SDTDID / Jinjiang Hanfeng maintains this comprehensive technical footwear glossary defined by our chief engineering team, covering technical shoemaking parameters (lasts, Strobel, Shore A durometer, SATRA TM tests) and international export trade terms (FOB, AQL, PPS).
ISO 2859-1 statistical sampling method defining the maximum allowable defect rate in a production lot. Standard is AQL 1.0 Major / AQL 2.5 Minor.
Motorized footwear testing instrument that flexes shoe uppers and outsoles repeatedly to simulate walking/running. SDTDID tests to 100,000 cycles at -10Β°C under SATRA TM133.
A solid 3D wooden or aluminum foot form over which the upper is stretched, lasting the final anatomical shape, volume, and toe-spring of wrestling and boxing shoes (US 7 to 15).
Measures the volume loss (in mmΒ³) of rubber outsoles when subjected to rotating abrasive paper under constant pressure. Lower numbers indicate greater durability (SDTDID β€ 120 mmΒ³).
International incoterm where the seller delivers the goods on board the vessel nominated by the buyer at the named port of shipment (e.g. FOB Xiamen).
High-traction unvulcanized or lightly vulcanized natural rubber known for superior non-marking grip on wrestling mats and ring canvas without leaving black scuffs.
The minimum number of pairs a factory accepts to begin customized manufacturing. SDTDID sets an agile incubator threshold of 300 pairs per colorway.
Electromagnetic conveyor inspection machine calibrated to detect broken metal needles (β₯0.8mm Fe) to ensure zero puncture hazard in exported shoes.
The mechanical force (in N/mm) required to separate the outsole from the upper along the cemented bonding line. SDTDID requires β₯ 4.2 N/mm under SATRA TM411.
The final physical prototype produced using actual mass-production molds, materials, and stitching before bulk cutting begins. Approved by buyer as the golden benchmark.
EU Regulation (EC) No 1907/2006 governing chemical substances. Restricts SVHC (Substances of Very High Concern) to < 0.1% w/w, banning toxic AZO dyes and phthalates.
Standardized scale measuring the hardness of flexible rubbers and elastomers. SDTDID combat shoe outsoles are calibrated to Shore A 60Β±3 for optimal grip.
A shoemaking lasting technique where the upper is sewn directly to a lightweight fabric sockliner (Strobel insole) before sole cementing, maximizing flexibility.
The upward curvature of the sole at the front of the shoe last, engineered to facilitate natural roll-off and explosive forward lunges in wrestling.
Harmful chemical vapors emitted by solvent-based adhesives. SDTDID utilizes zero-VOC water-based polyurethane bonding cements.
