High Tear Resistance Kraft Paper Valve Bags with Moisture-Proof Lining and Customizable Sizes for Industrial Packaging
Price:
Negotiable
MOQ:
10000
Delivery Time:
30days
Brand:
HUAYUAN
Product Description
High Moisture Resistance Paper Valve Bags
Using natural brown or white kraft paper with valve closure designed for automatic filling
Product Overview
The kraft paper valve bag is a specialized packaging solution designed specifically for ultra-fine powders, chemical powders, and building material granules. This fully automatic filling packaging system ensures efficient and precise packaging, catering to the demanding needs of these industries.
Manufactured using a multilayer high-strength virgin kraft paper composite inner film process, the bag provides excellent durability and protection. The valve bag features a square bottom valve structure, which effectively replaces traditional open-mouth bags, offering enhanced convenience and improved sealing performance.
Currently, this type of packaging has become the mainstream standardized choice across several industries, including carbon black, white carbon black, titanium dioxide, pigments, additives, and building material powders.
Key Features
- Valve Mouth Self-Sealing and Zero Dust Leakage: Inner and outer valves are precisely compatible with fully automatic filling equipment. After filling, air pressure automatically seals the valve, eliminating manual sealing and preventing powder dust, leakage, and contamination.
- Stable Stackable Three-Dimensional Square Bottom: Integrally formed square bottom maintains firm, upright shape. Even load distribution prevents tilting or collapsing, ideal for high-level warehouse storage and container sea transportation.
- Multi-layer Thickened Material with Strong Impact Resistance: Made from 2 to 4 layers of full wood pulp stretch kraft paper with high tensile strength and toughness. Resists tearing and punctures during long-distance transport and handling.
- Moisture-Proof Lining to Prevent Caking and Deterioration: Food-grade PE moisture-proof inner membrane isolates air, water vapor, and humidity. Prevents ultrafine powders from absorbing moisture, caking, discoloring, or losing performance.
- Compatible with High-Speed Automated Production: Uniform shape and hardness with precisely fitting valve mouth compatible with various domestic and international powder automatic filling machines.
- Clear Printing and High Brand Recognition: Supports high-definition flexographic and full-page printing for company logos, product models, net weight, standards, and export labels.
Technical Parameters
| Parameter | Specifications |
|---|---|
| Paper Layers | 2-layer, 3-layer, and 4-layer options using native kraft paper (80-100 g/m²) |
| Inner Lining | Standard PE moisture-resistant, anti-static PE, or high barrier aluminum foil inner film |
| Bag Bottom | Square glued bottom formed integrally with double-layer heat seal reinforcement |
| Valve Options | Internal valve (mainstream), external valve, and extended valve for high-capacity production |
| Dimension Tolerances | ±5mm for length, width, and height |
| Print Quality | Precise color registration without ghosting, missing prints, or dirty spots |
| Sealing Standards | Tight and secure valve closure with no light transmission, powder leakage, or gaps |
Industry Applications
- Chemical Powder Industry: Carbon black (high-pigment, conductive, acetylene, rubber carbon black), fumed silica, titanium dioxide, zinc oxide, nano powders, chemical fillers, and additive powders
- Pigment and Coating Industry: Iron oxide pigments, organic pigments, pearl powder, wax powder, matting powder, and color masterbatch powders with moisture protection and color lock features
- Building Material Dry Powder Industry: Tile adhesive, putty powder, dry mortar, gypsum powder, heavy calcium carbonate, talcum powder, and insulation powders with stable stacking and high load-bearing capacity
- Rubber and Plastics Industry: Rubber reinforcing powders, plastic fillers, and modified powders with anti-static and dust-proof features for automated feeding systems
Customization Options
- Specification Customization: Standard sizes of 10kg, 20kg, and 25kg. Custom sizes from 5kg to 50kg and special bag types available
- Material and Process Customization:
- Standard Version: Multi-layer kraft paper with PE moisture-proof inner lining
- Anti-Static Version: Multi-layer kraft paper with anti-static inner lining for carbon black and nano powders
- Printing Customization: 1 to 4-color high-definition flexography for corporate logos, company names, product models, net weight, batch numbers, standards compliance, shipping marks, English versions, QR codes, and contact information
- Detail Customization: Extended valve openings, reinforced bag bottoms, full lamination for waterproofing, anti-slip surfaces, special breathable designs, customized hardness, and gram weight adjustments
Similar Products
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