KAPOKIER (Bombax buonopozense)
Nom commercial
Kapokier
Nom scientifique (avec auteur)
Bombax buonopozense Beauv.
Famille
BOMBACACEAE
Noms communs (pays)
Kapokier (Senegal); Kapokier (Côte d`Ivoire); Bumbum (Burkina Faso); West African Bombax (United Kingdom); Ougoumalanga (Gabon); Esodoum (Cameroon)
Synonymes du nom scientifique (avec auteurs)
Bombax flammeum Ulbr.; Bombax buesgenii Ulbr.; Bombax angulicarpum Ulbr.
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 35 m, with a straight and cylindrical bole. The trunk is slightly buttressed, it attains 130 cm in diameter.
Habitat naturel
Bombax buonopozense is reported in transitional and dense rain forests.
Répartition naturelle
From Sierra Leone to Congo.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 200 micras or more (large). Tyloses thin walled. Non-vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits sim Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Axial parenchyma storied. Prismatic crystals in non-chambered axial parenchyma cells. 3 to 4 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays non-storied. Larger rays more than 4 seriate. Occasionally prismatic crystals in the ray cells. Heterogeneous rays and/or multiseriate heterogeneous rays. Non-septate fibers. Fibers with simple to minutely bordered pits.
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Vue macroscopique du bois (plan radiale)
-
Vue microscopique d'une section transversale du bois
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The heartwood is whitish to pinkish grey, it is not demarcated. The silver figure is medium to large.
Index de Teinte (1 = Noir, 7 = Jaune clair)
7
Grain
Straight; grain has no particular influence on drying, machining and finishing qualities.
Texture
The wood is reported to have a coarse texture.
Luster
This species has moderate to high luster.
Durabilité naturelle
Not durable; important risks of decay attacks at any processing step, from logs up to final products. It must receive preservative treatment. Sensible to termites attack. Heartwood is sensible to Lyctus attacks.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
5
Résistance à l'imprégnation
Easy to treat with a full penetration of the preservative products using vacuum-pressure method.
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.41
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.44
Retrait tangentiel total (saturé à 0%TH) (%)
5.6
Retrait radial total (saturé à 0%TH) (%)
3.0
Défauts dus au séchage
Ease of Drying: The rates of shrinkage are small to moderate, from green to 12% moisture content 2.2-2.5% radial and 3.8-4.0% tangential. Drying Defects: The wood is reported has little or no degrade, altough precautions must be taken to prevent blue stain. Kiln Schedules: The recommended temperatures for kiln drying 25 mm thick boards from green to 15% moisture content are dry bulb 80-90oC and wet bulb 55-65oC.
Calendrier de séchage en séchoir recommandé
FR-2
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
1.9
Calendrier de séchage en séchoir
http://www.tropicaltimber.info/wp-content/uploads/2015/09/KD_French.pdf
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
662
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
49931
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
275
OUVRABILITÉ
Sciage
It is easy to saw.
Coupe de placage de déroulage
Suitable for peeling without treatment.
Placage tranche
Suitable for peeling without treatment.
Effet d'émoussement
Slight blunting effect; ordinary tools can be used for sawing and machining.
Usinage
Machining of this species is reportedly easy.
Rabotage
Easy; no particular problems.
Moulurage
Rather difficult; special tools are needed.
Perçage
Rather difficult; special tools are needed.
Mortaisage
Rather difficult; special tools are needed.
Clouage
Easy to perform but low nails holding.
Collage
Glues well if basic gluing technical rules are followed.
Ponçage
Particular care is needed to avoid woolly aspect of the surface.
Polissage
Needs pre-coating.
Compatibilité avec outils manuels
No particular problems.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, cores, PACKING, light packing, OTHER AND MUSICAL INSTRUMENTS, door core, moldings, scale model
MEUBLES ET M. DE RANGEMENT
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Meubles ordinaire
- 23 - Handbook of Hardwoods
PANNEAUX ET PLACAGE
- 25 - Directory of Timber Trade Malaysia
âmes (de placage)
- 27 - Embassy of Brazil in Japan
EMBALLAGE
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Embal_léger
- 46 - ECUADOR, Inventario y Aprovechamiento de los Bosques del Sur Ecuatoriano
âme_porte
- 76 - Descripción General y Anatómica de 105 Maderas del Grupo Andino.
Moulures
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
Maquettes
- 83 - Algunas caracteristicas fisicomecanicas de la madera de tres especies de la cordillera NeoVolcanica
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