Skill Showdown at SHANDONG FULLY PACKING MATERIALS CO., LTD.

At SHANDONG FULLY PACKING MATERIALS CO., LTD., an exciting production skills competition recently took place, spotlighting the creation of POF shrink film. POF, short for polyolefin, is a plastic film renowned for its excellent shrink properties, high clarity, and strong durability.

The production process of POF shrink film at this factory is a complex yet fascinating one. First, high - quality polyolefin resin pellets are carefully selected as the raw material. These pellets are then fed into an extruder, where they are melted at precisely controlled temperatures, usually ranging from 180 to 230 degrees Celsius. The molten polyolefin is forced through a flat die to form a thick film.

After extrusion, the film undergoes a stretching process. This is done in both the longitudinal and transverse directions simultaneously, typically in a tenter frame. Stretching aligns the polymer chains, enhancing the film's strength and shrink characteristics. The stretched film is then rapidly cooled using air or water quenching to lock in the orientation of the molecules.

During the competition, operators from different production lines demonstrated their expertise. They were judged on their ability to set up the machinery accurately for optimal production. This involved precisely adjusting the extrusion temperature, screw speed, and the tension during stretching. The thickness and uniformity of the film were closely monitored. A perfect POF shrink film should have a consistent thickness within a very narrow tolerance, ensuring even shrinking when exposed to heat.

This competition not only motivated the workers to improve their skills but also led to the exploration of new techniques, promising even better - quality POF shrink film production in the future.