In modern industrial production, the corona roller has attracted much attention due to its unique role and wide application field. The corona roller is mainly used to improve the adhesion of the material surface, especially in the processing of plastic film, paper and other materials that are difficult to adhere.

This article will introduce the definition, working principle and specific application and role of the corona roller in industrial production in detail.

What is a corona roller?

A corona roller is a device that treats the surface of a material by corona discharge. Corona discharge is a high-frequency and high-voltage discharge phenomenon. When the air between the high-voltage electrode and the surface of the material is ionized, corona discharge is formed, thereby changing the physical and chemical properties of the surface of the material. The corona roller is usually composed of a high-voltage electrode, a roller body and a corona treatment device. The high-voltage electrode generates corona discharge on the surface of the material to achieve the modification of the surface of the material.

What is the working principle of the corona roller?

The working principle of the corona roller is based on the corona discharge effect. The specific steps are as follows: the high-voltage electrode generates an electric field → air ionization forms corona → surface modification → improve adhesion.

1. High-voltage electrode generates electric field: The high-voltage electrode of the corona roller applies a high-frequency high-voltage electric field to form a strong electric field environment.

2. Air ionization forms corona: Under the action of high voltage, the air between the electrode and the material surface is ionized, resulting in corona discharge.

3. Surface modification: The active particles such as high-energy ions, electrons and free radicals generated during the corona discharge process react with the material surface to change the chemical composition and physical structure of the material surface.

4. Improve adhesion: After corona treatment, the polarity and wettability of the material surface are significantly improved, thereby enhancing the adhesion of the material surface to inks, coatings and adhesives.

What is the role of the corona roller?

The corona roller plays an important role in many industrial fields. Its main functions include improving the adhesion of the material surface, enhancing the adhesion of the material and improving the surface treatment effect. The following are the specific roles of the corona roller in different fields.

1. Plastic film processing:

Plastic film is widely used in packaging, printing and electronics industries. However, since the surface of plastic film usually has low polarity and low surface energy, its adhesion with ink, coating and adhesive is poor, which affects subsequent processing and use.

The role of corona roller in plastic film processing

The role of corona roller in plastic film processing is mainly reflected in improving ink adhesion, enhancing coating adhesion and improving bonding performance:

● Improving ink adhesion: Through corona treatment, the polarity and surface energy of the plastic film surface are significantly improved, enhancing the adhesion of ink and ensuring the clarity and durability of the printed pattern.

● Enhancing coating adhesion: Corona roller can effectively improve the adhesion of plastic film to various coating materials (such as moisture-proof coating, protective coating, etc.), ensuring that the coating is evenly covered and firmly attached.

● Improving bonding performance: The surface of plastic film after corona treatment is easier to bond, improving the sealing and durability of packaging materials.

2. Paper processing:

In the process of paper processing, especially in the production of coating, printing and composite materials, the adhesion and adhesion performance of the paper surface are crucial to product quality. Traditional paper processing methods are difficult to meet the requirements of high adhesion and high adhesion.

The role of corona roller in paper processing

The role of corona roller in paper processing is mainly reflected in improving coating effect, enhancing printing quality, and improving composite effect:

● Improving coating effect: Corona treatment can significantly improve the polarity and wettability of paper surface, enhance the adhesion of coating materials (such as varnish, protective coating, etc.), and ensure uniform and lasting coating effect.

● Enhance printing quality: Through corona treatment, the adhesion between paper surface and ink is significantly improved, ensuring the clarity and color vividness of printed patterns, and improving the quality and durability of printed products.

● Improving composite effect: Corona roller can effectively improve the bonding performance of paper and other materials (such as plastic film, metal foil, etc.), ensuring the strength and stability of composite materials.

3. Metal surface treatment:

Metal surface treatment is of great significance in industries such as electronics, automobiles and construction. However, the low adhesion and low adhesion performance of metal surface have adverse effects on subsequent processing and use.

The role of corona rollers in metal surface treatment

The role of corona rollers in metal surface treatment is mainly reflected in improving coating adhesion and enhancing bonding performance:

● Improving coating adhesion: Corona treatment can significantly improve the polarity and surface energy of the metal surface, enhance the adhesion of coating materials (such as anti-corrosion coatings, decorative coatings, etc.), and ensure that the coating is evenly covered and firmly adhered.

● Enhanced bonding performance: Through corona treatment, the adhesion between the metal surface and the adhesive is significantly improved, ensuring the reliability and durability of the bonding effect, and improving the performance and life of the product.

4. Other material treatment:

Corona rollers are also widely used in the surface treatment of other materials, such as textiles, rubber, glass, etc. Through corona treatment, the surface adhesion and adhesion performance of these materials are significantly improved to meet the processing and use requirements of different industrial fields.

What are the advantages of corona rollers?

Advantages of corona rollers: high efficiency (surface treatment of large areas of materials in a short time), reliability (treatment effect is not affected by material type and thickness), environmental protection (no harmful waste gas and waste liquid are generated).

1. High efficiency: The corona roller can perform surface treatment on a large area of material in a short time, improving the adhesion and adhesion performance of the material surface. Compared with traditional surface treatment methods, corona treatment is more efficient and suitable for high-speed production lines and mass production.

2. Reliability: The treatment effect of the corona roller is stable and reliable, and it can evenly generate corona discharge on the surface of different materials to achieve uniform surface modification. Its treatment effect is not affected by the type and thickness of the material, and it has strong adaptability.

3. Environmental protection: No harmful waste gas and waste liquid are generated during the corona treatment process, which is environmentally friendly. Compared with other chemical surface treatment methods, corona treatment is more environmentally friendly and in line with the green production concept of modern industry.