Kraft Paper Woven Valve Bag

This kraft paper woven valve bag is a high-strength industrial packaging bag, featuring a multi-layered composite structure of an outer kraft paper layer and an inner polypropylene (PP) woven fabric layer. It is specifically designed to meet the stringent packaging requirements of bulk powders and granular materials.

This product perfectly combines the advantages of woven fabric's high tensile strength and tear resistance with the advantages of kraft paper's good printability, moisture resistance, and dust resistance. It can be widely used for the reliable storage and transportation of cement, chemicals, fertilizers, mineral powders, and other powders.

The convenient valve design supports fast, dust-free, and high-speed filling, and is compatible with various automated packaging production lines; the flat bottom structure ensures stable stacking and significantly saves storage and transportation space.

Kraft paper woven valve bag product parameters

Features and Applications

Product Features:

· Multi-layer composite structure: The combination of an outer kraft paper layer and an inner PP woven fabric layer ensures both excellent printing quality and superior mechanical strength.

· High load-bearing capacity: A single bag can bear a maximum weight of 50kg, suitable for heavy industrial materials such as cement, sand, gravel, and mineral powder.

· Excellent moisture and dust protection: The outer kraft paper layer, with optional PE lamination, provides excellent moisture and dust protection during storage and transportation.

· Convenient valve filling: The valve design supports fast, clean, and high-speed filling, effectively reducing labor costs.

· Stable stacking and space saving: The flat, sealed bottom ensures stable upright storage, optimizing warehouse storage and transportation space utilization.

· Custom printing support: Up to 6-color flexographic printing enhances brand recognition, product identification, and anti-counterfeiting capabilities.

· Tear and puncture resistant: The inner woven fabric layer effectively prevents damage and bursting during handling and long-distance transportation.

Application Areas:

· Building Materials Industry: Cement, dry-mixed mortar, putty powder, gypsum, mortar powder, sand, tile adhesive

· Chemical Industry: Chemical powders, pigments, dyes, plastic additives, resins

· Agriculture Industry: Fertilizers, compound fertilizers, soil conditioners, seeds, feed

· Mining Industry: Calcium carbonate, talc, bentonite, kaolin, lime powder

· Plastics Industry: PP/PE/PVC resins, masterbatches, recycled plastic granules, filler powders

· Food Industry: Flour, starch, sugar, salt, milk powder, food additives

· Other Fields: Various free-flowing powdery and granular industrial materials

Why Choose Us

Factory direct sales, competitive pricing: Direct supply from the factory eliminates middlemen, saving you 10%–15% on procurement costs for the same quality. Tiered pricing is available for bulk orders.

Full-process customization service: OEM/ODM supported. From size, weight, color, printing patterns to valve structure, everything can be customized to your needs. Free design suggestions and sampling services are provided.

Fast and reliable delivery: Regular orders are delivered in 15–25 days, with an on-time delivery rate of up to 99%, ensuring worry-free production planning.

Professional team, 24/7 response: An experienced sales and technical team is online 24/7, quickly responding to inquiries, answering technical questions, and tracking orders until safe arrival at port.

FAQ

Q1: What is the minimum order quantity (MOQ) for kraft paper woven valve bags?

A: The standard MOQ is 10,000 pcs, but the exact amount depends on the specifications. For first-time cooperation, a small trial order can be negotiated to help you test the market before increasing volume.

Q2: Can the size, color, and printing be customized?

A: Absolutely. Printing can be customized to your needs.

Q3: Do you provide free samples?

A: Yes, we provide free samples for you to inspect the quality; you only need to bear the shipping cost. The sample fee will be refunded after confirmation of a large order.

Q4: What is the delivery time for regular orders?

A: Delivery within 15–25 days after receiving the deposit; the specific delivery date will be confirmed in writing upon order confirmation.

Q5: What is the difference between valve bags and open bags?

A: Valve bags have a self-sealing valve at the corner, which can be directly connected to automatic filling equipment. After filling, the material inside the bag is automatically sealed, which is fast and prevents dust leakage. Open bags require resealing after filling, which is less efficient and has higher labor costs. 

Q6: What is the function of the inner woven bag?

A: The inner PP woven fabric is the "skeleton" of the bag, providing high tensile strength, tear resistance, and puncture resistance. It prevents damage and bursting during handling, stacking, and long-distance transportation, while also protecting the outer kraft paper from scratches by sharp materials.

Q7: What is the maximum load-bearing capacity?

A: Standard sizes support 25kg, 40kg, and 50kg load-bearing capacity. Customization is available to meet your filling needs.

Q8: Do you support OEM/ODM?

A: Yes. We can customize logo printing, bag specifications, packaging methods, and valve structure according to your brand design, and provide professional structural design advice.

Q9: What are the payment terms?

A: Standard payment is 30% deposit via T/T, with the remaining 70% due before shipment.