A plastic membrane is a thin layer made of plastic material. It is often used to separate or seal things, like in packaging or construction, to provide protection or prevent leaks or seepage. Full definition
Missing even a tiny plastic membrane can make your breast pump pretty much useless. (expressing-mama.com)
Examples include shaped plastic membranes and closed - cell plastic foam boards. (astm.org)
An emerging approach to treating disease combines living cells with plastic membranes that shield the cells from immune attack (scientificamerican.com)