Self-sealing Valve Kraft Paper Valve Bags with High Tear Resistance and Recyclable Biodegradable Design for Heavy Duty Packaging
Price:
Negotiable
MOQ:
10000
Delivery Time:
30days
Brand:
HUAYUAN
Product Description
Self-sealing Valve Kraft Paper Valve Bags
Kraft paper valve bags are specially designed for fully automatic filling and packaging of ultra-fine powders, chemical powders, and building material granules. This innovative packaging solution is engineered to meet the specific needs of these industries with high efficiency and reliability.
Constructed using a multi-layer, high-strength, virgin kraft paper combined with an inner laminated film, the bags ensure durability and excellent protection of the contents. The incorporation of a square bottom valve structure provides enhanced stability and ease of handling during the filling process.
Replacing traditional open-mouth bags, kraft paper valve bags have become the mainstream standardized packaging choice in industries such as carbon black, silica, titanium dioxide, pigments, additives, and building materials powders. Their design optimizes automated filling operations while maintaining product integrity.
Key Features
- Self-sealing Valve: Zero powder dust leakage with built-in or external valves compatible with automatic filling equipment. Automatic closure with air pressure eliminates manual sealing.
- Square Bottom Stability: Three-dimensional square bottom provides outstanding stacking stability without package collapse, ideal for warehouse storage and container shipping.
- Reinforced Construction: Multiple layers of reinforced paper (2-4 layers) offer excellent resistance to impact, tearing, and puncturing for durable transport handling.
- Moisture Protection: Food-grade PE moisture-proof inner lining prevents moisture absorption, clumping, color fading, and performance degradation.
- Automation Ready: Regular shape, uniform hardness, and accurate valve positioning compatible with domestic and international powder filling machines.
- Brand Enhancement: High-definition flexographic and full-surface printing for company logos, product information, and export labels.
Technical Specifications
| Parameter | Specifications |
|---|---|
| Paper Layers | 2, 3, or 4 layers of native kraft paper (80-100 gsm) |
| Inner Membrane | Standard PE moisture-proof, anti-static PE, or high-barrier aluminum foil |
| Bag Bottom | Square glued bottom integrated molding with double-layer reinforced heat sealing |
| Valve Types | Inner valve (mainstream), outer valve, and extended valve options |
| Size Tolerance | ±5mm for length, width, and height |
| Printing Quality | Precise color registration, no shadowing, missing prints, or smudges |
| Sealing Standards | Tight valve closure with no light permeability or powder leakage |
Industry Applications
- Chemical Powder Industry: Carbon black, fumed silica, titanium dioxide, zinc oxide, nano powders, chemical fillers, and additive powders
- Pigment and Coating Industry: Iron oxide pigments, organic pigments, pearlescent powders, wax powders, matting powders, and color masterbatch powders
- Building Material Dry Powder Industry: Tile adhesive, putty powder, dry mortar, gypsum powder, heavy calcium carbonate, talcum powder, and insulation powders
- Rubber and Plastics Industry: Rubber reinforcing powders, plastic fillers, and modified powders with anti-static and dust-proof properties
Customization Options
- Size Customization: Standard sizes of 10kg, 20kg, and 25kg; custom sizes from 5kg to 50kg available
- Material and Process: Standard version (multi-layer kraft paper with PE moisture-proof inner film) or explosion-proof version (anti-static inner membrane)
- Printing Customization: High-definition flexographic printing with 1-4 colors for logos, product information, compliance standards, and export labels
- Detail Customization: Extended valve openings, reinforced bag bottoms, waterproof lamination, anti-slip surfaces, breathable designs, and tailored hardness/weight
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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