{"id":2584,"date":"2019-02-22T14:54:36","date_gmt":"2019-02-22T13:54:36","guid":{"rendered":"https:\/\/www.herbert.be?p=2584"},"modified":"2019-06-03T14:54:52","modified_gmt":"2019-06-03T13:54:52","slug":"ettlinger-ultra-fine-microperforation-sets-new-standards-in-melt-filtration","status":"publish","type":"post","link":"https:\/\/www.herbert.be\/fr\/ettlinger-ultra-fine-microperforation-sets-new-standards-in-melt-filtration-2584","title":{"rendered":"ETTLINGER – Ultra-fine microperforation sets new standards in melt filtration"},"content":{"rendered":"

\"\"

Thanks to the even smaller 60 \u03bcm screen size which is now available for Ettlinger\u2019s ECO series, these filters are ideal whenever 100% PET bottle flake is used in thermoform sheets, packaging tape or staple fiber plants. \u00a9 Ettlinger<\/sup><\/p><\/div><\/p>\n

 <\/p>\n

K\u00f6nigsbrunn, Germany, February 2019 \u2013 With unprecedented filtration fineness of 60 \u03bcm, Ettlinger\u2019s ECO melt filters<\/strong> will in the future make it easier to treat recycled material for the film, packaging tape and fiber industry and help plastics recyclers remove challenging contaminants like paints, silicones, barrier materials, cross-linked fractions and gels from the melt. In particular, the new filter screens will enable cost-efficient conversion of post-consumer PET bottle flake and fines, which generally occur in large amounts, into recycled material with excellent usage properties.<\/p>\n

 <\/p>\n

Recycled PET from post-consumer bottle flake is highly sought-after in the industry as a raw material for thermoforming packaging, fibers or packaging tapes. Against the background of increased environmental awareness, such products are also widely accepted \u2013 and in considerable demand \u2013 among consumers. Depending on the application, the recycled materials often have to meet high requirements in terms of appearance and \/ or mechanical properties. For instance, even food packaging made entirely from bottle flake is not allowed to contain any contaminants. Additionally, tapes or yarn which are stretched must not exhibit any defects that could cause them to tear and disrupt production.<\/p>\n

 <\/p>\n

The purity of the recycled material is central to its usability. Therefore, in the PET world, the efficiency of the melt filtration process is far more critical than usual on the recycled material production line. The screen changers and screens normally employed for this purpose have limitations here, whereas Ettlinger\u2019s self-cleaning ECO filter systems permit compliance with even the toughest specifications. The core component of the ECO filter is a rotating, cylindrical steel screen with millions of conical holes drilled by laser. When melt flows through this screen from the outside to the inside, any contaminants are retained on the surface and continuously removed by a scraper. The decisive breakthrough as far as PET recycling is concerned was the recent market launch of a microperforation with an unprecedented filtration fineness of 60 \u03bcm.<\/p>\n

\u00a0<\/strong><\/p>\n

Limitation of woven steel mesh screens <\/strong><\/p>\n

Woven steel mesh screens are made of fine metal wires. A square mesh is the simplest and most commonly encountered type. The side length of the openings corresponds to the screen\u2019s nominal mesh size. However, in practice, a square mesh allows much larger particles (factor 1.41) to pass owing to the diagonal. Furthermore, the individual wires are only linked together loosely. As the filter cake grows and the pressure rises, some meshes may be enlarged, so that particles bigger than the nominal mesh size slip through.<\/p>\n

Contaminants contained in the PET bottle flake such as aluminum or paper as well as \u201cblack specks\u201d \u2013 black, degraded plastic particles that occur during the process \u2013regularly find their way into the recycled material. The resulting scrap pushes up the cost.<\/p>\n

This also has negative impacts on the downstream extrusion process because the build-up of a filter cake on woven steel mesh screens accompanied by strong pressure fluctuations and the need for frequent screen changes creates extra work, as does cleaning with a reverse melt flow (backflush).<\/p>\n

\u00a0<\/strong><\/p>\n

Lasered microperforation is the answer <\/strong><\/p>\n

These traditional woven steel mesh screens contrast with Ettlinger\u2019s rigid filter screens, whose laser-drilled microperforation impresses with much better separation efficiency. The woven steel mesh screens have a mesh size corresponding to the cross section of the conical holes in the filter screen, which are tapered in the direction of the melt flow. When melt flows through the screens, all contaminants larger than the hole diameter are retained on the filter surface. Thanks to the new 60 \u03bcm filtration fineness, the few residual contaminants are no longer visible to the human eye. The PET recycling process also has the basic ability to convert recycled material into new products with visual, mechanical and organoleptic properties that are indistinguishable from virgin material. The significantly reduced occurrence of black specks and other particles helps make the line more efficient because there are virtually no torn tapes or fibers; ultimately leading to substantial savings.<\/p>\n

 <\/p>\n

Added to this is the system-specific advantage of all Ettlinger-built melt filters, namely the continuous, constant filtration efficiency over several weeks or months without any process interruptions. They work according to the principle that contaminants are removed from the microperforated filter screen by a scraper, and immediately discharged, with every rotation. The filtration surface remains absolutely clean as a result and the melt filter works with a constant pressure for exceptionally long periods. Contaminants such as small elastic particles like silicone etc. which could otherwise be forced through the screen after a while, are unable to collect on the surface.<\/p>\n

\u00a0<\/strong><\/p>\n

Previously unused material flows acquire commercial value <\/strong><\/p>\n

Ettlinger\u2019s continuous melt filters regularly open up new possibilities for materials that have traditionally been considered too heavily contaminated or that contain extremely problematic contaminants. The new 60 \u03bcm filter screen makes the use of PET fines from recycled bottles an even more commercially attractive option. These fines occur during the sorting, grinding and washing processes and tend to be contaminated with large amounts of paper and aluminum. Although up to 20 tons of fines per month are generated even in small PET bottle recycling plants, this material is sold at a low price for want of an alternative. Ettlinger\u2019s continuous, high speed ECO melt filter will let customers convert their PET material flows into an even higher quality \u2013 and hence more profitable \u2013 end product.<\/p>\n","protected":false},"excerpt":{"rendered":"

  K\u00f6nigsbrunn, Germany, February 2019 \u2013 With unprecedented filtration fineness of 60 \u03bcm, Ettlinger\u2019s ECO melt filters will in the future make it easier to treat recycled material for the film, packaging tape and fiber industry and help plastics recyclers [&hellip<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[59],"tags":[],"class_list":["post-2584","post","type-post","status-publish","format-standard","hentry","category-plastics-recycling-fr"],"acf":[],"yoast_head":"\nETTLINGER - Ultra-fine microperforation sets new standards in melt filtration<\/title>\n<meta name=\"description\" content=\"  K\u00f6nigsbrunn, Germany, February 2019 \u2013 With unprecedented filtration fineness of 60 \u03bcm, Ettlinger\u2019s ECO melt filters will in the future make it\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.herbert.be\/fr\/ettlinger-ultra-fine-microperforation-sets-new-standards-in-melt-filtration-2584\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ETTLINGER - Ultra-fine microperforation sets new standards in melt filtration\" \/>\n<meta property=\"og:description\" content=\"  K\u00f6nigsbrunn, Germany, February 2019 \u2013 With unprecedented filtration fineness of 60 \u03bcm, Ettlinger\u2019s ECO melt filters will in the future make it\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.herbert.be\/fr\/ettlinger-ultra-fine-microperforation-sets-new-standards-in-melt-filtration-2584\" \/>\n<meta property=\"og:site_name\" content=\"Herbert\" \/>\n<meta property=\"article:published_time\" content=\"2019-02-22T13:54:36+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-06-03T13:54:52+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/www.herbert.be\/wp-content\/uploads\/images\/ECO-PET60mu.jpg\" \/>\n<meta name=\"author\" content=\"Herbert Machines\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Herbert Machines\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.herbert.be\\\/fr\\\/ettlinger-ultra-fine-microperforation-sets-new-standards-in-melt-filtration-2584#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.herbert.be\\\/fr\\\/ettlinger-ultra-fine-microperforation-sets-new-standards-in-melt-filtration-2584\"},\"author\":{\"name\":\"Herbert Machines\",\"@id\":\"https:\\\/\\\/www.herbert.be\\\/#\\\/schema\\\/person\\\/80df284f4f4d5fff65f3e3136ae0a4bc\"},\"headline\":\"ETTLINGER – Ultra-fine microperforation sets new standards in melt filtration\",\"datePublished\":\"2019-02-22T13:54:36+00:00\",\"dateModified\":\"2019-06-03T13:54:52+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.herbert.be\\\/fr\\\/ettlinger-ultra-fine-microperforation-sets-new-standards-in-melt-filtration-2584\"},\"wordCount\":941,\"image\":{\"@id\":\"https:\\\/\\\/www.herbert.be\\\/fr\\\/ettlinger-ultra-fine-microperforation-sets-new-standards-in-melt-filtration-2584#primaryimage\"},\"thumbnailUrl\":\"http:\\\/\\\/www.herbert.be\\\/wp-content\\\/uploads\\\/images\\\/ECO-PET60mu.jpg\",\"articleSection\":[\"Plastics & Recycling\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.herbert.be\\\/fr\\\/ettlinger-ultra-fine-microperforation-sets-new-standards-in-melt-filtration-2584\",\"url\":\"https:\\\/\\\/www.herbert.be\\\/fr\\\/ettlinger-ultra-fine-microperforation-sets-new-standards-in-melt-filtration-2584\",\"name\":\"ETTLINGER - 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