本文概述了易于理解的过滤系统原理，因为它们与金属加工冷却液过滤用非织造辊介质的选择有关。定义了过滤介质选择标准。描述并比较了不同非织造布制造工艺和材料组成产生的过滤特性。提供了一种定量、连续的方法，用于对过滤介质进行简单但有效的比较初步和运行中评估。使用适当的统计方法来支持评估和选择过程，并监控过滤系统性能，以持续改进金属加工操作的质量、生产率和成本状况。

THIS PAPER PROVIDES AN OVERVIEW OF EASILY UNDERSTOOD FILTRATION SYSTEM PRINCIPLES AS THEY RELATE TO THE SELECTION OF NONWOVEN ROLL MEDIA FOR METALWORKING COOLANT FILTRATION. FILTER MEDIA SELECTION CRITERIA ARE DEFINED. THE FILTRATION CHARACTERISTICS CREATED BY DIFFERENT NONWOVEN MANUFACTURING PROCESSES AND MATERIAL COMPOSITIONS FOR THIS APPLICATION ARE DESCRIBED AND COMPARED. A QUANTITATIVE, SEQUENTIAL METHODOLOGY IS PROVIDED FOR CONDUCTING SIMPLE, YET EFFECTIVE, COMPARATIVE PRELIMINARY AND IN-OPERATION EVALUATIONS OF FILTER MEDIA. THE USE OF APPROPRIATE STATISTICAL METHODS ARE PRESENTED TO SUPPORT THE EVALUATION AND SELECTION PROCESS AND FOR MONITORING FILTRATION SYSTEM PERFORMANCE TO CONTINUALLY IMPROVE THE QUALITY, PRODUCTIVITY, AND COST POSITION OF METALWORKING OPERATIONS.