Effects of different pressures and veneer moisture content in adjacent layers on properties of PUF bonded plywood

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F24%3A43923994" target="_blank" >RIV/62156489:43410/24:43923994 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1080/01694243.2023.2248694" target="_blank" >https://doi.org/10.1080/01694243.2023.2248694</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/01694243.2023.2248694" target="_blank" >10.1080/01694243.2023.2248694</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effects of different pressures and veneer moisture content in adjacent layers on properties of PUF bonded plywood

Popis výsledku v původním jazyce

In practice, for the manufacture of plywood, the veneer is usually dried to a moisture level suitable for bonding. However, anatomical differences within and between veneer sheets are a significant factor and some of them may contribute to significant differences in moisture content (MC). The novelty of this work was to study the possibility of using wood veneers of different MC in adjacent layers in one structure of plywood panels and how this affects the physical and mechanical properties of the panels. The Norway spruce (Picea abies L. Karst) wood veneers with mean MC approximately of 2%, 5% and 7% and phenol-urea-formaldehyde (PUF) resin were used in the experiments. The five-layers plywood panels were manufactured at the two pressing pressures of 0.8 MPa and 1.2 MPa. There was no significant difference in the bending and bonding properties, but only wood failure as measured on bonding specimens which showed higher average values on specimens manufactured with high pressure during hot pressing. Higher differences in MC of each veneer with constant MC of the veneer stack didn&apos;t worse bending and bonding properties of plywood.

Název v anglickém jazyce

Effects of different pressures and veneer moisture content in adjacent layers on properties of PUF bonded plywood

Popis výsledku anglicky

In practice, for the manufacture of plywood, the veneer is usually dried to a moisture level suitable for bonding. However, anatomical differences within and between veneer sheets are a significant factor and some of them may contribute to significant differences in moisture content (MC). The novelty of this work was to study the possibility of using wood veneers of different MC in adjacent layers in one structure of plywood panels and how this affects the physical and mechanical properties of the panels. The Norway spruce (Picea abies L. Karst) wood veneers with mean MC approximately of 2%, 5% and 7% and phenol-urea-formaldehyde (PUF) resin were used in the experiments. The five-layers plywood panels were manufactured at the two pressing pressures of 0.8 MPa and 1.2 MPa. There was no significant difference in the bending and bonding properties, but only wood failure as measured on bonding specimens which showed higher average values on specimens manufactured with high pressure during hot pressing. Higher differences in MC of each veneer with constant MC of the veneer stack didn&apos;t worse bending and bonding properties of plywood.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Adhesion Science and Technology

ISSN

0169-4243

e-ISSN

1568-5616

Svazek periodika

38

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

1043-1052

Kód UT WoS článku

001065860200001

EID výsledku v databázi Scopus

2-s2.0-85170834881