Application · Polymer filtration
Melt filtration is the process stage where unwanted solids are separated between polymer preparation and downstream processing. The filtration surface is defined in the context of the process and existing system.
Process context
The filtration surface sits between melt preparation and downstream processing. Its role is defined within this process chain.
The polymer is melted and prepared for the operating conditions required by the process.
Unwanted solids are separated at the filtration surface and the filtered polymer melt moves to the next stage.
The filtered melt is used in pelletizing, forming or other downstream processing steps.
Filtration principle
In scraper-cleaned continuous melt filtration systems, the filtration surface provides the melt flow path while retaining solids that cannot pass through the apertures on the inlet face. Surface cleaning and contamination discharge arrangements vary by system.
This schematic explains the system context in which the micro-perforated filtration plate operates. EMC’s manufacturing scope here is the filtration plate; the machine, scraper and discharge arrangement are shown to explain the application context.
Polymer melt reaches the active filter surface.
Micro-apertures provide the melt flow paths.
Solid particles that cannot pass through remain on the inlet face.
Removes material accumulated on the surface.
Removed material is directed to a separate discharge path.
Continues into the process from the outlet side.
Inlet and outlet apertures, plate thickness, taper, pitch and total open area are reviewed together. Flow and separation behaviour are considered alongside melt viscosity, throughput and the characteristics of the contamination.
The pressure difference across the filter helps monitor flow resistance. Loading can increase this difference; assessment also considers melt viscosity, throughput and open area.
Application inputs
The same nominal aperture can represent a different technical context with a different polymer, contamination load or operating condition. The application is therefore reviewed through the following inputs together.
These inputs are considered together with aperture geometry, perforation pattern, open area and overall component form.
System component
EMC polymer filtration plates are configured around the existing machine and component geometry. Nominal aperture, micro-hole geometry, active area and machine interface are defined together at product level.
Explore polymer filtration platesTechnology
Micro-aperture geometry and high-density perforation patterns are reviewed for manufacturability together with the material, thickness and overall component geometry.
Explore laser micro-drilling technologyQuality & verification
Review how aperture geometry, surface condition, component form and system interface are checked against the technical requirement.
Explore quality & verificationTechnical contact
A machine or system reference and basic process information may be enough to begin an initial review. An existing part, photograph or drawing can support the review where available.
