Polymers· 2026Q1
Film Recovery Constraints on Optical and Gravimetric Assessment of Pulsed Gas–Solid Cleaning of Model Plastic Films
- 1citations
- Q1SCImago
- 2026year
Short summary
Mass changes from pulsed gas-solid cleaning of plastic films are significantly biased by which films are included in post-cleaning weighing, with 31% of runs meeting a count-matched criterion and 10 of 21 groups lacking eligible gravimetric data.
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Key points
- Only 31.0% of 84 model film runs met a count-matched weighing criterion for gravimetric assessment after pulsed gas-solid cleaning.
- Ten out of 21 experimental groups lacked any eligible gravimetric observation due to film recovery issues.
- Assigning mean mass to unweighed pieces in one incomplete run introduced a 19.5 percentage point bias in the unrestricted gravimetric index.
- Optical normalization introduced conditional sampling uncertainties ranging from 0.33–0.99 percentage points.
- Different mass configurations (5g vs. 3g PE) showed significant differences in optical recovery (15.2 percentage points) despite similar film count recovery.
AI-generated from the title and abstract; the full text is not read.
Abstract
Cleaning-induced mass changes depend on which films enter the post-cleaning weighing. This study quantifies that dependence using 84 model film runs in an established pulsed gas–solid apparatus and a laboratory stirred water reference. The count-matched weighing criterion retained 26 runs (31.0%): 24.0% of dry cleaning runs and 88.9% of stirred water reference runs. Ten of 21 groups had no eligible gravimetric observation. In one incomplete recovery run, assigning the mean initial clean film mass to the unweighed piece gave a scenario contribution of 19.5 percentage points of the unrestricted gravimetric index, illustrating potential bias without correcting the observation. Optical normalization denominators ranged from 68.0 to 76.2 percentage points; separately selected films introduced a conditional sampling uncertainty component of 0.33–0.99 percentage points in optical recovery. At 120 s, the nominal 5 g polyethylene (PE) configuration had 15.2 percentage point lower mean optical recovery than the 3 g configuration despite similar film count recovery. Reporting recovery-dependent coverage alongside each endpoint keeps laboratory comparisons tied to the film populations actually measured.
The authors' abstract, as published at the source. Polymers, 2026 · DOI ↗
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