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Natural fibers have emerged as an important component in the development of composite materials because of their mechanical properties. The properties are highly influenced by environmental conditions and processing techniques. This variability makes their usability in reinforcement unpredictable. There are satisfactory attempts to quantify the variation of the properties with environmental conditions. However, the quantification of how the properties vary with processing methods is unsatisfactory. This study, therefore, investigated and quantified the effects of processing variables on the properties of sisal fibers using a raspador. The raspador was designed, fabricated, and utilized in processing sisal fibers. Processing variables such as gap size, number of extraction and brushing elements, and drum speed were investigated. The mechanical properties were determined based on ASTM C1557 standard. High correlation coefficients were found between fiber properties and the processing variables. The brushing process, mostly ignored in many cases, improved the properties of the sisal fibers.

An investigation of the effects of extraction and brushing variables on the properties of hedge sisal fibers using a raspador