Air corona treatment

Figure 7A. Spectra of polypropylene (PP) films before air corona treatment.

Introduction of vapor of acrylic acid (AAc) monomer into the corona region has proved successful. Surface wettability of BOPP films were improved (surface energy increased) by comparison with the standard air corona treatment (Table 3.4). The hydrophilicity lasted for more than 90 days of aging (Figure 3.7). 

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