Bulk Packaging, Simplified.
Engineered Around Your Real Process.
Direct factory manufacturing in Yantai since 2001. Eliminate fabric tearing, powder leakage, and high-speed filling line downtime with 100% virgin PP custom jumbo bags.
Why Choose QINFENG?
Modern manufacturing. Verified fabric density. Hassle-free export delivery. Partner with a direct Yantai manufacturer dedicated to zero packaging failure.
Guaranteed Grammage (GSM)
Strictly verified 140g to 220g fabric weight. Zero artificial weight reduction from initial sample to 50,000-unit repeat production.
100% In-House Production
Circular weaving, polymer extrusion coating, precision cutting, and master stitching fully managed under our own Yantai roof.
7–10 Day Rapid Sampling
Receive 1–2 customized test bags delivered by air express to benchmark drop resistance, filling speed, and forklift handling on your line.
ISO, UN & SGS Certified
Full UN Dangerous Goods testing reports, ISO 9001 quality management, food-grade compliance, and verified Wechest third-party audits.
Transparent PP Resin Index
Polypropylene accounts for ~60% of manufacturing cost. We provide transparent raw-material cost locking with zero unannounced hikes.
FOB, CIF & Full DDP Delivery
Direct port departures from Qingdao/Yantai. We handle freight, customs clearance, and inland trucking to USA, Canada, Australia, and Europe.
Explore Our FIBC Bulk Bag Range
All bag models are engineered around your bulk density, discharge machinery, and container logistics. Built to order with fast turnaround.
Standard Industrial FIBC
High-tensile tubular or U-panel construction for salt, mineral ores, chemical powders, grains, and construction aggregates.
- Capacity: 500 kg – 2,000 kg
- Safety Factor: 5:1 (Single Trip) / 6:1
- Fabric: 140g – 220g Virgin Polypropylene
Cross-Corner Lifting Bags
Heavy-duty standing lifting loops remain permanently upright, allowing automatic forklift tine entry without manual hook placement.
- Capacity: 1,000 kg – 2,500 kg
- Feature: Rigid standing polyester/PP loops
- Application: High-throughput automated filling
Food & Pharmaceutical FIBC
Manufactured in dedicated clean rooms with ultrasonic cutting, thread vacuuming, and co-extruded food-contact barrier liners.
- Compliance: ISO 22000 / HACCP / SGS Tested
- Protection: Form-fit hermetic EVOH/PE liners
- Application: Sugar, cocoa, milk powder, starch
Ventilated Air-Flow Bags
Engineered with woven breathable stripes and heavy-duty airflow mesh to prevent moisture rot and mold in firewood and produce.
- Ventilation: 26–32 breathable air stripes
- Ideal For: Potatoes, onions, logs, curing crops
- Colors: Natural White, Olive Green, Black
UN Hazardous Materials Bags
Certified for Class II and Class III dangerous chemicals. Fully compliant with drop, tear, topple, and stacking load test standards.
- Testing: Certified UN drop & righting tests
- Lining: Sift-proof felt cords & conductive tabs
- Classification: 13H1, 13H2, 13H3, 13H4 ratings
Dumpster & Waste Skip Bags
Low-profile wide-opening containers for demolition rubble, construction debris, metal recycling, and municipal garden clearance.
- Dimensions: 1–3 Cubic Yard standard formats
- Straps: Continuous perimeter lifting webbing
- Retail: Custom supermarket barcode labeling
How Ordering From Our Factory Works
From application analysis to containerized dock delivery, our process is designed for zero confusion and rapid deployment.
Application Review
Tell us what bulk material you pack, your bulk density, filling method, and destination. We calculate the exact bag dimension and GSM.
Transparent Quotation
We provide a real-time, polypropylene resin-indexed quotation locked for 3 to 15 days, complete with freight estimates to your destination port.
7–10 Day Line Sample
We produce 1–2 test bags to your exact specifications and dispatch via air courier so your engineering team can perform real trial drop tests.
Bulk Production & DDP
Production completed in 30–45 days. We handle sea freight departures from Qingdao/Yantai and door-to-door delivery with customs cleared.
Trusted by Industrial Packaging Leaders Worldwide
See why manufacturing plants, bulk distributors, and commodity exporters partner with QINFENG year after year.
"Before switching to QINFENG, we suffered constant loop breakage during high-speed forklift handling in our mineral ore packaging line. QINFENG upgraded our fabric to verified 200g with double cross-corner stitching. Zero failures in over 40,000 bags shipped."
"Their 7–10 day custom sampling allowed us to test two different spout configurations directly on our automated filling equipment before committing to a 40ft container order. Transparent pricing and always on schedule."
"We required Wechest third-party factory inspection before signing a long-term supply agreement. QINFENG opened their Yantai plant doors without hesitation and passed with flying colors. Top-tier factory transparency."
Ready to Eliminate Bulk Packaging Failures?
Get in touch with our Yantai technical engineering team today. We will calculate the optimal bag construction for your product and send 1–2 test samples within 7–10 business days.