Talc powder masterbatch is a plastic-modifying filler made primarily from talc powder, formed into granules by mixing it with a carrier resin or polymer along with relevant modifying agents. It appears as grayish-white cylindrical particles with a uniform color.
By enhancing the processing performance and dispersibility of talc powder, it is widely used in fields such as plastics, building materials, chemicals, rubber, coatings, and papermaking. It can improve the toughness, strength, heat resistance, anti-aging properties, and high-temperature creep resistance of filler materials, ultimately boosting product quality and extending their service life.

Characteristics and Advantages
Talc is a hydrated silicate mineral with a layered structure. Its chemical formula is Mg₃(Si₄O₁₀)(OH)₂. Chemically, it consists of 31.8% MgO, 63.37% SiO₂, and 4.7% H₂O, often containing trace amounts of elements such as Fe and Al. Talc has a density of 2.7 to 2.8 g/cm³ and is the softest among mineral fillers, with a Mohs hardness of 1, giving it a smooth, slippery feel. It occurs in colors ranging from white and gray-green to milky white, pale pink, light blue, and light gray, exhibiting a pearly or greasy luster. When heated between 380°C and 500°C, talc loses its associated water; above 800°C, it also releases its crystalline water. In water, talc is slightly alkaline, with a pH value ranging from 9.0 to 9.5.
Talc has a layered structure, with adjacent layers held together by weak van der Waals forces. Under external force, these neighboring layers can easily slip past one another or even separate entirely. As a result, the basic shape of talc particles is typically flaky or鳞片状 (flake-like).
The flaky structure of talc powder significantly enhances certain properties of plastic filled with talc, leading some to regard it as an reinforcing filler. First, talc can improve the stiffness of the filled material and enhance its creep resistance at high temperatures. When talc particles align along the flow direction of the material during processing—following the principle of least resistance—their arrangement naturally forms a predominantly flaky pattern, with smaller flakes connecting to create larger ones. This alignment effectively boosts the material’s stiffness in specific directions. Second, talc markedly improves the heat resistance of the filled material. The heat deflection temperature, used to measure a material’s thermal performance, refers to the temperature at which a test specimen begins to bend under load to a specified degree. Thanks to its flaky structure, talc can elevate the heat deflection temperature of the material when applied in particular orientations.
Among silicon-containing fillers, talc powder is the most affordable and can help reduce costs.

Main applications: PP, EP, PO, PS, ABS, and related industries
1. Application in polyethylene blown films:
In addition to the significant improvements in the aforementioned properties, when ultra-fine talc powder (1250 mesh and 2500 mesh) masterbatch is used to reinforce injection-grade high-density polyethylene composites, the tensile strength of the material increases—reaching its peak at a 10% addition level—while maintaining nearly the original strength even when the filler content rises to 30%. Meanwhile, the impact resistance shows a slight enhancement. For polyethylene blow-molded films, incorporating ultra-fine talc powder masterbatch proves superior to other fillers, offering excellent moldability and outstanding processability. Moreover, these films can reduce oxygen permeability by up to 80%, making them particularly ideal for packaging oil-containing foods such as peanuts, broad beans, and other products—ensuring long-term freshness without oil seepage or spoilage. Additionally, the films significantly cut water vapor transmission by 70%, providing exceptional moisture-proof performance. As a result, they are perfectly suited for use as underground geotextiles designed to prevent moisture intrusion, as well as for packaging delicate foods like ham, sausages, cheese, and other perishable items.
2. Applications in ABS resin:
Ultra-fine talc masterbatch, manufactured using specialized methods, imparts excellent dispersibility and uniformity when added to plastics. ABS resin is an amorphous polymer that exhibits outstanding molding and processing characteristics comparable to polystyrene. It boasts superior impact resistance, excellent low-temperature performance, high tensile strength, and remarkable creep resistance—capable of withstanding a load of 7 MPa without dimensional changes. As a result, it’s widely used in injection molding processes to produce housings for various appliances, including instruments, televisions, cassette recorders, and mobile phones. Beyond these applications, ABS also finds extensive use in other industries, such as textile machinery, electrical components, automotive parts, and even aircraft components. However, current performance levels of ABS are not yet fully satisfactory, prompting extensive research into its modification. A significant amount of literature has been published on this topic. For instance, ABS blended with PVC can be used to create durable, high-strength, and highly resilient automotive dashboard thermoformed sheets, as well as imitation leather surfaces for luggage and bags. These blends not only maintain the integrity of their surface patterns over time but also significantly enhance both impact resistance and tear strength. When filled with ultra-fine calcium carbonate or ultra-fine talc, the blend’s notch impact toughness and tear resistance are markedly improved—adding 5% to 15% ultra-large calcium carbonate, for example, can boost notch impact strength by 2 to 4 times. Moreover, since ABS is an amorphous polymer with exceptional capacity to accommodate substantial amounts of filler, incorporating ultra-fine talc masterbatch not only enhances the material’s inherent properties but also helps reduce production costs effectively.
3. Application in polystyrene resin:
Unmodified general-purpose polystyrene is an amorphous polymer that is hard and brittle. However, it exhibits excellent electrical properties, outstanding aging resistance, and high dimensional stability. Its drawbacks include high brittleness and sensitivity to environmental stress cracking. Adding ultra-fine talc masterbatch, on the other hand, can enhance impact toughness, improve rheological behavior, significantly boost flexural modulus, and even increase tensile yield strength. For instance, when 40% ultra-fine talc masterbatch is added, the flexural modulus rises from 23,800 kg/cm² to 58,800 kg/cm², while the tensile strength improves from 336 kg/cm² to 385 kg/cm².
4. Applications in Polypropylene
Polypropylene (PP) is a polymer produced by the addition polymerization of propylene monomers in the presence of a catalyst. Thanks to its outstanding mechanical properties, non-toxicity, heat resistance, chemical durability, and ease of processing—combined with abundant and cost-effective raw material sources—PP has become widely used across various industries, emerging as the fastest-growing among the five major general-purpose synthetic resins. However, PP is a partially crystalline resin, and under typical processing conditions, its crystallization process tends to be relatively slow, often leading to the formation of large spherulites. These spherulites significantly hinder light transmission throughout the final product, resulting in poor transparency and glossiness, thereby diminishing the aesthetic appeal of the material. As a result, PP's applications in areas such as packaging, medical devices, and household items remain somewhat limited. On the other hand, after undergoing specialized transparency-enhancing modifications, PP not only retains its original exceptional performance but also achieves transparency and gloss levels that rival those of other renowned transparent materials like PC, PS, and PET. Notably, PP boasts a notably high heat deflection temperature, making it particularly well-suited for applications where high transparency is critical yet the product must withstand elevated temperatures or undergo sterilization processes—such as transparent beverage cups, microwave-safe cookware, baby bottles, and medical syringes. As a result, transparent PP has demonstrated even broader market potential compared to other transparent materials, driving rapid growth both domestically and internationally.