Pet Blowing Machine Processing Temperature Is Very Important

Update:01 Oct 2018
Summary:

Processing plastic bottles with pet blowing machine, th […]

Processing plastic bottles with pet blowing machine, this is a common processing project in plastic processing. So where are the important points to pay attention to in this processing? What I want to tell you is temperature. The temperature is crucial for processing plastic bottles. When operating a pet blowing machine, you must pay attention to some temperature control to ensure that a suitable plastic bottle is manufactured.

 

No flow temperature: The highest temperature at which no flow occurs under a certain pressure. It is to add a certain amount of plastic to the barrel at the upper end of the capillary rheometer die, and heat it to a certain temperature. After the temperature is known, the new 10MIN is applied, and a constant pressure of 50MPA is applied. If the material does not flow out of the die, the material temperature will be released after the pressure is released. The difficulty is increased by 10 degrees, and a constant pressure of the same magnitude is applied after the temperature is kept for 10 minutes, and so on until the melt flows out of the die, and the temperature is reduced by 10 degrees, which is the non-flowing temperature of the material. 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 plastic.

 

Decomposition temperature TD: refers to the polymer in the viscous flow state, when the temperature is further increased, the degradation of the molecular chain is intensified, and the temperature at which the polymer molecular chain is significantly degraded is the decomposition temperature. Melting temperature TM: For a crystalline polymer, the temperature at which a three-dimensional remote ordered state of a macromolecular chain structure is transformed into a disordered viscous state, also called a melting point. It is the lower limit of the processing temperature of the crystalline polymer molding. Glass transition temperature TG: refers to the transition temperature of an amorphous polymer (including an amorphous portion in a crystalline polymer) from a glassy state to a high elastic state or by the latter. It is the lowest temperature for the free movement of the macromolecular segment of the amorphous polymer, and is also the upper limit of the working temperature of the product. More content is welcome to inquire.

 



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