JPS5946664A - Transfer roll for use in copying machine - Google Patents

Abstract

PURPOSE:To enhance transfer efficiency and to form a uniform and good quality image, by constituting the titled roll out of a semiconductive outer layer having low hardness and superior ability of deformation recovery, and prevented from toner attachment and melt attachment, and an inner layer made of conductive rubber. CONSTITUTION:The inner layer 11b of a conductive rubber contg. a conductive carbon is stuck to a metallic core 10, and the outer layer 11a of a very soft semiconductive rubber contg. no conductive carbon is stuck to the inner layer 11b to obtain a rubber roll. Since it has a double wall structure of rubber for pressing a transfer material to the contact face of a photosensitive cylindrical plate with a uniform pressure, it is low in hardness, high in deformation ratio, and excellent deformation recovery ability. The rubber used for the outer layer 11a is prepared by adding >=10pts.wt. low mol.wt. liquid rubber to blended rubbers to lower hardness and raise elastic deformation ratio. A conductive carbon is incorporated in styrene-butadiene rubber to lower resistivity and used for the inner layer 11b.

Description

[Detailed Description of the Invention] Akira Kimoto describes how a toner image formed by a photoreceptor drum - [-] in a photoreceptor drum (J, 9) [U toner image with this]! The purpose of this invention is to improve the transfer roller used when rolling a 4j bed onto a transfer material that has been subjected to a 1:j7'W.

]・1, Rubbery; Good・1 as reinforcement and filling >7
. However, lead 111. The 1' IH property of the carbon Σ--n is A, but if it is blended with J-1 sufficient to provide the JI; anti-J'+ required for the transfer roller, the The rubber hardness after the sword rises, so it is low (
1 (, 14 degrees cannot be obtained. Also, "!) embrittlement, table, required letter resistance 1A, value - Il] Nio-sama 2
) product'jQ-all combinations, iJf.

It is not possible to secure it due to variations in pure culm.

In addition, polymer button σ-nitrile butadiene rubber and/or
There is also a collection of rubber rollers made by adding liquid rubber to a blended rubber of nitrile butadiene rubber and other rubbers (1F).

In this case, it is possible to secure 1L of products whose Jll resistance value falls within the range of 1 to 5 × I Q'Ω, but 1 ×
Resistance value below 108Ω, e.g. I x 107~9X
A narrow value such as 107Ω→J (cannot be set to resistance value r1j).

The object of the present invention is to solve the above-mentioned drawbacks of the conventional rubber roller, and to provide a semi-conductor roller with deformation recovery of 1 degree and 1 degree of deformation and no adhesion or fusion of smeared toner. Outside the rubber 1:'
+2 and G's fti with the inner layer of rubber
? ＋ [, / Gomurosi to i1 Excellent photographic efficiency,
Jh as a transfer roller that can provide uniform and high quality images
1 offering.

That is, in the present invention, a toner image formed on a jig light body is transferred to a transfer material which is closely removed from the toner image. (JS, lll1.l crawler has an inner layer made of rubber containing conductive carbon and carbon, and a liquid rubber with low molecular weight as a rubber base material without containing conductive carbon, plasticizer, or softener. A rubber roller consisting of a layer of 1-glue rubber blended with 1-glue, and a layer of 1-1 rubber that prevents fusion and adhesion.
It is located at lj, '+ 7F roller for river.

The invention will now be explained in detail with reference to the drawings.

Drill the main groove z1; at the 11th χ1 f, j+i';'-
P! A '4', 'Ii<i odor'T:, photosensitive circle & (photosensitive drum) 2' It is formed into two: Load 1 βy
Five visible images (hereinafter referred to as toner images) by I particles (hereinafter referred to as toner images) 7
(Hereinafter referred to as Toner I 3I) Transfer port 1 is used when transferring the transfer material 9 which has been closely aligned with this. This eaves roller 1 is in close contact with the photosensitive disc 2, and the N rotation 1. , ? -! Ill like it? During transfer, apply the transfer material 9 to the tip disk 2 of the n rod between the photosensitive disk 2 and the transfer roller 1, and transfer the image of the photosensitive circle & 2 J:. Therefore, when transferring the toner image on the sleeve of the opening, the toner image ψ is formed on the photosensitive disc 2 and 'l.
! In order to apply an electric charge between the transfer roller 1 and the transfer roller 1, an electrically conductive roller 1 is used. For this reason,
Special 7iL i/l:, lj to 'daroshi 1 is 106~1
It is required to have an electric resistance of 0.07Ω, excellent transfer efficiency, and to provide a uniform, high-quality image.

Moreover, the transferred image 9 is not evenly pressed against the photosensitive disc 2 with a uniform pressure, so to speak, but if the pressure and the degree of closeness differ depending on the field 111, the transferred image i ρ + i4
Q> unevenness occurs, resulting in extremely unsightly duplication Y i+ii
Hundred shi! and tc.

In the figure, 3 is a magnetic brush, 4 is a feeder, roll, 5 is a cleaning brush, 6 is a heater, 8 is a corona (II electric (+
%1% is shown respectively.

The transfer port sheet 1 according to the present invention eliminates the above-mentioned drawbacks.As shown in 2nd iNa and b, 1. The inner layer 11b of rubber is adhered to the inner layer 11b, and on the inner layer Ra 11b is a very soft conductive layer 11b containing a semiconducting carbon.
This is a rubber roller formed by adhering an outer layer 11& of Ifi rubber.

In particular, the transfer opening sheet 1 according to the present invention is as shown in the figure.
71 From the structure of the rubber plate 2, press it against the contact surface of the light disc 2 with a pressure such as
Therefore, the hardness is low, the deformation is large, and the deformation recovery is high! 'II is better.

Low hardness and elastic deformation 1. ) is large soft I′! To make rubber, it is essential to combine pIJ agent, soft f and 11'; Condition: When moving to the rubber surface, bleed the ring F+7. (1. I have rent.

Also, 4! I, 'lj Ni Roller Seaner and Wooden Blade] (Although this is not the case, toner spilled from the surrounding area and mixed in is often deposited on the transfer roller.The thermoplastic resin contained in this toner Then, the toner particles transferred to the rubber surface due to the bleeding phenomenon dissolve and fuse the toner to the roller surface. Therefore, the required elasticity, II.J4, 11 and Sakaki'Ju i), which has pot shape recovery property and no toner fusion
Reinforcement and co-electrical carbon that gives l-? It has not been conventionally practiced to mix it into rubber as a ρ-nineum agent.
However, 3j+"Ii?, 1'1゛carbon to 11
Required for the waste roller (Jl, 11 enough to warm up the resistance 141 [when l is inserted, D';,) 1 < his rubber! The degree of elastic deformation increases significantly, and the elastic deformation l, 1 cannot be reduced to 40 degrees or less.

Also, Bt? The resistance J3'+' when converted to r has a large variation in value and cannot be reduced to a resistance value rlj of 5 x 10° to 9 x 106 Ω. This rubber overcomes the drawbacks of 1)-sea. That is,
Polymer J, 1-2) The blended rubber of IJ rubbutadiene rubber and/or nitrile butadiene rubber and other rubber materials O.1 has a resistance value close to 108Ω, so it is safe to mix conductive carbon. do not have. However, the JIS degree is 45 to 50 degrees even if no reinforcing carbon or conductive carbon is contained, making it unsuitable as a 41 conductive rubber roller used in a copying machine 1t.

Therefore, in the present invention, it is necessary to add 10% to the blend rubber.
Revised, li (add low molecular weight liquid rubber on the parts and add 1 degree): (L,, +5'+'i ti 笈) 1
Increase the tlit and place it outside the rubber roller)
Used for 11a. As a liquid com, liquid blend rubber of molecular 1i, liquid styrene-butadiene rubber, liquid 2I
・Lil rubber and liquid lIT 1. At least one selected from the group consisting of Blend rubber is used.

For this outer layer 11a, add high-density (1) rE 2) IJ rubutadiene rubber or outer layer 1, high-quality troblene rubber, styrene butadiene rubber: i, , +
11+7s.]: Carbon is blended to give a low resistance value and is used for the inner layer 1 lb of the rubber roller.

Briefly, the present invention will be described in detail by way of example.

Practical Example 1 The inner and outer layers of a rubber roller for transfer were prepared according to the following formulation.

Evening I no~ rubber'
(','!(,hl
i'+l,) nitrile butadiene rubber
10 [)h+i lead flower
5 Sudarin r1ri
1 Carbon Black 10 Calcium Carbonate 30iI 1 Yellow
2 Tetramethyldiuram・
Disulfide 1 Juice-like butadiene rubber R-45 (output) (manufactured by 6 Petroleum)] f 1. 24J e'
IJS nitrile butadiene com 20 R/1
Rubber: (nitrile butadiene rubber with amount t■ for 100-f'+
! /hundred

5 stearin limited 1shij75
'Li carphone black 15h'
Calcium 12ate 10sulfur
2 Toramedilthiuram disulfide 1. First, add the inner layer rubber on the core bar at 150°C for 15 minutes.
I made a small rubber roller 41; and then I made a 4L roller. (III-) The transferred transfer comb side 1-ler is 40 degrees JIS 11 degrees, and the electrical insulation between the core bar and rubber is measured > iu L-
The air resistance values shown in Table 1 below were calculated.

Table 1 The first 77' rubber roller for transfer was used, and the machine was actually used.
5. At the same time, the 4"r image was removed, and on the roller there was a (1'S'j, ζ-
The dojo was completely disgusting.

Indeed, Example 2 In this example, the rubber base material of the outer layer rubber is a mixture of 2 l-zylbutadiene-1 rubber and ethylene propylene synthetic rubber, for example, 11 pieces D (1 rubber). Reiru,
Selected NE-711 was used. Outer knee rubber: Rubber and inner knee rubber were prepared according to the following formulations.

R□icom: (-1
J< fr eyes 1s) Ny-711110 Stearin j"ire monovalent,
Yellow 2-detramethylthiuram disulfide l゛0.5 carbon bundle
2 Charcoal^, Calcium
40i (E-shaped butadiene rubber R-45 (Idemitsu Oil Co., Ltd., 1) J.Gagum in 10 = (J1\tail) Butadiene rubber 1001 [(Lead j'
, l, i 5 stearic acid 1 (pl, received
2DM (didenzothiazyl disulfide) 1.5゛PT (tetramethylthiuram disulfide)
10 Liquid butadiene rubber R-4
510-J,・1・111Example 1 and F)2, 150℃×15 minutes (A) .Generated comb roller C'40
°σ) JIS fullj degree 6・Measures the ゛11 stun resistance of the core metal and rubber! '1 shown in Table 2 below.
(I rejected the caries resistance value.

) ゛2 Front opening for this transcription・Muller 4・i゛・1～', 4. j
L Koro implemented in li, Sen 1! What is the image of I-i? 1. Tore, Rosie, 1. 2) Na's investigation into the blood, melted, ``It turned out completely.''

''As described above, according to the present invention, a liquid rubber of 37'' TlI carbon and low molecular weight that does not contain any plasticizers or softeners is converted into IJ rubtadiene. A semi-conducting rubber with low hardness and large elastic deformation obtained by adding it to a blend system of nitrile butadiene com and other rubbers.
Electric car phone 3'7 i ie"l ru jji +lf.

1.1. From the inner layer of the com (1-7 completed L place > J-1
1 (The shame of injecting the resistance value ζ'/y February 1 com roller 1 4 jl 'Ji, by Jll on the machine, there is no toner on the surface of the roller, 'nk nil !
i゛f1! l te'j2ll1i naj::) t3',
1 mountain i 41c! mosquito? '=I Rao) 5ru.

, drawing l/) 1″1... simple lj'l', Ming No. 11'
ζ1 is the transcription of the present invention [J-C4, its λtaP's'...
, J:Fi 11+7i's Shinsei 1-1, 21st-1a showing the configuration of the persimmon space is a part 11 of the transfer roller of the present invention.
2゜111@11 Roller 2...6 Photosensitive disc 3o-φ&j Brush 4--・Paper feed roll 5・＠O cleaning brush 6・O・Heater 7・O・Toner II-...Corona charger 9・-・Rotation 7f removal 10・I・Core metal 11a,・6e Rubber outer layer 1ib e e @ Rubber inside R?

Claims (1)

[Scope of Claims] (1) A converter for use in a photoreceptor used to transfer a toner image formed on a photoreceptor to a transfer roller that is in close contact with the photoreceptor.
In this roller, the transfer roller is made of rubber containing conductive carbon, and a low-molecular-weight liquid is applied to the rubber base material without containing conductive carbon, iIJ' DiJ agent, or electrolytic agent. Toner containing rubber)
Lid? 1 rabbit per month, 4 photographs. 'f2) Low molecular weight Ji,i: liquid rubber C' Claim 8r which is at least one selected from liquid butadiene rubber, liquid styrene butadiene rubber, INK21/IJ rubber and liquid chloroprene rubber.
\1 Copying machine device described in pseudo; 'i transfer roller. (3) A liquid rubber having a low molecular weight of 1 is added to 100 parts of the rubber base material to 10 ri j)i: on the part. Roller.