1 RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF) Rubberwood preservation by friendly preservatives Mingliang Jiang, Zhijun Wang Research Institute of Wood Industry, C hinese 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) 1 Rubberwood preservation by friendly preservatives Mingliang Jiang, Zhijun.
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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
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)
Penetration check
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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
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.
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RESEARCH INSTITUTE OF WOOD INDUSTRY (CRIWI), CHINESE ACADEMY OF FORESTRY (CAF)
Thanks for your attention! wish you have a nice stay during the