Materials Information - Wood, Metal, Plastic
WOOD
1. Thermo Treated Ash (Fraxinus)
Thermo treated (or heat treated) wood is a solution which is beautiful, durable, functional and environmentally sound. It is free of chemicals, harmless to utilize and does not originate from endangered rainforests..jpg)
Thermo treatment is a computer-controlled process of heating wood in a special kiln at a temperature of 212 °C. In this process no chemicals are used. The heat treatment changes the cell structure of the wood - moisture, bacteria, and acids are driven out; wood lacking these is not conducive to the growth of fungus, rot and mildew, and it resists environmental effects significantly better than untreated wood.
After test according to EN15083-1 for determination of the natural durability of solid wood against wood-destroying fungi, the tested thermo treated ash reaches the durability class 1.
Oiling will improve the stability of the material and its resistance to the changing weather conditions.
For photos and additional information on oiled and un-oiled wood - please click here.
Please see for more information :
http://www.thermory.com/thermotreatment/
http://www.storaenso.com/
2. Siberian Larch (Larix)
Siberian larch is durable due to its density and resin content, which makes it strong and extremely resistant to rot. Foundation structures of buildings in Venice made of larch wood serve as the best proof to this fact. This is a high-grade, ecologically sound material.Due to its moisture resistance, hardness and decorative look larch is widely used both indoors and outdoors. The content of resin makes a perfect alternative to impregnated wood for outdoor use. Over time its resilience and density will only grow.
We use glued laminated (glulam) larch. The process improves technical qualities of the wood - glulam warps and cracks remarkably less than plain wood. Glulam consists of wooden boards that are glued together along finger joints to form beams. After they have been dried to a mean moisture content of 10%, the beams are assembled to glulam with approved adhesives.
Please see for more information :
Siberian larch: http://www.siberianlarchtimber.com/Siberian-Larch.php
Glued laminated wood: http://en.wikipedia.org/wiki/Glued_laminated_timber
SURFACE TREATMENT FOR WOOD
1. Oiling
On our benches, we apply two coats of transparent, satin-matt OSMO wood stain and protector on raw wood.
For Osmo Natural Oil Woodstain, please click to see the Product Information and Safety Data Sheet.
For more information on OSMO wood stain and protector, please see:
http://www.osmo.de/opencms/en/index.html
Natural oil wood stain is the base and top coat in one. It is very water-repellent, weatherproof and UV-resistant. The breathable surface contains active ingredients to protect the wood against mildew, algae and fungal attack. The micro-porous finishes allow wood to breathe. The oil does not flake or peel.
2. Ferrous Sulphate and Copper Sulphate
Timber surface treatment with ferrous or copper sulphate prevents the attack from fungus and insects. It stains the timber permanently. The colour will intensify in time due to the impact of UV-light. If no further darkening of the colour is desired, the timber could be oiled with transparent natural oil.METAL
1. Carbon Steel and Stainless Steel
Stainless steel, also known as inox steel differs from carbon steel by the amount of chromium present. Carbon steel rusts when exposed to air and moisture. This iron oxide film (the rust) is active and accelerates corrosion by forming more iron oxide.Stainless steels contain sufficient chromium to form a passive film of chromium oxide, which prevents further surface corrosion and blocks the corrosion from spreading into the metal's internal structure.
SURFACE TREATMENT FOR METAL
1. Galvanizing
Galvanizing is an anti-corrosion treatment in which the products are covered with a thin layer of zinc. Without any damage the surface will last for many years, keeping the details from rusting. When exposed to the atmosphere, zinc reacts with oxygen to form zinc oxide, which further reacts with water molecules in the air to form zinc hydroxide. Finally zinc hydroxide reacts with carbon dioxide in the atmosphere to yield a thin, impermeable, tenacious and quite insoluble dull gray layer of zinc carbonate which adheres extremely well to the underlying zinc, so protecting it from further corrosion.2. Powder painting
On our products the zinc protection is combined with the use of powder painting. The powdered paint is electrostatically charged and sprayed onto the part. The part is then placed in an oven and the powder particles melt and coalesce form a continuous film. The combination of a polyester powder coatings top coat and the galvanized surface provides a good aesthetic finish, excellent mechanical properties and outstanding corrosion resistance. The paint will again, on the one hand, protect the zinc surface from outside damage, and on the other hand, gives the products their final great visual appearance.The final coating is continuous and will vary from high gloss to flat matt depending on the design of the powder by the supplier.
3. Anti-graffiti lacquer
To keep powder coated items looking new and attractive and to reduce overall maintenance costs, an additional protection can be applied on their surface.The application of anti-graffiti lacquer is done the same way as regular powder painting. Anti-graffiti lacquer is based on polyurethane chemistry which releases a blocking agent during the curing process.
This solution is designed to allow the simple and rapid removal of most forms of graffiti and is recommended for use where resistance to graffiti is required. Typical end uses include train, tram and bus components, bus shelters, telephone boxes, school furniture and play equipment, outdoor park and street furniture, garden furniture, road signs, fencing and public buildings.
Cleaning instruction of products covered with Anti- graffiti lacquer
| Type | Cleaning Fluid |
| Enamel Spray | A, C, D |
| Water-based marker | O |
| Permanent marker | A, B, C, D, E |
| Lipstick | O |
| Shoe polish | O |
KEY
A 90% denatured alcohol
B 1:1 mixture of denatured alcohol and detergent
C Acetone
D Trichloroethylene
E Tetrachloroethane
O Rub with cloth
ROTATIONAL MOLDED PLASTIC
In our products which are made of rotational moulded plastic, most commonly Polyethylene or PE is used. This gives many good characteristics to the products, such as resistance to weather conditions, UV light, shock and deformations, most acids, most chemicals and corrosion.The principle of rotational moulding of plastics is simple.
The basic steps of (1) mould charging, (2) mould heating, (3) mould cooling, and (4) part ejection are shown in figure below
Rotational moulding
1. The mould is charged with plastic in powder form, then closed and placed in an oven.
2. The mould is heated and rotated about two principal axes so that the powder adheres to, and forms a monolithic layer against, the mould surface.
3. The rotation continues during the cooling phase so that the plastic retains its desired shape as it solidifies.
4. When the plastic is sufficiently rigid, the rotation is stopped and the plastic product removed from the mould.
We are very much aware of the environment and with ease can emphasise the environmental sustainability of this technology. Minimum waste is created in the production process and all waste materials and products can be recycled.