การลอกกาวไหมอีรี่ด้วยสารสะลายด่างเพื่อการผลิตเส้นด้ายพิเศษ

Abstract

The objectives of this research were: 1) to study the degumming process of Eri silk using ash solution and soap, 2) to study the physical properties of Eri silk obtained from the degumming process, 3) to study special Eri silk spinning using hand spinning techniques, and 4) to test the physical properties of Eri silk yarns. A completely randomized factorial experiment (Factorial in CRD) was set. The experimental factors were: 1) solution types: ash and soap, 2) pH value: 8, 9, and 10, and 3) time duration: 3, 6, and 9 days. Degumming was carried out by soaking silk cocoons at room temperature, washing, cleaning, and then drying. The fibers gained were then examined for their physical properties. Duncan’s New Multiple Range Test was used to analyze Variance (ANOVA) and difference in means in order to select the best Eri silk fibers. Next, those were spun into novelty yarns using hand spinning techniques. The physical properties of the novelty yarns were then examined in order to analyze suitability for textile use. Results from the analysis of degumming Eri silk cocoons with ash solution showed that degumming with pH 10 for 9 days resulted in the most sericin decay. Additionally, results from the analysis of the physical properties of Eri silk fibers after the degumming with ash solution at pH 10 for 9 days revealed the highest percentage reduction of the fiber’s weight at 67.6 grams, the lowest color intensity (K/S) at 5.59, and the smallest fiber’s size of 10.39 micrometer. These results revealed better physical properties than degumming with soap at the same pH value and time duration. The results also showed a statistically significant difference at a reliability level of 95%. In addition, the results of using spinning Eri silk yarns with hands techniques showed that novelty yarns such as slub yarns were able to be spun into 3 types of complex ply yarns: spiral yarns, knot yarns, and core yarns. Also, the results of Eri silk physical properties showed that slub yarns had a yarn number at 311.27 tex. The number of threads was 10 threads per inch. Strength value per thread number was at 0.09 Newton per tex. Elongation before breaking was 14.49%. The spiral yarns and the knot yarns had the greatest strength per yarn thread size at 0.04 Newton per tex. The spiral yarns had the highest number of threads at 24 per inch. The knot yarns had the greatest properties of toughness with the percentage of elongation before breaking at 19.97 and had the most number of yarns at 1,593.55 tex.