Abstract
Zener's model, which considers viscoelastic components of sizing film behavior, is developed using data from axial tension tests. The stress-strain results at different size formulations are used to determine model parameters. The ability of the model to predict the response to different loading conditions is examined by comparing the model simulation with the available experimental data. Tensile strength and extension of films were affected by hydrophilicity of the plasticizer and its concentration. Lower mechanical resistance when using lipid additives was also reported. The performance of a warp-sizing formulation is determined in part by the properties of lubricant type applied with it.