JP2003326215A - Method for manufacturing oil coated member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil coated member intermediate structure obtained by forming a layer for finely controlling a coating quantity and containing fine pores and an adhesive layer between an oil holding layer and a porous film layer, or the like, on the outside of the porous film layer without leaving silicon oil in the fine pores, in a manufacturing method for the oil coated member having the oil holding layer containing and holding releasing oil and the porous film layer formed on the oil holding layer and for controlling the oil coating quantity as essential structural elements, and the manufacturing method of the oil coated member formed by impregnating the oil coated member intermediate structure with oil. <P>SOLUTION: The coating material finely controlling layer and the adhesive layer between the oil holding layer and the porous film layer, or the like, are formed by applying a mixed coating agent or a mixed adhesive agent containing a curable silicon composition with a volatile hydrocarbon on the surface of the porous film layer, curing the curable silicon composition, and next, volatilizing the volatile hydrocarbon to form the coating quantity finely controlling layer and the adhesive layer. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can arbitrarily select a release oil to be applied to a fixing roll in a toner fixing section of an electronic copying machine or an electronic printing machine, and finely adjust the amount of the release oil applied. The present invention relates to an oil applying member that can be applied uniformly.

[Prior art]

Conventionally, in order to prevent toner from adhering to the heat roll of the toner fixing section of an electronic copying machine or an electronic printing machine, to prevent paper wrapping, or to prevent abrasion of the heat roll surface, the heat roll surface is continuously separated. A release oil application member for applying the mold oil is used.

In particular, with the recent practical use of color laser printers, four layers of a plurality of color toners, for example, three primary colors of red, blue, yellow and black toner are laminated on the printing surface. Therefore, in order to form a high-quality image, it is necessary to constantly apply an appropriate amount of release oil without spots.

The amount of release oil applied is usually 0.5 to
Several mg / A4 version, but depending on the application 0.2 mg /
It may be required to be A4 or smaller. The coating amount of the release oil has conventionally been controlled by a porous polytetrafluoroethylene film, that is, a PTFE film in order to adjust the coating amount. However, a porous film having a fine pore size enough to control a minute coating amount is manufactured. Therefore, it is difficult to control the minute coating amount of the release oil by further coating the surface of the porous film with a treatment agent to form a coating amount fine adjustment layer containing fine pores. Has been done.

Regarding the above-mentioned method for controlling the minute coating amount, for example, Japanese Patent Publication No. 6-73051 "Oil coating mechanism for copying machines" discloses porous polytetrafluoroethylene with respect to the surface of a thick porous tissue material. There is disclosed a coating mechanism in which an oil permeation control layer is formed by impregnating the void structure with a mixture of silicone rubber and release oil and then crosslinking the mixture.

By the way, as the releasing oil, generally, different kinds of silicone oils are used properly for various purposes, but the above-mentioned Japanese Patent Publication No. 6-730.
In the oil permeation amount control layer of the oil application mechanism for a copying machine described in JP-A-51, the silicone oil used during manufacturing remained even after the control layer was completed, and the remaining place was impregnated in the oil retaining layer. Since it is also a passage for release oil, that is, silicone oil, both silicone oils are mixed.

In the above mixing, if the viscosities are greatly different from each other, the amount of secretion from the surface layer, that is, the coating amount is abnormally changed due to the mixing of the viscosities different from each other, which may cause variations in the performance of the coating member. Become. In order to avoid this, it takes a long time to consume the above-mentioned mixed portion of oil in advance. In order to avoid the problem due to such mixing, it is unavoidable to use the same silicone oil as the above releasing oil. Therefore, the above-mentioned application mechanism needs to be separately produced for each type of release oil to be applied, and it is not possible to enjoy production efficiency as mass production.

In the above case, if the viscosity of the releasing oil for practical use is high, the viscosity of the coating agent for forming the oil permeation amount control layer becomes high, so that the coating agent has a void structure of porous polytetrafluoroethylene. Difficult to penetrate, resulting in a longer processing time and reduced workability in the coating layer forming step.

When manufacturing the coating mechanism described in Japanese Patent Publication No. 6-73051, RTV rubber (room temperature curable rubber), LTV rubber (constant temperature curable rubber), ultraviolet curable rubber, etc. are used as silicone rubber. Is used, but when the silicone rubber used undergoes an addition reaction with a platinum catalyst and the release oil has an amino group, it acts as a catalyst poison for the platinum catalyst, which slows the curing speed, In addition, the curing becomes uneven.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to solve the above problems, that is, as main constituent elements, In a method for producing an oil coating member having an oil holding layer containing release oil and holding it, and a porous membrane layer for controlling the oil coating amount on the surface thereof, further finely adjusting the coating amount outside the porous membrane layer. Provided is a method for producing an oil-applying member intermediate structure and an oil-applying member impregnated with the oil, wherein a coating amount fine-adjusting layer containing fine pores is formed so that silicone oil does not remain in the fine pores. Especially.

[0011]

Means for Solving the Problems As a result of various studies to achieve the above object, the present inventor has found that a curable silicone composition and a volatile hydrocarbon are contained in order to form a coating amount fine adjustment layer. It has been found that the above problems can be overcome by applying a mixed coating agent and curing a curable silicone composition, and then volatilizing and removing the volatile substance, and thus the present invention has been achieved. is there.

That is, the first gist of the present invention is, as main components, an oil holding layer containing and holding a release oil, and a porous membrane layer for controlling the amount of oil applied to the surface thereof.
In the method for producing an oil application member having a coating amount fine adjusting layer for finely adjusting the coating amount thereon, mixed coating containing a curable silicone composition and a volatile hydrocarbon from the surface side of the porous membrane layer. After the agent is applied to impregnate the void structure of the porous film, the curable silicone composition is cured, and then the volatile hydrocarbon is volatilized to form a coating amount fine adjustment layer. The present invention resides in a method for producing a characteristic oil application member, and an intermediate structure that can be produced by the above-described production method.

A second aspect of the present invention is, as main components, an oil retaining layer containing and retaining a releasing oil, a porous membrane layer controlling an oil coating amount, and, if necessary, between the both layers. In a method for producing an oil application member having a porous oil transfer layer, a mixed adhesive containing a curable silicone composition for adhesion and a volatile hydrocarbon is provided between any two adjacent layers of these layers. The method for producing an oil-applied member, characterized in that the above-mentioned curable silicone composition is cured by bonding via an adhesive layer and then adhered by an adhesive layer containing fine pores formed by volatilizing the volatile hydrocarbon. And an intermediate structure that can be manufactured by the above manufacturing method.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
The oil application member and the intermediate structure manufactured by the manufacturing method according to the first and second aspects of the present invention have, as basic components, an oil holding layer containing release oil and holding it, and an oil coating on the surface thereof. And a porous membrane layer for controlling the amount.

The shape of the oil retaining layer is a roll having an axis of rotation, a U-shaped curve so that the porous film and the coating amount fine adjustment layer are on the outside, and other fine adjustment of the coating amount. Mention may be made of any shape that is bent so that the layers are on the outside.

The constituent material of the oil retaining layer is not particularly limited, and examples thereof include paper, sponge, felt, and ceramics. For the fixing roll of the toner fixing section of an electronic copying machine or an electronic printing machine. When it is used as a release oil coating roll, it is preferable that the roll has excellent heat resistance, and among these, a roll made of porous ceramics as the main component is preferable.

The above-mentioned porous ceramics are usually silica fibers, silica alumina fibers, alumina fibers, ceramic fibers such as glass fibers, silica particles, silica alumina particles, alumina particles, ceramic particles such as glass particles, and silica sol. In addition to an inorganic binder such as alumina sol, if necessary, further, organic fibers, organic particles, and an organic binder are added to water, kneaded, molded, dried, and the organic matter contained is baked and baked. It is preferable to use a material containing a large amount of a porous structure inside the integrated inorganic binder obtained by heat fusion.

The above-mentioned porous ceramics have pores having a diameter of approximately 10 to 100 μm corresponding to inter-fiber voids, and diameters of 200 to 2 formed by volatilization of organic resin particles.
It has large pores of 000 μm. The large pores play a role of storing oil, and the inter-fiber voids play a role of moving the oil by its capillary force.

The above-mentioned porous membrane layer having a function of controlling the amount of oil applied is a layer for adjusting the amount of oil permeated from the oil retaining layer, and such a porous membrane is usually a porous fluororesin. When a film is used, and particularly when used as a fixing roll of a toner fixing section, a polytetrafluoroethylene film (hereinafter referred to as PTFE) having excellent releasability for toner.
A porous film) is preferably used.

The above-mentioned porous film has, for example, a thickness of 15 to 130 μm, preferably 30 to 60 μm, a large number of openings having a diameter of 0.1 to 2 μm, and a surface roughness Ra of 0. Those having a porosity of 0.5 to 2 mm, a porosity of 60 to 90%, and an air permeability of 3 to 1500 seconds as a Gurley number measured by a B-type Gurley type densometer are preferably used.

If desired, a porous oil transfer layer can be provided between the oil retaining layer and the porous membrane layer. The oil transfer layer has a role of sucking oil from the oil retaining layer and transferring it to the porous membrane layer. The oil transfer layer may have a multi-layer structure.

Examples of the oil transfer layer include a heat-resistant fiber felt such as aramid fiber.
Among them, those molded into a sheet shape by needle punching or the like are more preferable. The oil transfer layer has a basis weight of 60-
1000 g / m ² , preferably 170-800 g / m ² ,
Those having a thickness of 0.5 to 5 mm, preferably 2 to 3 mm are preferably used.

Between any two adjacent layers among the oil retaining layer, the oil transfer layer and the porous membrane layer, for example, a method of using a fixing component, a method of using an adhesive and other methods, or those It can be laminated and fixed by a method of combining. Above all, a method using an adhesive is preferable for laminating the oil transfer layer and the porous film on each other from the viewpoint of uniformity of oil exudation on the surface.

The fixing method using the above-mentioned adhesive is not particularly limited as long as it does not completely cover the adhesive surface with the adhesive, and one example thereof is RT on one surface of the adhesive.
V rubber (room temperature curable rubber), LTV rubber (low temperature curable rubber), a method of applying an adhesive containing UV curable rubber as a main component in a dot shape or a lattice shape and partially adhering it, and A method of bonding with an adhesive layer containing fine pores can be mentioned.

As a method for adhering with the above-mentioned adhesive layer containing fine pores, for example, bonding is performed through a mixed adhesive containing a curable silicone composition and a volatile hydrocarbon, and the curable silicone composition is cured. After making the adhesive layer,
There is a method of volatilizing the volatile hydrocarbon to form the adhesive layer so as to include fine pores.

Specific examples of the curable silicone composition include silicone varnish and liquid silicone rubber composition. All of the above curable silicone compositions exhibit adhesiveness, have excellent heat resistance after reaction curing, and form a silicone-based film, which is coated with release oil by the coating member of the present invention. When applied, it has a high affinity with this release oil,
It can be used preferably.

The above-mentioned silicone varnish is usually 3-4.
Unreacted silicone containing a functional group component is dissolved in a solvent such as xylene or toluene. In addition, the above liquid silicone rubber composition is a linear polydimethylsiloxane or a copolymer thereof, and a reaction initiator such as an organic peroxide and / or an organic salt such as tin or lead, or a platinum catalyst, which is suitable for each of them. The reaction catalyst such as is added. As a specific example, Shin-Etsu Chemical Co., Ltd. “KR
-105 ".

The above liquid silicone rubber composition is a product which produces a substance exhibiting rubber elasticity by adding a reaction catalyst or a crosslinking agent to linear polydimethylsiloxane or its copolymer. A specific example is "KR-2025" manufactured by Shin-Etsu Chemical Co., Ltd.

Of the above curable silicone compositions, when used as an adhesive as described above, a silicone varnish is more suitable. At that time, the viscosity is 10 to 20.
20,000 cSt, preferably 100-60,000 c
St is preferable, and it is preferable to adjust the viscosity so that the viscosity when a volatile hydrocarbon described later is added is 10 to 2000 cSt.

As the above volatile hydrocarbon, one which does not react with the above curable silicone composition and is volatilized and removed by curing after curing the above composition by heating or under reduced pressure is selected. Then used. Such a volatile hydrocarbon can be appropriately selected from straight-chain hydrocarbons, side-chain hydrocarbons, cyclic hydrocarbons and derivatives thereof in consideration of the melting point and boiling point.

Among them, for example, C ₉ H _{20 to} C ₁₆ H ₃₄ methane series hydrocarbons have a boiling point of 120 to 300 ° C., so that they are easily volatilized at a relatively low temperature by high temperature treatment or under reduced pressure. It can be removed and is preferably used. More preferred are C ₁₅ H ₃₂ and C ₁₆ H ₃₄ . However, the present invention is not limited to these.

The above hydrocarbon has a molecular weight of C₉H₂₀Than
Crosslinking of curable silicones due to the high volatility of smaller ones
It volatilizes before the reaction is completed, and the molecular weight is C
₁₆H ₃₄The larger ones have melting points above 20 ° C, so
Difficult to mix evenly with curable silicone under temperature
is there.

The mixing ratio of the curable silicone composition and the volatile hydrocarbon in the mixed adhesive is appropriately adjusted according to the target oil permeation amount of the oil application member, and is usually 90:10. It is 20:80 (weight ratio), preferably 70:30 to 50:50 (weight ratio). When the compounding ratio of the curable silicone composition is higher than the above ratio, the ratio of the portion serving as the oil passage is small, and the oil supply ability to the coating amount control layer is reduced. Further, when the mixing ratio of the volatile hydrocarbon is higher than the above ratio, the strength of the formed adhesive layer decreases.

The coating amount of the above mixed adhesive is usually 5
It is 0 to 300 g / m ² . The curable silicone composition component is dried and cured for 5 to 24 hours with both layers bonded. The volatile hydrocarbons in the adhesive layer thus formed are volatilized and removed by curing at a high temperature or at a relatively low temperature under reduced pressure, and the space where the volatile hydrocarbons are present is removed. It becomes fine pores, and the above-mentioned adhesive layer becomes an adhesive layer containing fine pores.

The coating amount fine adjustment layer is coated with a mixed coating agent containing a curable silicone composition and a volatile hydrocarbon from the surface side of the porous membrane to impregnate the void structure of the porous membrane. After that, the curable silicone composition is crosslinked and cured, and then the volatile hydrocarbon is volatilized to form.

As the above-mentioned curable silicone composition,
The materials described in the section of the mixed adhesive used for the adhesive layer containing fine pores, such as the silicone varnish and the liquid silicone rubber composition, can be mentioned. As a material for the coating amount fine adjustment layer constituting the surface layer, a liquid silicone rubber composition is particularly preferable because it forms a film showing rubber elasticity after curing.

As the above-mentioned curable silicone composition,
When using as a material to form the coating amount fine adjustment layer,
Usually, those having a viscosity of 50 to 60,000 cSt are used, and it is preferable to select such that the viscosity of the mixed coating agent to which the volatile hydrocarbon described later is added is 10 to 2000 cSt.

The volatile hydrocarbon is selected from those which are volatilized and removed by curing under heating or under reduced pressure after the coating agent mixed with the curable silicone composition is cured. Such a volatile hydrocarbon can be appropriately selected from those used in the above-mentioned mixed adhesive.

The mixing ratio of the curable silicone composition and the volatile hydrocarbon in the above mixed coating agent is appropriately adjusted according to the desired permeation amount of the oil of the coating member, and is usually 9
0:10 to 20:80 (weight ratio), preferably 70: 3
It is 0 to 50:50 (weight ratio). When the blending ratio of silicone is higher than the above-mentioned ratio, the ratio of the portion serving as the oil passage is small, and the ability to apply oil is reduced. Further, when the mixing ratio of the volatile hydrocarbons is higher than the above ratio, the strength of the coating film formed is low, so that the coating film may peel off during use.

The desired permeation amount of the above-mentioned oil depends on the kind of the oil and the printing speed, but is generally about 0.2 to 15 mg (/ A4 plate area), preferably 0.2 to several. mg (/ A4 plate area), and may be adjusted to 0.2 mg (/ A4 plate area) or less depending on the application.

The above mixed coating agent is sufficiently homogeneously stirred and mixed using a stirrer or the like, and then applied on the surface of the porous film. The coating amount is usually about 15 to 130 g / m ² . The curable silicone in the applied mixed coating agent is aged at a known reaction temperature and time depending on the combination of the reaction initiator and the reaction catalyst added.

After the curable silicone composition is cured, the coating layer is heated under reduced pressure and / or heated according to the volatility of the volatile hydrocarbon used to volatilize and remove the volatile hydrocarbon. The portion where hydrogen was present becomes fine pores, a coating amount fine adjustment layer including a large number of fine pores that does not contain silicone oil is formed, and an oil application member intermediate structure is obtained. The volatile hydrocarbons can be recovered and reused by carrying out the above-mentioned volatilization operation in a closed chamber and cooling the exhaust gas to coagulate.

The above oil applying member intermediate structure is impregnated with oil to form an oil applying member. The method of impregnating such oil is not particularly limited, but is usually carried out by immersing the above intermediate structure in a bath of oil to be impregnated, in which case the immersion bath is placed in a vacuum tank,
After the above structure is housed in a tank and decompressed, the intermediate structure can be efficiently impregnated by immersing it in a bath. As another oil impregnation method, it is possible to use a method in which an oil supply probe having a shape that covers the entire oil retaining layer having an open end surface is pressed against the end surface to inject oil under pressure.

[0044]

EXAMPLES The present invention will be described in more detail with reference to examples below, but the present invention is not limited to the following examples as long as the gist thereof is not exceeded.

Example 1 In this example, in the oil application member, the oil retaining layer was made of ceramics, the shape of which was cylindrical, and the shaft serving as the rotating shaft was attached to the center of the cylinder to form the oil. It is an example of a method for producing an oil application member having the shape of an oil application roll having a felt layer, a porous film layer, and a coating amount fine adjustment layer in this order on the circumferential surface of the holding layer.

50 parts by weight of silica-alumina fiber, 10 parts by weight of silica sol, polyethylene resin 2 having an average diameter of 300 μm
0 parts by mass, 10 parts by mass of an organic binder and 50 parts by mass of water are homogeneously kneaded, and the resulting kneaded product is extruded into a hollow cylinder having a length of 300 mm, a diameter of 33 mm and an inner diameter of 8.0 mm. After drying at 2 ° C. for 2 hours, firing was further performed at 480 ° C. for 8 hours.

In the above-mentioned firing step, water and the organic binder are vaporized and the polyethylene resin particles are burned off, resulting in 3
An oil holding layer having large pores of 00 μm and having a hollow central shaft portion made of a porous ceramic body was obtained.

Outer diameter of 8 m in the hollow hole of the central axis of the holding layer
A shaft of m was attached and fixed to prepare a roll as a rotation axis. A ribbon-like felt having a thickness of 2 mm, a width of 30 mm and a density of 300 g / m ² was spirally wound around the surface of the obtained porous ceramic roll in a spiral shape so that the end faces abut each other, and the winding was started. The RTV silicone rubber was applied and fixed to the part and the end of winding.

Vaporization temperature under atmospheric pressure is 270.5 ° C.
Hydrocarbon C ₁₅ H ₃₂ and silicone composition (manufactured by Shin-Etsu Chemical Co., Ltd., “KR-105”) are mixed at a weight ratio of 3: 7, and a stirrer (hybrid mixer, manufactured by Keyence Corporation) is used. The mixed adhesive, which was stirred for 3 minutes, was applied to the surface of the PTFE film as the porous film at a coating amount of 150 g /
After coating so as to be m ² , the PTFE film and the felt surface were wound in a single layer so as to be in close contact with each other via a mixed adhesive, and a porous film layer was laminated.

Separately, 20 parts by mass of hydrocarbon C ₁₅ H ₃₂ and 80 parts by mass of silicone (“KR-2042”, manufactured by Shin-Etsu Chemical Co., Ltd.) were mixed and stirred and mixed for 3 minutes using a stirrer. A mixed coating agent was prepared. The viscosity of the obtained mixed coating agent was 350 cSt. The above mixed coating agent is applied to the entire surface of the PTFE membrane, which is the porous membrane layer of the roll,
Apply evenly so that the solid content becomes 40 g / m ^2, and
The silicone component was cross-linked and cured by curing for 30 minutes in a thermostat at 0 ° C.

Next, the coating roll was aged in a pressure-reducing tank of 0.01 MPa adjusted to 70 ° C. for 3 hours,
The hydrocarbon C ₁₅ H ₃₂ component contained in the adhesive layer and the coating amount fine adjustment layer was volatilized, and the exhaust gas was condensed by a cooling trap device and recovered. As a result, an oil-coated roll intermediate structure containing no silicone oil in the oil retaining layer, the adhesive layer and the coating amount fine adjustment layer was obtained.

The above coating roll intermediate structure was immersed in a mold release oil (brand name KF-96, manufactured by Shin-Etsu Chemical Co., Ltd.) bath in a vacuum vessel to impregnate the mold release oil, and the resulting oil coating was applied. After the end caps were attached to both end faces of the roll, the end caps were attached in place of the oil coating roll of a commercially available color printer, 5000 normal color papers were printed, and then one OHP paper was passed.

On the way, 500th, 1000th, 200th
The amount of silicone oil applied to the printing paper on the 0th sheet, the 3000th sheet, the 4000th sheet and the 5000th sheet was measured. In addition, a magenta single color image was printed on the above-mentioned OHP paper, and the unevenness of application of the silicone oil was evaluated by the unevenness of the image. The results are shown in Table 1.

Examples 2 to 4 In Example 1, the mixing ratio of the hydrocarbon C ₁₅ H ₃₂ and the addition-reaction crosslinkable silicone as the mixed coating agent for the oil coating amount fine adjustment layer was the same as those in Examples 2 and 2. An oil application roll intermediate structure as an oil application member of the present invention containing no silicone oil was obtained in exactly the same manner as in Example 1 except that 3 and 4 were 50:50, 60:40 and 70:30, respectively. . This oil coating roll intermediate structure was impregnated with oil in the same manner as in Example 1, and the obtained oil coating roll was used to perform a printing test on ordinary color paper, and the silicone oil coated on the printing paper was used. The coating amount of was measured, and peeling and deviation of the oil coating amount fine adjustment layer were visually observed to evaluate the coating unevenness of the silicone oil.
The results are shown in Table 1.

Comparative Examples 1 and 2 In Example 1, the mixing ratio of the hydrocarbon C ₁₅ H ₃₂ and the addition reaction crosslinkable silicone as a mixed coating agent for the oil coating amount fine adjustment layer was compared in terms of mass ratio. An oil-applied roll intermediate structure containing no silicone oil was obtained in exactly the same manner as in Example 1, except that 2 was 95: 5 and 10:90, respectively. This oil coating roll intermediate structure was impregnated with oil in the same manner as in Example 1, and a printing test was performed on a normal color paper using the obtained oil coating roll, and the silicone oil coated on the printing paper was tested. Measure the coating amount, peel off the oil coating fine adjustment layer,
The deviation was visually observed to evaluate the coating spots of the silicone oil. The results are shown in Table 1.

[0056]

[Table 1]

[0057]

According to the present invention described above, a curable silicone composition as a coating agent for forming a coating amount fine adjustment layer on the surface of a porous film and a hydrocarbon or its derivative having low viscosity and excellent volatility. By using a mixed coating agent with
The coating agent can reduce the viscosity, has excellent penetration into the voids in the porous film, and has fine pores in which silicone oil does not remain due to evaporation of hydrocarbons after the curable silicone composition is cured after application. It becomes a coating amount fine adjustment layer containing. Also,
Similarly, a mixed adhesive of a curable silicone composition for adhesion and a hydrocarbon or a derivative thereof having a low viscosity and excellent volatility is provided between any two adjacent layers of the oil retaining layer, the oil transfer layer and the porous membrane. By using it, it becomes the thing adhere | attached by the adhesive layer which does not contain oil and contains a fine pore. Therefore, even if any release oil is used, the oil is not mixed. Further, since methane series hydrocarbons such as C ₁₅ H ₃₂ pentadecane are easily volatilized and have a low boiling point, a recovery device can be installed and the hydrocarbon can be repeatedly used.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a cross-sectional structure of an oil application roll manufactured in Example 1.

[Explanation of symbols]

10 Oil coating roll 11 Coating amount fine adjustment layer 12 Porous membrane layer 13 felt layers 14 Porous ceramic body layer (oil holding member) 15 rotation axis

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shigeru Naka             Nichias 1-8-1 Shintoda, Hamamatsu City, Shizuoka Prefecture             Hamamatsu Laboratory Co., Ltd. F-term (reference) 2H033 AA08 AA32 BA43                 4D075 BB26Z CA07 DA20 DA25                       DB31 DC27 EA07 EB42 EC30                       EC52                 4F040 AA01 AA02 AA05 AB08 BA12                       CB01 CB02 CB21 DA12

Claims (12)

[Claims] 1. An oil retaining layer containing release oil as a main component, a porous membrane layer for controlling an oil coating amount on the surface thereof, and a coating amount fine adjustment for finely adjusting the coating amount thereon. In the method for producing an oil coating member having a layer, a porous coating layer having a void structure formed by coating a mixed coating agent containing a curable silicone composition and a volatile hydrocarbon from the surface side of the porous membrane layer. A method for producing an oil-applied member, characterized in that the curable silicone composition is cured, and then the volatile hydrocarbon is volatilized to form a coating amount fine adjustment layer. 2. The method for producing an oil application member according to claim 1, wherein a porous oil transfer layer is interposed between the oil retaining layer and the porous membrane layer. 3. An oil holding layer containing and holding a release oil, a porous membrane layer for controlling an oil coating amount, and a porous oil transfer layer between the two layers as necessary, as main components. In the method for producing an oil-applied member having any of the above, any two adjacent layers among these layers are joined via a mixed adhesive containing a curable silicone composition for adhesion and a volatile hydrocarbon, A method for producing an oil-applied member, which comprises curing the curable silicone composition and then bonding the curable silicone composition with an adhesive layer containing fine pores formed by volatilizing the volatile hydrocarbon. 4. The oil retaining layer is composed of a porous ceramic material as a main component.
The method for manufacturing an oil application member according to any one of the above. 5. The method for producing an oil application member according to claim 1, wherein the porous membrane layer is a porous polytetrafluoroethylene layer. 6. The method for producing an oil application member according to claim 1, wherein the curable silicone composition contains a liquid silicone rubber that undergoes a crosslinking reaction. 7. The method for producing an oil application member according to claim 1, wherein the curable silicone composition contains a silicone varnish that undergoes a crosslinking reaction. 8. The production of an oil application member according to any one of claims 1 to 7, wherein the volatile hydrocarbon is a C ₉ H _{20 to} C ₁₆ H ₃₄ methane series hydrocarbon. Method. 9. The oil application according to claim 1, wherein the mixing ratio of the curable silicone composition and the volatile hydrocarbon is 90:10 to 20:80. A method of manufacturing a member. 10. The oil retaining layer has a cylindrical shape, a shaft serving as a rotating shaft is attached to the center of the cylinder, and a porous membrane layer and a coating amount fine adjustment layer are provided on the circumferential surface of the oil retaining layer. It has a roll shape formed, Claim 1 characterized by the above-mentioned.
9. The method for manufacturing an oil application member according to any one of items 1 to 9. 11. An oil holding layer containing release oil as a main component, a porous film layer for controlling the oil coating amount on the surface thereof, and a coating amount fine for finely adjusting the coating amount thereon. In the oil application member intermediate structure having an adjustment layer, the coating amount fine adjustment layer is formed in the void structure and surface of the porous membrane layer and includes fine pores and does not contain oil in the fine pores. An intermediate structure for an oil-applied member, which comprises a cured product of a conductive silicone composition. 12. An oil holding layer for holding and holding a release oil, a porous membrane layer for controlling an oil coating amount, and, if necessary, a porous oil transfer between the two layers, as main components. In an oil-applied member intermediate structure having a layer, any two adjacent layers of the respective layers are bonded by a cured product of an adhesive silicone composition containing fine pores and containing no oil in the fine pores. An oil application member intermediate structure characterized by the above.