Natural rubber (NR) refers to natural latex collected from rubber trees, processed through procedures such as coagulation and drying to produce elastic solid material (raw rubber). Its primary chemical component is rubber hydrocarbon, typically comprising over 90%, with the remaining components including proteins, fatty acids, sugars, and other organic substances. The microstructure of natural rubber mainly consists of large molecular chain-like structures, with a wide range of molecular weights, but the majority have molecular weights around thirty thousand, resulting in high strength, reaching up to three megapascals. Qihang Rubber uses high-quality natural rubber latex as raw material, incorporates other additives based on a formulation, and through a specialized wet rubber refining process, produces wear-resistant natural rubber sheets with a natural rubber content exceeding 95%. Thanks to improved process design, it preserves the unique long molecular chain structure of natural rubber, retaining its high strength and exceptional wear resistance, making it the best choice for wear-resistant rubber products under wet grinding conditions. Since its introduction to the market, it has earned customers’ trust due to its superior quality compared to peers and highly competitive pricing. It finds extensive use as wear-resistant linings in various industrial equipment, such as pump impellers, hydrocyclones, screen plates, and liners for screening equipment, conveying pipes and bends, valves and sealing components, slurry pumps, sludge pumps, and more. Additionally, it is used in products like floor scrubber squeegees and rubber timing belts.
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Test Standard | Natural(NR)Abrasion Rubber Sheet | Synthetic Rubber sheet | |||||||||||
L36 | NR 38 | NR 40 | NR 60 | CR60 | NBR55 | BUT60 | ||||||||
Material | LATEX | NR 3528 | NR 3534 | NR 35FG | NR 35OZ | NR 4030 | NR 4088 | NR 4542 | NR 6007 | NR 60246 | CR 5510X | N 5547 | I 16009 | |
Color | Red | Red | Red | White | Black | Red | Red | Red | Black | Red | Black | Orange | Black | |
Specific Gravity(g/cm3) | ASTM D397 | 0.96±0.03 | 0.98±0.03 | 0.98±0.03 | 0.98±0.03 | 1.05±0.03 | 1.05±0.05 | 1.05±0.05 | 1.2±0.05 | 1.15±0.05 | 1.10±0.03 | 1.40±0.05 | 1.80±0.05 | 1.58±0.05 |
Hardness(Shore A) | ASTM D2240 | 36±3 | 38±3 | 38±3 | 38±3 | 38±3 | 40±3 | 40±3 | 40±3 | 60±3 | 60±3 | 60±5 | 60±5 | 60±5 |
Tensile Strength (Mpa) | ASTM D412 | 23min | 23min | 23min | 20min | 18min | 18 | 20 | 18 | 18 | 27min | 15min | 12min | 7min |
Elongation at Break (%) | ASTM D412 | 800 | 720 | 720 | 720 | 650min | 650 | 650min | 400 | 450 | 650min | 400 | 680min | 400min |
Tear Stength (N/mm) | ASTM D624 | 40min | 35 | 35 | 45 | 35 | 40 | 40 | 30 | 80 | 101 | 35 | 40 | 40 |
Abrasion resistance @ 5N(mm3) | ASTM D5963 | 103% | 80 | 70 | - | 130 | 125 | 90 | 180 | 120@10N(mm3) | 70 | 90 | ||
Resilience (%) | 80 | 75 | 75 | 65 | 75 | 70 | 70 | 50 | 50 | 55 | ||||
Compression Deformation% (70℃@ 22hr) | ASTM D395 | 20%max | 20%max | 20%max | 25%max | 20%max | 35%max | 35%max | 45%max | 45%max | 25%max | 30%max | 20%max | 30%max |
PAHS(mg/kg) | ≤5 | ≤5 | ≤5 | ≤5 | ≤5 | ≤5 | ≤5 | ≤10 | ≤10 | ≤5 | ≤10 | ≤10 | ≤10 | |
Operating Temperatures(℃) | -40 to +80 | -40 to +80 | -40 to +80 | -40 to +80 | -40 to +80 | -40 to +80 | -40 to +80 | -40 to +80 | -40 to +80 | -40 to +80 | -40 to +120 | -40 to +120 | -40 to +120 |