Needle detection requirements for exported apparel usually come from customer technical agreements, importing-country product safety regulations and brand factory audit rules rather than a single mandatory standard. Buyers and QC staff should confirm detection sensitivity (such as the detectable diameter of ferrous fragments), tunnel height, conveyor speed and alarm method at the order stage, and define the inspection points for finished goods, semi-finished pieces and packaging accessories. For childrenswear, underwear and other higher-risk categories, customers often require piece-by-piece inspection with records kept, and such clauses are best written into the order technical annex.
Equipment selection should match product form and capacity. Flatbed needle detectors suit single-piece passage of garments and knitwear; conveyor-belt models integrate with production lines for continuous batch inspection. For garments with metal zippers, buttons or similar trims, consider segmented inspection or X-ray inspection equipment to reduce false rejects. When purchasing, pay attention to sensitivity stability, interference resistance and tunnel dimensions, and ask the supplier for calibration and operator training rather than deciding on price alone.
In daily use, verify detection capability each shift with standard test pieces (Fe, non-ferrous, SUS, etc.), record the results and maintain the conveyor and probe regularly. When an alarm occurs, isolate and re-inspect the item according to procedure, confirm the location of the foreign object and trace it back to the process. Inspection records, calibration records and exception-handling records should be kept complete for customer audits or third-party reviews. Moving detection requirements earlier to cutting and sewing stages, together with a routine check system, helps reduce needle risk and stabilize shipment quality.