Talc Powder for Rubber

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In the rubber industry, talc powder is used as a reinforcing filler and processing aid. It is added to both natural and synthetic rubber compounds to enhance their properties such as elasticity, tensile strength, dimensional stability, heat resistance, and mold release. Its inclusion improves the performance, durability, and cost-effectiveness of rubber products across various industries.

Talc Powder Grade and Specification

Product Code

Whiteness by Hunter Lab L* (%)

Particle size: D50, D97 (micron)

Apparent, Tapped Density (g/cc)

SiO2, MgO

Remarks

WIN7D27R (P0151007025H)

92 min.

6±2, 20±3

0.24-0.34,
0.28-0.38

60 min., 30 min.

WIN7D27R (P016A1007025H)

94 min.

10±2, 37±3

0.31-0.41,
0.38-0.48

60 min., 30 min.

WIN7A17R (P0171007025H)

96 min.

12±2, 37±3

0.27-0.37,
0.32-0.42

60 min., 30 min.

WIN7A17R (P0191007025H)

96 min.

6±2, 20±3

0.24-0.34,
0.30-0.40

60 min., 30 min.

WIN7A17R (P0301007030H)

96 min.

4±2, 15±3

0.30-0.40,
0.35-0.45

60 min., 30 min.

WIN7A17R (P0321007030H)

96 min.

4±2, 9±3

0.35-0.45,
0.41-0.51

60 min., 30 min.

WIN7A17R (P0331007030H)

96 min.

3±2, 7±3

0.24-0.34,
0.31-0.41

60 min., 30 min.

Properties and Benefits of Talc Powder in Rubber:

Reinforcing Agent: The lamellar structure of talc improves the mechanical strength of rubber, enhancing tensile strength and resistance to wear and tear, increasing the durability of rubber products.
Thermal Resistance: Talc's thermal stability allows it to withstand high temperatures without degradation, improving the heat resistance of rubber products and making them suitable for high-temperature applications like automotive and industrial uses.
Dimensional Stability: Talc reduces shrinkage and deformation in rubber compounds, ensuring consistency in shape and size, especially for molded rubber parts.
Improved Processability: Talc acts as a lubricant during rubber processing, reducing energy consumption and improving mixing, extrusion, and molding efficiency.
Anti-Stick Properties: Talc prevents rubber from sticking to molds and processing equipment, facilitating easy demolding and reducing production downtime.
Reduced Permeability: Talc decreases the permeability of rubber compounds to gases and moisture, enhancing products like seals, gaskets, and tires by preventing leakage.
Enhanced Flexibility: Talc improves the elasticity and flexibility of rubber, increasing the adaptability and performance of products like hoses, belts, and weather strips.
Abrasion Resistance: Talc enhances the abrasion resistance of rubber compounds, prolonging rubber products' lifespan in demanding environments, such as tires and conveyor belts.
UV and Chemical Resistance: Talc improves resistance to UV rays and certain chemicals, protecting rubber products from degradation and discoloration and extending their service life.
Cost Efficiency: Talc is an economical filler for rubber compounds that reduces material costs while maintaining or enhancing the quality of rubber products.
Surface Finish: Talc improves the smoothness and uniformity of rubber surfaces, enhancing the aesthetic and functional appeal of finished products.
Vibration Dampening: Talc adds mass and flexibility to rubber compounds, improving vibration-dampening properties of products like mounts and bushings.

Finished Rubber Products That Incorporate Talc Powder:

Automotive Products:

Tires
Gaskets and Seals
Hoses and Belts
Door and Window Weatherstrips

Industrial Rubber Products:

Conveyor Belts
Industrial Hoses
Rubber Rollers
Vibration Dampers

Construction and Building Materials:

Roof Membranes
Expansion Joints
Rubber Flooring
Sealing Strips

Consumer Goods:

Rubber Gloves
Footwear (e.g., soles, boots)
Rubber Bands
Sport Equipment (e.g., balls, grips)

Electrical and Electronics:

Cable Insulation
Rubber Grommets
Protective Sleeves

Medical and Healthcare Products:

Surgical Gloves
Medical Tubing
Rubber Stoppers for Pharmaceuticals

Aerospace and Defense Products:

Aircraft Tires
Shock Absorbers
Seals and Gaskets for High-Performance Applications

Raw Materials in the Rubber Supply Chain That Can Incorporate Talc Powder:

Rubber Compounds:

Natural Rubber (NR)
Synthetic Rubber (e.g., Styrene-Butadiene Rubber (SBR), Ethylene Propylene Diene Monomer (EPDM), Nitrile Rubber (NBR), Butadiene Rubber (BR))
Thermoplastic Elastomers (TPEs)

Filler Materials:

Carbon Black
Silica
Calcium Carbonate

Additives:

Processing Aids
Anti-Tack Agents
Vulcanization Agents

Reinforcing Agents:

Fibers and Particulates
Mineral Reinforcements

Plasticizers:

Oils (e.g., aromatic, paraffinic, naphthenic)

Crosslinking Agents:

Sulfur
Peroxides

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