Properties of Plywood Panels Composed of Thermally Densified and Non-Densified Alder and Birch Veneers

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F23%3A43922690" target="_blank" >RIV/62156489:43410/23:43922690 - isvavai.cz</a>

Alternative codes found

RIV/00216305:26110/23:PU147344

Result on the web

<a href="https://doi.org/10.3390/f14010096" target="_blank" >https://doi.org/10.3390/f14010096</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/f14010096" target="_blank" >10.3390/f14010096</a>

Result language

angličtina

Original language name

Properties of Plywood Panels Composed of Thermally Densified and Non-Densified Alder and Birch Veneers

Original language description

Ukrainian companies mainly use birch in the manufacture of plywood, but species, such as black alder, are not yet widely used in the manufacture of plywood due to their poorer properties. It is well known that thermal compression is often used to improve the properties of solid wood. Good lay-up schemes of veneer can maximize the advantages and minimize the disadvantages of these wood species, and generally improve the utility value of the plywood. This research aimed to develop plywood panels with two wood species and two types of veneer treatments in order to evaluate the influences of different lay-up schemes on the properties of the plywood. Five-layer plywood panels were formed with 16 different lay-up schemes using birch (Betula verrucosa Ehrh.) (B) and black alder (Alnus glutinosa L.) (A) veneers, which were non-densified (N) and thermally densified (D). The different lay-up schemes were used to identify opportunities to improve the mechanical and physical properties of the plywood by replacing the birch veneer in the plywood structure with an alternative alder veneer. The veneer sheets were thermally densified in a laboratory hot press at a temperature of 180 oC and pressure of 2 MPa for 3 min. The conducted study showed that the bending strength, modulus of elasticity and shear strength of mixed-species plywood (BD-AN-AN-AN-BD) increased by up to 31.5%, 34.4% and 16.8%, respectively, in comparison to those properties of alder plywood from non-densified veneer (AN-AN-AN-AN-AN), by positioning alder non-densified veneers in the core layers and birch densified veneers in the outer layers. Moreover, the surface roughness of plywood panels with outer layers of birch veneer was lower than that of panels with outer layers of alder veneer. It was shown that non-treated alder veneer, despite exhibiting somewhat lower strength properties than birch veneer, could be successfully used with proper lay-up schemes in the veneer-based products industry.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20502 - Paper and wood

Project

<a href="/en/project/FW01010579" target="_blank" >FW01010579: Innovative construction and technology of massive solid wooden panel</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

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

Name of the periodical

Forests

ISSN

1999-4907

e-ISSN

1999-4907

Volume of the periodical

14

Issue of the periodical within the volume

1

Country of publishing house

CH - SWITZERLAND

Number of pages

18

Pages from-to

96

UT code for WoS article

000915008900001

EID of the result in the Scopus database

2-s2.0-85146737017