We have studied the relationship between electrical conductivity or photoconductivity and structure of nylon 6 drawn. Structural change by the cold uniaxial stretching was examined by the polarized infrared absorption spectra.
As the drawn ratio grows larger, the degree of orientation from the dichroic value increased. Especially, the dichroic value of the amide band increased steeply at first, while other bands saturated slowly with increasing stretching. The amorphous parts are converted into the crystal parts by stretching. The stretching are attributed to morphological changes in nylon. The ratio of absorption density of 935 cm^-1 to 1, 125 cm^-1 increased with drawn ratio.
The conductivity and photoconductivity decreased with drawn ratio. The anisotropy of conductivity and photoconductivity of nylon 6 were observed. The photoconductivity in the stretching direction (perpendicular cell) is larger than that in the transverse direction (parallel cell). The conductivity appears to be extremely sensitive to polymer crystallinity and morphology. The anisotropy of conductivity is considered to be caused by the change of the aggregation in amophous parts which plays an important role for the ionic conduction.

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Electrostatic toner image transfer is studied theoretically and experimentally. Three transfer methods are investigated. These are corona transfer, conductive roller transfer and dielectric roller transfer. The dielectric roller is a conductive rubber roller covered with thin dielectric layer.
Experiments shows that the dependence of transfer ratio on the electric field between transfer material and toner layer is almost the same for these three transfer methods. Transfer ratio has a maximum value at electric field of 36 MV/m. Theoretical analysis shows that the limitation of transfer speed is 6.7 m/s for corona transfer and 125 m/s for roller transfer.
At the optimum transfer condition, toner images are transferred on a plain paper with transfer ratio of more than 80% at a paper speed up to 2 m/s.

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