The following fields were updated due to additional information: d10: device available for eval yes, d10: returned to manufacturer on: 25-jan-2023 h6: investigation summary: our quality engineer inspected the samples and photographs submitted for evaluation.The three photographs displayed similarities to that of the returned units.Through the visual inspection of the returned units, 39 of the returned units had sections of the bottom web that had been separated from the top web.The reported issue was confirmed.Further inspection revealed the bottom web had varying degrees of wrinkling including in the seal area.Sections where the seal was still intact had evidence of adhesive residue, although, the adhesive appeared more degraded when comparing to a representative unit.The imprint from the seal machine was present and consistent around the seal area.Finally, when looking at the bottom web against a light source, discoloration of the bottom web could be observed.Based on these observations, it is likely that the seal was adequately formed during packaging of the unit since there is evidence of the adhesive being present/activated and there is evidence that the heated press adequately pressed down on the entirety of the seal.Additionally, given the warping of the bottom web and its discoloration it is likely that the returned units were exposed to environmental factors, like humidity, that damaged the bottom web and degraded the seal.This type of damage may be caused postproduction during shipping or storage (at the customer site) due to inadequate storage/transportation conditions.A device history record review showed no non-conformances associated with this issue during the production of this batch.
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