What are the characteristics of POF heat shrink film?

POF heat shrink film (multilayer co-extruded polyolefin heat shrink film) is an environmentally friendly packaging material made primarily of linear low-density polyethylene (LLDPE) and copolymer polypropylene (PP). It possesses the following core characteristics and advantages:

1. Physical Properties

High transparency and gloss: Clearly displays product appearance, enhancing shelf appeal.

High shrinkage rate: Longitudinal shrinkage rate ≥60%, up to 75%, tightly wrapping irregularly shaped goods.

Flexibility and tear resistance: Uniform thickness (12-37μm), strong resistance to tearing, and not easily damaged during transportation.

Cold resistance: Remains soft at -50℃, suitable for frozen food packaging.

2. Environmental protection and safety

Non-toxic and environmentally friendly: Meets FDA/USDA food-grade standards; processing does not release harmful gases.

Soft edges: The four corners do not cut hands after shrinking, offering superior safety compared to PVC.

3. Processing and Cost Advantages

Low-Temperature Shrinkage: Shrinks at 80-120℃, consuming 30% less energy than PVC.

Lightweight (0.92): Lower unit cost than PVC (specific gravity 1.4), making it more economical in practical use.

4. Application Scenarios

Food and Pharmaceutical: Moisture-proof and dust-proof, extending shelf life.

Industrial Products: Impact-resistant, suitable for protective packaging of electronic products, automotive supplies, etc.