{"id":2102,"date":"2026-05-24T00:22:10","date_gmt":"2026-05-23T22:22:10","guid":{"rendered":"https:\/\/kablonex.pl\/bez-kategorii\/multilayer-extrusion-how-3-and-5-layers-change-film-properties\/"},"modified":"2026-10-02T09:19:18","modified_gmt":"2026-10-02T07:19:18","slug":"multilayer-extrusion-how-3-and-5-layers-change-film-properties","status":"publish","type":"post","link":"https:\/\/kablonex.pl\/en\/news\/multilayer-extrusion-how-3-and-5-layers-change-film-properties\/","title":{"rendered":"Multilayer Extrusion \u2014 How 3 and 5 Layers Change Film Properties"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>Introduction<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">W ostatnich 25 latach bran\u017ca <a href=\"https:\/\/kablonex.pl\/en\/products\/nex-pack\/\">folii opakowaniowych<\/a> przesz\u0142a technologiczn\u0105 rewolucj\u0119: od folii mono warstwowej, przez konstrukcje 3-warstwowe, po dzi\u015b ju\u017c niemal standardowe uk\u0142ady 5-warstwowe. W Kablonex obie te technologie pracuj\u0105 u nas r\u00f3wnolegle &#8211; bo ka\u017cda ma swoje miejsce, swojego klienta i swoj\u0105 ekonomi\u0119.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In this article, I will break this down. Specifically, from a business perspective, without marketing fluff. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What you will read about:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>What exactly is multilayer extrusion and why it&#8217;s not a &#8220;one-pot blend&#8221;<\/li>\n\n\n\n<li>What real benefits come from transitioning from monolayer to 3 layers \u2014 and what research says about the limits of this technology<\/li>\n\n\n\n<li>Why 5 layers represent a qualitative leap, not just &#8220;two more layers&#8221;<\/li>\n\n\n\n<li>When 3 layers are optimal, and when you need 5 \u2014 from the perspective of total cost, not film price<\/li>\n\n\n\n<li>How this choice impacts recycling, ESG, and compliance with PPWR<\/li>\n\n\n\n<li>What this means in practice for your packaging line<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>1. Ekstruzja wielowarstwowa &#8211; co to w\u0142a\u015bciwie jest<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Wielu klient\u00f3w my\u015bli o folii wielowarstwowej jak o \u201ecie\u015bcie francuskim&#8221; &#8211; kilka warstw foliowych sklejonych ze sob\u0105. To b\u0142\u0105d.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the blown film co-extrusion process, each layer <strong>is formed simultaneously<\/strong>, at the same moment, in a single die head. We have several separate extruders, each processing a different raw material (or blend), and the molten polymer streams only combine in the die head, forming a single coherent structure. Blowing and cooling occur in the final, multilayer configuration.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is a crucial difference:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Feature<\/strong><\/th><th><strong>Lamination<\/strong><\/th><th><strong>Multilayer Co-extrusion<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Method of layer bonding<\/td><td>Adhesive \/ lacquer<\/td><td>Polymer melt in the die head<\/td><\/tr><tr><td>Number of processes<\/td><td>2+ (first films, then bonding)<\/td><td>1 (all in one step)<\/td><\/tr><tr><td>Layer cohesion<\/td><td>Mechanical (adhesive)<\/td><td>Intermolecular<\/td><\/tr><tr><td>Risk of delamination<\/td><td>Higher<\/td><td>Practically zero<\/td><\/tr><tr><td>Recycling<\/td><td>Difficult (different materials + adhesive)<\/td><td>Possible (mono-material PE)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">At Kablonex, we work with <strong>1\u20135 layers, thicknesses from 16\u2013250 \u00b5m, and widths up to 3,000 mm<\/strong> \u2014 which gives us full structural flexibility within a single technology.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>2. Why 3 Layers Changed the Industry<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Blown film co-extrusion appeared commercially in the late 1960s (Dow launched its first 3-layer lines for Oscar Mayer in 1967 for bacon packaging), and over the next two to three decades, it became a market standard. For the flexible packaging industry, this was the first real structural revolution \u2014 it allowed manufacturers to <strong>separate functions<\/strong> into different film layers instead of seeking a compromise in a single formulation.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">W Polsce ten skok technologiczny dokonywa\u0142 si\u0119 z op\u00f3\u017anieniem wzgl\u0119dem zachodnich lider\u00f3w. W Kablonex pierwsza linia do produkcji folii 3-warstwowej wesz\u0142a na hal\u0119 produkcyjn\u0105 pod koniec lat 90., otwieraj\u0105c firm\u0119 na zaawansowane segmenty opakowa\u0144. Linia 5-warstwowa pojawi\u0142a si\u0119 dopiero po 2010 roku \u2014 r\u00f3wnolegle z uruchomieniem <a href=\"https:\/\/kablonex.pl\/en\/services\/pod-eco\/\">w\u0142asnego zak\u0142adu recyklingu<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Logic of 3-layer construction (A\/B\/A or A\/B\/C arrangement)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Outer layer (A)<\/strong> \u2014 responsible for stiffness, optical parameters, printability, temperature resistance<\/li>\n\n\n\n<li><strong>Middle layer (B)<\/strong> \u2014 mechanical carrier, space for recyclate (PCR), cost regulator<\/li>\n\n\n\n<li><strong>Inner layer (A or C)<\/strong> \u2014 sealing layer (hot-tack, SIT, peel)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">What did this bring to the market? Since its introduction, 3-layer co-extrusion has significantly improved the mechanical properties of films compared to films of the same composition made in a monolayer construction. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In practice, this means lower grammage with the same strength, better control over sealing, and the ability to use cheaper raw materials in the middle layer without losing performance parameters.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>But 3 Layers Have a Ceiling<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">And here&#8217;s where it gets interesting. In recent years, it has become clear that the limit of maximum mechanical properties achievable in 3-layer films has been reached in many applications \u2014 even with the use of the latest polyolefin resins. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In other words: <strong>further optimization of the 3-layer formulation ceased to yield results<\/strong>. To go higher, the architecture needs to change. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>3. What Real Benefits Come from Transitioning from 3 to 5 Layers<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is not about &#8220;adding two layers for effect.&#8221; It&#8217;s a completely different construction logic. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5-layer architecture (typically A\/B\/C\/B\/A or A\/B\/C\/D\/E)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In a 5-layer system, we have <strong>two additional functional layers<\/strong> at our disposal \u2014 most often called <em>sub-skin layers<\/em> \u2014 which act as bridges between the outer layers and the core. This allows for: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Better matching of raw materials in each layer to its specific function<\/li>\n\n\n\n<li>Thinner distribution of expensive components (e.g., metallocenes, functional additives)<\/li>\n\n\n\n<li>Introduction of a barrier layer (EVOH, PA) without compromising sealability<\/li>\n\n\n\n<li>Increasing the thickness of the middle layer with PCR without losing surface properties<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What Science Says<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">5-layer films have existed for many years, but initially, they were mainly used to create structures with a barrier layer from non-polyolefin raw materials. The die heads used had very thin core layers because barrier resins are relatively expensive. Purely polyolefin films produced on such equipment did not show significant advantages over 3-layer counterparts.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This has changed. Modern 5-layer die heads are designed with a <strong>more balanced distribution of layer thicknesses<\/strong>, which, according to patent and review studies, allows for significant improvements in mechanical properties compared to the best 3-layer films \u2014 even when both structures are based on the same raw materials. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>In Numbers \u2014 What Exactly Improves<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">According to aggregated industry data, multilayer systems produce films with better aesthetics and functionality, achieving 85\u201390 gloss units (GU) compared to 40\u201360 GU in monolayer. Co-extruded surface layers also improve slip parameters (coefficient of friction 0.2\u20130.3) and reduce haze below 5%. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the context of specific food applications, 5-layer structures with EVOH (PE\/PE\/Tie\/EVOH\/Tie\/PE\/PE extended to 7 layers) have allowed oxygen permeability to be reduced to values below 10 cm\u00b3\/m\u00b2\/day while maintaining high mechanical parameters of PE film. This is the level that determines whether frozen foods, aged cheeses, or vacuum-packed meat will withstand their declared shelf life. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>4. When 3 Layers Are Enough, and When You Need 5<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is a question every product manager and procurement professional in a packaging company should ask themselves. The answer depends not on the price of the film, but on the <strong>total cost of your process<\/strong>. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3 layers are optimal when:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The application does not require a gas barrier (most industrial, technical, palletizing applications)<\/li>\n\n\n\n<li>The packaging line operates stably, without temperature bottlenecks<\/li>\n\n\n\n<li>The product does not require a long shelf-life<\/li>\n\n\n\n<li>Volume is very high, and margins are low \u2014 and every penny per kilogram counts in the P&amp;L<\/li>\n\n\n\n<li>The film is dedicated to a process with low tolerance for contamination within the seal<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5 layers are justified when:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Products sensitive to oxygen, moisture, or aromas are packaged (frozen foods, coffee, cheeses, meat)<\/li>\n\n\n\n<li><strong>Seal process stability<\/strong> is critical under contamination conditions (dust, oil, plasma)<\/li>\n\n\n\n<li>The customer needs a wide sealing window (hot-tack) and reduced initiation temperature (LOW SIT)<\/li>\n\n\n\n<li>The application requires a combination of properties that 3 layers cannot reconcile (e.g., high gloss + thermal resistance + low SIT)<\/li>\n\n\n\n<li>The company&#8217;s ESG strategy assumes an increase in PCR content without losing surface properties<\/li>\n\n\n\n<li>The scale of production is large enough that even a 1\u20132% reduction in line downtime yields six-figure annual savings<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Decision Framework \u2014 Total Cost, Not Film Price<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A 5-layer film will usually be <strong>more expensive per kilogram<\/strong>. But the true calculation looks different: <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Actual cost = (film price \u00d7 consumption) <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">  + (downtime cost \u00d7 frequency of sealing failures) <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">  + (complaint cost \u00d7 defect rate) <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">  + (cost of lost orders \u00d7 OTIF gap)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In our operational data, we see that customers who switched from 3 to 5 layers for FFS and lamination applications report a reduction in micro-downtime of 15\u201330%. For a continuously operating line, this is a return on investment measured in weeks, not years. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>5. Recykling i ESG &#8211; gdzie 5 warstw daje przewag\u0119 regulacyjn\u0105<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is a topic that most buyers don&#8217;t have on their radar yet, but it will soon impact their P&amp;L: <strong>PPWR (Packaging and Packaging Waste Regulation)<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Traditional multi-material laminates are problematic for recycling. Co-extruded mono-PE constructions \u2014 regardless of the number of layers \u2014 are recyclable within the PE stream. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Research reveals an interesting fact. In studies on five-layer co-extruded polyethylene film LLDPE\/mPE\/PVA\/mPE\/LLDPE, after four recycling cycles, longitudinal tensile strength decreased from 29.66 MPa to 21.97 MPa, and transverse from 24.9 MPa to 19.22 MPa \u2014 meaning the film retains good mechanical properties even after recycling. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This means that a well-designed 5-layer construction can:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Meet PPWR requirements (recyclability, PCR content)<\/li>\n\n\n\n<li>Retain performance properties after recycling<\/li>\n\n\n\n<li>Allow for the introduction of 30%+ PCR in the middle layer without compromising the sealing layers<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This is not &#8220;eco storytelling.&#8221; This is a <strong>real competitive advantage<\/strong> \u2014 especially with customers in DACH, Scandinavia, and Benelux, where large retailers are already auditing packaging suppliers for PPWR compliance. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>6. Co to znaczy w praktyce &#8211; perspektywa Twojej linii<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Finally, let&#8217;s move away from polymers and return to what truly interests production.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3-layer film means for your line:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A proven, stable material for most standard applications<\/li>\n\n\n\n<li>Good price\/performance ratio where there are no bottlenecks<\/li>\n\n\n\n<li>A solid base that won&#8217;t surprise you positively, but also not negatively<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5-layer film means for your line:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wider process window (greater tolerance to temperature fluctuations)<\/li>\n\n\n\n<li>More stable sealing even with contaminants in the sealing area<\/li>\n\n\n\n<li>Better hot-tack parameters \u2014 important for fast FFS lines<\/li>\n\n\n\n<li>Ability to package demanding products that you previously avoided<\/li>\n\n\n\n<li>An argument for your end-customer clients regarding ESG<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Instead of a Summary<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The choice between 3 and 5 layers is not a technical decision. It is a <strong>business<\/strong> decision \u2014 about how your company wants to compete in the next 5 years. Whether we play on unit cost or process stability and compliance.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There is no single right answer. There is only the right answer <strong>for your specific application, line, and end customer<\/strong>. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you want to discuss which film construction actually makes sense for your process \u2014 with a total cost calculation, not just the price per kilogram \u2014 contact our technological team. The first conversation usually takes 30 minutes, during which we can tell you if it&#8217;s even worth exploring the topic further. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bo lepiej szybko stwierdzi\u0107, \u017ce 3 warstwy w zupe\u0142no\u015bci wystarcz\u0105, ni\u017c przep\u0142aci\u0107 za 5, kt\u00f3rych nie potrzebujesz. I odwrotnie \u2014 lepiej zainwestowa\u0107 w 5 warstw, ni\u017c latami traci\u0107 na przestojach linii.<br><br><br><br><br><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>About the Author<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Oskar Nawrocki \u2014 CEO Kablonex, producenta folii PE i PP z ponad 55-letni\u0105 tradycj\u0105. Kablonex obejmuje pe\u0142en \u0142a\u0144cuch warto\u015bci: ekstruzj\u0119 (1\u20135 warstw, do 1000 kg\/h), <a href=\"https:\/\/kablonex.pl\/en\/services\/nex-print\/\">druk flexograficzny<\/a> do 10 kolor\u00f3w, konfekcj\u0119 oraz w\u0142asny zak\u0142ad recyklingu (POD ECO). Firma posiada certyfikacje BRC, ISO i EcoVadis, dostarcza folie do klient\u00f3w w Polsce i Europie, ze szczeg\u00f3lnym naciskiem na rynki DACH. Strategia firmy \u0142\u0105czy klasyczn\u0105 solidno\u015b\u0107 produkcyjn\u0105 z transformacj\u0105 w kierunku circular economy \u2014 z wykorzystaniem technologii 5-warstwowej i recyklatu PCR jako kluczowych d\u017awigni rozwoju.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Je\u015bli chcesz porozmawia\u0107 o tym, jak dobra\u0107 konstrukcj\u0119 folii do Twojej linii pakuj\u0105cej \u2014 napisz na <\/em><a href=\"mailto:askkablonex@kablonex.com.pl\"><em>ask@kablonex.com.pl<\/em><\/a><em>.<\/em><br><br><br><br><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Scientific and Industry Sources<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Multilayer polyolefin blown film<\/strong> \u2014 patent US 9,126,269 (2010) \u2014 analysis of the limits of mechanical properties of 3-layer films and the potential of 5-layer constructions<\/li>\n\n\n\n<li><strong>Stieglitz M., Hopmann C., Leuchtenberger-Engel L., Junge H. (2025)<\/strong> \u2014 <em>Correlation between process conditions and mechanical film properties in foamed multilayer blown films<\/em>, Journal of Plastic Film &amp; Sheeting<\/li>\n\n\n\n<li><strong>Guleria D., Edeleva M., Vervoort S. et al. (2025)<\/strong> \u2014 <em>Impact of molecular architecture and draw ratio on enhancement of targeted mechanical properties of MDO polyethylene films<\/em>, Journal of Plastic Film &amp; Sheeting<\/li>\n\n\n\n<li><strong>Borreani G., Tabacco E. (2014)<\/strong> \u2014 studies on EVOH\/PE structures in 5\u20137 layer films for barrier applications (cited from ScienceDirect, Barrier Film overview)<\/li>\n\n\n\n<li><strong>Recyclable Mono-Material Polyethylene Functional Film<\/strong> (2024) \u2014 <em>PMC, NIH<\/em> \u2014 studies on the retention of properties of 5-layer PE film after recycling cycles<\/li>\n\n\n\n<li><strong>Adam et al. (2025)<\/strong> \u2014 <em>Recycling of Multilayer Polymeric Barrier Films<\/em>, Macromolecular Materials and Engineering<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Zobacz, jak to wygl\u0105da w Twojej bran\u017cy:<\/strong> <a href=\"https:\/\/kablonex.pl\/branze\/drukarnie-i-konwerterzy\/\">Drukarnie i konwerterzy<\/a> i <a href=\"https:\/\/kablonex.pl\/branze\/nawozy\/\">Nawozy i chemia rolnicza<\/a>. Na ka\u017cdej stronie: co si\u0119 psuje, co liczymy zamiast ceny za kg i wdro\u017cenia z liczbami.<\/p>\n\n\n\n<div class=\"kx-seealso\" style=\"max-width:1320px;margin:48px auto;padding-inline:0;box-sizing:border-box\"><style>.kx-seealso .kxs{display:flex;gap:18px;align-items:center;flex-wrap:wrap;background:#EEF2F6;border-left:4px solid #E93635;border-radius:2px;padding:20px 24px}.kx-seealso .kxs p{margin:0;font-size:15px;line-height:1.55;color:#4B5565;flex:1 1 340px}.kx-seealso .kxs b{color:#151226}.kx-seealso .kxs a.kxs-btn{background:#E93635;color:#fff;text-decoration:none;font-weight:700;font-size:14px;padding:11px 18px;border-radius:2px;white-space:nowrap}.kx-seealso .kxs a.kxs-btn:hover{background:#0B56A0}<\/style><div class=\"kxs\"><p><b>See extrusion with your own eyes.<\/b> The die, a bubble inflated with compressed air and a line that delivers up to five layers, in the film from our plant in Podanin.<\/p><a class=\"kxs-btn\" href=\"https:\/\/kablonex.pl\/en\/knowledge\/how-packaging-film-is-made\/#extrusion\">Watch blown film extrusion<\/a><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Introduction W ostatnich 25 latach bran\u017ca folii opakowaniowych przesz\u0142a technologiczn\u0105 rewolucj\u0119: od folii mono warstwowej, przez konstrukcje 3-warstwowe, po dzi\u015b ju\u017c niemal standardowe uk\u0142ady 5-warstwowe. W Kablonex obie te technologie pracuj\u0105 u nas r\u00f3wnolegle &#8211; bo ka\u017cda ma swoje miejsce, swojego klienta i swoj\u0105 ekonomi\u0119. In this article, I will break this down. Specifically, from [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":1610,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","footnotes":""},"categories":[24],"tags":[],"class_list":["post-2102","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Multilayer Extrusion \u2014 How 3 and 5 Layers Change Film Properties - Kablonex<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kablonex.pl\/en\/news\/multilayer-extrusion-how-3-and-5-layers-change-film-properties\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Multilayer Extrusion \u2014 How 3 and 5 Layers Change Film Properties - Kablonex\" \/>\n<meta property=\"og:description\" content=\"Introduction W ostatnich 25 latach bran\u017ca folii opakowaniowych przesz\u0142a technologiczn\u0105 rewolucj\u0119: od folii mono warstwowej, przez konstrukcje 3-warstwowe, po dzi\u015b ju\u017c niemal standardowe uk\u0142ady 5-warstwowe. 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