JP2014089382A - Oa equipment roller and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an OA equipment roller having excellent applicability to high-speed printing, and a manufacturing method thereof.SOLUTION: The OA equipment roller includes: a cylindrical core body; and an outermost layer laminated on a peripheral surface side of the core body. A main component of the outermost layer is fluororesin. The fluororesin of the outermost layer is crosslinked and chemically bonded with a material for an inner layer. A formation material of the core body is preferably a heat resistant resin. The fluororesin of the outermost layer is preferably tetrafluoroethylene-perfluoro alkyl vinyl ether copolymer (PFA) or poly-tetrafluoroethylene (PTFE). The outermost layer preferably includes PFA and PTFE, and the mass ratio of the PFA and the PTFE is preferably 99:1 or larger and 50:50 or smaller.

Description

  The present invention relates to a roller for office automation equipment and a method for manufacturing the same.

  In an image forming apparatus such as a copying machine or a laser beam printer, a thermal fixing method is generally employed at the final stage of printing and copying. This thermal fixing system heats and melts unfixed toner by passing an object to be transferred, such as printing paper onto which a toner image is transferred, between a fixing roller and a pressure roller provided with a heating source. In this method, toner is fixed on a transfer object to form an image.

  As the fixing roller, one having a structure in which the outermost layer is formed directly or via another layer on the outer peripheral surface of a cylindrical core body made of synthetic resin, metal, or the like is generally used. In such a fixing roller, it is necessary to prevent the so-called offset, in which the toner remains on the fixing roller and double transfer is performed, and to fix the toner satisfactorily. Therefore, a fluororesin having high releasability is used for the outermost layer of the fixing roller. As this fluororesin, polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (EFP), or the like is used. The outermost layer is usually formed by applying a dispersion (paint) containing these fluororesins to the core directly or through another layer and baking.

  In recent years, as the printing or copying function of an image forming apparatus has increased in speed, the quality standard such as releasability required for a fixing roller has been increased. To cope with this, PTFE is inexpensive but has a low molecular weight. A fixing roller using a coating material in which PFA is mixed with PTFE, which is more excellent in releasability, has been devised (Japanese Patent Laid-Open No. 10-142990).

Japanese Patent Laid-Open No. 10-142990

  However, fluororesins have low abrasion resistance due to weak bonding force between fluorine atoms, and low peel strength (adhesion) with the inner layer due to low surface energy, so high-speed printing There is room for improvement in tolerance. Therefore, there is a demand for rollers for office automation equipment such as a fixing roller, a pressure roller, and a developing roller that have applicability to high-speed printing with these characteristics enhanced.

  This invention is made | formed based on the above situations, and it aims at providing the roller for OA equipment excellent in abrasion resistance and peeling strength, and its manufacturing method.

The invention made to solve the above problems is
A roller for OA equipment comprising a cylindrical core body and an outermost layer laminated on the peripheral surface side of the core body, the main component of the outermost layer being a fluororesin;
The outermost layer fluororesin is cross-linked and chemically bonded to the inner layer material.

  The roller for OA equipment is excellent in wear resistance because the fluororesin constituting the outermost layer is crosslinked. Moreover, since this fluororesin is chemically bonded to the material of the inner layer, the adhesion between the outermost layer and the inner layer such as the core is improved, and the peel strength is also excellent. As a result, the OA equipment roller has high applicability for high-speed printing. The OA equipment roller means a roller used in OA equipment such as a fixing roller, a pressure roller, and a developing roller.

  The material for forming the core is preferably a heat resistant resin. Thus, by using a heat-resistant resin as the core body forming material, the core body of the OA equipment roller can be easily molded. Further, when the outermost layer is laminated directly on the peripheral surface of the core body, the chemical bond with the fluororesin becomes stronger, and the peel strength of the outermost layer can be further increased.

  The outermost fluororesin may be tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) or polytetrafluoroethylene (PTFE). By using PFA having a small molecular weight for the outermost layer, the unevenness of the outermost layer can be reduced to improve the releasability. Moreover, the cost of the roller for OA equipment can be reduced by using inexpensive PTFE for the outermost layer.

  The outermost layer preferably contains a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) and polytetrafluoroethylene (PTFE), and the tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) and polytetrafluoro As mass ratio with ethylene (PTFE), 99: 1 or more and 50:50 or less are preferable. In this way, by using a fluororesin in which PFA and PTFE are mixed in the above mass ratio in the outermost layer, PTFE works like a crystal nucleating agent, and the crystallinity of PFA is increased. It can be improved further.

Moreover, another invention made in order to solve the said subject is:
A manufacturing method of a roller for OA equipment comprising a cylindrical core body and an outermost layer laminated on the peripheral surface side of the core body, the main component of the outermost layer being a fluororesin,
A step of laminating an outermost layer mainly composed of a fluororesin on the peripheral surface side of the core;
And irradiating with ionizing radiation in a molten state of oxygen-free and fluororesin.

  According to the above manufacturing method, since the outermost layer is irradiated with ionizing radiation in the molten state of oxygen-free and fluororesin, the fluororesin is crosslinked and chemically bonded to the material of the inner layer. As a result, it is possible to obtain an OA equipment roller having high wear resistance and high peel strength.

  The irradiation dose of the ionizing radiation is preferably 1 kGy or more and 1000 kGy or less. Thus, by setting the irradiation dose of ionizing radiation within the above range, crosslinking and chemical bonding of the fluororesin can be easily and reliably promoted.

  Here, the “columnar shape” is a concept including a so-called cylindrical shape having a hollow. “Anoxic state” refers to a state where the oxygen concentration is 1000 ppm or less.

  As described above, the OA equipment roller of the present invention has high applicability to high-speed printing.

FIG. 1 is a schematic cross-sectional view showing a roller for office automation equipment according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view showing a roller for OA equipment according to an embodiment different from the embodiment of FIG. FIG. 3 is a schematic cross-sectional view showing an OA equipment roller according to an embodiment different from the embodiment of FIGS. 1 and 2.

  Hereinafter, an embodiment of a roller for office automation equipment according to the present invention will be described in detail with reference to the drawings.

[First embodiment]
The OA equipment roller 1 of FIG. 1 includes a cylindrical core body 2 and a cylindrical outermost layer 3 laminated on the outer peripheral surface of the core body 2.

<Core>
The core body 2 accommodates a heater (not shown) for heating. The inner diameter of the core body 2 is not particularly limited as long as it can accommodate a heater, and can be, for example, 10 mm or more and 40 mm or less. Further, the average thickness of the core body 2 is not particularly limited as long as sufficient strength can be maintained, and may be, for example, 10 μm or more and 100 μm or less.

  As a material of the core body 2, heat resistant resin such as polyimide and polyamide, steel such as iron and stainless steel, metal such as aluminum and aluminum alloy, and the like can be used. Among these, a heat resistant resin excellent in moldability is preferable, and a polyimide excellent in heat resistance and strength is particularly preferable. When heat-resistant resin is used as a material for forming the core body 2, for example, a cylindrical core body is formed by applying a resin to the outer peripheral surface of a drum-shaped mold, heating the mold while rotating, and releasing the mold. 2 can be formed easily and reliably.

<Outermost layer>
The outermost layer 3 is mainly composed of a fluororesin, and is laminated on the outer peripheral surface of the core body 2. The outermost layer 3 is a layer whose outer peripheral surface is in contact with the surface of the transferred material on which the toner image is transferred.

  The lower limit of the average thickness of the outermost layer 3 is preferably 1 μm and more preferably 5 μm. On the other hand, the upper limit of the average thickness of the outermost layer 3 is preferably 50 μm, and more preferably 35 μm. When the average thickness of the outermost layer 3 is less than the above lower limit, the elasticity and strength of the OA equipment roller 1 may be insufficient. Conversely, when the average thickness of the outermost layer 3 exceeds the above upper limit, the manufacturing cost increases and the size of the roller 1 for OA equipment may be unnecessarily large.

  Examples of the fluororesin that is the main component of the outermost layer 3 include polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), and tetrafluoroethylene-hexafluoropropylene copolymer (EFP). , Tetrafluoroethylene-hexafluoropropylene copolymer (FEP) and the like, and these can be used alone or in admixture of two or more. Among these, PFA having a low molecular weight and excellent releasability or inexpensive PTFE is preferable, and it is more preferable to use a mixture thereof.

  When the outermost layer 3 contains PFA and PTFE, the mass ratio of the PFA and PTFE is preferably 99: 1 or more and 50:50 or less, and particularly preferably 80:20 or more and 60:40 or less. By making the mass ratio of PFA and PTFE within the above range, PTFE works like a crystal nucleating agent, and increases the crystallinity of PFA and improves the releasability and wear resistance of the outermost layer 3. it can. When the mass ratio of PFA and PTFE is less than the above range (when the mass ratio of PFA exceeds the above range), there is a possibility that the crystallinity of PFA will not be improved, and sufficient releasability and wear resistance may not be obtained. is there. On the contrary, when the mass ratio of PFA and PTFE exceeds the above range (when the mass ratio of PFA is less than the above range), the unevenness of the outer peripheral surface of the outermost layer 3 caused by PTFE becomes large and the fixability of the printed image is deteriorated. There is a risk.

  In the OA equipment roller 1, the fluororesin of the outermost layer 3 is cross-linked. Specifically, the carbon atoms of the main chain of the fluororesin polymer are covalently bonded. In addition, the fluororesin of the outermost layer 3 is chemically bonded to the material of the core body 2 that is the inner layer. Specifically, the carbon atoms in the main chain of the fluororesin polymer and the atoms present on the surface of the core 2 are covalently bonded. As a method of crosslinking the fluororesin of the outermost layer 3 and further chemically bonding with the material of the core body 2, for example, a method of irradiating the outermost layer 3 with ionizing radiation in a molten state of oxygen-free and fluororesin can be used. . This ionizing radiation irradiation method will be described in detail in the description of the manufacturing method of the roller 1 for OA equipment described later.

  In addition to the fluororesin, the outermost layer 3 can be appropriately added with additives such as inorganic fillers such as tin oxide, titanium oxide, and alumina, and conductive fillers such as carbon black and carbon nanotubes.

  Further, the outermost layer 3 may have a multilayer structure including a primer layer and a surface layer. By providing the primer layer in this manner, the adhesion between the core body 2 and the outermost layer 3 can be improved. The types and blends of the fluororesin used for the primer layer and the surface layer may be the same or different, but the fluororesin types and blends are the same in order to improve the adhesion between the two. It is preferable to do.

  The average thickness of the primer layer is not particularly limited, and can be, for example, 1 μm or more and 30 μm or less.

<Method for Manufacturing Roller for OA Equipment>
The OA equipment roller 1 can be easily and reliably manufactured by a manufacturing method having the following steps.
(1) Step of laminating outermost layer 3 mainly composed of fluororesin on outer peripheral surface of core body 2 (2) Step of irradiating ionizing radiation in a molten state of oxygen-free and fluororesin

<(1) Outermost layer lamination process>
In the outermost layer lamination step, first, a coating material in which a material for forming the outermost layer 3 mainly composed of a fluororesin is dispersed or dissolved in a solvent is applied to the outer peripheral surface of the core body 2. As this solvent, a mixed liquid of water and an emulsifier, water and alcohol, water and acetone, water, alcohol, and acetone, which can efficiently disperse the fluororesin, can be used. Next, the core body 2 coated with the paint is placed in a heating furnace and heated to remove the solvent in the paint and to fire the fluororesin. The firing temperature of the fluororesin is about 300 ° C. to 400 ° C. Thereafter, the outermost surface 3 of the core body 2 is cooled to 200 ° C. or lower, preferably 150 ° C. or lower, at a rate of 20 ° C./min or lower to form the outermost layer 3 on the outer peripheral surface of the core body 2. The outermost layer 3 may be formed by first laminating the primer layer on the core body 2 by the above procedure and further laminating the surface layer on the outer peripheral surface of the primer layer by the same procedure.

<(2) Ionizing radiation irradiation process>
In the ionizing radiation irradiation process, the core 2 having the outermost layer 3 laminated is placed in an oxygen-free atmosphere, specifically, an oxygen concentration of 1000 ppm or less, preferably 100 ppm or less, and the outermost layer is maintained while the fluororesin is kept in a molten state. The surface of 3 is irradiated with ionizing radiation, the fluororesin is crosslinked, and further chemically bonded to the core 2.

  The oxygen-free atmosphere is more preferably an oxygen concentration of 100 ppm or less. If the oxygen concentration is high, the main chain of the fluororesin may be broken by irradiation with ionizing radiation. The temperature at which the fluororesin is melted is preferably a temperature that is 0 ° C. or more and less than 30 ° C. higher than the melting point of the fluororesin. When the fluororesin is heated to a temperature higher than the melting point by 30 ° C. or more, the thermal decomposition of the fluororesin is promoted and the material properties may be deteriorated.

  As said ionizing radiation, a gamma ray, an electron beam, an X-ray, a neutron beam, a high energy ion beam etc. can be used, for example. Further, the irradiation dose of ionizing radiation is preferably 1 kGy or more and 1000 kGy or less, and more preferably 50 kGy or more and 500 kGy or less. When the irradiation dose is less than the above lower limit, the crosslinking reaction of the fluororesin may not proceed sufficiently. On the other hand, when the above upper limit is exceeded, the fluororesin may be easily decomposed.

<Advantages of OA equipment rollers>
The roller 1 for OA equipment is excellent in wear resistance because the fluororesin constituting the outermost layer 3 is cross-linked by irradiation with ionizing radiation in a molten state of oxygen-free and fluororesin. In addition, since the fluororesin is chemically bonded to the material of the core body 2 by the irradiation of the ionizing radiation, the OA equipment roller 1 improves the adhesion between the outermost layer 3 and the core body 2 and increases the peel strength. Also excellent. As a result, the roller 1 for OA equipment has high applicability to high-speed printing and can increase the number of printable sheets (lifetime).

[Second Embodiment]
The OA equipment roller 11 according to the second embodiment shown in FIG. 2 includes a cylindrical core body 2, a cylindrical intermediate layer 4 laminated on the outer peripheral surface side of the core body 2, and an outer periphery of the intermediate layer 4. And a cylindrical outermost layer 3 laminated on the surface. An adhesive layer 5 is laminated between the core body 2 and the intermediate layer 4. Since the core body 2 and the outermost layer 3 are the same as those of the OA equipment roller 1 of the first embodiment, the same reference numerals are given and the description thereof is omitted. However, in the OA equipment roller 11, the carbon atoms of the main chain of the fluororesin polymer of the outermost layer 3 and the atoms present on the surface of the intermediate layer 4 are covalently bonded.

<Intermediate layer>
The intermediate layer 4 is laminated on the outer peripheral surface side of the core body 2 via an adhesive layer 5 described later, and is made of an elastic material. The intermediate layer 4 can increase the elasticity of the OA equipment roller 11 and improve the toner fixing property.

  The lower limit of the average thickness of the intermediate layer 4 is preferably 20 μm and more preferably 100 μm. On the other hand, the upper limit of the average thickness of the intermediate layer 4 is preferably 2 mm, and more preferably 500 μm. When the average thickness of the intermediate layer 4 is less than the above lower limit, the effect of improving the elasticity of the OA equipment roller 11 may be insufficient. On the other hand, when the average thickness of the intermediate layer 4 exceeds the above upper limit, the manufacturing cost increases and the size of the roller 11 for OA equipment may be unnecessarily large.

  The material of the intermediate layer 4 is not particularly limited as long as it has elasticity and heat resistance. For example, silicon rubber such as dimethyl silicone rubber, fluoro silicone rubber, methyl phenyl silicone rubber, vinyl silicone rubber, or fluoro rubber is used. be able to. Further, an additive such as a heat conductive filler may be included in the forming material of the intermediate layer 4.

<Adhesive layer 5>
The adhesive layer 5 is a layer that is formed from an adhesive layered on the outer peripheral surface of the core body 2 and adheres the intermediate layer 4 to the core body 2. The adhesive that forms the adhesive layer 5 is not particularly limited as long as it can adhere the intermediate layer 4 and the core body 2.

  The lower limit of the average thickness of the adhesive layer 5 is preferably 0.5 μm, and more preferably 1 μm. On the other hand, the upper limit of the average thickness of the adhesive layer 5 is preferably 20 μm and more preferably 5 μm. When the average thickness of the adhesive layer 5 is less than the above lower limit or exceeds the above upper limit, the adhesive strength between the intermediate layer 4 and the core body 2 may be insufficient.

<Method for Manufacturing Roller for OA Equipment>
The OA equipment roller 11 can be easily and reliably manufactured by a manufacturing method having the following steps.
(1 ′) Step of laminating the intermediate layer 4 on the outer peripheral surface of the core body 2 (2 ′) Laminating the outermost layer 3 mainly composed of fluororesin on the outer peripheral surface side (the outer peripheral surface of the intermediate layer 4) of the core body 2 (3 ') The process of irradiating with ionizing radiation in the molten state of oxygen-free and fluororesin

<(1 ′) Intermediate Layer Lamination Step>
In the intermediate layer stacking step, first, an adhesive is applied to the outer peripheral surface of the core body 2 to form the adhesive layer 5. Next, while the core body 2 is rotated in the circumferential direction, the material for forming the intermediate layer 4 is supplied along the axial direction to the outer peripheral surface of the adhesive layer 5 to form the intermediate layer 4. By coating the forming material of the intermediate layer 4 while rotating the core body 2 in this way, a coating layer having no irregularities on the surface can be formed by centrifugal force.

<(2 ′) Outermost layer lamination process>
The outermost layer laminating step is the roller for office automation equipment according to the first embodiment, except that a coating material in which a material for forming the outermost layer 3 mainly composed of a fluororesin is dissolved in a solvent is applied to the outer peripheral surface of the intermediate layer 4. This is the same as the outermost layer stacking step in the manufacturing method 1.

<(3 ') Ionizing radiation irradiation process>
The ionizing radiation irradiation step is the same as the ionizing radiation irradiation step in the method for manufacturing the roller 1 for OA equipment of the first embodiment.

<Advantages of OA equipment rollers>
The roller 11 for OA equipment is excellent in wear resistance because the fluororesin constituting the outermost layer 3 is cross-linked by ionizing radiation irradiation in a molten state of oxygen-free and fluororesin. In addition, since the fluororesin is chemically bonded to the material of the intermediate layer 4 by the irradiation of this ionizing radiation, the OA equipment roller 11 improves the adhesion between the outermost layer 3 and the intermediate layer 4 and increases the peel strength. Also excellent. As a result, the OA equipment roller 11 has high applicability for high-speed printing. In particular, since the intermediate layer 4 contains rubber as a main component, chemical bonding with a fluororesin is easily performed, and the outermost layer 3 exhibits higher peel strength. In addition, since the fluororesin becomes soft due to cross-linking, the OA equipment roller 11 has higher fixability in combination with the elasticity of the intermediate layer 4.

[Third embodiment]
The OA equipment roller 21 of the third embodiment shown in FIG. 3 includes a columnar core body 22, a cylindrical intermediate layer 4 laminated on the outer peripheral surface side of the core body 22, and an outer periphery of the intermediate layer 4. And a cylindrical outermost layer 3 laminated on the surface. An adhesive layer 5 is laminated between the core body 22 and the intermediate layer 4. The outermost layer 3 is the same as that of the OA equipment roller 1 of the first embodiment, and the intermediate layer 4 and the adhesive layer 5 are the same as those of the OA equipment roller 11 of the second embodiment. The same reference numerals are given and the description is omitted. The core body 22 has a solid cylindrical shape, and the same material as that of the core body 2 of the OA equipment roller 1 of the first embodiment can be used.

  The OA equipment roller 21 includes the OA equipment roller 21 and a cylindrical roller that contacts and is driven by the OA equipment roller 21 and has a heater inside. It can be suitably used for an image forming apparatus of a type in which the toner on the transfer object is fixed by the heated roller 21 for OA equipment. The roller for office automation equipment 21 crosslinks the fluororesin constituting the outermost layer 3 by ionizing radiation irradiation in a molten state of oxygen-free and fluororesin, and further chemically bonds with the material of the intermediate layer 4. High applicability to printing.

[Other Embodiments]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is not limited to the configuration of the embodiment described above, but is defined by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims. The

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to the following examples.

[Fixing roll A]
On the outer peripheral surface of a cylindrical cylindrical core made of polyimide, a forming material mainly composed of a fluororesin in which PFA and PTFE are mixed at a mass ratio of 70:30 is applied, and heated at 350 to 400 ° C. for 20 minutes. Thus, the outermost layer was formed, and the fixing roll A was manufactured. The outermost layer had a two-layer structure consisting of a primer layer and a surface layer of the same material, and the average thickness was 15 μm (primer layer 5 μm, surface layer 10 μm). The average thickness of the core was 55 μm.

[Fixing roll B]
A fixing roll B was produced under the same conditions as the fixing roll A, except that only PFA was used as the main fluororesin of the outermost layer.

[Example 1]
The fixing roll A was irradiated with a 300 kGy electron beam (acceleration voltage 1.13 MeV) under the conditions of an oxygen concentration of 5 ppm and 340 ° C. to obtain the fixing roll of Example 1.

[Example 2]
The fixing roll B was irradiated with an electron beam under the same conditions as in Example 1 to obtain the fixing roll of Example 2.

[Comparative Example 1]
The fixing roll A was used as it was to obtain a fixing roll of Comparative Example 1.

[Comparative Example 2]
The fixing roll B was used as it was to obtain a fixing roll of Comparative Example 2.

  The amount of wear was measured for each OA machine roller of Examples 1 and 2 and Comparative Examples 1 and 2. The results are shown in Table 1. The amount of wear is a value measured by the following method.

[Abrasion amount (unit: μm)]
The roller for OA equipment was cut along the axial direction, developed into a flat plate shape, and fixed horizontally on the table so that the outermost layer was on the surface. A scotch bright (# 3000) is placed on the surface of the plate-shaped OA equipment roller, a weight of 2 kg and a diameter of 50 mm is placed on the scotch bright, the weight is rotated at 200 rpm, and a constant rotational speed ( The thickness of the roller for OA equipment was measured every 50,000 revolutions), and the amount of decrease (wear) in the outermost layer was calculated. In addition, the thickness of the roller for OA equipment measured thickness at four points equidistantly arranged on the circumference where the outer edge of a weight contacts, and used the average value.

  As shown from the results in Table 1, the wear amount of the rollers for OA equipment of Examples 1 and 2 is reduced to about 1/10 compared to the rollers for OA equipment of Comparative Examples 1 and 2. Therefore, it is estimated that the OA machine rollers of Examples 1 and 2 can double the number of printable sheets compared to the conventional OA machine rollers (Comparative Examples 1 and 2 OA machine rollers). The

  As described above, the roller for OA equipment of the present invention can be suitably used for a high-speed image forming apparatus.

DESCRIPTION OF SYMBOLS 1, 11, 21 OA equipment roller 2, 22 Core body 3 Outermost layer 4 Intermediate layer 5 Adhesive layer

Claims (6)

A roller for OA equipment comprising a cylindrical core body and an outermost layer laminated on the peripheral surface side of the core body, the main component of the outermost layer being a fluororesin;
A roller for office automation equipment, wherein the outermost fluororesin is crosslinked and chemically bonded to the material of the inner layer.   The roller for office automation equipment according to claim 1, wherein a material for forming the core is a heat-resistant resin.   The roller for office automation equipment according to claim 1 or 2, wherein the fluororesin of the outermost layer is tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) or polytetrafluoroethylene (PTFE). The outermost layer contains tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) and polytetrafluoroethylene (PTFE),
The roller for office automation equipment according to claim 3, wherein the mass ratio of the tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) to the polytetrafluoroethylene (PTFE) is 99: 1 to 50:50. A manufacturing method of a roller for OA equipment comprising a cylindrical core body and an outermost layer laminated on the peripheral surface side of the core body, the main component of the outermost layer being a fluororesin,
A step of laminating an outermost layer mainly composed of a fluororesin on the peripheral surface side of the core;
And irradiating with ionizing radiation in a molten state of oxygen-free and fluororesin.   The method for producing a roller for OA equipment according to claim 5, wherein an irradiation dose of the ionizing radiation is 1 kGy or more and 1000 kGy or less.

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