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ILOMBA (Pycnanthus angolensis)
Nom commercial
Ilomba
Nom scientifique (avec auteur)
Pycnanthus angolensis Warb.
Famille
MYRISTICACEAE
Noms communs (pays)
Kpoyei (Sierra Leone); Ilomba (Zaire); White cedar; Whismore; Walfle; Walehe; Tshimbbuku; Tshilombe; Tika; Tidea; Tian; Teng; Ten; Teke; Pitchong; Oti; Ote; Ongano; Omachan; Nigerian boxwood; Ngosame; Ngitsa; Netere; N`laomba; N`kombo; Muno; Munaba; Mukagato; Moulomba; Lunaba; Llombo; Lamba; Kuurul; Kpoyei; Komo; Etsu; Etsiw; Etsi; Etienh; Etan; Etama; Escamba; Entro; Edna; Diehn; Denke; Dean; Cardboard; Boxboard; Bosambe; Bokongo; Bassa; Bakondo; Atenli; Antenli; Anakue; African nutmeg; Adre; Pycnanthus (United Kingdom); Lifondo (Zaire); Lolako (Zaire); Ilomba (Angola); Ilomba (Congo); Eteng (Gabon); Eteng (Cameroon); Calabo (Equatorial Guinea); Akomu (Nigeria); Otie (Ghana); Walele (Côte d`Ivoire); Oualele (Côte d`Ivoire); Gboyei (Liberia); Gboyei (Sierra Leone)
Synonymes du nom scientifique (avec auteurs)
Pycnanthus microcephalus (Benth. & Hook. f.) Warb.; Pycnanthus microcephalus (Benth. & Hook.) Warb.; Pycnanthus mechowi Warb.; Pycnanthus kombo (Baill.) Warb.; Pycnanthus kombo var. angolensis De Wildeman P. P.; Myristica microcephala Benth. & Hook. f.; Myristica kombo Baill.; Myristica angolensis Welw.
DESCRIPTION DE L'ARBRE
Description botanique
The tree reaches a height of 43 m. The bole is cylindrical, straight and clear to 20 m in length, sometimes with a swollen base or root swellings. The trunk diameter attains 70 to 100 cm.
Habitat naturel
Pycnanthus angolensis is reported in rain forests, transitional, and secondary formations.
Répartition naturelle
West Africa.
Existence de plantations?
It is a long rotation species for plantation. The duration of the rotation is 30 years to reach 50 cm diameter, or 45 years to reach 60 cm in diameter.
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. Scalariform perfora Paratracheal axial parenchyma scanty and/or vasicentric. 4 to 10 rays per mm (medium). Rays non-storied. Rays 1 to 4 seriate. Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Non-septate fibers. Fibers with simple to minutely bordered pits.
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The heartwood is greyish white to pale pinkish beige, it is not demarcated. The silver figure is medium.
Index de Teinte (1 = Noir, 7 = Jaune clair)
5
Grain
Straight; grain has no particular influence on drying, machining and finishing qualities.
Texture
Texture is usually medium to coarse.
Luster
Timber of this species is moderate in 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. The heartwood is sensible to Lyctus attacks.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
5
Tensions internes de croissance
Residual growth stresses are absent.
Teneur en silice
Silica Content: Negligible contents of silica are found in timber of this species. Amounts over 0.05% may affect the wood processing. Silica Value: 0.01
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)
0.45
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.49
Retrait tangentiel total (saturé à 0%TH) (%)
8.6
Retrait radial total (saturé à 0%TH) (%)
4.6
Défauts dus au séchage
Ease of Drying: Drying is moderately difficult to difficult; special care is systematically needed. Drying Defects: Risks of distortions.
Calendrier de séchage en séchoir recommandé
FR-9
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)
646
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
103275
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
389
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
44
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
64
Dureté Janka (latérale) 12%TH (kgf)
289
Dureté Janka (extrémités) 12%TH (kgf)
389
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
Easy; no particular problems.
Perçage
Easy; no particular problems.
Mortaisage
Easy; no particular problems.
Clouage
No particular problem.
Collage
Glues well if basic gluing technical rules are followed.
Ponçage
Difficult to obtain very good results because of interlocked grain.
Polissage
Needs pre-coating.
Compatibilité avec outils manuels
No particular problems.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
EXTERIOR GENERAL, stakes posts, HOUSING GENERAL, boards, frames, steps, panelling, fittings, FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, faces, cores, PACKING, heavy packing, pallets, OTHER AND MUSICAL INSTRUMENTS, pencil, door core, coffin, moldings
EXTERIOR GENERAL
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Piquets
- 5 - Propriedades fisicas e mecanicas da madeira e do contraplacado de Pinus elliottii
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
Planches
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Cadres
- 16 - Woods of the World
Marches
- 17 - Tree Conservation Database
Panneaux
- 18 - W3TROPICOS Missouri Botanical Garden
Accessoires en bois
- 19 - Silica in Timbers
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
Faces (de placage)
- 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
âmes (de placage)
- 27 - Embassy of Brazil in Japan
EMBALLAGE
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Embal_lourd
- 47 - Arvores Brasileiras
Emballage, palettes
- 48 - The strength properties of timbers
Crayon
- 67 - Maderas latinoamericanas. VIII, Calophyllum brasilense, Couratari panamensis, Dendropanax arboreum y Bombacopsis sessilis
âme_porte
- 76 - Descripción General y Anatómica de 105 Maderas del Grupo Andino.
Cercueils
- 78 - Amazonian Timbers for the International Market
Moulures
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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