1. Industry Background – The Structural Demand for Performance Upgrades in Rubber Materials
The global rubber industry is accelerating its evolution towards high performance, green sustainability, and extended service life. Tyres, industrial conveyor belts, rubber rollers, and other products are facing increasingly stringent performance requirements. The proliferation of new energy vehicles, the drive for logistics efficiency, and the growing number of extreme operating conditions have made dynamic heat generation, rolling resistance, wear resistance, and thermal management capability the core indicators of product competitiveness.
In traditional rubber formulations, reinforcing fillers such as carbon black and silica, while providing good mechanical properties, exhibit significant shortcomings in achieving a multi dimensional balance of thermal conductivity, low heat build up, wear resistance, and chemical stability. Carbon black offers excellent reinforcement but gradually becomes a performance bottleneck due to high heat generation, colour limitations, and limited thermal conductivity. Silica can reduce rolling resistance but presents processing difficulties and relatively lower wear resistance.
The market demand for functional fillers is growing – fillers are now expected not only to provide reinforcement but also to integrate multiple functions such as high thermal conductivity, low heat generation, high wear resistance, chemical inertness, and high whiteness to meet the diverse application scenarios of tyres, rubber products, and polymer composites.
Single function traditional fillers can no longer meet the multi dimensional performance requirements of the modern rubber industry. Achieving a systematic balance among reinforcement, thermal conductivity, wear resistance, and low heat build up is the technical challenge that material engineers must address. This is precisely why leading Special Rubber chemical Manufacturers China and Special Rubber chemical Suppliers China – along with their global counterparts, Special Rubber chemical Manufacturers and Special Rubber chemical Suppliers – are actively adopting advanced multifunctional filler technologies.
2. Performance Boundaries and Technical Bottlenecks of Conventional Reinforcing Systems
2.1 Inherent Limitations of Carbon Black Systems
Carbon black, as the most widely used rubber reinforcing agent, significantly improves tensile strength, tear strength, and abrasion resistance. However, its limitations are equally prominent:
- High dynamic heat build up – friction and internal dissipation among carbon black particles cause rubber products to generate substantial heat under dynamic service conditions, accelerating thermal ageing and shortening service life.
- Poor thermal conductivity – heat cannot be effectively dissipated, leading to heat accumulation in thick section products, further exacerbating performance degradation.
- Single colour – only black products can be produced, restricting applications in light coloured or coloured rubber goods.
- Relatively high rolling resistance – in tyre applications, this penalises fuel economy and electric vehicle range.
2.2 Processing and Performance Costs of Silica Systems
Silica (precipitated silicon dioxide) offers advantages in reducing rolling resistance and improving wet grip, but at significant costs:
- Difficult processing – strong inter particle interactions cause silica to agglomerate, making mixing difficult and requiring complex silane coupling agent treatments.
- Lower wear resistance – silica filled compounds typically exhibit lower wear resistance compared to carbon black systems.
- Dispersion challenges – nano silica is prone to agglomeration, and poor dispersion leads to localised performance defects.
2.3 The Structural Contradiction between Thermal Conductivity and Reinforcement
The long standing dilemma for the industry is that improving reinforcement performance often sacrifices thermal conductivity efficiency and increases heat generation. Higher carbon black loadings give better reinforcement but also increase dynamic heat build up and rolling resistance; reducing loadings lowers heat generation but also decreases mechanical properties and wear resistance. Finding the optimal balance among reinforcement, thermal conductivity, wear resistance, and low heat build up is the core contradiction that rubber formulation engineers must resolve. This is where a high performance wear resistant filler for rubber compound becomes essential.
3. Technical Solution – GreenThinking® NSA Series Product Matrix and Mechanism of Action
3.1 Product Technical Positioning
The GreenThinking® NSA Series is a high performance silicon aluminium alloy functional filler developed by Xuanluo New Materials (a subsidiary of Sanezen Group). The series includes two product lines: NSA04 nano silicon aluminium alloy for tyre performance enhancement, and NSA25/NSA26 high purity silicon aluminium alloy for thermal conductivity and wear resistance enhancement in general rubber products. The NSA Series products are white powders with high chemical inertness, high thermal stability, and excellent physical mechanical properties, suitable for rubber products with extreme dynamic performance requirements. As a high performance thermal conductive filler supplier for rubber compound, the NSA Series is engineered to meet the most demanding applications.
3.2 NSA04 – The Tyre Performance Revolution with Nano Silicon Aluminium Alloy
Material Composition and Scale
GreenThinking® NSA04 is a nano silicon aluminium alloy (AlSiO₃·H₂O) functional material specifically designed to improve tyre wet grip performance, wear resistance, and rolling resistance. The average particle size is approximately 500 nanometres, providing extremely high specific surface area and excellent dispersibility.
Core Mechanism: Al O Si Bonding Interface Engineering
The mechanism of NSA04 is rooted in its unique physicochemical properties. During rubber mixing, NSA04 works synergistically with silane coupling agents (such as Si75) to form Al O Si chemical bonds. This chemical bonding serves a dual function:
First, penetrating the water film to improve wet grip. The Al O Si bond structure effectively disrupts the water film between the tyre and the road surface, increasing friction on wet pavements. This mechanism addresses the bottleneck of tyre wet braking performance at the molecular level – not by simply increasing surface roughness, but by actively “penetrating” the water film through the polar action of chemical bonds, enabling direct contact between the rubber and the road surface. This makes NSA04 an outstanding silicon aluminum alloy filler wet grip improvement agent and a true filler for improving wet skid resistance in PCR tires.
Second, strengthening interfacial bonding to enhance overall mechanical properties. The Al O Si bond allows NSA04 to form excellent interfacial bonding with the rubber matrix, thereby improving wear resistance, reducing heat generation, and enhancing fatigue resistance.
XPS (X ray photoelectron spectroscopy) analysis confirms that aluminium silicate chemical bonds begin to form when the mixing temperature exceeds 165°C. In SEM (scanning electron microscopy) cross sectional images, the reaction interface between NSA04 and silica can be clearly observed, with NSA04 particles undergoing morphological evolution during mixing, their contours transforming into alumina or aluminium silicate bonded structures. This in situ chemical bonding mechanism is the essential characteristic that distinguishes NSA04 from conventional physically blended fillers.
3.3 NSA25/NSA26 – High Purity Thermal Conductive and Wear Resistant Reinforcing Fillers
Material Composition and Scale
The GreenThinking® NSA25 and NSA26 series are high purity reinforcing fillers prepared from special silicon aluminium alloys through a refining process. The products are white powders with high thermal conductivity, high Mohs hardness, and excellent chemical stability. Even in the presence of catalysts or multi component chemical systems, they remain chemically inert, maintaining structural integrity under extreme temperatures and harsh environments. This makes them an ideal thermal conductive filler for rubber roller application and a reliable thermal management filler for printing rubber roller manufacturing.
Key Physicochemical Parameter Comparison:
| Test Item | Unit | NSA25 | NSA26 |
| Appearance | – | White powder | White powder |
| Median particle size D50 | μm | 1.54 | 2.16 |
| D97 particle size | μm | 5.28 | 7.54 |
| Moisture content | % | 0.18 | 0.16 |
| pH value | – | 8.8 | 8.1 |
NSA25 has a finer particle size (D50 = 1.54 μm), making it suitable for applications requiring higher reinforcement and superior surface quality; NSA26 has a slightly larger particle size (D50 = 2.16 μm), offering better processing flow in certain systems while maintaining reinforcement performance.
Core Functional Characteristics:
- High thermal conductivity – forms an efficient thermal conduction network in the rubber matrix, effectively dissipating heat generated under dynamic service conditions.
- Low heat build up – significantly reduces compression heat generation, achieving a 12.5 21% reduction in tyre applications.
- High wear resistance – high Mohs hardness imparts excellent abrasion resistance to rubber products.
- Chemical inertness – does not participate in chemical reactions or catalyse degradation, ensuring long term stability.
- High whiteness – suitable for light coloured and coloured rubber products.
4. Empirical Data – Performance Validation of the NSA Series
4.1 Experimental Validation of NSA04 in Tyre Tread Compounds
The following data are based on an SSBR/BR blend tyre tread formulation, cured at 160°C.
Curing Characteristics and Processability
| Test Item | Control | NSA04 15 phr | NSA04 12.5 phr |
| ML (dNm) | 1.92 | 1.76 | 1.70 |
| MH (dNm) | 14.05 | 14.59 | 15.06 |
| t90 (min) | 6.66 | 6.27 | 6.04 |
| Mooney ML(1+4)100°C | 59.8 | 55.9 | 55.5 |
Conclusions: NSA04 accelerates cure speed (t90 reduced from 6.66 min to 6.04 min), improving production efficiency; it also lowers Mooney viscosity (from 59.8 to 55.5), improving compound flowability for mixing and extrusion. This demonstrates its role as an effective filler for tire tread compound formulation.
Physical Properties
| Test Item | Control | NSA04 15 phr | NSA04 12.5 phr |
| Hardness (Shore A) | 64.2 | 64.8 | 64.7 |
| Specific gravity | 1.208 | 1.202 | 1.205 |
| Tensile strength (MPa) | 24.8 | 27.9 | 25.3 |
| Elongation at break (%) | 420.6 | 433.4 | 436.0 |
| M100 (MPa) | 3.5 | 3.9 | 4.2 |
| M300 (MPa) | 15.5 | 17.4 | 17.8 |
Conclusions: NSA04 improves tensile strength and elongation at break while maintaining hardness, and significantly increases modulus (M100 from 3.5 MPa to 4.2 MPa, M300 from 15.5 MPa to 17.8 MPa).
DIN Abrasion Test
| Test Item | Control | NSA04 15 phr | NSA04 12.5 phr |
| DIN abrasion loss (cm³) | 0.163 | 0.156 | 0.154 |
Conclusions: NSA04 reduces abrasion loss by approximately 6%, significantly improving wear resistance. This confirms its function as a wear resistant filler for rubber compound and a low rolling resistance filler for tire tread compound.
Heat Ageing Performance (100°C×48h)
| Test Item | Control | NSA04 15 phr | NSA04 12.5 phr |
| Tensile strength after ageing (MPa) | 22.8 | 24.4 | 22.3 |
| Elongation at break after ageing (%) | 291.0 | 303.0 | 298.0 |
| M100 after ageing (MPa) | 5.5 | 5.7 | 5.9 |
Conclusions: NSA04 maintains higher tensile strength and elongation after ageing, demonstrating superior heat ageing resistance compared to the control.
Tear Strength
| Test Item | Control | NSA04 15 phr | NSA04 12.5 phr |
| Tear strength before ageing (kN/m) | 18.1 | 18.0 | 21.9 |
| Tear strength after ageing (kN/m) | 9.1 | 9.8 | 10.3 |
Conclusions: NSA04 improves tear strength both before and after ageing, with particularly significant effects at 12.5 phr loading (from 18.1 to 21.9 kN/m before ageing).
DMA Dynamic Mechanical Properties (10 Hz, strain 0.5%/0.2%, temperature sweep)
| Test Item | Control | NSA04 15 phr | NSA04 12.5 phr |
| tanδ @ 0°C (wet grip indicator) | 0.303 | 0.315 | 0.328 |
| tanδ @ 20°C | 0.172 | 0.170 | 0.166 |
| tanδ @ 60°C (rolling resistance indicator) | 0.106 | 0.097 | 0.095 |
Conclusions: NSA04 effectively improves wet grip (0°C tanδ from 0.303 to 0.328, an 8.3% improvement) and reduces rolling resistance (60°C tanδ from 0.106 to 0.095, a 10.4% reduction). This dual optimisation of “increasing wet grip and reducing rolling resistance” is extremely rare in conventional fillers – where wet grip improvement typically comes at the cost of increased rolling resistance, NSA04 breaks this trade off. This directly addresses the industry’s long standing question of how to reduce rolling resistance and maintain wet grip in tire compound, making NSA04 an outstanding filler for improving wet skid resistance in PCR tires.
Motorcycle Tyre Application Validation
Comparative experiments in motorcycle tyre formulations demonstrate that an optimised formulation with 10 phr NSA04 and 4 phr EG22 achieves the best balance of wet grip, rolling resistance, and wear resistance, with resilience improved by 3 5% and rolling resistance reduced by 9%. This confirms NSA04 as an effective nanometer filler for motorcycle tire wet grip improvement.
4.2 Performance Advantages of NSA25/NSA26 in Rubber Products
Co existence of Low Heat Build up and High Thermal Conductivity
Through their unique silicon aluminium alloy structure, NSA25/NSA26 form an efficient thermal conduction network in the rubber matrix while significantly reducing compression heat build up. In tyre applications, they can reduce compression heat build up by 12.5 21% and reduce rolling resistance by 11.6 17.5%. This performance combination is particularly valuable in the tyre industry – improving fuel economy (or extending electric vehicle range) while extending tyre service life. This makes NSA25/NSA26 a complete solution for balancing wear resistance and heat generation in rubber, effectively helping formulators reduce compression heat build up in thick rubber products formula.
High Wear Resistance for Demanding Conditions
With high Mohs hardness, the NSA Series, as a rubber reinforcing filler, significantly improves product wear resistance. It is particularly suitable for industrial products such as conveyor belts and rubber rollers that have extremely high wear resistance requirements.
Chemical Inertness and Thermal Stability
Even in the presence of catalysts or multi component chemical systems, the NSA Series remains chemically inert, maintaining structural integrity under extreme temperatures and harsh environments. This characteristic gives it unique value in applications requiring long term heat ageing resistance.
5. Application Scenarios and Technical Selection Guide
5.1 NSA04 – Dedicated Solution for Tyre Performance Upgrades
NSA04 is specifically designed for tyre applications and is suitable for various tyre types:
| Application Area | Typical Products | Core Requirements | Recommended Loading |
| Passenger car tyres | PCR tread | Wet grip, low RR, wear resistance | 10 15 phr |
| Commercial vehicle tyres | TBR tread | Wear resistance, low heat build up, long life | 10 20 phr |
| High performance racing tyres | Competition tread | Ultimate wet grip, handling stability | 10 30 phr |
| Motorcycle tyres | Tread | Safe handling, wear resistance | 10 phr (with EG22) |
Addition method: NSA04 is generally added during the first mixing stage, typically together with silane coupling agents and other additives. The recommended dosage is 10 30 phr, adjustable according to actual process and performance requirements.
5.2 NSA25/NSA26 – General Purpose Thermal Conductive and Wear Resistant Enhancement Solutions
NSA25/NSA26 are suitable for rubber products with dual requirements for thermal conductivity and wear resistance:
| Application Area | Typical Products | Core Requirements | Recommended Grade |
| Tyres | Tread, sidewall, shoulder pad | Low heat build up, low RR, wear resistance | NSA25 (finer particle size) |
| Rubber rollers | Industrial rollers, printing rollers | Thermal conductivity, wear resistance, dimensional stability | NSA25/NSA26 |
| Conveyor belts | Mining belts, food grade belts | Wear resistance, heat resistance, long life | NSA26 (larger particle size) |
| Industrial rubber goods | Seals, anti vibration components | Thermal conductivity, low heat build up, ageing resistance | NSA25 |
The main difference between NSA25 and NSA26 is particle size: NSA25 has finer particles (D50 = 1.54 μm), suitable for applications requiring higher reinforcement and surface finish; NSA26 has slightly larger particles (D50 = 2.16 μm), offering potentially better processing flow while maintaining reinforcement.
6. Summary of Technical Value
The GreenThinking® NSA Series silicon aluminium alloy functional fillers deliver value across the following core dimensions:
NSA04 – The “Impossible Triangle” Breaker for Tyre Performance
In traditional tyre formulations, wet grip, rolling resistance, and wear resistance are often difficult to optimise simultaneously – improving wet grip typically increases rolling resistance, and enhancing wear resistance often sacrifices traction. Through Al O Si chemical bonding interface engineering, NSA04 breaks this “impossible triangle”:
- Wet grip improved by 8.3 11.6% (0°C tanδ) – safer wet braking.
- Rolling resistance reduced by 10.4 15.3% (60°C tanδ) – better fuel economy.
- Wear resistance improved by ~6% (DIN abrasion) – longer tyre life.
This answers the critical question of how to reduce rolling resistance and maintain wet grip in tire compound.
NSA25/NSA26 – Multi Functional Thermal Conductive and Wear Resistant Fillers
- Low heat build up: compression heat generation reduced by 12.5 21% – delays thermal ageing, extends product life.
- Low rolling resistance: rolling resistance reduced by 11.6 17.5% – improves energy efficiency.
- High thermal conductivity: forms an efficient thermal conduction network in the rubber matrix – improves thermal management; an ideal thermal conductive filler for rubber roller application and thermal management filler for printing rubber roller manufacturing.
- High wear resistance: high Mohs hardness imparts excellent abrasion resistance – suitable for demanding conditions; a true wear resistant filler for rubber compound.
- Chemical inertness: does not participate in chemical reactions or catalyse degradation – ensures long term stability.
- High whiteness: suitable for light coloured and coloured products – expands design possibilities.
Shared Value
- Processing friendly: NSA04 lowers Mooney viscosity and accelerates cure speed, improving production efficiency.
- Environmentally sustainable: manufacturing process achieves 90% reduction in wastewater discharge and zero emissions of hazardous substances.
- Broad applicability: covers tyres, rubber rollers, conveyor belts, industrial rubber products, and more.
As the rubber industry advances towards high performance, multi functionality, and extended service life, the GreenThinking® NSA Series offers a systematic solution that balances reinforcement, thermal conductivity, wear resistance, low heat build up, and processability – trusted by Special Rubber chemical Manufacturers China, Special Rubber chemical Suppliers China, and Special Rubber chemical Manufacturers and Suppliers worldwide, as well as being the preferred high performance thermal conductive filler supplier for rubber compound and specialty wear resistant filler manufacturer in China.
Technical FAQ
Q1: What is the essential difference between NSA04 and conventional silica in tyre tread compounds?
Brief answer: NSA04 achieves interfacial bonding with the rubber matrix through chemical bonding (Al O Si bonds) , whereas silica relies mainly on physical adsorption and hydrogen bonding. This fundamental difference gives NSA04 the unique advantage of simultaneously improving wet grip and reducing rolling resistance.
In depth explanation:
Silica (precipitated silicon dioxide) is currently the most commonly used low rolling resistance reinforcing filler in tyre tread compounds. Its mechanism relies mainly on silane coupling agents (such as Si75) to establish chemical connections between the silica surface and rubber molecules. However, the strong hydrogen bonding between silica particles causes agglomeration and mixing difficulties.
NSA04’s differentiated advantages are reflected in three aspects:
First, different chemical bonding mechanisms. NSA04 forms Al O Si chemical bonds when the mixing temperature exceeds 165°C, establishing bonding directly between the NSA04 particle surface and rubber molecules. XPS analysis confirms the formation of aluminium silicate chemical bonds, and SEM images clearly show the reaction interface between NSA04 and silica. The strength and stability of this in situ chemical bonding are superior to the silane coupling reaction of silica.
Second, different wet grip improvement mechanisms. The Al O Si bond structure of NSA04 can actively penetrate the water film between the tyre and the road surface – not simply by increasing surface roughness, but by disrupting the continuity of the water film through the polar action of chemical bonds, enabling direct contact between rubber and road. DMA data confirm that NSA04 can increase 0°C tanδ (wet grip indicator) from 0.303 to 0.328, an improvement of 8.3%. This makes NSA04 an outstanding silicon aluminum alloy filler wet grip improvement agent and a true filler for improving wet skid resistance in PCR tires.
Third, decoupling of rolling resistance and wet grip. Conventional fillers often face a trade off between wet grip and rolling resistance – improving wet grip typically increases rolling resistance. NSA04 breaks this trade off: while improving 0°C tanδ, 60°C tanδ (rolling resistance indicator) decreases from 0.106 to 0.095, a 10.4% reduction. This directly addresses how to reduce rolling resistance and maintain wet grip in tire compound.
Selection advice: If the goal is to simultaneously optimise wet road safety and energy efficiency, NSA04 is the superior choice over silica alone; if only rolling resistance reduction is required without pursuing extreme wet grip improvement, silica remains an economical option.
Q2: What is the difference between NSA25 and NSA26, and how do I choose between them?
Brief answer: The core difference is particle size – NSA25 has finer particles (D50 = 1.54 μm), offering better reinforcement and surface finish; NSA26 has slightly larger particles (D50 = 2.16 μm), potentially providing better processing flow while maintaining reinforcement.
In depth explanation:
NSA25 and NSA26 belong to the same high purity silicon aluminium alloy thermal conductive and wear resistant filler series, with consistent chemical composition and basic functionality. The main difference lies in particle size distribution:
| Comparison Dimension | NSA25 | NSA26 |
| Median particle size D50 | 1.54 μm | 2.16 μm |
| D97 particle size | 5.28 μm | 7.54 μm |
| Moisture content | 0.18% | 0.16% |
| pH value | 8.8 | 8.1 |
Advantages of finer particle size (NSA25):
- Larger specific surface area, more contact interfaces with the rubber matrix, more significant reinforcement.
- Finer micro structure on product surfaces, higher surface finish.
- More suitable for thin wall products with strict mechanical and appearance requirements.
Advantages of slightly larger particle size (NSA26):
- Potentially slightly lower mixing energy consumption while maintaining reinforcement.
- Better processing flow in certain high loading systems.
- More suitable for cost sensitive, high volume products where surface quality requirements are not extreme.
Selection advice: For applications with high reinforcement and surface quality requirements (e.g., premium tyre treads, precision rubber rollers), NSA25 is preferred. For high volume products where processing efficiency and cost control are more critical (e.g., general conveyor belts, industrial rubber parts), NSA26 is the more economical choice. The two grades can also be combined in formulations to balance performance and cost.
Our Strength – Decades of Rubber Expertise & Innovation
With five wholly owned manufacturing facilities and nearly three decades of deep rooted experience in China’s rubber industry, we have cultivated unparalleled know how in rubber compounds, silicone rubber compounds, and rubber fillers. This robust technical foundation fuels our relentless pursuit of innovation and continuous R&D, enabling us to develop a series of specialty fillers that precisely address the most demanding customer requirements. We are not merely a manufacturer; we are a comprehensive rubber solution provider, committed to solving your most complex material challenges – from formulation optimisation to production scalability, and from performance enhancement to sustainability goals.
Q3: What should be noted during mixing and processing of the NSA Series? Does the curing system need adjustment?
Brief answer: The NSA Series offers good processing adaptability. NSA04 lowers Mooney viscosity and accelerates cure speed, generally requiring no major adjustment to the curing system; NSA25/NSA26 have high chemical inertness and do not interfere with curing reactions.
In depth explanation:
NSA04 processing characteristics:
Based on tread compound experimental data, NSA04 addition brings the following processing changes:
- Mooney viscosity reduction: from 59.8 to 55.5 (12.5 phr loading), a reduction of approximately 7%. This means improved compound flowability, lower mixing energy consumption, and smoother extrusion and calendering.
- Faster cure speed: t90 reduced from 6.66 min to 6.04 min (12.5 phr loading), a reduction of approximately 9%. This means higher production efficiency and greater throughput per unit time.
- Higher crosslink density: MH increased from 14.05 dNm to 15.06 dNm (12.5 phr loading), indicating a higher degree of crosslinking.
Based on the above data, when using NSA04, major adjustment of the curing system is generally not required. However, when switching from a control formulation to an NSA04 formulation, the following points are recommended:
- Curing temperature can be appropriately reduced or curing time shortened to avoid over cure.
- Accelerator dosage can be fine tuned based on actual cure curves (t90, t10).
- A gradient trial (starting from 10 phr, increasing in 5 phr steps) is recommended to precisely match target performance.
NSA25/NSA26 processing characteristics:
NSA25/NSA26 have high chemical inertness – even in the presence of catalysts or multi component chemical systems, they do not undergo chemical reactions or catalytic degradation. This means they do not interfere with the normal curing reactions, requiring no adjustment to the curing system. Their extremely low moisture content (0.16 0.18%) also avoids the common “blistering due to moisture” problems associated with silica, providing a wider processing window.
General recommendations:
- The NSA Series should be added during the first mixing stage, together with silane coupling agents and other additives.
- Store in a dry, cool, sealed environment at approximately 25°C; shelf life is approximately 2 years.
- Conduct small batch validation before full scale production to determine optimal process parameters.
Q4: How does the NSA Series affect the dynamic performance and thermal ageing life of rubber products?
Brief answer: The NSA Series positively contributes to both reducing dynamic heat build up and improving thermal ageing performance. NSA04 maintains high tensile strength and elongation after 100°C×48h heat ageing; NSA25/NSA26 can reduce compression heat build up by 12.5 21%, fundamentally delaying the thermal ageing process.
In depth explanation:
Heat accumulation under dynamic service conditions is the primary cause of performance degradation and shortened service life in rubber products. The NSA Series addresses this issue from two levels:
First, reducing the heat source – generating less heat.
Through their unique silicon aluminium alloy structure, NSA25/NSA26 form an efficient thermal conduction network in the rubber matrix, significantly reducing compression heat build up. In tyre applications, compression heat build up can be reduced by 12.5 21%. Lower heat generation means reduced thermal motion of rubber molecular chains, slower thermal oxidative ageing reaction rates, and extended product life. This makes NSA25/NSA26 an effective solution for balancing wear resistance and heat generation in rubber and a reliable way to reduce compression heat build up in thick rubber products formula.
Second, improving property retention after thermal ageing.
NSA04 performance data after 100°C×48h heat ageing demonstrate its anti ageing advantages:
| Test Item | Control | NSA04 15 phr | NSA04 12.5 phr |
| Tensile strength after ageing (MPa) | 22.8 | 24.4 | 22.3 |
| Elongation at break after ageing (%) | 291.0 | 303.0 | 298.0 |
| M100 after ageing (MPa) | 5.5 | 5.7 | 5.9 |
NSA04 formulations show superior or equal tensile strength and elongation after ageing compared to the control, indicating that NSA04 does not accelerate thermal ageing but actually improves heat ageing resistance to a certain extent.
Third, tear strength retention before and after ageing.
NSA04 tear strength is superior to the control both before and after ageing. At 12.5 phr loading, tear strength before ageing increased from 18.1 to 21.9 kN/m (21% improvement), and after ageing from 9.1 to 10.3 kN/m (13% improvement). This means that during long term service, NSA04 filled products better resist crack propagation, extending service life.
Conclusions: For rubber products that must serve long term under high temperature, dynamic conditions (such as tyres, conveyor belts, rubber rollers), the NSA Series not only provides immediate performance gains but also significantly extends effective service life through reduced heat generation and improved ageing resistance.
Technical Support & Contact
For detailed experimental data, formulation recommendations, or customised solutions for specific rubber systems (SSBR, BR, NR, EPDM, etc.) or particular service conditions, please contact the technical team at Xuanluo New Materials (Sanezen Group).
Email: yorichen@sanezen.com
Web: www.sanezenrubber.com
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