{"id":"wpc-tech100-article-079-en","slug":"contact-angle-tests-on-wpc-surfaces","locale":"en","url":"https://woodplasticcomposite.net/guides/contact-angle-tests-on-wpc-surfaces/","title":"Contact-angle tests on WPC surfaces","answer":"A contact-angle measurement describes a particular liquid interacting with a prepared surface under defined conditions. It should not be translated directly into a claim that a complete WPC product is waterproof.","author":"NFC & WPC Knowledge Reference","faqIds":["wpc-tech100-faq-079-en"],"tagIds":[],"noindex":false,"related":["wpc-tech100-article-080-en"],"version":1,"modified":"2026-10-15","reviewer":"","sections":[{"id":"technical-context","text":"Surface roughness, contamination, preparation and measurement timing can influence the result. A capped face, a cut end and a sanded surface may represent different questions. One photograph of a water droplet cannot describe the full product.","heading":"Technical context","references":[],"url":"https://woodplasticcomposite.net/guides/contact-angle-tests-on-wpc-surfaces/#technical-context"},{"id":"verification-plan","text":"Specify the liquid, procedure and surface condition. Measure representative locations and report variability. Use suitable additional tests when the actual concern is water uptake, cleaning, bonding or exposure durability.","heading":"What to measure and document","references":[],"url":"https://woodplasticcomposite.net/guides/contact-angle-tests-on-wpc-surfaces/#verification-plan"},{"id":"practical-decision","text":"Keep the conclusion narrow. A surface-treatment study may support further development, but product claims require evidence matching the use. Ask suppliers to distinguish surface wetting observations from long-term moisture performance of the installed profile.","heading":"Implications for development and specification","references":[],"url":"https://woodplasticcomposite.net/guides/contact-angle-tests-on-wpc-surfaces/#practical-decision"},{"id":"reading-scope","text":"An experimental comparison of plasma surface treatments for WPC adhesion. Use the linked work as related reading. The practical checks above are editorial recommendations, not reported test results or a substitute for product qualification.","heading":"Related reading and evidence limits","references":[1],"url":"https://woodplasticcomposite.net/guides/contact-angle-tests-on-wpc-surfaces/#reading-scope"}],"seoTitle":"Contact-angle tests on WPC surfaces | WPC Reference","topicIds":[],"published":"2026-10-15","tableText":"Review step | Evidence to retain\nMaterial and geometry | Exact specimen or product identity\nVerification | Method, conditions and individual observations\nDecision | Approved scope and documented limitations","takeaways":"Surface roughness, contamination, preparation and measurement timing can influence the result.\nSpecify the liquid, procedure and surface condition.\nKeep the conclusion narrow.","aiAssisted":true,"categoryId":"wpc-tech100-category-3","reviewedAt":"","change_note":"New focused technical draft; not a product certification or production recipe.","description":"A contact-angle measurement describes a particular liquid interacting with a prepared surface under defined conditions.","heroImageId":"","referenceIds":["wpc-tech100-ref-plasma"],"review_status":"AI-assisted English editorial draft. Human technical review has not been recorded.","table_caption":"Evidence checklist for contact-angle tests on wpc surfaces","seoDescription":"A contact-angle measurement describes a particular liquid interacting with a prepared surface under defined conditions.","translationGroup":"wpc-tech100-079-2026","references":[{"url":"https://doi.org/10.3390/polym10060643","type":"web","title":"Plasma-treated WPC: adhesion, ageing and surface properties","noindex":false,"accessed":"2026-10-14","seoTitle":"Plasma-treated WPC: adhesion, ageing and surface properties","publisher":"Polymers","description":"Related reading; scope and limitations are identified in each article.","seoDescription":"Related reading; scope and limitations are identified in each article."}],"faqs":[{"question":"What evidence is needed for contact-angle tests on WPC surfaces?","answer":"Specify the liquid, procedure and surface condition. Measure representative locations and report variability. Use suitable additional tests when the actual concern is water uptake, cleaning, bonding or exposure durability."}]}