Softal Corona Treatment Machine

Cast film corona treatment

The corona treatment technology has the characteristics of high reliability, low cost, excellent controllability, and easy operation, and therefore, it has become one of the advanced technologies generally recognized in the field of plastic film surface treatment. In particular, the journal invited Dr. Peter Palm of Softal Electronic to describe the requirements of cast films for corona treatment equipment.

According to Dr. Peter Palm, the requirements for corona treaters are not the same, depending on the actual application. In film extrusion, cast film processing is the most difficult. The reason for this is that the cast film has poor heat resistance and the base material has a small tension. Therefore, it is necessary to ensure that the back surface is not treated. Generally, high-dose additives such as a high-slip additive CPP film are required. In order to meet these requirements, the corona treater must be specially designed.

Softal's new Intelliblade design

When casting films are extruded, it is important to avoid folding valves. Dr. Peter Palm believes that the following measures should be taken: a coating roll is arranged in front of each corona treatment roll, a nip is set at the contact line between the film and the treatment roll, a treatment roll is arranged, and electric power is distributed on the multi-blade electrode.

Practice has proved that the motor-type bow spreading roller (banana-shaped roller) is superior to other designs. The clamping roller should be designed with high rigidity and anti-static special rubber coating. The length and diameter can be determined according to the convex surface.

Selecting the electrode design that meets the requirements is the key to realizing the performance optimization of the corona treater. For the corona electrodes currently used for corona electrodes, especially for cast film extrusion, it is necessary to have the ability to obtain the best treatment effect without pulling or damaging the material being processed. Moreover, operational reliability is a key factor in reducing costs, and reliability is closely related to low maintenance rates. Finally, miniaturization of the electrode design is important to help integrate the corona treater with the customer's production line.

Increasing the quality of the treatment without pulling or damaging the treated material has always been a major goal of the development of corona electrodes. To achieve this goal, the most important thing is to improve the quality of processing by adopting low power, optimizing thermal management, and eliminating surface beams.

With the continuous improvement of Multi-Blade multi-blade design, Softal's new Intelliblade design represents a major technological breakthrough in the field of high performance corona electrodes. Moreover, Intelliblade successfully solved the surface beam problem and set a new standard for high power, small size, low material stress corona electrodes.

The basic idea behind the Intelliblade design is to use variable spacing between the electrode blades of a multi-blade electrode. This simple method has greatly improved the performance characteristics. Based on this, it can now optimize various parameters and specific power to eliminate surface beams. With the addition of an airflow control system, heat management is further improved and the material stress is reduced to a minimum.

Reprinted from: Adsale Industrial Network