Retention agents for paper production

SEPAR CHEMIE has a wide range of polymer flocculants for the retention in paper production and dewatering of pulp suspensions.

Commercial form of retention agents

Besides the well-known commercial forms
•    Emulsions
•    Powders
•    Beads (micro pearls)

we offer a completely new generation of water-based and mineral oil-free dispersions.

Application areas of environmentally compatible retention agents

The oil-free dispersions POLY SEPAR® KW and AW lend themselves to the effective and environmentally friendly retention of bulking agents, ashes and fibres, even in the case of high conductivity in closed circuits.

Excellent retention agents

All these products are produced in quality “paper grade” with fast and residue-free solubility.

These products are subject in particular to the special criteria of the XXXVI Recommendation by the BfA for toilet tissue and food packaging.

Additional advantages of oil-free retention agents for paper production

The water-based POLY SEPAR® KW and AW are also suitable for the retention of recycling paper and offer the following advantages:

•    Easy and fast solubility
•    Mineral oil-free
•    Solvent- and surfactant-free
•    Environmentally compatible
•    Easy incorporation without extensive mixing and dosing systems
•    Reduction of foam problems
•    Reduced water consumption
•    Improvement of bulking agent retention
•    The highest effectiveness in closed circuits with high conductivity.

Here you will find our brochure for downloading: Innovative chemicals for the paper industry.

Starch reduction in paper production

A further original product is our POLY SEPAR® Ply Bond. It is a synthetic, anionically charged polymer, which is completely soluble in water. It is used in the production of multilayer papers and cardboards, which are bonded with starch. POLY SEPAR® Ply Bond is added to the water-starch solution and is sprayed onto the paper layers.

The advantages of POLY SEPAR® Ply Bond for paper producers are:

•    Increases the adhesion between the paper sheets
•    Partially replaces the starch at a ratio of 1/10
•    Considerable cost savings
•    Applicable in a wide pH-range
•    Reduces the COD burden through reduced starch consumption

Crystallization inhibition in paper production

POLY SEPAR® C 1 is a concentrate of phosphonate and / or acrylate, which was developed in order to inhibit crystalline deposits on the paper machine, particularly in the area of
•    suction rolls
•    shower nozzles
•    sieves
•    felts

Advantages of POLY SEPAR® C 1 in paper production

•    Increase of the machine operation time
•    Significant reduction of the down times for cleaning work
•    No influence at all on the paper quality

Increasing the dry strength during paper production

POLY SEPAR® DS 1 is a water-based organic polymer dispersion with amphoteric character. POLY SEPAR® DS 1 produces a special bridge bonding in the fibre-fibre area which achieves a measurable increase in strength of between 10% and 15%.

Advantages of dry strength products for paper producers

  • Increase of CMT
  • Increase of burst index
  • Better retention
  • Better ply adhesion
  • Reduction of starch in the pulp up to complete substitution

Application areas of POLY SEPAR® DS 1 in paper production

POLY SEPAR® DS 1 is added undiluted to the pulp or directly at the headbox pump to the paper circuit. Beforehand trials at a laboratory scale can propose the suitable dosage.


We would be pleased to offer you individual product advice to suit your specific requirements. Please use our contact form or call us at: +49 (0)4102-666-30.
We will be glad to provide consulting services on the required systems technology. Here, you can access our field service.



Please contact us should you have any questions.
Contact form

You could reach us also by telephone or by mail.
+49 (0)4102-666-30

This year we have again supported „Doctors without Borders“ and UNICEF with a donation.

Opening Hours

Monday – Thursday: 8 a.m. – 5 p.m.
Friday: 8 a.m. – 3 p.m

Monday – Thursday: 8:30 a.m. – 4 p.m.
Friday: 8:30 a.m. – 2 p.m.

Our Partner Company in Sweden and Scandinavia:

Separ Chemie GmbH | Erika-Keck-Strasse 4 | DE – 22926 Ahrensburg | Phone:+49 (0)4102-666-30 | Email: info[at]­separ-chemie.­de