344 pages | 276 Color Illus.
The aim of this book is to provide the background of the warp knitting patterning with a large amount of simulated 3D images of the structures, corresponding to the modern available tools for this. The warp knitted structures can have very complex architectures and very limited understanding exists on how they are built. The pattern book will allow the readers to look at complex pattern with marked separated yarns with different colours to understand how they are bound while searching for relations between the architectures and their properties. It also includes architecture of the warp knitted structures along with technical know-how of production of these structures on machines.
Background. Short introduction in the warp knitting fabric production. Single needle bed machines. Single guide bar fabrics. Two bar fabrics (Full set threading). Two bar Fabrics (Part set threading). Three and four bar fabrics. Laid-in Fabrics. Cut Presser Fabrics and Knock-off Laps. Raschel Laces. Fall plate Fabrics. Double needle bed (Raschel) machines. Background information. Bar arrangements, types of bars. Two bar fabrics. Multiple bar fabrics. Spacer fabrics. Jacquard warp knitted structures. Fundamentals - process, guide arrangement, threading, codign. Single needle bed jacquard fabrics. Double needle bed jacquard fabrics. Engineering design of warp knitted structures. Geometrical models for yarn axis coordinates - state of the art, principles, limitations. Theoretical calculations for warp knitted structures - run-in per guide bar, specific weight after production and after shrinkage and stretch - theory, practical examples, comparison between the theoretical models calculated with TexMind Warp Knitting Editor and real samples. Modelling strategies for simulation of the mechanical behavior. Case studies of numerical investigation of the tensile and compression behavior. Quality insurance aspects - related yarn properties, fabric defects, fabric properties