1. Good fluidity and fast hardening speed, so the preheating and molding temperature should be appropriate, and the coating, mold clamping and pressing speed should be fast.

2. Large molding shrinkage.

3. There are a lot of water and volatile matter, which is easy to absorb moisture and agglomerate. It should be preheated and dried during molding to prevent re-absorption, but if it is too dry, the fluidity will decrease. Moisture and decomposition products are present during molding, and there is acidity. The mold should be chrome-plated to prevent corrosion, and exhaust should be exhausted during molding.

4. The molding temperature has a great influence on the quality of plastic parts. If the temperature is too high, it will easily cause decomposition, discoloration, and uneven color of the bubbles. When the temperature is too low, the fluidity is poor and it is not shiny.

5. The material is fine, the specific volume is large, and the material is inflated. When forming large plastic parts with pre-pressed ingots, it is easy to produce ripples and flow lines, so it is generally not suitable for use.