1. Clarify the purpose
Loading material types: such as seeds, grains, fertilizers, feed, vegetables, etc. Different materials have different requirements for moisture resistance, breathability, and sealing of the bag.
Storage and transportation conditions: Is it stored outdoors? Do you need long-distance transportation? Do you need to stack them?
2. Materials and Craftsmanship
Material:
Polypropylene (PP): the most common, acid and alkali resistant, moisture-proof, but weak in UV resistance, suitable for short-term indoor storage.
Polyethylene (PE): Better flexibility and low temperature resistance.
Film coating or coating process: increases moisture-proof and waterproof performance, suitable for damp environments or materials that require waterproofing.
Weaving density: The higher the density (such as ≥ 100 x 100 strands/10cm), the better the load-bearing and leak proof properties.
UV resistant treatment: If used outdoors, bags with added UV resistant agents must be selected to prevent aging and cracking.
3. Load bearing and specifications
Load bearing capacity: The common load-bearing capacity is 0.5-2 tons, which needs to be selected according to the actual loading weight and leave a margin (such as selecting 1.5 tons of load-bearing capacity for 1 ton of material).
Size specifications: Standard sizes such as 90 × 90 × 100cm can be customized according to the size of storage and transportation vehicles (such as trucks and containers).
Strap design:
Number of straps: usually 4, with strong load-bearing capacity; 2 pieces are suitable for lightweight materials.
Strap width and stitching process: Wide straps (≥ 5cm) and reinforced stitching are safer.
4. Functional design
Unloading port:
Bottom discharge port: convenient for unloading, can be circular or square, pay attention to the caliber size (usually 15-50cm).
Top loading port: with zip ties or sealing covers to ensure sealing.
Breathability: When storing heat generating materials such as grains and seeds, you can choose sidewall breathable mesh or breathable fabric.
Leak proof design: Inner lining bag (PE inner bag) or bottom reinforcement layer, suitable for powder or fine particle materials.
5. Safety certification and quality
Certification standard: Select products that comply with GB/T 10454-2000 (Chinese standard) or ISO 21898 (international standard).
Quality inspection: Pay attention to reports on sling tension testing, lateral compression testing, drop testing, etc.
Manufacturer qualification: Choose a legitimate manufacturer and check if there are export certifications (such as CE, FDA food grade requirements).
6. Special needs
Food grade requirements: When loading feed or grain, food grade raw materials (non-toxic, odorless) must be selected.
Anti static: When used in flammable environments such as chemical fertilizers, anti-static design is required.
Customized printing: capable of printing logos, usage instructions, brand logos, etc.
7. Cost and Durability
Disposable vs Reusable:
Disposable bags are thinner and suitable for short-term transportation.
Reusable bags require thicker materials and reinforced straps, with a high unit price but low long-term costs.
Anti aging property: UV treatment bag is required for outdoor use, although the cost increases, the service life is longer.
8. Common Misconceptions Reminder
Don't choose based solely on price: low-priced bags may cut corners and be prone to damage, resulting in material loss or safety accidents.
Avoid overloading: Use strictly according to the load-bearing capacity, overloading may cause the sling to break.
Outdoor storage precautions: Even with UV treatment, long-term exposure to sunlight can shorten the lifespan. It is recommended to cover with a sunshade.
Summary of the purchasing process
Determine the purpose → 2 Select Material and Craftsmanship → 3 Match load-bearing capacity and size → 4 Check functional design → 5 Verify security authentication → 6 Evaluate cost and durability → 7 Choose a reliable supplier.
Recommended supplier types
Large scale chemical enterprise cooperative manufacturers (such as downstream enterprises of Sinopec).
Professional container bag manufacturer (with ISO certification and testing capabilities).
E-commerce platforms (such as Alibaba) screen strong merchants, view customer reviews and testing reports.
By following the above steps, safe, economical, and suitable agricultural container bags can be selected. If there are specific usage scenarios (such as fertilizer transportation, grain storage, etc.), the selection can be further refined!
