{"id":46876,"date":"2026-03-14T01:27:50","date_gmt":"2026-03-14T01:27:50","guid":{"rendered":"https:\/\/aso-labor.de\/wenn-der-lack-nicht-haftet-grenzflaechenanalyse\/"},"modified":"2026-03-14T01:40:12","modified_gmt":"2026-03-14T01:40:12","slug":"wenn-der-lack-nicht-haftet-grenzflaechenanalyse","status":"publish","type":"post","link":"https:\/\/aso-labor.de\/en\/wenn-der-lack-nicht-haftet-grenzflaechenanalyse\/","title":{"rendered":"When Paint Doesn’t Adhere \u2013 A Look at the Interface"},"content":{"rendered":"\t\t
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“The paint is pulling back.”<\/em>
“We keep receiving complaints.”<\/em>
“Everything looks clean in production \u2013 but something isn’t right.”<\/em><\/p>

We regularly receive such inquiries when painted plastic components suddenly exhibit adhesion problems. The problem often only becomes visible in the finished product: the paint forms droplets, so-called wetting defects, or partially detaches again. <\/p>

However, the actual cause almost always lies where it cannot be seen \u2013 in the uppermost nanometers of the surface.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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The Problem Lies in the Nanometer Range<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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For paint to adhere, the surface must be wettable. The chemical composition of the interface between plastic and coating is decisive. <\/p>

Even extremely thin contamination layers \u2013 for example from silicone oils, release agents, or migrating additives \u2013 can alter the surface energy in such a way that the paint does not form a stable bond.<\/p>

The difficulty:<\/strong> We are talking about layers in the range of 5\u201310 nanometers. This corresponds to approximately one-thousandth of the thickness of a human hair. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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A Concrete Case from Practice<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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A typical paint defect appeared at a client’s facility:<\/p>