JP2003002481A - Rubber composition for carrying roller, carrying roller using the same, and manufacturing method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide rubber composition for a roller, and a roller for a paper feeding roller and a carrying roller to which paper powder is difficult to stick and which has satisfactory weatherability. SOLUTION: An elastic layer of the roller is formed of the rubber composition which 10-300 pts.wt., more preferably 30-130 pts.wt., of a predetermined filler in a flake form is added to 100 pts.wt. of rubber such as EPDM and butyl rubber halide. Thereby the carrying roller to which the paper powder is difficult to stick on the roller and which has the satisfactory weatherability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyance roller such as a feed roller or a paper feed roller in an electronic copying machine, a laser beam printer (hereinafter referred to as LBP), an ink jet printer or the like.

[0002]

2. Description of the Related Art Conveying rollers such as feed rollers and paper feeding rollers in electronic copying machines and printers are used for running recording media such as plain paper, OHP paper, postcards and envelopes so that stable conveyance can be obtained. Since a high dynamic friction coefficient is required, natural rubber, SBR, etc. have been conventionally used. However, since natural rubber and SBR have poor weather resistance, they have a drawback that stable transportability cannot be obtained for a long period of time. Therefore, recently, in order to improve weather resistance, an ethylene-propylene copolymer (hereinafter referred to as EPDM) as disclosed in JP-A-6-41324.
A rubber composition containing (as abbreviated) as a main component is being used for a sheet feeding roller and a conveying roller.

[0003]

However, in the case of the sheet feeding roller and the conveying roller made of the conventional EPDM composition,
Since the paper dust is apt to adhere, the coefficient of kinetic friction is remarkably reduced, and there is a drawback that the transportability of the recording medium as a roller deteriorates. The present invention has been made in view of these points, and an object of the present invention is to provide a rubber composition for a roller and a roller, which are resistant to paper dust and have good weather resistance in a paper feeding roller and a conveying roller. .

[0004]

Means for Solving the Problems As a result of intensive studies to achieve the above object, the present inventor has found that 100 parts by weight of rubber such as EPDM or halogenated butyl rubber is provided with 10 to 300 parts by weight of a predetermined flake filler. Part, preferably 30-
The present invention has been completed based on the finding that by forming an elastic layer of a roller with a rubber composition added in an amount of 130 parts by weight, it is possible to provide a transport roller that is resistant to paper dust on the roller and has good weather resistance. The present invention also provides a conveying roller in which an elastic layer is formed at least on the outer periphery of a core metal with the rubber composition for a roller. Furthermore, the present invention also provides a method for producing a transfer roller, which is formed by molding a hose-shaped tube made of the composition for a transfer roller, inserting the tube into a shaft, and polishing the outer circumference.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. The ethylene-propylene copolymer rubber used as the base rubber of the rubber composition for a carrying roller of the present invention is the third ethylene-propylene copolymer having an unsaturated bond.
It means an ethylene-propylene-nonconjugated diene terpolymer (EPDM) into which a nonconjugated diene is introduced as a component,
Examples of the third component include dicyclopentadiene, dicyclooctadiene, 5-methylene-2-norbornene, 5-ethylidene-2-norbornene and 1,4-hexadiene.

Specific grades of this EPDM include Mitsui EPT 0045, 1035, 1045, 10
60, 1070, 1071, 3012P, 3045, 3
042E, 3062E, 3070, 3072E, 309
0E, 8075E, 3091, 3095, 4010, 4
021, 4045, 4070, 4095 (above, trade name of Mitsui Petrochemical Industry Co., Ltd.), Esplen 201,
301, 305, 400, 501A, 502, 505,
505A, 512F, 514F, 522, 524, 53
2,552,553,567,582F, 586,60
0F, 601F, 606, 670F, 671F, 67
3, 5214, 5754, 6506S, 6182F (above, trade name of Sumitomo Chemical Co., Ltd.), JSR EP9
12P, EP01P, EP02P, EP941P, EP
961SP, EP07P, EP57P, EP181S
P, EP11, EP43, EP93, EP24, EP2
7, EP21, EP132, EP22, EP25, EP
33, EP35, EP37C / F, EP65, EP5
1, EP57C / F, EP75F, EP86, EP9
6, EP98, EP103AF, EP106EF, EP
107F, EP801E, EP001DE (above, trade name of Japan Synthetic Rubber Co., Ltd.), Keltan 520, 72
0, 820, 312, 512, 712, 812, 31
4, 514, 714, 378, 578, 778, 450
2,4802,4778,4703,4903,563
1A, 512 x 50, 708 x 15, 509 x 100
(These are the product names of Idemitsu DSM Co., Ltd.), NO
RDEL 1040, 1070, 1145, 1320,
1440, 1470, 1660, 2522, 2722 /
P, 2744 / P, 2760 / P (above, DuPont (D
uPont) (USA) product name), Epsyn
40-A, 70-A, 55, 2308, 2506, 45
06, 4906, 5206, 5508, 5805, 75
06, E801, N557, N597, N997, P5
57, P558, P597, MDE239, MDE24
8 (above, Copolymer Rubber and Chemical Corporation
& Chemical Corporation (USA) product name), POLYSAR 227, 30
6, 345, 585, 487XP, 865, 965, 5
465, 5672X, 5875, 6463 (above, Bayer Corporation (Bayer Corporation
(trade name manufactured by USA) and the like.

In the present invention, these EPDMs may be used alone, or two or more kinds of EPDMs may be appropriately blended for the purpose of adjusting Mooney viscosity, propylene content, oil-extended oil amount, vulcanization rate and the like. It may be used, or may be blended with NBR or the like as required.

Halogenated butyl rubber, which is another important base rubber of the present invention, means a synthetic rubber obtained by reacting halogen (chlorine or bromine) with butyl rubber obtained by copolymerizing isobutylene and isoprene. Of these, as chlorinated butyl rubber, JSR Chloro Buty
l 1066, 1068 (above, trade name of Nippon Butyl Co., Ltd.), Polysar Chloro Butyl
1240, 1255 (above, Bayer Rubber Inc. (Canada)
Product name) etc. are illustrated. Also, as the brominated butyl rubber, JSR Bromo Butyl 224
4, 2255 (above, trade name of Nippon Butyl Co., Ltd.),
Polysar Bromo Butyl X2, 20
30, 2040 (above, Bayer Rubber Ink (B
ayer Rubber Inc. ) (Canadian) trade name) and the like.

In the present invention, these halogenated butyl rubbers may be used alone, but by blending with EPDM, a more stable composition for the conveying roller can be obtained. Further, halogenated butyl rubber may be blended with SBR, NR, NBR, CR and the like, if necessary. The NBR is a copolymer of acrylonitrile and butadiene, and includes a carboxyl group-containing product, a partially crosslinked type, a blended product with vinyl chloride, and the like. Specific grades of NBR include Nipol and D
N003, DN009, 1041, 1041L, 103
1, 1001, DN101, DN101L, DN10
3, DN115, 1042, 1042AL, 1052
J, 1032, DN200, DN201, DN202,
DN202H, DN206, DN207, DN212,
DN215, DN219, DN223, DN225, 1
043, DN300, DN302, DN302H, DN
306, DN315, DN401, DN401L, DN
401LL, DN402, DN406, DN407, 1
072J, DN631, DN1021, DN1021
L, DN224, DN1105, DN1205, DN1
305, DN1203JNS, DN502SCR, DN
508SCR, PB5501NF, PB5501LN,
PB5502NF, VN1000 (above, trade name of Nippon Zeon Co., Ltd.), JSR N215L, N222L,
N222SH, N220S, N220SH, N224S
H, N235S, N230SV, N230SL, N23
0S, N230SH, N232S, N232SH, N2
38H, N231L, N231H, N237, N237
H, N239SV, N236H, N241, N241
H, N240S, N242S, N251H, N250
S, N260S, N520, N530, N640H, N
640, N202S, N201, N210S, N211
SL, PN20HA, PN30A (above, trade name by JSR Corporation) and the like are exemplified.

In the present invention, examples of the flake-like (flaky) filler which is an essential additive include talc, diatomaceous earth, graphite and mica powder. The composition of talc (talc) is magnesium silicate (3MgO · 4SiO ₂ · H ₂ O)
The structure is orthorhombic and has a layered crystal structure in a single crystal system, and since the bond between layers is weak, it is easily peeled off and has a smooth feel. The particles are generally in the form of flakes, having a Mohs hardness of about 1 to 1.5, an aspect ratio of 10 to 20 and a particle size of about 2 to 8 μm. As a concrete grade of this talc, talc JET-
S, JET-A = R series, G series, Y series, SW series (above, product name manufactured by Asada Milling Co., Ltd.), talc GTA, CTA1, CTA2, fine talc (above, product name manufactured by Kunimine Industry Co., Ltd.), No. 1 talc, No. 2 talc, Matsuin Bifun talc, M talc, PS talc, PH talc, P talc, TT talc, T talc (above, product name of Takehara Chemical Co., Ltd.), PP talc, P, R, DR, high filler, etc. (above, trade name of Tsuchiya Kaolin Co., Ltd.), MS, MS-P, MS-A,
ND, SW, SW-E, SWA, SWB, SSS, S
S, S, talc CTH # 125, surface modified talc (above, product name of Nippon Talc Co., Ltd.), Mistron
850-JS (trade name, manufactured by Nippon Mistron Co., Ltd.) and the like are exemplified. As a concrete grade of mica powder,
Examples include Mica UN (trade name of Nippon Talc Co., Ltd.), Suzolide mica (trade name of Kuraray Co., Ltd.), A-21 (trade name of Yamaguchi Mica Co., Ltd.), Y1000-M (trade name of Yamada Mica Industry Co., Ltd.). To be done.

The main component of diatomaceous earth is hydrous silicic acid, which is an aggregate of porous cells having a Mohs hardness of about 1 to 1.5 and a particle size of about 1 to 50 μm, and has a rod shape, a spindle shape, a tubular shape, or the like. There is a wide variety. As a concrete grade, Celi
te 110, 266, 270, 281, 289, 49
9, 501, 503, 505, 535, 545, 55
0, 560, Super Floss (above, Johns-Manville Corp. (Johns-Mnville Corpo
(trade name manufactured by USA), Radiolite 100, 200, 300, 500, F (above, trade name manufactured by Showa Kagaku Co., Ltd.) and the like.

Graphite is a mineral whose main component is carbon and is roughly classified into artificial graphite obtained by graphitizing coke at a high temperature and natural graphite. The shape is scaly or lumpy, with a Mohs hardness of 1 to 2 and an aspect ratio of 10
It is a soft and smooth powder having a particle size of about 20 and a particle size of about 1 to 50 μm. As artificial graphite, ATNo. 7, No.
10, No. 12, No. 15, No. 20, No. Two
5 (above, trade name by Oriental Sangyo Co., Ltd.) and the like. In addition, as the scaly natural graphite, special CP,
RLT (trade name of Nippon Graphite Industry Co., Ltd.) and the like are exemplified.

For the vulcanization (crosslinking) of the roller rubber composition of the present invention, a usual sulfur vulcanization system can be applied as long as it is a rubber having an unsaturated bond. The sulfur used for the sulfur vulcanization is 0 to 5 with respect to 100 parts by weight of the base rubber.
About 10 parts by weight is added.

As the sulfur, fine powder obtained by pulverizing recovered sulfur is used. For this, Jinhua fine powder sulfur 150 mesh, 200 mesh, 300 mesh, 3
25 mesh (Tsurumi Chemical Industry Co., Ltd. product name)
Is exemplified. Further, surface-treated sulfur having improved dispersibility and the like is also appropriately used.
Examples include 0S, MC, PS, PMC (above, trade name manufactured by Tsurumi Chemical Industry Co., Ltd.).

In order to avoid bloom from unvulcanized rubber, insoluble sulfur is used, which includes Seimi Sulfur (trade name of Nippon Dry Distilling Co., Ltd.), Sanfer, Sanfer 90 (above, Sanshin Chemical Industry Co., Ltd.). An example is a product name manufactured by a corporation.

When a low compression set is required, a sulfur-containing organic compound is used as a vulcanizing agent (crosslinking agent) instead of using no sulfur at all. This includes
Morpholine disulfides such as Actor R (Kawaguchi Chemical Co., Ltd.), Tetramethyl thiuram disulphide such as Axel TMT (Kawaguchi Chemical Co., Ltd.), Accel TET (Kawaguchi Chemical Co., Ltd.) Tetraethylthiraum disulfide, such as
Dipentamethylene thiuram tetrasulfide such as Axel TRA (trade name, manufactured by Kawaguchi Chemical Industry Co., Ltd.) is exemplified, and 0.5 to 100 parts by weight of the base rubber is used.
About 5 parts by weight is added.

Further, in the sulfur vulcanization, in order to improve the properties of the vulcanizate, particularly the compression set and the processing stability, usually 1 to
About 6 types of vulcanization accelerators are used for the base rubber 100.
About 0.5 to 3 parts by weight is used in combination with respect to parts by weight. Examples thereof include thiazoles, thioureas, thalliums, dithiocarbamates and guanidines.

As thiazoles, 2-mercaptobenzothiazole such as Axel M (trade name manufactured by Kawaguchi Chemical Industry Co., Ltd.), dibenzothiazole disulfide such as Axel DM (trade name manufactured by Kawaguchi Chemical Industry Co., Ltd.), and accelerator CZ ( N such as Kawaguchi Chemical Industry Co., Ltd.)
N-oxydiethylene-2-benzothiazole sulfenamide such as cyclohexylbenzothiazole and Axel NS (trade name manufactured by Kawaguchi Chemical Industry Co., Ltd.) and N- such as Axel BNS-R (trade name manufactured by Kawaguchi Chemical Industry Co., Ltd.) Examples thereof include t-butyl-2-benzothiazolesulfenamide and N, N-dicyclohexyl-2-benzothiazolesulfenamide such as Axel DZ-G (trade name, manufactured by Kawaguchi Chemical Industry Co., Ltd.).

The thioureas include Axel EUR
Examples include diethyl thiourea such as (Kawaguchi Chemical Co., Ltd. product name), ethylene thiourea such as Axel 22-S (Kawaguchi Chemical Co., Ltd. product name), and the like. As the thylium, tetramethylthiuram disulphide such as Axel TMT (trade name manufactured by Kawaguchi Chemical Industry Co., Ltd.), tetraethyl thiuram disulphide such as Accel TET (trade name manufactured by Kawaguchi Chemical Industry Co., Ltd.), and Accel TBT (Kawaguchi Chemical Industry Co., Ltd.) (Trade name, manufactured by Co., Ltd.) Tetrabutyl thiuram disulphide, Axel TRA
Examples include dipentamethylene thiuram tetrasulfide such as (Kawaguchi Chemical Co., Ltd. product name) and tetramethyl thiuram monosulfide such as Axel TS (Kawaguchi Chemical Co., Ltd. product name).

The dithiocarbamate salts include zinc dimethyldithiocarbamate such as Axel PZ (trade name manufactured by Kawaguchi Chemical Industry Co., Ltd.), zinc diethyldithiocarbamate such as Axel EZ (trade name manufactured by Kawaguchi Chemical Industry Co., Ltd.), and accelerator BZ ( Examples thereof include zinc dibutyldithiocarbamate (trade name, manufactured by Kawaguchi Chemical Industry Co., Ltd.), tellurium dithiocarbamate (such as Axel TL-PT (trade name, manufactured by Kawaguchi Chemical Industry Co., Ltd.), and the like. Examples of guanidines include diphenylguanidine such as Axel D (trade name, manufactured by Kawaguchi Chemical Co., Ltd.).

As the base rubber of the rubber composition for a roller of the present invention, an ethylene-propylene binary copolymer (EPM) is used.
When a rubber having no unsaturated bond such as is used, an ordinary peroxide can be applied as a crosslinking agent. Examples of the peroxide include Di-cup 40C (He
Examples include dicumyl peroxide such as rcules (USA) and 2,5-dimethyl25-di (tertiary butylperoxy) hexane such as Perhexa 25B-40 (trade name of NOF CORPORATION). It The addition amount is about 1 to 10 parts by weight per 100 parts by weight of the base rubber. In the present invention, during the peroxide vulcanization, methacrylic acid ester or triallyl isocyanurate (TAIC) such as TAIK (Nippon Kasei Co., Ltd.) may be added as a vulcanization aid.

Further, in EPDM having an unsaturated bond and the like, peroxide may be used as a crosslinking agent.
In the rubber composition for a roller of the present invention, in order to obtain a composition having a low hardness, and to aid the mixing / dispersion of the compounding agent, the molding work such as rolling and extrusion is facilitated, and the tackiness of the unvulcanized rubber is increased. In order to facilitate molding by molding, a softening agent of 0 to 80 parts by weight, preferably 0 to 30 parts by weight, may be added to 100 parts by weight of the ion conductive rubber of the base rubber.

As specific softeners, paraffin oil, naphthene oil, aromatic oil, phthalic acid derivative, isophthalic acid derivative, adipic acid derivative, phosphoric acid derivative and the like are preferably used. As the paraffin oil-based softening agent, Diana Process Oil PW-3
2, PW-90, PW-150, PW-380, PS-
32, PS-90, PS-430, PX-32, PX-
90 (or more, Idemitsu Kosan Co., Ltd. product name), Flexon 845 (or more, Esso Oil Co., Ltd. product name), SYNTAC PA-95, PA-100, PA-140 (or more,
Product name of Kobe Oil Chemical Industry Co., Ltd.), Cosmo Process 1
0, 40, 40C (above, trade name of Cosmo Oil Co., Ltd.), Sunper (Sunper) 110, 115, 12
0, 130, 150, 180, 2100, 2210, 2
280 (above, product name of Nippon San Oil Co., Ltd.), Fuccol P-200, P-400, P-500 (above, product name of Fuji Kosan Co., Ltd.), Mitsubishi 10, Mitsubishi 12 (above, Mitsubishi Petroleum Co., Ltd.) Product name) etc. are illustrated.

As the softening agent for the naphthenic oil,
Diana Process Oil NS-24, NS-100, N
M-26, NM-68, NM-150, NM-280,
NP-24, NU-80, NF-90 (above, trade name of Idemitsu Kosan Co., Ltd.), Esso Process Oil 725, 7
65 (above, trade name of Esso Oil Co., Ltd.), SYNTAC N-40, N-60, N-70, N-75, N-85
(These are product names of Kobe Oil Chemicals Co., Ltd.), Shelf Rex 371JY, 371N, 451, N-40, 2
2, 22R, 32R, 100R, 100S, 100S
A, 220RS, 220S, 260, 320R, 680
(These are product names of Shell Japan Co., Ltd.), Sunthene 310, 380, 410, 41
5, 420, 430, 450, 480, 3215, 41
30, 4240, Ciro Light R.A. P. O.
(These are product names of Nippon San Oil Co., Ltd.), Koumorex No. 2 (product name of Nippon Oil Co., Ltd.), Fuccol 1
150N, 1400N (Fuji Kosan Co., Ltd. product name), Mitsubishi 20 (Mitsubishi Oil Co., Ltd. product name), Naplex 32, 38 (Mobil Oil Co., Ltd. product name), Petrex PN-3 ( Yamabun Yuka Co., Ltd. product name) etc. are illustrated.

As the softening agent for the aromatic oil, Diana Process Oil AC-12, AC-460, AE-
24, AE-50, AE-200, AH-16, AH-
58 (above, product name manufactured by Idemitsu Kosan Co., Ltd.), Esso Process Oil 110, 120 (above, product name manufactured by Esso Oil Co., Ltd.), SYNTAC HA-10, HA-15, HA
-30, HA-35 (above, trade name of Kobe Oil Chemicals Co., Ltd.), Cosmo Process 40A (trade name of Cosmo Oil Co., Ltd.) J SO Aroma 790 (trade name of Japan Sun Oil Co., Ltd.), Komorix 300, 700 (above, product name of Nippon Oil Co., Ltd.), Aromax # 1,
# 3, # 5 (Fuji Kosan Co., Ltd. product name), Heavy Process Oil Mitsubishi 34, Mitsubishi 38, Mitsubishi 44 (above,
Mitsubishi Oil Co., Ltd. product name), Mobilsol K, 2
2, 30, 130 (above, trade name of Mobil Oil Co., Ltd.), Petrex LPO-R, LPO-V, PF-
1, PF-2 (above, trade name manufactured by Yamabun Yuka Co., Ltd.) and the like.

As the plasticizer, di- (2-ethylhexyl) phthalate (DOP) such as DOP (trade name, manufactured by Daihachi Chemical Industry Co., Ltd.) and Vinizerizer 80 (trade name, manufactured by Kao Corporation), Leoflex 9P ( Higher alcohol phthalates such as Shell Japan Co., Ltd. product name and Diasizer 11, 99 (above, Mitsubishi Chemical Co. product name), DIOP (Wacker-Chemie (Wack)
er-Chemie (Germany) trade name) such as diisooctyl phthalate (DIOP), Sansocizer DOS (New Nippon Rika Co., Ltd. trade name)
(2-ethylhexyl) sebacate, Alizona2
08 (Arizona Chem)
(American) trade name) such as isooctyl tall oil fatty acid ester, TBP (trade name of Daihachi Chemical Industry Co., Ltd.) such as tributyl phosphate (TBP),
Tributoxyethyl phosphate (TBEP) such as TBEP (trade name manufactured by Daihachi Chemical Industry Co., Ltd.), tricresyl phosphate (TCP) such as Sansosizer TCP (trade name manufactured by Shin Nippon Rika Co., Ltd.), CDP (large) Kresil diphenicle phosphate (CDP), such as Hachika Kogyo Co., Ltd.), Koremoll
Diphenylalkane such as CE 5422 (1 product name manufactured by BASF (Germany)), dibutyldiglycol adipate such as BXA (trade name manufactured by Daihachi Chemical Industry Co., Ltd.), Thiokol TP-95 (Morton International)
(America) trade name) di (butoxyethoxyethyl) adipate, mezamol AZEP (BAYE
Alkyl sulfonic acid phenyl ester such as R AG (Germany) can also be used.

The softening agent is usually used in one or two kinds as appropriate, and if necessary, different kinds of oils may be added together so as to blend the naphthenic oil and the paraffinic oil. In addition, considering the abrasiveness of the surface of the rubber layer when used as a roller, black sub, white sub, candy sub, golden factice, neo factice, sulfur-free factice (above, product name of Tenma Sub Chemical Co., Ltd.) Such a sub (factice) can also be used in an amount of about 5 to 50 parts by weight.

In the present invention, a reinforcing agent such as carbon black or a silica-based filler may be used in an amount of 0 to 80 parts by weight, preferably 0 to 40 parts by weight, based on 100 parts by weight of the base rubber. When it is used in an amount of more than 40 parts by weight, it becomes difficult to obtain a composition having a low hardness and the kneading property of rubber is deteriorated.

As carbon black, Asahi # 90 (trade name, manufactured by Asahi Carbon Co., Ltd.), Show Black N11
0, N134 (above, trade name by Showa Cabot Co., Ltd.), Seast 9 (trade name by Tokai Carbon Co., Ltd.),
SAF such as Diamond Black-A (trade name of Mitsubishi Chemical)
Carbon (average particle size 18-22 μm), Seed 9H
SAF-HS such as (trade name of Tokai Carbon Co., Ltd.)
Carbon (average particle size around 20 μm), Asahi # 80 (trade name of Asahi Carbon Co., Ltd.), Show Black N220 (trade name of Showa Cabot Co., Ltd.), Seast 6 (trade name of Tokai Carbon Co., Ltd.), Diamond Black I , N2
IS such as 20M (above, product name manufactured by Mitsubishi Chemical Corporation)
AF carbon (average particle size 19-29 μm), Asahi # 75
(Asahi Carbon Co., Ltd. product name), Show Black N3
39 (Showa Cabot Co., Ltd. product name), Seast K
N-33 such as H (trade name manufactured by Tokai Carbon Co., Ltd.) and Diablack N339 (trade name manufactured by Mitsubishi Chemical Co., Ltd.)
9 carbons (average particle size around 24 μm), Asahi # 80L (trade name of Asahi Carbon Co., Ltd.), Show Black N219
(Showa Cabot Co., Ltd. product name), Seast 600
(Tokai Carbon Co., Ltd. product name), Dia Black L
ISAF-LS such as I (trade name of Mitsubishi Chemical Corporation)
I such as carbon (average particle size 21 to 24 μm), Asahi # 78 (trade name of Asahi Carbon Co., Ltd.), Seast 5H (trade name of Tokai Carbon Co., Ltd.), Diablack II (trade name of Mitsubishi Chemical Co., Ltd.), etc. -ISAF-HS carbon (average particle size 21 to 31 μm), Asahi # 70 (trade name manufactured by Asahi Carbon Co., Ltd.), Show Black N330 (trade name manufactured by Showa Cabot Co., Ltd.), Seast S (trade name manufactured by Tokai Carbon Co., Ltd.) ), Diablack-H (trade name of Mitsubishi Chemical Co., Ltd.), and other HAF carbons (26 to 30)
μm), Asahi # 70H (trade name of Asahi Carbon Co., Ltd.),
Seaf 3H (trade name of Tokai Carbon Co., Ltd.), HAF-HS carbon (average particle size 22 to 30 μm) such as Diablack-SH (trade name of Mitsubishi Chemical Co., Ltd.), Asahi # 70IH (product of Asahi Carbon Co., Ltd.) Name), Show Black N351 (trade name of Showa Cabot Co., Ltd.),
N-351 carbon (average particle size around 29 μm) such as Seast NH (trade name manufactured by Tokai Carbon Co., Ltd.), Asahi 70
L (trade name of Asahi Carbon Co., Ltd.), Show Black N
326 (Showa Cabot brand name), Seast 300
(Tokai Carbon Co., Ltd. product name), Dia Black L
LI- such as HAF-LS carbon (average particle size 25 to 29 μm) such as H (Mitsubishi Chemical Co., Ltd.), Asahi 70IN (Asahi Carbon Co., Ltd. product name), Seast N (Tokai Carbon product name), etc. HAF carbon (average particle size 29
(around μm), Asahi 60H (trade name of Asahi Carbon Co., Ltd.), Show Black MAF (trade name of Showa Cabot Co., Ltd.), Seast 116 (trade name of Tokai Carbon Co., Ltd.), Diablack N550M, SF, M (above) , Mitsubishi Chemical Co., Ltd.) MAF carbon (average particle size 30 to 35 μm), Asahi # 60, # 60U (above Asahi Carbon Co., Ltd. product name), Show Black N
550 (Showa Cabot Co., Ltd. product name), Seast SO, FM (above, Tokai Carbon Co., Ltd. product name),
Diamond black-E, EY (above, trade name of Mitsubishi Chemical Co., Ltd.) FEF carbon (average particle size 40 ~ 52μ
m), Asahi # 50, # 50U, # 51 (above, product name by Asahi Carbon Co., Ltd.), Seast S (product name by Tokai Carbon Co., Ltd.), Diablack R (product name by Mitsubishi Chemical Co., Ltd.), etc. SRF carbon (average particle size 58-94μ
m), Asahi # 35 (trade name of Asahi Carbon Co., Ltd.), SRA-LM carbon such as Diablack N760M, LR (above, trade name of Mitsubishi Chemical Co., Ltd.), Asahi # 55 (trade name of Asahi Carbon Co., Ltd.) ), Seast V (trade name of Tokai Carbon Co., Ltd.), etc.
4 μm) is exemplified.

As the silica type filler, Aerosil 130, 200, 300, 380, R972, R974.
(Above, product name manufactured by Nippon Aerosil Co., Ltd.) and dry silica such as Reorosil QS13, QS30, QS38, QS102 (above, product name manufactured by Tokuyama Co., Ltd.), Carplex # 67, # 80, # 100, # 1120,
XR, 22S, CS-5, CS-7 (above, product name by Shionogi Pharmaceutical Co., Ltd.), Shilton A, R-2 (above, product name by Mizusawa Chemical Co., Ltd.) and Tokushiru AL-1,
Gu, U, UR, US (above, trade name of Tokuyama Corporation) and nip seals AQ, ER, LP, NA, NP, N
SK, VN3 (above, trade name of Nippon Silica Co., Ltd.)
And Ultrasil VN3 (Degussa (Deguss
a) (Germany) product name and Hi-Sil 233 (PPPG Industries (PPG Indu)
Examples thereof include wet silica such as a product (trade name, manufactured by USA).

Also, white luster flowers CC, DD, O, U (above,
Activated calcium carbonate such as Shiraishi Kogyo Co., Ltd., special calcium carbonate such as Shiroishi A, AA (above, Shiroishi Kogyo Co., Ltd. product name), such as Mistron Paper (Nippon Mistron Co., Ltd. product name) Magnesium silicate, Hytron, Hytron A, Microlite, US-100, US-150S, US-150S
Magnesium silicate such as S, Hirac, Hirac SS (above, trade name of Takehara Chemical Industry Co., Ltd.) may be used in combination.

In the rubber composition for a roller of the present invention, if necessary, for the purpose of dimensional stability, low cost, etc., about 5 to 100 parts by weight of an increasing filler is added to 100 parts by weight of the base rubber. You may add.

As the above-mentioned extended filler, Green B is used.
all (trade name of Inoue Lime Industry Co., Ltd.) and Tamapearl TP-121, TP-121R, TP222H, TP-
222HS, TP-123, TP-123CS (above,
Okutama Kogyo Co., Ltd.) and Silver W (Shiroishi Kogyo Co., Ltd.) light calcium carbonate, Whitelon SSB, SB, S (above, Shiroishi Calcium Co., Ltd. trade name) and Sunlight # 100, # 300, # 70
0, # 800, # 1000, # 1500, # 2000,
# 2200, # 2500 (above, trade name of Takehara Chemical Industry Co., Ltd.), NS # 100, NS # 200, NS # 40
0, NS # 600, NS # 1000, NS # 2300,
NS # 2500, NS # 2700, NS # 3000, S
S # 30, SS # 80, NN # 200, NN # 500
(These are product names of Nitto Koka Kogyo Co., Ltd.) and Super S, SS, SSS, 4S, # 1500, # 1700, #
Heavy calcium carbonate such as 2000 (above, trade name manufactured by Maruo Calcium Co., Ltd.), JET-S (trade name manufactured by Asada Flour Milling Co., Ltd.) and Crystallite AA, VX-S, VX-
S-2, VX-SR (above, product name of Tatsumori Co., Ltd.) and Min-U-Sil 5, 10, 15, 30 (above, US Silica (USA) company) (Product name) and Imsil A-10, A-15,
A-25, A-108 (above, Illinois Minerals (USA)
Quartz powder (such as product name), JA-30W, 325M
(These are product names manufactured by Asada Flour Milling Co., Ltd.) and NYAD32.
5, 400, 1250, G (above, NYCO)
(USA) product name) wollastonite (calcium metasilicate), Celite 270, 28
1, 501, 503, 505, 535, 545, 56
0, 577, FC, SSC, Super Floss,
SnowFloss (above, Johns-Manville (Jo
hns-Manville) (American product name)
Or Radio Light # 100, # 200, # 300, # 50
0, # 500S, # 600, # 700, # 800, # 8
00-S, # 900, F, SPF, fine flow A,
Fine flow B (above, trade name of Showa Chemical Industry Co., Ltd.), diatomaceous earth, zinc oxide such as two kinds of zinc flower (trade name of Sakai Chemical Industry Co., Ltd.), aluminum sulfate, barium sulfate, calcium sulfate, oxidation Titanium, molybdenum disulfide, etc. are exemplified, and usually one to several kinds are used together with the reinforcing filler.

The rubber composition for a carrying roller of the present invention may contain, if necessary, in order to improve the rubber kneading property and extrudability.
About 0.3 to 5 parts by weight of a lubricant or an internal release agent can be added to 100 parts by weight of the base rubber. Addition of an excessively large amount causes bloom, bleeding, poor fusion, and the like, so it is usually added in an amount of about 0.5 to 1 part by weight, depending on the type.

As the above-mentioned lubricant and internal release agent, Mitsui High Wax 100P, 110P, 200P, 210P, 2
Low molecular weight polyethylene such as 20P, 320P, 420P (above, trade name of Mitsui Petrochemical Co., Ltd.), LUNAC S-20, S-30, S-40 (above, trade name of Kao Corporation) and FA-KR. (Product name of NOF CORPORATION)
And ADEKA fatty acid SA-20, SA-300, SA-40
0 (above, product name manufactured by Asahi Denka Co., Ltd.), stearic acid, plastrosin, fatty acid amide such as plastrosin S (product name manufactured by Fujisawa Pharmaceutical Co., Ltd.), Armowax EBS (manufactured by Lion Akzo Co., Ltd.) Product name)
Fatty acid nitrogen derivatives such as, sorbitan monolaurate (lauric acid sorbitan ester) such as Leodol SP-L10 (trade name, manufactured by Kao Corporation), Leodol SP-
Sorbitan monopalmitate (sorbitan palmitate) such as P10 (trade name manufactured by Kao Corporation), sorbitan monostearate (sorbitan ester stearate) such as Leodol SP-S10 (trade name manufactured by Kao Corporation), Leodol SP- Sorbitan monooleate (sorbitan oleate) such as O10 (trade name manufactured by Kao Corporation), sodium dialkylsulfosuccinate (sodium di2ethylhexyl sulfosuccinate, etc.) such as Lipal 860K (trade name manufactured by Lion Corporation), Aflex42 (Rain Chemie (Rei
n Chemi (Germany) trade name, a mixture of polar compounds and surfactants, Struktol A60.
(Seal and Zylaker (Schill &
Higher unsaturated fatty acid zinc such as Seilacher (Germany), Struktol EF44
(Seal and Zylaker (Schill &
Special fatty acid zinc such as Seilacher (Germany), Struktol WB16 (Still & Sailer)
a mixture of fatty acid calcium and fatty acid amide, such as Lacher) (Germany), Struktol
WB42 (Seal and Zylaker (Schill
l & Seilacher) (Germany)
Mixtures of fatty acid esters and fatty acid metal salts, such as Str
A mixture of higher fatty acid ester hydrate and an inorganic carrier such as uktol WB212 (trade name of Schill & Seilacher (Germany)), Struktol WB222.
(Seal and Zylaker (Schill &
Polyphenol alcohol fatty acid ester such as Seilacher (Germany), Struktol WS
180, WS280 (above, trade name of Seal & Seilacher (Germany), Styl), St
A mixture of a high molecular weight natural fatty alcohol and an aliphatic soap treated with an inert filler, such as ruktol W33FL (trade name of Schill & Seilacher (Germany)), K
Examples thereof include silicone oils such as F96 (trade name of Shin-Etsu Chemical Co., Ltd.), paraffin wax, montan wax, and the like. Vulcanization or crosslinking of the composition of the present invention,
It can be performed by a method well known to those skilled in the art.

[0036]

EXAMPLES Next, more specific examples of the conveying roller according to the present invention will be shown below, but the present invention is not limited to these. Example 1 Esprane 501A as EPDM as a base rubber
(Sumitomo Chemical Co., Ltd. product name) 100 parts by weight, zinc oxide 2 kinds of zinc oxide (Sakai Chemical Co., Ltd. product name) 5 parts by weight, stearic acid Lunac S-20
1 part by weight of (Kao Co., Ltd.), 1.5 parts by weight of Jinhua Infineon Sulfur 325 mesh as a vulcanizing agent, and 1.0% of Accel PZ (Kawaguchi Chemical Co., Ltd.) as a vulcanization accelerator. 1 part by weight and 1 part by weight of Accel TMT (trade name of Kawaguchi Chemical Industry Co., Ltd.), 0.5 part by weight of Accel M (trade name of Kawaguchi Chemical Industry Co., Ltd.), and as a filler as shown in Table 1. Ten parts by weight of talc were each weighed. Each component was kneaded with a known rubber kneading roll to obtain an unvulcanized rubber composition for rollers. Next, the rubber composition for a roller was prepared with an inner diameter of 8.5 mm and an outer diameter of 1
After being extruded by an extruder to have a thickness of 7 mm, it was put in a steam oven and vulcanized at 0.48 MPa (158 ° C.) for 55 minutes to form a hose-shaped vulcanized molded product. Next, the rubber layer of the core metal was inserted into a metal shaft having an outer diameter of φ10 mm, and was then ground to φ16 mm by a grinder to manufacture the rubber roller 1 shown in FIG.

Examples 2 to 31 Rubber rollers were prepared in the same manner as in Example 1 except that
Table -1 to 3 show each component and its content in the rubber composition.
Changed as described in.

Comparative Example 1 Esprane 501A as EPDM as a base rubber
(Sumitomo Chemical Co., Ltd. product name) 100 parts by weight, Diana Process Oil PW-380 (Idemitsu Kosan Co., Ltd. product name) as a softening agent, 5 parts by weight, zinc oxide 2 kinds of zinc oxide (Sakai Chemical Industry Co., Ltd.) 5 parts by weight (trade name, manufactured by K.K.), 1.0 part by weight of Lunac S-20 (trade name, manufactured by Kao Co., Ltd.) as stearic acid, and 1.5 parts by weight of 325 mesh of Jinhua fine powder sulfur as a vulcanizing agent. Accelerator PZ (trade name of Kawaguchi Chemical Industry Co., Ltd.) was used as a sulfur accelerator.
0 parts by weight, 1.0 part by weight of Accel TMT (trade name of Kawaguchi Chemical Industry Co., Ltd.), 0.5 parts by weight of Accel M (trade name of Kawaguchi Chemical Industry Co., Ltd.), and 50 parts by weight of SRF carbon. Each was weighed. Each component was kneaded with a known rubber kneading roll to obtain an unvulcanized rubber composition for rollers. Hereinafter, a rubber composition for a roller was obtained according to the method of Example 1.

Comparative Example 2 100 parts by weight of chlorobutyl 1066 (trade name, manufactured by Nippon Butyl Co., Ltd.) as a chlorinated butyl rubber as a base rubber, and 5 parts by weight of two kinds of zinc oxide (trade name, manufactured by Sakai Chemical Industry Co., Ltd.) as zinc oxide. Part, Lunac S- as stearic acid
20 (trade name, manufactured by Kao Co., Ltd.) 1.0 part by weight, 0.5% by weight of 325 mesh fine powder sulfur of Jinhua stamp as a vulcanizing agent,
As a vulcanization accelerator, 1.5 parts by weight of Accel DM (trade name, manufactured by Kawaguchi Chemical Industry Co., Ltd.) and 75 parts by weight of SRF carbon were weighed. Each component was kneaded with a known rubber kneading roll to obtain an unvulcanized rubber composition for rollers. Hereinafter, a rubber composition for a roller was obtained according to the method of Example 1. Comparative Example 3 JSRN250S as NBR which is a base rubber is 10
A rubber composition for a roller was obtained according to the method of Comparative Example 2 except that 0 part by weight was used and 75 parts by weight of talc was used as a filler. Comparative Example 4 JSRN250S as NBR, which is a base rubber, is 10
A roller rubber composition was obtained according to the method of Comparative Example 2 except that 0 part by weight was used and 75 parts by weight of SRF carbon was used as a filler.

Performance Test Next, as a performance test, the dynamic friction coefficient of the above roller was measured by AS.
It was measured according to the e method of TM D1894. That is, the method e of 4 of ASTM D189 will be described with reference to the schematic diagram shown in FIG. 2. The method is screwed with a screw rod 10 rotated by a motor (not shown), and
Sample table 1 that can be moved forward and backward by reverse rotation
1, a PPC paper 12 is placed on the one hand, while a rubber ring is attached to a holder and a sample 13 serving as a feeding roller is placed on the PPC paper 12 without any load on the PPC paper 12. From that state, the vertical load W0 is applied again so that the vertical load W0 exists on the PPC paper 12. Further, in the drawing, reference numeral 14 is a measuring rod fixedly mounted on the sample 13, reference numeral 15 is a strain gauge with which the measuring rod 14 is in contact, reference numeral 16 is an amplifier, and reference numeral 17 is a recorder. As described above, when the screw rod 10 is rotated by the operation of the motor and the sample base 11 screwed with the screw rod 10 is moved in the arrow direction, the sample base 11 is moved along with this movement.
Sample 1 placed on PPC paper 12 placed on top
3 also moves with the measuring rod 14. Due to this movement, even if the tip of the measuring rod 14 comes into contact with the strain gauge 15, the sample stage 11 still moves, and the strain gauge 15 detects the frictional force F. The frictional force F is low in the sample having good slipperiness and is high in the adhesive sample. Therefore, the coefficient of dynamic friction μ
Is calculated from the above W0 and F by μ = F / W0. With this, the coefficient of dynamic friction μ was measured.

Paper Passing Test Next, a paper passing test was carried out on the conveying rubber rollers of Examples 1 to 31 and Comparative Examples 1 to 4. For the paper passing test, BJ F300 manufactured by Canon Inc. was used as a printer, and
20,000 sheets of PC paper were continuously passed and evaluated by the paper feeding property of the rubber roller for conveyance, particularly whether or not double feeding or non-feeding occurred. The compositions of Examples 1 to 31 and Comparative Examples 1 to 4 and the results of evaluation tests are shown in Tables 1 to 3 below.

[0042]

[Table 1]

[0043]

[Table 2]

[0044]

[Table 3]

As a result, the roller of Comparative Example 1 had a high dynamic friction coefficient of 2.8 before passing the sheet, so that the sheet was passed without any problem at the initial stage, but double feeding occurred at the time of feeding 2,000 sheets. did.
Then, when the dynamic friction coefficient of the roller after passing 2,000 sheets was measured, it was a very low value of 0.9, and it was found that it was unsuitable as a conveying roller because paper dust was remarkably attached. On the other hand, the composition of the present invention has a high dynamic friction coefficient at the roller of 1.8 to 3.2, and a small amount of paper dust adheres to the roller even after passing 20,000 sheets, so the dynamic friction coefficient is 1. Since it holds 2 or more, it has been found that the paper feeding property is good and the property as a carrying roller is good.

[0046]

EFFECT OF THE INVENTION The rubber composition of the present invention has an extremely excellent effect that it is possible to obtain a roller which is difficult for paper dust to adhere and which has a good feeding property for a recording medium such as PPC paper.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an example of an embodiment of a conveying roller using a rubber composition for a roller according to the present invention.

FIG. 2 is a schematic diagram showing e method 4 of ASTM D189.

[Explanation of symbols]

1 roller 2 core metal 3 Elastic layer 10 screw rod 11 sample table 12 PPC paper 13 samples 14 Measuring rod 15 strain gauge 16 amps 17 recorder

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yukio Takao             3-30-1 Horikiri, Katsushika-ku, Tokyo Stock market             Arai Factory F term (reference) 3F049 AA03 CA12 CA15 CA16 CA21                       LA02 LA05 LA07 LB01                 3F343 FA01 FB02 FB03 FB05 JA11                       KB04                 3J103 AA02 AA32 BA41 CA03 EA02                       EA03 FA07 FA12 GA02 GA57                       GA58 HA03 HA12 HA22 HA53                 4J002 AC00W AC00X BB15W BB15X                       BB24W BB24X DA026 DJ006                       DJ046 DJ056 FA016 FA086                       FD016 GQ00 GS00 GT00

Claims (5)

[Claims] 1. A rubber composition for a conveying roller, wherein 10 to 300 parts by weight of a flake filler is added to 100 parts by weight of rubber. 2. The rubber composition for a conveying roller according to claim 1, wherein the rubber is EPDM or halogenated butyl rubber or a blend thereof. 3. The flaky filler is talc, diatomaceous earth,
The rubber composition for a conveyor roller according to claim 1 or 2, comprising at least one filler selected from the group consisting of graphite and mica powder. 4. A conveying roller, wherein an elastic layer is formed on the outer periphery of a core metal with the rubber composition for a conveying roller according to claim 1, 2 or 3. 5. A method of manufacturing a carrying roller, which comprises forming a hose-shaped tube made of the composition for a carrying roller according to claim 1, 2 or 3 in advance, inserting the hose into a shaft, and polishing the outer circumference.