Dear Ruhollah, sorry to see that your interesting technical question has not yet received an expert answer. We work in synthetic inorganic chemistry, so that I would not call myself a proven expert in polymer chemistry. I assume that by "pre-treated propylene film" you mean polypropylene, right? My guess is that the sodium lauryl sulfate surfactant could play a key role in the unexpected performance of your pressure-sensitive adhesive (PSA). Perhaps the sodium lauryl sulfate is not compatible with the non-polar surface of polypropylene. In this context please have a look at the following potentially useful article entitled:
Unfortunatey this paper has not been posted as public full text on RG. However, the corresponding author has an RG profile (
https://www.researchgate.net/profile/Marc-Dube-2). Thus there is a good chance that you can request the full text directly from this author
via RG.
In this study the authors used either sodium dodecyl sulfate or partially hydrolyzed poly(vinyl alcohol) (= PVOH with a molecular weight of 22,000 and a degree of hydrolysis of 80%, commercially available from Cevol) as surfactant components. Apparently the partially hydrolyzed poly(vinyl alcohol) gave significantly better results on PET surfaces. Thus it might be worth a try using this PVOH in your experiments too.
