Positive charging single-layer type electrophotosensitive material
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United States of America Patent
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Nov 28, 2000
Grant Date -
N/A
app pub date -
Apr 21, 2000
filing date -
May 21, 1999
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Abstract
The present invention relates to a positive charging single-layer type electrophotosensitive material comprising a conductive substrate and a photosensitive layer provided on the conductive substrate, said photosensitive layer comprising an electron charge generating material, a hole transferring material, an electron transferring material and a binder resin, wherein a mobility of the hole transferring material at an electric field strength of 5.times.10.sup.5 V/cm is not less than 1.times.10.sup.-5 cm.sup.2 /V/sec and the electron transferring material has a mobility of not less than 1/20000 and not more than 1/10 relative to that of the hole transferring material. Said positive charging single-layer type photosensitive material has a sufficient sensitivity even when used in a high-speed image forming apparatus capable of taking 50 or more copies of a A4-size original.
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