Dualstar

Introduction

“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-HIPLY” as well as high quality cationic starch “CATSTAR-350”. Its use intensifies following:


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

Product Description : 

“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 PAPERMAKING:

An amphoteric starch can be represented by following chemical formula:


St – O – CH2 – CHOH – CH2 – N (CH3)3 CI / 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 filled 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 Specification
Appearance Fine, white to off white dry powder.
Moisture 11-13%
Size of granules Passes 65 mesh
pH of 10 % aqueous solution 5-8
Solubility in water Soluble when cooked
Ash (Dry solid basis) less than 2.5 %
Character Cationic + anionic

Preparation for desired result :

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 Packing :

It is available in 50 Kg. (or as per request) HDPE bags with inner liner.

Handling Storage and Sampling :

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

2. Bags should be stored on platforms, cleaned with hot air blower and kept covered with clean piece of tarpaulin. Also ensure that storage area is dry, covered, away from humid and hazardous conditions.

3. Bags should be stored on clean 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.