What is preservative wood? Generally refers to artificial wood preservatives. Artificial wood preservatives are made by adding chemical preservatives (such as CCA-C preservatives) to ordinary wood to protect them from corrosion, moisture, fungi, insects, mildew and water. It can directly contact the soil and humid environment, and is often used in outdoor flooring, engineering, landscape, wood preservatives and so on. Uses: outdoor flooring, garden landscape, flower stand, wooden swing, entertainment facilities, wooden plank road, interior decoration such as floor and furniture. Principle: The preservative is immersed in a vacuum tank to pressurize the preservative into each part of the wood fiber, so that the wood has excellent anti-corrosion and insect-proof properties. Advantages: natural, environmentally friendly, safe, anti-corrosive, anti-mold, anti-mite, anti-termite attack, easy to paint and color Disadvantages: preservatives must be added to make anti-corrosion wood, slight chemical odor, uneven color, and large matte. At present, wood preservative treatment is divided into two types, one is a treatment method with a high pressure impregnation tank; the other is a treatment method for a pressureless impregnation tank. The high-pressure impregnation tank treatment method is the most important and most effective industrial production method for wood preservation. The full cell method (besser method, vacuum/pressure method) is adopted, and the process flow is vacuum→immersion→pressurization→discharge→vacuum . The most commonly used method to prevent wood decay is to be chemically preserved. A considerable amount of water-soluble preservatives are currently used, accounting for about 3/4 of the total amount of preservative used. The water-soluble preservatives mainly include: copper chromium arsenic (CCA), copper chromium boron (CCB), fluorochrome arsenic (FCAP), ammonia-soluble copper arsenate (ACA), and acid copper chromate (ACC). These agents have been widely used, and the amount of CCA used is quite large, accounting for about 60% of the amount of water-soluble preservative used. What is the magic of CCA-C preservatives? CCA-C preservative has strong sterilizing, insect-proof and termite-proof, anti-marine drilling ability, its active ingredients can be firmly fixed in wood, not lost by soil moisture, rainwater, seawater, lasting It has good properties and is widely used in the anti-corrosion treatment of outdoor building wood structural materials. It can also be used for anti-corrosion pit wood, pile wood, sleepers, electric poles, cooling tower wooden frames, etc. The wood treated by CCA-C is odorless, can be painted and glued, has little effect on the strength properties of wood, and has certain flame retardancy. At this point, I think everyone has a question, is the wood preservative safe? Wood preservative is safe! But you can't drink it directly into the body. Most preservatives used in preservative wood are water-borne, and the active ingredients are metals and organic salts/azoles. They do not produce toxic gases such as formaldehyde and phenol. In addition, many anti-corrosion woods are painted with paint to reduce the loss, and also isolate the human body and the anti-corrosion wood. Wash hands after touching the anti-corrosion wood, do not directly touch the anti-corrosion wood, etc., anti-corrosion is safe. How to choose anti-corrosion wood? Color: Wood preservatives are generally green or blue-green, because CCA or ACQ wood preservatives contain copper oxide. However, color is not the main quality indicator of anti-corrosion wood. Some unscrupulous manufacturers use soaking, even using simple methods such as paint painting to pretend to be qualified anti-corrosion wood. Consumers must distinguish more. Surface: Pay attention to the phenomenon of thrift, crack and deformation on the surface of the wood. Thrift is not only affecting the beauty of wood, but also an important channel for eroding wood such as bacteria and insects. Cracks and deformations are mainly caused by poor drying treatment. The wood treated with anti-corrosion treatment generally has a moisture content of less than 18% and will not crack or deform when placed in the air. Finish: Check the effect of anti-corrosion treatment. Intuitively, the surface finish of the anti-corrosion wood can be observed. The surface of the agent is not well treated with impurities such as powder, and the color is not uniform. It is best not to choose. Drug loading: When purchasing anti-corrosion wood, it is necessary to pay attention to the drug loading of anti-corrosion wood. For example, in the case of wood preservative treated with CCA-C wood preservative, if it is used outdoors, but does not touch the ground, the preservative should reach a drug loading of 4 kg/m3 or more; if used outdoors, contact the ground. Or immersed in fresh water, the preservative should reach a drug loading of greater than or equal to 9.6 kg / cubic meter. Infiltration: Infiltration refers to the depth of penetration of the preservative into the wood. The greater the infiltration depth, the less likely the protected high pressure treated wood will be damaged. For example, in the case of CCA-C treated wood, if it is used outdoors but does not touch the ground, the penetration depth should be greater than or equal to 85%; if it is used outdoors to touch the ground or immerse in fresh water, the penetration depth should be greater than or equal to 95%. Inspection certificate: To buy anti-corrosion wood, you must choose anti-corrosion wood with product inspection certificate. In addition, when selecting anti-corrosion wood, it is best to go to the well-known large building materials market to purchase anti-corrosion wood with certain brand recognition. The products can be more assured whether it is in the production process or the preservative used. . Wood anti-corrosion not only can extend the service life of wood, improve the performance of wood, but also expand the use of wood, reduce the consumption of wood resources, save wood resources, protect the ecological environment, and choose anti-corrosion wood is definitely the descendant of Fuze! Desktop Calculator,Desk Calculator,12 Digit Electronic Calculator,Desktop Graphing Calculator Guangdong Shunde Zuncheng Electronic Technology Co., Ltd. , https://www.junnocalculator.com
