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The Rubber Downstream Market for Calcium Carbonate is Gradually Expanding

Posted: 2023-08-11

The global rubber production in 2020 amounted to approximately 9.865 million tons, with a projected increase to about 11.07 million tons by 2021, indicating a market growth rate of around 12.21%. It is predicted that the global rubber production will reach about 14.189 million tons in 2022, representing an impressive increase of 28.18%. Among these countries, Malaysia and Indonesia exhibit higher growth rates at 6.5% and 2.9%, respectively; while China, Thailand, and India experienced market growth rates of approximately 1.8%, 1.4%, and 1.2% respectively. According to publicly available data, the market size of global rubber products was approximately $62.76 billion in the year of20120 ,demonstrating an increase of around $5.3 billion compared to the previous year with a market growth rate of roughly6 .7%. With the emergence of the "mask" era, it is expected that this figure will grow to about $72.58 billion in 2021 ,and further predictions suggest that the market size for the global rubber products industry will reach approximately $100 billion by2027 ,with an average compound annual growth rate (CAGR)of around 6 .2%.

Rubber is one of the three fillers, including calcium carbonate

The combination of calcium carbonate, carbon black, and silica is extensively utilized as the most established and cost-effective inorganic filler in rubber applications. It effectively enhances the process performance of rubber, reduces the required amount of expensive rubber material, increases product volume, and also offers additional functionalities such as coloring, isolation, and film removal.

Calcium carbonate is incorporated into rubber formulations to enhance product volume and provide a filler effect, thereby reducing the usage of costly rubber and achieving cost reduction. The addition of calcium carbonate enhances tensile strength, wear resistance, and tear strength compared to pure rubber sulfide. Moreover, it significantly reduces vulcanization time in both natural and synthetic rubber while also adjusting consistency. Overall, calcium carbonate serves as an exceptional non-toxic environmental material.
The ultrafine calcium carbonate can be used as a partial substitute for carbon black and white carbon black in the production of automobile tires, such as tire sidewalls, cord adhesives, airtight layer adhesives, inner layer adhesives, buffer adhesives, etc. The application of superfine calcium carbonate in rubber hoses and tapes primarily aims to enhance reinforcement and whiteness while improving the dispersion effect of rubber materials.

The Role of Different Qualities of Calcium Carbonate In Rubber

Coarse Whiting

The primary application of heavy calcium carbonate in the rubber industry is as a filler, while it also functions as a coloring agent, isolating agent, and release agent. Its exceptional mixing and processing performance with rubber results in enhanced material stiffness without any delay in vulcanization. Moreover, its affordability makes it highly suitable for various applications such as heels, soles, floors, hoses, and molded or extruded foam rubber products.

Light Calcium Carbonate

Light calcium carbonate exhibits semi-reinforcing properties and is primarily utilized as a white reinforcing filler in rubber applications. It can be easily dispersed within the compound, enhancing its tensile strength, tear resistance, and wear resistance. The physical characteristics of the compound are marginally superior to those containing heavy calcium carbonate. Light calcium carbonate has extensive usage in rubber products such as conveyor belts, rubber hoses, rubber sheets, rubber fabrics, medical-grade rubbers and footwear.

Nano-Calcium Carbonate

Modified nano calcium carbonate, combined with a coupling agent and other polymer materials for surface composite treatment, is utilized as an additive in rubber products. It effectively meets the requirements of reinforcement, compatibility, and processability. It has the potential to completely replace or partially substitute semi-reinforcing agents such as hard clay and talc, as well as high-ratio reinforcement agents like carbon black and silica. Furthermore, when employed as a dispersion agent, it significantly enhances the blending of ultra-fine particles such as carbon black or silicon dioxide, improves the dispersion of rubber reinforcing agents, reduces the usage of costly additives like silane coupling agent, decreases the amount of required rubber due to its higher filling volume thereby aiding in cost reduction. Moreover, it also reduces vulcanization time and provides superior economic benefits.

Requirements For The Use of Calcium Carbonate In Rubber
Oil absorption value: The rubber industry has higher requirements for the oil absorption value of ultra-fine calcium carbonate. The higher the oil absorption value, the better the infiltration and reinforcement of rubber.

pH value: The pH value of ultra-fine calcium carbonate mainly affects its vulcanization rate. It should generally be controlled at 9.5 ~ 10.5. If the pH value is low, the vulcanization rate slows down, reducing efficiency and increasing energy consumption.

Crystal shape: Because rubber requires very high reinforcement performance, ultra-fine calcium carbonate should have a crystal shape mainly in chain or chain-like form. During processing, these chain segments will intertwine, enhancing system strength.

Particle size: The nano-calcium carbonate used in rubber is generally within a particle size range of 80 ~ 120nm. If particles are too large, they cannot effectively reinforce; if particles are too small, they increase contact area during rubber infiltration which makes dispersion difficult and affects rubber mixing.

Calcium Carbonate Grinding Mill

When selecting a calcium carbonate mill, it is crucial to choose one that aligns with your specific requirements. For instance, in the case of processing rubber with calcium carbonate, the reinforcement provided for rubber becomes stronger as the fineness of the calcium carbonate powder decreases. In such scenarios, Clirik recommends utilizing either the HGM type ultrafine mill or the CLUM type ultrafine vertical mill.

HGM Calcium Carbonate Ultrafine Grinding Mill
Capacity: 0.2-45 t/h
Feed Size: ≤20 mm
Powder Fineness: 80-325 mesh

The superfine mill is a machine utilized in the mining and construction industries for grinding various rocks or minerals into powder. It is commonly employed to grind materials like limestone, quartz, marble, granite, and other stones or ores. During the grinding process, rocks or minerals are fed into a mill where they undergo crushing by a rotating grinding medium (such as steel balls or ceramic beads) within the grinding chamber. Consequently, the rocks or minerals are reduced in size and transformed into fine particles or powders. Ultrafine mills are available in different sizes and configurations ranging from small laboratory mills to large industrial ones. They can employ various grinding mechanisms including ball mills, rod mills, and automills depending on specific applications and desired particle sizes. The grinder produces rock or mineral powder that finds diverse applications across multiple industries. In the construction industry, it serves as raw material for cement production, filler/additive in concrete manufacturing processes, or component for building materials fabrication. Additionally, rock powder finds application in agriculture as well as pharmaceuticals and cosmetics industries.

CLUM Calcium Carbonate Ultrafine Vertical Grinding Mill
Capacity: 1-20 t/h
Feed Size: ＜20 mm
Powder Fineness: 300-3000 mesh

The CLUM series ultrafine vertical roller grinding machine is developed and produced by Shibang Micro Powder Technology Co., Ltd. based on extensive experience in manufacturing ultra-fine powder processing equipment, combined with customer requirements for powder processing. In comparison to traditional mine grinding processing equipment, the CLUM series ultrafine vertical roller grinding machine effectively reduces the likelihood of secondary grinding, minimizing raw material and electricity losses. The entire machine is constructed using highly wear-resistant steel, which helps reduce maintenance costs and expenses associated with part replacement. Through continuous optimization and improvement of each component, the vertical mill exhibits exceptional reliability while reducing downtime. The intelligent processing process of the CLUM series ultra-fine vertical roller mill enables long-term material grinding to enhance revenue.

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The Rubber Downstream Market for Calcium Carbonate is Gradually Expanding

Rubber is one of the three fillers, including calcium carbonate

The Role of Different Qualities of Calcium Carbonate In Rubber

Requirements For The Use of Calcium Carbonate In Rubber

Calcium Carbonate Grinding Mill

HGM Calcium Carbonate Ultrafine Grinding Mill

CLUM Calcium Carbonate Ultrafine Vertical Grinding Mill

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