220V Cooling Fan plastic material

The plastic parts for the "220V Cooling Fan" blade, has the following characteristics:
(1) It is a good environment in which to work, at room temperature, do not bear the impact load, nor in acid, alkali, salt of the environment;
(2) production, for normal daily life, and called this plastic material is high quality and inexpensive, and the human body does not produce any side effects.
(3) "220V Cooling Fan" difficult internal structure is more complex shape.
(4) The blade is curved molding and die manufacturing space is very difficult.
(5) "220V Cooling Fan" required to have the more beautiful appearance, good insulation. So I initially choose to adopt a common plastic.