Mirror Polished Ra 0.2 µm Stainless Steel 304 Forming Collar for High-Speed Vertical Packaging Machines

The ZHIJING Mirror Polished Forming Collar is a high-performance replacement component for the film forming station of vertical packaging machines that run at high speed. As lines accelerate, the film web passes over the forming collar with increasing pressure and speed, and any surface roughness on the collar becomes a source of friction, heat and micro-scratches on the packaging web. This collar is manufactured from stainless steel 304 and finished with an inner surface mirror polished to Ra 0.2, creating a film path so smooth that printed and coated films glide through with minimal drag. The benefit is visible immediately on the finished bags: brighter prints, no scuff marks, and fewer rejects caused by film distortion.

Low friction on the forming surface also reduces the amount of tension the film pull belts must generate, which protects thin films from stretching and helps the machine hold accurate bag length at speed. For converters running static-sensitive films, an optional anti-static and low-friction surface treatment can be applied to the same collar, further reducing dust attraction and erratic film behavior. Every collar is manufactured to your exact bag width, tube dimensions and mounting arrangement, and the mirror finish is protected during transport so the collar arrives ready to install. With a bag width range of 50 mm to 800 mm, the design covers everything from small sachet lines to large bag form-fill-seal machines.

• Mirror Polished Ra 0.2 Film Path: The ultra-smooth inner surface minimizes friction and prevents micro-scratches on printed and coated packaging film.
• High-Speed Performance: Low drag keeps film tension stable at high line speeds, protecting thin webs from stretching and length drift.
• Stainless Steel 304 Construction: The rustproof body is suitable for food production, washdown cleaning and humid environments.
• Print Protection: The scratch-free film path keeps gravure and flexo prints bright and unmarked from the former to the finished bag.
• Optional Anti-Static Treatment: A low-friction anti-static finish is available for static-sensitive films and dusty products.
• Made to Your Exact Specification: Bag width, tube size, mounting holes and collar geometry follow your drawings and original part.

This mirror polished forming collar suits vertical form-fill-seal machines producing pillow bags, sachets and side gusset bags from printed film, laminated film and metallized film at high output rates. Typical products include snacks, confectionery, coffee, frozen food, pasta, rice and pet food packed on high-speed lines where bag appearance and film economy matter. The collar also performs well with thin gauge films that are easily scratched or stretched on conventional formers. The same mirror finishing service is available for forming tubes, shoulders and film guides, so a complete forming station can be upgraded to low-friction performance. Send us your film structure, bag dimensions and machine model, and our engineers will confirm the collar geometry and finish that best fits your line.

Mirror polished surfaces demand careful handling: each collar is wrapped in soft anti-scratch material and packed in a rigid carton or plywood case, so the optical-grade finish arrives untouched. ZHIJING is an ISO9001 certified manufacturer, and every collar is verified for material grade, dimensions and surface roughness before dispatch, with material certificates and inspection reports available on request. Pre-production samples can be arranged for volume orders. OEM and ODM projects are accepted worldwide, and our engineers provide responsive technical support for collar selection, installation and machine tuning to help you achieve maximum line efficiency.