Extensive research and development has allowed Gelvenor to produce fabrics designed exclusively for use in hot air balloons. This programme was carried out in conjunction with a major Swiss chemical manufacturer, whose involvement has led to the fabric having enhanced ultra-violet and heat resistant properties. Other innovations include two layers of micro-coatings to ensure that the fabric has extended life and absolute zero-porosity up to 250mm water pressure. The fabric was developed specifically for use in harsh Southern African climatic conditions where high ultra-violet radiation and elevated temperatures are very common. The micro-coatings consist of a combined polyurethane and silicone elastomer emulsion; the silicone elastomer being used because of its ability to increase tear resistance and reduce ultra-violet and heat degradation. Even after exposure to 120°C for 72 hours the coating used will not delaminate, degrade, melt or become sticky.
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