Multi-layer Kraft Paper Pasted Valve Multiwall Paper Bags
Sturdy valve multiwall paper bag engineered for optimal material handling performance and reliability.
Product Overview
The multi-layer valve bag is crafted using pure wood pulp extending kraft paper as the core material. Through a sophisticated multi-layer composite process, it is transformed into a specialized sealed packaging container featuring a professional valve structure.
This product combines the weight-bearing and protective qualities of multi-layer materials with the convenient sealing benefits of the valve design. Unlike traditional open-mouth bags, it requires no additional sewing or tying, and can automatically seal itself after filling. This ensures both efficient operation and effective material protection.
Additionally, the multi-layer valve bag supports customized printing, achieving a triple enhancement in practicality, sealing performance, and brand presentation.
Key Features
- Valve port sealing ensures efficiency and convenience, providing reliable closure
- Multilayer composite structure offers excellent load-bearing capacity and durability
- Effective moisture-proof sealing delivers comprehensive product protection
- Compliant with environmental standards for diverse application needs
- Flexible customization options for brand integration and specific requirements
Technical Specifications
| Parameter |
Specification |
| Substrate Material |
100% wood pulp Sulphate kraft paper, free from impurities, damage, and odors |
| Optional Composite Materials |
Food-grade PE inner film (odorless, non-toxic), environmentally friendly waterproof coatings |
| Layer Configuration |
2-4 layers standard (2-3 layers: 10-30kg, 3-4 layers: 30-50kg, 6 layers: 50-80kg) |
| Valve Structure |
Inner or outer valve options with precise positioning and sealing edges |
| Printing Technology |
Eco-friendly water-based ink, multi-color flexographic printing, 95% color accuracy |
| Quality Standards |
Firm bonding without delamination, smooth bag structure, stable shape after filling |
Industry Applications
Serving diverse industries including building materials, chemical industry, agriculture, food and feed sector, industrial raw materials, and foreign trade export fields.
Customization Options
Customization Scope
- Size and Capacity: Conventional 10kg, 20kg, 25kg, 50kg, or custom 10-50kg capacities
- Layer Configuration: 2 to 4 layers kraft paper composite structures with specified grammage
- Valve Type: Internal or external valves tailored to filling equipment and material characteristics
- Color and Printing: Natural kraft, white, brown base colors with multi-color flexographic printing
- Structure and Protection: PE inner film, waterproof coatings, anti-tear reinforcement
- Special Features: Export-grade packaging, food-grade compliance, anti-slip patterns, handles
Customization Process
Step 1: Requirement Communication
Submit specifications for capacity, dimensions, layers, valve type, printing design, and quantity. Receive expert advice and accurate quotations.
Step 2: Sample Production
Free sample production showcasing valve sealing, print quality, structure, and materials. Bulk production begins after client approval.
Step 3: Mass Production
Automated assembly line production following approved sample standards with comprehensive quality control.
Step 4: Inspection and Delivery
Batch inspections, packaging, shipping with logistics tracking and export customs documentation support.
