Tenacity, fracture mechanics and unknown coater web breaks
Abstract
A web break model, based on fracture mechanics, was used to investigate unknown coater web breaks. Runnability was defined as Lb , the length between breaks. The model includes the size distribution of defects (holes and light spots, for example), web strength and web tension. Defects, such as boles, were most detrimental to Lb. Tenacity and tensile were used interchangeably, due to their high correlation on these grades. Tenacity is a simple, precise, valid fracture toughness test that is easy to use. Strength correlated strongly with web breaks. A 10% increase in tensile related to a 26% increase in Lb.
Citation
Swinehart, D., & Broek, D. (1995, June). Tenacity, fracture mechanics and unknown coater web breaks. Paper presented at the Third International Conference on Web Handling (IWEB), Stillwater, OK.