Eucalyptus is a kind of hardwood (wiki information http://en.wikipedia.org/wiki/Eucalyptus ) widely planted in Vietnam and Guangxi Province of China. This kind of core veneers are suitable for the production of hardwood plywood and film faced plywood. Its quality is premium compared with poplar softwood plywood. Eucalyptus plantations are being raised over an area of 8 million ha in the world. It grows well in poor soil and is fast growing in humid enviroment. After seven years, some species can reach 35 meters in height.
Eucalyptus logs were steamed at 60-70°C for 20 hours before rotary cutting. The thickness of the veneers is about 2.6 mm. Veneers were dried to the moisture content of 4 to 6% by an veneer drier. Plywood is manufactured where urea formaldehyde (UF) resin was applied to the veneer layers by a glue spreader with a rate of 300 g/m2.
Eucalyptus Plywood from China
In mainland China, Eucalyptus plywood is not a specific kind plywood because it means the core of the plywood. The face and back of the plywood can be malaysia redwood okoume, bintangor, meranti (Red Canarium) and premium-looking hardwood. Besides commercial plywood and furniture plywood, eucalyptus is also used in the manufacturing of film faced plywood. Hardwood plywood made from hardwood veneers are expensive for some clients who will choose combi core (combination of poplar and eucalyptus).
According to film faced plywood manufacturers, the hardwood plywood usually need the face and back veneers in poplar wood rather than eucalyptus. Because poplar is much easier for the laminatition of phenolic film or hardwood veneers.
How to tell eucalyptus ply (A) from poplar ply (B)?
- Appearance: A edge cutting looks darker compared with B.
- Weight: A density is about 600 kgs/m3 and Bplywood is only 530 kgs/m3 around.
- Strength: A is much stronger than B.
- Price: A price is 20% higher than B.