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Flat bags also named Four-finger Handle bag, they are fundamental plastic packaging formed by heat-sealing single-layer PE/PP films, featuring no handles or gussets and lying flat when unfolded. Key traits:
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Lightweight: 0.03–0.1mm thickness, ultra-low cost;
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High Sealability: Heat-sealed or self-adhesive closures protect contents from moisture/dust (ideal for food, hardware);
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Transparency: Clear material enables content visibility;
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Versatility: Used in retail bulk weighing, industrial part protection, e-commerce shipping, and home storage.
Eco-friendly variants now employ biodegradable materials (e.g., PBAT), aligning with sustainable demands. -
Heavy-Duty Protection: 0.18mm matte PE (tear resistance ≥35N) holds 18kg (6 winter coats); finger holes reduce pressure by 80% vs. string handles.
