JP2001166561A - Method for manufacturing image forming device member, image forming device member and image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacture which is capable of cost effectively executing small-volume production of many kinds of image forming device members in manufacture of the image forming device members consisting of polyurethane foam members and another members. SOLUTION: This method for manufacturing the image forming device members consisting of the polyurethane foam members and another members comprises casting the polyurethane raw material previously foamed into forms having a size for one component of the polyurethane foam members and progressing a curing reaction, thereby manufacturing the polyurethane foam members.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an image forming apparatus member used in an electrophotographic apparatus such as a copying machine, a facsimile, a printer, or an electrostatic recording apparatus, and an image forming apparatus manufactured by the manufacturing method. The present invention relates to a member and an image forming apparatus equipped with the member.

[0002]

2. Description of the Related Art In recent years, with the progress of electrophotographic technology, image forming apparatuses such as dry electrophotographic apparatuses have been used for charging, developing,
Polyurethane members have attracted attention as members used for transfer, toner supply, cleaning, etc., and include a charging roller, a developing roller, a transfer roller, a toner supply roller,
An elastic roller such as a cleaning roller or an elastic blade such as a toner layer regulating blade or a cleaning blade is used. When the polyurethane member is used for an application that requires particularly low hardness, it is preferable to apply a polyurethane foam. A polyurethane member is produced by reacting and curing a liquid polyisocyanate component and a liquid polyol component. As a method for forming a polyurethane foam, a method of mechanically stirring gas while blowing a gas such as nitrogen gas during the reaction curing (mechanical floss method), adding water to a polyol component, and adding water and a polyisocyanate component (Water foaming method), a low boiling point liquid such as chlorofluorocarbons and low boiling point hydrocarbons is added to a polyol component, and the low boiling point liquid is vaporized due to a rise in temperature during reaction curing. (Blowing agent floss method). Since the mechanical floss method is a manufacturing method in which the volume change during foaming hardening is small, the Asker C hardness is 25 to 65 ° and the density is 0.3 to 0.8 g / cm.
^{This is} a preferred method for obtaining a medium-hardness high-density foam of about ³ and the water foaming method has an Asker F hardness of 30 to 100 °.
This is a preferred method for obtaining a low-hardness low-density foam having a density of about 0.01 to 0.3 g / cm ³ . In order to manufacture an image forming apparatus member such as a roller made of polyurethane foam by the mechanical floss method, a metal shaft or the like is arranged in advance, and the preheated inner surface is foamed into a cylindrical metal mold by mechanical stirring. A polyurethane raw material may be cast and reacted and cured. Alternatively, a polyurethane raw material may be cast into a metal mold, and the mixture may be cured by mechanical stirring. In order to manufacture an image forming apparatus member such as a roller made of polyurethane foam by a water foaming method, first, for example, a polyurethane material is poured into a mold having an inner dimension of 1 m × 1 m × 1 m to a height of about 0.1 m, and the raw material is poured into the mold. Expands and cures along with foaming, resulting in 1m
A polyurethane foam block of about × 1 m × 1 m is obtained. Next, the obtained block is cut into a predetermined size, holes are formed, a shaft is press-fitted, and an image forming apparatus member such as a roller is manufactured through processes such as cutting or polishing. In addition, the foaming agent floss method using chlorofluorocarbons is an image forming apparatus from the viewpoint of protecting the ozone layer, and the foaming agent floss method using low boiling point hydrocarbons is both from the viewpoint of hazardous material management in a manufacturing plant. It is not used in the production of polyurethane foam for components.

[0003]

In the case of manufacturing an image forming apparatus member composed of a polyurethane foam member and other members by a water foaming method, processes such as cutting, punching, shaft press-fitting, cutting, and polishing of a polyurethane foam block. Is required, the process becomes complicated, and there is a problem that productivity is inferior to that of the mechanical floss method. However, the processes such as cutting and drilling can relatively easily cope with members of various sizes. Therefore, the water foaming method is a suitable production method for producing various types of members in small quantities. On the other hand, the mechanical floss method uses a polyurethane material that has been foamed in advance,
In order to arrange other members such as a metal shaft, and cast into a preheated metal mold, it is possible to bond the polyurethane foam member and other members at the same time as curing,
Further, since the metal roller is manufactured using a metal mold having substantially the same shape and size as the shape of the finished roller, there is an advantage that steps such as cutting and polishing are unnecessary or can be significantly simplified, and the productivity is high. However, in order to cope with small-quantity production of various types of members, the types and number of metal molds become enormous, and there is a problem that profitability is lost. The present invention has been made in view of the above circumstances, and in the production of an image forming apparatus member including a polyurethane foam member and other members, the production of a polyurethane foam member by a mechanical stirring method such as a mechanical floss method is performed by a water foaming method. An object of the present invention is to provide a manufacturing method capable of economically performing small-scale production of various types of image forming apparatus members while maintaining the advantage that productivity is higher than that of other image forming apparatuses.

[0004]

Means for Solving the Problems The present inventors have made intensive studies to achieve the above object, and as a result, have found that a mold having a size equivalent to one polyurethane foam member, that is, a polyurethane foam member is produced. It has been found that if a polyurethane foam material that has been foamed in advance is cast into a mold frame having a size sufficient and sufficient for curing and a curing reaction is allowed to proceed to produce a polyurethane foam member, it is possible to easily cope with small-quantity production of various members. The present invention has been completed based on such findings. That is, the present invention relates to a method for manufacturing an image forming apparatus member comprising a polyurethane foam member and another member, wherein a polyurethane material previously foamed in a mold having a size of one polyurethane foam member is cast, An object of the present invention is to provide a method for producing an image forming apparatus member, wherein a polyurethane foam member is produced by advancing a curing reaction.

[0005]

DETAILED DESCRIPTION OF THE INVENTION In the present invention, a pre-foamed polyurethane raw material is a polyurethane raw material in which air bubbles are mixed in advance, such as mechanical stirring in a mechanical floss method. It does not include water-foaming polyurethane foams or foaming agent floss polyurethane foams. In the present invention,
As a method for previously foaming the polyurethane raw material, a mechanical floss method is preferable. The inert gas to be mixed into the polyurethane raw material by the mechanical floss method may be any gas that is inert in the polyurethane reaction, such as helium, argon, xenon, radon, krypton, and other narrow gases, as well as nitrogen and dry air. And a gas which does not react with the polyurethane raw material.

As the polyisocyanate constituting the polyurethane raw material, aromatic isocyanates or derivatives thereof, aliphatic isocyanates or derivatives thereof, and alicyclic isocyanates or derivatives thereof are used. Of these, aromatic isocyanates or derivatives thereof are preferable, and tolylene diisocyanate or derivatives thereof, diphenylmethane diisocyanate or derivatives thereof are particularly preferably used. Examples of tolylene diisocyanate or a derivative thereof include crude tolylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, a mixture of 2,4-tolylene diisocyanate and 2,6-tolylene diisocyanate, Urea-modified, buret-modified, carbodiimide-modified, urethane-modified products modified with polyols and the like are used. As diphenylmethane diisocyanate or its derivative, for example, diphenylmethane diisocyanate or its derivative obtained by phosgenating diaminodiphenylmethane or its derivative is used. Examples of the derivative of diaminodiphenylmethane include polynuclear substances, such as pure diphenylmethane diisocyanate obtained from diaminodiphenylmethane, and polymeric diphenylmethane diisocyanate obtained from a polynuclear substance of diaminodiphenylmethane. Regarding the number of functional groups of polymeric diphenylmethane diisocyanate, a mixture of pure diphenylmethane diisocyanate and polymeric diphenylmethane diisocyanate having various functional groups is used, and the average number of functional groups is preferably 2.05.
~ 4.00, more preferably 2.50 ~ 3.50. Derivatives obtained by modifying these diphenylmethane diisocyanates or derivatives thereof, for example, urethane-modified products modified with polyols and the like, dimers formed by uretidion formation, isocyanurate-modified products, carbodiimide / uretonimine-modified products, allohanate-modified products, urea Modified products, buret modified products and the like can also be used. In addition, several kinds of diphenylmethane diisocyanates and derivatives thereof can be used by blending.

[0007] Polyol components constituting polyurethane raw materials include polyether polyol obtained by addition polymerization of ethylene oxide and propylene oxide, polytetramethylene ether glycol, polyester polyol obtained by condensing an acid component and a glycol component, and caprolactone by ring-opening polymerization. Polyester polyol, polycarbonate diol and the like can be used. Polyether polyols obtained by addition polymerization of ethylene oxide and propylene oxide include, for example, water, propylene glycol, ethylene glycol, glycerin, trimethylolpropane, hexanetriol, triethanolamine, diglycerin, pentaerythritol, ethylenediamine, methylglucode, Starting materials are aromatic diamines, sorbitol, sucrose, phosphoric acid, and the like, and examples of addition polymerization of ethylene oxide and propylene oxide include water, propylene glycol, ethylene glycol, glycerin, trimethylolpropane, and the like. Those using hexanetriol as a starting material are preferred. Regarding the ratio of ethylene oxide to propylene oxide and the microstructure to be added, the ratio of ethylene oxide is preferably from 2 to 95% by weight, more preferably from 5 to 90% by weight. Those having ethylene oxide added to the terminal are preferably used. Also, the arrangement of ethylene oxide and propylene oxide in the molecular chain is preferably random. The molecular weight of the polyether polyol is bifunctional when water, propylene glycol or ethylene glycol is used as a starting material, and is preferably in the range of 300 to 6000 in weight average molecular weight, particularly preferably in the range of 400 to 3000. . When glycerin, trimethylolpropane, or hexanetriol is used as a starting material, it is trifunctional and preferably has a weight average molecular weight in the range of 900 to 9000, particularly preferably 1500 to 6000. Further, a bifunctional polyol and a trifunctional polyol can be appropriately blended and used.

The polytetramethylene ether glycol is obtained, for example, by cationic polymerization of tetrahydrofuran, and those having a weight average molecular weight of 400 to 4000, particularly preferably 650 to 3000 are preferably used. It is also preferable to blend polytetramethylene ether glycols having different molecular weights. Furthermore, polytetramethylene ether glycol obtained by copolymerizing an alkylene oxide such as ethylene oxide or propylene oxide can also be used. It is also preferable to use a blend of polytetramethylene ether glycol and a polyether polyol obtained by addition polymerization of ethylene oxide and propylene oxide.In this case, polytetramethylene ether glycol, addition polymerization of ethylene oxide and propylene oxide are used. The ratio with the polyether polyol is 95:
It is preferably used in a range of 5 to 20:80, and particularly preferably in a range of 90:10 to 50:50. Further, together with the polyol component, a polymer polyol obtained by modifying the polyol with acrylonitrile, a polyol obtained by adding melamine to the polyol, a diol such as butanediol, a polyol such as trimethylolpropane, or a derivative thereof can be used in combination.

The polyol may be pre-polymerized with a polyisocyanate in advance. The method is as follows. The polyol and the polyisocyanate are placed in an appropriate container and sufficiently stirred at 30 to 90 ° C., more preferably at 40 to 90 ° C.
~ 70 ° C for 6-240 hours, more preferably 24-7
There is a method of keeping the temperature for 2 hours. In this case, the ratio of the amounts of polyol and polyisocyanate is preferably adjusted so that the isocyanate content of the obtained prepolymer is 4 to 30% by weight, more preferably 6% by weight.
１５15% by weight. If the content of the isocyanate is less than 4% by weight, the stability of the prepolymer may be impaired, and the prepolymer may be cured during storage and may not be usable. On the other hand, when the isocyanate content exceeds 30% by weight, the content of the non-prepolymerized polyisocyanate increases, and the polyisocyanate reacts with the polyol component used in the subsequent polyurethane curing reaction with the prepolymerization reaction. Since the curing is performed by a reaction mechanism similar to the one-shot manufacturing method without passing through, the effect of using the prepolymer method is reduced.

Polyurethane raw materials include a conductive agent such as an electrolyte, a conductive material such as carbon black, a filler such as carbon black and inorganic carbonate, an antioxidant such as phenol and phenylamine, a low friction agent, and a charge control agent. Etc. can be added. Examples of the catalyst used for the curing reaction of the polyurethane raw material include monoamines such as triethylamine and dimethylcyclohexylamine; diamines such as tetramethylethylenediamine, tetramethylpropanediamine and tetramethylhexanediamine; pentamethyldiethylenetriamine, pentamethyldipropylenetriamine;
Triamines such as tetramethylguanidine, cyclic amines such as triethylenediamine, dimethylpiperazine, methylethylpiperazine, methylmorpholine, dimethylaminoethylmorpholine, dimethylimidazole, dimethylaminoethanol, dimethylaminoethoxyethanol, trimethylaminoethylethanolamine, methyl Alcohol amines such as hydroxyethylpiperazine, hydroxyethylmorpholine, bis (dimethylaminoethyl) ether, ethylene glycol bis (dimethyl)
Ether amines such as aminopropyl ether, stannas octoate, dibutyltin diacetate, dibutyltin dilaurate, dibutyltin marker, dibutyltin thiocarboxylate, dibutyltin dimaleate, dioctyltin marker, dioctyltin thiocarboxylate, phenylmercurypropion And organometallic compounds such as lead octenoate. These catalysts may be used alone or in combination of two or more.

In the present invention, it is preferable to blend a silicone foam stabilizer and various surfactants with the polyurethane raw material in order to stabilize the cells of the foam material. As the silicone foam stabilizer, a dimethylpolysiloxane-polyoxyalkylene copolymer or the like is preferably used and has a molecular weight of 35.
Those comprising a dimethylpolysiloxane moiety of 0 to 15000 and a polyoxyalkylene moiety having a molecular weight of 200 to 4000 are particularly preferred. The molecular structure of the polyoxyalkylene moiety is preferably an ethylene oxide addition polymer or a co-addition polymer of ethylene oxide and propylene oxide, and it is also preferable that the molecular terminal is ethylene oxide. Examples of the surfactant include cationic surfactants, anionic surfactants, ionic surfactants such as amphoteric surfactants, and nonionic surfactants such as various polyethers and various polyesters. The compounding amount of the silicone foam stabilizer and various surfactants is preferably 0.1 to 10 parts by weight, preferably 0.5 to 10 parts by weight, based on 100 parts by weight of the polyurethane material.
More preferably, it is 5 parts by weight. The amount of the silicone foam stabilizer and various surfactants is 100
The amount is preferably 0.1 to 10 parts by weight, more preferably 0.5 to 5 parts by weight with respect to parts by weight.

[0012] The production method of the present invention is characterized in that a polyurethane material which has been foamed in advance is poured into a mold frame large enough to produce one member, and the curing reaction proceeds. is there. Here, a mold frame having a size sufficient to produce one member is, for example, a roller to be used for charging, developing, transferring, supplying toner, and cleaning. Refers to a mold frame of a size necessary and sufficient to produce one. Specifically, for example, when manufacturing a roller having a roller outer diameter of 16.5 mm and a roller length of 210.0 mm, the inner diameter of the mold is 16.5 to 20.0 mm ×
A rectangular parallelepiped of 16.5 to 20.0 mm × 210 to 250 mm having a concave portion, a U-shaped bottom of such a rectangular parallelepiped, an inner diameter of 16.5 to 20.0 mm and a length of 210 to 210
Examples thereof include a 250 mm hollow cylindrical shape, and a portion obtained by cutting a part of the cylinder. Among these molds, those having a U-shaped bottom, that is, those having a U-shaped vertical cross section in the longitudinal direction of the mold are preferable because the raw material can be easily poured and the amount of the raw material can be reduced. In addition, a form in which a plurality of forms having such a shape are continuous is also exemplified as the form used in the present invention. The mold used in the present invention is different from a metal mold conventionally used, and includes a metal such as aluminum, a synthetic resin such as polyethylene, polypropylene, polyethylene terephthalate, and polyvinyl chloride;
Any of paper, such as wood and cardboard, can be used. Therefore, even when a small number of various members are produced, a large number of mold frames can be manufactured at a low cost as compared with a metal mold, and even when a small number of various members are produced, the members can be manufactured at a low cost. . Among the above molds, a mold made of synthetic resin is preferable because it is lightweight, easy to handle, and can be used repeatedly. On the other hand, for example, the inside size is 300m
A mold having a concave shape and a rectangular parallelepiped of mx 300 mm x 20 mm is used. When the roller is manufactured using the mold, the polyurethane foam block manufactured by the mold is cut into several pieces to form several rollers. Such a mold is not included in the mold according to the present invention because the mold is manufactured.

In the manufacturing method of the present invention, the other members are
It refers to a shaft in a roller or the like used for charging, developing, transferring, supplying a toner, cleaning, or the like, or a support in a blade or the like. In the present invention,
If another member such as a shaft is placed in a mold and the foamed polyurethane material is cast here, steps such as demolding, drilling, and press-fitting of the shaft after curing become unnecessary, and slight cutting and polishing as necessary. By performing the finishing process, the members of the image forming apparatus can be obtained. Therefore, even when various kinds of members of the image forming apparatus are produced in small quantities, the members can be manufactured at lower cost. Specific examples of disposing the other members in the mold in advance include an example in which a shaft or the like is arranged in the center of the mold, and a case in which a support is arranged at the bottom of the mold.

According to the production method of the present invention, the Asker C hardness is 2
This is a suitable method for obtaining a medium-hardness high-density foam having a density of about 0.3 to 0.8 g / cm ³ at 5 to 60 °. Examples of the image forming apparatus member according to the present invention include a charging roller, a developing roller, a transfer roller, a toner supply roller, and a cleaning roller. FIG. 1 is an explanatory view showing an example of an electrophotographic image forming apparatus equipped with an image forming apparatus member of the present invention, and holds a developer supply member (toner supply roller) 3 and a latent electrostatic latent image. A developer carrier (developing roller) 2 is disposed between the image forming body 1 and the outer peripheral surface of the developer carrying body (developing roller) close to the surface of the image forming body 1. 2 shows a structure in which a transfer member (transfer roller) 5 is brought into contact with the transfer member. The developer (toner) is supplied to the surface of the developer carrier 2 by the developer supply member 3 by rotating the developer supply member 3, the developer carrier 2 and the image forming body 1 in the direction of the arrow.
After being formed into a uniform thin layer by the developer layer forming blade 4, it adheres to the latent image on the image forming body 1, and the latent image is visualized. Then, an electric field is generated between the image forming body 1 and the transfer member (transfer roller) 5 to transfer the developer (toner) image on the image forming body 1 to the recording medium 8. Reference numeral 6 denotes a cleaning member (cleaning roller) which removes a developer remaining on the surface of the image forming body 1 after transfer. Reference numeral 7 denotes a charging member (charging roller). Specific examples of the image forming apparatus include a plain paper copying machine, a plain paper facsimile machine, a laser beam printer, a toner jet printer, and the like.

[0015]

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. Example 1 is a mixture of diphenylmethane diisocyanate, carbodiimide-modified diphenylmethane diisocyanate, and glycol-modified diphenylmethane diisocyanate,
24.6 parts by weight of an isocyanate component having an isocyanate content of 26.2% by weight, and 60 parts by weight of a polyether polyol having a weight average molecular weight of 5,000 obtained by addition polymerization of ethylene oxide and propylene oxide with glycerin as a starting material, and 60 parts by weight of a molecular weight of 1,000 40 parts by weight of polytetramethylene ether glycol, hydroxyl value of 56 mg KO
H / g of 4 parts by weight of a reactive silicone foam stabilizer, 2.5 parts by weight of a black pigment, 0.4 parts by weight of ethyl sulphate-modified aliphatic dimethylethylammonium as an electrolyte and 0.01 parts by weight of dibutyltin dilaurate as a catalyst The resulting polyol components were mixed to prepare a polyurethane raw material. The polyurethane raw material was mechanically stirred with a mixer, mixed with dry air, and foamed. This foamed polyurethane raw material,
With a U-shaped depression, width 17.0mm, height 17.0mm,
The polypropylene mold 9 shown in FIG. 2 having a length of 250.0 mm
Was cast up to the upper surface. Inside the formwork 9, a shaft coated with an adhesive having an outer diameter of 6.0 mm and a length of 240 mm made of zinc-plated sulfur free-cutting steel and having a length of 240 mm is inserted into a hole 11 formed in a top 10 made of polyurethane foam. It is supported and arranged. The inner diameter of the hole 11 has a size corresponding to the outer diameter of the shaft. Next, the mold into which the foamed polyurethane material was cast was left in a hot-air oven adjusted to 90 ° C. for 4 hours to cure the foamed polyurethane material. Forming the cured polyurethane foam with the top 10
And polished with a grindstone so that the outer diameter becomes 16.5 mm, and then cut both ends to reduce the total length of the foam part to 2
The roller was 10 mm, and a roller for an image forming apparatus made of polyurethane foam was manufactured. The density of polyurethane foam is 0.
50 g / cm ³ , Asker C hardness of 40 °, roller resistance of room temperature of 23 ° C. and relative humidity of 50%, measurement voltage of 10
Was 10 ^7.9 Ω at 00V. The roller resistance was measured by applying a load of 500 g to both ends of the roller, pressing the roller against a copper plate, and applying a voltage of 1000 V using a resistivity meter R8340A (manufactured by Advantest). The above roller was incorporated into the image forming apparatus shown in FIG. 1 as a transfer roller, and left standing at a temperature of 23 ° C. and a relative humidity of 50% for 48 hours to print a gray scale, a black solid image and a white solid image. was gotten. When a roller having a different size is to be manufactured, the size of the roller in the longitudinal direction can be changed by changing the position at which the frame 10 is arranged on the mold 9, and the size of the U-shaped recess in the mold 9 is reduced. By changing, the outer diameter of the roller can be changed. When changing the outer diameter of the shaft, the hole 1 provided in the top 10 is required.
It is only necessary to change the inner diameter of 1 and it is possible to cope with the manufacture of various types of members.

COMPARATIVE EXAMPLE 1 A metal cylindrical shape having an inner diameter of 17.0 mm, a length of 210.0 mm, a hole at the end for penetrating the shaft, and a metal cap for supporting the shaft. Outer diameter of split mold, sulfur free-cutting steel, galvanized
An adhesive was applied to a shaft having a length of 6.0 mm and a length of 240 mm, and the shaft was arranged thereon. The same foamed polyurethane raw material as in Example 1 was cast. Next, the mold into which the foamed polyurethane material was cast was left in a hot air oven adjusted to 140 ° C. for 15 minutes to cure the foamed polyurethane material. The cured polyurethane foam is removed from the mold, polished with a grindstone so that the outer diameter becomes 16.5 mm, and then the both ends are cut to make the total length of the foam part 210 mm, thereby manufacturing a roller for a polyurethane foam image forming apparatus. did.
The density of the polyurethane foam is 0.50 g / cm ^3, Asker C hardness 40 °, the roller resistance at room temperature 23 ° C., at a relative humidity of 50%, was at 10 ^7.9 Omega measured voltage 1000V. The above roller was incorporated into the image forming apparatus shown in FIG. 1 as a transfer roller, and left standing at a temperature of 23 ° C. and a relative humidity of 50% for 48 hours to print a gray scale, a black solid image and a white solid image. was gotten. From the results of the above Examples and Comparative Examples, the polyurethane foam roller manufactured using the mold shown in FIG. 2 has the same good properties as the polyurethane foam roller manufactured using the metal cylindrical split mold. It turns out to be something. Therefore, according to the manufacturing method of the present invention, it is apparent that an image forming apparatus member having the same characteristics as the case using the metal mold can be obtained.

[0017]

According to the manufacturing method of the present invention, it is possible to economically manufacture various types of image forming apparatus members even when they are manufactured in small quantities. Can be provided at a low cost.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of an electrophotographic image forming apparatus in which a member of the image forming apparatus of the present invention is mounted as a transfer roller.

FIG. 2 is a schematic view showing an example of a mold according to the present invention.

FIG. 3 is a view showing a shape of a frame used in the mold shown in FIG. 2;

[Explanation of symbols]

 1: image forming body 2: developer carrying member 3: developer supplying member 4: developer layer forming blade 5: transfer member 6: cleaning member 7: charging member 8: recording medium 9: mold frame 10: frame 11: hole Department

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H003 BB11 CC05 2H032 AA05 2H034 BC03 BC04 BC05 2H077 AC04 AD02 AD06 FA21 3J103 AA02 AA21 AA32 BA41 EA02 EA03 EA05 EA11 FA15 GA02 GA57 GA58 GA60 GA73 GA74 HA12 HA18 HA48

Claims (12)

[Claims] In a method for manufacturing an image forming apparatus member comprising a polyurethane foam member and another member, a polyurethane raw material which has been foamed in advance is cast into a mold having a size equivalent to one polyurethane foam member, and cured. A method for producing a member of an image forming apparatus, wherein a polyurethane foam member is produced by advancing a reaction. 2. The method according to claim 1, wherein the mold is made of a synthetic resin. 3. The method according to claim 1, wherein the mold has a U-shaped vertical cross section in the longitudinal direction. 4. The method according to claim 1, wherein a plurality of molds each having a size of one polyurethane foam member are continuously arranged. 5. The manufacturing method according to claim 1, wherein the other member is previously arranged on a mold. 6. The method according to claim 1, wherein the other member is a shaft.
5. The production method according to any one of 5. 7. A polyurethane foam having a density of 0.3 to 0.3.
The process according to any one of claims 1 to 6 is of 8 g / cm ^3. 8. The production method according to claim 1, wherein the polyurethane foam has an Asker C hardness of 25 to 60 °. 9. The method according to claim 1, wherein the polyurethane foam is foamed by a mechanical floss method. 10. An image forming apparatus member manufactured by the manufacturing method according to claim 1. 11. The image forming apparatus member according to claim 10, wherein the image forming apparatus member is a charging roller, a developing roller, a transfer roller, a developer supply roller, or a cleaning roller. 12. An image forming apparatus comprising the image forming apparatus member according to claim 10.