TGfloc Series - Retention & Drainage Aids

TGfloc series are surface-active materials which cause the fines fraction to flocculate either with themselves or by adsorption onto the long fiber portion of the furnish, bringing greater retention by both chemical and mechanical means.

TGchem has two TGfloc systems as follow:

• TGfloc I : Cationic Linear polymers.
• TGfloc II : Cationic Branched polymers.
• TGfloc III : Anionic polymers.

TGfloc I and II series are copolymers of acrylamide with specially modified vinyl monomer and with trimethylaminoethylacrylateammonium chloride, for cationic PAMs, respectively. All of these systems can be used alone, or in combination with bentonite.

The flocculation with TGfloc I series (linear cationic polyacrylamide copolymer) of anionic furnish components represents the simplest model. A good example would be the retention of fillers and fines of fibers. When the cationic PAM gets close to the particles, it adsorbs by electrostatic attraction. Then, we observe a compression of the Stern layer by neutralization. This mechanism helps to the bridging of the two particles. Flocculated fillers and fines will then be retain more easily in the porous structure of paper.

If the shear forces of the machine are two high for the chosen polymer, the flocculates can be destroyed and the retention can therefore be reduced. A higher molecular weight polymer, or a more structured polymer have to be selected to better resist those forces.

TGfloc II series (highly branched products) can then be used in order to maintain good retention and runnability of the overall process. They are indeed very resistant to high shear that allows them to stabilize the flocculation all along the paper processing.

TGfloc branched products having relatively low molecular weight provide dense flocs with lower bounded water. They are well adapted to high basis weight papers where the press section may perturb sheet formation if too much water remains entrapped inside the paper structure. Structured polymers increase drainability by avoiding the presence of bind water within the compact flocs. More water is removed on the web enter the press section with a high dry content.

The advantage of such system is the recuperation of the broken flocs from the first stage of flocculation by the polymer. Then, a stronger floc is obtained. Drainage is improved without affecting the sheet properties and formation.

1. Typical Properties

*Anionic polyacylamide (TGfloc-DW05) having an extremely high molecular weight is also available, which can be used in "Dual retention program".

2. Packaging

3. Heath and Safety

Toxicity, caused by TGfloc series products alone and when incorporated into papers and paperboards, has not been reported so far. However, since TGfloc series are acidic, contact with the solution should be avoided. When exposed to the emulsions and its solutions, wash with fresh water immediately.

These data are given for information only. They do not constitute a specification and no liability is assumed, nor freedom from any existing patents.
We do not guarantee the applicability or the accuracy of this information and the suitability of our products in any given situation, since we cannot anticipate the many different conditions under which our products may be used.