Cover compounds

Protect the carcass from the real damage mechanism.

Cover rubber is common across multiple belt constructions. Select it separately for abrasion, cut and gouge, impact, fire safety, heat, cold, oil, chemicals or rolling resistance.

Compound selection

AS classes where they apply. Special properties where they do not.

AS-N, AS-M and AS-A are shown with the minimum physical-property requirements of AS 1332. FRAS is split between K Grade for general-purpose or aboveground duties and AS Grade S under AS 4606 for underground coal. Oil and chemical resistance are treated separately.

General Purpose — AS-N

A balanced general-purpose cover for moderate abrasion and impact conditions.

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Cut, Gouge & Impact — AS-M

A high-strength general-purpose cover for demanding impact, cutting and abrasive service.

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Severe Abrasion — AS-A

A specialised abrasion-resistant class for applications dominated by sliding wear.

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General-Purpose FRAS — K Grade

Flame-resistant and antistatic belting for aboveground and general industrial applications.

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Underground Coal FRAS — AS Grade S

Fire-resistant and antistatic belt systems for Australian underground coal-mining applications.

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Heat & High-Temperature Covers

Special-property compounds selected for hot materials and the actual thermal duty cycle.

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Cold-Resistant Covers

Special-property compounds formulated to retain flexibility and integrity at low ambient temperatures.

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Oil-Resistant Covers

Specialised compounds selected to resist swelling and loss of properties from mineral, animal or vegetable oils.

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Chemical-Resistant Covers

Compounds selected for defined acids, alkalis, salts, fertilisers and other corrosive materials.

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Energy-Efficient Low Rolling Resistance Covers

Pulley-side compounds characterised for lower indentation losses on long, high-capacity and energy-sensitive conveyors.

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AS 1332 cover classes

Published minimum physical properties.

Standard requirements—not proprietary Double Arrow results.

GradePrimary functionTensileElongationAbrasion loss

AS-NGeneral purpose≥ 17 MPa≥ 400%≤ 200 mm³

AS-MDemanding general purpose≥ 24 MPa≥ 450%≤ 125 mm³

AS-AAbrasion resistant≥ 17 MPa≥ 400%≤ 70 mm³

A lower abrasion-loss figure indicates better resistance in the laboratory test. It does not by itself predict cut, gouge, impact, tear or service life.

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