Metalworking: In automotive manufacturing, sandpaper is used for body panel repair and paint pretreatment. In aerospace, fine-grit sandpaper (e.g., 1000# and above) is used for precision polishing of titanium alloy parts to reduce surface stress concentration.
Wood Finishing: In furniture manufacturing, coarse-grit sandpaper (e.g., 80#) is used for quick leveling of wood, while fine-grit sandpaper (e.g., 400#) is used for final polishing to enhance the clarity of the wood grain.
Composite Material Processing: In carbon fiber component manufacturing, sandpaper must be used in conjunction with a coolant to prevent material delamination due to high temperatures. Grit selection must be adjusted according to fiber direction, typically starting with perpendicular sanding and then parallel sanding.
Electronics Industry: In semiconductor packaging, ultrafine sandpaper (e.g., 5000#) is used for wafer backside thinning, controlling thickness tolerance within ±2μm.
Medical Field: Custom sandpaper is used in denture fabrication to achieve biocompatibility treatment of crown surfaces by controlling grit distribution.
