Cationic Starch (Royal CAT 30)

"Royal-Cat30" is a modified starch that is mainly used at the we tend. Cationic starches are preferred over native starches as they are positively charged and therefore, easily attracted by the negatively charged fibers and fillers. This results in increased fiber-to-fiber and fiber-to-filler bonds which in turn leads to increased strength as well as fines and filler retention.

“Royal-Cat30” is a quaternary ammonium type (Starch-O-CH2-CHOH-CH2-N- (CH3)3 Cl) which is cationic in all pH range. It contains medium level of cationic charge (medium degree of substitution). Usual dosage of Royal-Cat30 varies between 2-6% depending on machine parameters.

Cooked paste of Royal-Cat30 is quite stable. Its usage helps in following: Improvement in strength properties due to better fiber-to-fiber bonding, Improvement in retention due to better fiber-to-fines n filler bonding, Better drainage and sheet formation, Enhances utilization of recycled fibers, Gives a cleaner paper-making system.


Source Maize/Tapioca Starch Powders
Appearance Fine, white, odourless, dry powder
Moisture 12% (max)
Size of granules Passes 85 mesh
PH of 10 % aqueous solution 7-9 (as desired)
Ash (Dry solid basis) less than 2 %
Nitrogen content 0.30% + 5%
D.S. 0.034 – 0.037
Ionic character Cationic
Phase Separation No phase separation for 24 hours.


  Prepare a lump-free suspension (20-60 gpl) in fresh cold water by continuous stirring.

  Gradually heat (direct or jacketed) to +95°C, and keep under mild stirring for 20-30 minutes.

  Dilute to around 1% and add the required dose suitably with metering pump or otherwise.


  As a standard, it is available in 50 Kg. HDPE bags with inner liner.

  However, special packing (like Jumbo bags/Paper bags/25 Kg bags) can be arranged as required.


  Do not use hooks, drag the bags on truck or any other platform.

  Make sure unloading labours have clean hands and heads covered with clean cloth/cap.

  Bags should be stored on clean dry platform, kept covered with clean piece of tarpaulin. Also ensure that the storage area is dry, covered, away from humid conditions, hazardous, explosive and aromatic chemicals.

  Shelf life, if stored properly, can be one year.