Quality issues caused by thin film corona

May 10, 2024

Quality issues caused by thin film corona

Problems that may arise during thin film corona treatment include:

The film becomes brittle: If the injection power is too high during the corona treatment, the secondary valence bond force between the film molecules may be affected, making the film brittle and affecting the use effect. Especially when rolling capacitors, the edges cannot be rolled evenly, which reduces production efficiency.

Waste liquid pollution: Substances such as electrons and ozone produced by corona treatment may combine with water molecules in the air to form waste liquid containing nitrite and nitrate components. If these waste liquids are not cleaned up in time, they may contaminate the membrane surface and reduce the wetting tension and adhesion of the membrane.

Improper temperature control: During corona treatment, the membrane surface temperature should be controlled within an appropriate range. Too low a temperature may result in insufficient energy for polarization and chemical changes of molecules on the membrane surface, affecting the surface tension.

Corona intensity and treatment time control: Excessive corona treatment time may lead to excessive surface tension of the film, embrittlement or even degradation, which is not conducive to subsequent processing of the film.

Equipment problems: including non-parallelness of the corona treatment roller and electrode, inconsistent tension during film operation, etc. These will lead to uneven corona treatment and affect the wetting tension and adhesion of the film.

Back corona: For thinner films, air may be brought into the back at high speeds, causing back corona and affecting the processing effect.

Uneven processing: Uneven electrode gaps may lead to uneven processing in the left and right direction of the film width.

Equipment overheating: Generator cabinet overheating may be caused by a clogged fan filter or a fan that is in reverse motion.

Ozone problem: A strong ozone smell may be caused by improper air volume matching of the exhaust fan, reverse fan rotation, or blocked pipes.

Dirty electrodes: Dirty electrode units will affect discharge uniformity and may cause electrode damage.

Film corona breakdown: Corona breakdown may cause polyureaates or additives to float on the film surface, affecting the fastness of the heat seal layer. At the same time, excessive corona value may cause adhesion of the film layer and affect the subsequent composite process.

Poor heat sealing: Insufficient corona treatment may result in no significant improvement in film surface wettability, poor ink adhesion, and poor heat sealing.

The above issues need to be strictly controlled and managed during the corona treatment process to ensure the quality of the film and the feasibility of subsequent processing.

Huatao supply Industry Rollers included Rollers for Plastic film, Rollers For Metallurgy. We supply quality Gearboxes and Electric Motors as well.

Author:

Mr. Jack Yang

E-mail:

Jack.y@huataogroup.com

Phone/WhatsApp:

+86 13315113775

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Huatao Group was founded in 2008. We are a professional and leading supplier of various rollers, motors, gearboxes, and rotary joints to the plastic & rubber, metallurgy, paper, corrugated board, printing & dyeing, and textile industries over 15 years of experience. With a strong commitment to innovation, reliability, and customer satisfaction, Huatao Group has become a trusted provider in the industry and our products have been exported to more than 96 countries and have a good reputation.. Products: Gearboxes: HUATAO offers a diverse range of gearboxes designed for various applications across industries. These gearboxes are known for their efficiency, durability, and precise power transmission. They are available in different types, including helical, bevel, worm, and planetary gearboxes, catering to the specific needs of customers. Motors: Huatao provides a comprehensive selection of motors suitable for a wide range of applications. Their motor offerings include electric motors, servo motors, and specialized motors for specific industries. These motors are known for their high performance, energy efficiency, and reliable operation. Ours motors are designed to meet the...

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