Subcategory of stretchable packaging films used for securing parts and products and preventing load collapse in manufacturing industries. Handles polyethylene-based stretch films specialized for bundling palletized goods, protecting products during inter-process transportation, and securing loads in shipping packaging. Supports both hand-wrap and machine-wrap types, classified by specifications such as transparency, stretch ratio, and adhesive strength. Limited to bundling and securing specialized films that differ from cardboard boxes and cushioning materials, serving as packaging materials that improve work efficiency at manufacturing sites and maintain quality during transportation.