Ppo material drying temperature?
Ppo material drying temperature: Ppo drying temperature is 120 degrees to 140 degrees, and the drying time is between 2 to 4 hours. The Chinese name of polyphenylene oxide (PPO) is also called polyphenylene ether b, and it is one of the top five general engineering plastics in the world.
PPO plastic drying temperature: The heat distortion temperature of existing products is in the range of 170-460°F.
1) PPO plastic amorphous material has low water absorption, but moisture will cause defects such as silver lines and bubbles on the product surface. For this purpose, drying can be carried out: drying at 110°C for 2 hours.
2) The molding shrinkage of modified PPO is small, usually 0.2% to 0.7%, so the product has excellent dimensional stability.
Ppo plastic drying temperature:
The heat distortion temperature of existing products is in the range of 170-460°F.
PPO/PPE injection molding process
1) PPO plastic amorphous material has low water absorption, but moisture will cause defects such as silver lines and bubbles on the product surface. For this purpose, drying can be carried out: drying at 110°C for 2 hours. .
2) The molding shrinkage of modified PPO is small, usually 0.2% to 0.7%, so the product has excellent dimensional stability.
3) The molding temperature of modified polyphenylene ether is 280-330 degrees, and the molding temperature of modified polyphenylene ether (MPPO) is 260-285 degrees. The melting temperature of the injection molding process of PPO plastic raw materials: 270-290℃, the barrel temperature is controlled at 260~290℃, and the nozzle temperature is about 10℃ lower than the barrel temperature.
4) Mold temperature: Due to the high melt viscosity of the modified PPO plastic, a higher mold temperature should be used in the injection molding process. Generally, the mold temperature is controlled at 100~150°C. When the mold temperature is lower than 100°C, thin-walled plastic parts are easy to fill and delaminate; when the mold temperature is higher than 15°C, defects such as bubbles, silver lines, and warpage are likely to occur.
5) Injection pressure: Increasing the injection pressure is beneficial to the filling of molten materials. Usually, the injection pressure is controlled at 100-14OMPa.
6) Holding pressure: 40%-60% of injection pressure
7) Back pressure: 3-10 MPa (30-100bar)
8) Injection speed: products with longer flow channels need to be injected quickly; however, in this case, please ensure that the membrane has sufficient ventilation.
9) Screw speed: medium screw speed, reduced linear speed is 0.6m/s
10) Measuring stroke: 0.5-3.5D
11) The amount of remaining material: 3-6mm, depending on the measuring stroke and screw diameter.
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