Nonwoven abrasive pads

Identity and product boundaries

A nonwoven abrasive hand pad is a flexible, three-dimensional web carrying abrasive grain and a bond. Klingspor's NWT description identifies randomly arranged nylon fibers, resin, and abrasive grain in an open web. Its NWTCRSE-S6X9 sheet has no scrim backing. These are construction facts for that product family, not a formulation for every nonwoven pad. Klingspor NWT product description and specifications

The term nonwoven describes the web, not a particular abrasive mineral or product shape. Klingspor distinguishes soft webs without fabric lining, fabric-lined surface-conditioning material, highly compacted unitized and convolute products, and coarse cleaning webs. A hand pad differs from those machine belts, discs, and wheels even when all use nonwoven material. A coated abrasive sheet and a nonwoven web are also different carriers. Klingspor construction categories, coated-abrasive belt reference

Nonabrasive cleaning pads form a separate boundary. Klingspor's white NWAWHTE-6X94223 lists no abrasive grain, despite generic page prose describing grain-impregnated nylon hand pads. Its item-specific grain fields identify a nonabrasive product. The page also assigns a Fine grade and resin bond, so a grade word alone does not establish abrasive content. Neither the generic prose nor the word nonabrasive establishes a scratch-free result. Klingspor white pad, description and complete specifications

Sampled abrasive pads

The following products illustrate stated construction, not interchangeability. Unreported properties remain unknown.

The two 3M thicknesses are different source values. By unit conversion, 3/8 in is 9.525 mm, not 6.35 mm. Shared color, mineral, and grade do not erase the product distinction. Neither sheet reports a thickness tolerance or compression measurement basis. The PRO sheet expressly describes its values as averages unsuitable for specification purposes. 7447 TDS, both pages, 7447 PRO PDS, both pages

The PRO hand-pad flyer additionally describes a coating that reduces loading. It does not disclose that coating's composition or mass. This coating claim does not establish the same treatment on conventional 7447 or Klingspor NWT. 3M hand-pad guide, revision 07/23

Grade, color, and finish quantities

In 3M's July 2023 guide, A denotes aluminum oxide, S silicon carbide, VFN Very Fine, and ULF Ultra Fine. The table identifies 7447 and 7447 PRO as maroon A-VFN and 7448 and 7448 PRO as gray S-ULF. Its separate 7445 F-SFN entry has an asterisk identifying nepheline syenite, although the general key expands F as flint. The footnote matters to mineral identity. 3M guide, key, footnote, and product table

Synthesis from these product records. Color and grade identify a supplier's product variant. They do not, by themselves, specify a universal coated-abrasive grit, particle-size distribution in micrometers, or achieved surface roughness. None of the sampled pad sheets supplies an Ra or Rz acceptance value. A scratch-pattern claim and a measured roughness requirement are different evidence.

The 7447 product page compares performance with grade 1 steel wool and describes resistance to loading. Those are product-specific comparisons, not a general conversion between steel-wool grades, nonwoven grades, and coated-abrasive grit. The same page describes synthetic fibers generally, whereas the exact 7447 TDS identifies nylon. 3M 7447 item 7100066382, 7447 construction table

Composition and dimensional interpretation

The US SDS linked by that 7447 item covers 7447 and 7467 General Purpose Pads. Section 3 gives whole-product mass bands of 25 to 50% aluminum oxide, 20 to 35% nylon fiber, and 15 to 35% cured resin. It also lists filler, titanium dioxide, and pigment, with a trade-secret qualification. These are disclosure ranges, not an exact recipe, mineral purity, or measurements of a particular lot. These ranges are not established here for 7447 PRO, 7448, or NWT. 3M SDS 18-8534-2, version 9.00, sections 1 and 3

Dimensional synthesis. Pad length and width describe the cut footprint. For an open web, a mass divided by length × width × thickness would be an apparent pad density under the chosen thickness measurement condition. Compression and void space affect that value. It is not the solid density of nylon, resin, or abrasive mineral. The sampled technical sheets do not supply web porosity, basis weight in g/m², grain coating mass per unit area, or a density measurement method.

Application and evidence limits

The 7447 TDS names cleaning, finishing, blending, scuffing, and light deburring on specified material categories. Conformability and reduced loading describe intended behavior, not a guaranteed removal allowance or geometry tolerance. 7447 TDS Klingspor describes NWT as light-removal material that leaves a moderate scratch on metal and permits wet or dry use. These statements do not quantify cut rate or final finish. NWT description

3M's 7447 page permits dry use, water, or solvents and describes rinsing for reuse. This is not a universal chemical-compatibility statement. The page's resistance-to-rust claim concerns the pad, not corrosion protection of the workpiece. Neither rinsability nor resistance to loading proves absence of transferred fibers, mineral, resin, or previously removed material. 3M 7447 product details

The SDS describes sanding dust and requires consideration of the material being abraded. Its hazard classification does not establish process cleanliness or downstream suitability. No weld preparation qualification, food-contact suitability, residue limit, or corrosion test for a finished component is established by these sources. 3M SDS, sections 2, 7, 8, and 11

Process synthesis. Achieved finish depends on the pad and the workpiece condition together with contact, stroke direction, wear, and any liquid. The sources do not supply a transferable pressure, chemical recipe, cycle time, or guaranteed finish. A TDS mention of portable-machine use does not supply mounting or speed limits for an arbitrary machine assembly. Hand-pad dimensions and grades cannot supply a wheel's RPM rating. Related process distinctions appear in Finishing process references.

Source coverage and limitations

Reviewed on 29 October 2026 PDT. Coverage includes both pages of each 2020 3M technical sheet, both pages of guide 61-5005-0006-3 revision 07/23, the complete nine-page US SDS issued 13 October 2026, and the retrieved product descriptions and specification tables. The 7447 TDS date is retained in its printed numeric form. Undated web pages are retrieval snapshots, not evidence of historical formulation or availability.

The sampled products do not establish a universal nonwoven formulation or color chart. Klingspor's white-pad prose conflicts with its explicit nonabrasive fields. The 3M SDS calls its grouped product red, while the 7447 TDS and product guide call 7447 maroon. These source descriptions remain distinct. No independent particle-size analysis, comparative performance testing, contamination measurement, or application qualification is supplied here.