With the global rubber industry rapidly advancing toward high performance, green development, and extended service life, products such as tires, industrial conveyor belts, and rubber rollers are facing increasingly stringent performance requirements. Against the backdrop of the widespread adoption of new energy vehicles, improved logistics efficiency, and the growing number of extreme operating conditions, dynamic heat generation, rolling resistance, wear resistance, and thermal management capability of rubber materials have become key indicators of product competitiveness.
In traditional rubber formulations, reinforcing fillers such as carbon black and silica, while providing good mechanical properties, often struggle to achieve a balance among thermal conductivity, low heat build-up, abrasion resistance, and chemical stability. Although carbon black offers excellent reinforcement, issues such as high heat build-up, color limitations, and limited thermal conductivity are gradually becoming performance bottlenecks. Silica, on the other hand, can reduce rolling resistance but requires complex processing and offers relatively lower abrasion resistance.
At the same time, the market demand for functional fillers is growing, requiring fillers not only to provide reinforcement but also to integrate multiple functions—such as high thermal conductivity, low heat build-up, high abrasion resistance, chemical inertness, and high whiteness—to meet the diverse application scenarios of tires, rubber products, and polymer composites.
II. Product Introduction: GreenThinking® NSA25 / NSA26
Developed and manufactured by Shanghai Pawa Flex Materials Co., Ltd., the GreenThinking® NSA25 and NSA26 series are high-purity, high-thermal-conductivity, and high-abrasion-resistant silicon-aluminum alloy functional fillers. Produced through a specialized refining process of silicon-aluminum alloys, this series offers excellent chemical inertness, thermal stability, and physical mechanical properties, making it suitable for rubber products with extremely high dynamic performance requirements.
Key Performance Indicators (Typical Values)
| Parameter | NSA25 | NSA26 |
| Median Particle Size D50 (μm) | 1.54 | 2.16 |
| Particle Size D97 (μm) | 5.28 | 7.54 |
| Moisture Content (%) | 0.18 | 0.16 |
| pH Value | 8.8 | 8.1 |
| Appearance | White Powder | White Powder |
III. Unique Advantages: From Formulation Optimization to Performance Leap
1. Low Heat Build-Up and High Thermal Conductivity Coexist, Achieving Excellent Thermal Management
Under dynamic operating conditions, heat accumulation inside rubber products due to hysteresis effects accelerates aging and reduces service life if not efficiently dissipated. The NSA series, through its unique silicon-aluminum alloy structure, forms an efficient thermal conductivity network within the rubber matrix while significantly reducing compression heat build-up.
In tire applications, it reduces compression heat build-up by 12.5%–21% and rolling resistance by 11.6%–17.5%.
This combination of properties is particularly critical in the tire industry, as it improves fuel economy (or extends electric vehicle range) while extending tire life. As a rubber low heat build up filler, it directly addresses the core thermal challenges in dynamic applications; its role as a high thermal conductivity rubber filler ensures superior heat dissipation, and as an abrasion resistant rubber filler, it provides the durability needed for demanding conditions.
2. High Abrasion Resistance for Demanding Applications
The NSA series features high Mohs hardness, and when used as a reinforcing filler in rubber, it significantly enhances the abrasion resistance of finished products. It is ideal for conveyor belts, rubber wheels, and rubber rollers in high-wear environments, reducing replacement frequency and lowering operating costs. As a true abrasion resistant rubber filler for rubber compound, it delivers consistent performance even under severe wear conditions.
3. Chemical Inertness for System Stability
Unlike traditional metal-based fillers, the NSA series does not undergo chemical reactions or catalyze side reactions when in contact with catalysts or multi-component chemical systems, ensuring system stability. This makes it particularly suitable for complex formulations (such as vulcanization systems and anti-aging systems), avoiding crosslinking interference or performance degradation caused by fillers. Its nature as a chemically stable rubber filler for rubber compound guarantees formulation reliability.
4. High Whiteness for Enhanced Aesthetics and Design Flexibility
The NSA series is a white powder with high whiteness, making it suitable for light-colored and colored rubber products. It improves product appearance consistency and expands application scenarios such as high-end rubber rollers, industrial casters, and transparent or translucent composite materials.
5. Consistent Physical Properties for Industrial Reliability
In industrial production, batch-to-batch consistency is key to ensuring product quality. The NSA series adheres to strict internal control standards for critical parameters such as particle size distribution, moisture content, and pH value, ensuring stable performance in formulations and minimizing process variability.
IV. Application Industries and Typical Scenarios
1. Tire Industry
The NSA series demonstrates significant thermal management advantages in tire formulations, making it suitable for:
- High-performance passenger car tires
- Truck and bus tires
- New energy vehicle (NEV) special purpose tires
By reducing rolling resistance and compression heat build-up, the NSA series helps tires achieve lower energy consumption, longer life, and better handling stability. As a low heat build-up rubber filler for tires, it is specifically engineered to meet the thermal demands of modern tire designs; its performance as a high thermal conductivity rubber filler for rubber enables more efficient heat transfer in the tire structure; and when used as an abrasion resistant rubber filler for rubber compound, it ensures sustained tread life.
2. Industrial Rubber Products
- Conveyor Belts: Enhances abrasion resistance and aging resistance under high-load, long-distance transport
- Rubber Rollers: Improves thermal conductivity, reduces surface temperature rise, and extends service life
- Casters / Rubber Wheels: Maintains low heat build-up and high abrasion resistance under high-frequency rolling conditions
In these applications, the NSA series acts as a high durability rubber filler for rubber compound, delivering long-lasting performance even in continuous use.
3. Polymer Composites
As a chemically inert, high-thermal-conductivity functional filler, the NSA series is also suitable for:
- Thermally conductive adhesives
- Thermal pads
- High-performance sealing materials
V. Market Material Comparison and Positioning
| Filler Type | Thermal Conductivity | Abrasion Resistance | Heat Build-Up Control | Chemical Stability | Color |
| Carbon Black | Low | High | Poor | Good | Black |
| Silica | Low | Medium | Excellent | Good | White |
| Metal Oxides | Medium | Medium | Medium | Medium | Various |
| NSA Series | High | High | Excellent | Excellent | White |
Compared to traditional fillers, the NSA series offers clear advantages in multi-functional integration, making it especially suitable for high-end rubber products requiring a combination of low energy consumption, long service life, and high reliability.VI. R&D and Production Capability
VII. Product Series and Tire Industry Applications
VIII. FAQs
1. What is the main difference between NSA25 and NSA26?
The main difference lies in particle size distribution. NSA25 has a smaller median particle size (1.54 μm), making it suitable for systems requiring higher fineness; NSA26 has a slightly larger particle size (2.16 μm), which in some formulations can provide better dispersion or processing characteristics. Both products offer the same high thermal conductivity, abrasion resistance, and chemical inertness.
2. Is this product suitable for light-colored or colored rubber products?
Yes. The NSA series features high whiteness and can be widely used in light-colored and colored rubber products without affecting product appearance. Its role as a high durability rubber filler for rubber compound remains consistent across all color formulations.
3. In tire formulations, how should the NSA series be combined with traditional fillers?
It is recommended to optimize the formulation based on target performance. The NSA series can be used in combination with fillers such as carbon black and silica to balance reinforcement, thermal conductivity, rolling resistance, and heat build-up control. The specific ratio should be determined through process testing.
4. What are the storage conditions and shelf life of the product?
It is recommended to store the product in a cool, dry, sealed environment at around 25°C. The shelf life is 2 years.
5. Is technical support or formulation optimization service available?
Yes, Shanghai Pawa Flex Materials Co., Ltd. provides professional technical support and formulation optimization services to assist customers in adjusting the application solution according to specific application scenarios. As experienced Rubber additive Manufacturers and Special Rubber chemical Manufacturers, the company ensures that customers receive comprehensive guidance. Being among the leading Rubber additive Manufacturers China and Special Rubber chemical Manufacturers China, they combine local expertise with global standards.
IX. Contact Us
GreenThinking® Series Products
Proudly presented by Shanghai Pawa Flex Materials Co., Ltd.
- Factory Address:
No. 6 Xinqing Road, North Economic Development Zone, Xuanzhou District, Xuancheng City, Anhui Province, 317300, China - Office Address:
Room 1606–1608, Boda Business Building, No. 11 Puhuitang Road, Xuhui District, Shanghai, 200030, China - Tel: +86 21 6487 9251
- Fax: +86 21 5106 2693
- Email: yorichen@sanezen.com
For the latest technical data sheets, samples, or technical support, please feel free to contact us.