Method of forming electrophotographic photoreceptor and method of drying coating film
First Claim
1. A method of forming an electrophotographic photoreceptor having conductive substrate and a photosensitive layer, comprising the steps of:
- coating a coating solution containing ingredients of the photosensitive layer and a solvent medium containing one or more kinds of solvent on a conductive substrate thereby forming a coating film; and
drying the formed coating film by heating by means of one or more of heating methods selected from the group consisting of a far infrared ray heating method, a microwave heating method, a dielectric heating method, and an induction heating method, in an air stream at a temperature of 50°
C. or higher and 130°
C. or less, wherein the solvent medium contains 30% by weight or more of a solvent having a relative evaporation rate of less than 1.7, where the relative evaporation rate of the solvent is defined as a ratio between a time for evaporating n-butyl acetate and a time for evaporating the solvent.
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Abstract
A method of forming an electrophotographic photoreceptor capable of forming a smooth coating film free of pinholes, bubbles, surface unevenness, etc. in a short time as a coating film for forming a photosensitive layer is provided. The method includes heating and drying a coating film formed by coating a coating solution containing ingredients of the photosensitive layer and a solvent medium containing 30% by weight or more of a solvent having a relative evaporation rate of less than 1.7 represented by the following formula (1) in an air stream at a temperature of 50° C. or higher and 130° C. or lower supplied from a blowing nozzle, by a far infrared ray heating method and an induction heating method, by using, for example, a drying apparatus, thereby manufacturing the electrophotographic photoreceptor:
(relative evaporation rate)=(time for evaporating n-butyl acetate)/(time for evaporating solvent) (1)
13 Citations
4 Claims
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1. A method of forming an electrophotographic photoreceptor having conductive substrate and a photosensitive layer, comprising the steps of:
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coating a coating solution containing ingredients of the photosensitive layer and a solvent medium containing one or more kinds of solvent on a conductive substrate thereby forming a coating film; and
drying the formed coating film by heating by means of one or more of heating methods selected from the group consisting of a far infrared ray heating method, a microwave heating method, a dielectric heating method, and an induction heating method, in an air stream at a temperature of 50°
C. or higher and 130°
C. or less,wherein the solvent medium contains 30% by weight or more of a solvent having a relative evaporation rate of less than 1.7, where the relative evaporation rate of the solvent is defined as a ratio between a time for evaporating n-butyl acetate and a time for evaporating the solvent. - View Dependent Claims (2, 3)
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4. A method of drying a coating film formed by coating a coating solution containing ingredients for the coating film and a solvent medium containing over one or more kinds of a solvent on a substrate, comprising the step of;
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drying the formed coating film by heating by means of one or more of heating methods selected from the group consisting of an far infrared ray heating method, a microwave heating method, a dielectric heating method, and an induction heating method in an air stream at a temperature of 50°
C. or higher and 130°
C. or less,wherein the solvent medium contains 30% by weight or more of a solvent having a relative evaporation rate of less than 1.7, where the relative evaporation rate of the solvent is defined as a ratio between a time for evaporating n-butyl acetate and a time for evaporating the solvent.
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Specification