Biodegradable Kraft Paper Valve Bags with Customizable Sizes for Dust-Free Automated Filling
Kraft paper valve bags are specialized multi-layer packaging bags designed specifically for industrial powder materials. They are crafted using high-quality, high-strength kraft paper through a multi-layer lamination process, ensuring durability and reliability.
Equipped with a professional valve filling structure, these bags provide an efficient and secure way to package dry powders, powders, and granular materials. This design enhances the filling process and maintains the integrity of the contents during handling and transportation.
Currently, kraft paper valve bags are recognized as a premium and eco-friendly packaging solution widely used across various industries. Their robust construction and environmentally conscious materials make them an excellent choice for general-purpose packaging of dry bulk materials.
- Multi-layer Reinforced Structure: 2 to 4 layers of high-quality kraft paper in cross-laminated composite structure, bonded with environmentally friendly water-based glue. Withstands drops from 1.5 meters without damage.
- Valve Sealing Design: Standard inner and outer valve design for dust-free automated filling, compatible with fully automated powder filling equipment.
- Moisture and Dust Barrier: Optional PE moisture-proof liner provides excellent barrier properties against moisture, seepage, and dust intrusion.
- Smooth, Sturdy Shape: Flat-bottom, three-dimensional design maintains neat, full square form for secure stacking and efficient storage.
- Eco-friendly and Recyclable: Made from 100% virgin wood pulp kraft paper, non-toxic, odorless, pollution-free, recyclable, and biodegradable.
- Clear and Attractive Printing: Supports multi-color, high-definition printing with crisp, durable text, logos, and patterns.
| Parameter | Specification |
|---|---|
| Raw Material | 100% wood pulp extensible kraft paper (80-100 gsm), environmentally friendly water-based composite adhesive |
| Dimensional Tolerance | ±5 millimeters for length, width, fold edge width, and valve flap dimensions |
| Tensile Strength | Machine direction: ≥4.5 kN/m, Cross direction: ≥3.5 kN/m |
| Bursting Strength | ≥1400 kPa |
| Drop Test | Withstands 2-meter drop without damage or powder leakage |
| Appearance | Smooth, square bag body free of wrinkles, damage, stains, or deformations |
- Building Materials: Dry mortar, putty powder, gypsum powder, lime powder, cement, insulation powder
- Chemical Industry: Carbon black, pigments, dyes, plastic masterbatches, chemical additives, compound fertilizers
- Food and Feed: Flour, starch, corn flour, edible sugar powder, salt, food additives, feed powder
- Mining & New Materials: Mineral powder, graphite powder, metal powders, activated carbon, refractory powders
Specifications: Multi-layer structures (2-4 layers), standard weights (25kg, 30kg, 40kg, 50kg), custom dimensions including length, width, gussets, and valve sizes.
Printing & Appearance: High-definition printing (1-4 colors), company branding, product specifications, QR codes, natural kraft or colorful designs.
Functional Features: PE moisture-proof liners, reinforced bottoms, strengthened side seams, enhanced valve mouths, breathable vents, easy-tear openings.
Collaboration Process: Demand confirmation, solution matching, design layout, sample proofing, mass production, quality inspection, and after-sales support.
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