Guar derivative FOR paper industry
Guar Paper Derivative
Guar gum is used as a wet-end additive. It gives denser surface to the paper used for printing. It is also useful in foresheet formation, Mullen bursting strength, fold strength, tensile strength, measure of the force required, to pull a fiber from the surface of sheet, machine speed that all parameters are increased and porosity of the paper is decrease
|Constitution|| Mannogalactan Derivatives
|Appearance|| Creamish fine powder
|Preservation||Preservative added to avoid fungus and decomposition of paste and powder|
|Solubility|| Cold water soluble
|Paste percent||1 Kg. powder – 99 Kg. water (Prepared at 80 ° C)|
|pH||Neutral (7 + 0.5)|
|Viscosity of 1% paste at room temperature after heating 80 ° C.|| 300 – 340 cps
(by Brook field Viscometer Model RVT)
|Compatibility with other thickeners||Good with thickeners except Crystal gum and gum arabic. It coagulates with Borax in alkaline conditions.|
Typical Chemical Properties
|Moisture||12 % max|
|Ash content||1.2 % max|
| Acid insoluble Matter
| 2.5% max
10 PPM Max.
| Carbohydrate including Gum contents
| 85% minimum
03 PPM Max.
Guar paper gum provides
- Improvement in paper strength
- Improvement in printability
- Reduction in dusting and lilting
- Better sheet formation and fibre distribution
Preparation of gum paste
Guar paper gum is made in solution of 1% consistency in water at room temperature under high speed stirrer and then heated to 80 ° C. for 15-20 minutes so that the solution is ready after it cools. It is then added to the pulp at convenient point at fan pump, head box or at stock gate before the formation of paper.
25 Kg. laminated paper bags with PE lining inside.
Sealed bag under normal condition for 6 months.
Guar Gum should be stored in cool and dry place, away from direct sun light.