Delamination and Tunneling Defect Log

This template is for laminated roll defects such as delamination, tunneling, bubbles or blisters, and related web issues like wrinkles, waviness, or telescoping. It also captures the suspected cause, containment decision, and evidence needed to support a quality disposition. Use it when the defect is visible on a roll or during in-process inspection and you need traceable documentation for the lot or work order.

Use it as soon as a defect is observed during setup, in-process checks, rewind, or final roll inspection. It is especially useful when the issue may affect downstream converting, slitting, printing, or customer use. If the defect is intermittent, record the first observed location and the extent so the team can determine whether the problem is localized or systemic.

A line operator, quality inspector, shift lead, or process technician can complete it, depending on your site’s escalation rules. The key is that the person entering the record can identify the product, inspect the defect, and document the immediate action taken. If your site uses a quality hold process, the final disposition should be confirmed by the authorized reviewer.

Check at startup, after changeovers, after adhesive or tension adjustments, and at any point a visual defect appears. For high-risk products, add periodic checks during the run and at rewind or pack-out. The cadence should match your control plan and the sensitivity of the laminate structure, especially when moisture, cure time, or tension drift can change defect behavior.

This is primarily a quality record, so it aligns with ISO 9001-style non-conformance control, traceability, and corrective action practices. In regulated manufacturing, it can also support internal control plans, customer quality requirements, and documented disposition workflows. If the laminate is used in food, medical, or safety-related applications, your site may also need to align the record with applicable industry-specific validation and release procedures.

The biggest mistake is writing a vague note like "bad laminate" without identifying the defect type, location, and affected length. Another common issue is guessing a root cause without recording the process values that support it, such as tension, coat weight, or temperature. Teams also forget to document whether the roll was held, reworked, scrapped, or released after verification.

Yes. You can add fields for adhesive type, substrate pairings, coat weight targets, cure time, or specific machine zones if those factors matter to your process. Many teams also add defect severity definitions, customer-specific acceptance criteria, or links to the control plan so inspectors can make consistent decisions across product families.

An ad hoc note usually captures only the symptom, while this template captures the defect, the suspected cause, the containment action, and the evidence in one place. That makes it easier to trend recurring issues, support corrective action, and prove that affected material was controlled. It also reduces the chance that a roll is released without a documented review.

Attach clear photos of the defect area, the full roll context if helpful, and any relevant gauge or measurement readings. If your process uses inspection tools such as tension readings, thickness checks, or surface condition measurements, include those values with the record. Good evidence makes it easier to compare similar defects across shifts and machines.