JP2002235731A - Roller for oa equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller for OA equipment capable of sufficiently preventing exfoliation of a paint film layer without any interposition of adhesive. SOLUTION: The paint film layer 3 composed of a rubber component containing the following A and B along the outer circumferential face of a base rubber layer 2 mainly composed of silicone rubber and having its outer circumferential face activated, in the outer circumference of a shaft body 1. A. Rubber material (wherein fluororubber and hydrogenated acrylonitrile - butadiene based rubber are excluded) B. Silane coupling agent expressed by either of the following general formulae (1) and (2). Y1-C3H6Si(OCnH2n+1)3...(1) [In the formula, Y1 shows a vinyl group, a glycidoxy group, a mercapto group, amino group, an epoxy group, an isocyanate group, a methacrylic group, or other substituents including these functional groups. n is 1 or 2.] Y2-Si(OC2H4 OCH3)3...(2) [In the formula, Y2 is a vinyl group.].

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller for OA equipment, such as a developing roller, a charging roller, a transfer roller, a paper feeding roller, a charge eliminating roller, and a fixing roller, used for OA equipment such as a copying machine, a printer, and a facsimile machine. It is about.

[0002]

2. Description of the Related Art As a roller for OA equipment such as a developing roller, for example, a base rubber layer is formed by a silicone rubber on the outer periphery of a shaft body, and further, an adhesive layer is formed on an outer peripheral surface of the base rubber layer by an adhesive layer. Rollers having a coating layer formed of a rubber material (coating liquid) such as hydrogenated acrylonitrile-butadiene rubber (hereinafter abbreviated as "H-NBR") and acrylonitrile-butadiene rubber (hereinafter abbreviated as "NBR") have been put to practical use. ing. And, on the roller, the coating layer is not easily separated from the base rubber layer,
For example, the outer peripheral surface of the base rubber layer is subjected to a treatment such as corona discharge.

[0003]

However, when the coating liquid is applied onto the base rubber layer to which the adhesive is applied to form a coating film layer, the adhesive is mixed into the coating liquid. In some cases, when this mixing occurs, there arises a problem that the performance of the coating film layer composed of the coating liquid is reduced. In addition, since the adhesive is easily deactivated, there is a problem that the quality of the obtained roller is likely to vary. Further, there is a problem that the production cost is increased due to an increase in the number of steps for applying the adhesive.

[0004] On the other hand, when a coating layer is formed using H-NBR, the hardness of the coating layer is high, so that there is a problem that wrinkles and scratches are easily formed on the surface of the obtained roller.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a roller for OA equipment which can sufficiently prevent peeling of a coating layer without the use of an adhesive. .

[0006]

In order to achieve the above-mentioned object, a roller for OA equipment of the present invention has silicone rubber as a main component on the outer periphery of a shaft, and the outer peripheral surface thereof is activated. A roller for OA equipment having a base rubber layer formed thereon and a coating layer formed on the outer peripheral surface of the base rubber layer, wherein the coating layer contains the following (A) and (B): It is configured to be formed by objects. (A) Rubber material (excluding fluororubber and hydrogenated acrylonitrile-butadiene rubber). (B) A silane coupling agent represented by any one of the following general formulas (1) and (2).

Embedded image Y ¹ -C ₃ H ₆ Si (OC _n H _{2n + 1} ) ₃ (1) wherein Y ¹ is a vinyl group, a glycidoxy group, a mercapto group, an amino group, an epoxy group, an isocyanate group , A methacryl group or other substituents containing these functional groups. N is 1 or 2. ]

Embedded image Y ² —Si (OC ₂ H ₄ OCH ₃ ) ₃ (2) wherein Y ² is a vinyl group. ]

That is, the present inventors have conducted a series of studies focusing on a coating layer forming material in order to solve the above problems.
As a result, even when a rubber material (excluding fluororubber) other than hydrogenated acrylonitrile-butadiene rubber is used as the coating film layer forming material, the specific silane cup is used as the coating film layer forming material. By blending the ring agent (B), the silane coupling agent (B) chemically acts on the activation-treated surface of the base rubber layer containing silicone rubber as a main component, thereby firmly forming the coating layer. The inventors of the present invention have found out that it is not necessary to apply a conventional adhesive when forming a coating film layer for fixing, and arrived at the present invention.

Here, in the present invention, "activation processing"
The term “treatment” refers to a process of causing a chemical change or the like on the outer peripheral surface of the base rubber layer by corona discharge, plasma discharge, or the like.

Particularly, the silane coupling agent of the above (B) is γ-mercaptopropyltrimethoxysilane, γ-
(Methacryloxypropyl) trimethoxysilane, vinyltris (β-methoxyethoxy) silane, γ-glycidyloxypropyltrimethoxysilane, N-β (aminoethyl) γ-aminopropyltrimethoxysilane, γ-
Aminopropyltriethoxysilane, N-phenyl-γ
-When at least one member selected from the group consisting of aminopropyltrimethoxysilane, bispropyltriethoxysilane tetrasulfide, and propyltriethoxysilane isocyanate, the coating layer is more firmly bonded to the base rubber layer. .

When acrylonitrile-butadiene rubber (NBR) is used as the rubber material (A), a coating layer having a lower hardness can be obtained than when hydrogenated acrylonitrile-butadiene rubber is used.

[0011]

Next, embodiments of the present invention will be described in detail.

As shown in FIG. 1, for example, a roller for OA equipment according to the present invention includes a shaft 1, a base rubber layer 2 formed on the outer peripheral surface of the shaft 1, and an outer periphery of the base rubber layer 2. And a coating layer 3 formed on the surface. And
The above-described activation treatment is performed on the outer peripheral surface of the base rubber layer 2.

The shaft 1 is not particularly limited. For example, a metal core or a hollow metal cylinder is used. And, as the metal material, aluminum, stainless steel and the like can be mentioned.

The silicone rubber which is the main component of the base rubber layer 2 formed on the outer peripheral surface of the shaft 1 is not particularly limited, but is a dimethyl silicone polymer having a vinyl group added as a crosslinking site to a dimethyl silicone polymer. To which dimethyl silicone oil is added.

In the present invention, the phrase "contains silicone rubber as a main component" means that the base rubber layer 2 includes only silicone rubber.

The base rubber layer 2 may contain a conductive agent such as carbon black in addition to the silicone rubber.

The coating layer 3 formed on the outer peripheral surface of the base rubber layer 2 is formed of a rubber composition containing a rubber material (A) and a specific silane coupling agent (B).

The rubber material (A) is not particularly limited as long as it is other than hydrogenated acrylonitrile-butadiene rubber and fluorine rubber. For example, acrylonitrile-butadiene rubber (NBR), acrylic rubber (A)
CM), butadiene rubber (BR), isoprene rubber (I
R), styrene-butadiene rubber (SBR), chloroprene rubber (CR), hydrin rubber (ECO, CO), urethane rubber and the like. Among them, NBR is preferably used from the viewpoint of low hardness.

The specific silane coupling agent (B) includes those represented by any one of the following general formulas (1) and (2).

[0020]

Embedded image Y ¹ -C ₃ H ₆ Si (OC _n H _{2n + 1} ) ₃ (1) wherein Y ¹ is a vinyl group, a glycidoxy group, a mercapto group, an amino group, an epoxy group, an isocyanate group , A methacryl group or other substituents containing these functional groups. N is 1 or 2. ]

[0021]

Embedded image Y ² —Si (OC ₂ H ₄ OCH ₃ ) ₃ (2) wherein Y ² is a vinyl group. ]

The silane coupling agent represented by the general formula (1) is preferably γ-mercaptopropyltrimethoxysilane, γ- (methacryloxypropyl) trimethoxysilane, γ-glycidyloxypropyltrimethoxysilane. , N-β (aminoethyl) γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, bispropyltriethoxysilane tetrasulfide, propyltriethoxysilane isocyanate Is raised. Further, as the silane coupling agent represented by the general formula (2), preferably, vinyltris (β-methoxyethoxy) silane is used.
These silane coupling agents may be used alone or in combination of two or more. Among them, γ-mercaptopropyltrimethoxysilane is more preferably used in that it does not affect the conductivity.

The mixing ratio of the specific silane coupling agent (B) is not particularly limited, but is 0.01 to 100 parts by weight (hereinafter abbreviated as "parts") of the rubber material (A). It is preferable to set the range to 15 parts. It is more preferably in the range of 0.1 to 5 parts. That is, the content of the specific silane coupling agent (B) is 0.0
When the amount is less than 1 part, the effect of the specific silane coupling agent (B) is not sufficiently exerted, and there is a tendency that delamination tends to occur. Conversely, when the amount exceeds 15 parts, the hardness of the formed coating layer 3 is increased. Is too high.

The rubber composition as the material for forming the coating film layer 3 contains, in addition to the components (A) and (B), a conductive agent,
A foaming agent, a cross-linking agent, a cross-linking accelerator, an oil and the like may be appropriately compounded.

The material for forming the coating film layer 3 is used as a coating liquid by dissolving it in an organic solvent or the like. Examples of the organic solvent include methyl ethyl ketone (MEK), methanol, toluene, isopropyl alcohol, methyl cellosolve, dimethylformamide and the like. These may be used alone or in combination of two or more. Particularly, it is preferable to use methyl ethyl ketone as the organic solvent from the viewpoint of solubility in the material for forming the coating layer 3. The viscosity of the coating liquid thus obtained is preferably set to 0.005 to 6 Pa · s from the viewpoint of coatability and the like.

The roller for OA equipment of the present invention can be manufactured, for example, as follows.

That is, first, each component for the base rubber layer 2 forming material is kneaded by a kneader such as a kneader to prepare a base rubber layer 2 forming material. It is poured into a gap between the metal shaft body (core bar) 1 on which 15 is set and the cylindrical mold 16. Then, the top lid 17
Is externally fitted to the cylindrical mold 16 and the entire roller mold is heated to cure the base rubber layer 2 forming material (150 to 22).
(0.degree. C..times.20 minutes), take out of the roller mold, and form a base rubber layer 2. FIG. The outer peripheral surface of the base rubber layer 2 thus formed is activated by performing a corona discharge treatment.

On the other hand, a mixture of a rubber material (A), a silane coupling agent (B) and, if necessary, components such as a conductive agent is kneaded together with an organic solvent in a kneading machine such as a kneader. A forming material (coating liquid) is prepared.

Next, the coating liquid is applied to the outer peripheral surface of the base rubber layer 2 which has been subjected to the corona discharge treatment. The coating method is not particularly limited, and a conventional method such as a dipping method, a spray method, a roller coating method, or the like can be applied. After the coating, the coating film layer 3 is formed on the outer peripheral surface of the base rubber layer 2 by performing drying and heat treatment. In this manner, a two-layer OA device roller as shown in FIG. 1 can be obtained. In the OA appliance roller thus obtained, the thickness of the base rubber layer 2 is usually preferably set in the range of 0.5 to 10 mm, particularly preferably 1 to 5 mm. Also,
The thickness of the coating layer 3 is preferably set in the range of 1 to 100 μm, particularly preferably 3 to 30 μm.
m.

The activation treatment is not limited to the corona discharge treatment, but may be performed by, for example, a plasma discharge treatment.

The roller for OA equipment of the present invention is not limited to the two-layer structure.
The outer surface may be further provided with a surface layer.

The roller for OA equipment of the present invention can be applied to, for example, a developing roller, a charging roller, a transfer roller, a paper feeding roller, a charge eliminating roller, a fixing roller, and the like.

Next, examples will be described together with comparative examples.

[0034]

Example 1 [Preparation of base rubber layer forming material] X-34
100 parts of -424 A / B (silicone rubber, Shin-Etsu Chemical Co., Ltd.) and 100 parts of X-34-387 A / B (silicone rubber, Shin-Etsu Chemical Co., Ltd.) are mixed and dispersed to form a base rubber layer. Materials were prepared.

[Preparation of coating layer forming material] 100 parts of NBR (Nipole DN401, manufactured by Zeon Corporation), 1 part of γ-mercaptopropyltrimethoxysilane (A-189, manufactured by Nippon Unicar), and stearic acid ( Lunack S3
0, manufactured by Kao Corporation) and 0.5 parts of zinc white (ZnO),
30 parts of acetylene black, 1.07 parts of Suncellar CZ-G (manufactured by Sanshin Chemical Co., Ltd.), 0.49 parts of Noxeller BZ-P (manufactured by Ouchi Shinko Chemical Co., Ltd.), and 1 part of powdered sulfur are mixed and dispersed. Thus, a rubber composition as a coating layer forming material was prepared.

[Preparation of Roll] Next, as the shaft 1, S
A core metal made of US303 (diameter 10 mm) was prepared, and an adhesive applied to the outer peripheral surface thereof was set inside a roller mold. The base rubber layer was placed in a gap between the shaft body and the inner peripheral surface of the roller mold. 2. Cast the compound as the forming material (Fig. 2
After heating and vulcanizing (180 ° C. × 1 hour), demolding and further secondary vulcanizing treatment (200 ° C. × 4 hours), the base rubber layer 2 (thickness) 5mm)
Was formed. The shaft body 1 with the base rubber layer 2 thus obtained is removed from the mold, and a corona discharge is generated on the outer peripheral surface of the base rubber layer 2 using a high-frequency power supply, and the distance from the electrode is 3 mm. The corona treatment was performed at an angle of 90 degrees for 10 seconds. Then, after applying the coating liquid composed of the above-mentioned coating film layer forming material to the outer peripheral surface of the base rubber layer 2 which has been subjected to the above-mentioned treatment, the coating liquid layer 3 is applied to the outer peripheral surface of the base rubber layer 2 by performing drying and heat treatment. (Thickness: 5 μm) to obtain a roller having a two-layer structure (see FIG. 1).

[0037]

Example 2 A coating was performed in the same manner as in Example 1 except that 5 parts of γ-glycidyloxypropyltrimethoxysilane (A-187, manufactured by Nippon Unicar Co., Ltd.) was used instead of γ-mercaptopropyltrimethoxysilane. A film layer forming material was prepared. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0038]

Example 3 A coating layer forming material was prepared in the same manner as in Example 1 except that the mixing ratio of γ-mercaptopropyltrimethoxysilane was changed to 15 parts. And Example 1
A material for forming a base rubber layer was prepared in the same manner as in Example 1, and a roller was manufactured by the same manufacturing method as in Example 1.

[0039]

Example 4 A coating layer forming material was prepared in the same manner as in Example 1 except that the mixing ratio of γ-mercaptopropyltrimethoxysilane was changed to 0.01 part. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0040]

Example 5 A coating layer forming material was prepared in the same manner as in Example 1 except that the mixing ratio of γ-mercaptopropyltrimethoxysilane was changed to 20 parts. And Example 1
A material for forming a base rubber layer was prepared in the same manner as in Example 1, and a roller was manufactured by the same method as in Example 1.

[0041]

Example 6 Example 1 except that the mixing ratio of γ-mercaptopropyltrimethoxysilane was changed to 0.005 parts.
In the same manner as in the above, a coating film layer forming material was prepared. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0042]

Example 7 100 parts of ACM (Denka ER3400, manufactured by Denki Kagaku), 5 parts of γ- (methacryloxypropyl) trimethoxysilane (A-174, manufactured by Nippon Unicar) and 0.5 part of stearic acid , 5 parts of zinc oxide (ZnO), 30 parts of acetylene black, 11 parts of Diak # 11, and 2 parts of Soksinol DT (manufactured by Sumitomo Chemical Co., Ltd.) are mixed and dispersed to obtain a rubber composition as a coating layer forming material. Was prepared. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0043]

Example 8 100 parts of BR (Nipol BR1220NM, manufactured by Zeon Corporation), 5 parts of γ-mercaptopropyltrimethoxysilane, 0.5 part of stearic acid, 5 parts of zinc white (ZnO), and acetylene black 30 , 1.07 parts of Suncellar CZ-G (manufactured by Sanshin Chemical Co., Ltd.), 0.49 parts of Noxeller BZ-P (manufactured by Ouchi Shinko Chemical Co., Ltd.), and 1 part of powdered sulfur were mixed and dispersed, A rubber composition as a film layer forming material was prepared. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0044]

Embodiment 9 100 parts of IR (Kuraprene IR-10, manufactured by Kuraray Co., Ltd.), 5 parts of γ-mercaptopropyltrimethoxysilane, 0.5 part of stearic acid, and zinc white (ZnP)
O) 5 parts, 30 parts of acetylene black, 1.07 parts of Suncellar CZ-G, and 0.4 of Noxeller BZ-P
9 parts and 1 part of powdered sulfur were mixed and dispersed to prepare a rubber composition as a coating layer forming material. Then, the same base rubber layer forming material as in Example 1 was prepared.
A roller was manufactured by the same manufacturing method as that described above.

[0045]

Example 10 Hydrin rubber (Epichromer CG10
2, Daiso Corporation) 100 parts, γ-mercaptopropyltrimethoxysilane 5 parts, stearic acid 0.5 part, zinc white (ZnO) 5 parts, and acetylene black 30
Parts, 5 parts of hydrotalcite DHT-4A (manufactured by Kyowa Chemical Industry Co., Ltd.), 1.07 parts of Suncellar CZ-G, 0.49 part of Noxeller BZ-P, and 1 part of powdered sulfur are mixed and dispersed. Then, a rubber composition as a coating layer forming material was prepared. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0046]

EXAMPLE 11 100 parts of SBR (Tuffden 2000R, manufactured by Asahi Kasei Corporation), 5 parts of γ-mercaptopropyltrimethoxysilane, 0.5 part of stearic acid, and zinc white (ZnH)
O) 5 parts, acetylene black 30 parts, Noxeller DM-P (Ouchi Shinko Chemical Co., Ltd.) 1.5 parts, Noxeller TRA (Ouchi Shinko Chemical Co., Ltd.) 0.6 parts, and powder sulfur 0.
And 43 parts by weight to prepare a rubber composition as a coating layer forming material. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0047]

Example 12 100 parts of CR (neoprene WRT, manufactured by Dupont, Showa Denki), 5 parts of bispropyltriethoxysilanetetrasulfide (A-1289, manufactured by Nippon Unicar), 0.5 part of stearic acid, Zinc flower (Zn
O) 5 parts and magnesium oxide (Kyowa Mag # 15)
0, manufactured by Kyowa Chemical Co., Ltd.), 30 parts of acetylene black, and 1 part of Suncellor 22C (manufactured by Sanshin Chemical Co., Ltd.) were mixed and dispersed to prepare a rubber composition as a coating layer forming material. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0048]

Example 13 100 parts of urethane rubber (UN278, manufactured by Sakai Chemical Industry Co., Ltd.), 5 parts of γ-mercaptopropyltrimethoxysilane, 30 parts of acetylene black, 1 part of zinc stearate, and 4 parts of Noxeller DM-P , Powder sulfur 1 part, curacene 1 part, Succinol MP
(Manufactured by Sumitomo Chemical Co., Ltd.) was mixed and dispersed to prepare a rubber composition as a coating layer forming material. Then, the same base rubber layer forming material as in Example 1 was prepared.
A roller was manufactured by the same manufacturing method as that described above.

[0049]

Comparative Example 1 A coating layer forming material was prepared in the same manner as in Example 1 except that no silane coupling agent was added. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0050]

Comparative Example 2 A coating layer forming material was prepared in the same manner as in Example 7 except that no silane coupling agent was added. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0051]

Comparative Example 3 A coating layer forming material was prepared in the same manner as in Example 8 except that no silane coupling agent was added. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0052]

Comparative Example 4 A coating layer forming material was prepared in the same manner as in Example 9 except that no silane coupling agent was added. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0053]

Comparative Example 5 A coating layer forming material was prepared in the same manner as in Example 10 except that no silane coupling agent was added. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0054]

Comparative Example 6 A coating layer forming material was prepared in the same manner as in Example 11 except that no silane coupling agent was added. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0055]

Comparative Example 7 A coating layer forming material was prepared in the same manner as in Example 12 except that no silane coupling agent was added. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

[0056]

Comparative Example 8 A coating layer forming material was prepared in the same manner as in Example 13 except that no silane coupling agent was added. Then, the same base rubber layer forming material as in Example 1 was prepared, and a roller was manufactured by the same manufacturing method as in Example 1.

With respect to each roller thus obtained, the interlayer adhesion between the base rubber layer and the coating layer and the surface hardness of the coating layer were measured and evaluated according to the following methods. The results are shown in Tables 1 to 3 below.

[Interlayer adhesive strength] As shown in FIG.
A 2.5 cm wide cut shown by a broken line X is made along the outer periphery of the coating layer 3 of the roller, and a cut (broken line Y) is made in the core layer direction with respect to the coating layer 3. Then, the coating layer 3 was slightly peeled therefrom, and as shown in FIG. 3 (b), the end of the peeled coating layer 3 was vertically pulled up by an AGS autograph (manufactured by Shima Corporation) (in the direction of arrow Z). ),
The tensile strength was measured. And the tensile strength is 3N
The above items were indicated by ○, those of 1N or more and less than 3N, and those of less than 1N were indicated by ×.

[Surface Hardness] The surface hardness of the coating layer 3 formed on the roller was measured and evaluated using a micro rubber hardness meter MD-1 (manufactured by Kobunshi Keiki Co., Ltd.). That is,
◎: when MD-1 is less than 45 °, ○: when 45 ° or more and less than 47 °, Δ: when 47 ° or more and less than 49 °
° or more was indicated as ×.

[0060]

[Table 1]

[0061]

[Table 2]

[0062]

[Table 3]

From the results shown in Tables 1 to 3, all of the products of Examples have excellent interlayer adhesion between the base rubber layer 2 and the coating layer 3 and the surface hardness of the coating layer 3 is good. You can see that there is. On the other hand, it can be seen that the comparative example product is inferior in the evaluation of either the interlayer adhesive strength or the surface hardness.

[0064]

As described above, the roller for OA equipment of the present invention has a specific rubber material (A) and a specific silane coupling agent on the activated surface of the base rubber layer mainly composed of silicone rubber. A coating layer made of a rubber composition containing (B) is formed and configured. That is, in the present invention, the activated surface of the base rubber layer and the coating layer are firmly integrated by the chemical action of the specific silane coupling agent (B). Even without applying an adhesive to the chemically treated surface, peeling, tearing, and the like of the coating layer can be prevented. Further, since the step of applying the adhesive is not required, the step can be omitted.

Particularly, the silane coupling agent of the above (B) is γ-mercaptopropyltrimethoxysilane,
(Methacryloxypropyl) trimethoxysilane, vinyltris (β-methoxyethoxy) silane, γ-glycidyloxypropyltrimethoxysilane, N-β (aminoethyl) γ-aminopropyltrimethoxysilane, γ-
Aminopropyltriethoxysilane, N-phenyl-γ
-When at least one member selected from the group consisting of aminopropyltrimethoxysilane, bispropyltriethoxysilane tetrasulfide, and propyltriethoxysilane isocyanate, the coating layer is more firmly bonded to the base rubber layer. Therefore, it becomes particularly suitable as a roller for OA equipment.

As the rubber material (A), NBR is used.
When is used, a coating layer having a lower hardness can be obtained than when hydrogenated acrylonitrile-butadiene rubber is used, so that it is particularly suitable as a roller for OA equipment.

When the roller for OA equipment of the present invention is incorporated in, for example, an electrophotographic copying machine as a developing roller, deterioration in image quality is prevented, and a high-quality copied image is obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a roller for OA equipment of the present invention.

FIG. 2 is an explanatory view showing a method for manufacturing a roller for OA equipment of the present invention.

FIG. 3A is a side view of a roller, and FIG. 3B is a schematic diagram for explaining a method for measuring an interlayer adhesion of a coating layer of the roller.

[Explanation of symbols]

 1 Shaft 2 Base rubber layer 3 Coating layer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03G 15/16 103 G03G 15/16 103 3F343 15/20 103 15/20 103 3J103 21/06 C08L 83:04 4F006 // C08L 83:04 G03G 21/00 340 (72) Inventor Hitoshi Yoshikawa 3-3-1 Higashi Komaki, Aichi Prefecture Inside Tokai Rubber Industries Co., Ltd. (72) Shoji Arimura 1-1 3-Higashi Higashi Komaki City, Aichi Prefecture F-term (reference) in Tokai Rubber Industries Co., Ltd. AB05 AB67 CA08 DA04

Claims (3)

[Claims] 1. A base rubber layer having silicone rubber as a main component and having an outer peripheral surface activated is formed on an outer periphery of a shaft body, and a coating layer is formed on an outer peripheral surface of the base rubber layer. A roller for OA equipment, wherein the coating layer is
A roller for OA equipment, which is formed of a rubber composition containing the following (A) and (B). (A) Rubber material (excluding fluororubber and hydrogenated acrylonitrile-butadiene rubber). (B) A silane coupling agent represented by any one of the following general formulas (1) and (2). Embedded image Y ¹ -C ₃ H ₆ Si (OC _n H _{2n + 1} ) ₃ (1) wherein Y ¹ is a vinyl group, a glycidoxy group, a mercapto group, an amino group, an epoxy group, an isocyanate group , A methacryl group or other substituents containing these functional groups. N is 1 or 2. Embedded image Y ² —Si (OC ₂ H ₄ OCH ₃ ) ₃ (2) wherein Y ² is a vinyl group. ] 2. The silane coupling agent of the above (B),
γ-mercaptopropyltrimethoxysilane, γ- (methacryloxypropyl) trimethoxysilane, vinyltris (βmethoxyethoxy) silane, γ-glycidyloxypropyltrimethoxysilane, N-β (aminoethyl) γ-aminopropyltrimethoxysilane And at least one selected from the group consisting of γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, bispropyltriethoxysilane tetrasulfide, and propyltriethoxysilane isocyanate. Roller for OA equipment. 3. The method according to claim 1, wherein the rubber material (A) is acrylonitrile-butadiene rubber.
Roller for A equipment.