Strong Tear Resistance Kraft Paper Valve Bag with High Moisture Resistance and Up To 50 Kg Weight Capacity for Industrial Packaging
Price:
Negotiable
MOQ:
10000
Delivery Time:
30days
Brand:
HUAYUAN
Product Description
Strong Tear Resistance Multiwall Paper Valve Bags
Suitable for industrial packaging up to 50 kg weight capacity with exceptional durability and performance.
Product Overview
The kraft paper valve bag, also known as the block bottom valve bag or square bottom valve bag, is a premium packaging solution specifically designed for industrial powders and granular materials. Manufactured using a multi-layer composite process with high-strength virgin kraft paper and featuring a fully automatic self-sealing valve structure, this bag forms a neat, sturdy rectangular shape when filled, ensuring stable stacking and excellent sealing performance.
Ideal for integration with automated high-speed filling production lines, this packaging solution is widely utilized across construction materials, chemicals, agricultural supplies, and food sectors. With three core advantages—high strength, superior adaptability, and environmentally friendly recyclability—it effectively addresses common industry challenges including bag rupture, powder leakage, stack collapse, inefficient filling processes, and excessive storage space usage.
Key Features
- Stable Structure and Excellent Stacking Performance: Reinforced square bottom shaping maintains straight, squared shape after filling. Prevents slippage and collapse, allowing higher stacking layers and enhanced space utilization.
- Self-Sealing Valve for Efficient and Dust-Free Filling: Compatible with automated powder filling equipment. Automatically seals by material weight, eliminating manual stitching or heat sealing. Improves filling efficiency by more than 40%.
- Multi-Layer Thickening for Enhanced Durability: 2 to 4 layers of virgin high-strength kraft paper composite structure. Resists stretching, puncturing, and dropping. Reliably holds materials weighing 10 to 50 kg.
- Breathable and Explosion-Proof Design: Customizable precision breathable holes quickly release trapped air during filling. Compatible with various advanced automatic filling machines.
- Environmentally Friendly and Compliant: Pure kraft paper material without harmful additives. 100% recyclable and naturally biodegradable. Complies with EU packaging directives and domestic standards.
- Lightweight and Space-Saving: Empty bags fold flat for storage, resulting in compact shipment volume. Effectively reduces logistics and storage costs.
Technical Specifications
| Parameter | Specification |
|---|---|
| Paper Material | High-quality virgin wood pulp stretch kraft paper, single layer weight 70-120 g/m², consistent thickness and uniform texture. Complies with ISO 536 standards. |
| Valve Types | Internal valves (mainstream, automatic self-sealing) and external valves (customized for manual filling). Valve width 10-13 cm for tight seal preventing powder leakage. |
| Bottom Construction | High-temperature glued square base seamlessly pressed and firmly bonded. Guarantees strong adhesion capable of bearing weight without delamination. |
| Ventilation Technology | Optional single-point or multi-point precision ventilation holes providing uniform airflow, preventing powder escape and bag rupture. |
| Protective Features | PE inner liners, single-sided or double-sided waterproof coatings. Offers moisture resistance and prevents fine powder leakage for humid environments. |
Industry Applications
Building Materials Industry: Putty powder, tile adhesive, cement mortar, gypsum powder, lime powder, waterproof powder, joint filler, and bonding agents.
Chemical Industry: Carbon black, white carbon black, talcum powder, heavy calcium powder, bentonite, resin pellets, chemical fillers, pigment powders, and additives.
Agricultural Inputs Industry: Compound fertilizers, organic fertilizers, water-soluble fertilizers, feed powders, and soil conditioners.
Other Industries: Food additive powders, fine mineral powders, refractory materials, and abrasive powders.
Customization Options
Size Customization: Customize width, length, and bottom gusset width to fit materials weighing 10-50 kilograms or special weight requirements.
Material Customization: Choose from 2-4 layers of kraft paper with paper weights 70-120 g/m². Options include PE liners, waterproof coatings, and anti-slip layers.
Process Customization: Internal or external valve options, adjustable ventilation holes, reinforced and thickened designs, and leak-proof upgrades for high-speed filling and long-distance shipping.
Printing Customization: 1-6 color flexographic printing and high-definition printing services for logos, product specifications, net weight, and bilingual Chinese-English export information.
Appearance Customization: Natural kraft paper or white kraft paper with special surface treatments like lamination for distinctive look and enhanced protection.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Xinxiang Huayuan Paper Plastic Bag Co., Ltd.
Location
No.023, Xinchang North Line, Xinxiang Economic and Technological Development Zone, Xinxiang City, Henan Province，China
Contact Person
Huayuan