New High-Precision Mirror Polished Roller For Film Production Line

Qingdao Jinhecheng Machinery Co., Ltd. has launched a new line of mirror polished stainless steel rollers for film and sheet extrusion lines, achieving a consistent surface finish of Ra ≤ 0.01μm - a level that previously relied on expensive imports.
The Problem It Solves
Standard polished rollers often show uneven surface quality from batch to batch, and micro-scratches start appearing after 6–12 months of use, leading to visible streaks on the final film product and costly production downtime.
What's New
Jinhecheng rebuilt the entire finishing process - deeper base grinding to remove stress layers, multi-stage polishing with progressively finer media, and a final buffing treatment that closes the surface grain without thermal distortion. The result is a true mirror surface with no orange peel or polishing lines, even under strong LED inspection.
Key Benefits
Cleaner film output with fewer surface-related defects
Longer service life thanks to the densified, scratch-resistant surface
More uniform cooling across the web width
Roughly 40–50% lower cost compared to imported premium rollers, with local after-sales support
Applications
Suitable for cast film lines, sheet extrusion, calendering, and lamination equipment. Custom sizes available from 150–800mm diameter, face lengths up to 6 meters. Hard chrome or DLC coating options also offered for more abrasive materials.