Frequently Asked Questions

What is an FIBC?

An FIBC (Flexible Intermediate Bulk Container) is a large, flexible container designed for storing and transporting dry, flowable products such as sand, gravel, grain, fertilizer, and chemicals. Commonly referred to as jumbo bags, bulk bags, big bags, or super sacks, these containers have become an industry standard in bulk packaging.

Key Characteristics

• Capacity: Typically holds between 500 kg and 2,000 kg of product
• Material: Made from woven polypropylene fabric
• Dimensions: Common sizes range from 70 cm to 110 cm on each side, with heights from 80 cm to 200 cm
• Lifting: Equipped with lifting loops for easy handling by forklifts or cranes

Common Applications

FIBCs are widely used across many industries:

1. Agriculture — grains, seeds, animal feed
2. Construction — cement, sand, gravel
3. Chemical — powders, granules, resins
4. Food — flour, sugar, starch, rice
5. Mining — minerals, ores

Benefits of Using FIBCs

• Cost-effective compared to rigid containers
• Space-efficient — collapsible when empty, reducing storage and return shipping costs
• Customizable — available in various sizes, coatings, and configurations
• Durable — resistant to moisture, UV exposure, and mechanical stress
• Recyclable — polypropylene material can be recycled after use

Whether you are packaging agricultural products or industrial chemicals, FIBCs offer a reliable and economical bulk packaging solution.

FIBC Certifications and Compliance

Our FIBC bags are manufactured under strict quality management systems and hold multiple international certifications that verify our commitment to quality, safety, and regulatory compliance.

Quality Management Certifications

ISO 9001:2015

Our manufacturing facility operates under an ISO 9001 certified quality management system, ensuring:

• Consistent product quality across all production runs
• Documented procedures for every stage of manufacturing
• Continuous improvement processes
• Regular internal and external audits

ISO 22000:2018

For food-grade FIBCs, we maintain ISO 22000 food safety management certification, covering:

• Hazard analysis and critical control points (HACCP)
• Food safety risk management
• Traceability of raw materials and finished products
• Hygiene and sanitation protocols

Industry-Specific Certifications

Certification	Scope	Relevance
CIFA	China International Freight Forwarders Association	Export and logistics compliance
BRC	British Retail Consortium	Food safety and quality for retail supply chains
UN Certification	United Nations	Dangerous goods packaging (UN bags)

Food Safety Compliance

Our food-grade FIBCs comply with:

• FDA (Food and Drug Administration) — Title 21 CFR requirements for food contact materials
• EU Regulation 1935/2004 — European framework for materials in contact with food
• EFSA guidelines — European Food Safety Authority standards

Food-grade bags are manufactured in dedicated production areas with:

• Food-safe polypropylene resin
• Non-toxic inks and additives
• Cleanroom-style manufacturing environment
• Full batch traceability

Dangerous Goods Packaging

For hazardous materials, we offer UN-certified FIBCs that comply with:

• UN Recommendations on the Transport of Dangerous Goods
• IMDG Code (International Maritime Dangerous Goods)
• ADR (European Agreement concerning the International Carriage of Dangerous Goods by Road)
• IATA DGR (International Air Transport Association Dangerous Goods Regulations)

Testing Standards

All FIBCs are tested in accordance with:

• ISO 21898:2004 — FIBC design and testing standard
• EN 1898:2000 — European FIBC standard
• ASTM D6619 — Standard specification for FIBCs

Documentation and Traceability

Every batch of FIBCs we produce comes with:

• Certificate of conformity
• Test reports for safety factor and SWL verification
• Material traceability documentation
• UV resistance test results (when applicable)

Our commitment to certification and compliance ensures that every FIBC bag we deliver meets the highest standards of quality and safety for your specific application.

Understanding Safe Working Load (SWL)

SWL stands for Safe Working Load, which is the maximum weight an FIBC bag is designed and certified to carry safely under normal conditions. It is one of the most critical specifications to consider when selecting an FIBC for your application.

Standard SWL Ratings

SWL Rating	Common Uses
500 kg	Light agricultural products, fine powders
750 kg	Feed, seeds, granular chemicals
1,000 kg	Standard industrial applications
1,250 kg	Heavy granular materials
1,500 kg	Dense minerals, metal powders
2,000 kg	Aggregates, heavy industrial materials

How SWL is Determined

The SWL is established through rigorous testing that includes:

1. Top lift testing — the bag is filled to its rated capacity and lifted to verify structural integrity
2. Drop testing — filled bags are dropped from a specified height to ensure no failure
3. Stacking testing — bags are stacked to simulate warehouse storage conditions
4. Cyclic lift testing — repeated lifting to verify durability over multiple uses

SWL vs. Safety Factor

The SWL works in conjunction with the safety factor. For example:

• A bag rated at 1,000 kg SWL with a 5:1 safety factor must withstand 5,000 kg before failure
• A bag rated at 1,000 kg SWL with a 6:1 safety factor must withstand 6,000 kg before failure

Important Considerations

• Never exceed the rated SWL of an FIBC
• Check the SWL label on each bag before use
• Environmental factors such as temperature and humidity can affect performance
• Damaged or degraded bags should not be used at any load

Selecting the correct SWL ensures safe handling, transport, and storage of your bulk materials.

FIBC Material Composition

FIBC bags are primarily manufactured from woven polypropylene (PP), a versatile thermoplastic polymer that offers an excellent balance of strength, durability, and cost-effectiveness for bulk packaging applications.

What is Polypropylene?

Polypropylene is a thermoplastic polymer derived from propylene monomer. It is one of the most widely used plastics in the world, known for its:

• High tensile strength — resists stretching and tearing
• Chemical resistance — withstands exposure to acids, alkalis, and solvents
• Moisture resistance — does not absorb water
• Light weight — reduces shipping costs
• Recyclability — PP resin code 5 is widely recyclable

The Manufacturing Process

1. Extrusion — polypropylene resin is melted and extruded into flat tapes or circular yarns
2. Weaving — the tapes/yarns are woven on circular or flat looms to create fabric
3. Coating (optional) — a layer of laminated PP film may be applied for moisture barrier properties
4. Cutting and sewing — the fabric is cut to size and sewn into bag shapes
5. Printing (optional) — custom logos, branding, and handling instructions are applied

Fabric Specifications

Property	Typical Range
Fabric weight	100–250 g/m²
Tape width	1.5–3.0 mm
Tape thickness	0.03–0.06 mm
Weave density	8–16 tapes per inch

Additional Materials

While the main body is woven PP, FIBCs may also incorporate:

• Polyethylene (PE) liners — for additional moisture or contamination protection
• Conductive threads — for Type C FIBCs to dissipate static electricity
• Aluminum liners — for barrier protection against oxygen and moisture
• Gusset panels — for improved stability and stackability

The choice of material and construction directly impacts the bag's performance, so selecting the right specifications is critical for your application.

Understanding Type C Conductive FIBCs

Type C FIBCs, also known as conductive FIBCs or groundable FIBCs, are specifically designed for the safe handling of flammable products in environments where static electricity poses a risk of ignition or explosion.

How Type C FIBCs Work

Type C bags are constructed from woven polypropylene fabric with interconnected conductive threads (typically made from stainless steel or carbon-infused yarn). These conductive threads form a Faraday cage around the bag's contents.

When properly grounded, any static charge generated during filling or discharging is safely directed to the ground, preventing the accumulation of electrostatic energy that could cause a spark.

Key Requirements

Critical: Type C FIBCs must be grounded during all filling and discharging operations. Failure to ground the bag can result in a dangerous static discharge.

• Grounding connection must be verified before each operation
• All conductive elements must be interconnected with a resistance of less than 10⁸ ohms
• Grounding clip must be attached to a verified earth ground point
• Personnel must also be properly grounded when handling Type C bags

Type C vs. Other FIBC Types

Type	Conductivity	Grounding Required	Use Case
Type A	None	No	Non-flammable products only
Type B	None (breakdown voltage < 4kV)	No	Dry, flammable powders (no flammable vapors)
Type C	Conductive threads	Yes — mandatory	Flammable products and atmospheres
Type D	Static dissipative fabric	No	Flammable products (no grounding needed)

Applications for Type C FIBCs

Type C FIBCs are used when handling:

• Flammable powders — fine chemicals, pharmaceuticals, food powders
• Products in flammable atmospheres — where solvent vapors or gases are present
• Combustible dust environments — grain handling, sugar processing, metal powders
• Hazardous chemicals — that generate static during transfer

Safety Protocols for Type C Use

1. Before filling — attach grounding clip and verify continuity with a resistance meter
2. During filling — ensure the grounding connection remains intact
3. During transport — grounding is not required once filling is complete
4. Before discharging — re-attach grounding clip and verify continuity
5. After use — inspect conductive threads for damage before reuse

Inspection and Maintenance

• Check resistance of conductive network before each use (must be below 10⁸ ohms)
• Inspect grounding tabs for corrosion or damage
• Replace bags with any broken or disconnected conductive threads
• Maintain records of resistance testing for compliance documentation

Type C FIBCs provide essential protection in hazardous environments, but their effectiveness depends entirely on proper grounding procedures. Always follow manufacturer guidelines and applicable safety standards.

Understanding FIBC Safety Factors

The safety factor (SF) of an FIBC is a critical design parameter that indicates how much stronger the bag is compared to its rated Safe Working Load (SWL). It provides a margin of safety to account for unexpected stresses during filling, handling, transport, and storage.

Common Safety Factor Ratings

Safety Factor	Type	Typical Use
5:1	Single-trip	Standard one-time use FIBCs
6:1	Multi-trip	Reusable FIBCs designed for multiple uses

What Do These Ratios Mean?

A 5:1 safety factor means that an FIBC rated for a 1,000 kg SWL must be able to withstand 5,000 kg of force before structural failure. Similarly, a 6:1 safety factor means the same bag must withstand 6,000 kg.

Why is the Safety Factor Important?

The safety factor accounts for real-world variables that can stress an FIBC beyond its normal operating conditions:

• Dynamic forces during lifting and transport
• Impact loads from accidental drops
• Stacking pressure in warehouse storage
• Environmental degradation from UV exposure or moisture
• Filling forces from product weight and impact during loading

Testing Requirements

FIBCs must undergo certification testing to verify their safety factor:

1. Top lift test — the bag is filled to 6x its SWL and lifted
2. Drop test — filled bags are dropped from 0.8 to 1.2 meters
3. Stacking test — filled bags are loaded with additional weight to simulate stacking
4. Tear propagation test — a small cut is made to verify it does not propagate under load

Choosing the Right Safety Factor

• Use 5:1 (single-trip) for one-time shipping applications
• Use 6:1 (multi-trip) when bags will be reused or subjected to demanding conditions
• Always follow industry-specific regulations and standards for your application

Understanding and selecting the appropriate safety factor is essential for safe and compliant bulk packaging operations.

Can FIBC Bags Be Reused?

The reusability of an FIBC depends on its type, safety factor rating, and condition after initial use. Understanding these factors is critical for maintaining safety and compliance.

Single-Trip vs. Multi-Trip FIBCs

Type	Safety Factor	Reuse Policy
Single-trip	5:1	Designed for one-time use only
Multi-trip	6:1	Designed and certified for multiple uses

When Can FIBCs Be Reused?

Multi-trip FIBCs with a 6:1 safety factor can be reused, but only under the following conditions:

1. Visual inspection — the bag must be thoroughly inspected for damage before each use
2. No visible defects — no cuts, tears, abrasion, or UV degradation
3. Loop integrity — all lifting loops must be intact and undamaged
4. Clean interior — the bag must be free of residual product and contamination
5. Label legibility — the SWL and safety factor labels must be readable

Inspection Checklist for Reuse

Before reusing any FIBC, perform these checks:

• Examine all seams for signs of separation or stress
• Check lifting loops for cuts, fraying, or elongation
• Inspect the body fabric for holes, tears, or thinning
• Verify the filling and discharge spouts are functional
• Ensure the liner (if present) is intact and properly positioned
• Confirm all labels and markings are legible

When to Retire an FIBC

Immediately retire a bag if you observe:

• Any cut or tear longer than 5 mm in the body fabric
• Damaged or distorted lifting loops
• Seam separation of any kind
• UV degradation (visible fading, brittleness, or flaking)
• Chemical contamination from previous contents
• Missing or illegible labels

Industry Best Practices

• Maintain a reuse log for each multi-trip FIBC
• Assign a maximum reuse count based on manufacturer recommendations
• Train personnel on proper inspection techniques
• Store used bags in a dry, shaded area to prevent UV degradation

Reusing FIBCs can reduce packaging costs, but safety must always come first. When in doubt, replace the bag.

FIBC Shipping Timeline

Understanding the full timeline from order placement to delivery is essential for planning your bulk packaging supply chain. The total lead time consists of production time plus shipping time.

Production Timeline

Phase	Duration	Details
Order confirmation	1–2 days	Specifications reviewed and confirmed
Raw material procurement	3–5 days	PP resin, additives, and accessories sourced
Manufacturing	7–14 days	Weaving, cutting, sewing, printing, QC
Quality inspection	1–2 days	Testing to verify SWL, safety factor, and appearance
Packing and loading	1–2 days	Baling, palletizing, container loading

Total production time: approximately 2–3 weeks

Shipping Options

Sea Freight (Standard)

• Transit time: 3–5 weeks depending on destination port
• Cost: Most economical option
• Minimum quantity: Full container load (FCL) recommended

Destination Region	Estimated Transit Time
Southeast Asia	7–14 days
Middle East	15–20 days
Europe	25–35 days
North America	20–30 days
South America	30–40 days
Africa	20–35 days

Air Freight (Express)

• Transit time: 3–7 days
• Cost: Significantly higher than sea freight
• Best for: Urgent orders, small trial quantities, sample shipments

Rail Freight (Selected Routes)

• Transit time: 15–20 days to Central Asia and Europe
• Cost: Between sea and air freight
• Availability: Limited to specific trade corridors

Factors That May Affect Timeline

• Custom specifications — non-standard sizes or features may require additional production time
• Peak season — demand surges can extend production and shipping timelines
• Customs clearance — import regulations vary by country and can add 3–7 days
• Weather and port congestion — may cause unexpected delays in sea freight

Tips for Timely Delivery

1. Place orders 4–6 weeks before your required delivery date
2. Consider maintaining a buffer stock for uninterrupted operations
3. Request production updates and shipping tracking from your supplier
4. Plan ahead for holiday periods that may affect production or shipping schedules

We work to provide accurate timelines and keep you informed throughout the production and delivery process.

Minimum Order Quantity (MOQ)

We strive to balance cost-effective manufacturing with flexibility for our customers. Our minimum order quantities are structured to accommodate both large-scale operations and new customers evaluating our products.

Standard MOQ

Order Type	Minimum Quantity	Details
Standard FIBCs	500 bags	Stock specifications, white unprinted bags
Custom FIBCs	500 bags	Custom size, printing, coating, or features
Trial orders	100–200 bags	Available for new customers
Sample bags	1–10 bags	For testing and evaluation (cost of samples applies)

Trial Orders for New Customers

We understand that choosing the right FIBC supplier requires verification. For new customers, we offer:

• Reduced MOQ of 100–200 bags for initial trial orders
• Free sample bags (1–3 pieces) for physical testing — shipping costs apply
• Technical consultation to ensure the bag specification matches your needs

Factors That Affect MOQ

The minimum order quantity may vary based on:

1. Customization level — highly specialized bags may require a higher MOQ to justify production setup
2. Raw material availability — uncommon fabric weights or colors may affect minimums
3. Printing complexity — multi-color printing on all panels may require a higher MOQ
4. Certification requirements — UN-certified bags may have specific batch minimums

Bulk Order Pricing

Larger orders benefit from economies of scale:

Quantity	Typical Discount
500–2,000 bags	Standard pricing
2,001–5,000 bags	3–5% discount
5,001–10,000 bags	5–8% discount
10,000+ bags	Custom pricing — contact for quote

Ordering Process

1. Specify requirements — size, SWL, safety factor, coating, filling/discharge, printing
2. Receive quotation — detailed pricing including production and shipping costs
3. Confirm order — review and approve specifications before production begins
4. Production — manufacturing begins after order confirmation and deposit
5. Quality inspection — finished bags are tested before shipment
6. Delivery — packed and shipped according to your preferred method

Container Loading Reference

For planning purposes, a standard 20-foot container holds approximately 3,000–5,000 FIBCs (depending on bag size and baling method), and a 40-foot container holds approximately 6,000–10,000 bags.

We are committed to working with you to find the right order quantity that meets your operational needs and budget requirements.

Custom FIBC Solutions

We offer comprehensive customization options to ensure your FIBC bags meet the exact requirements of your product, handling equipment, storage conditions, and regulatory environment.

Available Customization Options

Dimensions and Capacity

• Width and length: 60 cm to 130 cm
• Height: 80 cm to 200 cm
• Custom shapes: U-panel, circular, or 4-panel construction
• SWL: 500 kg to 2,000 kg

Fabric Specifications

Option	Available Choices
Fabric weight	100–250 g/m²
Coating	Uncoated, inner lamination, outer lamination
Color	White (standard), black, yellow, blue, green, custom
UV treatment	Standard (200 hrs) or extended (1,600 hrs)
Conductive	Type A, B, C, or D

Filling Options

• Top filling spout — standard or oversized diameter
• Duffle top — full-width opening for easy filling
• Flap top — partially covered opening
• Open top — no closure, full access
• Conical top — tapered for specific filling equipment

Discharge Options

• Bottom spout — standard or oversized diameter
• Petal bottom — multiple closure points
• Plain bottom — no discharge opening
• Conical bottom — tapered for controlled discharge

Liner Types

• PE tubular liner — basic moisture protection
• PE form-fitted liner — conforms to bag shape
• Aluminum foil liner — oxygen and moisture barrier
• Conductive liner — static dissipation for hazardous materials
• Gusseted liner — improved fit for square bags

Printing and Branding

• Up to 4-color printing on up to 4 panels
• Custom logos and branding
• Handling instructions and safety warnings
• Barcode and QR code printing
• Document pouch attachment

Customization Process

1. Consultation — share your requirements, product details, and handling conditions
2. Design proposal — we provide specifications and drawings for your review
3. Sample production — a prototype bag is manufactured for testing
4. Testing and approval — you test the sample with your product and equipment
5. Production — full manufacturing run after your final approval
6. Quality control — each batch is tested to ensure consistent quality

Minimum Order for Custom Bags

Custom FIBCs typically require a minimum order of 500 bags per specification. We can discuss smaller trial runs for new customers who need to validate a custom design before committing to a full order.

Contact our team to discuss your specific requirements and receive a detailed customization proposal.