Quick Answer
Hemp is superior for cord making due to its higher fiber tensile strength, durability, and resistance to rot and decay, making it a more reliable choice for outdoor applications.
Natural Fiber Characteristics
When it comes to twisting plant fibers into rope and cord, the properties of the base material play a crucial role in determining its performance. Both cotton and hemp have their unique characteristics, but hemp stands out for its exceptional fiber tensile strength, averaging around 450-500 pounds per square inch (psi). In contrast, cotton fibers typically have a tensile strength of around 150-200 psi.
Fiber Length and Twist Rate
The length of the fibers also affects the quality of the cord. Hemp fibers can range from 3 to 6 feet in length, allowing for a more consistent twist rate. A slower twist rate, typically around 1-2 turns per inch, is recommended for hemp fibers to maximize their strength and durability. This slower twist rate also helps to distribute the stress more evenly along the length of the cord.
Practical Applications and Maintenance
In practical applications, hemp cords are ideal for outdoor use, such as camping, sailing, or search and rescue operations, where durability and resistance to rot and decay are paramount. To maintain the quality of hemp cords, it’s essential to store them in a dry environment and avoid exposing them to excessive moisture or sunlight. Regular inspections and replacement of worn-out sections can help extend the lifespan of hemp cords.
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