1.5em] h-[1.5em] flex justify-center  no-underline relative items-center text-white hover:scale-110 transform transition-all duration-200 ease-in-out bg-green   hover:bg-blue  rounded-full   \"  data-content='\/vcard\/?id=1570'  download  target=\"_self\">\n                    <span class='material-symbols-outlined -mt-2'> download <\/span>\n                    <\/a>\n            <\/li>\n        <\/ul>\n    <\/article>\n\n            <\/div>\n        <\/div>\n    <\/div>\n<\/section>\n\n\n<a id=\"toc-marker-block_239aa6c52423c4533b4117a597ffae4e\" class=\"toc-marker -top-[--toc-height] \" name=\"Barrier+coating\" data-tocmarker=\"Barrier+coating\"><\/a>\n\n    <section id=\"headline-block_dd7f4e34d6cf926376c83754db0474b3\" class=\"block-headline   bg-blue\">\n        <div class=\"theGridWrapper hyphens-auto\">\n            <div class=\"theGrid12\">\n                <div class=\"\n                col-span-10\n                col-start-2\n                xl:col-span-9\n                xl:col-start-3\n                text-4xl\npy-8\n                \">\n                    <div class=\"\n                    \">\n                        <h3 class=\" leading-none text-green \">\n                            Quality assurance                        <\/h3>\n                                                    <h3 class=\"pt-4 font-semibold  text-white  leading-none\">\n                                for barrier coatings on yoghurt cups                            <\/h3>\n                                            <\/div>\n                <\/div>\n            <\/div>\n        <\/div>\n    <\/section>\n\n\n<section id=\"two-columns-block_fe804b2deb3bb8631b8de9eb5e9e658f\" class=\"block-two-columns blocksection \">\n    <div class=\"theGridWrapper\">\n        <div class=\"theGrid12\">\n            <div class=\"wysiwyg\n            relative\n\n            col-start-1\n            col-span-12\n\n            md:col-start-3\n            md:col-span-9\n            md:gap-8\n\n            lg:col-start-3\n            lg:col-span-8\n\n            2xl:col-start-2\n            2xl:col-span-9\n\n            2xl:gap-[7rem]\n\n            sm:columns-2\n            hyphens-auto \n            sm:after:content-['\\00A0']\n            sm:after:block\n            sm:after:h-3xl\n            \">\n                <figure id=\"attachment_2734\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2734\" src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/IKV-KAP-Praxisbeispiel-PET-Barrierebeschichtung.jpg\" alt=\"\" width=\"847\" height=\"516\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/IKV-KAP-Praxisbeispiel-PET-Barrierebeschichtung.jpg 847w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/IKV-KAP-Praxisbeispiel-PET-Barrierebeschichtung-748x456.jpg 748w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/IKV-KAP-Praxisbeispiel-PET-Barrierebeschichtung-768x468.jpg 768w\" sizes=\"auto, (max-width: 847px) 100vw, 847px\" \/><figcaption class=\"wp-caption-text\">Internal coating of hollow bodies <i>IKV<\/i><\/figcaption><\/figure>\n<h3>Problem: Determining the quality of SiOx barrier coatings for cups<\/h3>\n<p>Packaged food must often not oxidise and the water content must not change in order to keep the product edible. The penetration of oxygen and moisture also enables the growth of bacteria and mold and thus leads to spoilage of the packaged product. <b>Plasmapoylmerisation <\/b>can be used to provide plastic packaging, which otherwise only has a low barrier effect, with a <b>coating with a high barrier effect<\/b> (often <sub>SiOx<\/sub> layers). The manufacturer of the plastic cups has the coatings applied by a third-party company, but has no way of <b>evaluating the quality of the applied coatings<\/b>. Due to the transparency and low layer thickness of the coatings of just a few tens of nanometers, the coatings cannot be visually inspected.<\/p>\n<h3>Methodology: layer detection and characterisation<\/h3>\n<ul>\n<li>Rapid test for layer detection with infrared spectroscopy.<\/li>\n<li>Coating adhesion measurements using an adhesion analyzer and comparison with empirical values from the IKV for this type of coating.<\/li>\n<li>Coating of identical cups in the IKV to form a reference.<\/li>\n<li>Comparison of the barrier improvements achieved.<\/li>\n<\/ul>\n<h3>Result: Sufficient quality of the supplier&#8217;s coatings confirmed<\/h3>\n<figure id=\"attachment_2655\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2655\" src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/Praxisbeispiel-KAP-PET-Barrierebeschichtung-.jpg\" alt=\"\" width=\"800\" height=\"483\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/Praxisbeispiel-KAP-PET-Barrierebeschichtung-.jpg 800w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/Praxisbeispiel-KAP-PET-Barrierebeschichtung--748x452.jpg 748w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/Praxisbeispiel-KAP-PET-Barrierebeschichtung--768x464.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-caption-text\">Comparison of IR spectra for the detection of plasma-polymerised coatings <i>IKV<\/i><\/figcaption><\/figure>\n<p>A <b><sub>SiOx<\/sub> coating<\/b> can be detected on all samples supplied using the rapid test. The coating adhesion measurements showed <b>sufficient values<\/b> for the application. The <b>barrier improvements <\/b>achieved with the supplier&#8217;s coatings are almost in the same range as those that can be achieved with the coatings developed at IKV.<\/p>\n<p>&nbsp;<\/p>\n    <article itemscope itemtype=\"http:\/\/schema.org\/Person\" class=\" border-t border-green border-dotted pt-base mt-base\">\n        <figure class=\" dn_no_select  rounded-full  w-[10em] h-auto object-cov overflow-hidden mb-base bigInMiddle\"><img decoding=\"async\"  class=\"dn-no-drag w-full h-auto object-cover\"  src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/07\/sabine-standfuss-holthausen-square-scaled.jpg\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/07\/sabine-standfuss-holthausen-square-scaled.jpg 2560w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/07\/sabine-standfuss-holthausen-square-748x748.jpg 748w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/07\/sabine-standfuss-holthausen-square-1536x1536.jpg 1536w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/07\/sabine-standfuss-holthausen-square-335x335.jpg 335w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/07\/sabine-standfuss-holthausen-square-768x768.jpg 768w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/07\/sabine-standfuss-holthausen-square-2048x2048.jpg 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" width=\"2560\" height=\"2560\" alt=\"sabine-standfu\u00df-holthausen-square\" loading=\"lazy\" \/><\/figure>        <h2 itemprop='name' class=\"font-bold\">\n            Dr. rer. nat. Sabine Standfu\u00df-Holthausen        <\/h2>\n                    <p itemprop='jobTitle' class=\"\">\n                Head of the Spectroscopic Analysis Laboratory            <\/p>\n                            <div>\n                <h3 class=\"mt-2xs\">Kontakt:<\/h3>\n                <p>\n                    <span itemprop=\"telephone\">+49 241 80-27319<\/span><br>\n                <\/p>\n                <a href=\"mailto:sabine.standfuss-holthausen@ikv.rwth-aachen.de\" itemprop=\"email\">sabine.standfuss-holthausen@ikv.rwth-aachen.de<\/a>\n            <\/div>\n                <ul class=\"flex gap-xs mt-xs\">\n            <li>\n                    <a data-con-tap href=\"tel:+49 241 80-27319\" class=\"text-[1.5em] w-[1.5em] h-[1.5em] flex justify-center  no-underline relative items-center text-white hover:scale-110 transform transition-all duration-200 ease-in-out bg-green   hover:bg-blue  rounded-full   \"  data-content='+49 241 80-27319'  data-content-type='phone'  data-copy='The number has been copied to your device clipboard.'  target=\"_self\">\n                    <span class='material-symbols-outlined -mt-2'> phone <\/span>\n                    <\/a>\n            <\/li>\n            <li>\n                    <a data-con-tap href=\"mailto:sabine.standfuss-holthausen@ikv.rwth-aachen.de\" class=\"text-[1.5em] w-[1.5em] h-[1.5em] flex justify-center  no-underline relative items-center text-white hover:scale-110 transform transition-all duration-200 ease-in-out bg-green   hover:bg-blue  rounded-full   \"  data-content='sabine.standfuss-holthausen@ikv.rwth-aachen.de'  data-content-type='mail'  target=\"_self\">\n                    <span class='material-symbols-outlined -mt-2'> mail <\/span>\n                    <\/a>\n            <\/li>\n                        <li>\n                    <a data-con-tap href=\"\/vcard\/?id=2067\" class=\"text-[1.5em] w-[1.5em] h-[1.5em] flex justify-center  no-underline relative items-center text-white hover:scale-110 transform transition-all duration-200 ease-in-out bg-green   hover:bg-blue  rounded-full   \"  data-content='\/vcard\/?id=2067'  download  target=\"_self\">\n                    <span class='material-symbols-outlined -mt-2'> download <\/span>\n                    <\/a>\n            <\/li>\n        <\/ul>\n    <\/article>\n\n            <\/div>\n        <\/div>\n    <\/div>\n<\/section>\n\n\n<a id=\"toc-marker-block_7e08c8efe9c3d97a920430b2f6926fbb\" class=\"toc-marker -top-[--toc-height] \" name=\"Recyclate+processing\" data-tocmarker=\"Recyclate+processing\"><\/a>\n\n    <section id=\"headline-block_9f5de4f38673b61ededf59e65dbc3e16\" class=\"block-headline  \">\n        <div class=\"theGridWrapper hyphens-auto\">\n            <div class=\"theGrid12\">\n                <div class=\"\n                col-start-1\n                col-span-12\n                md:col-span-7\n                md:col-start-2\n                2xl:col-span-7\n                2xl:col-start-1\n                text-balance\n                \">\n                    <h2 class=\"text-blue font-thin text-3xl text-balance\">\n                        Reprocessing                      <\/h2>\n                                            <h3 class=\"font-serif  font-normal   text-green  text-lg text-balance mt-3xs   leading-tight \">\n                            from post-consumer polypropylene                        <\/h3>\n                                    <\/div>\n            <\/div>\n        <\/div>\n    <\/section>\n\n\n<section id=\"two-columns-block_fda1a8801a9b5926cadadf021f61fd45\" class=\"block-two-columns blocksection \">\n    <div class=\"theGridWrapper\">\n        <div class=\"theGrid12\">\n            <div class=\"wysiwyg\n            relative\n\n            col-start-1\n            col-span-12\n\n            md:col-start-3\n            md:col-span-9\n            md:gap-8\n\n            lg:col-start-3\n            lg:col-span-8\n\n            2xl:col-start-2\n            2xl:col-span-9\n\n            2xl:gap-[7rem]\n\n            sm:columns-2\n            hyphens-auto \n            sm:after:content-['\\00A0']\n            sm:after:block\n            sm:after:h-3xl\n            \">\n                <figure id=\"attachment_2902\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2902\" src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/Praxisbeispiel-KAP-Rezyklate-verarbeiten.jpg\" alt=\"\" width=\"800\" height=\"534\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/Praxisbeispiel-KAP-Rezyklate-verarbeiten.jpg 800w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/Praxisbeispiel-KAP-Rezyklate-verarbeiten-748x499.jpg 748w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/09\/Praxisbeispiel-KAP-Rezyklate-verarbeiten-768x513.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-caption-text\">Impurities in the melt filter <i>IKV<\/i><\/figcaption><\/figure>\n<h3>Problem: Reprocessing of recyclates<\/h3>\n<p>When using recyclate of uncertain origin, the purity content is often unclear. This uncertainty can be minimised, but not completely eliminated, by using a targeted method for structural characterisation of the material. During the processing of post-consumer polypropylene (PP), production stoppages occurred at short intervals. The cause was clogging of the melt filter. The random analysis of the starting material using infrared spectroscopy was unremarkable.<\/p>\n<h3>Methodology: Combination of morphological, spectroscopic and thermal methods<\/h3>\n<ul>\n<li>Morphological characterisation of the added sieve (thin section): Impurities in the form of non-plasticised particles<\/li>\n<li>Infrared spectroscopic analysis of these particles: Polyethylene in polypropylene<\/li>\n<li>Astonishing result: The melting temperature of PE is far below that of PP.<\/li>\n<li>Consequently, the PE particles should be plasticizable.<\/li>\n<li>Thermal analysis of the particles using DSC: the resulting melting temperature (Tm = 135 \u00b0C) confirmed the result of the IR spectroscopy. Melting enthalpy was low.<\/li>\n<\/ul>\n<h3>Result: PE cross-linked and not plasticizable<\/h3>\n<p>The very low melt enthalpy suggests that the PE is cross-linked. As a result, it was not plasticizable and clogged the melt filter. Based on these results, the source of the contamination in the recycling chain can be specifically identified and the source of the fault eliminated.<\/p>\n<figure id=\"attachment_3183\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3183\" src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/10\/IKV-KAP-Praxisbeispiel-Rezyklat-IR-Analyse.jpg\" alt=\"\" width=\"800\" height=\"534\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/10\/IKV-KAP-Praxisbeispiel-Rezyklat-IR-Analyse.jpg 800w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/10\/IKV-KAP-Praxisbeispiel-Rezyklat-IR-Analyse-748x499.jpg 748w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2024\/10\/IKV-KAP-Praxisbeispiel-Rezyklat-IR-Analyse-768x513.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-caption-text\">IR analysis of the particles in the melt filter <i>IKV<\/i><\/figcaption><\/figure>\n<p>If the material chasacterization of recyclate is carried out too one-sidedly or unsustainably, this can lead to considerable problems during processing. This example shows why a combination of spectroscopic and thermal analyses is fundamentally useful.<\/p>\n    <article itemscope itemtype=\"http:\/\/schema.org\/Person\" class=\" border-t border-green border-dotted pt-base mt-base\">\n        <figure class=\" dn_no_select  rounded-full  w-[10em] h-auto object-cov overflow-hidden mb-base bigInMiddle\"><img decoding=\"async\"  class=\"dn-no-drag w-full h-auto object-cover\"  src=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/07\/sabine-standfuss-holthausen-square-scaled.jpg\" srcset=\"https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/07\/sabine-standfuss-holthausen-square-scaled.jpg 2560w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/07\/sabine-standfuss-holthausen-square-748x748.jpg 748w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/07\/sabine-standfuss-holthausen-square-1536x1536.jpg 1536w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/07\/sabine-standfuss-holthausen-square-335x335.jpg 335w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/07\/sabine-standfuss-holthausen-square-768x768.jpg 768w, https:\/\/ikv-aachen.de\/wp-content\/uploads\/2026\/07\/sabine-standfuss-holthausen-square-2048x2048.jpg 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" width=\"2560\" height=\"2560\" alt=\"sabine-standfu\u00df-holthausen-square\" loading=\"lazy\" \/><\/figure>        <h2 itemprop='name' class=\"font-bold\">\n            Dr. rer. nat. Sabine Standfu\u00df-Holthausen        <\/h2>\n                    <p itemprop='jobTitle' class=\"\">\n                Head of the Spectroscopic Analysis Laboratory            <\/p>\n                            <div>\n                <h3 class=\"mt-2xs\">Kontakt:<\/h3>\n                <p>\n                    <span itemprop=\"telephone\">+49 241 80-27319<\/span><br>\n                <\/p>\n                <a href=\"mailto:sabine.standfuss-holthausen@ikv.rwth-aachen.de\" itemprop=\"email\">sabine.standfuss-holthausen@ikv.rwth-aachen.de<\/a>\n            <\/div>\n                <ul class=\"flex gap-xs mt-xs\">\n            <li>\n                    <a data-con-tap href=\"tel:+49 241 80-27319\" class=\"text-[1.5em] w-[1.5em] h-[1.5em] flex justify-center  no-underline relative items-center text-white hover:scale-110 transform transition-all duration-200 ease-in-out bg-green   hover:bg-blue  rounded-full   \"  data-content='+49 241 80-27319'  data-content-type='phone'  data-copy='The number has been copied to your device clipboard.'  target=\"_self\">\n                    <span class='material-symbols-outlined -mt-2'> phone <\/span>\n                    <\/a>\n            <\/li>\n            <li>\n                    <a data-con-tap href=\"mailto:sabine.standfuss-holthausen@ikv.rwth-aachen.de\" class=\"text-[1.5em] w-[1.5em] h-[1.5em] flex justify-center  no-underline relative items-center text-white hover:scale-110 transform transition-all duration-200 ease-in-out bg-green   hover:bg-blue  rounded-full   \"  data-content='sabine.standfuss-holthausen@ikv.rwth-aachen.de'  data-content-type='mail'  target=\"_self\">\n                    <span class='material-symbols-outlined -mt-2'> mail <\/span>\n                    <\/a>\n            <\/li>\n                        <li>\n                    <a data-con-tap href=\"\/vcard\/?id=2067\" class=\"text-[1.5em] w-[1.5em] h-[1.5em] flex justify-center  no-underline relative items-center text-white hover:scale-110 transform transition-all duration-200 ease-in-out bg-green   hover:bg-blue  rounded-full   \"  data-content='\/vcard\/?id=2067'  download  target=\"_self\">\n                    <span class='material-symbols-outlined -mt-2'> download <\/span>\n                    <\/a>\n            <\/li>\n        <\/ul>\n    <\/article>\n\n            <\/div>\n        <\/div>\n    <\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Plastic packaging: Practical examples show how precise analyses improve shelf life and efficiency to ensure product safety and sustainability.<\/p>\n","protected":false},"author":3,"featured_media":1706,"parent":5775,"menu_order":40,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":true,"footnotes":""},"class_list":["post-5779","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Practical examples: Packaging | IKV-Aachen<\/title>\n<meta name=\"description\" content=\"Discover the methodology we use. 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