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When buying stretch film, most buyers focus on thickness, stretch rate and price, but often overlook the paper core inside the roll. In fact, core quality directly affects both performance and real cost. First, consider core weight. Stretch film is usually priced by roll weight, so the heavier the core, the less film you actually receive. Reliable manufacturers state both net weight and gross weight. Hand film cores typically weigh 0.2–0.5 kg, while machine film cores are slightly heavier. Always ask whether the price includes the core. Second, check core strength. Weak cores can be crushed or deformed during shipping, which makes the roll hard to load onto a stretch wrapper or causes jamming and film breaks during hand wrapping. A quality core has thick walls and stays round under pressure. Finally, make sure the inner diameter fits. The most common sizes are 38 mm and 76 mm, and machine film cores must match the mandrel of your wrapping machine. Dongrun Packaging produces its own paper cores, controlling quality from core to finished roll. We supply hand and machine stretch film from 12 to 50 microns, with custom specifications available. Contact us for a quote. |
