{"id":3485,"date":"2026-05-25T11:01:26","date_gmt":"2026-05-25T11:01:26","guid":{"rendered":"https:\/\/spm-macchine.com\/filtro\/filtro-hepa-minipleat\/"},"modified":"2026-09-04T10:04:16","modified_gmt":"2026-09-04T10:04:16","slug":"hepa-minipleat-filter","status":"publish","type":"filtro","link":"https:\/\/spm-macchine.com\/en\/filters\/air-gas\/hepa-minipleat-filter\/","title":{"rendered":"HEPA Minipleat Filter"},"content":{"rendered":"<p><strong>Fiberglass: The Most Fragile Material Processed by SPM<\/strong><\/p>\n<p>Fiberglass for HEPA filters is the most fragile material routinely processed by SPM. This changes the priorities of the production line.<\/p>\n<p>Before speed, pleat pitch accuracy is the key factor. The range is between 1.5 and 4 mm, with guaranteed repeatability of \u00b10.1 mm. Without constant tension control during feeding, such thin media can tear or produce irregular pleats.<\/p>\n<p>The 91XPL\/91XSPL pleating machines and the dedicated 91XPM integrate a tension control system for this reason. Production speed ranges from 15 to 20 meters per minute, depending on the selected pleat pitch.<\/p>\n<p><strong>Hot-Melt Application: Up to 48 Nozzles per Side<\/strong><\/p>\n<p>For separators between the pleats, SPM uses hot-melt application. The lines can be equipped with up to 48 heated nozzles per side. Each nozzle has a dedicated sensor with temperature control within \u00b11 \u00b0C.<\/p>\n<p>The adhesive can be applied in four modes: continuous bead, intermittent bead, dots, or Foam technology (foamed adhesive). The choice depends on the weight of the filter pack and the rigidity required for the finished filter.<\/p>\n<p><strong>ISO 7 Environments and H13\/H14 Classes: What SPM Guarantees<\/strong><\/p>\n<p>SPM has already validated production lines for filters compliant with EN 1822, H13 and H14 classes, in ISO 7 environments. This provides a solid starting point for manufacturers that need to qualify their production process for pharmaceutical or cleanroom customers.<\/p>\n<p>Certification of the finished filter remains the responsibility of the manufacturer, not the machine. However, having an already validated production line significantly reduces the initial qualification work.<\/p>\n","protected":false},"featured_media":3331,"template":"","meta":{"_acf_changed":false,"content-type":""},"categoria-filtro":[68],"class_list":["post-3485","filtro","type-filtro","status-publish","has-post-thumbnail","hentry","categoria-filtro-air-gas"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>HEPA Minipleat Filter Machines | SPM<\/title>\n<meta name=\"description\" content=\"SPM manufactures production lines for HEPA minipleat filters: pleat pitch from 1.5 to 4 mm, repeatability of \u00b10.1 mm, and up to 48 hot-melt nozzles per side. 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