This kraft paper valve bag is crafted using a multi-layer composite process with high-quality kraft paper. It features an inner PE or anti-static lining and a valve filling structure, ensuring strong sealing, high load-bearing capacity, and convenient filling operations.

Specifically designed for bulk powder and granular materials such as carbon black, chemical powders, building materials, feed, fertilizers, and mineral powders, this bag is compatible with automated filling production lines. Its stable stacking and durable transportation minimize damage during handling.

As a preferred product in industrial packaging, the kraft paper valve bag can be fully customized according to customer requirements, material characteristics, and printing needs, offering versatile solutions for various applications.

• Structured Design for Efficient Filling Featuring both internal and external valve designs, this packaging is compatible with fully-automatic and semi-automatic filling machines, enabling rapid filling speed. Once filled, the valve automatically seals without additional stitching or tying, saving time and labor.
• Multi-layer Paper for Strength and Durability Made from thick, virgin kraft paper with a standard 2-4 layer composite structure, the material boasts high toughness and tensile strength. It resists tearing and impact, ensuring durability during long-distance transport and multi-layer stacking.
• Sealed Protection Against Dust, Leaks, and Moisture The inner layer is lined with a PE film that effectively blocks moisture and dust, preventing material clumping and fine powder leakage. Reinforced seams enhance the bag's sealing performance.
• Neat Stacking and Stable Storage The square bottom and three-dimensional forming design ensures a firm, structured bag body that stands upright after filling. This stability allows for neat stacking on pallets without tilting.
• Eco-friendly and Compliant Materials The main body is crafted from kraft paper, an environmentally friendly and odorless material. It is recyclable and meets national environmental standards as well as export packaging requirements.
• Clear Printing for Brand Display The smooth bag surface supports multi-color printing, including logos, company names, and product specifications. The printed text is durable and resistant to fading.

• Carbon Black Industry Solutions for various carbon black types including high pigment, rubber, conductive, acetylene, and spray carbon black. Features anti-static, dustproof, explosion-proof, and leak-proof design suitable for automated filling systems and long-distance transportation.
• Chemical Raw Materials Industry Specialized packaging for fine chemical powders including powder chemical additives, pigments, dyes, resin powders, rubber and plastic fillers, and flame retardants.
• Building Materials and Mineral Industry Suitable for powders and granular materials like talcum powder, calcium carbonate, quartz sand, putty powder, gypsum powder, cement additives, and mineral powders.
• Agricultural and Animal Husbandry Industry Packaging for agricultural materials including compound fertilizers, organic fertilizers, feed additives, veterinary raw materials, and grain powders.
• Other Industrial Fields Accommodates bagged materials such as plastic masterbatches, powder coatings, pharmaceutical intermediates (non-sterile grade), and refractory materials.

• Size and Load Capacity Customization Customized packaging sizes based on material density and loading weight, including specifications for 10kg, 20kg, 25kg, 50kg, and more. Dimensions such as width, length, bag height, and valve diameter can be tailored to integrate with your filling equipment.
• Material and Structure Customization Choose from 2 to 4 layers of kraft paper. Inner liners include standard PE films, while kraft paper options include regular yellow kraft paper, high-strength imported kraft paper, and laminated kraft paper.
• Valve Style Customization Three valve styles available: inner valve, outer valve, and extended valve, suitable for different brands and models of fully automatic or semi-automatic filling machines.
• Printing Customization Custom printed content including company logo, name, product name, specifications, standards, and contact information. Printing methods include single-color, two-color, and multi-color offset printing on front, sides, or near valve positions.
• Packaging and Delivery Customization Options include bundled packaging and palletizing, with flexible delivery arrangements supporting full truck shipments or staged deliveries. Production schedules coordinated with project timelines.