| | latex of Dyera spp
LATEX FROM JELUTUNG WOOD FROM INDONESIA, WE PRODUCE IN ONE TON/ MONTH, WE want contract to any buyer that want to order with our company, please send any detail offer from u company to our mail in hery_ gunawan18@ yahoo.com
price in usd 9/ kg ( negotiation)
JELUTONG
DESCRIPTION AND USES
Jelutong is the coagulated gutta-like material obtained from the latex of wild trees of Dyera species which are indigenous to certain parts of Southeast Asia.
Before Hevea plantations were developed in Southeast Asia, jelutong was produced and exported for the manufacture of inferior rubber items, in which elasticity was not a prime consideration. With the advent of large-scale rubber production, exploitation of jelutong ceased almost completely. In the 1920s it regained importance as a basic ingredient in chewing gum, sometimes in admixture with chicle, and since then ( at least into the 1960s, when WILLIAMS ( 1963) reviewed it) this has been its main use. It has a consistency comparable to that of chicle, but the additional advantage that its properties also make it suitable for " bubble" gums.
JELUTUNG
Dyera costulata
Jelutong
Family: Apocynaceae
Other Common Names: Jelutong bukit ( Sarawak) .
Distribution: Malaysia and Brunei.
The Tree: May reach a height of 200 ft, with straight and cylindrical boles free from buttresses to lengths of 90 ft; trunk diameters up to 8 ft.
The Wood:
General Characteristics: Heartwood creamy white to pale straw not differentiated from sapwood. Grain mostly straight; texture moderately fine and even; slightly lustrous without taste but has a slight sour odor that is distinctive. Marked with latex traces or canals often in clusters 2 to 3 ft apart along the stem.
Weight: Basic specific gravity ( ovendry weight/ green volume) 0.36; air-dry density 28 pcf.
Mechanical Properties: ( 2-in. standard)
Moisture content Bending strength Modulus of elasticity Maximum crushing strength
( % ) ( Psi) ( 1, 000 psi) ( Psi)
Green ( 37) 5, 570 1, 155 3, 050
16% 7, 315 1, 180 3, 920
Janka side hardness 330 lb for green material and 390 lb for dry.
Drying and Shrinkage: Dries easily with little or no degrade. Kiln schedule T10-4DS is suggested for 4/ 4 stock and T8-D3S for 8/ 4. Shrinkage green to ovendry: radial 2.3% ; tangential 5.5% ; volumetric 6.2% . Movement in service is rated small.
Working Properties: Works easily with hand and machine tools but may gum the cutter excellent for carving; glues satisfactorily.
Durability: Nondurable, prone to sap stain, and is readily attacked by termites and powder-post beetles.
Preservation: Reported to absorb preservatives readily and is easily treated using the open tank system.
Uses: Patternmaking, drawing boards, carvings, wooden shoes, picture frames, pencil slats. The tree yields a latex used in the manufacture of chewing gum. | | |
|
)
