The Application of OYIFLOC PolyDADMAC in Papermaking

As a kind of water-soluble cationic polymer, OYIFLOC PolyDADMAC has the advantages of the high density of positive charges, good watersolubility, controllable molecular weight, high efficiency, no toxic, and low cost, therefore itis widely used in oil drilling, papermaking mining textile printing and dyeing, daily-use chemicalindustry, sterilization, metal anti-corrosion, water treatment, andother fields.

OYIFLOC PolyDADMAC is mainly used as the standard titrant, anionic capture, and flocculantin the papermaking industry, and it can alsobe used in the production of conductive paper.

1. Used as a standard titrant

   With medium molecular weight and charge density, PolyDADMAC has become the standard cationic polymer in general use.However, it can only be applied when the ionic strength of the solution is low and the charge density of the measured polyelectrolyte is not too low. When the existing metal ion concentration exceeds a certain range, it is advisable to use a cationicpolymer labeled with a chromogenic group for titration.

2. Used as an anionic capture

   The cosed circulation of the whitewater system and the use of bleached wheat straw pulp with high positive charge demand inpaper mil increase the amount of dissolved and suspended interferents in paper materials, which usually reduces theeffectiveness of additives. Thus, adding OYIFLOC PolyDADMAC, a chemical auxiliary (anion extractor) that neutralizes charges, beforeother chemical additives can neutralize the dissolved and suspended interferers.

3. Used as a flocculant

   OYIFLOC PolyDADMAC is a kind of non-toxic cationic polymer flocculant with good performance, which plays a very great role inpapermaking sewage treatment. Bridging adsorption is produced between PolyDADMAC and suspended colloidal particles toachieve the flocculation effect.

4. Used in the conductive paper

   Usually, the most suitable surface resistance of conductive paper is 1060 -cm. Either too high or too low surface resistance wllcause a phantom latent image, video overlap, and other problems, resulting in poor quality copies. The commonly usedconductive substance is PolyDADMAC, and the diallyl monomer plays the cycization role during polymerization to formapyrrole ring. The polymer solution can be applied to the paper web by coating, dip coating, brush coating, or wet-end addition.