Depending on the type of alcohol-based solvent used, the effect on a TPU may differ.
Aliphatic alcohols such as ethanol and isopropanol can trigger slight swelling. More obvious
levels of distortion can occur with exposure to aliphatic esters and ketones including
acetone, methyl ethyl ketone (MEK) and cyclohexanone. Strong polar organic solvents like
dimethyl formamide (DMF) and dimethyl sulfoxide (DMSO) can dissolve TPU altogether