Moisture-Proof PP Woven Fertilizer Sacks | with PE Inner Liner | Leak-Proof & Anti-Hygroscopic | For Urea & Potash Fertilizer

Product Overview: 
This product is a moisture-resistant, PP-woven fertilizer packaging bag with a built-in PE liner, specifically designed for hygroscopic fertilizers such as urea and potash. The outer layer is made of high-strength PP (polypropylene) woven fabric, offering excellent tensile strength and puncture resistance; the inner layer features a composite PE barrier film that effectively prevents water vapor penetration, thereby protecting the fertilizer from caking due to moisture and minimizing nutrient loss. The bag is available in either flat-bottom or valve-style designs and supports custom printing, making it suitable for packaging both granular and powdered fertilizers.

Applicable materials: 
Urea, potash fertilizers (potassium chloride, potassium sulfate), compound fertilizers, phosphate fertilizers, nitrate fertilizers, water-soluble fertilizers, organic fertilizers, bio-organic fertilizers, and other hygroscopic granular or powdered fertilizers.

Core Advantages: 
PE inner liner for moisture resistance; high-strength, puncture-resistant PP weaving for leak-proof and moisture-absorption prevention; suitable for urea and potash fertilizers; resistant to fertilizer corrosion; supports custom printing.

Moisture-proof performance (core): 
PE Liner Film: Features a food-grade PE barrier layer that reduces water vapor transmission by more than 95%.

Laminated Reinforcement: Optional outer lamination for double moisture protection, reducing light transmittance by more than 98%.

Effect: Effectively prevents urea and potash fertilizers from caking due to moisture and nutrient loss, with a shelf life of 12 months or longer.

Leak-proof performance: 
Heat-sealing bottom process: bottom heat sealing, no pinholes, excellent seal integrity.

Integrated PE liner: the inner bag is laminated or co-extruded with the outer bag, eliminating the risk of delamination and leakage.

Drop Test: 50 kg load dropped from a height of 1.2 meters; no breakage or leakage after six-sided drops.

Moisture-proof mechanism: 
Urea, potash fertilizers, and other fertilizers are highly hygroscopic; when exposed to humid air, they rapidly absorb moisture, leading to caking, pulverization, and nutrient loss. This product leverages the high barrier properties of its PE inner liner to isolate the bag’s internal environment from external moisture, thereby effectively extending the fertilizer’s shelf life.

Material and Craftsmanship: 
Outer layer: PP (polypropylene) woven fabric

Inner layer: PE barrier film (liner film, laminated film, or co-extruded liner)

Structure: PP woven fabric + PE inner liner (double-layer composite)

Bag styles: flat pouch / M-seam pouch / square-bottom valve pouch (optional)

Bottom sealing methods: heat-sealed bottom (recommended) / sewn bottom (with sealing strip) / ultrasonic-sealed bottom

Printing: 2 to 7-color rotogravure printing, with vibrant, abrasion-resistant designs.

Characteristics of PP woven fabric: 
High strength: tensile-resistant and puncture-proof, capable of withstanding a load of 25–50 kg.

Tear-resistant: tightly woven, making it difficult to tear along cuts.

Corrosion resistance: Excellent resistance to the chemical components found in urea and potash fertilizers.

Eco-friendly and recyclable: manufactured from virgin PP material

Characteristics of the PE inner liner film: 
High barrier: low water vapor transmission rate, effectively preventing moisture.

Flexibility: fold-resistant and low-temperature resistant

Excellent heat-sealability: compatible with heat-seal bottoming processes.

Tensile strength: 
≥700 N/50 mm (30% above the national standard), suitable for stacking and transporting loads weighing 25 to 50 kg.

Packaging drop test: 
With a 50 kg load, a 1.2-meter free fall, and six-sided drop tests, the product remains intact and leak-proof.

Corrosion resistance grade: 
★★★★★ (Highly resistant to salts, acidic and alkaline components in urea and potash fertilizers)

Custom Printing: 
Printing method: intaglio color printing with lamination, resulting in vibrant colors and excellent abrasion resistance.

Printable content: brand logo, product name, nutrient content (N-P-K), net content, implementation standard number, fertilizer registration certificate number, instructions for use, fertilization recommendations, warning labels (“keep dry,” “protect from sunlight,” “not for chlorine-sensitive crops”), barcode, QR code.

Special Techniques: Local UV Coating, Gold Foil Stamping, Anti-Counterfeiting Printing

Sealing method (after filling): 
Recommendation: Heat-sealing (heat-sealed to a PE liner for excellent sealing performance)

Optional: thread-sealing closure (requires sealing strip) or ultrasonic sealing.

Applicable filling method: 
Spiral filling machine, impeller filling machine, airflow filling machine, gravity filling machine, manual filling

Environmental Compliance: 
Made from virgin PP and PE materials; recyclable. Supports hazardous packaging export certification.

Applicable to: 
Urea producers, potash fertilizer processors, compound fertilizer manufacturers, hygroscopic fertilizer producers, and fertilizer exporters.

Price and Minimum Order Quantity: 
Negotiable; inquiries welcome.