Rubber-Grade Talc for Rubber & Elastomer Compounds

RUBBER GRADE TALC

Talc powders developed for rubber compounds where dependable processing, dimensional behaviour and consistent mineral characteristics matter.

Automotive Rubber · Industrial Compounds · Seals & Moulded Goods

SEM image showing the lamellar morphology of rubber-grade talc

Representative mineral morphology · SEM

01

LAMELLAR MINERAL CHARACTER

Plate-like talc morphology

02

CONTROLLED PARTICLE PROFILE

Grade-specific particle characteristics

03

APPLICATION-LED SELECTION

Elastomer · loading · process

04

DOCUMENTED QUALITY

PIS · TDS · SDS · COA

THE BMM APPROACH

More than mineral loading. Performance in the compound.

A rubber-grade talc is not defined by fineness alone. Mineral character, lamellarity, particle-size distribution and dispersion behaviour all influence the result.

We begin with the elastomer system and the compounder’s target. This helps align source selection and processing with mixing, dimensional, surface and production requirements.

RUBBER APPLICATIONS

Start with the compound. Refine by specification.

Share where the talc enters your system and what the finished rubber product needs to achieve.

01
AUTOMOTIVE RUBBER

Moulded components

Talc grades considered for rubber components where processing behaviour, dimensional control and repeatability matter.

Evaluate BM S2 →
02
INDUSTRIAL COMPOUNDS

Compound consistency

Controlled mineral and particle characteristics provide a dependable starting point for industrial rubber formulations.

Discuss your compound →
03
SEALS & TECHNICAL GOODS

Application-led selection

Candidate grades are shortlisted around the elastomer, loading, process and the finished product requirement.

Evaluate BM S2 →

RUBBER GRADE

One focused grade for dependable compound performance

BM S2 is Bharat Mines’ dedicated rubber-grade talc, developed for consistent incorporation and functional mineral performance across selected rubber and elastomer compounds. Grade suitability should be confirmed against the customer’s formulation, processing conditions and finished-product requirements.

GRADE SELECTION

Is BM S2 suitable for your compound?

BM S2 can be considered where a controlled talc grade is required for general-purpose mineral filling, consistent processing and uniform finished-product characteristics. Suitability depends on the elastomer system, loading level, processing conditions and target properties.

Swipe horizontally to view the complete selection guidance.

Evaluation Area What to Consider
Elastomer System Confirm compatibility with the applicable natural or synthetic rubber formulation and other compound ingredients.
Functional Requirement Assess whether the formulation requires mineral filling, compound body, dimensional stability, processing consistency or surface uniformity.
Loading & Processing Evaluate the proposed dosage under actual mixing, extrusion, calendering or moulding conditions.
Finished Properties Validate hardness, modulus, tensile strength, elongation, compression set, surface finish and other application-specific requirements.

BM S2 should be evaluated through laboratory or production-scale compound trials. Final dosage and suitability remain dependent on the complete formulation, processing conditions and required finished-product performance.

PERFORMANCE FRAMEWORK

Choose the grade around what the compound must do.

The correct starting point depends on the complete formulation, loading, process and required balance of properties.

01

Processing consistency

Controlled sourcing and classification can support repeatable incorporation and compound preparation.

02

Dimensional control

Grade selection considers shrinkage, stability and the dimensional targets of the finished rubber part.

03

Modulus & dimensional contribution

In an appropriately formulated compound, talc may contribute to stiffness, hardness and dimensional behaviour. Final performance depends on elastomer type, loading, dispersion and the complete formulation.

04

Surface uniformity

Particle profile and dispersion can influence the surface consistency of moulded and extruded rubber products.

Final compound performance depends on the complete formulation and process. Grade selection should be confirmed by customer evaluation.

PARTICLE PROFILE

Grade-specific particle control for repeatable compound evaluation.

Particle-size distribution of BM S2 rubber-grade talc

Nominal mesh alone does not fully define a rubber-grade talc. Particle-size distribution, mineral morphology and dispersion behaviour provide a more useful basis for evaluating incorporation and compound performance.

Representative PSD Results
Parameter
Result
Definition
D10
1-2 µm
10% of the sample mass is finer than this diameter.
D50
4-5 µm
Median particle diameter by mass.
D90
10-12 µm
90% of the sample mass is finer than this diameter.

SediGraph III particle-size analysis using X-ray monitored gravity sedimentation and Stokes’ law calculation.

The particle-size curve and values shown are representative results from a talc sample measured by SediGraph. They are not a contractual product specification; values may vary by product and batch and may not be directly comparable with results obtained using other particle-size measurement methods.

Plate-like structure. A controlled starting point.

Talc’s layered mineral structure produces plate-like particles. In a suitable rubber formulation, morphology and particle profile can influence incorporation, reinforcement, dimensional behaviour and surface character.

Mineralogy alone does not determine performance. Elastomer compatibility, loading, dispersion, additives and processing must be considered together.

Particle population at lower magnification

Plate-like mineral morphology at higher magnification

SOURCE TO SPECIFICATION

Uttarakhand / INDIA

Consistency begins before micronisation.

Application First

Share the elastomer, loading, process, present grade and the performance result you need.

Mineral Character

We consider mineral character, particle-size distribution, chemical profile, moisture and raw-material consistency—not mesh alone.

Particle Engineering

Micronisation and classification are aligned with dispersion and processing requirements.

Compound Evaluation

Shortlisted grades should be validated in the customer’s complete formulation before commercial adoption.

TECHNICAL & COMMERCIAL SUPPORT

From shortlist
to supply.

Share your compound and specification. Our team can support grade discussion, sample evaluation, documentation and supply planning.

01

Grade discussion

Review the elastomer, loading, process, present grade and target properties.

02

Samples & evaluation

Shortlist candidate grades for customer-side compound and performance trials.

03

Documentation

Product specifications, TDS, SDS and batch-specific COA support.

04

Supply planning

Suitable packaging with domestic dispatch and export coordination support.

COMMON QUESTIONS

Before you request a grade.

START A TECHNICAL CONVERSATION

Share your elastomer, loading level, process, target properties, approximate requirement and destination.

What should your rubber compound achieve?