Ag-Network-Chile

AGRICULTURAL OFFICE

Embassy of Chile, Washington, D.C.


Eucalypt Globulus

EUCALYPTUS GLOBULUS (Labill ssp. globulus)
"TASMANIAN BLUE GUM"

The species Eucalyptus globulus belongs to the Class Angiospermes, Sub-class Dicotyledons and to the Myrtle (Mirtacae) Family. Under normal conditions, it can grow to a height of 45 to 60 meters. Normally, the trees are straight and well-formed, showing a clean stem up to about two thirds of their total height.

The tree is native to Australia , occurring naturally in South East Tasmania, the Bass Straight Islands , and along the southern coast of the State of Victoria , Annual rainfall in these regions averages between 500 and 1400 millimeters. In summer, the temperature reaches a maximum of 19° Centigrade in winter, a minimum of 3.61° Centigrade.

Due to its rapid growth and availability, it is cultivated in large plantations in Portugal , Spain , South Africa and most Latin American countries.

In Chile , it can be found throughout the Central and Southern regions. Currently, forests cover approximately 170,000 hectares.

The wood is mainly used to manufacture pulp and paper, but also to produce indoor and outdoor paneling, flooring, furniture, boards, veneers, posts and fuel wood.

Most of Chile 's Eucalyptus plantations (90%) are of Eucalyptus globulus Labill., an Australian species that grows quite well in some parts of the country. While the best plantations are located near the coastal city of Concepcion, in the VI ll t h Region, situated in the nation's mid-southern section, where it is not unusual to find 20-year-old Eucalyptuses that are 60 meters high and 50 centimeters in diameter, they thrive from Copiapo in the II Ird Region down to the island of Chiloe, in the X t h Region. Between these two points, soils and climates vary widely, which demonstrates this species' extraordinary adaptability. This factor, together with the tree's high growth rate and strong market demand, assures it a promising future for development in the country.

Chile'sEucalyptusplantationsmainlyprovidewoodforpulpproductionandforfuel. Increasingly, the wood is also being used to manufacture parquet flooring, veneers, moldings, furniture, and in general, high added-value products.

Eucalyptus wood has a soft yellowish-brown color and pronounced growth rings. From the tree's leaves, essential oils are extracted that are mainly exported.

Currently, Chile has more than 390,000 hectares of Eucalyptus plantations.

 

 

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.

  • Tangential

11.7%

  • Radial

6.5%

  • Volumetric

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

ST, ECF

T.C.F.

BEATING

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

PHYSICAL CHARACTERISTICS

 

 

 

 

 

 

 

 

 

 

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

Return to Top of the Page

Site Map | Embassy of Chile | ©2005 Ag-Network-Chile