How much do you know about wood preservatives?
Nowadays, preservatives are mainly CCA, ACQ and CAB. The main component of CCA is copper and arsenic. The main component of ACQ is ammonia soluble alkyl amine copper. The main component of CAB is copper file.
Antiseptic wood according to the use of conditions to determine the amount of antiseptic medicine, a detailed reference to the national standard "Antiseptic wood".
曩昔几十年来，木材防腐处理的办法首要以CCA为主. 其首要化学成分为铬化砷酸铜（Chromated Copper Aarsenate），它清洁、无臭，处理后的木材外表能够上漆。高质量的CCA 药剂具有非常安稳的特性,其杰出的防腐功能使其得到了广泛的运用。长期运用的经历通知我们通过CCA 处理的木材能够在野外各种恶劣环境中运用，是非常抱负的木材维护用化学防腐药剂。
In the past few decades, the main method of wood preservation is CCA. Its primary chemical composition is Chromated Copper Aarsenate, which is clean, odorless and can be painted on the surface of treated wood. High quality CCA has very stable properties, and its outstanding anti-corrosion function makes it widely used. Long-term experience tells us that wood treated with CCA can be used in a variety of harsh environments in the field. It is a very ambitious chemical preservative for wood maintenance.
CCA中含有极端微量的砷元素， 近来人们从心理上开端忧虑其对健康的 损害，美国于2004年1月1日开端已停止运用CCA 处理过的木材（工业和特别环境方面在外）。但与此一起美国权威的组织机构又清晰表明"没有任何科学依据证明CCA对人体健康的损害。我国行将发布的防腐木材运用的行业标准中清晰了CCA是能够运用的防腐药剂之一。
CCA contains extremely trace amounts of arsenic, and recently people have begun to worry psychologically about its health hazards. The United States began to stop using CCA-treated timber (industrial and environmental externally) on January 1, 2004. But along with this, authoritative U.S. organisations have made it clear that "there is no scientific evidence that CCA is harmful to human health. It is clear that CCA is one of the antiseptics that can be used in the industry standards for the use of antiseptic wood to be issued in China.
ACQ （Alkaline Copper Quaternary）的首要化学成分为烷基铜铵化合物。 它不含砷、铬等化学物质，对环境无不良影响，且不会对人畜鱼及植物形成损害。这种处理办法被以为可能成为CCA的有用替代品，但试验证明ACQ 不如 CCA安稳，比较易于丢失。现在本钱也高出CCA近20%。因而从国内市场看，这两种处理办法的防腐木材应该会共存一段时间。跟着相关技能的不断改进，从长远看ACQ将有可能成为未来防腐木材处理的首要办法之一。
The primary chemical component of ACQ (Alkaline Copper Quaternary) is alkyl cuprammonium compound. It does not contain arsenic, chromium and other chemical substances, has no adverse effects on the environment, and will not cause damage to people, livestock, fish and plants. This treatment is thought to be a useful alternative to CCA, but tests have shown that ACQ is less stable and more likely to be lost than CCA. The cost is also nearly 20% higher than CCA. Therefore, from the domestic market, these two methods of anticorrosive timber should coexist for a period of time. With the continuous improvement of related skills, ACQ may become one of the most important methods for future preservative wood treatment in the long run.
The most common way to preserve wood internationally is to use an insoluble water-based preservative to inject the preservative into the wood fibers together with the pressure applied on the wood in an airtight vacuum tank. Pressure treated wood is more stable, and preservatives can be useful in preventing molds, termites and insects from invading wood. Then the treated wood has an excellent anticorrosive function for a long time in the harsh environment of the field.
Vacuum high pressure impregnation
This process is a key step in preservative treatment. The first step is to complete the physical process of inserting preservatives into wood. The chemical reaction of some useful components of preservatives with starch, cellulose and sugars in wood is completed, and then the living environment of bacteria and insects that form wood decay is damaged. Wood preservative wood function.
High temperature qualitative
At high temperatures, the preservatives are continuously permeated into the wood as evenly as possible, and the chemical reactions between the useful components of the preservatives and the starch, cellulose and sugar in the wood are continuously completed. It will further damage the living environment of wood rotting bacteria and insects.
Natural wind drying
Natural air drying requires air drying in the actual use of wood. This process is to get used to changes in the structure of wood cells that occur in outdoor open-air wood floors and field-specific anti-corrosive wood floors due to environmental changes, so that they can be fully fixed in the mutation process, and then avoid changes in the use process. Change.