Characterization of neck bonded laminate nonwoven webs and photo printing paper.

摘要

Scope of study and Findings. The objective of this study is to characterize the mechanical properties of neck bonded laminate nonwoven webs and photo printing paper. The stress-strain relationships in various orientations of the orthotropic web were studied, and Poisson's ratio was determined using Digital Image Correlation. The experimental results have been compared with theoretical equations of Young's modulus in 45 0 orientation, and an error of 3.3% was observed. The viscoelastic properties of the web were characterized using time-temperature superposition and compared with actual relatively long term data of over three weeks. The out-of-plane elastic and viscoelastic properties of the web were determined. Effect of higher temperatures on the web was studied and the thermal coefficient of expansion was determined. The elastic properties of three different photo printing papers were characterized and the stress-strain relationships were fit into appropriate equations. Poisson's ratios for all the materials were determined using Digital Image Correlation. Dependence of all three photo paper's mechanical behavior on strain rate was determined. The elastic out-of-plane properties of the three papers was characterized and fit to appropriate equations.