Analysis of Characteristics and Mechanical Properties of Yarn from Sisal Fiber as Raw Material for Making Kre' Alang Sumbawa Woven Fabric

Kre’ Alang is a typical woven fabric of the Sumbawa community. Dependence on commercial yarn is the cause of the low value of Kre’ Alang compared to other regional sogket that have used natural materials. In addition, the rare and expensive types of commercial yarn are a challenge to the sustainability of Kre’Alang. Sisal has the potential to be a raw material for yarn for making Kre' Alang. In recent years, sisal has become an agricultural commodity in Sumbawa. The sisal fiber used in this study came from Labangka. The samples tested included alkalized sisal (S1), dyed alkalized sisal (S1P), weft yarn and hani yarn as a comparison (commercial yarn). Tests carried out included FTIR tests, color tests, physical properties tests, and strength and smoothness tests. The results of characterization using FTIR showed that the alkalinization of sisal fibers had reduced lignin and reduced organic acid levels. They opened the fiber structure so that it could absorb dyes well. Meanwhile, the color test results show that S1 has a bright and shiny color. S1P has a stronger, heavier and more stretchy character. In general, sisal fiber yarn is heavier than synthetic yarn. Furthermore, S1P is used as yarn for making kre' alang. S1P is used as a substitute for weft yarn, considering that it has been alkylated and is more aesthetic or colorful. Evaluation of the quality of Kre' Alang was carried out using a questionnaire regarding consumer perception. Data processing used the IPA-KANO method. The evaluation results showed that the density of the woven fabric should be increased while other attributes were maintained.