Glossary: Your Essential Guide to Masterbatch Terms


Additives are substances added to polymers during processing to enhance or modify their properties. Examples include stabilizers, plasticizers, flame retardants, and UV absorbers. Additives can improve performance, processability, and durability.


Agglomeration refers to the process of particles clumping together to form larger aggregates. In polymer processing, agglomeration can impact the dispersion and uniformity of additives or fillers within the polymer matrix.

Calcium Carbonate (CaCO3)

Calcium carbonate is a chemical compound composed of calcium, carbon, and oxygen (CaCO3). It is commonly used as a filler material in the plastics industry to enhance various properties of plastic products, such as reducing costs, improving stiffness, and increasing volume.

Carrier Resin

A carrier resin, in the context of masterbatch or compound production, is the primary polymer that carries and encapsulates additives, pigments, or fillers. It serves as a medium for uniformly dispersing these components within the plastic matrix during the manufacturing process.

Fiber Glass Compound

Fiber glass compound refers to a composite material consisting of plastic (polymer) and glass fibers. This combination results in a reinforced material with increased strength, stiffness, and dimensional stability.

Glass Fibers

Glass fibers are thin strands of glass, typically bundled together, used as a reinforcing material in composite materials. They enhance the strength, stiffness, and other mechanical properties of the composite when combined with a polymer matrix.


Fillers are materials added to plastics to reduce costs and improve specific properties. Examples include calcium carbonate (CaCO3) and talc. Fillers can enhance stiffness, reduce shrinkage, and contribute to other performance attributes.


Masterbatch is a concentrated mixture of pigments, additives, or other functional ingredients encapsulated in a carrier resin. It is a convenient and efficient way to introduce color or enhance the properties of plastics during the manufacturing process. Masterbatch is widely used in the plastic industry to ensure uniform dispersion of additives and achieve consistent results in the final plastic product.


Monomers are small, simple molecules that can join together through chemical reactions to form larger, more complex structures called polymers. The process by which monomers combine to form polymers is known as polymerization. During polymerization, the chemical bonds between monomers are typically covalent bonds, creating a chain-like structure.


Pigments are colored or white powders that impart color to plastics. They are finely ground particles dispersed in a plastic matrix to achieve the desired hue. Pigments contribute to the aesthetic appeal of plastic products.


Plasticizers are additives incorporated into polymers or plastics to improve flexibility, durability, and processability. They work by increasing the mobility of polymer chains, reducing intermolecular forces, and enhancing the material’s ability to bend and stretch. Commonly used in PVC (polyvinyl chloride) formulations, plasticizers make the plastic more pliable and suitable for various applications such as films, cables, and coatings. Popular examples of plasticizers include phthalates, adipates, and citrates.

Plastic matrix

A plastic matrix refers to the polymer component or matrix material in a composite, where reinforcement materials like fibers or fillers are embedded. The plastic matrix holds these materials together, providing structure and determining the overall properties of the composite material.


A polymer is a large molecule composed of repeating structural units called monomers. These monomers are covalently bonded to form long chains, and the process by which this occurs is known as polymerization. Polymers can have a wide range of sizes and structures, and they may be natural or synthetic.

Polymer Carrier Resin

A polymer carrier resin is the base polymer that acts as a carrier for additives, fillers, or pigments in a masterbatch or compound. It provides a matrix for incorporating other materials, contributing to the overall performance and characteristics of the final plastic product.

Polymer Compounding

Polymer compounding involves the process of combining polymer resins with various additives, fillers, or reinforcements to create a compound with specific properties. Compounding aims to tailor the polymer to meet desired performance criteria.

Polymer Matrix

A polymer matrix refers to the continuous phase in a composite material where reinforcement materials, such as fibers or fillers, are embedded. The polymer matrix holds these reinforcements together, providing structure and strength to the composite.


Polymerization is a chemical process in which small molecules, called monomers, join together to form a larger, more complex structure known as a polymer. This reaction involves the bonding of monomer units through covalent bonds, resulting in the formation of a polymer chain. Polymerization can occur through various methods, including addition polymerization and condensation polymerization, and it is a fundamental process in the production of various synthetic polymers used in everyday materials.


Polypropylene (PP) is a thermoplastic polymer widely used in various applications, including packaging, textiles, automotive components, and more. It is known for its durability, chemical resistance, and versatility.

Polyvinyl Chloride (PVC)

Polyvinyl chloride, commonly known as PVC, is a versatile and widely used thermoplastic polymer. It is made from the polymerization of vinyl chloride monomers. PVC is known for its durability, chemical resistance, and versatility, making it suitable for various applications such as pipes, cable insulation, clothing, inflatable structures, and more.

PVC Compounds

PVC compounds refer to formulations of polyvinyl chloride (PVC) resin blended with various additives, plasticizers, and stabilizers. These compounds are versatile and find applications in a wide range of industries, including construction, automotive, and electrical.

Thermoplastic Polymer

A thermoplastic polymer is a type of polymer that can be melted and reshaped multiple times without undergoing significant chemical degradation. This characteristic allows thermoplastics to be easily molded and recycled, making them versatile materials for various applications.

Titanium Dioxide (TiO2)

Titanium dioxide is a white pigment widely used in the plastics industry to provide opacity and brightness to plastic products. It is commonly employed as a white pigment in masterbatches and compounds.

Virgin Polymer

Virgin polymer refers to a polymer that has not undergone any previous processing or use. It is in its pure, original form, free from any additives or contaminants. Virgin polymers are often used in applications where the highest level of purity and quality is required.