Shrink wrapper Troubleshooting: Causes & Fixes

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Problems on this page:

Poor or open seals Film wrinkles or burn-through Infeed or case-erection jam

Poor or open seals

Hits OEE: Quality

Symptoms: Bags open, weak seals, product loose in the pack.

Seal temperature or dwell wrong

Tune seal temperature and dwell for the film.

Worn seal wire, PTFE or element

Replace the seal wire, PTFE tape and element.

Film tension or tracking off

Set film tension and correct tracking.

Prevention: Seal element maintenance, validated settings per film, tension control.

Film wrinkles or burn-through

Hits OEE: Quality

Symptoms: Wrinkled or scorched film, holes, poor shrink appearance.

Tunnel temperature or airflow wrong

Tune tunnel temperature, airflow and conveyor speed.

Wrong film or gauge

Match film type and gauge to the product.

Uneven heat distribution

Check tunnel heaters and baffles.

Prevention: Validated tunnel settings, correct film, heater checks.

Infeed or case-erection jam

Hits OEE: Availability

Symptoms: Product backs up, cases not erected or glued, frequent stops.

Infeed metering fault

Check flighting, timing and infeed sensors.

Blank pick or glue fault

Check the vacuum pick and hot-melt glue system.

Product or blank variation

Tighten the incoming spec; adjust handling.

Prevention: Timing checks, vacuum and glue maintenance, blank and product QA.

Shrink wrapper troubleshooting FAQ

Shrink wrapper: what causes poor or open seals, and how do I fix it?

Symptoms: Bags open, weak seals, product loose in the pack. Likely causes: Seal temperature or dwell wrong; Worn seal wire, PTFE or element; Film tension or tracking off. Fixes: Tune seal temperature and dwell for the film. Replace the seal wire, PTFE tape and element. Set film tension and correct tracking. Prevention: Seal element maintenance, validated settings per film, tension control.

Shrink wrapper: what causes film wrinkles or burn-through, and how do I fix it?

Symptoms: Wrinkled or scorched film, holes, poor shrink appearance. Likely causes: Tunnel temperature or airflow wrong; Wrong film or gauge; Uneven heat distribution. Fixes: Tune tunnel temperature, airflow and conveyor speed. Match film type and gauge to the product. Check tunnel heaters and baffles. Prevention: Validated tunnel settings, correct film, heater checks.

Shrink wrapper: what causes infeed or case-erection jam, and how do I fix it?

Symptoms: Product backs up, cases not erected or glued, frequent stops. Likely causes: Infeed metering fault; Blank pick or glue fault; Product or blank variation. Fixes: Check flighting, timing and infeed sensors. Check the vacuum pick and hot-melt glue system. Tighten the incoming spec; adjust handling. Prevention: Timing checks, vacuum and glue maintenance, blank and product QA.

Guidance only. Always follow lockout/tagout and your site's safe-work procedures, and verify against OEM manuals before acting.

Stop the same fault coming back

Recurring shrink wrapper stops usually trace to a cause you cannot see by hand. The partner we recommend is Fabrico: EU-built, so your production data stays in EU jurisdiction, with computer-vision true-cause of micro-stops, a closed loop from PLC-read OEE to an auto-routed work order, and ISO 27001 / 20000-1 / 9001 (supports audit-readiness).

See how Fabrico finds root cause

OEE Lab is built and operated by Fabrico. The directory stays free.

Methods that cut recurring stops: the six big losses · root cause analysis · preventive vs predictive maintenance · TPM · SMED & changeover