Why is shrink film loose, split or wrinkled?
Match film type, gauge, size and orientation to the product, create a sound seal, then balance tunnel temperature, airflow and dwell instead of treating every fault with more heat.
What should I check first?
Record the machine state and the finished result before changing settings. This helps identify where control is first being lost.
- Confirm film, sleeve, liner or foil specification and its approved container or closure.
- Inspect the sealing face for product, dust, moisture, wrinkles or moulding defects.
- Record time, temperature, pressure, power, line speed and gap settings.
- Run start-up, steady production and restart samples—not one ideal pack.
- Perform an agreed peel, leak, burst, visual or tamper-evidence test.
Why is this production problem happening?
Work from the evidence and change one variable at a time. These are the most relevant causes to investigate first.
- Packaging materials are not compatible with each other.
- The sealing interface is contaminated or physically uneven.
- Heat, pressure, dwell, airflow or coupling is non-uniform.
- The pack enters the process off-centre or with poor spacing.
- Settings compensate for a previous fault and over-process the material.
How can I correct or improve it?
Make a controlled change, repeat the same measurement and compare the result before moving to the next adjustment.
- Approve a controlled material specification and supplier sample.
- Remove the upstream source of contamination or misalignment.
- Optimise one variable at a time and retain tested recipes.
- Add cooling, hold-down or inspection where the process needs it.
- Validate seal integrity over the full production and format range.
What should I send Lancing?
The most reliable recommendation is based on representative production materials and a measurable acceptance result.
- Pack, closure, liner, film or sleeve specifications
- Photos of good and failed seals from several positions
- Product contamination and environmental details
- Current settings, speed and test method
- Required tamper, leak or presentation acceptance criteria
Which applications does this answer cover?
More quick answers about this problem
What should I check first for shrink wrapper?+
Confirm film, sleeve, liner or foil specification and its approved container or closure.
Why does this problem happen with shrink wrapper?+
Packaging materials are not compatible with each other.
How can I improve or correct the problem with shrink wrapper?+
Approve a controlled material specification and supplier sample.
Which part of the production line does this question relate to?+
This question relates primarily to sealing, sleeving & shrink wrapping. It may also be affected by upstream product or pack supply and by downstream handling, so check the full production sequence rather than one machine in isolation.
What should I send when asking for a machinery recommendation?+
Send Pack, closure, liner, film or sleeve specifications; Photos of good and failed seals from several positions; Product contamination and environmental details; Current settings, speed and test method. Representative production samples and a measurable acceptance target are normally more useful than a catalogue description alone.
Explore the relevant Lancing machinery options
Review suitable equipment and application guidance, then request a recommendation based on your product, pack and required accepted output.
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