Full-Process In-House Control
Drawing, weaving, lamination, cutting, printing, cleanroom sewing and packaging are monitored under unified ISO standards.
Custom FIBC Manufacturer Since 2001
Custom bulk bags, built around your process.
Tell us what you are packing, how it is filled, lifted, stored and discharged. QINFENG turns your application into an engineered, production-ready FIBC specification.
2001
Factory Founded
500 pcs
Standard MOQ
30–45 d
Export Lead Time
QINFENG
More than a bag specification
A manufacturing partner focused on safe material handling, zero contamination, and repeatable bulk production.
01
Application Review
Bulk density, filling temperatures, static risks, crane lifting and discharge methods analysed first.
02
Custom Construction
Virgin PP fabric GSM, loop reinforcement, coating, PE/foil liners, dustproof seams and high-definition print.
03
Sample Before Bulk
Physical sample proofing and strict top-lift testing ensure no specification drift before mass orders run.
A Real Manufacturing Partner
FIBC manufacturing should be visible and verifiable.
From PP polymer extrusion and precision circular weaving to dust-free cleanroom fabrication and load testing, every process is controlled in Yantai, Shandong.
Yantai, Shandong, China
↗
In-house manufacturing facility with 20+ years of worldwide export experience.
Experienced Workmanship
Senior sewing specialists and multi-point QC ensure consistent double-chain lockstitches and sift-proof seams.
Export-Ready Documentation
Batch certificates, food contact declarations, top-lift test reports, and pallet packing slips supplied with each shipment.
Strict Repeat-Order Control
Signed golden samples and master recipe cards guarantee consistent fabric GSM, loop tensile strength and dimensions year over year.
OUR PRODUCTS
FIBC Solutions for Every Need
From standard designs to fully customized solutions, we manufacture high-quality FIBC bulk bags for a wide range of industries. Different materials, structures and features — all made to match your application.
View All Products →
Our Commitment
Packaging for a Cleaner, Healthier Tomorrow
We believe bulk packaging can do more — protect your products, your people and your planet.
→ Our Sustainability JourneyKEY FIGURES
A Trusted Partner
in Bulk Packaging
20+
20+
Years of Experience
F
Full
Process Manufacturing
G
Global
Customers
L
Long-term
Partnerships
CERTIFICATIONS
ISO
SGS
UN
REACH
APPLICATIONS
Used in
Industries
Around the
World
Our FIBC bags help businesses across diverse industries move and store materials safely and efficiently.
Explore All Applications →Risk Mitigation
A low bag price cannot offset a catastrophic spill.
Professional industrial buyers protect materials, warehouse safety and brand trust. Here are the 6 critical failure points QINFENG prevents.
01
Mass Production Spec Drift
Vendors send pristine samples, then cut fabric GSM, loop denier, or UV stabilizers on bulk runs. QINFENG binds specs to verifiable test receipts.
02
Loop Failure Under Hoisting
Unreinforced corner stitches can rip under dynamic crane acceleration. We build full-length cross-corner and stevedore loops certified to 5:1 or 6:1 SF.
03
Incomplete Engineering
Purchasing solely on bag dimensions without considering aeration density, discharge iris tension or headspace causes bulging, tipping and transit loss.
04
Misleading Price Comparison
A $0.30 cheaper bag often omits sift-proof felt cords or uses recycled regrind resin that degrades under sunlight. We provide full breakdown transparency.
05
Packaging Stockouts
Delayed bulk bags halt entire chemical packaging lines. QINFENG maintains raw resin buffers and adheres to committed 30–45 day export schedules.
06
Damaged Pallets & Contamination
Poor palletizing or unbanded bales crush lower tiers and cause moisture ingress. We use heavy stretch wrapping, edge guards and fumigated wooden pallets.
Technical Application Breakdown
Start with what you are packing.
Material properties and handling machinery determine the bag construction far more reliably than picking a generic SKU from a catalog.
Minerals, Cement & Aggregates
Engineered for quartz sand, cement clinker, graphite, ores and calcium carbonate. Features heavy fabric (160–240 GSM) and anti-abrasion bases.
Find the right construction →Food Ingredients, Sugar & Feed
100% virgin resin, ultrasonic thread cutters and form-fit barrier liners for flour, starch, milk powders, cocoa and animal feed.
Find the right construction →Chemicals, Resins & Special Waste
Formulated for plastic masterbatch, pigment powders, fertilizers and environmental recycling. Static protection and multi-layer aluminum liners available.
Find the right construction →Custom Manufacturing Mosaic
One FIBC. Key decisions that determine success.
Every component interfaces with filling lines, automated bag hangers, forklifts, shipping containers and discharge hoppers.
Fabric & Architecture
Tubular, U-Panel, 4-Panel & Conical Bases
From 120 GSM lightweight to 240+ GSM heavy-duty coated fabrics with certified UV resistance.
Lifting & Filling
Cross-Corner, Stevedore Loops & Spouts
Configured for crane hooks, automated spreader bars and dust-free filling necks.
Protection & Identity
Barrier Liners, Sift-Proof Cords & Printing
Form-fit LDPE / EVOH / conductive liners and multi-color company branding.
Specification Review
We quote the bag you actually need — not only a nominal size.
A thorough technical specification guarantees apples-to-apples quotation transparency and eliminates avoidable quality disputes before cutting begins.
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Material bulk density & flow characteristics
Ensures correct internal bag volume, headspace and breathing permeability.
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Crane hoisting & automated loop interface
Loop length, tensile load, wear pads and reinforcement patches matched to riggers.
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Moisture barrier & cleanroom packaging
Lamination thickness, nitrogen-purged PE liners, and food-grade batch records.
Customization Parameter Matrix
Every parameter is engineered to application demands.
| Safe Working Load (SWL) | 500 kg – 3,000 kg project range |
|---|---|
| Safety Factor (SF) | 5:1 (Single trip) / 6:1 (Multi-trip reusable) / UN Certified |
| Body Construction | Circular Tubular / U-Panel / 4-Panel / Conical / Q-Baffle |
| Fabric Weight (GSM) | 120 – 240+ GSM (Uncoated or Laminated with UV stabilizer) |
| Top Options | Open Top / Filling Spout / Duffle Skirt / Conical Inflow |
| Discharge Options | Flat Solid Bottom / Discharge Spout with Iris Closure / Full Drop |
| Loop Styles | Cross-Corner / 4-Corner Stevedore / Single / Double Point Webbing |
| Liners & Seams | Form-Fit LDPE, Foil, Baffle Liners / Single, Double Sift-Proof Cords |
| Custom Identity | Up to 4-color flexo printing, barcode labels, doc pockets |
Cooperation Process
From your material to repeat export production.
We align technical requirements early so procurement, QA engineers, factory staff and end-users share zero ambiguity.
01
Application Review
Bulk density, filling spout diameter, discharge mechanics, transport distance and storage conditions verified.
02
CAD Drawing & Quotation
Detailed technical drawing with full BOM, fabric GSM, loop specs, container pallet layout and FOB/CIF pricing.
03
Prototype & Testing
Custom physical samples fabricated in 7–10 days; top-lift load testing conducted to confirm safety factor before mass run.
04
Bulk Run & Global Shipping
Cleanroom manufacturing, in-line QA check, moisture-sealed palletization, customs clearance and repeat order archiving.
Start Your FIBC Project
Not sure about the exact bag engineering?
You don't need a finished CAD drawing. Tell us what you are loading, your target payload and port of arrival. Our engineering team will supply the technical recommendation.
Have an existing bag or drawing?
You can also send your current spec sheet, artwork, or photos directly to our engineering desk for price and capacity matching.
Contact sales team directly →Step 1 of 1
Project Requirement Inquiry
Buyer Questions
What overseas procurement teams ask first.
Key facts to clarify before starting a custom bulk bag project. Detailed technical tests and certificates are provided alongside every quote.
Yes. You can provide an existing engineering drawing, physical bag sample, or photos of your current packaging. Our laboratory will measure fabric GSM, tensile strength, loop denier, and lamination thickness to reproduce or optimize the exact construction.
Absolutely. That is our core expertise. Provide us with your product bulk density (e.g. 0.85 kg/L), target weight (e.g. 1,000 kg), filling equipment diameter, and shipping method (pallets vs container floor loading). We calculate exact internal volume and appropriate safety factor.
Yes. We strongly encourage pre-production sample confirmation. In-stock reference samples can be dispatched via DHL/FedEx immediately. Custom tailored samples according to your agreed CAD drawings take roughly 7–10 days.
Our standard production MOQ is 500 pieces per size for custom FIBCs. For ventilated bags or dumpster skip bags, trial runs of 200–300 pieces may be supported depending on fabric inventory. Full 20GP or 40HQ container orders receive maximum freight and unit economics.
Our primary export seaport is Qingdao Port (approx. 3 hours from our Yantai factory). We regularly supply on FOB Qingdao, CIF/CFR worldwide destinations, as well as DDP (Delivered Duty Paid) door-to-door delivery for North America, Europe, Southeast Asia, and Australia.