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| Customization: | Available |
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| Industrial Use: | Pharmaceutical, Apparel, Agriculture, Chemical |
| Transparency: | Opaque |
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Product Name: Multi-layer Kraft Paper Valve Bags for Powder Packaging
1. Product Overview
Our Multi-layer Kraft Paper Valve Bags are premium industrial packaging solutions designed for efficient filling and secure storage of granular and powdery materials. Featuring an integrated valve structure, these bags are ideal for automatic filling lines, offering excellent sift-proof properties and high load capacity. Made from high-quality virgin kraft paper, they provide outstanding tear resistance and stackability, ensuring your products reach customers in perfect condition.
2. Key Features
Valve Design: Equipped with a self-sealing valve (available in pasted or sewn type), allowing for high-speed automatic filling and minimal dust escape.
Material Composition: Constructed from 2-4 plies of virgin or recycled kraft paper. An optional inner PE liner or lamination is available for moisture-proof and oil-proof requirements.
Bottom Style: Available in both Block Bottom (square) and Pinch Bottom designs, providing excellent stability for palletizing and transportation.
Printing: Supports high-quality flexographic printing (up to 4 colors) to display your brand logo and product information vividly.
Eco-Friendly: Fully recyclable and biodegradable, meeting modern environmental standards.
3. Technical Specifications
| Parameter | Details |
|---|---|
| Material | 100% Virgin Kraft Paper / Recycled Kraft Paper + Optional PE Liner |
| Ply (Layers) | 2 Ply / 3 Ply / 4 Ply (Customized) |
| Valve Type | Pasted Valve / Sewn Valve / PE Valve |
| Bottom Type | Block Bottom (Square) / Pinch Bottom |
| Paper Grammage | 70gsm - 100gsm per ply |
| Width | 35cm - 60cm (Customized) |
| Length | 45cm - 90cm (Customized) |
| Valve Length | 10cm - 15cm (Customized) |
| Printing | Flexo Printing (1-4 Colors) |
| Feature | Moisture Proof / Leak Proof / High Tensile Strength |
4. Applications
These valve bags are widely used for packaging in various industries:
Building Materials: Cement, Dry Mortar, Putty Powder, Plaster, Gypsum.
Chemicals: Carbon Black, Titanium Dioxide, Calcium Carbonate, Resin, Pigments.
Food & Agriculture: Flour, Sugar, Animal Feed, Grain, Starch.
Minerals: Silica Sand, Bentonite, Abrasives.
5. Why Choose Us
Customization: We offer tailor-made solutions regarding size, printing, material ply, and valve type to meet your specific product needs.
Quality Control: Strict inspection from raw material to finished products ensures consistent quality and dimensional accuracy, guaranteeing smooth running on your automatic packing machines.
Factory Direct: As a direct manufacturer, we provide competitive prices and reliable supply capacity.
Q1: What is the MOQ for custom printed valve bags?
A: For custom printed designs, our MOQ is typically 20,000 pieces. However, for first-time cooperation, we can discuss a smaller trial order quantity. Please contact us with your details.
Q2: What materials are your paper valve bags made of?
A: Our paper valve bags are mainly made from high-quality Virgin Kraft Paper . We can also add an inner PE liner or lamination for moisture resistance, depending on your product requirements.
Q3: Can I get different ply (layer) options?
A: Yes, we offer various ply options ranging from 2-ply to 6-ply. The most common for cement and chemical powders are 3-ply and 4-ply bags. You can choose based on the weight and abrasiveness of your products.
Q4: What is the difference between a pasted valve and a sewn valve?
A: A pasted valve uses adhesive to seal the valve, providing better sift-proof properties for fine powders. A sewn valve is stitched closed, which is generally stronger for heavier materials but may have tiny needle holes. We can provide both based on your needs.
Q5: Can you print my logo on the bags? What printing methods do you use?
A: Yes, we offer custom printing services. We typically use Flexo Printing (for cost-effective, large-area color) and Offset Printing (for high-definition, detailed designs). We can print up to 4-6 colors depending on the design.
Q6: Do you provide free samples?
A: Yes, we can provide existing stock samples for free. You only need to pay the express shipping cost (e.g., DHL, FedEx, UPS). For customized samples that need to be produced, there will be a sample charge, which will be deducted from the mass production cost.
Q7: How do you handle the pricing?
A: The price is mainly based on factors like: Material, Ply (layers), Size (width/length), Valve type, and Printing. Please provide us with your detailed specifications, and we will quote you the best price within 24 hours.
Q8: How do you pack the valve bags for shipping?
A: To ensure safe transportation, the bags are packed in strong export pallets or cartons, wrapped with stretch film to keep them dry and clean during the sea voyage. We can also pack them according to your special requirements.
Q9: What is the lead time?
A: For stock orders, we can ship within 7-10 days after payment. For custom orders, the typical production lead time is 20-25 days after sample approval and down payment confirmation.
Q10: Are your paper valve bags suitable for automatic filling machines?
A: Absolutely. Our valve bags are designed with precise valve positioning and consistent dimensions to run smoothly on most automatic valve filling lines (such as those for cement or dry mortar). We can also customize the valve sleeve length to match your machine.
If you have any other questions, please feel free to Contact Us or send an inquiry directly.
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