Adhesive Coat Weight Verification Sheet

It covers the full verification trail for a coating or laminating run: line and job identification, adhesive lot, target coat weight, measurement equipment status, sample results, process settings, and final sign-off. The sheet is designed to show whether the measured coat weight stayed within the approved tolerance and whether any non-conformance was contained. It is useful when bond performance depends on a controlled adhesive laydown, not just a visual check.

Use it at startup, after changeovers, after adhesive or substrate lot changes, after maintenance on the coating system, and whenever a process drift is suspected. It is also useful for first-article verification before releasing a new job or restarting a paused run. If the line is already in a stable, validated state and no measurement is required by your quality plan, a lighter check may be enough.

A trained operator, line lead, or quality inspector can complete the sheet, but the person signing release should be authorized to accept the run. If the result is out of tolerance, the issue should be reviewed by quality, production, or engineering depending on your escalation rules. The key is that the person recording the result understands the measurement method and the acceptance criteria.

The cadence should follow your control plan, product risk, and line stability. Many teams verify at startup, at defined intervals during the run, and after any adjustment to pump pressure, die gap, applicator setting, or web speed. High-risk products or critical bond applications usually need tighter sampling than low-risk, non-critical jobs.

Common mistakes include using an uncalibrated balance, recording only one sample point, accepting a result without checking variation across the web, and failing to quarantine affected material after an out-of-spec reading. Another frequent issue is documenting the average while ignoring a drifting trend that points to a process problem. This template forces the team to capture both the measurement and the process conditions behind it.

Yes. It supports quality records expected under ISO 9001-style process control and can be adapted to internal validation or customer-specific requirements. While adhesive coat weight itself is usually a process-control issue rather than a direct OSHA recordkeeping item, the sheet helps demonstrate controlled production and traceability. If the adhesive or substrate has safety, food contact, or labeling implications, the same record can support broader compliance reviews.

Yes, and you should. The template is meant to reflect your actual line geometry, web width, applicator type, and product acceptance criteria. You can change the number of sample locations, add units such as gsm or lb/ream, and include job-specific limits or customer specifications.

An ad hoc checklist often confirms that someone looked at the line, but it does not consistently capture target, measured values, calibration status, or corrective action. This template creates a repeatable record that shows what was measured, where it was measured, and what happened when the result was outside tolerance. That makes it easier to troubleshoot drift, defend release decisions, and review trends over time.