The Possible Reason and location of Corona Roller Fracture

Situation 1 :Fracture at the middle of Corona roller Core

1) the outer tube is welding together with several parts

2) thermal installation, it is stucked , then cut the outer tube and thermal installation again from another side, the weld the crack places

Situation 2: shaft and disc have the crack

      Reason: The interference fit may be too large, and the water inside will wear out the welding crack, causing leakage after a period of use.

Situation 3, fracture at the 1/3 places of the corona roller core  

         Reason: It is possible that the interference is too small and metal fatigue

Feature of Corona Roller :
The imported special silica gel used should have passed the high-voltage (200,000 volts) inspection, to make the surface of the substrate have higher adhesion.

Corona Roller Introduction:

Corona Roller serves as a critical part of the corona treatment system, where it supports and conveys the BOPP film as it undergoes surface modification. The corona roll works in conjunction with an electrode: when high-voltage electricity is applied, a corona discharge (a form of plasma) is generated between the electrode and the roll's surface. This discharge alters the BOPP film's surface properties by increasing its surface energy, which enhances adhesion capabilities—making the film more receptive to inks, adhesives, or coatings in subsequent processing steps.

The technical Data of Corona Roller :

Double-shell construction, water inlet and outlet at same end of roller 
Inner and outer shell material Q345B,
 outer shell interference assembly process with journal 42Crmo 
Dynamic balancing G2.5 with maximum speed 630m/min
silicon rubber thickness :4mm 
hardness:75-80 shore A, 
Ra1.6um
 Runout ≦0.10mm
 cylindricity ≦0.10mm
Withstand voltage:200KV 

Successful case

Corona roller have been provided to more than 100 BOPP/BOPET production lines in 10+ countries and regions around the world, cooperative customers include many well-known companies and it helps increase the efficiency of the film stretching process by more than 5-10%.

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Key Words:
Corona Roller, Corona Treater Roller, Corona Treatment Roller, Corona Rubber Roller, Silicone Rubber Roller