Duraklean™ SL filters have been developed for the classification of a variety of formulated slurry products. Duraklean™ SL filter relies on either a graded-density or porosity depth filter design that enables it to remove defect-causing particles in each of its graded depth filter matrix. The particle size distribution of the desired slurry particles and solid content do not change after filtration. As a result, slurry quality is consistently delivered to manufacturing processes. Duraklean™ SL filters can be expected to provide excellent particle retention and yield long service life resulting in low total filtration costs.
DuraKlean™ SL filter is a line of all polyolefin depth filters, and is rigid-structured filters designed to overcome many of the deficiencies a typical melt-blown filter may encounter. The filter matrix is constructed using non-surfactant treated long bi-component fibers, each fiber has an inner polypropylene core and an outer polyethylene sheath. The filter matrix’s bi-component PE/PP fibers are thermally bonded at fiber-to-fiber contact points. The high degree of fiber-to-fiber bonding results in a clean and rigid filter structure.
This rigid structure eliminates both the need for a core and the possibility of unloading trapped contaminants due to media migration. Furthermore, the rigid structure retains its porosity structure while the graded depth structure removes a variety of particulates including deformable agglomerates that are disruptive to the CMP process. Because particles are retained throughout the filter matrix rather than on a single surface, the potential for premature filter“plugging”is greatly reduced. The resulting DuraKlean™ SL filters offer consistent and reproducible filtration performance throughout the filter service life.
Utilizing state-of-the-art manufacturing technology, DuraKlean™ SL filter grade 002, 003, 005, and 010 are engineered to combine an inner section formed by thermally bonded PE/PP fiber matrix and outer section formed by graded porosity PP non-woven filtration media(as shown in the lower-right image). Inner section is rigid structure having uniform pore providing reliable filtration. Outer section combines graded porosity and depth structure with a built-in pre-filtration layer positioned at the upstream side providing extended filter service life.
