BoSPS

The properties of a BoSPS film are sununarized and compared with bi-axially oriented films of other engineering plastics in Table 13.6. BoSPS has comparable mechanical properties with other engineering plastic films. Outstanding features of BoSPS are the dimensional stability against humidity, electrical properties, and transparency. 

The dimensional stability of BoSPS against a cyclic change of relative humidity is shown in Figure 13.18. BoSPS is very stable against humidity... 

The frequency dependence of the dielectric constant and the loss tangent of BoSPS is shown in Figure 13.20. In BoSPS, the low dielectric constant and the small loss tangent are unchanged over the wide range of frequency. 

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