What is Preserved Wood Used for Wood Playground
Created on 08.21
In the production of wooden outdoor playgrounds, the selection of wood will affect the service life, safety and overall quality of the outdoor slide. Preservative wood is a specially formulated wood used for outdoor children’s playground equipment. It is specially treated to provide resistance to microbial attack, moisture damage and insect attack from the environment. It also needs to be able to withstand frequent, long-term contact with children, while maintaining structural strength. Therefore, preservative wood is widely used in the playground equipment industry around the world.
1. Types and advantages.
1.1 Russian Scots Pine.
At present, the preservative woods most commonly used in outdoor playground equipment are Russian Scots Pine and Nordic Finnish Wood. These two types of wood is the best choice for preservative treatment because of their special natural texture and growing environment. Russian Scots Pine grows in the cold region of Siberia, with long growth period and moderate density. The grain of Russian Scots Pine is clear and uniform. There is certain amount of resin in the wood, which gives it a good basis for preservative treatment. The light color of Russian Scots Pine does not change after preservative treatment, which is perfectly matched with the color scheme of play equipment.
1.2 Nordic Finnish Wood.
Nordic Finnish wood comes from the temperate forest of Northern Europe. It is mainly Scots pine. The local environment where Finnish wood grows is extremely harsh. The wood has a dense structure and very high natural durability. The fibers of Finnish wood are densely packed together. The moisture content of the wood is very low, and the wood structure is very stable. After preservative impregnation, Finnish wood can absorb more preservatives and has less tendency to deform. This makes Finnish wood suitable for use in areas that are key load-bearing areas of amusement facilities exposed to the environment for a long time to sunlight and rain, such as the climbing frame and the floor of the platform.
2. Preservative treatment process.
2.1 Carbonization.
The greatest value of Treated Wood lies in its special preservative treatment process. The main stream preservative treatment process for wood is carbonization and ACQ impregnation process. These two processes use different principles to protect the wood. Carbonization is a physical process of preservative treatment. The wood is placed in a high temperature and high pressure oxygen-free environment and then pyrolyzed. By controlling the temperature and time, the wood's organic components such as hemicellulose and lignin will be moderately broken down. In addition to removing the moisture and nutrients from the wood, the survival of microorganisms are also removed. The molecular structure of the wood is changed, and the wood's water absorption is greatly reduced. This treatment process can significantly inhibit the wood's expansion and contraction and improve its dimensional stability. Carbonized wood will form a carbonized layer on the surface of the wood, which is dark brown and feels soft to the touch. It also has certain antiseptic effects. At the same time, it does not affect the breathing property of the wood.
2.2 ACQ Preservative.
Preservative treatment with ACQ is a chemical protection method. Its specific method is to put the wood into the pressure impregnation tank, and inject the ACQ preservative into the wood cell evenly by vacuum pressure. ACQ, also known as alkyl copper quaternary ammonium compound, is an internationally advanced mainstream preservative, widely used for children's and commercial outdoor wood playground. Its main components are copper ions and quaternary ammonium salts, which are totally free of toxic heavy metals such as chromium and arsenic, and basically solve the environmental pollution and health problems caused by traditional preservatives. Its simple and environmentally friendly characteristics create an antibacterial space for the wood for a long time, blocking the attack route of fungi and insects, and the safety of children who contact playground equipment. The service life of playground equipment with ACQ protection can be extended 3-5 times compared with ordinary wood on the outdoor environment, and the protection effect is long-lasting and stable.
3. Value.
The value of using Preserved Wood for playground equipment is not only because it can be used for a long time, but also because it can ensure the safe use of outdoor playground equipment. The surface of the wood which has been strictly anti-corrosion treatment is smooth and burr-free, which can reduce the risk of wood splinters scratching children when they play; at the same time, its stable structure can also reduce the safety accident of children playground equipment caused by wood deformation and cracking.
4. Safety standards
In areas such as Europe and the United States where the requirements for the safety of playground equipment are strict, the selection of Pressure-Treated Wood must also meet local industry standards. For example, the EU standard EN 599 specifies the requirements for the performance of wood preservatives, and the EN 351-1 standard specifies the requirements for some important indicators of treated wood such as penetration degree and agent remaining amount of wood. Because ACQ preservative has good environmental performance, it has become the first choice of wood treatment for child's playground equipment in many countries, that is, the material will not cause environmental pollution and harm to the users throughout the life of the product.
5. Summary
As can be seen from the above, due to the increasingly strict requirements for safety and environment of outdoor playground equipment all over the world, the quality control system of preservative wood is also improving constantly. From the selection of wood substrate to the parameter control of preservative treatment process, and then to the quality inspection of finished products, each link will affect the performance of final products. For international orders, if you know the performance characteristics of the material used in the production of preservative wood for kid playground equipment and the protection principle, especially the environmental advantages of key technologies such as ACQ preservative, not only can it help you make wise purchases, but also it can give you reliable guarantees for the long-term safe operation of outdoor playground equipment.
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