Corona Treatment
Bopp-Pet Corona System
the most important producers of BOPP film around the world have joined our technology to reach important treatment results with no downtime in production.
Features
- Web width up to 10.5 mt.
- Special electrodes in Aisi 316 stainless steel able to expand freely without modification of the pre-setting of air gap (easy heat expanding system).
- Special electrodes rotating movement gives the possibility to the electrodes to move away (without damage) from the corona roller in case of impact with thick parts on the film coming from the die.
- High stiffness of the structure holding the electrodes. The electrodes and the hood are in fact connected to a robust central beam that gives mechanical stability to the system.
- Easy air-gap regulation for perfect uniformity of the treatment level along the width.
- Electrodes opened pneumatically for easy webbing up.
Converting Corona System
For plastic and metallized films; usable on Printing and laminating machines with working width up to 4000mm.
- Discharge Bars in special ceramic material with profile specifically designed for Me.Ro. S.p.A.
- New holding system for the ceramic bars. The new system is extremely robust and allows to eliminate completely the insulating materials used before. The only insulating material used are ceramic insulators easy to clean.
- System completely immune from humidity in the air.
- These characteristics makes it suitable to the use in any environment condition (tropical environments).
- Possibility of easy replacement of the single ceramic bar. Down time drastically reduced.
- Possibility of easy dismounting of the complete discharge group for a more accurate cleaning procedure.
- New Air-GAP setting system through micrometric screws. The new system makes the Air-gap setting operation easy and fast. Pneumatic opening of the discharge groups for an easy inletting of the web.
- Corona discharge roller: Corona roll in aluminium/steel covered with special ceramic coating high thickness to guarantee a longer life and a great resistance to the discharge attacks (ozone).
- The roll can be mounted installed on special bearings for easy rotation or supplied with extended shaft for motorization. Rolls statically and dynamically balanced.
Cast Film Corona System
Installations up to 350 m/min and Web width up to 7000 mm for very difficult films (CPP with high amount of additive applied). Guarantees a total absence of back side treatment.
Features:
- The special design of the stainless-steel (AISI 316) electrodes ensures easy heat expansion thus without modification of the preset air gap.
- Electrodes opened pneumatically for easy webbing up.
- High stiffness of the structure holding the electrodes. Another important point for the stability of the air-gap.
- Use of big diameter nip roller to eliminate any backside treatment.
- Able to treat one or two sides of the web.
- Specific power (energy density) kept strictly constant during running.
- Corona roller covered in silicon rubber or isolated ceramic.
- Corona roller supplied with extended shaft for motorization.
- Speed sensor mounted on the corona roller.
- Rollers statically and dynamically balanced.
- Special electrodes rotating movement gives the possibility to the electrodes to move away (without damage) from the corona roller in case of impact with thick parts on the film coming from the die.
- Easy air-gap regulation from outside the hood containing the electrodes.
- Safety switches close down the power supply in case of accidental opening of the discharge groups.
- Electromagnetic (EMC) compatibility in accordance with EN-55011 and EN 50082-2 standards.
- Optional: Possibility of installation of spreader roller. It also helps to eliminate back side treatment. Possibility to have the overpressure version for explosive proof environment.
Blown Film Corona System 
Absolute uniformity of the gap during running via
- The particular design of the electrodes (any electrode is kept in working position through big isolators connected to a strong central beam)
- High stiffness of the structure holding the electrodes. Another important point for the stability of the air-gap.
Features:
- Web width up to 3500 mm.
- Specific power (energy density) kept strictly constant during running.
- Corona roller covered in special silicon sleeves (other coatings can be supplied upon request)
- Special electrodes in aluminium. (Possibility to install also full electrodes in stainless steel.)
- The treater can be equipped with segmented electrodes instead of full ones in order to avoid treatment in particular areas. The segments can be individually moved away from the corona roller.
- The construction is made to guarantee uniformity of the gap. The electrode is in fact connected to the structure not on the lateral sides but in many points on the upper beam of the station. This allows an easy expansion when running.
- The construction system is done in a way that allows an easy and fast setting of the partialization during a production change and moreover guarantees an absolute stability of the chosen position of the segments during running.
- Easy air-gap regulation from outside the hood containing the electrodes.
- Electrodes opened pneumatically for easy webbing up.
- Rollers statically and dynamically balanced.
- Speed sensor mounted on one corona roller. Safety switches close down the power supply in case of accidental opening of the hood containing the electrodes.
- Electromagnetic (EMC) compatibility in accordance with EN-55011 and EN 50082-2 standards.
Adhesive Tape Corona System
Faster and faster accelerations on the slitter cutters during the last years have created many difficulties. The solution to problems of quality in producing special no noise adhesive tapes for the packaging industry.
A fast and exact electronic control of the specific power (energy density) able to guarantee an absolute absence of noise also at the beginning and at the end of the single adhesive rolls.
Features
- Web width up to 2500 mm.
- Specific power (energy density) kept strictly constant during running. This is one of the key factors for this application.
- Corona roller covered in special silicon sleeves (possibility to overcover with special anti-sticking materials)
- Anti-sticking system. The adhesive film is moved away from the corona roller in case of stop of the line to avoid any glue to remain on the silicone.
- Rollers statically and dynamically balanced.
- Speed sensor mounted on one corona roller.
- Special electrodes in aluminium. (Possibility to install also full electrodes in stainless steel.)
- Electrodes opened pneumatically for easy webbing up.
- The construction is made to guarantee uniformity of the gap. The electrode is in fact connected to the structure not on the lateral sides but in many points on the upper beam of the station. This allows an easy expansion when running.
- High stiffness of the structure holding the electrodes. Another important point for the stability of the air-gap.
- Easy air-gap regulation from outside the hood containing the electrodes.
- Safety switches close down the power supply in case of accidental opening of the hood containing the electrodes.
- Electromagnetic (EMC) compatibility in accordance with EN-55011 and EN 50082-2 standards.
Label Corona Treatment
Installable on printing machines, it gives you the possibility to treat both non-conductive and conductive materials (such as aluminium foils and metalized films). Speeds of production of 250 m/min have already been reached with this equipment obtaining great benefits for adhesion of inks.
Features
- Able to treat one or two sides of the web
- Web width up to 500 mm
- Specific power (energy density) kept strictly constant during running
- Corona roller in aluminium covered with conductive ceramic to guarantee a longer life and a great resistance to the ozone attacks
- Rollers statically and dynamically balanced
- Speed sensor mounted on the corona roller
- Discharge bars in special ceramic material, protected by a sturdy aluminium housing
- Easy removal of discharge group through fasteners for cleaning
- Easy air-gap regulation
- High Voltage inlet studied to have a safe connection absolutely protected by the dust
- Ozone exhaust system coming out on the transmission side in order to avoid any bending of the flexible hose and a better aesthetic effect
- Safety switches shut down the power supply in case of accidental opening of the discharge groups
- Electromagnetic (EMC) compatibility in accordance with EN-55011 and EN 50082-2 standards
- Optional: Overpressure version for explosive proof environments
Sheet Corona Treatment
Installable on extrusion lines and printing lines, it gives you the possibility to treat materials up to 20 mm of thickness. The particular design of the electrodes (any electrode is kept in working position through big insulators connected to a strong central beam) together with the stiffness of the structure guarantees an absolute uniformity of the gap during running.
Features
- Able to treat one or two sides of the web
- Web width up to 3500 mm
- Specific power (energy density) kept strictly constant during running
- Corona roller in aluminium covered in special silicon sleeves (other coatings can be supplied upon requests)
- Rollers statically and dynamically balanced
- Speed sensor mounted on the corona roller
- Special electrodes in aluminium. (Possibility to install also full electrodes in stainless steel)
- Possibility to have segmented electrodes. The segments can be individually moved away from the corona roller.
- Electrodes opened pneumatically for easy webbing up
- High Stiffness of the structure holding the electrodes. Another important point for the stability of the air-gap
- The construction is made to guarantee uniformity of the air gap. The electrode is in fact connected to the structure not on the lateral sides but in many points on the upper beam of the station. This allows a free expansion when running.
- Easy and fast setting of the partialization during a production change.
- Absolute stability of the chosen position of the segments during running.
- Easy air-gap regulation from outside the hood containing the electrode
- Safety switches shut down the power supply in case of accidental opening of the hood containing the electrodes
- Electromagnetic (EMC) compatibility in accordance with EN-55011 and EN 50082-2 standards
- Overpressure version for explosive proof environments
Induction Cap Sealing
to all sectors in the industry of packaging: food, beverage, pharmaceutical, chemical, cosmetic, agrochemical and petrol.
During the last years the use of an Alu-foil in the world of beverage has become more and more popular. To guarantee the freshness of their products the fruit juices producers in fact are obliged to use a barrier material able to avoid oxygen to get in contact with the content.
The production capacity of these filling lines is very high (up to 60.000 b/h) and the producers ask for an induction sealing system able to perform such results with the maximum reliability.
The choice of the majority of the big beverage producers
Plasma Treatment
Vacuum Plasma Treatment
Under vacuum plasma system for many different substrates to be used in a metallizing machine.
This system is positioned before the coating stage, it ensures a better adhesion of the aluminium (or any other coating material) and better barrier properties on the final product.
It is fundamental in fact to have a surface perfectly prepared before the coating stage, this helps the deposition of the coating material, giving uniformity and avoiding the creation of pin holes and other disuniformities in the barrier layer.
Atmospheric Plasma Treatment
Treatment with addition of gas (atmospheric plasma treatment). Using different types of gas, the plasma obtained will give the substrate the required characteristics for any specific application. -Standard corona system.
Treatment in overpressure. In this case the system can be used in explosion proof environments. By blowing clean air or gas inside, it can be avoided the presence of explosive substances (solvents) inside the box.
3D Plasma
To increase adhesion on your products, where conventional corona is not the solution because of geometrical problems.
The new generation discharge generator represents the best industrial standard for this type of device. The -MOSFET- modules installed in it, featuring high switching speed with low losses, combined with the configuration of the power circuits, ensure high performance and complete self-protection in the event of accidental overloads.
Unquestionably, this generator, together with a sophisticated operator terminal and the new plasma guns, represent the most up-to-date state of the art for plasma equipment.
Features:
- High efficiency thanks to the configuration of the power circuits and the use of -MOSFET- modules
- Electronic protection in the short-circuit proof inverter power modules.
- Sinusoidal output wave-form
- Automatic adaption to various load conditions
- Single phase supply voltage 220/240V (without need for a network transformer)
- Construction according to norm EN-60204-1
- Electromagnetic compatibility (EMC) in accordance with norms EN-5511 and EN-50082-2
- Monitoring, display of work magnitudes and alarm signalling by special operator terminal PLC
- Portable, compact, air-cooled generator
- Remote-controlled start-stop
Applications & Grades
They are a base material in applications that do not require any formability beyond minimal bending and/or roll-forming.
- Large and Small Electric Motors
- Generators
- Ballasts
- Transformers
