Introduction to the temperature of the blow molding machine

I

The blow molding machine glass transition temperature TG refers to the transition temperature of an amorphous polymer (including the non-crystalline part in a crystalline polymer) from a glassy state to a highly elastic state or from a highly elastic state to a glassy state. It is the minimum temperature for free movement of the macromolecular segments of amorphous polymers, and also the upper limit of the working temperature of the product.

II

Blow Molding Mechanical Melting TemperatureTM: For crystalline polymers, it refers to the three

The temperature at which a dimensionally distant ordered state changes into a disordered viscous state, also known as the melting point. is the lower limit of the molding temperature for crystalline polymers.

III

The decomposition temperature TD of the blow molding machine refers to the polymer in a viscous flow state. When the temperature is further increased, the degradation of the molecular chain will intensify, and the temperature when the polymer molecular chain is significantly degraded is the decomposition temperature.

VI

The blow molding equipment flow temperature TF refers to the temperature at which the amorphous polymer changes from a highly elastic state to a viscous flow state. It is the lower limit of the processing temperature of amorphous plastics.

The above is the literal meaning of the four temperatures, and the next analysis is the correlation of flow temperature. If the material does not flow out of the die, it is difficult to raise the temperature of the material to 10 degrees after depressurization, hold the temperature for 10 minutes, and then apply a constant pressure of the same magnitude, which continues until the melt flows out of the die, in order to reduce the temperature by 10 degrees. degree is the no-flow temperature of the material. The highest temperature that does not flow under a certain pressure is to add a certain amount of plastic into the barrel at the upper end of the capillary rheometer die, heat it to a certain temperature, and apply a constant pressure of 50 pressure after constant temperature for 10 minutes.