{"id":18,"date":"2020-05-27T23:40:20","date_gmt":"2020-05-27T23:40:20","guid":{"rendered":"https:\/\/hotmelts.eu\/?page_id=18"},"modified":"2021-09-20T10:11:11","modified_gmt":"2021-09-20T10:11:11","slug":"reactive-pur","status":"publish","type":"page","link":"https:\/\/hotmelts.eu\/hu\/reactive-pur\/","title":{"rendered":"Reakt\u00edv PUR"},"content":{"rendered":"<p>A reakt\u00edv olvad\u00e9k ragaszt\u00f3k poliuret\u00e1non (PUR) alapulnak.<\/p>\n\n\n\n<p>A tapad\u00e1si reakci\u00f3 sorrendje<br>A nedvess\u00e9gre kem\u00e9nyed\u0151 olvad\u00e9k ragaszt\u00f3k k\u00e9tl\u00e9pcs\u0151s reakci\u00f3val k\u00f6t\u0151dnek:<\/p>\n\n\n\n<p>Az els\u0151 szakaszban a ragaszt\u00f3 fizikai r\u00f6gz\u00edt\u0151 mechanizmuson megy kereszt\u00fcl, amely bizonyos m\u00e9rt\u00e9k\u0171 szil\u00e1rds\u00e1got k\u00f6lcs\u00f6n\u00f6z a tapad\u00e1snak. Ez az er\u0151ss\u00e9g elegend\u0151 a tov\u00e1bbi feldolgoz\u00e1shoz vagy sz\u00e1ll\u00edt\u00e1shoz.<\/p>\n\n\n\n<p>A m\u00e1sodik szakaszban, amely \u00f3r\u00e1kt\u00f3l napokig tarthat a ragaszt\u00f3anyag t\u00edpus\u00e1t\u00f3l f\u00fcgg\u0151en, k\u00e9miai t\u00e9rh\u00e1l\u00f3sod\u00e1s t\u00f6rt\u00e9nik. Ez a k\u00e9miai reakci\u00f3 a nedvess\u00e9gtartalomt\u00f3l \u00e9s a tapad\u00f3 k\u00f6t\u00e9s leveg\u0151 p\u00e1ratartalomhoz val\u00f3 hozz\u00e1f\u00e9rhet\u0151s\u00e9g\u00e9t\u0151l f\u00fcgg. A forr\u00f3 olvad\u00e9k ragaszt\u00f3 reakci\u00f3ja ut\u00e1n elvesz\u00edti h\u0151re l\u00e1gyul\u00f3 tulajdons\u00e1gait, vagyis nem lesz \u00fajra puha, m\u00e9g akkor sem, ha a ragasztand\u00f3 t\u00e1rgy felmelegszik. A kapott h\u0151re kem\u00e9nyed\u0151 kiv\u00e9telesen j\u00f3 poliuret\u00e1n tapad\u00e1si \u00e9rt\u00e9kekkel rendelkezik, nagy szil\u00e1rds\u00e1ggal, nagy h\u0151\u00e1ll\u00f3s\u00e1ggal, j\u00f3 alacsony h\u0151m\u00e9rs\u00e9klet\u0171 rugalmass\u00e1ggal \u00e9s j\u00f3 old\u00f3szer\u00e1ll\u00f3s\u00e1ggal kombin\u00e1lva.<\/p>","protected":false},"excerpt":{"rendered":"<p>Reactive hot melt adhesives are based on polyurethane (PUR). Sequence of the adhesive reactionThe moisture-curing hotmelt [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-full-width.php","meta":{"footnotes":""},"class_list":["post-18","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Reactive PUR - Hotmelt adhesives<\/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:\/\/hotmelts.eu\/hu\/reactive-pur\/\" \/>\n<meta property=\"og:locale\" content=\"hu_HU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Reactive PUR - Hotmelt adhesives\" \/>\n<meta property=\"og:description\" content=\"Reactive hot melt adhesives are based on polyurethane (PUR). 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