Carbon black N550 is a soft-grade reinforcing filler developed to enhance the durability and flexibility of rubber compounds and because of its medium structure and surface area, it delivers the perfect balance between elasticity and strength. In fact, many manufacturers rely on it to improve product performance without increasing stiffness.
Although other grades offer higher reinforcement, they also raise hardness. Therefore, this grade becomes essential when flexibility and fatigue resistance are needed together. Moreover, its low heat buildup ensures energy efficiency during processing.
Since carbon black N550 disperses easily, it works well in both extrusion and molding operations. Furthermore, it helps reduce mixing time and improves processing flow.
Because of its moderate structure and specific properties, this grade remains a trusted solution for multiple industrial products. Here are some important technical values:
Iodine Adsorption Number: ~43 mg/g
DBP Absorption: ~121 cc/100g
Structure Level: Medium
Tint Strength: Low
Heat Build-up: Minimal
Elastic Recovery: High
Processing Behavior: Excellent
Although this grade is classified as soft, it offers noticeable reinforcement in finished products. Hence, it supports designs that demand flexibility under mechanical stress.
In rubber compounding, you often need a filler that reinforces without making the product brittle. Carbonblack N550 does exactly that. Since it improves tensile strength and flexibility together, it supports consistent performance over time.
Additionally, it reduces internal heat generation during dynamic use. As a result, products maintain their structure even under frequent movement. This makes it an excellent choice for sidewalls, belts, gaskets, and other rubber components.
Even though it has a lower tint strength than harder grades, it delivers a deep black color. Because of this, it remains visually consistent in finished goods.
Carbon black N550 is used in applications where balance is essential. As such, it appears in:
Passenger car tire sidewalls
Molded rubber parts
Industrial hoses
Footwear components
Gaskets and seals
Shock-absorbing elements
Conveyor belts
General-purpose rubber goods
Since it resists cracking and deformation, it extends the life of rubber products. Therefore, it is preferred in both automotive and general industry sectors.
Basekim supplies high-quality carbonblack N550 for global clients. Whether your need is small-batch testing or bulk commercial use, we provide reliable logistics and full documentation. Additionally, we offer packaging in:
25 kg paper bags
500–1000 kg jumbo bags
Customized solutions based on customer needs
Thanks to our supply chain strength, Basekim guarantees timely delivery and consistent product quality.
Because of this balance, carbon black N550 is often selected when both strength and processing ease are required.
It has higher structure and reinforcement, making it better for semi-flexible products that need more strength.
While it is mainly used for black compounds, it can be modified for limited color-sensitive applications.
Actually, it helps reduce energy use during mixing and curing, which may lower overall costs.