Additives Master Batches
Additives Master Batches
Usually only a small addition of these additives is required in the polymer to reach the desired effect. Hence, they need to be dispersed very well using a suitable carrier material
Our Additive masterbatches range
- Antistatic masterbatches
- Antioxidant masterbatches
- Nucleating & clarifying agent masterbatches
- Light stabilizer masterbatches
- Slip and anti-block masterbatches
- Foaming agent masterbatches
- Anti microbial agent masterbatches
- Anti sink masterbatches
- Impact modifier masterbatches
i. Antistatic Master Batches
These are designed to prevent a buildup of static electricity in plastics. Polymers by nature have very good insulating properties but these very properties may lead to a number of handling and other problem. Static charge may result in clinging of sheet and film, sticking of stacked polystyrene cups, attracts dust and dirt. Also, a sudden discharge can create sparks that may damage electronic components and can be an explosion hazard.
ii. Antioxidant Master Batches
These are usually organic compounds that slow down or completely stop polymer degradation due to oxidation. Degradation in the form of discoloration, change in viscosity, surface crazing and loss of physical, mechanical and optical properties can be avoided by the use of anti oxidants. These situations usually arise due to exposure of the polymer at elevated temperature during processing or due to long term exposure to the environment. These antioxidants can be classified as primary antioxidants and secondary antioxidants depending on their stabilizing effect in the life span of the polymer.
iii. Nucleating & Clarifying Agent Master Batches
These are usually sorbitol based organic compounds and improve the clarity of semi-crystalline polymers like polypropylene by restructuring of the molecules during the processing stage, thereby affecting only the optical properties.
iv. Light Stabilizer Master Batches
These stabilizers extend the life of polymers by inhibiting degradation caused by various light sources. These can be further divided in to UV Absorbers and UV Stabilizers. Usually a combination of the two gives the best results and better longevity under light exposure.
v. Slip and Anti-Block Master Batches
Also known as release agents these prevent adherence of thin films to metals and to each other usually due to the accumulation of static charge on the surface.
vi. Foaming Agent Master Batches
These are compounds which decompose at elevated temperatures forming gas and other inert components that expand the plastic material giving it a cellular structure. This process offers weight reduction, better acoustical properties, better insulation as well as cost savings. These can be further divided into exothermic foaming agents and endothermic foaming agents. Exothermic foaming agents are usually used for larger parts while endothermic foaming agents can be used for tapes film sheet and removal of sink marks for in molded parts.
vii. Anti Sink Master Batches
These work on the principle of foaming agents. They are very effective in removal of sink marks especially in areas over ribs and give completely flat parts.
viii. Anti Microbial Agent Master Batches
These protect materials against fungal and bacterial attack. Very effective against both - gram positive and gram negative microbes.
ix. Impact Modifier Master Batches
Unmodified polymers viz, PVC, PMMA, PS/SAN are brittle. Even PC, PA or PE will exhibit a brittle to ductile & limited impact strength to get the required impact strength in rigid polymers.
The characteristics are as under:
- The quality of dispersion
- The adhesion to the polymer matrix
- The rubber domain particle size in the matrix
- The rubber glass transition temperature