Product Overview
Kraft paper valve bags are currently the most widely used high-end packaging containers in the powder and granular material industries. As an eco-friendly industrial packaging solution, these bags provide a sustainable option for various packaging needs.
The product is made from multiple layers of high-strength kraft paper composite. Featuring a valve for automatic filling and sealing, these bags work seamlessly with automated packaging equipment to achieve high-speed, dust-free filling processes.
Xinxiang Huayuan Paper & Plastic Bag Co., Ltd. boasts 19 years of professional bag manufacturing experience. With a fully automated production line, their products offer high strength, resistance to tearing, no leakage of powder, and a smooth appearance. These qualities make the bags suitable for large-scale packaging in industries such as chemicals, building materials, powders, food, feed, and new energy materials, both for export and domestic use.

Technical Specifications
Basic Technical Specifications:
Material: High-quality multi-layer stretch kraft paper with optional PE coating or inner lining
Layers: Customizable 2, 3, or 4 layers according to needs
Weight Capacities: 10kg, 15kg, 20kg, 25kg, 40kg, and 50kg
Bag Types: Square bottom valve bags, flat bottom valve bags, and top-opening valve bags
Valve Styles: Inner valve, outer valve, or extended valve
Printing: High-definition flexographic printing with 1 to 4 colors, custom logos, company information, barcodes, and English export layouts
Production Process Advantages:
Fully automated production line integrating bag making, paper cutting, bottom pasting, valve attaching, shaping, and packaging
High-temperature curing technology for strong adhesion, preventing glue peeling and bottom cracks
Automatic correction and tension control system for flat surfaces, uniform thickness, and standardized forming
Comprehensive inspection before shipment for bag breakage, glue leakage, dimensional errors, and printing defects
Quality Requirements:
Flat and square-shaped without wrinkles, damage, cracks, or noticeable glue marks
Firm bottom adhesion passing drop and compression tests without opening or layer separation
Properly centered and aligned valve for smooth filling without material blockage
Clear printing with accurate color registration, free from ghosting, blurring, or missing print
Strict adherence to size, weight, and layer specifications with controlled tolerances