LOW WEAR DEBRIS POLYOXYMETHYLENE COMPOSITION AND RAMP MADE OF SUCH POLYOXYMETHYLENE COMPOSITION SUITABLE FOR VARIOUS HDD DESIGN

摘要

A polyoxymethylene composition includes a polyoxymethylene copolymer with 1,3-dioxolane as a comonomer, a wear resistance agent, a nucleating agent, and an antistatic agent. A ramp is made of the polyoxymethylene composition. The ramp and the polyoxymethylene have excellent low-wear-debris property. The low wear debris polyoxymethylene composition can be used to produce a ramp for various designs of hard disks, such as PMR (perpendicular recording) + TDMR (Two-Dimensional Magnetic Recording), SMR (Shingled Magnetic Recording), HAMR + (HAMR (Heat Assisted Magnetic Recording)+ SMR + TDMR), BPMR + (BPMR (Bit Pattern Media Recording) + SMR + TDMR), and helium-filled hard disk.