Why does PC endurance board crack when processed by pc board?
pc board processing requires gentle scrubbing with a soft cloth or sponge dipped in neutral liquid. Do not use coarse cloth, brushes, mops and other hard and sharp tools for cleaning. What kind of plastic sheet, such as endurance board, endurance board, will crack. PS board, etc., will such a phenomenon occur? The molecular chain will be forced to orient, and the endurance board will have stress cracking. The main reason is the structure and performance of the endurance board material because I co-extruded the endurance board. However, due to the presence of benzene rings in the polycarbonate molecular chain, de-orientation becomes more difficult. Therefore, after molding, the oriented chain may still return to its natural state, but since the entire molecular chain has been frozen and the macromolecular chain is about each other, there will be residual stress in the product, which will eventually result in an endurance board. The product may appear stress cracking. But this is not because there are many different forces inside the polycarbonate, such as crack resistance.
pc board processing and the length of the molecular chain, the number of entanglements between the chains, and the force between the molecules are the key factors that determine the magnitude of this force chain. So as long as I ensure that the anti-cracking ability and the internal stress reach a balance, the cracking phenomenon of the endurance board will not appear. Can be used for heat insulation, sound insulation, etc. But in actual use, endurance board is a kind of building material with very good performance. You will find that the endurance board is prone to stress cracking. What is going on? Is there any way to solve it? Then how can we balance the crack resistance and internal stress? Because the higher the mold temperature, the higher the mold temperature. The mold temperature of the endurance board.
The easier it is for the molecular chains to move when processed by the pc board, which is conducive to the relaxation of the oriented molecules in the polycarbonate. After testing, the maximum temperature of the endurance board mold is controlled at about one hundred to one hundred and twenty degrees. When washing pc endurance board, rinse with warm water below 60℃. Use clean water to clean the dirt of the lower endurance board completely. Detergents that are corrosive to the endurance board are not allowed. 4. Use neutral detergent when cleaning. There must be no obvious traces of water. Wipe the board dry and polish it with a clean cloth.