Design and Development of a Portable Sisal Decorticator.

The demand of natural fibres is increasing in the world for industrial uses to make high value products. An enormous potential of sisal fibre is present in Pakistan for making ropes, twines, paper, carpets, cloth and handicrafts, which has not been exploited so far. The aim of this study was to design and develop a small-scale portable sisal decorticator for extracting fibre from sisal leaves. A prototype of sisal decorticator was designed and fabricated at Agricultural and Biological Engineering Institute, National Agricultural Research Centre, Islamabad. The prototype machine was tested for fibre extraction. Results indicated that sisal fibre production capacity of this machine was 15.94 kg h-1 (dry fibre). Average yield of dry sisal fibre was 3.2% of green leaf weight and average fibre length was 1348.9 mm per leaf. Average power required to decorticate sisal leaves was 3.1 kW. Operating cost of sisal decorticator together with a combing machine was Rs. 507.9 h-1. The breakeven point or payback period of this technology was 233 h. Sisal fibre needs to be washed, dried and brushed after decortication process for getting good quality fibre to make domestic products. This technology has a great potential and needs to be commercialised in sisal growing areas of the country. [ABSTRACT FROM AUTHOR]