PRODUCTION OF PLYWOOD PANELS FROM Pinus taeda USING VENEERS OF DIFFERING DENSITIES AND PHENOL-FORMALDEHYDE RESIN WITH HIGH AND LOW MOLECULAR WEIGHTS
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Cerne (Online) |
Texto Completo: | https://cerne.ufla.br/site/index.php/CERNE/article/view/906 |
Resumo: | This study aimed to evaluate the bonding quality of plywood panels from Pinus taeda using low and high molecular weight phenol-formaldehyde resin and veneers from three different density classes. The experiment consisted of six treatments, each of which produced three panels (replicates). Tests were conducted to evaluate glue line strength to shear stress after two boiling cycles and after 24 hours of cold water immersion. Also determined was the percentage of defects in wood samples. Results indicated that the density classes being assessed differed statistically. However, no significant difference was found between panels produced with high and panels produced with low molecular weight resin as to the mean values of glue line strength, whether subjecting them to two boiling cycles or after 24 hours of cold water immersion. Interactions between different density classes and adhesive formulations were found not significant either. Low molecular weight resin (BPM) and panels produced with higher density veneers were found to have better behavior, regarding both bonding strength and percentage of defects. It was concluded that the bonding quality of plywood panels from Pinus taeda was satisfactory after using different densities of veneer and also high and low molecular weight phenolic resins. All treatments were found to comply with minimum requirements established in European standard EN 314-1/1993, which addresses bonding quality of plywood panels. |
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Cerne (Online) |
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PRODUCTION OF PLYWOOD PANELS FROM Pinus taeda USING VENEERS OF DIFFERING DENSITIES AND PHENOL-FORMALDEHYDE RESIN WITH HIGH AND LOW MOLECULAR WEIGHTSPlywood panelsPinus taedaveneersphenol-formaldehyde.This study aimed to evaluate the bonding quality of plywood panels from Pinus taeda using low and high molecular weight phenol-formaldehyde resin and veneers from three different density classes. The experiment consisted of six treatments, each of which produced three panels (replicates). Tests were conducted to evaluate glue line strength to shear stress after two boiling cycles and after 24 hours of cold water immersion. Also determined was the percentage of defects in wood samples. Results indicated that the density classes being assessed differed statistically. However, no significant difference was found between panels produced with high and panels produced with low molecular weight resin as to the mean values of glue line strength, whether subjecting them to two boiling cycles or after 24 hours of cold water immersion. Interactions between different density classes and adhesive formulations were found not significant either. Low molecular weight resin (BPM) and panels produced with higher density veneers were found to have better behavior, regarding both bonding strength and percentage of defects. It was concluded that the bonding quality of plywood panels from Pinus taeda was satisfactory after using different densities of veneer and also high and low molecular weight phenolic resins. All treatments were found to comply with minimum requirements established in European standard EN 314-1/1993, which addresses bonding quality of plywood panels. CERNECERNE2016-04-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://cerne.ufla.br/site/index.php/CERNE/article/view/906CERNE; Vol. 19 No. 2 (2013); 315-321CERNE; v. 19 n. 2 (2013); 315-3212317-63420104-7760reponame:Cerne (Online)instname:Universidade Federal de Lavras (UFLA)instacron:UFLAenghttps://cerne.ufla.br/site/index.php/CERNE/article/view/906/683Copyright (c) 2016 CERNEinfo:eu-repo/semantics/openAccessMuniz, Graciela Ines Bolzon deIwakiri, SetsuoViana, Lívia CássiaAndrade, MárioWeber, CristianeAlmeida, Vanessa Coelho2016-04-06T09:35:22Zoai:cerne.ufla.br:article/906Revistahttps://cerne.ufla.br/site/index.php/CERNEPUBhttps://cerne.ufla.br/site/index.php/CERNE/oaicerne@dcf.ufla.br||cerne@dcf.ufla.br2317-63420104-7760opendoar:2024-05-21T19:54:11.115642Cerne (Online) - Universidade Federal de Lavras (UFLA)true |
dc.title.none.fl_str_mv |
PRODUCTION OF PLYWOOD PANELS FROM Pinus taeda USING VENEERS OF DIFFERING DENSITIES AND PHENOL-FORMALDEHYDE RESIN WITH HIGH AND LOW MOLECULAR WEIGHTS |
title |
PRODUCTION OF PLYWOOD PANELS FROM Pinus taeda USING VENEERS OF DIFFERING DENSITIES AND PHENOL-FORMALDEHYDE RESIN WITH HIGH AND LOW MOLECULAR WEIGHTS |
spellingShingle |
PRODUCTION OF PLYWOOD PANELS FROM Pinus taeda USING VENEERS OF DIFFERING DENSITIES AND PHENOL-FORMALDEHYDE RESIN WITH HIGH AND LOW MOLECULAR WEIGHTS Muniz, Graciela Ines Bolzon de Plywood panels Pinus taeda veneers phenol-formaldehyde. |
title_short |
PRODUCTION OF PLYWOOD PANELS FROM Pinus taeda USING VENEERS OF DIFFERING DENSITIES AND PHENOL-FORMALDEHYDE RESIN WITH HIGH AND LOW MOLECULAR WEIGHTS |
title_full |
PRODUCTION OF PLYWOOD PANELS FROM Pinus taeda USING VENEERS OF DIFFERING DENSITIES AND PHENOL-FORMALDEHYDE RESIN WITH HIGH AND LOW MOLECULAR WEIGHTS |
title_fullStr |
PRODUCTION OF PLYWOOD PANELS FROM Pinus taeda USING VENEERS OF DIFFERING DENSITIES AND PHENOL-FORMALDEHYDE RESIN WITH HIGH AND LOW MOLECULAR WEIGHTS |
title_full_unstemmed |
PRODUCTION OF PLYWOOD PANELS FROM Pinus taeda USING VENEERS OF DIFFERING DENSITIES AND PHENOL-FORMALDEHYDE RESIN WITH HIGH AND LOW MOLECULAR WEIGHTS |
title_sort |
PRODUCTION OF PLYWOOD PANELS FROM Pinus taeda USING VENEERS OF DIFFERING DENSITIES AND PHENOL-FORMALDEHYDE RESIN WITH HIGH AND LOW MOLECULAR WEIGHTS |
author |
Muniz, Graciela Ines Bolzon de |
author_facet |
Muniz, Graciela Ines Bolzon de Iwakiri, Setsuo Viana, Lívia Cássia Andrade, Mário Weber, Cristiane Almeida, Vanessa Coelho |
author_role |
author |
author2 |
Iwakiri, Setsuo Viana, Lívia Cássia Andrade, Mário Weber, Cristiane Almeida, Vanessa Coelho |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Muniz, Graciela Ines Bolzon de Iwakiri, Setsuo Viana, Lívia Cássia Andrade, Mário Weber, Cristiane Almeida, Vanessa Coelho |
dc.subject.por.fl_str_mv |
Plywood panels Pinus taeda veneers phenol-formaldehyde. |
topic |
Plywood panels Pinus taeda veneers phenol-formaldehyde. |
description |
This study aimed to evaluate the bonding quality of plywood panels from Pinus taeda using low and high molecular weight phenol-formaldehyde resin and veneers from three different density classes. The experiment consisted of six treatments, each of which produced three panels (replicates). Tests were conducted to evaluate glue line strength to shear stress after two boiling cycles and after 24 hours of cold water immersion. Also determined was the percentage of defects in wood samples. Results indicated that the density classes being assessed differed statistically. However, no significant difference was found between panels produced with high and panels produced with low molecular weight resin as to the mean values of glue line strength, whether subjecting them to two boiling cycles or after 24 hours of cold water immersion. Interactions between different density classes and adhesive formulations were found not significant either. Low molecular weight resin (BPM) and panels produced with higher density veneers were found to have better behavior, regarding both bonding strength and percentage of defects. It was concluded that the bonding quality of plywood panels from Pinus taeda was satisfactory after using different densities of veneer and also high and low molecular weight phenolic resins. All treatments were found to comply with minimum requirements established in European standard EN 314-1/1993, which addresses bonding quality of plywood panels. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-04-05 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://cerne.ufla.br/site/index.php/CERNE/article/view/906 |
url |
https://cerne.ufla.br/site/index.php/CERNE/article/view/906 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://cerne.ufla.br/site/index.php/CERNE/article/view/906/683 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2016 CERNE info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2016 CERNE |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
CERNE CERNE |
publisher.none.fl_str_mv |
CERNE CERNE |
dc.source.none.fl_str_mv |
CERNE; Vol. 19 No. 2 (2013); 315-321 CERNE; v. 19 n. 2 (2013); 315-321 2317-6342 0104-7760 reponame:Cerne (Online) instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Cerne (Online) |
collection |
Cerne (Online) |
repository.name.fl_str_mv |
Cerne (Online) - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
cerne@dcf.ufla.br||cerne@dcf.ufla.br |
_version_ |
1799874941973168128 |