Double protection of the environment

PU gaskets for recyclable HEPA filters with clean systems technology

Modern filtration technology, produced with a biomass of corncobs and wood flour. That doesn’t sound like it should work, right? But it does. Bio HoKu® is the new recyclable Z-line filter frame. It is the only one of its kind in the world. It was launched by the Swiss manufacturer of filtration technology, Tecnofil. The frame of the Bio HoKu® is produced from 80 per cent organic content. It consists of polylactic acid (PLA), which is obtained from waste from the renewable raw materials of corn and wood (EU). No agricultural land is used for this purpose. The filter frame contains no microplastics and is produced via injection moulding. 70 per cent less CO² is produced during the production process compared to conventional plastics.

The finished Z-line filter, sold under the brand name Home-Fil®, is used in residential installations and ventilation systems. To ensure that there are no leaks and that the filter in the system seals optimally, a polyurethane (PU) gasket is applied to one side. This is necessary to ensure that the filter offers a high level of safety.


Automated application of PU gaskets

The PU gaskets are applied with dynamicLine from DOPAG. The material is processed in a dynamic mixing head and the liquid gasket is then applied by means of a linear robot. It then hardens at room temperature. Handling is carried out manually. The user places one filter frame at a time on a workpiece carrier, then the material application begins, and the robot moves along the contour. Markus Schneiter is COO and operations manager at Tecnofil. He has been pleased with the service from DOPAG from the very beginning. ‘Right from the start of the project, it’s been clear that DOPAG is the right partner for us,’ says Schneiter. ‘All of our customer’s needs could be taken into account throughout the project and we were able to see the excellent performance and high quality of dynamicLine from a sampling.’

Successful approval of the PU gasket application at the DOPAG headquarters in Mannheim (Germany): Philipp Trübner, DOPAG Technical Center, Markus Schneiter, COO and operations manager at Tecnofil, Guido Löhr, Director Key Market Gasketing at DOPAG.

Clean operation of dynamicLine

Environmental friendliness is also an important factor in the production of the gaskets. Automatically applied gaskets generate significantly less waste than manually applied gaskets. The small volume of waste can also be disposed of with regular household waste. Furthermore, the system is rinsed exclusively with water and free of solvents during operation. Hazardous waste is avoided, and businesses can save materials and thus also costs, while maintaining high quality.

Further information

Your partnership with DOPAG

  • One contact for the entire system solution
  • All applications from one provider
  • Implementation of specific requirements and automation
  • Competent support from DOPAG experts
  • A dedicated technical centre for testing and customer training
  • Close collaboration with material manufacturers
  • Decades of experience in metering and mixing technology
  • Global distribution and service in over 40 countries

Your contact

Reference projects

Applications

Choose your applications:
All DOPAG articles at a glance:
  1. Planning metering and mixing systems correctly Planning metering and mixing systems correctly

    Precision is crucial when it comes to planning. Which factors are particularly important and how can common design flaws be avoided?

    More
  2. Metering mixing and applying thermally conductive silicone material Metering mixing and applying thermally conductive silicone material

    The vectomix TC metering and mixing system from DOPAG processes thermally conductive materials precisely and cleanly. This application shows the processing of Wacker Semicosil 9672.

    More
  3. Adhesive beading in the electronics industry Adhesive beading in the electronics industry

    Higher quantities in less time - For bonding housings for LED luminaires, DOPAG has configured an automated metering system that meets precisely these requirements.

    More
  4. With automated production to the optimum PU foam gasket With automated production to the optimum PU foam gasket
    Technology, material and component - these three factors must be optimally coordinated for the automated production of PU foam gaskets. DOPAG and Stassen Industries GmbH advise customers together.
    More
  5. FIPFG series production of PU foam gaskets for control cabinets FIPFG series production of PU foam gaskets for control cabinets

    SAE Schaltanlagenbau Erfurt relies on the dynamicLine from DOPAG for the individual production of control cabinets. We have visited them on site.

    More
  6. Dispensing two different types of grease Dispensing two different types of grease

    We configured an automated lubricant dispensing system that optimises production processes in the automotive industry.

    More
  7. Dispensing systems for the production of hydrogen tanks Dispensing systems for the production of hydrogen tanks

    The eldomix dispensing system fills an impregnation bath for the production of hydrogen tanks using the filament winding process.

    More
  8. Dispensing of liquid silicone rubber (LSR) in medical technology, food industry and e-mobility Dispensing of liquid silicone rubber (LSR) in medical technology, food industry and e-mobility

    Particularly strict conditions apply to production in the medical technology and food industries. A special configuration from DOPAG enables the use of the dispensing system in the clean room.

    More
  9. How to switch from manual to machine application How to switch from manual to machine application

    When is it beneficial to switch from manual dispensing to a metering and mixing machine? - We support you to identify all relevant influencing variables.

    More
  10. High cost-effectiveness and a wide range of applications for PU foam gaskets High cost-effectiveness and a wide range of applications for PU foam gaskets

    Learn all about Form-In-Place-Foam Gasketing (FIPFG) and how it’s already begun revolutionizing engineering industries and applications around the world.

    More
  11. Gaskets and electronics potting for wallbox production Gaskets and electronics potting for wallbox production

    PU gaskets and potting compounds protect the sensitive electronics in a wallbox against dust, dirt and moisture. We offer solutions for both applications.

    More
  12. Metering and mixing technology for the production of LNG tankers Metering and mixing technology for the production of LNG tankers

    We offer dispensing systems for a reliable application of adhesives and sealants in the manufacturing of liquefied natural gas (LNG) transport tanks.

    More
  13. Contactless application of grease and oil Contactless application of grease and oil

    The contactless application of lubricants meets all conditions for complex, automated production processes and is now standard in many industries. We present the options.

    More
  14. PU gaskets for recyclable HEPA filters PU gaskets for recyclable HEPA filters

    With the dynamicLine, DOPAG provides an automated and clean application of PU foam gaskets on recyclable HEPA filters from the Swiss manufacturer Tecnofil.

    More
  15. Precise bonding for the world’s first retractable solar roof Precise bonding for the world’s first retractable solar roof

    The Swiss start-up dhp technology constructed the world’s first retractable solar roof. The individual modules are manufactured with dispensing technology from DOPAG.

    More
  16. Gasketing and bonding of control cabinets Gasketing and bonding of control cabinets

    With the dynamicLine, DOPAG offers a system for both applications and thus enables an efficient, automated series production.

    More
  17. Manual application of lubricants Manual application of lubricants

    DOPAG offers special dispensing stations for the manual application of lubricants. With the help of an adapter, components such as O-rings and other seals can be greased or oiled manually. 

    More
  18. Coating self-adhesive labels with silicone Coating self-adhesive labels with silicone

    Self-adhesive labels and stickers are produced with silicone coating via coating systems. We provide the metering system to ensure material feed.

    More
  19. Potting electronics boards Potting electronics boards

    DOPAG provided a metering and mixing system for potting electronics boards for e-bike battery packs. 

    More
  20. Serial production of PU foam gaskets in the automotive industry Serial production of PU foam gaskets in the automotive industry

    With the dynamicLine, DOPAG offers an efficient solution for series production of PU foam gaskets in all industries.

    More
  21. Bonding and sealing in aircraft production Bonding and sealing in aircraft production

    The metering and mixing system volumix provides a smart solution for filling cartridges with adhesives and sealants in aircraft production.

    More
  22. Automated bonding of filters Automated bonding of filters

    For the production of plastic filter elements, DOPAG configured and automated metering and mixing system.

    More
  23. Automated application of sealants Automated application of sealants

    DOPAG provides an individual solution for the application of one-component sealant in the production of cardan shafts for special vehicles.

    More
  24. Series production of PU foam gaskets Series production of PU foam gaskets

    With the dynamicLine, DOPAG offers an efficient solution for series production of PU foam gaskets in all industries.

    More
  25. Metering and mixing system for adhesive bonding of automotive components Metering and mixing system for adhesive bonding of automotive components

    DOPAG develops a metering and mixing system for adhesive bonding of automotive components to ensure uniform standards worldwide.

    More
  26. Valves for grease spraying in furniture production Valves for grease spraying in furniture production

    DOPAG offers furniture manufacturers flexible and reliable solutions for the automated application of lubricants.

    More
  27. Efficient handling of components during dispensing sealing foam Efficient handling of components during dispensing sealing foam

    For the automated application of PU gaskets to control cabinet doors, DOPAG provides a dynamic mixing system in combination with a linear robot and shuttle sliding tables.

    More
  28. Honeycomb potting of sandwich panels Honeycomb potting of sandwich panels

    With the dispensing system coredis, the honeycomb core of sandwich panels, which are used for the interior of aircraft, could be filled homogeneously.

    More
  29. Sealant dispensing for truck manufacturer Sealant dispensing for truck manufacturer

    DOPAG successfully supported a truck manufacturer with a dispensing system for the manual application of a single-component sealant.

    More
  30. Valves for the contactless spray application of grease and oil Valves for the contactless spray application of grease and oil
    Valves for the spray application of grease and oil. Contactless application of lubricants in areas difficult to access.
    More
  31. Precise potting of filters and filter elements Precise potting of filters and filter elements

    Precise potting of filters and filter elements is necessary for high safety and purity. DOPAG supported a global manufacturer with individually configured metering and mixing systems.

    More
  32. Profitable production of components for control cabinets and enclosures Profitable production of components for control cabinets and enclosures
    With the dynamicLine from DOPAG, customers will be able to implement gasketing and bonding applications with just one system.
    More
  33. Metering systems for optimal lubricant dispensing Metering systems for optimal lubricant dispensing

    The requirements for the type of lubricant dispensing vary and always depend on the application being carried out. Learn here more about the four key factors for successful system design!

    More
  34. Continuous dosing of lubricants, adhesives and sealants Continuous dosing of lubricants, adhesives and sealants

    The membrane dispensing valve ensures a clean application and a high reliability in automated dosing processes.

    More
  35. Dispensing thermal gap fillers Dispensing thermal gap fillers

    Using thermal gap fillers leads to more advanced metering technology requirements - learn more about the solutions from DOPAG.

    More
  36. Automated application of PU gaskets on components Automated application of PU gaskets on components

    Compared to manually inserted seals, automatically applied PU gaskets offer many advantages.

    More
  37. Shot valve for contactless greasing Shot valve for contactless greasing

    DOPAG presents the shot valve in a new video: It is perfectly suited for contactless material application in highly automated processes.

    More
  38. Perfect FIPFG applications Perfect FIPFG applications

    The control cabinet manufacturer Fandis applies foam gaskets on various components. DOPAG has designed a FIPFG system for this application.

    More
  39. Individual grease dispensing Individual grease dispensing

    DOPAG has developed two special lubricant application systems for the production of ball screws in automotive industry.

    More
  40. Dosing systems for liquid 3D printing Dosing systems for liquid 3D printing

    The eldomix dispensing system fills material reservoirs of 3D printers with liquid printing technology.

    More
  41. Automated systems for electronic potting Automated systems for electronic potting

    DOPAG provides automated potting solutions for variuos applications - two practical examples!

    More
  42. Turnkey systems for automated metering and mixing Turnkey systems for automated metering and mixing

    CTO Daniel Geier talks in the interview about challenges in automated dispensing technology.

    More
  43. Automated grease metering Automated grease metering

    DOPAG presents a production cell, that could be used for greasing and oiling applications. Disocver also valves for contactless material application.

    More
  44. Dosing technology in rotor blade production Dosing technology in rotor blade production

    Metering and mixing systems are necessary in various applications in rotor blade production. DOPAG presents its solutions. 

    More
  45. Individual systems for automated glue dispensing Individual systems for automated glue dispensing

    The household appliance manufacturer Amica uses an invidual glue dosing system from DOPAG for the production of oven doors.

    More
  46. Automated production of foam gaskets Automated production of foam gaskets

    With dynamicLine, the metering technology manufacturer DOPAG presents a new dynamic mixing system for a wide range of applications.

    More
  47. Accurate dosing of grease and oil Accurate dosing of grease and oil

    DOPAG developed a special dosing system for the automated lubrication of gas springs.

    More
  48. Lubrication in the automotive industry Lubrication in the automotive industry

    Individual grease and adhesive dispensing systems from DOPAG guarantee highest quality electric parking brakes.

    More
Show more