How is POF Heat Shrink Film Manufactured? Complete Production Process & Technical Advantages
How is POF Heat Shrink Film
Manufactured?
POF heat shrink film has gradually become the premium replacement for traditional PVC and PE shrink packaging films across global food, daily goods, and industrial packaging industries. Whether you need to package regularly shaped cartons or special irregular finished goods, cross-linked POF shrink film delivers tight, neat wrapping results. With ultra-high transparency and a high-gloss surface finish, it perfectly restores the real look of packaged items, greatly enhances shelf visual appeal, and effectively elevates your brand and product grade, which explains why it has been widely recognized and applied in diverse packaging fields worldwide.
Raw Materials & Formulation
Raw materials for standard POF heat shrink film mainly consist of linear low-density polyethylene (LLDPE) plus copolymer polypropylene materials including TPP and PPC. Before formal production, these base resins are fully mixed with specialized functional additives such as anti-fog agents, anti-static modifiers and toughening agents, then manufactured into finished film via advanced multi-layer co-extrusion blow molding technology.
Production Process: Double-Bubble Technology
At Zhejiang Zhongcheng Packaging, we apply mature double-bubble production technology, also known internationally as the Polyblend process, to produce high-performance POF shrink film. The process follows four core stages:
Each type of raw material is independently melted and extruded through separate precision extruders, then converged inside a custom-designed multi-layer co-extrusion die to form the primary co-extruded base film.
The freshly extruded base film undergoes rapid low-temperature cooling for stable initial shaping.
We conduct precise reheating, secondary bubble blowing and directional stretching procedures to adjust the film's shrink rate, tensile strength and gloss.
Finally forming qualified finished POF heat shrink film rolls, with standardized, strict whole-process controls guaranteeing highly consistent and stable batch-to-batch performance.
Technical Advantages & Performance
Our finished POF packaging material effectively fixes the common drawbacks of traditional shrink films such as poor transparency, unstable shrink effect and easy tearing during automatic packaging, making it a highly cost-effective packaging material favored by packaging processors and end manufacturers around the world.
Zhejiang Zhongcheng Packaging Materials Co., Ltd is a professional integrated enterprise covering POF film R&D, customized production, global sales and full after-sales support. As a leading Chinese manufacturer specializing in high-end cross-linked POF heat shrink film, we can provide one-stop customized packaging solutions for global clients.
Feel free to get in touch with our sales team for samples, technical parameter consultation and bulk order cooperation.