Metering systems for the production of filters

Metering adhesives, sealants, potting compounds and sealing foams

Filters are used in all private, industrial and medical fields – from vacuum cleaners and air filters in cars and aircraft to highly specialised filters for cleanrooms or respirators.

For the production of filters, adhesives, potting materials and sealing foams are used which are metered, mixed and applied automatically using DOPAG systems. On the one hand, the filter mats, which are usually wave or prong-shaped, are attached to the frame or housing using an adhesive or by means of PU potting. On the other hand, sealing foams are applied to the frame or housing so that the entire filter can be used in sealed form at its place of use, for example for air suction in vacuum cleaners, for suction of fresh air in cars or for special filters in respirators.

DOPAG provides systems for all applications in filter production – gasketing, bonding and potting – that are precisely tailored to the application in question. With the dynamicLine dynamic mixing head, for example, several applications can be carried out using a single system, such as PU potting and bonding the filter paper to the filter frame. For pure bonding and potting applications, DOPAG offers reliable, precise systems with piston and/or gear pumps, such as eldomixvariomix or vectomix. The metering and mixing system is customised based on the application and requirements in question.

Compliance with standards
In the production of HEPA and particle filters, DOPAG systems enables all relevant standards to be met. They process all materials, for example potting compounds with antibacterial function for medical technology or for the use of the filters in cleanrooms.

Sorted according to decreasing efficiency cut-off, air filters are divided into:

  • Antimicrobial seals for air conditioning systems
  • Low-emission seals for car interiors
  • Sealing of HEPA filters for interior ventilation systems
  • ULPA (ultra-low particulate air) filters
  • HEPA (high-efficiency particulate air) filters
  • EPA (efficient particulate air) filt

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Potential applications for our metering systems:

Cleanroom filters, e.g. for IT or medical technology, respirators, ventilation systems for cars and lorries, particle filters for lorries, air conditioning systems, vacuum cleaners, electrical engineering, control cabinets.

We offer metering and mixing technology for these applications

Gaskets

Gaskets

The application of gaskets to filters and housing enables the sealed installation of filter subsequently.

Bonding and sealing

Bonding and sealing

The wave or prong-shaped filter mats are attached tightly to the frame or housing using an adhesive.

Potting

Potting

Potting with polyurethane (PU) attaches the mostly wave or prong-shaped filter mats to the frame or housing.

Application cases

Markets

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All DOPAG articles at a glance:
  1. Automated application of PU gaskets on components

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

    More

In Potting, resins such as silicones, polyurethanes or epoxy resins are used in liquid form. For the production process, DOPAG offers various metering and mixing systems.

  1. economix

    economix

    The economix range of systems are compact, solvent free, pneumatically driven piston pump metering and mixing systems.

  2. eldomix

    eldomix

    The eldomix 100/600 range of systems are compact, solvent free, gear pump driven metering and mixing systems.

  3. variomix

    variomix

    The variomix range of systems are solvent free, compact, pneumatic or hydraulically driven piston pump metering and mixing systems.

  4. vectomix

    vectomix

    Vectomix is used to handle multi component materials. Due to its compatibility and modularity, two vectodis single component piston metering with equal or different sizes are used.

Bonding and sealing is becoming an increasingly popular method of joining components without screws. With DOPAG systems, applications can be realized reliable and precise.

  1. economix

    economix

    The economix range of systems are compact, solvent free, pneumatically driven piston pump metering and mixing systems.

  2. eldomix

    eldomix

    The eldomix 100/600 range of systems are compact, solvent free, gear pump driven metering and mixing systems.

  3. variomix

    variomix

    The variomix range of systems are solvent free, compact, pneumatic or hydraulically driven piston pump metering and mixing systems.

  4. vectodis

    vectodis

    Vectodis is used to handle single component materials. Just a suitable material supply and metering computer is required.

  5. vectomix

    vectomix

    Vectomix is used to handle multi component materials. Due to its compatibility and modularity, two vectodis single component piston metering with equal or different sizes are used.

With dynamicLine and the new dynamic mixing head, DOPAG offers an efficient solution for all applications relating to gasketing.

  1. Dynamic mixing head

    Dynamic mixing head
    The dynamic mixing head with its new valve technology has been designed for mixing of low to  high-viscosity polymeric reaction substances for foaming, bonding, sealing, and potting.

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