Product Technical Information Sheet  -  DS-DUALSTAR

"DS-DUALSTAR" is an amphoteric starch, developed for use in the wet end of paper industry. It is from the house having unrivalled experience in the field of manufacturing and supplying Spray Starches viz. “DS-HIBURST” and “DS-HIBOND” as well as high quality cationic starches “DS-CATSTAR”.   Its use intensifies following:

• Much improved retention of fines and fillers.
• greater internal strength improvement due to additional fibre to fibre bond.
• Better sheet formation coupled with better drainage.
• Better print quality.

PRODUCT DESCRIPTION

“DS-DUALSTAR” has a cationic charge as well as anionic charge attached to it, which is done by fixing phosphate group to cationic starches. Varying level of charge is attached by controlling the d.s. The product is equally effective in acid, neutral or alkaline papermaking. Since it has both the charges, it is capable of attracting both types of charged particles present in the paper making furnish.


HOW DUALSTAR WORKS IN PAPER MAKING:

An amphoteric starch can be represented by following chemical formula:

                                                              +     _
St - O - CH2 - CHOH - CH2 - N (CH3)3 Cl / St - O - POOH - O - Na

Papermaking furnish mainly consists of constituents which usually have slight anionic as well as cationic charge available for electrochemical and surface interactions with added polymers. DUALSTAR contains quarternary amino groups that act as cationic charge carrier as well Phosphorous groups that act as anionic charge carrier. DUALSTAR will adsorb to cellulose and other constituents, induce patch-type and bridging flocculation and strengthen the bonding between furnish components.

The strengthening effect of DUALSTAR is much greater in a fiiled sheet with high filler level. This is because of the effect of the starch as a lubricant.

DOSAGE

0.2 to 0.5 %, depending upon the paper making system.

BROAD TECHNICAL SPECIFICATIONS

Appearance                               : Fine, white to off white dry powder.
Moisture                                    : 11 - 13 %.
Size of granules                         : Passes 85 mesh
pH of 10% aqueous solution        : 5 - 8
Solubility in water                       : Soluble when cooked
Ash (Dry solid basis)                  : less then 2.5 %
Character                                   : Cationic + anionic

PREPARATION FOR DESIRED RESULTS

Prepare a suspension (free of lumps) of 3-6% in fresh cold water by stirring. Heat to 
95 °C. & keep under mild stirring for 20-30 minutes. Dilute to 1% before addition.

AVAILABLE PACKAGING

It is available in 25 / 50 Kg. moisture proof lined or ESKP bags.

HANDLING, STORAGE & SAMPLING

Please take following care during handling, storage and sampling  :

• Do not use hooks, drag the bags on truck or any other platform.
• Make sure that unloading labour have clean hands and heads covered 
  with clean cloth/cap. 
• Bags should be stored on clean platform, kept covered with clean piece of tarpaulin. Also ensure that storage area is dry, covered, away from humid  conditions, hazardous, explosive and aromatic chemicals.