Customizable Moisture Resistant Multiwall Paper Bags with High Load-bearing Capacity for Industrial Use
Product Details
| Bag Type: | Multiwall Paper Bag | Moisture Resistance: | Yes, With Polyethylene Lining |
|---|---|---|---|
| Dimensions: | Customizable | Thickness: | Typically 70-120 Gsm |
| Stackability: | Designed For Easy Stacking | Material: | Multi-layer Kraft Paper |
| Weightcapacity: | 5 Kg To 50 Kg | Water Resistance: | Limited Water Resistance |
Product Description
These colorful multi-layer kraft paper valve bags are manufactured from high-strength colored kraft paper as the base material. Featuring a 2 to 4 layer laminated structure combined with patented valve technology, this innovative design creates an eco-friendly industrial packaging solution specifically engineered for dust-free filling and transportation of granular and powdered materials weighing between 25 to 50 kilograms.
With robust construction and advanced valve systems, these bags ensure secure storage and handling, making them ideal for various industrial applications.
- Multi-layer Durable Structure: Crafted from high-quality colored kraft paper (80-120g/m²) with 2-4 layers bonded using water-based environmentally friendly adhesives. Features tensile strength of ≥4.5kN/m (machine direction) and ≥3.5kN/m (cross direction), with bursting strength exceeding 1400kPa. Withstands drops from 2 meters without damage.
- Vibrant Custom Color Printing: Supports spot color and four-color process printing with vivid colors and strong adhesion that resist abrasion and fading. High-definition print quality enhances brand recognition and product differentiation.
- Valve Seal Design: Options for built-in or external valves with ultrasonic heat sealing technology. Automatically closes during filling to prevent powder leakage and dust generation, compatible with automated filling lines.
- Moisture and Dust Barrier: Optional PE liner provides moisture-proof and leak-proof protection while blocking water vapor and dust, significantly extending material shelf life.
- Eco-friendly and Biodegradable: Made from renewable plant fiber kraft paper, recyclable and naturally degradable. Complies with plastic ban requirements and green supply chain standards.
- Space-saving Stackability: Square bottom and three-dimensional structure enables neat, stable stacking that resists sliding and collapse, improving storage space utilization.
Kraft paper must be made from 100% virgin wood pulp, with weight ranging from 70 to 120 grams per square meter. Free from damage, unpleasant odors, or impurities.
| Parameter | Tolerance |
|---|---|
| Length | ±5mm |
| Width | ±5mm |
| Fold Width | ±5mm |
| Valve Mouth Width | ±5mm |
| Valve Mouth Length | ±5mm |
Text and graphics must be sharp and clear with even coloration, no ghosting or missing prints, and strong adhesion. Bag body should be flat without wrinkles, damage, or stains. Valve mouth must be properly aligned, tightly sealed, and free from glue detachment or gaps.
| Industry | Applicable Materials | Core Requirements |
|---|---|---|
| Chemical Industry | Carbon black, white carbon black, plastic masterbatch, pigments, dyes, additives, chemical fertilizers, compound fertilizers | Moisture resistance, anti-static properties, corrosion resistance, dust-free filling, high load-bearing capacity |
| Building Materials | Cement, dry powder mortar, gypsum powder, putty powder, lime powder, insulation materials | High load-bearing, impact-resistant packaging, powder leak prevention, easy stacking, moisture protection |
| Food and Feed | Flour, starch, sugar, salt, feed, grains, food additives (vitamins, amino acids) | High cleanliness, light avoidance, moisture resistance, odorless packaging |
| Mining and Energy | Mineral powder, coal powder, metal powders, activated carbon, graphite powder | Dust prevention, moisture resistance, high strength, leak-proof features |
| Other Industries | Pharmaceutical intermediates, daily chemical powders, refractory materials, chemical raw materials | Packaging for powdered or granular materials (25-50 kg) |
- Dimensions: Length 500-900 mm, width 300-600 mm, flange width 50-150 mm; non-standard sizes available
- Load Capacity: 25 kg, 30 kg, 40 kg, 50 kg options with layer count and paper weight designed accordingly
- Layer Count: 2 layers, 3 layers, 4 layers; standard is 3 layers (2 paper layers + 1 film layer)
- Colors: Custom colors including red, yellow, blue, green, black, white, and Pantone matching
- Printing: High-definition printing from 1 to 4 colors; capable of printing logos, company names, product specifications, QR codes
- Techniques: Offset printing, embossing, intaglio printing, and lamination options
- Reinforcement: Double-layer bottom reinforcement, side reinforcement ribs, valve mouth strengthening
- Openings: Internal valve, external valve, easy-tear openings, air vents to prevent bulging
- Requirement Communication: Confirm material characteristics, load capacity, dimensions, colors, printing, and functional needs
- Design Proposal: Free design drawings and sample confirmations provided
- Production and Delivery: 20 to 30 days delivery with logistics tracking throughout the process
- After-sale Service: Unconditional returns and exchanges for quality issues, with technical support available
Product Highlights
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