Multi-layer kraft paper bags are manufactured using 100% pure wood pulp high-strength kraft paper through advanced multi-layer composite pressing technology. These bags feature a stiff, tear-resistant body with exceptional load-bearing capacity. An optional PE moisture-proof coating provides superior dustproof, moisture-proof, and anti-tear performance.
Crafted from eco-friendly, biodegradable raw materials, these bags contain no fluorescent agents, heavy metals, or other harmful substances. They are odorless, safe, and suitable for packaging and transporting powders, granules, chemical materials, building materials, food raw materials, and various other goods.
| Parameter Category | Specifications |
|---|---|
| Material & Technology |
Raw material: 100% pure wood pulp extensible kraft paper, free of impurities and damage with uniform texture. Layers: Optional 2/3/4 layers. Laminated by high-temperature pressing and eco-friendly adhesive, firmly bonded without delamination or peeling. Moisture-proof treatment: Optional PE coating (thickness: 0.02-0.05mm) with even coating without leakage or wrinkling; uncoated type features excellent air permeability. |
| Specifications & Dimensions |
Common capacity: Standard sizes for 20kg/25kg/40kg/50kg, customized according to material specific gravity. Bag types: Square bottom valve bags, open-mouth bags and other customized styles available. Sizes: Full customization of length, width and height; normal dimensional tolerance ≤±5mm with smooth and burr-free cutting edges. |
| Physical Properties |
Longitudinal tensile strength ≥30N/15mm, transverse tensile strength ≥25N/15mm. Bursting strength ≥200kPa; no bag breakage or material leakage in drop test. No glue separation or edge cracking; resistant to deformation and embrittlement under normal conditions. |
| Printing & Compliance |
Printing: Custom 1-4 color printing for logos, texts, barcodes and multilingual descriptions; printing position deviation ≤1mm, fadeless and clear printing. Standards: Compliant with GB/T 22865-2008 Kraft Paper and GB/T 10335.4-2018 Coated Paper and Board. EU compostable certificates and food contact safety test reports available. |
Direct supply from our source factory without intermediaries, offering competitive prices for bulk customization and flexible minimum order quantities. Professional team coordination provides complimentary design and sample services with rapid response to client needs and short customization lead times. Strict quality control adheres to technical standards, with every batch thoroughly inspected to guarantee defect-free products and stable long-term supply. Versatile customization suitable for various scenarios, supporting both domestic and international trade. Relevant environmental certifications and inspection reports available to help clients expand market presence.