{"id":178,"date":"2024-01-16T11:57:08","date_gmt":"2024-01-16T10:57:08","guid":{"rendered":"https:\/\/www.buehnen.de\/international\/blog\/?p=178"},"modified":"2023-12-13T11:59:03","modified_gmt":"2023-12-13T10:59:03","slug":"kohaesion-in-klebstoffen-das-geheimnis-um-die-innere-staerke","status":"publish","type":"post","link":"https:\/\/www.buehnen.de\/international\/blog\/2024\/01\/16\/kohaesion-in-klebstoffen-das-geheimnis-um-die-innere-staerke\/","title":{"rendered":"Koh\u00e4sion in Klebstoffen: Das Geheimnis um die innere St\u00e4rke"},"content":{"rendered":"\n

In the world of adhesives, cohesion refers to the forces that create the internal cohesion of the adhesive. During the bonding process, these forces must increase to ensure a permanent connection between the bonded substrates. A stable adhesive must therefore not only have strong adhesion to the surface, but also have pronounced cohesion in order to ensure internal cohesion.<\/p>\n\n\n\n

The construction of cohesion<\/strong><\/p>\n\n\n\n

The building of cohesion in an adhesive can occur in various ways.  This happens either through physical forces or through chemical cross-linking. This is referred to as physically setting or reactive adhesive systems.<\/p>\n\n\n\n

The hot adhesives are liquid when applied; the viscosity increases significantly as they cool. In addition, cohesion increases further due to partial crystallisation in the adhesive.<\/p>\n\n\n\n

The cohesive forces in detail<\/strong><\/p>\n\n\n\n

The cohesion in adhesives is based on different mechanisms:<\/p>\n\n\n\n

    \n
  1. Mechanical entanglement:<\/strong> Thread-like macromolecules or fibrous substances become entangled with each other, resulting in a stable structure.  <\/li>\n\n\n\n
  2. Chemical bonds:<\/strong> Reactive hot-melt adhesives form strong chemical bonds, which ensure a strong bond.<\/li>\n\n\n\n
  3. Physical interactions:<\/strong> Various forces, such as the van der Waals forces, hydrogen bonds or crystalline structures act between the adhesive molecules. These intermolecular forces further strengthen cohesion.  <\/li>\n<\/ol>\n\n\n\n

    Overall, cohesion is a fascinating interplay of physical and chemical forces that ensure the internal cohesion of adhesives and make them indispensable tools in various industries.  <\/p>\n\n\n\n

    We hope this explanation of cohesion helped you better understand the fascinating science behind adhesives.  <\/p>\n\n\n\n

    You can find out more in our <\/a>glossary under the heading \u201cCohesion\u201d.<\/a><\/p>\n\n\n\n

    \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

    Technical term on Tuesday: Cohesion \u2013 The internal cohesion of adhesives is crucial to ensure long-lasting connections. <\/p>\n","protected":false},"author":1,"featured_media":157,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[24],"tags":[],"class_list":["post-178","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-term-tuesday"],"jetpack_featured_media_url":"https:\/\/www.buehnen.de\/international\/blog\/wp-content\/uploads\/2023\/09\/thuesdays_facts.webp","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.buehnen.de\/international\/blog\/wp-json\/wp\/v2\/posts\/178","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.buehnen.de\/international\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.buehnen.de\/international\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.buehnen.de\/international\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.buehnen.de\/international\/blog\/wp-json\/wp\/v2\/comments?post=178"}],"version-history":[{"count":1,"href":"https:\/\/www.buehnen.de\/international\/blog\/wp-json\/wp\/v2\/posts\/178\/revisions"}],"predecessor-version":[{"id":179,"href":"https:\/\/www.buehnen.de\/international\/blog\/wp-json\/wp\/v2\/posts\/178\/revisions\/179"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.buehnen.de\/international\/blog\/wp-json\/wp\/v2\/media\/157"}],"wp:attachment":[{"href":"https:\/\/www.buehnen.de\/international\/blog\/wp-json\/wp\/v2\/media?parent=178"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.buehnen.de\/international\/blog\/wp-json\/wp\/v2\/categories?post=178"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.buehnen.de\/international\/blog\/wp-json\/wp\/v2\/tags?post=178"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}