Characteristic Analysis of Polymer Polyethylene Sheet

High-molecular-weight polyethylene sheet is a kind of high polymer. Its special mechanical properties are greatly affected by temperature and relative molecular quality. It should be highly valued when designing high-frequency polyethylene sheet mechanical parts.

Now with the increase of relative molecular mass, the wear resistance of ultra-high molecular weight polyethylene is enhanced, the elongation decreases with the increase of relative molecular mass, and the yield strength decreases with the increase of relative molecular mass. The relative molecular mass increases slightly, the impact strength increases with the increase of the relative molecular mass, and the molecular weight of the polymer polyethylene plate reaches a maximum value of about 3 million. After more than 3 million, the impact strength decreases. It becomes larger as the temperature increases, but reaches a maximum at around 25 °C. Then, it decreases with increasing temperature. Even if the polymer polyethylene sheet has a certain impact strength at minus 200 ° C, the maximum tensile strength and yield strength decrease with temperature.

The high-molecular-weight polyethylene sheet not only retains the high impact strength of the ultra-high molecular weight polyethylene sheet, the friction coefficient is low, the self-lubricating polymer polyethylene sheet has excellent performance, and can meet the different performance requirements of customers. Such as flame-retardant polymer polyethylene plate, the lining plate is difficult to ignite, can be automatically extinguished within 3-10 seconds after leaving the fire source, and does not drip, the amount of smoke is small, the volatile gas is harmless to the human body, and is blocked by the state. After testing by the Fuel Materials Research Laboratory, the product was identified as a green and environmentally friendly material with high promotion and use value.

As a liner, high-molecular-weight polyethylene sheet is made of metal lining material, which combines the strength of metal with the wear resistance of U-polymer polyethylene sheet and the performance required by customers. . Flame-retardant polymer polyethylene sheet is widely used in China’s electric power, coal, steel, cement, coking and other industries to effectively prevent fire caused by coal spontaneous combustion and other factors.

Cleaning and maintenance of polymer boards

1. Polymer board manufacturers are also crucial to the cleaning work after the use of polymer boards. On the one hand, we can clean up the coal hanging on the wall of the coal bunker without causing unnecessary waste. On the other hand, it can extend the use time of our polymer wear plate. The benefit of this can be said to be There are so many, so don’t neglect the cleaning work of our polymer wear plates.

2. For the inner wall of the coal bunker of the polymer board, we should clean the material stuck on the silo wall and repair it flat. It is necessary to ensure that the inner wall of the lining and the coal bunker is not tight, and it is necessary to Note that the installation is from bottom to top during installation.

3. The temperature of the polymer sheet has a great influence on the quality of the product. Note that the specific middle temperature of the mold should be slightly lower than the temperature at both ends. It is necessary to have uniform and stable temperature conditions to assist; the lip spacing should be equal to or slightly less than the thickness of the polymer wear plate, and the uniform and stable temperature ensures that the flow rate of the extruded melt amount is smoothly equal pressure, so that the longitudinal thickness error of the liner Smaller.

4. The temperature control of the molding die should be too high or too low to affect the flow speed of the melt, so that the thickness of the formed polymer wear plate will produce a large error. At higher temperatures, the melt is easily decomposed and there are bubbles in the liner; when the temperature is low, the surface of the liner is dark and not smooth.