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Run: Co-Extrusion Layer Ratio Verification Sheet

Verify each co-extruded layer matches the approved job spec before product is released. This sheet captures layer percentages, material grades, process setti...

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Inspection Details

Job number matches the production order

Enter the job number and confirm it matches the active production order or traveler.

Product name and structure code confirmed

Record the product name, structure code, or customer part number being verified.

Line, die, and run date/time recorded

Document the co-extrusion line identifier, die set, and verification timestamp.

Job Spec and Material Match

Approved job specification available at point of use critical (required)

Yes No N/A

Total layer structure matches the approved spec critical (required)

Confirm the number of layers and the specified structure order match the customer or internal specification.

Yes No N/A

Resin/material grade for each layer matches the spec

Select any layer materials that were verified against the approved formulation or bill of materials.

Target layer ratio setpoints entered correctly critical (required)

Verify the control recipe or setpoints reflect the approved target percentages for each layer.

Yes No N/A

Layer Percentage Verification

Layer 1 percentage within acceptable tolerance critical (required)

Record the measured percentage for the first layer and compare it to the approved target.

Barrier layer percentage within acceptable tolerance critical (required)

Record the measured barrier layer percentage and confirm it meets the customer structure requirement.

Seal layer percentage within acceptable tolerance critical (required)

Record the measured seal layer percentage and confirm it meets the customer structure requirement.

Other specified layer percentages within acceptable tolerance

Use this field for any additional layer percentage verification required by the job spec.

Total structure percentage equals 100% critical (required)

Confirm the total of all verified layer percentages equals the approved total structure.

Line Setup and Process Controls

Extruder feed rates match target ratios critical (required)

Verify each extruder feed rate or output setting is aligned to the approved layer ratio targets.

Yes No N/A

Melt temperatures within approved operating window

Record the melt temperature used for the run and confirm it is within the approved process window.

Die and feedblock configuration matches the structure critical (required)

Confirm the installed die/feedblock configuration matches the layer sequence and customer structure.

Yes No N/A

Process alarms or deviations reviewed

Confirm any active alarms, deviations, or adjustments were reviewed and documented before release.

Yes No N/A

Release and Attestation

Non-conformances documented and contained critical (required)

Record any deficiency, hold action, scrap, or rework disposition if the structure did not match the job spec.

Yes No N/A

Product released for production or shipment critical (required)

Confirm release only after the verified structure meets the approved specification.

Yes No N/A

Inspector signature

Inspector attestation that the verification was completed accurately.

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