POROPLAST - developed by Durst Filtertechnik.

The name POROPLAST stands for microporous polyethylene from the company Alfred DURST Filtertechnik. The polymer base material is ground, fractionated, mixed etc. to generate the properties it needs for the intended purpose.

The application field of the porous material is very wide-ranging. A significant weight reduction is achieved due to the open pore volume. Additives in a variety of concentrations can be added to improve the filtration properties.

Special properties such as:

  • Hydrophylicity
  • Anti-static behaviour
  • Colouring
  • The strength and rigidity

can be improved.

When raw, POROPLAST has hydrophobic properties, it can be statically chargeable and is white. POROPLAST is made of low-molecular polyethylene and is primarily used for open-pore parts, whilst higher-molecular polyethylene is used for very fine-pore applications It should be noted here that a higher molecular weight also goes hand-in-hand with higher resistance to mechanical, chemical and thermal loads.

Profit from the capillary effect of our porous products for capturing and transferring fluids!

Do you have an idea of where and how you could use this effectively in your process or your product?
Talk to us and we will find the best solution together.

+49 (0) 7143 8548–0

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Production precision and processing

When manufacturing porous parts, it is essential to bear in mind that, depending on its composition, the sintering material will shrink to a greater or lesser extent when it undergoes thermal treatment.

It can generally be processed using all conventional mechanical methods, such as lathing, milling and drilling. Boards and tubes that cannot be sintered from one single piece are made of several segments that are welded together.

Durst Filtertechnik offers a decisive advantage:

From the production line we developed in-house, to the sintered plastic we developed to the individual test benches, quality at Durst starts in our development phase and includes quality controls throughout all of our product creation phases. For instance, we have very precise optical measuring process for measuring complex parts.

In-depth expertise and the healthy common sense of a medium-sized company have made us a reliable business partner to our customers since the company was founded.


General construction rules

The following rules apply when designing moulds made of sintered plastic:

  • Boreholes and undercutting vertical to the pressing direction can only be realised in a reworking phase.
  • Boreholes should have a minimum diameter of 2 mm.
  • It is better not to choose an overly extreme ‘slenderness ratio’ depending on the height of the workpiece. Several parts can be joined on a case-by-case basis.
  • If the outer edges need to be rounded, it is recommended that these are created as chamfers (30° – 45°) with levelled-off inclinations.
  • Usually, parts with one or several mould separators require more tool and/or production effort. The part thickness should not undercut 1.5 mm.

We will be happy to answer any request for detailed information.


Fire behaviour

The material POROPLAST ignites with a flickering, yellowy flame. The material has no self-extinguishing properties. When the non-contaminated material is burned, carbon dioxide and water are produced in addition to soot.