BOPET BOPP Line Pull Roll Stand Corona Roller Corona Treater Rubber Roller

Corona Roller Basis Information

Silicone rubber coated corona roller is a type of roller used in corona treatment processes for films. It is designed to enhance the surface properties of polymeric films, such as polyethylene films, by subjecting them to a corona discharge. The corona discharge helps improve the film's ink retention, coating adhesion, and printability.

Film corona treatment is usually operated by the corona treater and corona roller together, in the plastic film packaging industry and biaxially oriented film (BOPP, BOPET, BOPI) industry, corona roller mainly uses rubber coated roller. Regarding corona roller dimension, for example in Bruckner's BOPP line, PRS corona nip roller usually size in the diameter 450mm and face length 8700mm, corona roller in diameter 608mm and face length 8700mm, the rubber layer is mostly silica rubber.

Corona treatment refers to the phenomenon of partial discharge on the surface of the charged body in a gas or liquid medium, often occurring around the high-voltage wire and near the tip of the charged body, which can produce ozone, nitrogen oxide and other substances. In the substation and line above 110kV, there is often a light layer similar to the solar halo.

Most plastic films are non-polar polymers, the surface tension is low, generally in 29-30mN/m. In theory, if the surface tension of an object is less than 33mN/m, the currently known ink and adhesive can not be firmly attached to the above, so the surface of the corona method treatment.

The processing principle is to apply high frequency and high voltage electricity to the processing equipment to generate high frequency and high voltage discharge, resulting in small and dense purple-blue sparks. Various ions produced after air ionization accelerate and impact the plastic film in the treatment device under the action of a strong electric field. The chemical bonds of plastic molecules are broken and degraded, increasing the surface roughness and surface area.

The discharge also produces a large amount of ozone, which is a strong oxidizing agent that can oxidize plastic molecules and produce strong polar groups such as carbonyl and peroxide, thereby improving its surface performance.

Corona Roller Characteristics

Corona roller rubber roller used for the corona treatment of various film production lines, the rubber roller is made from imported silica rubber and has resistance to voltage 220,000V and its eletrical performance can reach the usage requirements of imported equipment, featuring the aging resistance and more stable service lifespan.

Corona Roller Advantage

Our corona rollers rubber roller are industry leading in both silicone and ceramic treater applications. With 100% spark testing prior to shipment you are ensured the highest quality and longest lasting corona roller rubber roller in the market.

Silicone rubber is a popular choice for Corona Rollers due to its relatively low cost and ease of replacement in the field.

It provides a smooth and uniform surface for the film to pass over during the corona treatment process.
Silicone rubber coatings have good dielectric properties, allowing for efficient corona discharge and treatment of the film.

Considerations for corona roller

While silicone rubber coatings are effective, they can be prone to wear and breakdown over time.

Ozone generated during the treatment process can react with the rubber material, leading to degradation and breakdown.

Rubber coatings may develop pinholes, which can result in spark-through or arcing.

Heat generated during the treatment process can also contribute to the deterioration of the rubber coating.

About us

Huatao Group was founded in 2008. We are a professional and leading supplier of various rollers for paper machine, corrugator, rubber & plastic industry, nonwoven fabric industry over 15 years of experience.

Paper Industry: forming roller, vacuum couch roller, dandy roller, breast roller, rubber press roller, stone press roller, rubber roller, dryer cylinder, size press roller, calender roller, pope reel roller, spreader roller, embossing roller.

Plastic & Rubber industry: chill roller, MDO preheating roller, MDO nip roller, MDO stretching roller, PRS cooling roller, corona treater roller, corona treatment nip roller, flame treatment roller, CFRP contact roller, CFRP tension roller, CFRP nip roller, winding core, coating drum, cooling drum, spreader roller, anilox roller, calender roller, embossing roller.

Nonwoven fabric industry: cylinder roller, doffer roller, CFRP guide roller, embossing roller, cooling roller, spreader roller.

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.

Huatao understands that each customer may have different requirements, which cannot meet from one factory, but we can meet, we are also familar with domestic factory advantages with matching superior quality and help customer not walk bend road.

We pursue each customer is buying and using HUATAO products with a rest assured heart and service is never end.