Fibers Having Fine Concave and Convex Surface from Silica Hybrid Polyester.

Abstract

Polyester fibers are featured with trilobal cross-section and their suface is peeled off with an alkaline etching. Polyester fibers have poor suface touch in terms of KISHIMI (dry touch) and KOSHI (softness, suppleness). Fine concave and convex structure can be formed using the difference of solubility to alkaline solution between polyester matrix and the particles uniformly dispersed in the matrix. The polyester fiber with fine surface structure provides not only deep color shade, but also improved luster and handle properties of fabrics. In this paper, the theoretical mechanisms how the fine concave and convex structure in the order of light-wavelength can be formed on the surface of particle dispersed fibers was investigated. It is theoretically shown that the surface distance between particles of radius r is important and the roughness of the fiber suface shows the maximum at 0.2 r distance. The experimental results has shown that the fine structure can be formed when the main decentralization is in the vicinity of 2.2 r. The frictional and optical properties of dyed fabrics have been improved by taking these minute ruggedness modifications. The fine rugged fibers succeeds in providing a material of new types because of this big improvement.