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SIMPOH (Dillenia obovata)
Nom commercial
Simpoh
Nom scientifique (avec auteur)
Dillenia obovata (Blume) Hoogl.
Famille
DILLENIACEAE
Noms communs (pays)
Simpur rimba (Indonesia); Zinbyun (Myanmar); San-tong (Thailand); San-yai (Thailand); Mai-san (Myanmar); Simpoh ayer (Malaysia); Simpoh padang (Malaysia); Sempur batu (Indonesia); Simpur talang (Indonesia); Masan (Thailand)
Synonymes du nom scientifique (avec auteurs)
Dillenia aurea
DESCRIPTION DE L'ARBRE
Description botanique
It is a medium-sized to fairly large deciduous tree up to 35 m tall, with often rather crooked bole. It is branchless for up to 14 m, but usually much less, and up to 70 cm in diameter. The buttresses are absent or small.
Habitat naturel
Dillenia obovata is found in lowland deciduous or evergreen secondary forests, up to 500 m of altitude. In Indochina it is reported up to 1,800 m of altitude.
IDENTIFICATION DU BOIS
Description anatomique du bois
Vessels per mm2 5 to 20. Wood diffuse porous. Vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 100 to 200 micras. Vessel-ray pits reticulate and/or foraminate. Vessel-ray pits similar to intervessel pits in size and shape. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Axial parenchyma scalariform. Larger rays more than 4 seriate. Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Sheath cells. Fibers with distinctly bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The heartwood is red-brown to dark reddish-brown, sometimes with a purplish tinge, and usually not demarcated from the slightly paler sapwood.
Index de Teinte (1 = Noir, 7 = Jaune clair)
4
Grain
The grain is straight or, more usually, interlocked.
Texture
The texture is moderately coarse and even.
Durabilité naturelle
The wood is susceptible to dry-wood termites, blue stain and decay fungi.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
4
Teneur en silice
Silica Content: It contains 0.1% silica.
Résistance à l'imprégnation
It can be readily impregnated with preservative substances.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.53
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.58
Retrait tangentiel total (saturé à 0%TH) (%)
12.0
Retrait radial total (saturé à 0%TH) (%)
3.0
Défauts dus au séchage
Ease of Drying: Air seasoning is reported to be good. Drying Defects: Slight bowing and staining are reported. Kiln Schedules: Schedule recommended for Litsea.
Calendrier de séchage en séchoir recommandé
UK-C
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
4.0
Calendrier de séchage en séchoir
http://www.tropicaltimber.info/wp-content/uploads/2015/08/KD_British_ENG.pdf
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
1103
OUVRABILITÉ
Sciage
Sawdust can block the blades.
Coupe de placage de déroulage
It possible to produce decorative sliced veneer.
Placage tranche
It possible to produce decorative sliced veneer.
Usinage
This species is easy to machine.
Rabotage
Planing is reported to be easy.
Perçage
Boring operations are rated as easy to fair.
Clouage
It needs pre-bore for nails, but it screws well. The nail holding properties are poor.
Collage
It has a good behavior in gluing.
Finissage
Finishing of this wood is rated as fair.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
HOUSING GENERAL
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
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