Overview
Rubber cord is a versatile elastomeric product made from natural or synthetic rubber compounds. It is manufactured through extrusion processes, yielding continuous lengths of flexible, round-profile material. The cord exhibits exceptional elasticity and durability, making it indispensable in industrial and manufacturing applications. Depending on the formulation, rubber cords may incorporate additives for UV resistance, flame retardancy, or enhanced mechanical properties. Common base materials include EPDM, nitrile rubber (NBR), and silicone, each selected for specific performance characteristics in different environments.
Physical and Chemical Properties
Rubber cord typically demonstrates 100-300% elongation capacity with excellent recovery properties. The material's tensile strength ranges from 10-20 MPa, while hardness usually falls between 40-80 Shore A. These properties can be precisely tuned through compound formulation and vulcanization processes. Chemically, rubber cords resist water, mild acids, and alkalis but may degrade when exposed to oils, solvents, or ozone unless specially formulated. Temperature resistance varies by material type, with standard compounds performing between -40°C to +100°C, while specialty formulations can withstand extremes from -60°C to +300°C.
Main Applications
In industrial settings, rubber cords serve as sealing elements in doors, windows, and electrical enclosures due to their compression set resistance. The automotive industry utilizes them for vibration damping in engine compartments and as sealants in vehicle assembly. Electrical applications include insulation for wiring harnesses and anti-vibration mounts for sensitive equipment. In consumer products, rubber cords find use in sporting goods, medical devices, and household appliances where flexible, durable components are required.
Safety and Storage
Proper storage involves keeping rubber cords coiled without kinks in low-humidity environments below 25°C. Exposure to direct sunlight should be avoided as UV radiation can cause surface cracking over time. Ozone-generating equipment should be kept away from storage areas. When cutting or processing rubber cords, proper ventilation is recommended to avoid inhalation of particulate matter. Food-grade applications require specific FDA-compliant formulations, while medical uses demand USP Class VI or similar certified materials.
B2B Procurement Guide
Industrial buyers should specify required diameters (typically 2mm-20mm), hardness values, and color requirements. For critical applications, request material certifications and batch testing reports. Minimum order quantities often apply, with bulk purchases (100+ meters) attracting significant discounts. Lead times vary from 2-6 weeks for standard products, while custom formulations may require 8-12 weeks for development and production. Consider supplier capabilities for secondary operations like cutting, splicing, or custom packaging when evaluating vendors.
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