The kraft paper open bag, also known as an open-mouth bag or open-end paper bag, is manufactured from high-strength kraft paper through precision processes including bag making, cutting, and bottom reinforcement. This creates a reliable open-style packaging container ideal for various industrial applications.
Featuring an open-mouth design that eliminates complex valve structures, these bags offer easy and efficient filling. The design is fully compatible with automated filling production lines, significantly enhancing operational productivity.
These versatile open bags are extensively used for packaging solid particles and powdered materials across multiple industries including industrial manufacturing, agriculture, and construction materials.
| Parameter | Specification |
|---|---|
| Kraft Paper Substrate | Pure wood pulp extending kraft paper, free from impurities, damage, or unpleasant odors |
| Composite Layer (Optional) | Food-grade PE film for moisture resistance, odorless, non-toxic, with uniform coating and strong adhesion |
| Layer Configuration | 2 to 4 layers of kraft paper lamination based on load requirements (2-3 layers for 20kg, 3-4 layers for 50kg+) |
| Bag Making Process | Precision cutting with smooth edges, secure bottom stitching to prevent material leakage |
| Sealing Adaptation | 5-10mm reserved area for stitching or tying, compatible with cable ties and sewing machines |
| Printing Process | Eco-friendly water-based inks with multi-color capability, fade-resistant, compliant with industry standards |
Standard capacities of 20kg, 25kg, and 50kg available, with flexible options ranging from 10kg to 80kg. Bag length, width, and bottom depth can be precisely adjusted to accommodate material density and automated filling equipment parameters.
Default colors include natural kraft brown and white, with custom colors available to match client brand visual identities and meet diverse industry aesthetic requirements.
Multi-color flexible printing for branding with logos, product names, specifications, weights, production dates, transport warnings, and multilingual labels. Printing content can be aligned with industry-specific standards such as "Moisture Proof" or "Fragile" labels for enhanced brand recognition and professionalism.