PHYSICAL PROPERTIES
PROPERTY |
DESCRIPTION |
Color |
Clear yellowish-brown |
Ring Growth |
Pronounced. |
Texture |
Open and interwoven grain |
Nominal Density |
720 Kg/m³ |
Shrinkage |
From green state to 0% moisture content. |
|
11.7% |
|
6.5% |
|
18.2% |
Natural Durability |
Category 4, not very durable, i.e., the wood's useful life is greater than 5 years but less than 10. |
Permeability |
Sapwood and heartwood, hard to treat. Retention < 120 Kg/m³. |
Source: CONAF – INN
GENERAL CHARACTERISTICS OF EUCALYPTUS PULP
(Wood Source: Eucalyptus Plantations)
FIBRE
CHARACTERISTICS |
VALUE |
Average Length |
0.8 mm |
Average Width |
15.0 µm |
Average Wall Thickness |
3.0 µm |
Fibers per Gram of Pulp |
18.0 millions |
Weight of Each Fiber |
6.5 mg/100 m |
UNBEATEN PULP
ISO Brightness: ST and ECF: 89 +, TCF: 87 + |
|
Dirt Count |
<1.0 mm²/Kg |
Viscosity |
>15.0 cp |
CHARACTERISTICS OF THE PULP
CHARACTERISTICS |
TYPE OF PULP |
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ST, ECF |
T.C.F. |
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BEATING |
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|
|
Revolutions (rpm) |
0 |
1,800 |
3,600 |
5,300 |
8,500 |
0 |
1,200 |
2,300 |
3,400 |
5,400 |
Drainability (ºSR) |
16 |
20 |
25 |
30 |
40 |
19 |
20 |
25 |
30 |
39 |
Energy |
|
|
|
|
|
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|
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|
|
PHYSICAL CHARACTERISTICS |
|
|
|
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|
|
|
Tear Index (mNm²/g) |
2.7 |
8.4 |
9.2 |
9.5 |
9.7 |
3.8 |
7.9 |
9.7 |
9.4 |
9.1 |
Tensile Index (Nmg) |
17.1 |
45.2 |
57.9 |
64.4 |
696 |
23.5 |
50.6 |
63.1 |
67.5 |
68.7 |
Burst Index (KPam²/g) |
0.6 |
2.4 |
3.3 |
3.8 |
4.2 |
1.3 |
3.0 |
4.1 |
4.3 |
4.6 |
Stiffness (KNm/g) |
4.0 |
6.5 |
7.2 |
7.5 |
7.6 |
4.6 |
6.4 |
7.2 |
7.6 |
7.8 |
HANDSHEET CAPACITIES |
|
|
|
|
|
|
|
|
|
|
Specific Volume (cm³/g) |
2.07 |
1.75 |
1.62 |
1.53 |
1.47 |
2.03 |
1.71 |
1.61 |
1.54 |
1.5 |
Porosity Gurley (S/100cc) |
0.7 |
1.8 |
3.5 |
6.8 |
163.7 |
0.7 |
1.5 |
3.2 |
6.7 |
14.0 |
Light Scattering (m²/Kg) |
42.5 |
35.0 |
31.8 |
29.8 |
28.0 |
36.5 |
32.2 |
30.1 |
29.0 |
26.6 |
Opacity % |
81.0 |
77.2 |
75.1 |
73.6 |
72.1 |
77.4 |
74.6 |
73.3 |
72.2 |
70.1 |
Source: CORMA
MECHANICAL PROPERTIES
PROPERTY |
MAXIMUM STRESS (Moisture: 12%) |
Static Bending |
|
Stress at Proportional Limit |
76.0 MPa |
Modulus of Rupture |
117.5 MPa |
Modulus of Elasticity |
14,234 MPa |
Compression, Parallel |
|
Stress at Proportional Limit |
56.4 MPa |
Maximum Crushing Strength |
68.5 MPa |
Modulus of Elasticity |
15,124 MPa |
Compression, Perpendicular |
|
Stress at Proportional Limit |
11.8 MPa |
Tension, Perpendicular |
|
Tangential (Rupture) |
6.9 MPa |
Radial (Rupture) |
6.9 MPa |
Hardness |
|
Perpendicular (Maximum Load) |
6.865 N |
Parallel (Maximum Load) |
7.306 N |
Shear |
|
Tangential (Rupture) |
12.7 MPa |
Radial (Rupture) |
12.7 MPa |
Source: INFOR – CORFO
The content of this document (Chile, A Forestry Nation) was kindly provided by CORMA, Corporación Chilena de la Madera-
E-mail: corma@corma.cl
-
Web: www.corma.cl


