Protective agent block, method of manufacturing the same, process cartridge, and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorsToshiyuki Kabata, Momoko Shionoiri
Life of this patent
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Abstract
A protective agent block including metal soap; and boron nitride, wherein the weight ratio Mr of boron nitride to the metal soap is calculated from the relationship 1 based on Raman spectrum measured at each of multiple places on the protective agent block and the average of the measured weight ratios Mr ranges from 0.050 to 0.330 with a variation coefficient of 0.075 or less: Mr=(log(ABN/ASP)+1.3588)/7.7374 Relationship 1 where ABN represents a peak area in a range of from a wavenumber of 1377.837 cm−1 to 1354.695 cm−1 and ASP represents a peak area in a range of from a wavenumber of 1481.012 cm−1 to 1420.264 cm−1.
Claims8
A protective agent block manufactured by a method comprising:
- particulating a mixture comprising metal soap and boron nitride to obtain protective agent particles having an average particle diameter of from 30 μm to 300 μm comprising the metal soap and boron nitride;
- and
- compacting the protective agent particles to obtain the protective agent block.
A protective agent block comprising:
- metal soap;
- and
- boron nitride,
- wherein a weight ratio Mr of boron nitride to the metal soap is calculated from the relationship 1 based on Raman spectrum measured at each of multiple places on the protective agent block and an average of the measured weight ratios Mr ranges from 0.050 to 0.330 with a variation coefficient of 0.075 or less:
- Mr=(log(ABN/ASP)+1.3588)/7.7374 Relationship 1
- where ABN represents a peak area in a range of from a wavenumber of 1377.837 cm−1 to 1354.695 cm−1 and ASP represents a peak area in a range of from a wavenumber of 1481.012 cm−1 to 1420.264 cm−1.
Dependencies are inferred from the claim text.