JP3420431B2 - Elastic blade for regulating developer amount and developing device using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developer amount regulating elastic blade used for developing and visualizing an electrostatic latent image formed on an image carrier, and a developing device using the elastic blade.

[0002]

2. Description of the Related Art As a conventional developing apparatus, as shown in FIG. 6 , an electrophotographic photosensitive member 1 is provided with a minute interval, and a developing container 2 is provided.
Of the developer carrying member 3 (hereinafter also referred to as a developing sleeve), a developer amount regulating elastic blade 14 (hereinafter also referred to as an elastic blade), an elastic roller 5 and a one-component developer 6 (hereinafter also referred to as a toner). Things are known.
As a means for restricting the thickness of the toner layer carried and carried by the developing sleeve to the developing section to a thin layer, an elastic blade is brought into contact with the developing sleeve, and toner is passed between the elastic blade and the abutting portion of the developing sleeve. A method is adopted in which a thin layer of toner is formed on the developing sleeve by regulation, and frictional charge (tribo) for developing a latent image is applied to the toner by friction at the contact portion.

As such an elastic blade, there are a resin plate and a laminate of these in addition to a rubber plate and a metal thin plate.

As a positive toner, a support layer in which a charge-imparting layer such as charge-controlled silicone rubber is laminated on a thin plate such as metal is used.

For negative toner containing magnetite, a urethane rubber plate subjected to charge control treatment is used.

On the other hand, from the viewpoint of energy saving, a low melting point toner (sharp melt toner) for fixing at a temperature lower than the conventional one has a problem that the toner adheres to the developing blade to cause an image defect, and thus the developing blade has a problem. Toner fusion can be reduced by reducing the contact pressure between the developing sleeves.

However, when the contact is carried out with a light pressure, the surface material of the developing blade needs to have a higher frictional charging ability,
It has been found that the conventionally used materials such as urethane rubber lack the triboelectrification ability.

As for non-magnetic toner due to colorization,
Since the toner itself does not have magnetism, it is necessary to give a high frictional charge to the toner to coat it on the developing sleeve, but if urethane rubber is used as the surface material of the developing blade, it will be triboelectrically charged as described above. Polyamide is used as the surface layer material as a material having a high triboelectrification capacity because of its insufficient capacity.

However, when polyamide is used as the surface layer material of the developing blade, the charge-up of a general non-magnetic toner occurs in a low humidity environment.
When the charge is increased, the triboelectric charge of the toner becomes high, the toner does not fly from the developing sleeve onto the photosensitive drum, and an image defect occurs.

Further, in order to improve the image quality and the full color of an image by applying the electrophotographic process, more uniform pressure contact with the developing sleeve is required such as the particle size of the toner is further reduced. Since there is a limit to the uniform pressure contact of the developing sleeve in the longitudinal direction of the developing sleeve, there is also a limit to the uniform charge imparting property and the application of the toner with a uniform thickness to the developing sleeve, and image defects such as image unevenness and streaks are found. It was

[0011]

SUMMARY OF THE INVENTION An object of the present invention is to provide a developer amount controlling elastic blade which can prevent the charge up of the developer and which does not cause image defects such as unevenness and streaks, and a developing device using the same. To provide.

It is another object of the present invention to provide a developer amount regulating elastic blade which does not cause image defects such as unevenness and streaks, and a developing device using the same.

[0013]

Developer amount controlling elastic blade according Means and operation for solving the problems] The present invention Chi lifting charge imparting layer having a polyamide elastomer surface, a polyamide elastomer
Is a carboxyl whose terminal amino group is carboxylated
Block copolymer of modified polyamide and polyether
Characterized in that there.

Further, according to the present invention, a developer accommodating container for accommodating a one-component developer, a developer carrying member for carrying and carrying the developer from the container to a developing section, and a developing applied on the surface of the developer carrying member. In a developing device having a developer amount regulating member that regulates the amount of developer, the developer amount regulating member has the above structure.
It is an elastic blade having on its surface a charge-imparting layer having a synthetic polyamide elastomer.

[0015]

[0016]

Since the elastic blade having the charge-imparting layer having the polyamide elastomer according to the present invention has a property that the polyamide elastomer imparts a proper frictional charge to the developer, the charge-up of the developer is prevented,
High image density can be realized. Further, since the polyamide elastomer has elasticity, the pressure contact force between the developer carrier and the elastic blade does not vary locally, and the developer is evenly distributed on the developer carrier. In addition, the toner can be held with a uniform triboelectric charge amount, and as a result, a good image without image defects such as unevenness and streaks can be formed.

Further, in another elastic blade of the present invention, since the sponge elastic layer is provided between the support layer and the charge-imparting layer, the developer carrying member and the charge-imparting layer of the elastic blade are pressed against each other. It is possible to more completely prevent the force from varying locally. As a result, the developer can be held on the developer carrier with a uniform thickness and a uniform triboelectric charge amount, and a good image without image defects such as unevenness and streaks can be formed. It is a thing.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows a developer amount regulating elastic blade 4 of the present invention, in which 4a is a support layer and 4c is a charge imparting layer.

At least the surface of the charge imparting layer 4c is made of polyamide elastomer. A preferred elastomer for the polyamide elastomer is polyether block amide, which is a block copolymer of polyamide and polyether. Block copolymers of polyether and polyamide show triboelectric charging ability due to the polyamide component and elasticity due to the polyether component, so when used as a developer amount regulating elastic blade, a coating or additive for improving the triboelectric charging property. It is possible to obtain a developer amount controlling blade having excellent productivity without the addition of Further, if it is configured with a support layer, it is possible to prevent image defects due to a decrease in contact pressure between the developer carrying member and the developer amount regulating blade due to permanent deformation (depression).

As the polyamide of the block copolymer of polyamide and polyether, polyamide 6,6.
6,6,10,6,12,11,12,12,12 and polyamides obtained by polycondensation of different monomers of these polyamides, and the like. Preferably, the terminal amino group of the polyamide is A carboxylated product is used.

As the dibasic acid, oxalic acid, succinic acid,
Aliphatic saturated dicarboxylic acids such as adipic acid, suberic acid, sebacic acid and dodecanedioic acid; aliphatic unsaturated dicarboxylic acids such as maleic acid; aromatic dicarboxylic acids such as phthalic acid and terephthalic acid; and these dibasic acids Polydicarboxylic acids synthesized from diols such as ethylene glycol, butanediol, hexanediol, octanediol and decanediol are used.

The polyether component includes homopolymerized or copolymerized polyether diols such as polyethylene glycol, polypropylene glycol and polytetramethylene glycol, and polyether diamines aminated at both ends. A block copolymer of a polyether and a polyamide having an ester bond (polyether polyester polyamide) or an amide bond (polyether polyamide) is formed from the carboxylated polyamide.

The polyamide component in the polyamide elastomer structure is 20 wt% in that the developer is sufficiently tribocharged.
% Or more, and from the viewpoint of realizing good elasticity of the polyamide elastomer and preventing the charge-up of the developer, the polyamide component is preferably 80 wt% or less.

Here, as a method for evaluating the triboelectrification ability of the charge-imparting layer of the elastic blade, the elastic blade and the developing sleeve are attached to the developing device, and the developer contained in the developing device is rotated by rotating the developing sleeve. The toner is conveyed and charged by frictional charging with the elastic blade to uniformly apply the charged toner onto the developing sleeve. From the charge amount (Q) and weight (M) values obtained by sucking the toner, the toner charge amount Q / M (μC / μC /
The method of calculating g) can be adopted. This toner charge amount Q
The value of / M is suitable for the evaluation of the triboelectrification ability because the numerical value varies depending on the triboelectrification property of the charge-giving layer of the elastic blade.

As the support layer, (1) a flat plate made of metal, for example, a stainless steel plate (tensile strength of about 110 kg)
/ Mm ² ), a phosphor bronze plate (about 65 kg / mm ^{2 for the} same), an aluminum plate (about 40 kg / mm ^{2 for the} same), and a thickness of 20 μm to 500 μm is preferable for controlling the pressure contact with the developing sleeve.
(2) Further, a resin flat plate such as a polyethylene terephthalate resin plate (tensile strength of about 20 kg / mm ² ), a polycarbonate resin plate (about 10 kg / mm ² ), a stretched polypropylene resin plate (about 19 kg / mm ² ), etc. so,
The thickness is preferably 50 μm to 1000 μm. Especially for the resin plate, a biaxially stretched one having a small creep is more preferable.

On the other hand, another developer amount regulating elastic blade according to the present invention has a constitution which has a support layer for regulating the pressure, a sponge layer as the elastic layer, and a charge giving layer for regulating the charge amount.

The contact of the elastic blade with the developing sleeve is
The less elastic nature of the sponge layer makes it spatially uniform. Particularly, when the charge-imparting layer is made of a hard material such as resin, a more remarkable effect can be obtained.

FIG. 3 is a schematic view of another developer amount regulating elastic blade according to the present invention, in which 4a is a support layer,
Reference numeral 4b represents a sponge elastic layer, and 4c represents a charge giving layer.

The material forming the support layer is the same as described above.

As the sponge for the elastic layer, either rubber or resin foamed with a foaming agent may be used, more preferably foamed one having a uniform density is preferable, and hardness is JI.
The SA hardness is more preferably 50 degrees or less. The elastic layer preferably has a thickness of 0.1 to 3 mm.

As the foaming agent, any one such as a physical foaming agent or a decomposition type foaming agent may be used. As the physical foaming agent, a volatile compound which is a liquid at normal pressure and has a boiling point of 110 ° C. or less. Is used, aliphatic hydrocarbons such as propane, pentane and hexane, chlorinated aliphatic hydrocarbons such as methylene chloride and trichloroethylene, fluorinated aliphatic hydrocarbons such as trichlorofluoromethane and dichlorotetrafluoroethane, air, An inert gas such as nitrogen is used. The decomposition type foaming agents include inorganic foaming agents and organic foaming agents, and the inorganic foaming agents include sodium bicarbonate, ammonium carbonate, magnesium carbonate, ammonium nitrite and the like. Examples of the organic foaming agent include azo foaming agents such as azodicarbonamide, azobisformamide, azobisisobutyronitrile and diazoaminobenzene, N,
N'-dinitrosopentamethylenetetramine, NN '
-Nitroso-based blowing agents such as dimethyl-N, N'-dinitrosoterephthalamide, benzenesulfonyl hydrazide, toluenesulfonyl hydrazide, hydrazide-based blowing agents such as p, p'-oxybis (benzenesulfonylhydrazide), p-toluenesulfonyl semicarbazide And the like, and hydrazone-based foaming agents such as acetone-p-sulfonylhydrazone.

These foaming agents may be used alone or as a mixture of two or more kinds, and if necessary, a foaming auxiliary agent such as urea may be appropriately mixed with rubber or resin in an appropriate amount, heat-molded and foamed to obtain a desired hardness. Form a sponge body.

The urethane rubber forms a sponge body by being foamed with water or the like in addition to the physical foaming agent and the decomposition type foaming agent described above. Also, a sponge body is formed by the decomposition gas of the silanol reaction of the silicone rubber. The sponge body thus formed is processed into a predetermined shape by cutting, polishing, etc., and adhesively fixed to the support layer.

As the charge-imparting layer, silicone rubber or silicone resin is preferably used for positive toner, urethane rubber or urethane resin is used for negative magnetic toner, and negative non-magnetic color toner is used. Is a polyamide elastomer or polyamide resin. These members are used by bonding a coat or a sheet on the sponge layer. The thickness of the charge imparting layer is preferably 2 μm or more.

In the elastic blade thus formed, the hardness of the sponge layer and the charge imparting layer is preferably 50 degrees or less in Asker C hardness. If the hardness is high, the contact between the elastic blade and the developing sleeve is in line contact, and the contact pressure is likely to vary in the sleeve axial direction due to an assembly error of the developing machine, and streak defects are likely to occur in the image.

Further, when the sponge layer and the charge-imparting layer are formed at the same time, the charge-imparting layer having a good surface roughness can be obtained and more uniform contact can be achieved. As a forming method, a foaming agent such as rubber or a resin material is mixed and foam-molded in a mold to transfer a mirror-shaped mold surface to form a skin layer on the surface of the sponge layer, which is used as a charge-imparting layer. And an elastic blade with good surface accuracy was made. FIG. 4 schematically shows an elastic blade provided with an elastic layer 4d having a skin layer as a charge providing layer by this simultaneous formation.

In this case, as the foaming agent, a decomposable organic foaming agent is more preferable from the viewpoint of the environment, because the decomposition temperature is sharp and the decomposition temperature is promoted and the decomposition temperature is lowered when used in combination with an auxiliary agent. As for urethane rubber and resin, a material mixed with water, a physical foaming agent, etc. was put in a mold and similarly foamed in the mold to simultaneously form a sponge layer and a charge-imparting layer. Similarly, a sponge body and a charge-imparting layer were simultaneously formed by foaming in a mold with a decomposition gas of a silanol reaction of silicone rubber. In both cases, the hardness of the sponge layer and the charge-imparting layer was preferably asker C hardness of 50 degrees or less.

Incidentally, forming a polyamide elastomer layer on the sponge elastic layer is also a preferred embodiment.

Next, a developing device using the elastic blade of the present invention will be described.

FIG. 2 is an example of a schematic configuration diagram of the developing device. Reference numeral 2 is a developing container containing toner 6, and the main developing device is a toner carrier in the developing container 2 in the direction of arrow a in the figure. A developing sleeve 3 is provided so as to face the photoconductor 1 of the rotating image carrier, and the electrostatic latent image on the photoconductor 1 is developed and visualized as a toner image. The developing sleeve 3 has a right semicircular surface protruding into the developing container 2 and a left semicircular surface exposed to the outside of the developing container 2 as viewed in the figure, and is rotatably laterally arranged so as to face the photoconductor 1. It is set up. A slight minute gap is provided between the developing sleeve 3 and the photoconductor 1. The developing sleeve 3 is arranged with respect to the rotation direction a of the photoconductor 1.
It is rotationally driven in the direction of arrow b.

Further, in the developing container 2, an elastic blade 4 of the present invention is provided above the developing sleeve 3, and an elastic roller 5 is provided at a position upstream of the elastic blade 4 in the rotational direction of the developing sleeve 3. It is provided.

The elastic blade 4 is provided so as to be inclined downward toward the upstream side in the rotational direction of the developing sleeve 3, and abuts on the outer peripheral surface of the upper portion of the developing sleeve 3 so as to face the rotational direction.

The elastic roller 5 is in contact with the portion of the developing sleeve 3 opposite to the photosensitive member 1 and is rotatably supported.

In the developing device having the above structure, the elastic roller 5 rotates in the direction of arrow c, and the rotation of the elastic roller 5 carries the toner 6 and supplies the toner 6 in the vicinity of the developing sleeve 3. The toner 6 on the elastic roller 5 is rubbed against the developing sleeve 3 at the contact portion (nip portion) where the toner 5 and the developing roller 5 come into contact with each other, and thus adheres to the developing sleeve 3.

After that, as the developing sleeve 3 rotates, the toner 6 attached to the developing sleeve 3 enters between the elastic blade 4 and the developing sleeve 3 at the abutting portion thereof, and develops when passing therethrough. Surface of sleeve 3 and elastic blade 4
Both are rubbed against each other and are sufficiently frictionally charged.

The toner 6 charged as described above is
A thin layer of toner 6 is formed on the developing sleeve 3 by passing through the abutting portion between the elastic blade 4 and the developing sleeve 3, and the toner is conveyed to the developing portion facing the photoconductor 1 with a minute gap therebetween. . Then, by applying an alternating voltage, for example, a direct current and an alternating current, as a developing bias between the developing sleeve 3 and the photoconductor 1 in the developing section, the toner 6 on the developing sleeve 3 is electrostatically latent on the photoconductor 1. The image is transferred corresponding to the image, adhered to the electrostatic latent image, developed, and visualized as a toner image.

The toner 6 remaining on the developing sleeve 3 without being consumed for development in the developing section is collected in the developing container 2 from below the developing sleeve 3 as the developing sleeve 3 rotates.

The collected toner 6 is peeled off from the developing sleeve 3 at the contact portion with the developing sleeve 3 by the elastic roller 5. At the same time, new toner 6 is supplied onto the developing sleeve 3 by the rotation of the elastic roller 5, and the new toner 6 is conveyed again to the contact portion between the developing sleeve 3 and the elastic blade 4.

On the other hand, most of the peeled toner 6 is conveyed into the toner 6 in the developing container 2 as the elastic roller 5 rotates, and is mixed and peeled off.
The electric charge of is dispersed.

As the toner, known magnetic toner, non-magnetic color toner, etc. are used, and those having an average particle diameter of 3 to 15 μm are preferable.

FIG. 5 shows an example of an electrophotographic apparatus suitable for adopting the developing device of the present invention.

In the figure, reference numeral 11 denotes a photosensitive member as a member to be charged. In this example, a drum type electron having a conductive support such as aluminum and a photosensitive layer formed on the outer peripheral surface thereof as a basic constituent layer is used. It is a photographic photoreceptor. It is rotationally driven around the spindle at a predetermined peripheral speed in the clockwise direction in the drawing.

The charging member 12 is a corona discharger which is in contact with the surface of the photoconductor 11 to uniformly perform a primary charging process on the photoconductor surface to a predetermined polarity and potential.

The surface of the photoconductor 11 that has been uniformly charged by the charging member 12 is then subjected to exposure of the target image information (laser beam scanning exposure, slit exposure of the original image, etc.) by the exposure means L, thereby An electrostatic latent image 13 corresponding to desired image information is formed on the peripheral surface.

The latent image is then sequentially visualized as a toner image by the developing device 14.

This toner image is then transferred to the transfer means 15
Thus, on the surface of the transfer material P, which is conveyed from the sheet feeding unit (not shown) to the transfer unit between the photosensitive member 11 and the transfer unit 15 at an appropriate timing in synchronism with the rotation of the photosensitive member 11,
Transferred in sequence. The transfer means 12 of this example is a corona discharger, and the toner image on the surface of the photoconductor 11 is transferred to the surface side of the transfer material P by charging the transfer material P from the back with a polarity opposite to that of the toner.

The transfer material P on which the toner image has been transferred is separated from the surface of the photoconductor 11 and is forwarded to the heating and fixing roll 18 to be subjected to image fixing and output as an image-formed product.

The surface of the photoreceptor 11 after the image transfer is subjected to removal of adhered contaminants such as toner remaining after transfer by the cleaning means 16 to be a cleaning surface, and is repeatedly used for image formation.

A plurality of elements of the electrophotographic apparatus such as the photoconductor, the charging member, the developing device and the cleaning means can be integrally incorporated in the process cartridge. By doing so, the process cartridge can be attached to and detached from the apparatus main body. For example, the photosensitive member, the developing device, and if necessary, the charging member, the cleaning means, and the like may be integrally incorporated in the process cartridge, and the guide member such as the rail of the main body of the apparatus may be detachably configured.

As the electrophotographic apparatus which can use the developing apparatus of the present invention, there are a copying machine, a laser beam printer, an LED.
Examples thereof include a printer or an electrophotographic application device such as an electrophotographic plate making system.

[0062]

EXAMPLES Next, examples of the present invention will be described.

Example 1 A supporting layer is a phosphor bronze plate (plate thickness 0.12 m) having spring elasticity.
m, width 22 mm, length 21 on the side to which the charge-imparting layer is applied
0 mm). This support layer was previously installed in a mold, a polyamide elastomer was used as a charge-imparting layer, 12-nylon was used as a polyamide component, dodecanedioic acid was reacted as a dibasic acid, and polytetramethylene glycol was added as a polyether component. Polyamide component content was 10% by weight and was synthesized at 70 ℃.
After drying for an hour, it is directly molded by injection molding into a mold equipped with a support layer at a melting temperature of 200 ° C. and a mold temperature of 30 ° C., and an elastic blade having a thickness of 1 mm, a width of 5 mm, and a length of 210 mm for the charge imparting layer Was produced.

Example 2 As the charge-imparting layer, the polyamide component content was 3% by weight.
An elastic blade was produced in the same manner as in Example 1 except that 0% polyamide elastomer was synthesized and used.

Example 3 As a charge-imparting layer, a polyamide component-containing weight percentage of 50 was used.
% Polyamide elastomer, and
After drying for an hour, an elastic blade was produced in the same manner as in Example 1 except that it was molded at a melting temperature of 200 ° C.

Example 4 A polyamide component-containing weight percentage of 70 was used as the charge-imparting layer.
% Polyamide elastomer, and
After drying for an hour, an elastic blade was produced in the same manner as in Example 1 except that it was molded at a melting temperature of 240 ° C.

Example 5 As a charge-imparting layer, a polyamide component-containing weight percentage of 90 was used.
An elastic blade was produced in the same manner as in Example 4 except that a polyamide elastomer of 10% was synthesized and used.

Comparative Example 1 As the charge-imparting layer, a hardness of 65 degrees (JIS-A) and an ethylene adipate polyester urethane rubber having a thickness of 1 mm were used.
The sheet was molded into a sheet, adhered to the support layer, and cut to prepare an elastic blade.

Comparative Example 2 As the charge-imparting layer, alcohol-soluble nylon (trade name: Amilan CM-8000;
An elastic blade was prepared in the same manner as in Comparative Example 1 except that a methanol solution of Toray Industries, Inc. was coated by dipping.

The elastic blade produced as described above and the aluminum tube were blasted to obtain a ten-point average roughness Rz = 2.5 μm.
The developing sleeve was attached to the developing device so that the contact pressure between the elastic blade and the developing sleeve was 18 g / cm, and the developing sleeve was coated with toner and left without being developed. A sponge roller made of urethane foam, which works to peel off the toner and return it to the developing container again, is mounted, contains non-magnetic toner, and is kept in a low temperature and low humidity environment of 15 ° C. and 10 RH% under a laser beam printer (Laser).
(Shot; made by Canon), observe the coated state of the toner on the developing sleeve when the developing sleeve is driven,
The presence or absence of streaks and unevenness was visually confirmed, and the toner charge amount (tribo) was measured. In addition, the image density when a solid black image was output on paper using non-magnetic black toner was measured by a Macbeth densitometer. The evaluation results of each material are shown in Table 1.

As is clear from Table 1, Comparative Example 1 did not show sufficient triboelectric charging property and the tribo value was low,
The toner coated state on the developing sleeve also had streaks and unevenness, and the inside of the developing device was contaminated by the scattering of toner. Therefore, the density of the solid black image was also low. On the other hand, in Examples 1 to 5, since sufficient triboelectrification was exhibited, a high tribo value was obtained and the density of the solid black image was also a sufficient value. However, in Example 1, since the tribo value was lower than in Examples 2 to 4, slight streaks and unevenness occurred in the toner coat state on the developing sleeve, and the density of the solid black image was a slightly low value. It was In addition, in Example 5,
As can be seen from the tribo value, the reason why slight streaks and unevenness occurred in the toner coated state on the developing sleeve was due to the charge-up of the toner under low temperature and low humidity, and the density of the solid black image also became a little low value. It was The effect of charge-up also appeared in Comparative Example 2 and showed a lower solid black image density.

[0072]

[Table 1]

[0073]

[0074]

[0075]

[0076]

[0077]

[0078]

[0079]

[0080]

[0081]

[0082]

The elastic blade having the charge-imparting layer having the polyamide elastomer according to the present invention exhibits sufficient triboelectrification ability in a single layer, and the triboelectrification ability can be appropriately controlled, so that image defects due to charge-up occur. It is possible to provide a developer amount regulating member that does not.

[0083]

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an example of usage of a developer amount regulating elastic blade of the present invention.

FIG. 2 is an explanatory diagram of an example of a developing device of the present invention.

FIG. 3 is an explanatory diagram of a configuration of an example of a developer amount regulation elastic blade of the present invention.

FIG. 4 is an explanatory diagram of a configuration of an example of a developer amount regulation elastic blade of the present invention.

FIG. 5 is an explanatory diagram of a configuration of an example of an electrophotographic apparatus to which the developing device of the present invention is applied.

FIG. 6 is an explanatory diagram of a configuration of a developing device using a conventional developer amount regulating elastic blade.

[Explanation of symbols]

1, 11 Electrophotographic photoreceptor 2 Container 3 Developing sleeve 4 Developer amount regulating elastic blade 4a Support layer 4b Sponge elastic layer 4c Charge applying layer 4d Sponge elastic layer 5 having a skin layer as a charge applying layer Elastic roller 6 Toner 14 Development device

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-7-64343 (JP, A) JP-A-6-308801 (JP, A) JP-A-1-309083 (JP, A) JP-A-5- 6082 (JP, A) JP-A-3-21968 (JP, A) JP-A-5-303269 (JP, A) JP-A-6-167914 (JP, A) Actual development Sho 64-19966 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) G03G 15/08 504 B29D 31/00 B29K 77:00

Claims (6)

(57) [Claims] 1. A developer amount controlling elastic blade having a charge imparting layer having a polyamide elastomer on its surface.
The polyamide elastomer has a terminal amino group
Xylated carboxylated polyamides and polyethers
An elastic blade for controlling a developer amount, which is a block copolymer of 2. A developer amount regulating elastic blade according to claim 1, wherein the polyamide component content percentage in the polyamide elastomer structure is 20% or more and 80% or less. 3. The elastic blade for controlling a developer amount according to claim 2 , wherein the polyamide elastomer is a block copolymer in which polyamide and polyether are ester-bonded to each other. 4. The elastic blade for controlling a developer amount according to claim 2 , wherein the polyamide elastomer is a block copolymer in which polyamide and polyether are amide-bonded. 5. A developer accommodating container for accommodating a one-component developer, a developer carrying member carrying and carrying the developer from the container to a developing section, and an amount of the developer applied on the surface of the developer carrying member. In a developing device having a developer amount regulating member for regulating, the developer amount regulating member is an elastic blade having a charge imparting layer having a polyamide elastomer on its surface.
The polyamide elastomer has a terminal amino group
Voxylated carboxylated polyamide and polyethene
A developing device, which is a block copolymer with a polymer . 6. A process cartridge in which at least an electrophotographic photosensitive member and a developing device are integrally formed into a cartridge and which can be attached to and detached from an image forming apparatus main body, wherein the developing device contains a one-component developer. A container, a developer carrying member for carrying and carrying the developer from the container to the developing section, and a developer amount regulating member for regulating the amount of the developer applied on the surface of the developer carrying member. Oh an elastic blade having a charge imparting layer regulating member has a polyamide elastomer surface, polyamide elastography
Is a carboxy with a terminal amino group carboxylated.
Block copolymers of Le of polyamide bromide and polyether
A process cartridge, characterized in that it.