{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,30]],"date-time":"2026-03-30T10:58:33Z","timestamp":1774868313760,"version":"3.50.1"},"reference-count":36,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2026,3,29]],"date-time":"2026-03-29T00:00:00Z","timestamp":1774742400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Polish Minister of Science and Higher Education\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t              https:\/\/ror.org\/05dwvd537"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>This study investigates the screw withdrawal resistance (SWR) of hollow wood\u2013plastic composite (WPC) door frames, which serve as moisture-resistant alternatives to traditional wood-based materials. The tested WPC, characterised by a density of 1.33 g\/cm3 and a polymer-bound lignocellulosic filler, exhibits superior dimensional stability and low water absorption\u2014under 4% after 24 h of immersion. The research focuses on how the unique chambered geometry of these industrial profiles affects the anchoring of 20 mm conical wood screws used to mount essential fittings such as hinges and lock catches. The SWR was determined using a universal testing machine in accordance with the modified EN 320 standards. Results indicate that the installation location within the profile significantly dictates load-bearing capacity: the band profile (lock catch) achieved an average SWR of 525.65 N, while the beam profile (hinge) averaged only 275.25 N. This performance gap arises because screws anchor only into internal \u201cribs\u201d rather than the full material depth. Since these values are considerably lower than those of traditional particleboard (~1364\u20131775 N), the study highlights a critical need to optimise screw dimensions to ensure the structural stability and safety of hollow WPC door systems.<\/jats:p>","DOI":"10.3390\/ma19071351","type":"journal-article","created":{"date-parts":[[2026,3,30]],"date-time":"2026-03-30T09:57:24Z","timestamp":1774864644000},"page":"1351","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Screw Withdrawal Resistance from WPC Profiles Used in Door Frame Production"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9356-0426","authenticated-orcid":false,"given":"Zbigniew","family":"Potok","sequence":"first","affiliation":[{"name":"Department of Furniture Design, Faculty of Forestry and Wood Technology, Pozna\u0144 University of Life Sciences, 60-637 Pozna\u0144, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zdzis\u0142aw","family":"Kwidzi\u0144ski","sequence":"additional","affiliation":[{"name":"Department of Furniture Design, Faculty of Forestry and Wood Technology, Pozna\u0144 University of Life Sciences, 60-637 Pozna\u0144, Poland"},{"name":"PORTA KMI Poland, 84-239 Bolszewo, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3607-8128","authenticated-orcid":false,"given":"Marta","family":"P\u0119dzik","sequence":"additional","affiliation":[{"name":"Department of Furniture Design, Faculty of Forestry and Wood Technology, Pozna\u0144 University of Life Sciences, 60-637 Pozna\u0144, Poland"},{"name":"\u0141ukasiewicz Research Network\u2014Pozna\u0144 Institute of Technology, 6 Ewarysta Estkowskiego St., 61-755 Pozna\u0144, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5432-4738","authenticated-orcid":false,"given":"Krzysztof","family":"Wiaderek","sequence":"additional","affiliation":[{"name":"Department of Furniture Design, Faculty of Forestry and Wood Technology, Pozna\u0144 University of Life Sciences, 60-637 Pozna\u0144, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-2160-4809","authenticated-orcid":false,"given":"Barbara","family":"Pra\u0142at","sequence":"additional","affiliation":[{"name":"Department of Furniture Design, Faculty of Forestry and Wood Technology, Pozna\u0144 University of Life Sciences, 60-637 Pozna\u0144, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4957-1042","authenticated-orcid":false,"given":"Tomasz","family":"Rogozi\u0144ski","sequence":"additional","affiliation":[{"name":"Department of Furniture Design, Faculty of Forestry and Wood Technology, Pozna\u0144 University of Life Sciences, 60-637 Pozna\u0144, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,3,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"De Ligne, L., Van Acker, J., Baetens, J.M., Omar, S., De Baets, B., Thygesen, L.G., Van Den Bulcke, J., and Thybring, E.E. 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