Kakovost zlepljenosti gradnikov po debelini plošč iz iveri in vlaken

Drešček, Tom (author), Medved, Sergej (mentor)

V diplomski nalogi smo ugotavljali spreminjanje kakovosti zlepljenosti po debelini plošč iz iveri in vlaken. Testirali smo iverno, OSB in MDF ploščo. Določili smo pet območij po debelini vsake plošče na katerih smo izdelali zareze, kar je predstavljalo območja v plošči z različno gostoto. Namen izdelave zarez je bil ugotoviti razslojno trdnost plošče v točno določenem območju. Ugotovili smo, da ima iverna plošča najvišjo korelacijo med razslojno trdnostjo in gostoto posameznega območja, sledi ji OSB plošča, najmanjšo korelacijo pa ima MDF plošča. Pri vseh ploščah smo ugotovili najvišjo razslojno trdnost v zunanjih slojih, kar odgovarja tudi območju z najvišjo gostoto, medtem ko so bile najnižje razslojne trdnosti ugotovljene v območjih z najnižjo gostoto, kar pa ni bilo vedno na sredini plošče. Pri iverni in MDF plošči smo ugotovili, da je kakovost zlepljenosti območij prehoda iz zunanjega v srednji sloj in srednjega območja skoraj enaka. Testirana OSB plošča ima v spodnjih delih plošče slabšo kakovost zlepljenosti zaradi morfoloških značilnosti gradnikov, ki jo sestavljajo.

• Language: Slovenian
• Keywords: iverna plošča, OSB plošča, vlaknena plošča, razslojna trdnost, gostotni profil
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Publisher: [T. Drešček]
• Year: 2019
• PID: 20.500.12556/RUL-110976
• UDC: 630*862.2
• COBISS.SI-ID: 3117705
• Publication date in RUL: 21.09.2019

Secondary language

• Language: English
• Title: Bond quality related to the thickness of particle- and fibre- based panel

Abstract

In this paper, the bond quality related to the thickness of particle- and fibre- based panels was tested. Particleboard, OSB and MDF boards were tested. Five areas across the thickness of each panel were defined, where grooves were cut out, representing the area with different densities. The goal of making the grooves was to determine the bond strength of the panel in a precisely specified area. We found out that the particleboard has the highest correlation between the bond strength and the density of a particular area, followed by the OSB board, and lastly by the MDF board with the lowest correlation. We determined that the highest bond strength was in the area close to surface, which corresponds with the area of the highest density. The lowest bond strength was found in the areas with the lowest density; however that was not always in the middle of the board. For particleboard and MDF the bond strength in the surface to core layer transition area and in the core layer were almost the same. The tested OSB board has a lower bond quality in the lower surface layer due to the strands morphological characteristics.

• Keywords: particleboard, oriented strand board, fibreboard, internal bond, vertical density profile