DENAFILTER vs. Conventional Leaf Disc Filters
How filter design affects gels, filter life and pressure drop, and how to switch without changing your housing.
Every leaf disc filter has the same job: stop gels, black specks and foreign particles before they reach your die. How well it does that job, and for how long, comes down to three parts: the filter media, the support plate and the retainer.
This four-page guide breaks down where conventional leaf disc filters and DENAFILTER differ. The biggest difference is the retainer. You’ll see how hub-ring-free design reduces stagnant resin, lowers pressure drop and makes cleaning easier. Then you’ll see what it takes to switch in the housing you already run.
What’s inside:
- How a leaf disc works. An exploded view of the five layers and how melt flows through them.
- Depth vs. surface filtration. Why sintered metal fiber traps and breaks up soft gels that can slip through a mesh opening.
- The retainer difference. How removing the hub ring cuts the stagnant resin that turns into gels and black specks.
- Pressure-drop data. A polyolefin film-line example: about 580 psi with the DENAFILTER TP retainer vs. 870 psi with a conventional retainer.*
- Side-by-side comparison. Media, gel capture, retainer design, stagnation, pressure drop, cleaning and materials, all in one table.
- How to switch. Standard sizes from 4 to 12 in, media grades from 3 to 60 µm, and ways to test before you commit.