1. Basic Material Properties

1. Food-grade options available, odor-freeConventional agricultural bulk bags adopt virgin PP material; grain-specific versions can be manufactured with food-contact-grade raw materials free of pungent recycled material odors, preventing contamination of rice, rapeseed, cereals and other grains.

2. Moderate flexibility and abrasion resistanceResist repeated squeezing and friction during loading/unloading, stacking and frequent sun-drying operations, and are not prone to cracking, suiting frequent turnover on farms and grain depots.

3. Moderate resistance to weak acids and alkalisCompatible with compound fertilizers, urea, organic fertilizers and fermented manure; resistant to corrosion and aging from fertilizer salts during short-term contact.

4. Stable temperature adaptabilityStable under normal storage and transportation temperatures. Outdoor sun-resistant grades are formulated with UV stabilizers to avoid rapid aging and pulverization under prolonged field exposure.

2. Two Core Differentiated Features: Breathability & Moisture Proofing (Critical for Agricultural Use)

(1) Breathable Bulk Bags (Mainstream for Grain Sunning & Stockpiling)

• Natural ventilation through woven gaps; semi-permeable or loosely woven customized versions are available to dissipate respiratory heat and moisture from grains, preventing mildew, overheating and sprouting of newly harvested high-moisture grains during temporary stockpiling and natural drying in fields.

• Ideal for temporary field grain storage and moisture reduction via natural ventilation.

(2) Laminated / Lined Airtight & Moisture-Proof Bulk Bags

• Constructed with outer PP woven fabric plus inner PE film liner or external coating for complete water and moisture barrier performance.

• Used for finished dry grain, seeds and fertilizers to prevent moisture absorption, caking and deterioration, suitable for warehouse storage in rainy seasons.

3. Leak-proof, Insect-proof & Dust-suppression Properties

1. High-density weaving prevents leakage of grains and fine seedsTightly woven base fabric is adopted for fine grains, rapeseed, sesame and powdered feed to stop particles leaking through warp and weft gaps and reduce material loss.

2. Inner liner prevents pest infestationInternal plastic liners block insect eggs, rodents and pests from penetrating, lowering grain loss caused by moth and pest damage; drawstring sealing design is available for customization.

3. Dust suppression: reduces dust dispersion during transfer of chemical fertilizers and powdered feed materials.

4. Structural, Lifting & Load-bearing Characteristics

1. Common load capacityMain loading capacity ranges from 0.5 ton to 1.5 tons; extra-large-volume options reach 2 tons, with a standard safety factor of 5:1, compatible with forklift, crane and overhead hoist lifting and palletized warehousing.

2. Diversified lifting loop designs

• Four-loop full-bottom construction: designed for mechanized lifting and transshipment in warehouses;

• Small simple lifting tabs or tying straps: cost-effective for manual loading and trucking by individual farmers.

3. Custom bag styles tailored for agricultural scenarios

• Open-top flat-bottom type: easy filling and dumping for corn, wheat, rice, crushed straw and bulk materials;

• Top filling spout + bottom discharge spout: adapted for automated filling and unloading in grain depot assembly line operations;

• Drawstring closure: bag opening can be tightened after filling to prevent grain loss from sparrows, rainwater and dust contamination.

4. Dense stitching prevents bag burstingEnhanced dense stitching on bag bodies and bottoms to resist bulging from self-weight of grain and avoid seam splitting under stacked pressure.

5. Stacking & Operational Advantages

1. Rigid filled shape for stable stackingMaintains neat cubic shape after filling, enabling multi-layer stable stacking in grain depots to save warehouse space.

2. Foldable empty bags for space-efficient storageConvenient folding for idle storage, lowering bulk storage costs for farmers and cooperatives; reusable for 3 to 8 cycles.

3. High loading & unloading efficiencyReplaces dozens of small woven bags, greatly boosting loading, warehousing and grain-dumping efficiency while cutting labor costs.

6. Typical Applicable Materials

• Grains: Corn, wheat, rice, soybeans, peanuts, rapeseeds, coarse cereals, sorghum

• Agricultural inputs: Urea, compound fertilizer, organic fertilizer, microbial fertilizer, feed raw materials, soybean meal, wheat bran

• Agricultural by-products: Wood chips, rice husks, crushed straw, cotton seeds, dried nuts, etc.