Flat Bottom Kraft Multiwall Bags Valve Mouth Gusseted Multi Layer Paper Bags
Designed for heavy weight product packaging with excellent load-bearing capacity and protective features.
Product Overview
Multi-layer kraft paper bags are manufactured using 100% pure wood pulp high-strength kraft paper through multi-layer composite pressing technology. These bags feature a stiff, tear-resistant body with exceptional load-bearing capacity. Optional PE moisture-proof coating provides superior dustproof, moisture-proof, and anti-tear performance.
Made from eco-friendly, degradable raw materials, the bags contain no fluorescent agents, heavy metals, or other harmful substances. They are odorless, safe, and widely suitable for packaging and transportation of powders, granules, chemical materials, building materials, food raw materials, and various other goods.
Key Features
- Multi-layer Structure & High Tear Resistance: Constructed with 2 to 4 layers of kraft paper bonded by high-temperature pressing. Features strong vertical and horizontal tensile strength with excellent tear and impact resistance. Ideal for packing goods weighing 20-50kg.
- Moisture & Dust Proof with Excellent Sealing: Custom inner PE coating effectively blocks moisture and dust, preventing material caking and deterioration. Outer kraft paper is wear-resistant to avoid package damage during transit.
- Firm Shape & Stable Stacking: Square bottom three-dimensional design allows bags to stand upright neatly, saving warehouse space. Compatible with automatic filling machines and manual handling.
- Eco-friendly, Non-toxic & Standard Compliant: Made of food-grade degradable kraft paper with zero plastic pollution. Free of fluorescent agents and heavy metals, safe for direct contact with food-grade raw materials.
- Exquisite Printing for Brand Promotion: Supports 1-4 color flexographic and offset printing. Custom logos, product names, specifications, warning marks, and QR codes available with clear, fadeless printing.
- Cost-effective & Widely Applicable: Lightweight yet high strength, more eco-friendly and elegant than traditional woven bags. Reusable with reasonable cost, suitable for domestic and overseas sales.
Technical Parameters
| Parameter |
Specifications |
| Material & Technology |
100% pure wood pulp extensible kraft paper; Optional 2/3/4 layers; Laminated by high-temperature pressing; Optional PE coating (0.02-0.05mm thickness) |
| Specifications & Dimensions |
Standard sizes for 20kg/25kg/40kg/50kg; Square bottom valve bags, open-mouth bags; Custom dimensions available; Dimensional tolerance ≤±5mm |
| Physical Properties |
Longitudinal tensile strength ≥30N/15mm; Transverse tensile strength ≥25N/15mm; Bursting strength ≥200kPa; No bag breakage in drop tests |
| Printing & Compliance |
Custom 1-4 color printing; Compliant with GB/T 22865-2008 and GB/T 10335.4-2018 standards; EU compostable certificates and food contact safety test reports available |
Applications
- Building Materials & Chemical Industry: Ideal for cement, putty powder, gypsum powder, talc powder, calcium carbonate, fly ash, lime powder, mortar additives, and coating additives.
- Agriculture & Animal Husbandry Industry: Suitable for compound fertilizer, organic fertilizer, chemical fertilizer, feed pellets, grains, soybean meal, bran, and aquatic feed.
- Food Raw Material Industry: Perfect for flour, starch, white granulated sugar, maltodextrin, food additives, baking ingredients, and grain powder.
- Industrial Raw Material Industry: Applicable to chemical powder, rubber and plastic particles, carbon black, pigments, resin powder, metal powder, refractory materials.
- Other Usages: Available for mining powder, building auxiliary materials, bulk import & export goods, and eco-friendly storage applications.
Customization Options
- Layer Customization: Choose from 2, 3, or 4 layers based on load-bearing and protection requirements.
- Material and Process Customization: Options include pure kraft paper without lamination, PE laminated moisture-resistant versions, and customizable weight from 70 to 150 g/m².
- Printing Customization: Available 1 to 4 color printing for logos, brand names, product specifications, warning messages, QR codes, and multilingual instructions.
- Special Customization: We can tailor products according to unique customer demands.
Customization Process
1. Requirement Discussion: Customers provide details about usage scenarios, layers, weight, specifications, processes, printing content, and order quantity.
2. Design and Layout: Free design services and specification calculations with design drafts for approval.
3. Sample Confirmation: Free physical samples provided for material quality, thickness, printing effect, and dimension verification.
4. Mass Production: Production scheduled following approved sample standards with strict quality control.
5. Quality Inspection and Shipment: Each batch undergoes thorough inspection before shipment with logistics tracking services.
Customization Advantages
- Direct supply from source factory with competitive pricing for bulk orders
- Professional team support including free design and sample services
- Strict quality control adhering to technical standards
- Versatile customization suitable for domestic and international markets
