| 摘要 |
The present invention relates to a CAM for a chair, produced by a polyketone copolymer which has intrinsic viscosity (LVN) of 1.0 to 2.0 dl/g measured at 25°C using hexafluoroisopropanol (HFIP). The CAM can solve a wear problem of the cam according to long-term use due to excellent wear resistance and impact resistance, and is quiet. |
