HUAYE-CRL-15 Ceramic Rubber Composite Pulley Lagging
CMAC-certified ceramic rubber composite pulley lagging for coal mine belt conveyors. Alumina ceramic tiles embedded in a tough rubber matrix deliver superior wear resistance, flame retardancy, and antistatic performance. The back face carries a factory-applied CN bonding layer — buffing-free, cold-bonded directly with HUAYE-818.
- MT/T 962-2019 Certified — All 11 Test Items Passed
- CMAC Product Safety Certified (No. CMAC06250218)
- CN Bonding Layer — Buffing-Free, Cold-Bonded with HUAYE-818
- Standard Width 500mm, Custom Length to Pulley Circumference
Why Choose Our Ceramic Rubber Pulley Lagging?
Built for Coal Mine Conveyor Pulley Protection
HUAYE-CRL-15 combines high-hardness alumina ceramic tiles with a tough rubber matrix to deliver a lagging surface that resists abrasion, maintains traction, and meets the strict flame-retardant and antistatic requirements of underground coal mining operations.
Where plain rubber lagging wears quickly under continuous belt friction and material impact, the ceramic tile surface of HUAYE-CRL-15 maintains its profile and grip significantly longer — reducing lagging replacement frequency and associated conveyor downtime. The back face comes with a factory-applied CN bonding layer, so it’s buffing-free — no grinding of the lagging’s back face is needed before installation: clean, degrease, apply cold-bond adhesive, and bond.
Application Environments
Designed and certified for underground coal mine belt conveyors, HUAYE-CRL-15 is equally suited to surface mining, metallurgy, port terminals, and cement plant conveyors where flame retardancy and antistatic performance are required.
Technical Specifications
Source: Inspection Report No. 2024ZY-223 — Xuzhou Coal Industry Labour Protection Testing Centre
| Test Item | Requirement | Test Result |
|---|---|---|
| Tensile Strength | ≥15.0 MPa | 18.9 MPa ✓ |
| Elongation at Break | ≥250% | 358% ✓ |
| Hardness | 60–75 SHA | 65 SHA ✓ |
| Abrasion Loss | ≤160 mm³ | 116 mm³ ✓ |
| Tensile Strength After Ageing (70°C × 168h) | −25% to +25% | −9% ✓ |
| Elongation After Ageing (70°C × 168h) | −25% to +25% | −11% ✓ |
| Peel Strength (lagging to metal) | ≥8.0 kN/m | 12.1 kN/m ✓ |
| Appearance | No cracks, blistering, missing rubber | Pass ✓ |
| Alcohol Spray Lamp Flame Test | Avg ≤3s flaming; avg ≤10s non-flaming | 1.8s flaming; 0s non-flaming ✓ |
| Alcohol Lamp Flame Test | Avg ≤6s flaming; avg ≤20s non-flaming | 1.8s flaming; 0s non-flaming ✓ |
| Antistatic — Surface Resistance (top & bottom) | ≤3×10⁸ Ω | 1.2×10⁴ / 1.6×10⁴ Ω ✓ |
Dimensions & Product Specifications
| Model | HUAYE-CRL-15 |
|---|---|
| Thickness | 15 mm |
| Width | 500 mm (standard) — custom widths available to suit pulley face width |
| Length | Custom — cut to order (specify pulley circumference) |
| Ceramic Content | Al₂O₃ (alumina) composite |
| Bonding Layer | CN bonding layer — factory-applied on back face, buffing-free |
| Installation Method | Cold bond — compatible with HUAYE-818 cold-bond adhesive |
| Colour | Black |
| Application | Drive pulleys and non-drive pulleys |
| Standard | MT/T 962-2019 |
Certifications
CMAC Product Safety Certificate
Coal Mine Product Safety Certificate issued by the National Mining Product Safety Mark Centre.
Certificate No. CMAC06250218
Valid: 2025-02-08 to 2030-02-07
MT/T 962-2019 — All 11 Items Passed
Chinese mining industry standard for conveyor pulley lagging materials. All test items passed per Inspection Report No. 2024ZY-223.
Testing body: Xuzhou Coal Industry Labour Protection Testing Centre
ISO 9001:2015 Quality Management
Quality management system certification covering the manufacturing processes for this product line.
Certificate No. 47425Q0607R0S
Valid: 2025-03-13 to 2028-03-12
Cold Bond Installation
The back face of HUAYE-CRL-15 carries a factory-applied CN bonding layer, so it’s buffing-free on that side — no grinding of the lagging back face is needed before bonding.
On the pulley side, the shell surface should be ground to bare, sound metal before adhesive application — sandblasting is not required for this step.
We recommend HUAYE-818 cold-bond adhesive for installation, which is compatible with the CN bonding layer and has been tested for use in coal mine fire- and explosion-proof environments.
When ordering, specify your pulley circumference and face width — sheets are cut to order to minimise waste and ensure a clean joint.
Installation Notes
Grind the pulley shell surface to bare, sound metal before adhesive application — sandblasting is not required. The surface must also be clean, dry, and free of oil and grease; contamination will reduce bond strength.
The CN bonding layer on the lagging back face is factory-applied and buffing-free — apply cold-bond adhesive (HUAYE-818 recommended) directly to the CN layer and the prepared pulley shell.
Specify pulley circumference when ordering — sheets are cut to length to suit your pulley diameter.
Allow full adhesive cure time before returning the pulley to full operational load.
Frequently Asked Questions
Is HUAYE-CRL-15 suitable for non-mining applications?
Yes. While certified to MT/T 962-2019 for coal mine conveyor pulleys, HUAYE-CRL-15 is equally suitable for metallurgy, port terminals, and cement plants where wear resistance and flame retardancy are required. The certification provides assurance of performance beyond the mining sector.
What adhesive is recommended for installation?
We recommend HUAYE-818 cold-bond adhesive, which is compatible with the CN bonding layer and is certified for use in coal mine fire- and explosion-proof environments. The CN layer on the back face is factory-applied and buffing-free, so no grinding is needed on that side before adhesive application.
Do I need to sandblast the pulley before installing HUAYE-CRL-15?
No. The pulley shell surface should be ground to bare, sound metal and kept clean, dry, and free of oil or grease before bonding — sandblasting is not required for this installation.
Can I get the test report before ordering?
Yes. Inspection Report No. 2024ZY-223 from Xuzhou Coal Industry Labour Protection Testing Centre is available on request. Contact us via WhatsApp or the enquiry form.
How do I specify the correct sheet size?
Send us your pulley face width and pulley shell diameter — we will calculate the sheet length required and confirm availability. Standard width is 500mm; sheets are cut to order to minimise waste.
What does the CMAC certificate cover?
The CMAC Product Safety Certificate (No. CMAC06250218, valid to February 2030) is issued by the National Mining Product Safety Mark Centre and confirms the product meets the safety requirements for use in coal mine environments. It covers flame retardancy and antistatic performance in addition to mechanical properties.
What is the antistatic performance of HUAYE-CRL-15?
Surface resistance measured at 1.2×10⁴ Ω (top face) and 1.6×10⁴ Ω (bottom face) — well below the MT/T 962-2019 limit of 3×10⁸ Ω. This ensures the lagging does not accumulate static charge in underground mining environments.