Izbira lepila za izdelavo slojnatega kompozita iz bukovega furnirja : diplomski projekt

Rajšp, Andrej (author), Šernek, Milan (mentor), Šega, Bogdan (reviewer)

Cilj raziskave je bil izbrati najustreznejše lepilo za izdelavo slojnatega kompozita v obliki cevi za kasnejšo izdelavo lesenega kolesa. Ker je proces izdelave zahteven, je bila izbira ustrezne tehnologije in lepila ključna. Izbrali smo 3 lepila, ki naj bi ustrezala z vidika trdnosti in trajnosti, in sicer poliuretansko lepilo Mitopur E45, poliestrsko lepilo Colpoly 7201 ter epoksidno lepilo Epox 210. Najprej smo z vsakim lepilom izdelali lepljenec iz 2 bukovih lamel, iz katerih smo kasneje izžagali preizkušance za ugotavljanje natezno strižne trdnosti lepilnih spojev po standardu SIST EN 205. Pred testiranjem smo preizkušance izpostavili različnim pogojem, kot jih predpisuje standard SIST EN 12765. Ugotovili smo, da je bilo poliuretansko lepilo najprimernejše za lepljenje, saj je v vseh pripravah doseglo najboljše rezultate. Pri epoksidnem lepilu smo imeli težave s prehitro penetracijo v furnir, kar se je odražalo tudi pri rezultatih, saj so nekateri preizkušanci imeli veliko trdnost, medtem ko so nekateri razpadli že pri pripravi. S poliestrskim lepilom smo izmed vseh lepil dosegli najmanjšo trdnost spoja.

• Language: Slovenian
• Keywords: slojnat kompozit, natezno strižna trdnost, poliuretansko lepilo, epoksidno lepilo, poliestrsko lepilo
• Work type: Diploma project paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [A. Rajšp]
• Year: 2014
• Number of pages: VIII, 27 f.
• PID: 20.500.12556/RUL-117672
• UDC: 630*824.9
• COBISS.SI-ID: 2278537
• Publication date in RUL: 20.07.2020

RAJŠP, Andrej, 2014, Izbira lepila za izdelavo slojnatega kompozita iz bukovega furnirja : diplomski projekt [online]. Bachelor’s thesis. Ljubljana : A. Rajšp. [Accessed 22 June 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=117672

Secondary language

• Language: English
• Title: Selecting right glue to make a layer composite from beech veneer

Abstract

To build a wooden bicycle we need to make a layer composite from beech veneer. The most critical in this difficult process is a choice of glue. Therefore, we selected 3 the most suitable adhesives: polyurethane adhesive Mitopur E45, polyester resin Colpoly 7201 and epoxide resin Epox 210. We made tests with standard SIST EN 205, which described determination of tensile shear strength of lap joints. First we glued together 2 panels of beech, than we had to cut it to the standardized specimens. Tests were made by the same standard. Before we started with tests, we prepared the specimens with some procedures, which are described in standard SIST EN 12765. We determined that the best glue for our composite was polyurethane glue, which was the best in all the conditions from standard. We had problems with penetration at gluing with epoxide resin. That is clear from results, because some specimens had good results, but others have disintegrated during preparation process. Polyester resin was the worst.

• Keywords: layer composite, tensile shear strength, polyurethane adhesive, epoxide resin, polyester resin