Lathe check formation and their impact on evaluations of veneer-based panel bond quality

Anti Rohumaa; Christopher G. Hunt; Mark Hughes; Charles R. Frihart; Jaan Kers

Lathe check formation and their impact on evaluations of veneer-based panel bond quality

Anti Rohumaa, Christopher G. Hunt, Mark Hughes, Charles R. Frihart, Jaan Kers

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

1 Citation (Scopus)

Abstract

During the peeling of veneer, lathe checks as deep as 70 to 80% of the veneer thickness are formed. This study showed that during adhesive testing according to EN 314 deep lathe checks in birch (Betula pendula Roth) veneer significantly reduced the shear strength of phenol-formaldehyde (PF) bonded plywood, even though these checks are not mentioned in the standard. In addition, we show that specimens tested open can fail by a different mechanism than those pulled closed, especially when checks are deep. Lathe checks were also shown to influence bond strengths when using the Automated Bonding Evaluation System (ABES). These findings stress the importance of measuring lathe check depth and considering the orientations of checks during testing to get a better understanding of bond quality in veneer-based products.

Original language	English
Title of host publication	WCTE 2016 - World Conference on Timber Engineering
Publisher	Vienna University of Technology
Number of pages	8
ISBN (Electronic)	9783903039001
Publication status	Published - 2016
MoE publication type	A4 Article in a conference publication
Event	World Conference on Timber Engineering - Vienna, Austria Duration: 22 Aug 2016 → 25 Aug 2016 Conference number: 14 http://wcte2016.conf.tuwien.ac.at/home/

Conference

Conference	World Conference on Timber Engineering
Abbreviated title	WCTE
Country/Territory	Austria
City	Vienna
Period	22/08/2016 → 25/08/2016
Internet address	http://wcte2016.conf.tuwien.ac.at/home/

Keywords

Bond quality
Lathe checks
Percent wood failure
Plywood
Shear strength

OpenUrl availability

Full text

Cite this

@inproceedings{3222c2d138e846dcba0e17265e3be06d,

title = "Lathe check formation and their impact on evaluations of veneer-based panel bond quality",

abstract = "During the peeling of veneer, lathe checks as deep as 70 to 80% of the veneer thickness are formed. This study showed that during adhesive testing according to EN 314 deep lathe checks in birch (Betula pendula Roth) veneer significantly reduced the shear strength of phenol-formaldehyde (PF) bonded plywood, even though these checks are not mentioned in the standard. In addition, we show that specimens tested open can fail by a different mechanism than those pulled closed, especially when checks are deep. Lathe checks were also shown to influence bond strengths when using the Automated Bonding Evaluation System (ABES). These findings stress the importance of measuring lathe check depth and considering the orientations of checks during testing to get a better understanding of bond quality in veneer-based products.",

keywords = "Bond quality, Lathe checks, Percent wood failure, Plywood, Shear strength",

author = "Anti Rohumaa and Hunt, {Christopher G.} and Mark Hughes and Frihart, {Charles R.} and Jaan Kers",

year = "2016",

language = "English",

booktitle = "WCTE 2016 - World Conference on Timber Engineering",

publisher = "Vienna University of Technology",

address = "Austria",

note = "World Conference on Timber Engineering, WCTE ; Conference date: 22-08-2016 Through 25-08-2016",

url = "http://wcte2016.conf.tuwien.ac.at/home/",

}

TY - GEN

T1 - Lathe check formation and their impact on evaluations of veneer-based panel bond quality

AU - Rohumaa, Anti

AU - Hunt, Christopher G.

AU - Hughes, Mark

AU - Frihart, Charles R.

AU - Kers, Jaan

N1 - Conference code: 14

PY - 2016

Y1 - 2016

N2 - During the peeling of veneer, lathe checks as deep as 70 to 80% of the veneer thickness are formed. This study showed that during adhesive testing according to EN 314 deep lathe checks in birch (Betula pendula Roth) veneer significantly reduced the shear strength of phenol-formaldehyde (PF) bonded plywood, even though these checks are not mentioned in the standard. In addition, we show that specimens tested open can fail by a different mechanism than those pulled closed, especially when checks are deep. Lathe checks were also shown to influence bond strengths when using the Automated Bonding Evaluation System (ABES). These findings stress the importance of measuring lathe check depth and considering the orientations of checks during testing to get a better understanding of bond quality in veneer-based products.

AB - During the peeling of veneer, lathe checks as deep as 70 to 80% of the veneer thickness are formed. This study showed that during adhesive testing according to EN 314 deep lathe checks in birch (Betula pendula Roth) veneer significantly reduced the shear strength of phenol-formaldehyde (PF) bonded plywood, even though these checks are not mentioned in the standard. In addition, we show that specimens tested open can fail by a different mechanism than those pulled closed, especially when checks are deep. Lathe checks were also shown to influence bond strengths when using the Automated Bonding Evaluation System (ABES). These findings stress the importance of measuring lathe check depth and considering the orientations of checks during testing to get a better understanding of bond quality in veneer-based products.

KW - Bond quality

KW - Lathe checks

KW - Percent wood failure

KW - Plywood

KW - Shear strength

UR - http://www.scopus.com/inward/record.url?scp=85010930862&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:85010930862

BT - WCTE 2016 - World Conference on Timber Engineering

PB - Vienna University of Technology

T2 - World Conference on Timber Engineering

Y2 - 22 August 2016 through 25 August 2016

ER -

Lathe check formation and their impact on evaluations of veneer-based panel bond quality

Abstract

Conference

Keywords

OpenUrl availability

Other files and links

Fingerprint

Bioeconomy Research Infrastructure

Cite this

Lathe check formation and their impact on evaluations of veneer-based panel bond quality

Abstract

Conference

Keywords

OpenUrl availability

Other files and links

Fingerprint

Equipment

Bioeconomy Research Infrastructure

Cite this