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Customizable Multicolor Kraft Paper Bags with Moisture Resistance
Product Overview
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.
Key Features
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.
Technical Specifications
Raw Material Requirements
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.
Dimensional Tolerances
Parameter
Tolerance
Length
±5mm
Width
±5mm
Fold Width
±5mm
Valve Mouth Width
±5mm
Valve Mouth Length
±5mm
Printing and Appearance Standards
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 Applications
Industry
Applicable Materials
Core Requirements
Chemical Industry
Carbon black, white carbon black, plastic masterbatch, pigments, dyes, additives, chemical fertilizers, compound fertilizers
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)
Customization Options
Specification Customization
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)
Color and Printing Customization
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
Functional Customization
Reinforcement: Double-layer bottom reinforcement, side reinforcement ribs, valve mouth strengthening
Openings: Internal valve, external valve, easy-tear openings, air vents to prevent bulging
Collaboration Process
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
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2007-09-18
Total Annual:
20000000-20000000
Employee Number:
50~100
Ecer Certification:
Verified Supplier
Xinxing Huayuan Paper-Plastic Bag Co., Ltd. Company Profile
Company Overview :
Established on September 18, 2007, Xinxing Huayuan Paper-Plastic Bag Co., Ltd. specializes in the paper packaging industry, providing high-quality paper-plastic packaging solutions for customers. Located in the Xinduo Ec... Xinxing Huayuan Paper-Plastic Bag Co., Ltd. Company Profile
Company Overview :
Established on September 18, 2007, Xinxing Huayuan Paper-Plastic Bag Co., Ltd. specializes in the paper packaging industry, providing high-quality paper-plastic packaging solutions for customers. Located in the Xinduo Ec...