Explore our industrial-grade material handling products, precision manufactured for extreme stress and harsh operating environments.
Industrial Conveyor Engineering Expert
Hebei Boao Rubber Technology Co., Ltd. (Brand: "Jinao") is a premier ISO-certified manufacturing facility encompassing over 30 acres in the Boye County Industrial Zone, Baoding. Founded in 2004, Boao specializes in high-tensile multi-ply conveyor belts, industrial rubber products, and state-of-the-art supporting conveyor accessories.
In heavy-duty bulk material transportation, the 6-ply rubber belt represents a crucial engineering milestone. Designed to bridge the performance gap between lighter fabric belts and steel cord variants, 6-ply conveyor belts offer exceptional load-carrying capabilities. With reinforcing layers engineered from high-grade Polyamide (Nylon - NN) or Polyester-Polyamide (EP) fabric, these belts provide excellent tensile strength and high impact resistance, making them ideal for heavy mining, metallurgy, and port facilities.
As systems scale up, engineers face the challenge of choosing belts that can handle extreme impact loads while maintaining deep troughing angles. A 6-ply fabric construction strikes the perfect balance, ensuring optimal troughability and reliable support for heavy bulk materials.
At Hebei Boao Rubber Technology, we use our state-of-the-art chemical and physical testing labs to ensure every batch of raw materials and finished products meets the highest industry standards. Our 6-ply conveyor belts feature advanced rubber covers designed for specific operating conditions, including extreme heat, sub-zero cold, acidic environments, and flame-retardant mining operations.
Our commitment to E-E-A-T principles is backed by our state-of-the-art laboratory testing facilities, ensuring every product meets international standards before leaving our factory.
We feature an independent chemical analysis room and physics laboratory. This allows us to track every phase of production, from raw material procurement to final product delivery. Our team strictly enforces standard-compliant quality controls across all manufacturing lines.
Our Quality Control team utilizes advanced testing equipment to run aging, elongation, tensile strength, and abrasion resistance tests. Every 6-ply rubber belt is engineered to withstand high dynamic stress and demanding operating cycles.
Our heavy-duty belts are exported worldwide. They are widely used in demanding environments like power stations, major deepwater ports, chemical fertilizer plants, large grain depots, and high-impact metallurgical facilities.
Heavy-duty industrial operations require highly specialized conveyor systems. We engineer targeted solutions designed for reliable performance under extreme physical and environmental stress:
We supply high-safety flame-retardant and anti-static conveyor belts. These belts meet rigorous international safety standards (including DIN and ISO) to minimize fire hazards in underground mining and coal processing.
Our heat-resistant belts are formulated to handle sintering ore, coke, and slag at temperatures up to 300°C. They are engineered to prevent premature cracking and ply separation under intense thermal stress.
Engineered with high abrasion-resistant cover compounds (Grade X, Y, and DIN W), our belts easily withstand the continuous friction and impact of crushing and conveying large, sharp stones.
Our comprehensive line of Jinao Brand products includes general-purpose multi-ply belts (NN, EP, PP carcass), heat-resistant belts, high-angle wavy-edge sidewall belts, cold-resistant options, oil/alkali-resistant options, patterned chevron belts (herringbone and pit designs), and durable rubber waterstop belts. We also manufacture matching supporting equipment like ceramic lag idlers, impact rollers, return roller sets, centering brackets, tensioning frames, and custom steel pulley systems.
Our ISO-certified manufacturing process ensures every conveyor belt complies with strict international performance and environmental safety standards.
We deliver high-tensile belting systems to leading corporations across a wide range of heavy industries.
Supplied high-heat resistant, multi-ply sintering belt systems.
Provided heavy-duty corrosion-resistant belting for nickel smelting lines.
High-tensile wear-resistant belts designed for steep underground mines.
Supplied continuous batch plant feed belts for massive infrastructure works.
Provided low-abrasion, dust-sealed high durability conveyor belts.
Furnished flame-retardant, high-impact rubber transport systems.
Provided continuous limestone transport systems engineered for high impact loads.
Supplied high-temperature fabric belts designed for hot slag processing.
Skip the hassle of sourcing from multiple vendors. We provide complete conveyor support, from initial design and specification to preventative maintenance and on-site repair services:
We provide full support for industrial conveyors, including planned replacement, belt repair, routine safety inspections, and emergency repair options.
We manage regional warehouse inventory, maintain safety stock, perform vulcanized splicing, and provide hot/cold bonding services.
Our services are designed to maximize conveyor runtime, extend belt operating life, and lower overall maintenance costs.
We perform regular tension analysis and alignment checks to prevent structural wear, reduce energy use, and avoid premature belt failure.
A typical 6-ply conveyor belt utilizes advanced reinforcing layers to handle high mechanical stress. The table below outlines standard specifications for our EP and NN fabric carcasses:
| Carcass Type | Tensile Strength (N/mm) | Number of Plies | Cover Rubber (Top/Bottom mm) | Abrasion Loss (DIN 22102) | Key Properties |
|---|---|---|---|---|---|
| EP 1000/6 | 1000 N/mm | 6 Plies | 4.5 / 1.5 to 8.0 / 3.0 | < 90 mm³ to 150 mm³ | Low longitudinal elongation, high moisture resistance, excellent carcass adhesion. |
| EP 1200/6 | 1200 N/mm | 6 Plies | 5.0 / 2.0 to 10.0 / 4.0 | < 120 mm³ | Excellent shock resistance, ideal for primary crushers and heavy quarry operations. |
| NN 1200/6 | 1200 N/mm | 6 Plies | 5.0 / 2.0 to 10.0 / 4.0 | < 100 mm³ | High flexibility, superb troughability, excellent fatigue life under high speeds. |
| NN 1500/6 | 1500 N/mm | 6 Plies | 6.0 / 2.0 to 12.0 / 5.0 | < 90 mm³ | Exceptional impact absorption, designed for high-tonnage mining applications. |
The conveyor belt industry is shifting toward smart monitoring and sustainable materials. Our engineering team is currently developing and testing several key innovations:
Review technical answers to common questions about selecting, maintaining, and using multi-ply conveyor belts.
A 6-ply rubber conveyor belt contains six reinforcing fabric layers (typically Polyester-Polyamide EP or Nylon-Nylon NN) encased in protective rubber covers. This construction provides higher tensile strength, excellent resistance to heavy impacts, and reliable load support. It offers the high capacity needed for demanding industrial applications without requiring the transition to steel-cord systems.
EP belts use polyester fibers in the warp (longitudinal) and nylon in the weft (transverse). This design offers low stretch, excellent resistance to moisture, and high dimensional stability, making them ideal for long-distance conveyors.
NN belts feature nylon fibers in both directions. This construction provides high elasticity, exceptional fatigue life, and superior impact resistance, which is preferred for shorter conveyor runs with high-frequency loading cycles.
Lifespan depends heavily on material type, operating speed, system alignment, and cover rubber quality. In general quarries or cement plants, a high-quality 6-ply belt can last from 3 to over 5 years. Standard preventative maintenance, including correct idler alignment and timely tension adjustments, is key to maximizing belt life.
Yes, provided it is engineered with a heat-resistant cover compound. Our heat-resistant covers are formulated to protect the inner fabric plies from high temperatures. For continuous material temperatures up to 200°C (or spikes up to 300°C), we recommend using EP fabric carcasses paired with EPDM cover compounds to prevent cracking and ply separation.
We highly recommend hot vulcanized splicing for heavy-duty 6-ply conveyor belts. It offers the strongest joint, preserving up to 90% of the belt's original tensile rating. For rapid on-site repairs or temporary installations, cold chemical bonding or heavy-duty mechanical fasteners can also be used.
Complete your material handling system with our specialized conveyor belts and durable structural components.
Boao Rubber