Izdelava lesno plastičnega kompozita z uporabo visoko-frekvenčne stiskalnice

Simić, Alexander (author), Medved, Sergej (mentor)

Ugotavljali smo možnost uporabe visokofrekvenčne tehnologije za izdelavo lesno-plastičnega kompozita ter določitev optimalnih pogojev za stiskanje lesno-plastičnih kompozitov v visokofrekvenčni stiskalnici. Uporabili smo frakcije iveri manjše od 1 mm. Kot vezivo smo uporabili polietilen (PE). Za določitev optimalnih pogojev stiskanja smo izdelali tri serije plošč, kjer smo spreminjali čas stiskanja, vlažnost iveri in delež lesa. Osnova za določitev najbolj primernih pogojev stiskanja in strukture plošče sta bili natezna in upogibna trdnost. Za izdelavo lesno-plastičnih kompozitov v visokofrekvenčni stiskalnici se je kot optimalna izkazala vlažnost iveri 26 %, čas stiskanja 17,5 min pri izbirnem stikalu moči 3, anodnem toku 1 A in mrežnem toku 0,5 A. Optimalen delež lesa v kompozitu je med 50 % in 75 %. Izdelali smo še eno serijo, pri kateri smo primerjali lastnosti kompozita izdelanega v klasični in visokofrekvenčni stiskalnici. Kompozit izdelan v visokofrekvenčni stiskalnici je imel boljše lastnosti kot kompozit izdelan v klasični stiskalnici.

• Language: Slovenian
• Keywords: Visoka frekvenca, lesno-plastični kompozit, polietilen, les, iverje
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Publisher: [A. Simić]
• Year: 2023
• PID: 20.500.12556/RUL-150594
• UDC: 630*862
• COBISS.SI-ID: 166608131
• Publication date in RUL: 21.09.2023

Secondary language

• Language: English
• Title: Manufacturing of wood plastic composites with high-frequency press

Abstract

We investigated the possibility of using high-frequency technology for the production of wood-plastic composites and determining the optimal conditions for pressing of such composites in a high-frequency press. We used wood chip fractions smaller than 1 mm and polyethylene (PE) as the matrix. We made three series of panels to determine the optimal pressing conditions, varying pressing time, wood chip moisture content, and wood content. The basis for determining the most suitable pressing conditions and panel structure was tensile and flexural strength. For the production of wood-plastic composites in a high-frequency press, we found that the optimal wood chip moisture content was 26%, with an optimal pressing time of 17.5 minutes using a power selection switch set to 3, an anodic current of 1 A, and a current of 0.5 A. The optimal wood content in the composite was found to be between 50% and 75%. We also compared the properties of composites made in a traditional press and a high-frequency press. The composite made in the high-frequency press exhibited better properties than the one made in the traditional press.

• Keywords: High frequency, Wood-plastic composite, polyethylene, wood, chips