{"id":22803,"date":"2026-09-23T08:00:12","date_gmt":"2026-09-23T08:00:12","guid":{"rendered":"https:\/\/www.teamplast-srl.it\/?p=22803"},"modified":"2026-09-15T13:22:44","modified_gmt":"2026-09-15T13:22:44","slug":"dal-granulo-alla-busta-produzione-packaging","status":"publish","type":"post","link":"https:\/\/www.teamplast-srl.it\/en\/dal-granulo-alla-busta-produzione-packaging\/","title":{"rendered":"From granule to sachet: how flexible PE packaging is created | Teamplast"},"content":{"rendered":"<article>\n<h2>From granule to bag: how flexible polyethylene packaging is actually created<\/h2>\n<p>A polyethylene bag may seem like a simple product. In reality, before reaching the customer, it goes through a series of technical decisions and processes where a few details can significantly impact the final result.<\/p>\n<p>Follow the path <strong>from granule to bag<\/strong> It helps to understand why size, material, printing and welding are not independent elements, but parts of the same project.<\/p>\n<\/article>\n<article>\n<h2><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-22804\" src=\"https:\/\/www.teamplast-srl.it\/wp-content\/uploads\/2026\/08\/infografica-Dal-granulo-alla-busta-e1787578292934-300x143.png\" alt=\"infografica Dal granulo alla busta\" width=\"902\" height=\"430\" srcset=\"https:\/\/www.teamplast-srl.it\/wp-content\/uploads\/2026\/08\/infografica-Dal-granulo-alla-busta-e1787578292934-300x143.png 300w, https:\/\/www.teamplast-srl.it\/wp-content\/uploads\/2026\/08\/infografica-Dal-granulo-alla-busta-e1787578292934-1024x489.png 1024w, https:\/\/www.teamplast-srl.it\/wp-content\/uploads\/2026\/08\/infografica-Dal-granulo-alla-busta-e1787578292934-768x367.png 768w, https:\/\/www.teamplast-srl.it\/wp-content\/uploads\/2026\/08\/infografica-Dal-granulo-alla-busta-e1787578292934-1536x733.png 1536w, https:\/\/www.teamplast-srl.it\/wp-content\/uploads\/2026\/08\/infografica-Dal-granulo-alla-busta-e1787578292934-18x9.png 18w, https:\/\/www.teamplast-srl.it\/wp-content\/uploads\/2026\/08\/infografica-Dal-granulo-alla-busta-e1787578292934.png 1640w\" sizes=\"auto, (max-width: 902px) 100vw, 902px\" \/><\/h2>\n<h2>1. Start with the application, not the machine<\/h2>\n<p>Before the granule comes the question:<\/p>\n<p><strong>What does this packaging have to do?<\/strong><\/p>\n<p>Contain, protect, separate, cover, be filled automatically, resist cold, be printed, open easily or withstand edges and handling?<\/p>\n<p>The answers determine:<\/p>\n<ul>\n<li>format;<\/li>\n<li>thickness;<\/li>\n<li>type of polyethylene;<\/li>\n<li>formulation;<\/li>\n<li>subsequent processes.<\/li>\n<\/ul>\n<h2>2. Raw materials and formulation<\/h2>\n<p>Polyethylene is not a unique material.<\/p>\n<p><strong>LDPE, MDPE and HDPE<\/strong> They have different characteristics and, within each family, the choice of granules and additives allows for the modulation of properties such as:<\/p>\n<ul>\n<li>elasticity;<\/li>\n<li>rigidity;<\/li>\n<li>smoothness;<\/li>\n<li>weldability;<\/li>\n<li>mechanical behavior.<\/li>\n<\/ul>\n<p>A correct formulation must be consistent with both the end use and the production process.<\/p>\n<h2>3. Extrusion: the film is born<\/h2>\n<p>In the&#039;\u2019<strong>extrusion<\/strong> the material is plasticized and transformed into film.<\/p>\n<p>In the blown process, the polyethylene tube is formed, cooled and stabilized, then wound into a coil.<\/p>\n<p>This is where key features are built:<\/p>\n<ul>\n<li>length;<\/li>\n<li>thickness;<\/li>\n<li>uniformity;<\/li>\n<li>surface quality.<\/li>\n<\/ul>\n<p>Monitoring process stability is essential because a seemingly small variation can have repercussions on subsequent processes.<\/p>\n<h2>4. Print: function and identity<\/h2>\n<p>When expected, the <strong>flexographic printing<\/strong> transforms the film into a tool of communication as well as protection.<\/p>\n<p>Colors, texts, trademarks, symbols, and technical information must be reproduced with appropriate consistency, register, and adhesion.<\/p>\n<p>For food applications, print management must also be consistent with the <a href=\"https:\/\/eur-lex.europa.eu\/legal-content\/IT\/TXT\/PDF\/?uri=CELEX:32006R2023\" target=\"_blank\" rel=\"noopener\">good manufacturing practices<\/a> and with the material configuration, avoiding unwanted transfers to the contact side.<\/p>\n<h2>5. Welding and transformation<\/h2>\n<p>The reel is then transformed into the final format.<\/p>\n<p>Bottom, side or other welding configurations vary depending on the product.<\/p>\n<p>Parameters of:<\/p>\n<ul>\n<li>temperature;<\/li>\n<li>pressure;<\/li>\n<li>time;<\/li>\n<li>weld geometry;<\/li>\n<\/ul>\n<p>must be compatible with film, thickness and application.<\/p>\n<p><strong>It is often at this stage that a technically sound film becomes \u2013 or fails to become \u2013 a reliable envelope.<\/strong><\/p>\n<h2>6. Customizations and controls<\/h2>\n<p>Holes, micro-holes, pre-cuts, handles, closures and other features can be integrated depending on the application.<\/p>\n<p>Checks accompany the process:<\/p>\n<ul>\n<li>dimensions;<\/li>\n<li>thickness;<\/li>\n<li>I wait;<\/li>\n<li>press;<\/li>\n<li>welding;<\/li>\n<li>amount;<\/li>\n<li>traceability.<\/li>\n<\/ul>\n<p>All these elements must remain consistent with the agreed specifications.<\/p>\n<h2>7. Packaging and delivery<\/h2>\n<p>Secondary packaging and palletization also have a technical function:<\/p>\n<p><strong>protect the product during storage and transport and make it practical to use on the customer&#039;s line.<\/strong><\/p>\n<h2>Why tell the process<\/h2>\n<p>Knowing how an envelope is made also helps you design better.<\/p>\n<p>A requested downstream change can have upstream consequences; a critical welding issue can be formulation- or film-related; a printing requirement can impact the overall design.<\/p>\n<h2>The Teamplast approach<\/h2>\n<p>At Teamplast, the value lies not only in transforming polyethylene, but in connecting these phases in a process consistent with the customer&#039;s application.<\/p>\n<p><strong>Behind a seemingly simple envelope lies a chain of technical choices that must function as a single system.<\/strong><\/p>\n<p><a href=\"https:\/\/www.teamplast-srl.it\/en\/contatti\/\"><strong>Want to see how your packaging is created?<\/strong><\/a> Contact us to learn more about the process and evaluate the solution best suited to your application&#039;s characteristics.<\/p>\n<\/article>","protected":false},"excerpt":{"rendered":"<p>Dal granulo alla busta: come nasce realmente un imballaggio flessibile in polietilene Una busta in polietilene pu\u00f2 sembrare un prodotto semplice. In realt\u00e0, prima di arrivare al cliente attraversa una&#8230;<\/p>","protected":false},"author":2,"featured_media":22805,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-22803","post","type-post","status-publish","format-standard","has-post-thumbnail","category-news"],"_links":{"self":[{"href":"https:\/\/www.teamplast-srl.it\/en\/wp-json\/wp\/v2\/posts\/22803","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.teamplast-srl.it\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.teamplast-srl.it\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.teamplast-srl.it\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.teamplast-srl.it\/en\/wp-json\/wp\/v2\/comments?post=22803"}],"version-history":[{"count":1,"href":"https:\/\/www.teamplast-srl.it\/en\/wp-json\/wp\/v2\/posts\/22803\/revisions"}],"predecessor-version":[{"id":22806,"href":"https:\/\/www.teamplast-srl.it\/en\/wp-json\/wp\/v2\/posts\/22803\/revisions\/22806"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.teamplast-srl.it\/en\/wp-json\/wp\/v2\/media\/22805"}],"wp:attachment":[{"href":"https:\/\/www.teamplast-srl.it\/en\/wp-json\/wp\/v2\/media?parent=22803"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.teamplast-srl.it\/en\/wp-json\/wp\/v2\/categories?post=22803"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.teamplast-srl.it\/en\/wp-json\/wp\/v2\/tags?post=22803"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}