Toni Šauperl (Author), Jaša Saražin (Author), Milan Šernek (Author)

Abstract

V prispevku je predstavljen razvoj strižne trdnosti dveh polivinilacetatnih (PVAc) lepil: Mekol D3 in Mekol SPECIAL pri lepljenju furnirja v odvisnosti od časa stiskanja. Poleg testiranja trdnosti lepilnega spoja po vročem stiskanju smo proučevali tudi vpliv hlajenja na končno trdnost PVAc lepilnega spoja. Graditev strižne trdnosti PVAc lepilnega spoja med vročim stiskanjem smo ugotavljali s pomočjo sistema za avtomatizirano vrednotenje zlepljenosti (ABES). Temperatura stiskanja je bila konstantna in je znašala 80 °C medtem, ko smo čas stiskanja povečevali od 30 do 300 sekund s 30-sekundnim intervalom. Vpliv hlajenja na končno trdnost PVAc lepilnega spoja smo ugotavljali po 5-sekundnem in 30-sekundnem hlajenju. Na podlagi raziskave smo ugotovili, da je strižna trdnost PVAc lepilnih spojev naraščala s časom stiskanja in se je po določenem času približala konstantni vrednosti. Ugotovili smo značilne razlike v trdnosti spojev, zlepljenjih z Mekol D3 in Mekol SPECIAL ter statistično značilen vpliv hlajenja na trdnost lepilnih spojev.

Keywords

ABES;furnir;lepilni spoji;PVAc;strižna trdnost;temperatura;

Data

Language: Slovenian
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
UDC: 630*824.839
COBISS: 44527875 Link will open in a new window
ISSN: 0024-1067
Parent publication: Les
Views: 742
Downloads: 221
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Other data

Secondary language: English
Secondary title: Development of polyvinyl acetate adhesive bond strength at gluing of veneer
Secondary abstract: This article presents the development of the shear strength of two polyvinyl acetate (PVAc) adhesives: Mekol D3 and Mekol SPECIAL when bonding veneer depending on pressing time. Besides testing the strength of the adhesive bond after hot pressing, we also investigated the effect of cooling on the final strength of PVAc adhesive bonds. The shear strength development of the PVAc adhesive bond during hot pressing was determined using an Automated Bonding Evaluation System (ABES). The pressing temperature was constant and was 80 °C, while the pressing time was extended from 30 to 300 seconds in 30-second intervals. The effect of cooling on the final strength of the PVAc adhesive bond was determined after cooling time of 5 and 30 seconds, respectively. Based on the investigations, we found that the shear strength of PVAc adhesive bonds increased with the pressing time and approached to a constant value after a certain time. We found significant differences in the strength of adhesive bonds glued with Mekol D3 and Mekol SPECIAL and a statistically significant effect of cooling on the strength of the adhesive bonds.
Secondary keywords: veneer;adhesive bond;shear strength;temperature;
URN: URN:NBN:SI
Type (COBISS): Article
Pages: str. 97-106
Volume: ǂLetn. ǂ69
Issue: ǂšt. ǂ2
Chronology: 2020
DOI: 10.26614/les-wood.2020.v69n02a04
ID: 12717717