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Rubberwood preservation by friendly preservatives

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Presentation on theme: "Rubberwood preservation by friendly preservatives"— Presentation transcript:

1 Rubberwood preservation by friendly preservatives
Mingliang Jiang, Zhijun Wang Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing , China Dec 8-10, 2008 Haikou, China

2 Contents Brief introduction of wood and rubberwood preservation
Treatment specification and quality control Laboratory test of Antistain and Antimold Formulations on rebberwood (ITTO ) Laboratory test of Antistain and Antimold Formulations ( ) Technical report of vacuum pressure treatment by NaPCP free preservative during

3 1 Brief introduction of wood and rubberwood (RW) preservation

4 Wood preservation in China
Railway sleeper by creosote Exterior uses treated by CCA/ACQ/CuAz Indoor uses of rubberwood by boron

5 ACQ treated Chinese fir for exterior use, Anhui, 2006

6 RW Preservation in China
Began on 1970’s Today mainly by vacuum/pressure process

7 Sawing of rubberwood

8 The rubberwood treated

9 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

10 2 Treatment specification and quality control

11 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/T (wood for C1: 2.8kg/m3 B2O3)

12 Penetration check

13 Solution for checking boron

14 Drying rubberwood, Red-Present of boron;
Yellow- without boron

15 No spraying Fresh treated rubberwood spraying with reagent solution

16 Retention determination

17 By chemical analysis of boron:Titration,ICP etc
Retention calculation by treating record

18 Treating record for each charge at Lezhong Wood Factory, Hainan

19 3 Laboratory test of Antistain and Antimold Formulations (1996-1998)
3.1 Experimental methods

20 Rubberwood sample size: 50×20×1 mm, maple 40×20×3 mm.
Fungicidal formulations for stain control: F1, F2: chlorothalonil/carbendizam fungicides.

21 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 % upper surface. 4 - Heavy stain: stain or mold covering more than 40% upper surface.

22 3.2 Results

23 Anti-sapstain Treatment Average Std
Table 1. Comparison of the effectiveness of anti-sapstain treatments against Botryodiplodia theobromae Pat. on rubberwood Anti-sapstain Treatment Average Std Untreated Control 4.0 0.0 0.25%NaPCP 0.5%NaPCP 3.0 1%NaPCP 1.0%F1(F)

24 0.20%F2 2.0 0.0 0.40%F2 1.0 0.5%F1(E)+0.10%F2 0.5%F1(E)+0.20%F2 0.5%F1(F)+0.05%F2 0.5%F1(F)+0.10%F2 0.5%F1(F)+0.20%F2

25 Conclusion for 3 The formulations containing % F2, mixed with 0.5%F1 or 0.40%F2 alone are effectiveness for controlling Botryodiplodia theobromae in lab test.

26 4 Laboratory test of Antistain and Antimold Formulations (2003-2007)
4.1 Experimental methods

27 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.

28 4.1.2 Fungicides for the test

29 Table 2: Fungicidal formulations for the stain control test
Common name Formulation types CTL Chlorothalonil Emulsion CBZ Carbendazim 50% wetable power Benomyl BAC Dodecyl dimethyl benzyl ammonium chloride Water solution Cu-8 Copper oxine Acetic acid solution DDAC Didecyl dimethyl ammonium chloride PPZ Propiconazole TEB Tebuconazole

30 4.1.3 Method for stain control

31 4.2 Results

32 Table 3: Result of the stain control test
Formulations Concentrations 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

33 Contd Formulations Concentrations of 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

34 Contd Formulations Concentrations of 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

35 Contd Formulations Concentrations of 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

36 Conclusion for 4 Some formulations containing CBZ, Benomyl, Cu-8 have excellent effectiveness for the controlling of Botryodiplodia theobromae Pat.

37 5 Technical report of vacuum pressure treatment by NaPCP free preservative during 2006-2007

38 5.1 Materials and method 5.1.1 Materials Fresh rubberwood timber.

39 5.1.2 Preservatives Formulations Boric acid Borax F2 Site 1 0.50 1.00 Site 2 0.20

40 5.1.3 Test sites and treating procedure
Vacuum pressure treatment was used in the following procedure.

41 Site 1:Lezhong Wood Factory, Hainan Nongken Wood Co,duration:Aug 3, 2006– May 31, 2007.

42 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

43 Fungicide F2 for stain control made in Jiangsu, China

44 Tank for preparation of treating solution at Lezhong wood plant

45 Control panal

46 Site 2: Cangjiang Wood Plant, Xishuangbanna, Yunnan Province
Site 2: Cangjiang Wood Plant, Xishuangbanna, Yunnan Province. duration:July 24, 2006– Oct 31, 2006.

47 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 10

48 Tank for preparation of treating solution in Cangjiang wood plant, Yunnan

49 RW timber before treatment

50 Air drying after treatment prior to kiln

51 5.2 Results This field demonstration indicated that F2 could prevent the treated timber for days from stain and mold during air drying.

52 Conclusion for 5 Fungicide carbendazim (F2) can be used for stain and mold control instead of NaPCP.

53 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 th 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 Preservative Chlorothalonil, China Wood Industry, 1997,11(4), 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), 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

54 The support and cooperation of Lezhong and Cangjiang wood plant for the field treatment are much appreciated.

55 Thanks for your attention!
wish you have a nice stay during the workshop and visiting tour around the Island.


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