{"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\/de\/reactive-pur\/","title":{"rendered":"Reaktiver PUR"},"content":{"rendered":"<p>Reaktive Schmelzklebstoffe basieren auf Polyurethan (PUR).<\/p>\n\n\n\n<p>Reihenfolge der Klebereaktion<br>Die feuchtigkeitsh\u00e4rtenden Schmelzklebstoffe verbinden sich \u00fcber eine zweistufige Reaktion:<\/p>\n\n\n\n<p>In der ersten Stufe durchl\u00e4uft der Klebstoff einen physikalischen Abbindemechanismus, der der Haftung einen gewissen Grad an Festigkeit verleiht. Diese St\u00e4rke reicht aus, um eine weitere Verarbeitung oder einen weiteren Transport zu erm\u00f6glichen.<\/p>\n\n\n\n<p>In der zweiten Stufe, die je nach Art des Klebstoffs Stunden bis Tage dauern kann, findet eine chemische Nachvernetzung statt. Diese chemische Reaktion h\u00e4ngt vom Feuchtigkeitsgehalt und der Zug\u00e4nglichkeit der Klebeverbindung f\u00fcr Luftfeuchtigkeit ab. Nachdem der Schmelzklebstoff reagiert hat, verliert er seine thermoplastischen Eigenschaften, dh er wird nicht wieder weich, selbst wenn sich das zu verklebende Objekt erw\u00e4rmt. Der resultierende Duroplast weist au\u00dfergew\u00f6hnlich gute Polyurethan-Haftwerte auf, kombiniert mit hoher Festigkeit, hoher W\u00e4rmebest\u00e4ndigkeit, guter Niedertemperaturflexibilit\u00e4t und guter L\u00f6sungsmittelbest\u00e4ndigkeit.<\/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\/de\/reactive-pur\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\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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