{"id":3192,"date":"2026-03-04T14:50:49","date_gmt":"2026-03-04T13:50:49","guid":{"rendered":"https:\/\/kkuipmd.cluster100.hosting.ovh.net\/shrink-wrapped-packaging\/"},"modified":"2026-03-24T16:59:09","modified_gmt":"2026-03-24T15:59:09","slug":"shrink-wrapped-packaging","status":"publish","type":"post","link":"https:\/\/befor.fr\/en\/shrink-wrapped-packaging\/","title":{"rendered":"Shrink film: how it works, film types and machine selection"},"content":{"rendered":"<p><strong>Shrinkwrapping<\/strong> involves wrapping a product in a plastic film which, under the effect of heat, shrinks to fit its shape. This solution is useful for <strong>bundling<\/strong>, protection and certain food applications. <\/p><div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\"><div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66%\"><blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>To remember<\/strong>: the process takes place in 2 stages &#8211; <strong>sealing<\/strong> then <strong>shrinking<\/strong> &#8211; in a chamber (compact) or via a tunnel (high-speed).<\/p><\/blockquote><\/div>\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:34%\"><div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\"><div class=\"wp-block-button has-custom-width wp-block-button__width-100\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/befor.fr\/en\/contact-us\/\">Learn more<\/a><\/div><\/div>\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\"><div class=\"wp-block-button has-custom-width wp-block-button__width-100 is-style-outline is-style-outline--1\"><a class=\"wp-block-button__link wp-element-button\" href=\"#faq-retract\">See FAQ<\/a><\/div><\/div><\/div><\/div><hr class=\"wp-block-separator has-css-opacity\"\/><h2 class=\"wp-block-heading\" id=\"sommaire-retract\">Contents<\/h2><ul class=\"wp-block-list\"><li><a href=\"#principe-retract\">Principle (2 phases)<\/a><\/li>\n\n<li><a href=\"#machines-retract\">Bell vs tunnel<\/a><\/li>\n\n<li><a href=\"#films-retract\">Film types (PO, PVC, PE)<\/a><\/li>\n\n<li><a href=\"#conseils-retract\">Setting tips<\/a><\/li>\n\n<li><a href=\"#faq-retract\">FAQ + Schema<\/a><\/li>\n\n<li><a href=\"#ensavoirplus-retract\">Learn more<\/a><\/li><\/ul><hr class=\"wp-block-separator has-css-opacity\"\/><h2 class=\"wp-block-heading\" id=\"principe-retract\">Principle (2 phases)<\/h2><figure class=\"wp-block-table\"><table><thead><tr><th>Phase<\/th><th>What&#8217;s happening<\/th><th>Objective<\/th><\/tr><\/thead><tbody><tr><td>Welding<\/td><td>The frame seals and closes the film around the product<\/td><td>Form a neatly sealed package.<\/td><\/tr><tr><td>Shrinkage<\/td><td>Transfer to heated zone (bell or tunnel)<\/td><td>Stretch the film, expel air and obtain a clean finish.<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\" id=\"machines-retract\">Bell vs tunnel<\/h2><div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\"><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><h3 class=\"wp-block-heading\" id=\"machines-a-cloche\">Bell machines<\/h3>\n\n<ul class=\"wp-block-list\"><li>Compact: welding + shrinking in one chamber.<\/li>\n\n<li>Interesting for low\/medium output.<\/li>\n\n<li>Possibility of welding alone, depending on model.<\/li><\/ul><\/div>\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><h3 class=\"wp-block-heading\" id=\"tunnel-de-retraction\">Shrink tunnel<\/h3>\n\n<ul class=\"wp-block-list\"><li>Continuous flow: higher productivity.<\/li>\n\n<li>Stable quality: controlled temperature and air flow.<\/li>\n\n<li>Cooling on exit: film freezes quickly.<\/li><\/ul><\/div><\/div><h2 class=\"wp-block-heading\" id=\"films-retract\">Film types<\/h2><figure class=\"wp-block-table\"><table><thead><tr><th>Film<\/th><th>Features<\/th><th>Uses<\/th><\/tr><\/thead><tbody><tr><td>Polyolefin (PO)<\/td><td>Glossy, resistant, food standard<\/td><td>Food\/cosmetics, premium rendering.<\/td><\/tr><tr><td>PVC<\/td><td>Easy to shrink at low temperatures, less responsible<\/td><td>Specific uses.<\/td><\/tr><tr><td>Polyethylene (PE)<\/td><td>Thicker, more resistant<\/td><td>Shrink-wrapping (packs), logistics.<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\" id=\"conseils-retract\">Setting tips<\/h2><ul class=\"wp-block-list\"><li><strong>Temperature<\/strong>: too hot \u2192 pierced film; too cold \u2192 wrinkles.<\/li>\n\n<li><strong>Perforation<\/strong>: micro-perforation to allow air to escape.<\/li>\n\n<li><strong>Centering<\/strong>: position the product facing the air flow to limit distortion.<\/li><\/ul><hr class=\"wp-block-separator has-css-opacity\"\/><h2 class=\"wp-block-heading\" id=\"faq-retract\">FAQ (SEO optimized)<\/h2><h3 class=\"wp-block-heading\" id=\"pourquoi-faut-il-perforer-le-film\">Why is it necessary to perforate the film?<\/h3><p>To allow air to escape during shrinkage and avoid bubbles, wrinkles and finish defects.<\/p><h3 class=\"wp-block-heading\" id=\"cloche-ou-tunnel-que-privilegier\">Bell or tunnel: which is better?<\/h3><p>The cloche is ideal for small footprints and moderate throughputs. The tunnel is ideal for continuous flow and higher productivity. <\/p><script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"Pourquoi faut-il perforer le film ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Pour laisser l\u2019air s\u2019\u00e9chapper pendant la r\u00e9traction et \u00e9viter bulles, plis et d\u00e9fauts de finition.\"}},\n{\"@type\":\"Question\",\"name\":\"Cloche ou tunnel : que privil\u00e9gier ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"La cloche est id\u00e9ale pour un encombrement r\u00e9duit et des cadences mod\u00e9r\u00e9es. Le tunnel devient int\u00e9ressant pour un flux continu et une productivit\u00e9 plus \u00e9lev\u00e9e.\"}}\n]}\n<\/script><h2 class=\"wp-block-heading\" id=\"ensavoirplus-retract\">Learn more<\/h2><p>Would you like to choose the right film (PO\/PE) and size the equipment according to your output and formats?<\/p><div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\"><div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/befor.fr\/en\/contact-us\/\">Learn more<\/a><\/div>\n\n<div class=\"wp-block-button is-style-outline is-style-outline--2\"><a class=\"wp-block-button__link wp-element-button\" href=\"#sommaire-retract\">Back to contents<\/a><\/div><\/div><p><\/p>","protected":false},"excerpt":{"rendered":"<p>Shrinkwrapping involves wrapping a product in a plastic film which, under the effect of heat, shrinks to fit its shape. This solution is useful for bundling, protection and certain food applications. To remember: the process takes place in 2 stages &#8211; sealing then shrinking &#8211; in a chamber (compact) or via a tunnel (high-speed). Contents [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_gspb_post_css":"","footnotes":""},"categories":[296],"tags":[],"class_list":["post-3192","post","type-post","status-publish","format-standard","hentry","category-technologies"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Shrink-wrapped packaging: gain in speed and safety | Befor<\/title>\n<meta name=\"description\" content=\"Shrink film secures your product by conforming to its shape. 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