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Transcript of RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF) 1 Rubberwood...
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Rubberwood preservation by friendly preservatives
Mingliang Jiang, Zhijun WangResearch Institute of Wood Industry, Chinese
Academy of Forestry, Beijing 100091, China
Dec 8-10, 2008 Haikou, China
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Contents1. Brief introduction of wood and rubberwood pre
servation
2. Treatment specification and quality control
3. Laboratory test of Antistain and Antimold Formulations on rebberwood (ITTO 1996-1998)
4. Laboratory test of Antistain and Antimold Formulations (2003-2007)
5. Technical report of vacuum pressure treatment by NaPCP free preservative during 2006-2007
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
1 Brief introduction of wood and rubberwood (RW) preservation
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Wood preservation in China
Railway sleeper by creosote Exterior uses treated by CCA/ACQ/CuAz Indoor uses of rubberwood by boron
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
ACQ treated Chinese fir for exterior use, Anhui, 2006
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
RW Preservation in China Began on 1970’s Today mainly by vacuum/pressure
process
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Sawing of rubberwood
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
The rubberwood treated
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Some facts on RW preservation:
The rubberwood timber production in China is about 0.4 millionM3 /a in the recent years
100 rubberwood treating plants in China
The RW timber mainly used for furniture making
RW primary products: timber, particleboard, plywood
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
2 Treatment specification and quality control
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Specification for the treated wood:LY/T1636-2005
Specification for the treated rubberwood: No specific standard currently Usually adopt 0.4 % BAE (Malaysia for wood) Ref: LY/T1636-2005(wood for C1: 2.8kg/m3
B2O3)
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Solution for checking boron
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Drying rubberwood, Red-Present of boron; Yellow- without boron
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
No spraying
Fresh treated rubberwood spraying with reagent solution
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Retention determination
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
By chemical analysis of boron:Titration,ICP etc
Retention calculation by treating record
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Treating record for each charge at Lezhong Wood Factory, Hainan
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
3 Laboratory test of Antistain and Antimold Formulations (1996-1998)
3.1 Experimental methods
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Rubberwood sample size: 50×20×1 mm, maple 40×20×3 mm.
Fungicidal formulations for stain control: F1, F2: chlorothalonil/carbendizam fungicides.
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Ranking Standard 1 - Clean: stain or mold covering less than
5% upper surface. 2 - Light stain: stain or mold covering 5 -
20% upper surface. 3 - Moderate stain: stain or mold covering
20-40 % upper surface. 4 - Heavy stain: stain or mold covering more
than 40% upper surface.
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Table 1. Comparison of the effectiveness of anti-sapstain treat
ments against Botryodiplodia theobromae Pat. on rubberwood Anti-sapstain Treatment Average Std
Untreated Control 4.0 0.0
0.25%NaPCP 4.0 0.0
0.5%NaPCP 3.0 0.0
1%NaPCP 3.0 0.0
1.0%F1( F) 3.0 0.0
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
0.20%F2 2.0 0.0
0.40%F2 1.0 0.0
0.5%F1( E) +0.10%F2 1.0 0.0
0.5%F1( E) +0.20%F2 1.0 0.0
0.5%F1( F) +0.05%F2 1.0 0.0
0.5%F1( F) +0.10%F2 1.0 0.0
0.5%F1( F) +0.20%F2 1.0 0.0
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Conclusion for 3
The formulations containing 0.05-0.2% F2, mixed with 0.5%F1 or 0.40%F2 alone are effectiveness for controlling Botryodiplodia theobromae in lab test.
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
4 Laboratory test of Antistain and Antimold Formulations (2003-2007)
4.1 Experimental methods
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
4.1.1 Fungal species and their characteristic
Five fungal species were identified as : Bt: Botryodiplodia theobromae Pat., Fv: Fusarium verticillioides(Sacc.)Nirenberg, Th: Trichoderma harzianum Rifai, Tv: Trichoderma viride Pers., Pp: Penicillium purpurogenum Stoll.
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
4.1.2 Fungicides for the test
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Table 2: Fungicidal formulations for the stain control test
Formulations Common nameFormulation
types
CTL Chlorothalonil Emulsion
CBZ Carbendazim50% wetable powe
r
Benomyl Benomyl50% wetable powe
r
BACDodecyl dimethyl benzyl amm
onium chlorideWater solution
Cu-8 Copper oxineAcetic acid
solution
DDACDidecyl dimethyl ammonium c
hlorideWater solution
PPZ Propiconazole Emulsion
TEB Tebuconazole Emulsion
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
4.1.3 Method for stain control
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Table 3: Result of the stain control test
FormulationsConcentrations of a. i. B t
CBZ
0.001% 36.6
0.005% 39.2
0.010% 40.1
0.02% 40.6
0.10% 41.2
0.20% 43.6
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
FormulationsConcentrationsof a. i. B t
benomyl
0.001% 32.4
0.005% 35.5
0.010% 37.0
0.02% 38.1
0.10% 40.7
0.20% 50.6
Contd
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Contd
Formulations Concentrationsof a. i. B t
CBZ+Cu-8
0.01%+0.01% 21.4
0.01%+0.05% 22.3
0.01%+0.1% 23.8
0.1%+0.2% 42.3
0.1%+0.5% 47.2
0.2%+0.5% 59.7
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Contd
Formulations Concentrationsof a. i. B t
Benomyl+Cu-8
0.005%+0.01% 42.7
0.01%+0.01% 43.1
0.02%+0.01% 46.1
0.02%+0.02% 48.9
0.1%+0.02% 50.4
0.2%+0.08% 52.9
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Conclusion for 4
Some formulations containing CBZ, Benomyl, Cu-8 have excellent effectiveness for the controlling of Botryodiplodia theobromae Pat.
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
5 Technical report of vacuum pressure treatment by NaPCP free preservative during 2006-2007
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
5.1 Materials and method
5.1.1 Materials Fresh rubberwood timber.
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Formulations
Boric acid Borax F2
Site 1 0.50 1.000.035-
0.045
Site 2 1.00 0.200.035-
0.050
5.1.2 Preservatives
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
5.1.3 Test sites and treating procedure
Vacuum pressure treatment was used in the
following procedure.
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Site 1 : Lezhong Wood Factory, Hainan Nongken Wood Co , duration : Aug 3, 2006– May 31, 2007.
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Site 1: Schedule for the rubberwood Vacuum / Pressure treatment
Phase Vacuum / Pressure (Mpa) Duration (min)
Initial vacuum 0.02 15
Pressure 1.2 35
Final vacuum 0.015 10
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Fungicide F2 for stain control made in Jiangsu, China
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Tank for preparation of treating solution at Lezhong wood plant
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Site 2 : Cangjiang Wood Plant, Xishuangbanna, Yunnan Province. duration : July 24, 2006– Oct 31, 2006.
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Site2: Schedule for the rubberwood
Vacuum / Pressure treatment Phase Vacuum / Pressure (Mpa) Duration (min)
Initial vacuum 0.02 15
Pressure 1.1 60
Final vacuum 0.02 10
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Tank for preparation of treating solution in Cangjiang wood plant, Yunnan
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
RW timber before treatment
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Air drying after treatment prior to kiln
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
5.2 Results
This field demonstration indicated that F2 could prevent the treated timber for 15-20 days from stain and mold during air drying.
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Fungicide carbendazim (F2) can be used for stain and mold control instead of NaPCP.
Conclusion for 5
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Related publications of this RW project:
Mingliang Jiang, Terry L. Highley, Leslie Ferge, Thomas L. Woods. Laboratory Evaluation of Chrolothalonil Formulation for Stain and Mold Control on Rubberwood and Maple, International Research Group on Wood Preservation, IRG/WP 98-30175. 29th IRG, Maastricht, Netherlands, June 14-19, 1998.
Mingliang Jiang. Polit test of antisapstain and mold formulations on rubberwood, China Wood Industry (Chinese), 2001,2
Mingliang Jiang. China Wood Industry (Chinese), 1998, 12(3). Mingliang Jiang. Current Research Situation of the New Wood P
reservative Chlorothalonil, China Wood Industry, 1997,11(4), 21-22.
Xiuying Liu, Mingliang Jiang. Currently Situation of Rubberwood Processing and Utilization Technology in China, China Wood Industry, 1997, 11(5), 6-8.
Mingliang Jiang et al. Overview on Rubberwood Preservation Technology, China Wood Industry, 1996, 10(6), 22-24.
ITTO technical report: Currently Situation of Rubberwood Processing and Utilization Technology in China, CRIWI, Beijing, 1995.
Mingliang Jiang et al. Laboratory test of blue stain control by chemicals, IRG 07-30430
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
The support and cooperation of Lezhong and Cangjiang wood plant for the field treatment are much appreciated.