Material composition of paper plastic composite bag

Paper plastic composite bag is a laminated packaging product combined with paper and plastic raw materials, supplemented by adhesive and auxiliary processing materials. Its material collocation determines basic strength, waterproofness and printing performance.

Kraft paper serves as the outer main layer. It features high toughness, good stiffness and fine printing adaptability. It can present brand patterns and text clearly, and resist surface scratch and friction during handling. Common specifications vary by bag load capacity for different packaging needs.

Plastic film is the core inner functional layer. Polyethylene and polypropylene are the most widely used raw materials. This compact plastic layer brings waterproof, moisture-proof and dustproof effects, and greatly improves tensile and anti-tear strength, avoiding goods leakage. Woven plastic cloth is adopted for heavy-duty bags to boost bearing capacity.

Environmental composite adhesive bonds paper and plastic layers firmly. It ensures no delamination under extrusion, stacking and transportation. Qualified glue is non-toxic and odorless, applicable to food-grade packaging scenarios.

Minor auxiliary materials include sealing thread, hot-melt adhesive and edge protection materials. They assist bag sealing, edge reinforcement and finished forming, guaranteeing overall structural stability in actual use.

Overall, the reasonable combination of paper, plastic, adhesive and accessories makes the bag balance appearance, protection and practical carrying performance.

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Citation Formats

APA 7th

Wang, Q. (2025). Material composition and characteristics of paper plastic composite bags. Packaging Industry Journal.

MLA 9th

Wang, Qian. Material Composition and Characteristics of Paper Plastic Composite Bags, Packaging Industry Journal, 2025.

IEEE

[1] Q. Wang, "Material composition and characteristics of paper plastic composite bags," Packaging Industry Journal, 2025.