Compound chemical fertilizers—including NPK formulations (Nitrogen, Phosphorus, Potassium), ammonium sulfate, calcium nitrate, and soluble micronutrients in 2026—are high-value, chemically aggressive, and intensely hygroscopic commodities. When stored in standard untreated sacks exposed to direct sunlight on open farm fields or humid seaport container yards, solar radiation causes rapid polymer photodegradation, weave embrittlement, moisture ingress, and severe fertilizer caking. SherkatTrade manufactures heavy-duty UV Treated Laminated NPK Fertilizer Polypropylene (PP) Sacks at our specialized polymer textile facility in Isfahan, combining active chemical barrier protection with extreme weather resistance.
Produced from pure virgin polypropylene resins compounded with 3% to 5% high-grade hindered amine light stabilizers (HALS UV masterbatch) and coated with a seamless PE/PP extrusion laminate layer, our fertilizer sacks maintain their full tensile burst strength for over 12 months under harsh tropical sunlight and outdoor agricultural storage without fraying or tearing.
Every production lot is subjected to QUV accelerated weathering tests, acid-alkali corrosion endurance, and drop impact evaluations:
| Agricultural Commodity | Common Storage Vulnerability | Strategic Solution of SherkatTrade UV Sacks |
|---|---|---|
| Granular NPK Compounds | Ambient humidity absorption causing hard cake formation | Impermeable extrusion laminate barrier preventing moisture ingress |
| Water-Soluble Powders (100% Soluble) | Fine dust sifting and rapid hydration | Ultra-tight weave combined with hermetic dust-proof seam sealing |
| Nitrates & Sulfates | Chemical degradation and acidic fiber corrosion | 100% pure virgin polymer formulation chemically inert to salts |
| Humic Acids & Organic Blends | Loss of biological efficacy under solar heat | High-concentration UV stabilizers preventing photochemical breakdown |
Integrated UV absorbers prevent polymer chain scission from sunlight, ensuring bags do not tear open when lifted by farmers months after delivery.
By blocking moisture and air penetration, the active N-P-K nutrient ratios and microelements remain potent without nitrogen volatilization.
Enables safe multi-tier pallet storage in open customs yards and unshaded agricultural supply depots without risk of sack disintegration.
Vibrant, gloss-laminated graphics showcase nutrient formulas (such as 20-20-20, 10-52-10, or 12-12-36) clearly, commanding premium brand trust.
| Quality Parameter | SherkatTrade UV Treated NPK Sack | Standard Market PP Bag | Cheap Recycled Plastic Bag |
|---|---|---|---|
| Sunlight & UV Endurance | > 12 Months direct outdoor sun | Becomes brittle in < 2 months | Disintegrates in < 20 days |
| Moisture & Water Barrier | 100% Laminated waterproof seal | Weave pores absorb humidity | Rain penetrates, dissolving fertilizer |
| Chemical Resistance | 100% Chemically inert | Acids weaken and fray fibers | Severe discoloration and fiber rot |
| Bottom Seam Reliability | Double stitch with felt filler | Single stitch with powder sifting | Seam opens under 50kg load |
| Fertilizer Spoilage Rate | 0% Loss (bone dry) | 10% to 25% caking loss | Complete cargo loss & customer returns |
No, the UV stabilizers are permanently encapsulated within the extruded polymer molecular structure and are chemically inert.
Custom-printed orders with your brand graphics up to 6 colors start from 3,000 bags.
Yes, our sacks feature precision heat-cut open mouths with anti-static treatment for smooth automated bag-hanging operations.
Contact the SherkatTrade agrochemical packaging export department for technical datasheets, physical sample packs, and firm volume quotations:
| Dimensions | 60x95 cm |
| Weight per Bag | 80g - 100g |
| Material | UV-Stabilized Virgin PP |
| Color | Yellow |
| Printing Type | Flexographic Printing |
| Load Capacity | 50 kg |
| Closure Type | Double Sewn Bottom |
| UV Treatment | Yes |
| Food Grade | No |
| Custom Size Available | Yes |
