Powder as release agent
In flat film extrusion lines, films are usually processed into rolls. Polyolefin plastics and rubber webs are characterized by good stretchability and low slippage. Depending on the winding tension and surface properties, a tendency to stick occurs in the winding, leading to the formation of piston rings, picking and low speeds in the slittering process and high static charges due to separation processes.
In bag manufacturing and processing, adhesion tendency leads to deficiencies in the shingling of bags and process interruptions in the filling lines due to poor bag opening behavior.
POWDER IS NOTHING WITHOUT CONTROL
WEKO powder application systems (WPA) enable the application of a minimal, hardly visible release layer on flat film, rubber webs as well as in and on film pouches. The patented metering system and application nozzles optimized for the process ensure a minimal and uniform powder application of a few milligrams per m².
Release powders made from natural starch or calcium carbonate reduce the adhesion and tack of the films. Films wind up more evenly and run more easily and quickly in the slitter with reduced tensile force.
In bagging and packaging machines, release powder causes smooth guiding and processing. Electrostatic charges due to friction are minimized. This results in higher processing speeds and minimal scrap rates.
Advantages at a glance:
Precise, minimal and repeatable application rates
Highest possible application efficiency
Uniform powder distribution
Automatic adaptation to film speed
Resource-saving due to minimal consumption
Intuitive, easy operation
The WEKO-AP systems generate a fine powder-air mixture that is sprayed onto the film surface.
With the encapsulated WEKO-ESC the powder-air mixture is applied in a spray chamber. For extremely uniform distribution, the film web is electrostatically discharged. An extraction system avoids contamination of the surrounding area by fine dust particles.
Product solutions
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- Cast film extrusion
- Blown film lines (water cooled)
- Bag making machines
- Rewind / slitter processes
References
„A diversified portfolio“
EK-Pack Folien GmbH, based in Ermengerst-Wiggensbach, was founded in 1977 and has been run as a family business ever since. With 210 employees, the company develops and produces modern film systems, achieving an annual output of over 30,000 tons.
The complex requirements of the sales markets are met by comprehensive know-how, reliable and motivated employees as well as modern production facilities. The wide-ranging portfolio of flexible films is used in particular in the food, non-food and medical/pharmaceutical sectors.
„Sustainable protection of our everyday needs“
Aligned with the realization of the vision: “Sustainable protection of our everyday needs,” KP is a leading global supplier of rigid and flexible packaging and specialty film solutions for pharmaceutical and medical devices, food, beverages, and cards.
Since 2009, WEKO’s silicone spray-on process has been successfully used at various Klöckner Pentaplast facilities. The system is used in the production of PET films made from 100% recycled material, which are then further processed into thermoformed trays. When spraying on the silicone/water mixture, the primary aim is to denest the trays (anti-blocking).
„Leading manufacturers in Europe“
The SÜDPACK Packaging Group is one of Europe’s leading manufacturers of coextruded flexible and rigid films, flexible plastic composites and bags.
Another focus is on printing films using flexographic, gravure and digital printing processes. The family-owned company has a total of 18 sales offices and sites, with production facilities in Germany, France, Poland, the USA and Switzerland.
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