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 eldomix, variomix 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
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
Bonding and sealing
Bonding and sealing
The wave or prong-shaped filter mats are attached tightly to the frame or housing using an adhesive.
The application of gaskets to filters and housing enables the sealed installation of filter subsequently.
Potting with polyurethane (PU) attaches the mostly wave or prong-shaped filter mats to the frame or housing.
With the dynamicLine, DOPAG provides an automated and clean application of PU foam gaskets on recyclable HEPA filters from the Swiss manufacturer Tecnofil.
For the production of plastic filter elements, DOPAG configured and automated metering and mixing system.
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.
Compared to manually inserted seals, automatically applied PU gaskets offer many advantages.
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.
Bonding and sealing is becoming an increasingly popular method of joining components without screws. With DOPAG systems, applications can be realized reliable and precise.
With dynamicLine and the new dynamic mixing head, DOPAG offers an efficient solution for all applications relating to gasketing.
Dynamic mixing headDynamic mixing headThe 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.