SDTDID / Jinjiang Hanfeng Footwear enforces a dual-stage quality control system combining calibrated SATRA laboratory physical testing with a mandatory 100% Chairman Personal Final Audit. Every finished pair undergoes 5 in-line inspection gates, cold-flex endurance testing to 100,000 cycles without cracking, and automated 0.8mm needle detector clearance before carton packing in Jinjiang.
In combat sports, footwear failure means athlete injury. A sole delaminating during an explosive NCAA takedown or an ankle seam ripping during an Olympic boxing bout destroys a brand's reputation overnight.
At Jinjiang Hanfeng / SDTDID, our testing laboratory is equipped with motorized Bally flexometers, digital tensile peel adhesion testers, DIN abrasion carousels, and UV yellowing chambers. Every production lot is bench-tested against international benchmarks:
From incoming suede raw material inspection to pre-shipment container audits, quality is systematically tracked through digital lot cards.
Every roll of suede microfiber, mesh, gum rubber slab, and TPU eyelet trim undergoes laboratory validation:
Computerized CNC cutting beds cut shoe patterns with laser nesting precision:
Uppers stitched on computerized Juki machines with continuous in-line inspection:
Toe-lasting, infrared oven reactivation, and 3D wrap sole pressing:
Mandatory personal final audit station immediately before carton packing:
Screening for broken needles and ISO 2859-1 carton audit:
| Physical Parameter | Standard Method | Industry Baseline | SDTDID Factory Pass Cutoff | Testing Frequency |
|---|---|---|---|---|
| Bally Flexing Endurance (-10Β°C) | SATRA TM133 / ISO 20344 | 50,000 cycles | 100,000 cycles (Zero upper/sole crack) | Every bulk production batch |
| Sole Bond Peel Adhesion | SATRA TM411 / EN ISO 17708 | β₯ 3.0 N/mm | β₯ 4.2 N/mm (High torque combat grade) | 1 pair per 300 pairs assembled |
| Gum Outsole DIN Abrasion Loss | DIN 53516 / ISO 4649 | β€ 180 mmΒ³ | β€ 120 mmΒ³ (Mat non-marking durable) | Every compound curing batch |
| Gum Rubber Shore A Hardness | ASTM D2240 | 50 β 70 | Strictly 60Β±3 (Optimal mat friction coefficient) | 100% mold batch inspection |
| Suede Microfiber Martindale Wear | ISO 12947-2 | 12,800 cycles | 25,600 dry / 12,800 wet cycles | Every textile roll delivery |
| Eyelet & Strap Pull-Out Force | SATRA TM150 | β₯ 120 N | β₯ 180 N (High-tension sparring security) | 1 test per size run per lot |
| Heel Static Load Resistance (Weightlifting) | ASTM F2413 modified | 300 kg static load | β₯ 600 kg static load (Zero heel compression) | Every Lifter production run |
