Latex Technology (2142605)   Old Code : 152602

Syllabus

Sr. Topics Teaching Hours Module Weightage
1
Natural Latices:

Tapping: Introduction, Early tapping system, modern tapping system, factors which affect the yield of latex & rubber, other methods of tapping, improvement of latex yield.

4
5 %
2
Preservation of Natural rubber Latex:

Preliminary consideration, The ideal preservative for natural rubber latex, Ammonia as a preservative, Low-ammonia preservation system, other preservative for natural rubber latex.

5
5 %
3
Concentration of natural rubber Latex:

Preliminary consideration, Concentration by evaporation, creaming, centrifugation and electrodecantation, Properties of natural rubber latex concentrates, Redispersible natural rubber from natural rubber latex.

5
10 %
4
Fundamental Latex Characteristics:

Particle size & distribution, Stability & destabilization of lattices, Concentration, viscosity, concentration relationship, surface, free energy & wetting behavior, zeta- potential, electrical prop. of colloidal systems, thermal measurement of molecules, kinetics of Brownian motion.

5
10 %
5
Gelation Of Natural Latex:

Zinc oxide solubility with pH, Heat gelling systems, Delayed action gelling system using sodium silicofluoride, significance of pH/time gelation cure foaming, frothing time cure, foam, viscosity, delayed action gelling.

5
10 %
6
Latex Compounding Ingredients:

Introduction, Rubber vulcanizing agents, rubber vulcanization accelerators, rubber vulcanization activators, rubber anti-oxidants, fillers and pigments, surface active substances, viscosity-modifiers and macromolecular colloid stabilizers, other latex compounding ingredients.

5
10 %
7
Preparation of Solutions, dispersions and emulsions for Latex Compounding:

General considerations, Preparation of aqueous solutions for addition to latices, Preparation of aqueous dispersions of solid latex compounding ingredients, preparation of oil -in-water emulsions for addition to latices, representation of latex formulations.

5
10 %
8
Latex Processing & Testing Equipments:

Planetary mixer, turbo mixer, Jar mill, Ball mill or pebble mills, Indentation hardness tester for foam, flex resistance tester, Mechanical stability tester, difference between processing of latex and milled rubber, summary of hints for latex compounding and processing.

5
10 %
9
Latex Moulding & Casting:

Outline of latex-moulding and casting processes, latex-moulding processes using plaster molds, latex-moulding processes using metal moulds, other latex-moulding and casting processes, after treatments for latex mouldings, castings and compounding.

5
10 %
10
Latex allergy:

Introduction, causes, remedies, types of latex reactions and allergy, Diagnosis of latex allergy, management of latex allergies etc.

5
10 %
11
Test for Latex:

Viscosity, KOH number test, Mechanical stability test, VFA number, Surface tension, zinc oxide viscosity test, zinc oxide thickening test, kalaxon stability tester , determination of gelling pH, determination of pH, determination of total copper, determination of total iron, determination of total manganese, determination of total nitrogen, determination of total ash etc.

5
10 %