JP2002268487A - Electrophotographic elastic blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elastic blade which is strong against chipping and has a satisfactory cleaning capacity. SOLUTION: An electrophotographic elastic blade 8 has a blade member 4 and a support member 5 stuck into one body by an adhesive 6 and is brought into contact with an opposite material and is used for cleaning, and the blade member is made of an elastic body of which the 100% modulus is within a range of 1.5 to 10 MPa, and an angle 7 formed by two planes (a face 1 and b face 2) forming an edge 3 abutting on the opposite material is an obtuse angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic blade used in an electrophotographic apparatus utilizing an electrostatic transfer process, such as an electrostatic copying machine and a printer.

[0002]

2. Description of the Related Art In a known electrophotographic apparatus in which a process (image process) of transferring a toner image electrostatically formed on the surface of an image carrier onto paper or the like is repeated, an electrophotographic apparatus is used to achieve the process. Various components are used in addition to an image carrier in the form of a roller or a belt.

[0003] In recent years, there has been a growing need in the market for high durability and high speed of the apparatus and high precision of images, and various studies have been made on electrophotographic apparatuses in order to respond to those needs. ing. In particular, one of the factors that hinder high durability and high accuracy of images is that residuals such as paper dust and toner gradually accumulate on the surface of component parts, causing long-term image unevenness and streak defects. There is a problem that the process does not work properly. For this reason, many methods for removing residues on the surface of component parts have been put to practical use. Among them, the device configuration is simple, space saving,
Further, a blade system having excellent cleaning properties is widely used. The blade-type cleaning is performed as shown in FIG.
The ridge line (edge 3) composed of the surface 1 and the B surface 2 is brought into contact with the component 9 which is a mating material, and then the elastic blade 8 or the component 9 is moved to scrape off the residue on the surface of the component. This can be achieved by taking As the material of the blade member 4, which is required to be excellent in durability and cleaning property, various materials having high elasticity such as urethane rubber are used.

[0004]

However, cleaning the elastic blade has the following problems.

A first problem is that the elastic blade is chipped near the edge of the elastic blade when used for a long period of time, and the toner passes through the elastic blade. Therefore, in order to prevent the occurrence of chipping, for example, there is a method in which the hardness of the elastic body or the stress (modulus) at the time of low elongation of the elastic body is increased to suppress the elongation of the edge of the elastic body to prevent chipping. Conceivable. However, in this method, if the hardness or the modulus at the time of low elongation becomes too high, there is a problem that the elasticity of the blade member generally decreases, especially in a low temperature environment such as in winter, so that the cleaning property decreases. In addition, for example, in JP-A-11-073075, a surface of an elastic blade is coated with a low friction material,
Attempts to prevent chipping have been proposed. However, low-friction materials are generally expensive and lead to increased costs, such as complicating the molding process.
The range of use is limited.

A second problem is that toners and the like are becoming finer in recent years as the accuracy of images is increased, and cleaning with a conventional elastic blade is no longer sufficient. In particular, with an elastic blade that cleans the image carrier, if the cleaning property is insufficient, the image tends to appear as streaks or stains, which is a very serious problem especially in a color copying machine or printer. I have. In general, in order to improve the cleaning property, a method of increasing the contact area with a component as a mating member by reducing the hardness or modulus of rubber is known. However, this method has a first problem. Being in conflict with the point solution.

At present, an elastic blade for the purpose of cleaning controls the material properties in an intermediate region where both problems 1 and 2 can be solved. Since the miniaturization of the toner is advancing rapidly, the area is extremely narrowed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional disadvantages, and has as its object to provide an elastic blade which is resistant to chipping and has good cleaning properties.

[0009]

According to the present invention, there is provided an electrophotographic elastic blade in which a blade member and a supporting member are integrally fixed by an adhesive, and are used in contact with a counterpart material for cleaning. An elastic blade for electrophotography, comprising an elastic body having a 100% modulus in the range of 1.5 to 10 MPa, and wherein an angle between two planes forming an edge which comes into contact with a mating member is obtuse.

In this case, it is preferable that the angle between the two planes forming the edge is not less than 95 ° and less than 130 °.

The blade of the present invention is preferably used for cleaning an image carrier for an electrophotographic apparatus.

Referring to FIG. 1, the angle (edge angle 7) formed by two planes forming the edge of an electrophotographic elastic blade (hereinafter simply referred to as an elastic blade) usually used for cleaning is simple to form. Therefore, it is formed at 90 °, including the variation in production, 90 ± 1-2
° formed. However, the present inventors have conducted a series of studies to obtain an elastic blade that is resistant to chipping and has good cleaning properties. It has been found that controlling the edge angle 7 simultaneously is an important factor. Therefore, as a result of further detailed examination of the 100% modulus and the edge angle 7 as the modulus when the blade member is at low elongation, it has been found that the desired object can be achieved by the configuration of the present invention.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail.

The elastic blade 8 of the present invention comprises, for example, as shown in FIG. 1, a support member 5, a blade member 4, and an adhesive 6 for bonding them.

The support member 5 is not particularly limited, and may be, for example, a member made of a rigid metal, an elastic metal, a plastic, a ceramic, or the like. A steel plate manufactured from a steel plate or the like subjected to a surface treatment such as a chromate treatment can be used. In the production of the elastic blade, it is preferable to use the support member after performing a degreasing treatment with a solvent or the like.

The blade member 4 is not particularly limited as long as it is an elastic body.
Examples thereof include DM, silicone rubber, thermosetting urethane elastomer, and thermoplastic urethane elastomer. From the viewpoint of abrasion resistance, thermosetting urethane elastomer is preferable. As a method for producing the urethane elastomer, a prepolymer method, a one-shot method, and a semi-one-shot method which is intermediate therebetween are used. Such a urethane elastomer is produced by a thermosetting reaction of a polyisocyanate compound, a high molecular weight polyol, a low molecular weight dihydric alcohol or a trihydric or higher polyhydric alcohol as a curing agent.

Examples of the polyisocyanate compound include 4,4'-diphenylmethane diisocyanate (MDI), tolylene diisocyanate (TDI),
4,4′-dicyclohexylmethane diisocyanate (water-added MDI), carbodiimide-modified MDI, 2,4
-Tolylene diisocyanate uretidinedione (2,4
-TDI dimer), xylene diisocyanate (XD
I), trimethylhexamethylene diisocyanate (T
MHDI), ortho toluidine diisocyanate (TO
DI), naphthylene diisocyanate (NDI), paraphenylene diisocyanate (PDI), lysine diisocyanate methyl ester (LDI) and the like. These may be used alone or in combination of two or more.

Examples of the high molecular weight polyol include polyester polyols such as polyethylene adipate, polybutylene adipate, polyhexylene adipate, copolymers of ethylene adipate and butylene adipate, polycaprolactone, polyoxytetramethylene glycol, polyoxypropylene And polyether polyols such as glycol. Among them, the molecular weight is 15
It is preferable to use those having a size of about 00 to 3000. That is, if it is less than 1500, the properties of the obtained urethane rubber tend to decrease, and if it is 3000 or more, the viscosity of the prepolymer increases, and the workability of elastic blade molding tends to deteriorate significantly. .

As the curing agent, it is preferable to use a low molecular weight dihydric alcohol having a molecular weight of 300 or less, a polyhydric alcohol having a trivalent or more molecular weight, or the like. Examples of the low molecular weight dihydric alcohol include ethylene glycol (EG), diethylene glycol (DEG), propylene glycol (P
G), dipropylene glycol (DPG), 1,4-butanediol (1,4-BD), hexanediol,
1,4-hexanediol (HD) and the like.

The trihydric or higher polyhydric alcohol includes
For example, glycerin, 1,2,4-butanetriol, trimethylolethane, trimethylolpropane (TM
P), trifunctional aliphatic polyols such as 1,2,6-hexanetriol, polyethertriol obtained by adding ethylene oxide, propylene oxide, butylene oxide, etc. to the trifunctional aliphatic polyol, lactone, etc. to the trifunctional aliphatic polyol These curing agents are used alone or as a mixture of two or more.

The elastic blade is molded by a commonly used method. For example, a thermosetting polyurethane elastomer sheet obtained by centrifugal molding or the like is cut into a predetermined size to obtain a blade member. A method of applying an adhesive to be used, bonding a blade member thereon, and applying heat and pressure to bond the adhesive, holding the support member coated with the adhesive in a blade member forming mold, and applying a polyurethane forming liquid around the bonded portion. A casting method of injecting and bonding simultaneously with the curing reaction can be adopted. In this case, the adhesive used for the heat and pressure bonding is not particularly limited, and examples thereof include a hot melt adhesive. The adhesive used for the simultaneous curing and bonding is not particularly limited, and examples thereof include a urethane-based solution adhesive.

A method for setting the edge angle 7 of the elastic blade to an appropriate angle is, for example, the shape of a casting mold, or after manufacturing by the above-described manufacturing method, cutting the blade member to a predetermined angle to adjust the angle and dimensions. The present invention is not limited to any method.

The elastic blade 8 molded as described above
As shown in FIG. 2, the edge 3 is brought into contact with a component 9 (for example, an image carrier) at an appropriate set angle 10 so that pressure is concentrated on the edge 3 to perform cleaning. Here, in order to maintain good cleaning performance and to prevent chipping of the edge 3 during cleaning, the 100% modulus of the blade member 4 is set to 1.5 to 10 MPa, and at the same time, the edge angle 7 is set to an obtuse angle. That is, if the 100% modulus is too small, chipping of the edge 3 is likely to occur during cleaning, while if too large, the cleaning property in a low-temperature environment deteriorates. Preferably, the 100% modulus is 2.5-8M
Pa.

The obtuse angle here means that the edge angle 7 is larger than 90 ° and does not include 90 °. And it is preferably 95 ° or more. Also, usually 170 °
Or less, preferably less than 130 °. That is, when the angle is too obtuse, the effect of the edge becomes unclear and the cleaning performance is reduced, and when the angle is close to 90 °, the effect of the obtuse angle is diluted. Further, the edge angle 7 is determined by other factors set when the blade is incorporated into the device, the vertical contact pressure N0 of the blade (see FIG. 3),
The optimum value is appropriately determined by setting the setting angle 10 of the blade to the component 9, the rubber hardness of the blade member 4, the shape of the blade, the diameter and type of the component 9, and the like. For example, when the component 9 is an image carrier, the setting angle 1
Since 0 generally takes a value of about 10 to 40 °, the a-plane 1
Does not contact the image carrier, that is, the edge angle 7
Is an angle between 170 ° and 140 ° to 90 ° (excluding 90 °).

Although the reason why the cleaning property is improved by the structure of the present invention is not always clear at present, the following reasons are presumed. In the following description, an image carrier is taken as an example of the component 9 and cleaning while the image carrier is rotating will be described. However, the present invention is not limited to this.

First, the reason for making the 100% modulus physical property range of the blade member appropriate will be described. 4 to 6
Is a schematic view showing the direction of the force applied to the tip of the blade member, showing the state at the time of stopping, rotating, and at the time of criticality, respectively. (B) is an enlarged view of (a), and (c) is It is the figure expanded further.

When considering cleaning with an elastic blade, important factors are the vertical pressure Nx of the rotating blade and the blade-image carrier contact area S at that time.
x (FIG. 5). However, when the image carrier is rotating, since the blade member 4 is an elastic body, the pressure Nx and the contact area Sx in the vertical direction constantly fluctuate. Therefore,
In order to explain the vertical pressure Nx and the contact area Sx when the image carrier is rotating, a contact point Px between the blade 8 and the image carrier when the image carrier is rotating is assumed and its movement is considered. It is necessary (FIG. 5A). Note that the letter x is at position P
1, a symbol added to indicate the state between P3.
4 to 6 show the movement of the tip of the elastic blade 8 before and after the image carrier starts to rotate, respectively. When the rotation is started from the time when the image carrier is stopped, the elastic blade 8 exhibits the following behavior. First, when the image carrier starts to rotate, a force D in the drum shearing direction is applied at the contact point P1, so that the edge contact portion Px gradually moves in the direction P3 while deforming in the rotating direction (FIGS. 4 and 5). .

Here, when the contact position of the elastic blade 8 during the rotation of the image carrier is represented by Px, the pressure Nx in the vertical direction of the elastic blade, the stress (shear stress) Fx in the horizontal direction, and the frictional force Mx against the shear stress. , The contact area Sx between the image carrier and the blade is expressed as follows. Formula I Nx = N0 + Nh (N0: vertical elastic blade contact load at stop, Nh: vertical load due to blade member deformation (generated at the time of image carrier rotation)) Formula II Fx = Fax + Fbx-Mx (Fax: Tensile stress on surface a at Px, Fbx: compressive stress on surface b at Px) Formula III Mx = μNx (μ: friction coefficient: frictional force is not shown in FIG. 5 (b)) Formula IV Sx = Ax + Bx (Ax: contact area of a surface with drum at the time of Px, Bx: P
The contact area of the surface b with the drum at the time of x: FIG. 5 (c)) Formula V Sx = Nx / E (E: Yield stress of the material constituting the blade member 4) (Formula III is Newton's formula, Formula V is That is, when the edge contact portion Px moves in the P3 direction, the elastic blade is deformed and Nh, Fax, and Fbx are increased, so that the vertical load Nx and the horizontal stress (shear stress) are increased. Fx and frictional force Mx increase (Equations I to II)
I). Here, the moment when the movement of the contact portion Px stops between P1 and P3, that is, when the shear stress Fx becomes equal to the shear direction D generated by the rotation of the image carrier (F
x = D) is set to P2. While the force D in the shear direction is constant, the elastic blade 8 is constantly vibrating or deforming, so that Fx always fluctuates. Therefore, the position P2 is not always a fixed position. When D <F, the edge contact portion Px moves to the P1 side, and when D> F, the edge contact portion Px moves.
x moves to the P3 side (FIGS. 5A and 5B). In general, when the edge 3 is observed during the rotation of the image carrier, a complicated wave-like movement can be observed. However, the above-mentioned P2 is not constant, and the movement of the P1 side and the movement of the P3 side are repeated. It is considered that it has occurred, and it extends over the entire motion edge.

The relationship between the movement of the contact point Px and the cleaning property is summarized as follows. That is, the contact portion Px
Moves to the P3 side, since the contact area Sx is proportional to the load Nx in the vertical direction, the contact area Sx increases (Equation V). Conversely, when Px moves to the P1 side, the contact area Sx and the load Nx in the vertical direction decrease simultaneously. In order to improve the cleaning performance by the elastic blade 8, it is sufficient to make it difficult for the toner to enter between the blade and the image carrier. Therefore, the pressure Nx in the vertical direction of the rotating blade and the contact area Sx of the blade-image carrier at that time. It can be presumed that the cleaning performance is improved by increasing. Therefore Px
Moves to the P3 side, the cleaning property is improved (Nx,
On the contrary, when Px moves to the P1 side, it can be said that the cleaning property decreases.

However, if Px moves too far to the P3 side, another adverse effect also occurs. That is, the problem of chipping or turning over occurs as follows.

The contact area S can be divided into a contact area A of the surface a with the image carrier and a contact area B of the surface b (formula VI, FIG. 4).
(C), FIG. 5 (c), FIG. 6 (c)). Contact area A of surface a
x is A1 = 0 at P1, and the tip of the blade is inclined as it moves to the P3 side.
Increases. Conversely, the contact area Bx of the b-side is the largest at P1 because the elastic body is compressed, and approaches 0 as it moves to the P3 side. Here, if the edge contact portion returns to the P1 side due to the shear stress Fx before the b-plane contact area Bx becomes 0, the cleaning by the elastic blade 8 is continued, but the point at which the b-plane contact area Bx becomes 0 ( Critical point: P3
Suppose: FIG. 6), the repulsive stress Fa of the elastic blade
3 + Fb3 almost since according to the direction perpendicular to all image bearing member (Fa3 + Fb3 = Nh), the friction M ₃ are rapidly increases (Formula I, II, V). As a result, it becomes difficult to move the contact point Px to the P1 side due to the shear stress F of the blade.

Since the contact portion Px of the blade is not always uniform in the longitudinal direction, the critical point P3
If the area over the area is small, the elastic body breaks only at that portion (breakage). If the area beyond the critical point P3 is large in the longitudinal direction of the blade, the tip is turned over a wide area around that part. In this case, since the stress Nx in the vertical direction is simultaneously generated in a wide range in the longitudinal direction, Mx suddenly increases and eventually causes a serious problem that the drum cannot be rotated.

In summary, in order to improve the cleaning performance by the elastic blade, the pressure Nx in the vertical direction of the blade during rotation and the contact area S of the blade-image carrier are improved.
x is made as large as possible while maintaining a stable state. In other words, in the range where the contact area Bx of the surface b is not set to 0, P
It is necessary to control the movement of the edge so that the two states can be stably maintained. The edge movement between P1 and P3 can be controlled to some extent by the vertical blade contact pressure N0 when stopped. However, according to this method, when the contact pressure N0 is too small, Nx is small and the edge tip moves further to the P3 side, and finally, turning over and chipping easily occur. Further, when the contact pressure N0 is smaller, a gap is formed and toner slippage occurs. If the contact pressure N0 is too large, the edge does not properly contact the image carrier (see FIG. 3), so that the edge contact portion Px can hardly move from the P1 side to the P3 side. However, the pressure Nh in the vertical direction due to the deformation of the elastic body is insufficient, and the contact pressure tends to be insufficient, and in some cases, toner slips through. Furthermore, considering the dimensional variation of the blade, the movement of Px over the entire edge is represented by P2
It is not always sufficient to control so as to be stable in the vicinity only by the contact pressure N0. Therefore, in the present invention, attention is paid to the fact that the movement of the contact point Px at the edge tip is caused by a slight elongation of the blade member 4 at the contact portion, and the stress at the time of low elongation of the blade member 4 and the 100% modulus are appropriately adjusted. This is set so that the movement of the edge is controlled to improve the cleaning property.

Secondly, the reason why the edge angle 7 in the present invention is made obtuse is described with reference to FIG.
A description will be given in comparison with the case of 0 °. Here, for example, an example is given in which the edge angle is 100 °, but, of course, the obtuse edge is not limited to this.

When the edge angle 7 is 100 °, the a-plane is closer to the contacting image carrier, so that the P2 state is established with a relatively small amount of movement as compared with the case of 90 ° (in this case, in the vertical direction). The load is estimated as N (100 °) ≧ N (90 °)). Therefore, the shear stress F at which the edge contact portion goes from P2 to P1 is F (90 °)> F (100 °) (Formula II; Fa (90 °)> Fa (100 °), Fb (90 °)).
> Fb (100 °) and P2 when the edge angle is 100 °
Therefore, it can be said that the movement of P1 is small and the state of P2 is easily maintained. The contact area S2 between the drum and the blade in the P2 state
Satisfies S2 (90 °) <S2 (100 °) (A2 (90 °) <A2 (100 °) because the distance between the a-plane and the image carrier is short, B
2 (90 °) <B2 (100 °)).

As described above, by making the edge angle 7 obtuse,
The vertical load N and the contact area S can be increased more stably, and at the same time, the force F returning to the P1 side of the edge can be reduced. Further, when the edge angle 7 becomes obtuse, the edge becomes relatively thick, so that the force until the elastic body breaks becomes relatively large, and the effect of preventing chipping during use of the edge 3 can be obtained. . Since these all lead to the improvement of the cleaning property, making the edge angle 7 obtuse in the present invention means that the cleaning property is improved.

From the above, it is considered that by controlling the 100% modulus within a certain range and at the same time making the edge angle obtuse, the movement of the edge tip can be controlled and the cleaning property is improved.

[0038]

EXAMPLES The present invention will be described below with reference to examples.
The present invention is not limited to only these examples.

Example 1 After casting a urethane elastomer, the edge tip was cut at 120 ° to obtain an elastic blade. The 100% modulus of this urethane is 3.5 MPa.

Example 2 After casting a urethane elastomer, the edge tip was cut at 100 ° to obtain an elastic blade. The 100% modulus of this urethane is 3.5 MPa.

Example 3 After casting a urethane elastomer, the edge tip was cut at 120 ° to obtain an elastic blade. The 100% modulus of this urethane is 2 MPa.

Example 4 After casting a urethane elastomer, the edge tip was cut at 120 ° to obtain an elastic blade. The 100% modulus of this urethane is 8 MPa.

Comparative Example 1 After casting a urethane elastomer, the edge tip was cut at 90 ° to obtain an elastic blade. The 100% modulus of this urethane is 3.5 MPa.

<Comparative Example 2> After casting the urethane elastomer, the edge tip was cut at 80 ° to obtain an elastic blade. The 100% modulus of this urethane is 3.5 MPa.

Comparative Example 3 After casting a urethane elastomer, the edge tip was cut at 65 ° to obtain an elastic blade. The 100% modulus of this urethane is 3.5 MPa.

<Comparative Example 4> After casting a urethane elastomer, the edge tip was cut at 120 ° to obtain an elastic blade. The 100% modulus of this urethane is 15 MPa.

Comparative Example 5 After casting a urethane elastomer, the edge tip was cut at 120 ° to obtain an elastic blade. The 100% modulus of this urethane is 1 MPa.

<Evaluation Method> With respect to the blades of the example and the comparative example, a vertical load N (contact pressure) and a shear stress F during rotation were applied to the blades by the evaluation device shown in FIG. The measurement was performed for 10 minutes. Measurement of N and F is 1
The measurement was performed every second, and the average value of the measured values and the standard deviation were obtained. The vertical load N0 at the time of stopping was set to 7.0 N in order to make the conditions of each blade the same.

Cleaning Property Printing was performed on 20,000 sheets (A4) by an electrophotographic printer. The image states of the 20,000th sheet were compared.

Edge chipping After printing 20,000 sheets (A4) by an electrophotographic printer, blade edge chipping (10 μm or more)
Confirmed the number of.

The evaluation results are shown in Table 1.

[0052]

[Table 1] As shown in Table 1, the standard deviations of Examples 1, 2, 3, and 4 are smaller than those of Comparative Examples in spite of the large N. This indicates that the example can stably increase the vertical load N as compared with the comparative example. Further, F and standard deviation of Examples 1, 2, 3, and 4 are smaller than those of Comparative Examples. This indicates that, in the example, the stress F in the shear direction is low and the movement of the contact portion P of the edge is relatively small as compared with the comparative example.
Further, the example has better cleaning properties than the comparative example, and has less edge chipping.

The effect of properly defining the 100% modulus and the edge angle is to improve the cleaning property and prevent chipping of the edge. The reasons are summarized below. (1) Focusing on the fact that the movement of the contact point Px at the tip of the edge is derived from slight elongation of the contact portion, the blade member 4
The movement of the edge is controlled by making the 100% modulus appropriate for (2) When the edge angle 7 is an obtuse angle, Px enters the P2 state with a relatively small amount of movement, so that the P2 state is easily maintained (shear stress F is relatively small). (3) When the edge angle 7 is obtuse, the contact area S can be increased because the distance between the blade a surface and the image carrier is short. (4) When the edge angle 7 is an obtuse angle, the b-plane contact area B = 0.
Before reaching the (critical point P3), the surface a easily contacts the image carrier, and the edge becomes thicker, so that the force until the elastic body breaks becomes relatively large, preventing chipping. I do.

[0054]

According to the present invention, it is resistant to chipping and turning,
An elastic blade having good cleaning properties can be provided. Therefore, the elastic blade of the present invention can be suitably used for cleaning components such as a printer and a copying machine which are employed in an electrophotographic system.

[Brief description of the drawings]

FIG. 1 is a schematic view of an elastic blade.

FIG. 2 is a schematic view of a state when an elastic blade is used.

FIG. 3 is a schematic diagram showing a comparison of vertical contact forces and a state of a blade tip at that time.

FIG. 4 is a schematic diagram showing the direction of a force applied to the blade member tip when the image carrier is stopped, the contact area between the blade member tip and the image carrier, and the like.

FIG. 5 is a schematic diagram showing the direction of a force applied to the blade member tip when the image carrier rotates, the contact area between the blade member tip and the image carrier, and the like.

FIG. 6 is a schematic diagram showing the direction of a force applied to the blade member tip when the image carrier is critical, the contact area between the blade member tip and the image carrier, and the like.

FIG. 7 is a comparison diagram when the edge angles are 90 ° and 100 °.

FIG. 8 is a principle diagram illustrating a configuration of an evaluation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 a surface 2 b surface 3 edge 4 blade member 5 support member 6 adhesive 7 edge angle 8 elastic blade

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H134 GA01 GA09 GA10 GB02 GB05 HD01 HD04 HD05 HD06 HD11 HD19 HD20 KD06 KD07 KD08 KE02 KE07 KH01 KH04 KH15

Claims (3)

[Claims] 1. An electrophotographic elastic blade in which a blade member and a support member are integrally fixed by an adhesive and abut against a mating member and used for cleaning, wherein the blade member has a 100% modulus of 1.5. ~ 1
An elastic blade for electrophotography, comprising an elastic body having a range of 0 MPa, and an angle formed by two planes forming an edge abutting on a counterpart material is obtuse. 2. The blade according to claim 1, wherein an angle between the two planes forming the edge is not less than 95 ° and less than 130 °. 3. The blade according to claim 1, wherein the blade is used for cleaning an image carrier for an electrophotographic apparatus.