Natural rubber sheets serve as essential materials in both industrial and civil applications, offering unique physical and chemical properties that make them indispensable across various fields. From industrial equipment to safety protection, their applications are extensive and diverse. But what exactly are the key properties of natural rubber sheets? And what specific needs can they fulfill?
Natural rubber sheets primarily consist of natural rubber (NR), whose molecular chain structure provides the following notable characteristics:
High Elasticity and Flexibility
With an elastic modulus just 1/3000 that of steel and rebound resilience reaching 50%-85%, it can withstand repeated stretching and compression without permanent deformation.
Elongation at break can reach up to 1000%, with only 15% permanent deformation after stretching, making it ideal for cushioning and vibration absorption.
Wear and Tear Resistance
Due to its self-reinforcing molecular chains, natural rubber offers tensile strength of 17-25MPa (uncured) or 25-35MPa (cured), ranking second only to polybutadiene rubber in general-purpose rubbers.
Waterproof and Corrosion Resistance
Non-absorbent properties make it suitable for damp or underwater environments.
Shows resistance to weak acids, alkalis, and hydrofluoric acid (at 10% concentration), though performance against strong acids and ozone is limited.
Insulation and Temperature Tolerance
Non-polar characteristics provide good insulation, though vulcanization additives may reduce this property.
Effective temperature range typically spans -40°C to 80°C, with decomposition at extreme high temperatures (above 200°C) and brittleness in extreme cold.
Machinery and Equipment Protection
Used in manufacturing gaskets, vibration dampeners, and conveyor belts to reduce mechanical vibration and noise while extending equipment lifespan.
Serves as buffer pads and conveyor components in mining equipment to enhance operational safety.
Electrical and Electronics Industry
Functions as insulation material in cables, transformers, and other electrical equipment to prevent current leakage.
Building Waterproofing and Sound Insulation
Applied in roof waterproofing layers and floor soundproofing mats to effectively prevent water penetration and reduce noise transmission between floors.
Road and Transportation Infrastructure
Installed in bridge bearings or rail transit systems to utilize its elasticity for absorbing vehicle impact and extending pavement durability.
Define the Operating Environment
High-temperature applications require heat-resistant modified rubber, while damp environments demand superior waterproof performance.
Match Technical Specifications
Parameters like thickness (1-60mm), hardness (Shore A 70±5), and tensile strength (≥3.0MPa) should be customized based on specific requirements.
Consider Environmental and Cost Factors
For cost reduction, consider blends with synthetic rubbers (like SBR) or recycled rubber, while balancing performance with environmental standards.
Natural rubber sheets have become fundamental materials in industrial and construction sectors due to their high elasticity, wear resistance, and versatility. Although limited in weather resistance and strong acid tolerance, ongoing material modifications and composites continue expanding their applications. Looking ahead, growing environmental demands will further drive sustainable development through synergistic use of natural, recycled, and synthetic rubbers.
Tianjin Qihang Plastic Technology Co., Ltd
12+ Years Expertise in Industrial Rubber Sheet Manufacturing • Global Export Leader • REACH/RoHS Certified
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