Multi-layer paper plastic composite bag, also known as three-in-one bags, are simply bags made of three layers of materials glued together. They are much stronger and more upscale than ordinary bags.
They are made of an outer layer of kraft paper, a middle layer of film, and an inner layer of PP woven fabric. Some also have an additional PE inner film for better moisture protection. They feel firm and thick, not flimsy, and stack very neatly, saving considerable space in the warehouse.
The advantages of these bags are high strength, impact and abrasion resistance, easily handling about 25 kg of materials. The smooth kraft paper surface allows for clear and attractive printing, making it ideal for logos and product information, especially for export packaging. Their moisture and leak protection is also significantly better than ordinary woven bags, preventing moisture damage or spillage when storing fine powders, granules, or chemical raw materials.
They are mainly used for storing products such as plastic granules, masterbatches, chemical raw materials, fertilizers, feed, and mortar powder, especially suitable for applications requiring both aesthetic appeal and moisture protection.
The most commonly used sizes are 55×90cm, 60×90cm, and 50×80cm, generally for holding around 25 kg of materials. Other sizes can also be customized upon request.
Purchase Tips
• Check the composite layer: The paper and plastic should be firmly bonded and not easily peel off.
• Feel the thickness: It should feel thick and solid, not soft or flimsy.
• Test the tensile strength: The bag should be resilient when pulled at the corners and not easily break.
• Check the printing: The patterns and text should be clear, not blurry, and not smudge.
• Test the drop: When fully loaded, it should not break, leak, or split open when dropped from about one meter.
Overall, multi-layer paper plastic composite bags have strong load-bearing capacity, good waterproofing, and high cost-effectiveness.
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