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Fence antiseptic way and fence life
Generally
highway fence life in 10 years, the number of no small scale manufacturers dominate the market at low prices , in order to reduce costs and produce shoddy fence , the use of time in 3-4 years , can not be achieved using requirements.
One fence preservative method: Powder Dip method , which originated in the fluidized bed method, the so-called fluidized bed was initially occurs in the gas furnace used in Winkler oil catalytic cracking , and then developed a two-phase solid-gas contacting process , gradually for metal coated areas . Sometimes it is still called " fluidized bed coating method " , the actual process is added to the powder coating of the porous permeable container bottom ( flow channel ) , and treated by the blower into the air from the powder coating to achieve flip "flow state . " Into a fine powder scattered evenly distributed .
We know the second stage fluidized bed is fluidized solids (first stage fixed-bed stage, the second stage air flow conveying phase ) , continue to increase the flow rate (W) on the basis of a fixed bed , and the bed began to swell loose bed height begins to increase , the powder particles are each float , thereby leaving the original position to a certain extent for the mobile , then it enters the fluidized-bed phase. bc fluidized powder layer in the section description expands the height (I) increases with increasing gas velocity , the pressure in the bed (△ P) does not increase the flow rate changes in a certain range without affecting the fluid unit power required , which is characteristic of the fluidized bed , is the use of this feature to implement the coating process . Uniformity within the fluidized powder fluidized state is critical to ensure uniform coating . On the use of fluidized bed powder coating are " vertical fluidized " fluidized tested to identify the required number , can be applied generally to the highest suspension rate in the fluidized powder up to 30 ~ 50 %.
Rail fence, municipal quarantine network, bilateral
fence have been preheated to degreasing powder coating above the melting point , dipping into the fluidized bed after plastic powder adheres evenly , then plasticized polymer crosslinking leveling a plastic composite products.
