PP Flat Yarn Extrusion
Virgin polypropylene polymer is blended with UV masterbatch and melted through high-precision T-dies to form tensile tapes with controlled elongation.
IN-HOUSE MANUFACTURING FACILITY SINCE 2001
Full-Process FIBC Production & Engineering Control
From high-tensile PP flat yarn extrusion and heavy circular weaving to cleanroom lockstitch sewing and multi-point proof testing. Every stage is controlled in Yantai, Shandong to prevent specification drift.
100% Virgin PP Polymer Only
Full Batch Traceability from Resin to Bale
In-House 15,000 kg Cyclic Rig Testing
PLANT OVERVIEW
Yantai Manufacturing Plant
Yantai Qinfeng Plastic Co., Ltd. · Shandong, China
2001
Year Established
1.2M+
Bags / Year Capacity
100%
Virgin Resin Trace
CNTAO
Qingdao Port Base
FACILITY TOUR
Inside Our Yantai Production Facility
Explore our modern workshops equipped with high-speed extrusion lines, heavy circular looms, automated cutting tables, clean sewing lines, and specialized testing equipment.
Circular & Flat Weaving
Heavy circular looms produce seamless tubular fabrics (120 to 240+ GSM), eliminating vertical side seams for higher burst strength and stability.
Lamination & Moisture Barrier
Internal or external PE/PP coating application provides moisture resistance, sift-proofing, and clean surface protection for hygroscopic cargo.
Precision Cutting & Flexo Print
Ultrasonic and hot-wire cutting prevent fraying. Up to 4-color flexographic printing applies custom logos, UN codes, handling graphics, and warning icons.
Clean Sewing & Loop Assembly
Skilled technicians using heavy-duty double-thread chainstitch machines install cross-corner loops, baffles, spouts, and sift-proof filler cords.
Rig Testing & Baling Packaging
In-house hydraulic cyclic top-lift test rig validates 5:1 and 6:1 safety factors. Finished bags undergo air-cleaning before hydraulic baling on pallets.
PROCESS DISCIPLINE
The 8-Stage Manufacturing Lifecycle
Every order follows a strict milestone checklist. Work instruction cards travel with each batch to ensure complete consistency from extrusion to container dispatch.
01
Polymer Batch Ingestion
100% prime virgin PP polymer received with manufacturer COA and lot numbers recorded for full traceability.
02
Yarn Drawing & UV
High-tenacity tape extrusion with precise denier calibration and certified UV light stabilizer compounding.
03
Fabric & Belt Weaving
Circular tubular and flat weaving. Heavy-duty lifting loops woven to specified tensile break ratings (up to 30 kN).
04
Coating & Lamination
Even extrusion coating to seal fabric pores, preventing fine powder sift and environmental humidity ingress.
05
Cutting & Printing
Hot knife cutting eliminates loose frayed threads. Multi-color high-opacity flexo printing applied per client artwork.
06
Cleanroom Sewing
Heavy lockstitch assembly with needle thread lubrication, double chain stitches, and anti-dust felt filler cords.
07
Inspection & Load Test
Dimension check, seam integrity audit, light-table foreign matter screening, and top-lift cyclic testing.
08
Baling & Palletization
Hydraulic baling into weather-resistant poly wraps, strapped onto solid fumigated wooden pallets for ocean freight.
CAPABILITY MATRIX
In-House vs. External Production Scope
Clear, honest boundaries build reliable supply chains. Here is how our manufacturing capabilities, quality controls, and partner collaborations are structured.
| Process | Facility Ownership | Control Method | Available Evidence | Capability Boundary / Limitation |
|---|---|---|---|---|
| PP Tape Extrusion | In-House | Real-time denier gauge & tensile break elongation test | Tape tensile test log, Resin COA archive | 100% virgin PP only; zero recycled post-consumer regrind handled |
| Circular & Flat Weaving | In-House | Automatic warp/weft break detectors & GSM scale audit | Fabric GSM audit records, batch roll identification | Tubular widths from 70 cm to 110 cm; flat fabric up to 4.2 m wide |
| Fabric Lamination | In-House | Extruder temperature profiling & coating thickness gauge | Peel strength inspection sheet, lamination log | 15 to 35 GSM PP/PE coating; specialized EVOH barrier requires co-ex liner |
| Lifting Webbing Weaving | In-House | Heavy shuttleless looms; tensile pull to break testing | Webbing break strength certificate (15kN–30kN) | Standard widths 50 mm, 70 mm, 100 mm; color identification stripes |
| Precision Cutting & Print | In-House | Hot-wire / ultrasonic edge seal; artwork color check | Cutting size tolerance card (±15mm), printed sample proof | Up to 4-color flexographic printing; gravure photorealistic outsourced |
| Sewing & Bag Assembly | In-House | Double-needle chainstitch, needle tracking, sift cord check | Operator ID stamps, daily first-piece approval sheet | Manual precision sewing requires approved sample golden master |
| PE / Foil Liners | Qualified Partner | Supplier audit, thickness gauge, incoming sealed inspection | Partner ISO/BRC certification, material migration test | Subject to partner minimum batch runs (MOQ applies on custom liners) |
| Top-Lift Load Testing | In-House Test Rig | Hydraulic cyclic & proof pull up to 15,000 kg (ISO 21898) | In-house load certificate with load/elongation graph | Official UN Dangerous Goods or third-party cert via SGS/Labpartner |
MANUFACTURING PRINCIPLES
What We Guarantee in Every Order
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100% Virgin PP Polymer GuaranteeWe strictly forbid the introduction of regrind or degraded post-consumer scrap resin to ensure full tensile integrity and UV life.
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No Specification Drift Between Sample & BulkBulk production must strictly match the signed Golden Sample in fabric GSM, strap denier, stitch density, and bag dimensions.
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Complete Batch Traceability Back to Raw ResinEvery production lot is linked to resin lot number, extrusion date, sewing team, and load test logs for instant investigation.
OPERATIONAL BOUNDARIES
Our Transparent Operating Boundaries
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Third-Party Official CertificationsIn-house load testing validates bag performance, but mandatory UN Dangerous Goods certs or food contact migration must be booked with third-party labs.
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Commodity Retail Small SacksWe specialize exclusively in heavy-duty FIBC bulk bags (500kg–2000kg). We do not produce 25kg commodity PP woven shopping or grocery bags.
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Custom PE / EVOH Liner MOQsSpecialized shaped bottle liners or EVOH barrier films are sourced from certified film extrusion partners and may involve specific MOQ thresholds.
COLLABORATE WITH A DIRECT MANUFACTURER
Need Engineered FIBC Solutions Direct from the Factory Floor?
Speak directly with our packaging engineers. We review your material handling parameters, provide 2D CAD drawings, calculate volume pricing, and manufacture prototypes in 7–10 days.