Effects of cocoon shell properties and breeding success on the quality of raw silk

Abstract

This research examines how the physical and mechanical traits of cocoon shells influence the final quality of raw silk, with a focus on the role of selective breeding. A comparative study was conducted on two silkworm hybrids, “Xitoy” and “Ipakchi-1xIpakchi-2”, alongside a control group. The evaluation centered on four key shell parameters: firmness, wall thickness, compactness, and pore structure. The outcomes indicate that properly bred cocoons are capable of delivering raw silk that reaches the 4A quality level. Such material is well-suited for demanding applications in the textile field, as well as in aerospace and healthcare industries.