What are the most common spunbond quality claims, and how do you prevent them?

Six claims account for most disputes, and all six are preventable at the specification stage: GSM drift between batches — contract a tolerance and require per-roll records; uneven web with thin streaks or thick lanes — inspect a 1 m section on a light box before the run is released; colour variation between batches — seal a reference sample and approve each batch against it; roll geometry and winding faults that disrupt line feeding — specify diameter, core and tension, and seal a reference roll; moisture damage in transit — require moisture barrier packing and container desiccant; and lamination failure — run a bonding trial at production temperature and check for strike-through, bubbles and delamination before releasing the balance of the order.