Zipper Inspection and Export Documentation: Setting AQL, Needle Detection, and Packing

In zipper inspection, the most common problems are not in the product itself but in the sampling plan, needle-detection records, and documentation wording. This article sets out practices that can be written directly into a contract.

2024-06-06 ·Topics ·0 views

Most disputes on export orders are not about "we cannot make it" but about "the acceptance criteria were never written clearly". The following sections outline the key points of the inspection process.

1. Sampling plan

Common AQL sampling: critical defects (safety hazards) at 0, major defects (functional failure, obvious color difference) commonly AQL 1.0–2.5, minor defects (slight appearance issues) 2.5–4.0. The contract must state the inspection level (general level II) and the acceptance numbers; "per AQL" alone is not enough.

2. Functional inspection items

Smooth operation: no jamming throughout, three full cycles
Self-opening test: after closing, pull gently on both sides; must not separate
Top and bottom stops: the slider must not come off
Pull tab: must not detach or deform
Color difference: compared with the sealed sample, ΔE usually controlled within 1.0

3. Needle detection and metal contamination

Textiles exported to Japan, Europe, and the United States generally require 100% or sampled needle detection, with sensitivity recorded (for example Fe 1.2 mm / Non-Fe 1.5 mm). Needle detection records must accompany the goods and correspond to the batch number; otherwise they cannot be traced during a customer audit.

4. Documentation scope

Common documents include the commercial invoice, packing list, certificate of origin (CO or FORM E, etc.), test reports (CPSIA/REACH/OEKO-TEX), and the GRS transaction certificate (TC, if recycled content is claimed). Note that a TC must correspond to the order quantity and product and cannot be reused across shipments.

5. Packaging and marking

Inner packing quantity, label content, and shipping marks must be checked item by item against customer requirements. Much rework is caused by misprinted shipping marks or incorrect quantity per carton, unrelated to product quality.

YCC Donglong can provide needle detection records and test reports with the goods and supports acceptance according to the customer's AQL plan; it is recommended to write the acceptance criteria into the confirmation sheet at the sampling stage.