THERMOWOOD METHOD 탄화목 제조공정

THERMOWOOD METHOD

열처리목재의 제조공정을 간단히 설명하였다.

Thermowood thermal method has been patented for the members of the International Thermowood Association. The process can be divided into three phases:

1. Temperature increase and high temperature drying:

Wood temperature is raised rapidly using heat and steam to a level of around 100 °C. Thereafter the temperature is increased steadily to 130 °C and moisture content reduces to nearly zero.

2. Heat Threatment:

Whenever high heat drying is occured the temperature is increased to a level of 185-215 °C. When the target level has been reached, the temperature remains constant 2-3 hours.

3. Cooling and Conditioning:

In the final stage, the temperature is reduced to 50°C-60 °C by using water spraying system, this process is continued to when the moisture content is reached to 4% -6%.

When the temperature is raised or lowered, a special adjustment system is used in order to prevent surface and inside splitting and checking. Customised adjustment values are used for different wood species and dimensions.(thickness,width)

The raw material can be green or kiln-dried wood. If the process is begun with green wood, the wood can be dried in a very fast high-temperature drying process. The method is suitable for every kind of wood species.

Diagram of the Production Process

2-THERMOWOOD TREATMENT CLASSES

Thermowood has two Standard treatment classes; Thermo S and Thermo D,

Thermo-S (Stabilite 180°C)

The letter 'S' in 'Thermo-S' stands for 'stability'. Along with appearance, stability is a key property in the end use applications of the products in this treatment class. The average tangential swelling and shrinkage due to moisture for Thermo-S class treated wood is 6-8%. Thermo-S class ThermoWood is classified as relatively durable according to the standard EN 113. its natural resistance to decay meets ‘class 3’ requirements both in Hardwoods and Softwoods.

Recommended end use applications for Thermo-S class heat-treated timber

Thermo-S Soft Wood Thermo-S Hard Wood:

- Building Components

- Furnishing in dry conditions

- furniture

- garden furniture

- sauna benches

- door and window components

- Cladding

- Furnishing

- Furniture

- Flooring

- Sauna structures

- Garden furniture

Thermo-D (Durability 212°C)

The letter 'D' in 'Thermo-D' stands for 'durability'. Along with appearance, biological durability is a key property in the end use applications of products in this treatment class. Thermo-D class, ThermoWood is classified as durable according to the EN 113 standard. It’s natural resistance to decays meets “class 1” requirements for Hardwood species and “class 2” for softwood species.

Recommended end use applications for Thermo-D class heat-treated timber:

Thermo-D Soft Wood: Thermo-D Hard Wood:

- Cladding

- Decking

- Outer and interior doors

- Shutters,Windows

- Sauna and bathroom furnishing

- Garden furniture.

- Cladding

- Decking for outdoor use

- Garden furniture

- Flooring (parquet)