| 摘要 |
Expansion resistant filter cartridge assemblies are provided that facilitate filtering of strong solvent solutions. The filter cartridge assemblies generally include a cylindrical filter element defining an outer periphery, an inner periphery and opposed end surfaces, a perforated cage operatively associated with the outer periphery of the filter element, a perforated core operatively associated with the inner periphery of the filter element and having opposed ends and a predetermined length, and an end cap operatively associated with each of the opposed end surfaces of the filter element and bonded to each end of the core. The perforated cage generally includes an expansion region of about 2.5% to about 4% of the total length of the filter cartridge, e.g., a region of axial discontinuity or a plurality of angular struts, to accommodate swelling and/or dimensional expansion of the cage without adversely affecting the integrity of the filter cartridge assembly. Alternatively, an expandable net material may be provided to accommodate expansion/swelling thereof. The core of the filter cartridge assembly is advantageously fabricated from material(s) that resist swelling/expansion when exposed to strong solvent solutions, e.g., glass filled polypropylene, a fluorinated aliphatic hydrocarbon, a filled polyolefin polymer and/or a polymer that includes a functional filler, e.g., glass fiber, a mineral-based filler, talc or the like.
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