| 摘要 |
A spindle (10) suitable for winding up coreless rolls (11) of a stretchable plastic film; the spindle (10) comprises a tubular body having a peripheral wall (12) defining at least one internal chamber (14) connectable to a pressurized air source. A plurality of perforations (17) extends from the internal chamber (14) of the spindle (10), through the peripheral wall (12) and a protective layer (19) of hard chrome having a sandblasted outer surface (18) with an average roughness ranging between 6 and 6.5 μm, obtained by dry sandblasting. |
