Technical Documents

Wool Felt Selection and Use Guide (pdf) – Polishing (“mechanical polishing” or MP¹) should be thought of in terms of very, very fine grinding that is engineered by choice of abrasive and technique to remove less and less material progressively from the surface of a product. Essentially, polishing reduces the roughness of a surface making it reflective – a shiny or “mirror” finish. A polishing felt or fabric is merely a
compound carrier, a “media”. Standard practice is to use an abrasive compound with the media, and to use a technique (force and motion) such that the abrasive does the work. Read more…

Animal Derived Ingredient-free Alternative to Wool (Jan 2022 pdf) – Spartan’s patented HP (High Performance) media are based on synthetic fiber and are ADIfree. HP45® looks like dense wool but is formulated to provide performance that exceeds the capabilities of wool. HP45® tools can be used exactly like wool tools yet will provide faster, more accurate finishes. The reason is that more force can be applied to HP45® tools because the resistance to friction heat is higher, and the porosity of HP media will channel heat away from the surface. Cooling air is more effective, resulting in a tool that stays cooler under higher force and friction. The application of higher force to drive the abrasive to the surface being polished results in faster material removal.

Selection of Spartan Pads for Application-Specific Environments Ver 2 (pdf) – Much has been written about the polishing process especially the interface of pads, specific slurries and equipment for applications involving optics and semiconductor materials. My focus is on how various Spartan Polishing Pads can address applications-specific requirements. At Spartan Felt Company we manufacture synthetic materials that are best suited for industrial, optic, electro-optic, semiconductor, compound semiconductor and advanced materials surface preparation. Download for more.

HP®-Media-Technical-Bulletin-V6 (pdf) – An Innovative Polishing Media Polishes Hard Metals Faster and with Improved Accuracy. A synthetic polishing felt has been found to significantly improve the ability to polish a titanium alloy and 316 stainless steel over wool. Spartan High Performance (HP®) products are the only synthetic media of its kind, with properties that improve polishing results and efficiency. With high heat resistance and low heat absorption, HP® media can withstand the stress of friction heat longer than wool, or any other media tested. Polishing tools made with HP® media can be driven under much higher pressure to remove material from the surface being polished, improving efficiency. Tools can also be shaped to match a profile of a part and will maintain the shape during the polishing process. This results in a more even amount of material being removed from the substrate surface, so the chance for deformation from polishing is considerably reduced. HP® media can be impregnated with abrasives, which eliminates the need and mess of compounds. And it is not affected adversely by water, so polishing tools can be used in CNC or similar processes that are wet from cooling water. Wool, however, was found to be more effective in achieving mirror finishes, and though HP® media will finish faster and more evenly, wool is recommended as a final step in cases where mirror finishes are required. Download for more.

Spartan Technical Bulletin Pad Evaluation for Prime Si/Sapphire CMP  (pdf)- Spartan Stock Removal Pads meet the industry standard for stock removal, flatness and generated surface finish requirements. All stock removal pads are manufactured in the USA using green technology. Custom pad diameters and thickness are available with Pressure Sensitive Adhesives (PSA) to meet your application requirements. These pads tested (on silicon) can be also be employed for sapphire and silicon carbide applications with process adjustments on the polishing machine being used with different slurry compositions. Download for more.