Is Tarred Bankline Resistant to UV Damage?

Composition of Tarred Bankline

Tarred bankline is a type of cordage composed of natural or synthetic fibers, typically hemp or nylon, coated with a layer of tar. The tar, derived from pine resin or other plant-based sources, serves as a waterproof and UV-resistant sealant. A typical tar coating can range from 10% to 30% of the total bankline weight.

UV Resistance Mechanisms

The UV resistance of tarred bankline is attributed to several mechanisms. Firstly, the tar coating acts as a physical barrier, preventing UV radiation from penetrating the underlying fibers. Secondly, the tar’s polyaromatic hydrocarbon (PAH) compounds absorb UV radiation, dissipating its energy as heat. This process can be enhanced by adding UV stabilizers to the tar formulation, such as hindered phenols or benzotriazoles. A common concentration range for UV stabilizers is between 0.1% and 2% of the tar weight.

Practical Implications

While tarred bankline offers excellent UV resistance, its performance can be influenced by environmental factors, such as temperature, humidity, and exposure duration. In general, tarred banklines can withstand exposure to direct sunlight for several years without significant degradation. However, prolonged exposure to extreme temperatures or high-humidity environments may compromise its integrity. To maintain optimal performance, it is essential to store tarred bankline in a cool, dry location, away from direct sunlight. Regular inspections for signs of degradation or damage are also crucial to ensure the bankline’s continued reliability.