JP7444355B2 - Molded object and method for manufacturing the molded object - Google Patents

Description

The present invention relates to a molded article and a method for manufacturing the molded article.

Image forming apparatuses such as copying machines and laser beam printers generally employ a heat fixing method in the final stage of printing and copying. This thermal fixing method heats and melts the unfixed toner by passing the transferred material, such as printing paper, on which the toner image has been transferred, between a fixing roller that has a heat source inside and a pressure roller. This is a method in which an image is formed by fixing toner on an object to be transferred.

The fixing roller generally has a structure in which the outermost layer is formed on the outer peripheral surface of a cylindrical core made of synthetic resin, metal, or the like, either directly or through another layer. In recent years, as the printing or copying functions of image forming apparatuses have become faster, quality standards such as toner releasability required for fixing rollers have become higher. Therefore, in order to cope with this, a fixing roller has been devised that has a coating film made by mixing PTFE with PFA, which is expensive but has a small molecular weight and superior mold release properties than PTFE (see Japanese Patent Application Laid-Open No. 10-142990). .

Japanese Patent Application Publication No. 10-142990

However, fluororesin has low peel strength (adhesion) with the inner layer due to its low surface energy, so there is room for improvement in durability in high-speed printing. In addition, fluororesin has relatively low wear resistance and thermal conductivity, so if only fluororesin is used for sliding members, the surface is likely to wear, especially when the temperature of the sliding surface increases due to continuous operation. promoted.

The present invention has been made based on the above circumstances, and an object of the present invention is to provide a molded article having high wear resistance and excellent sliding properties, and a method for manufacturing the same.

A molded article according to an embodiment of the present invention made to solve the above problems includes a cylindrical base material layer mainly made of metal, and a polyether ether ketone layer laminated on the inner peripheral surface of the base material layer. Alternatively, it includes a sliding layer whose main component is filler-containing polyimide, and an outermost layer which is laminated on the outer peripheral surface side of the base layer and whose main component is a fluororesin.

Further, in a method for manufacturing a molded article according to another aspect of the present invention, which has been made to solve the above problems, polyether ether ketone or The method includes a step of laminating a sliding layer mainly composed of filler-containing polyimide.

Here, the "main component" refers to a component with the highest content, for example, a component with a content of 50% by mass or more.

The molded article according to one embodiment of the present invention can provide a molded article that has high wear resistance and excellent sliding properties. A method for producing a molded article according to another aspect of the present invention can produce a molded article with excellent sliding properties.

BRIEF DESCRIPTION OF THE DRAWINGS It is a typical cross-sectional view which shows the molded object based on 1st Embodiment of this invention. It is a typical cross-sectional view showing a molded object concerning a 2nd embodiment of the present invention.

[Description of embodiments of the present invention]
A molded article according to one embodiment of the present invention includes a cylindrical base layer containing metal as a main component, and a cylindrical base layer laminated on the inner circumferential surface of the base layer, and containing polyether ether ketone or filler-containing polyimide as the main component. It includes a sliding layer and an outermost layer that is laminated on the outer peripheral surface side of the base material layer and mainly contains a fluororesin.

The molded article has a sliding layer laminated on the inner peripheral surface of the base material layer, and since the sliding layer is mainly composed of polyether ether ketone or filler-containing polyimide, the molded article has high wear resistance. , excellent sliding properties. Furthermore, since the outermost layer is mainly composed of a fluororesin, mold releasability can be improved.

The sliding layer is mainly composed of polyether ether ketone, polytetrafluoroethylene (PTFE), polytetrafluoroethylene/perfluoroalkyl vinyl ether copolymer (PFA), or tetrafluoroethylene/hexafluoropropylene copolymer. It is preferable to further contain a polymer (FEP), a tetrafluoroethylene/ethylene copolymer (ETFE), or a combination thereof. When the sliding layer contains polyether ether ketone as a main component and further contains the above resin component, wear resistance and heat resistance can be further improved.

It is preferable that the average thickness of the sliding layer is 5 μm or more and 100 μm or less. When the average thickness of the sliding layer is within the above range, the wear resistance of the molded article can be further improved. Here, the term "average thickness" refers to the average value of thicknesses measured at arbitrary ten points.

Preferably, the molded article further includes an elastic layer that is laminated on the outer circumferential surface of the base layer and that contains rubber as a main component. The elasticity of the outermost layer mainly composed of fluororesin tends to be relatively low, but in this molded article, the elastic layer mainly composed of rubber is directly attached to the inner peripheral surface of the outermost layer mainly composed of fluororesin. Lamination improves the elasticity of the outermost layer.

In addition, in a method for producing a molded article according to another aspect of the present invention, a sliding material mainly composed of polyetheretherketone or filler-containing polyimide is coated on the inner circumferential surface of a cylindrical base material layer mainly composed of metal. It is preferable to include a step of laminating layers.

The method for producing a molded article includes the above steps, and thereby can produce a molded article with excellent sliding properties.

[Details of embodiments of the present invention]
DESCRIPTION OF THE PREFERRED EMBODIMENTS A molded article and a method for manufacturing the same according to an embodiment of the present invention will be explained in detail below with reference to the drawings.

[First embodiment]
<Molded object>
FIG. 1 is a schematic cross-sectional view showing a molded body 1 according to the first embodiment. The molded body 1 includes a cylindrical base material layer 2, a sliding layer 3 laminated on the inner circumferential surface of the base material layer 2, and a sliding layer 3 laminated on the outer circumferential surface side of the base material layer 2, the main component being a fluororesin. and an outermost layer 4. The molded body 1 has a cylindrical shape, so that it can be used as a fixing roller, a heating roller in a fixing unit of an image forming apparatus such as a copying machine, a printer, or a facsimile machine, a developing roller in a developing unit, a charging roller, a transfer roller, and endless parts in other parts. It can be suitably used for various rotating bodies (rollers), such as rollers for supporting belts, paper ejection rollers, dust removal rollers, and conveyance rollers.

The lower limit of the average thickness of the molded body 1 is not particularly limited, but is preferably, for example, 30 μm, and the upper limit of the average thickness is preferably, for example, 150 μm.

[Base material layer]
The base material layer 2 has metal as a main component. Further, the base material layer 2 has a cylindrical shape and can be suitably used in various rotating bodies (rollers) of image forming apparatuses.

The base material layer has metal as a main component. Examples of the metal include iron alloys such as stainless steel, nickel, aluminum, aluminum alloys, copper, and copper alloys. Among these, stainless steel or nickel is preferable as the metal because it has excellent malleability and heat resistance.

The lower limit of the metal content in the base layer 2 is preferably 90% by mass, more preferably 95% by mass, even more preferably 99% by mass, and particularly preferably 99.5% by mass. Moreover, the said content rate may be 100 mass %. That is, the base material layer 2 may be a metal plate or metal foil made only of metal and containing no binder or the like. When the content ratio is smaller than the lower limit, the flexibility and heat resistance of the molded article 1 may be insufficient, and the outermost layer 4 may be easily peeled off after being attached.

The average thickness of the base material layer 2 is not particularly limited as long as sufficient strength can be maintained, and is preferably 5 μm or more and 300 μm or less, for example.

[Sliding layer]
The sliding layer 3 is laminated on the inner circumferential surface of the base layer 2 . The sliding layer 3 is mainly composed of polyetheretherketone or filler-containing polyimide. Since the sliding layer 3 mainly contains polyetheretherketone or filler-containing polyimide, the molded article 1 has high wear resistance and excellent sliding properties.

The lower limit of the average thickness of the sliding layer 3 is preferably 5 μm, more preferably 10 μm, and even more preferably 20 μm. On the other hand, the upper limit of the average thickness is preferably 100 μm, preferably 50 μm, and more preferably 30 μm. When the average thickness is smaller than the lower limit, the wear resistance of the molded body 1 may be reduced. Conversely, if the average thickness exceeds the upper limit, the molded body 1 may become unnecessarily thick.

(Polyetheretherketone)
Polyetheretherketone has excellent wear resistance.

When the sliding layer 3 contains polyetheretherketone, the lower limit of the content of polyetheretherketone in the sliding layer 3 is preferably 51% by mass, more preferably 70% by mass. Further, the content of polyetheretherketone in the sliding layer 3 may be 100% by mass. When the content of polyetheretherketone in the sliding layer 3 is smaller than the above-mentioned lower limit, the abrasion resistance of the sliding layer 3 may decrease, and the abrasion resistance of the molded article 1 may become insufficient.

When the sliding layer 3 is mainly composed of polyetheretherketone, polytetrafluoroethylene (PTFE), polytetrafluoroethylene/perfluoroalkyl vinyl ether copolymer (PFA), or tetrafluoroethylene/hexafluoropropylene copolymer is used. (FEP), tetrafluoroethylene-ethylene copolymer (ETFE), or a combination thereof, and more preferably polytetrafluoroethylene. When the sliding layer contains polyetheretherketone as a main component and further contains the above-mentioned resin component, wear resistance and heat resistance can be further improved.

(Filler-containing polyimide)
Filler-containing polyimide is a resin component in which filler is contained in polyimide.

<Polyimide>
Polyimide is relatively lightweight and has excellent heat resistance and flexibility. Polyimide is a resin that has imide bonds in its molecules. Polyimide can be obtained by, for example, subjecting a tetracarboxylic acid or its anhydride as an acid component to a polycondensation reaction with a diamine compound as an amine component in a reaction solvent, and dehydrating and ring-closing the resulting polyimide precursor by heating or the like. be able to.

Examples of the above-mentioned tetracarboxylic acid or anhydride thereof include pyromellitic dianhydride, 3,3',4,4'-benzophenonetetracarboxylic dianhydride, benzene-1,2,3,4-tetracarboxylic acid Dianhydride, naphthalene-2,3,6,7-tetracarboxylic dianhydride, 3,3',4,4'-diphenyltetracarboxylic dianhydride, 2,2'',3,3'' -p-terphenyltetracarboxylic dianhydride, 2,2-bis(2,3-dicarboxyphenyl)-propane dianhydride, bis(2,3-dicarboxyphenyl)ether dianhydride, bis(2 ,3-dicarboxyphenyl)methane dianhydride, 3,3',4,4'-diphenylsulfonetetracarboxylic dianhydride, bis(2,3-dicarboxyphenyl)sulfone dianhydride, 1,1- Bis(2,3-dicarboxyphenyl)ethane dianhydride, perylene-3,4,9,10-tetracarboxylic dianhydride, phenanthrene-1,2,7,8-tetracarboxylic dianhydride, etc. aromatic tetracarboxylic dianhydride,
Alicyclic acid anhydrides such as cyclopentane-1,2,3,4-tetracarboxylic dianhydride,
Examples include heterocyclic derivatives such as pyrazine-2,3,5,6-tetracarboxylic dianhydride. The above tetracarboxylic acids or anhydrides thereof can be used alone or in combination of two or more.

Examples of the diamine compound include 2,2-di(p-aminophenyl)-6,6'-bisbenzoxazole, p-phenylenediamine, m-phenylenediamine, 4,4'-diaminodiphenylpropane, 2,2 -bis[4-(4-aminophenoxy)phenyl]propane, 4,4'-diaminodiphenylsulfone, 4,4'-diaminodiphenyl ether, benzidine, 4,4''-diamino-p-terphenyl, p-bis Aromatic diamines such as (2-methyl-4-aminopentyl)benzene, 1,5-diaminonaphthalene, 2,4-diaminotoluene, m-xylene-2,5-diamine, m-xylylenediamine,
Examples include aliphatic diamines such as piperazine, methylene diamine, ethylene diamine, and tetramethylene diamine. The above diamine compounds can be used alone or in combination of two or more.

When the sliding layer 3 contains filler-containing polyimide, the lower limit of the polyimide content in the sliding layer 3 is preferably 70% by mass, more preferably 90% by mass, and even more preferably 99% by mass. Further, the content of polyimide in the sliding layer 3 may be 100% by mass. When the content of polyimide in the sliding layer 3 is smaller than the above-mentioned lower limit, the abrasion resistance of the sliding layer 3 may decrease, and the sliding properties of the molded article 1 may become insufficient.

<Filler>
The above polyimide contains a filler. When the polyimide contains a filler, the wear resistance of the molded article can be improved.

As the filler, known fillers can be used, and examples thereof include titanic acid compounds such as potassium titanate and aluminum titanate, titanium oxide, carbon nanotubes, natural graphite, carbon fibers, glass fibers, and wollastenite. Plural types of fillers can be used.

The shape of the filler is preferably acicular or scaly from the viewpoint of further improving the wear resistance of the molded article. Here, "acicular" means a shape with an aspect ratio (ratio of filler diameter to length) of 1.5 or more, preferably 2 or more. The cross-sectional shape of the filler is not limited to a circle, and if the cross-section of the filler is not circular, the aspect ratio is determined using the maximum length of the cross-section as the diameter. Furthermore, "scaly" includes flaky and plate-like shapes.

(outermost layer)
The outermost layer 4 has a fluororesin as a main component. The outermost layer 4 is mainly composed of fluororesin and therefore has excellent wear resistance. The outermost layer 4 may contain other optional components within a range that does not impair the effects of the present invention.

Examples of the fluororesin include polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), and polyvinylidene fluoride (PVDF). ), tetrafluoroethylene-ethylene copolymer (ETFE), polychlorotrifluoroethylene (PCTFE), chlorotrifluoroethylene-ethylene copolymer (ECTFE), polyvinyl fluoride (PVF), fluoroolefin-vinylether copolymer, Examples include vinylidene fluoride-tetrafluoroethylene copolymer, vinylidene fluoride-hexafluoropropylene copolymer, and the like. Among these, the fluororesin is preferably PTFE, PFA, and FEP, more preferably PFA and PTFE, and even more preferably PTFE from the viewpoints of wear resistance, chemical resistance, and heat resistance. The above fluororesins can be used alone or in combination of two or more.

In addition, the said fluororesin may contain the polymerization unit derived from other copolymerizable monomers in the range which does not impair the effect of this invention. For example, PTFE may include polymerized units such as perfluoro(alkyl vinyl ether), hexafluoropropylene, (perfluoroalkyl)ethylene, chlorotrifluoroethylene, and the like. The upper limit of the content of polymerized units derived from the other copolymerizable monomers is, for example, 3 mol % with respect to all polymerized units constituting the fluororesin.

The lower limit of the average thickness of the outermost layer 4 is preferably 5 μm, more preferably 20 μm. On the other hand, the upper limit of the average thickness is preferably 50 μm, more preferably 40 μm. If the average thickness is smaller than the lower limit, the durability of the molded body 1 may be reduced. On the other hand, if the average thickness exceeds the upper limit, the elasticity of the molded body 1 may decrease.

<Method for manufacturing molded body>
The method for manufacturing the molded article includes the step of laminating a sliding layer mainly composed of polyetheretherketone or filler-containing polyimide on the inner peripheral surface of a cylindrical base material layer mainly composed of metal. The method for producing a molded article includes the above steps, and thereby can produce a molded article with excellent sliding properties. Moreover, it is preferable that the manufacturing method of the said molded object further comprises the outermost layer lamination process of laminating an outermost layer on the outer peripheral surface side of a base material layer.

(Sliding layer lamination process)
In this step, a sliding layer is laminated on the inner peripheral surface of a cylindrical base material layer whose main component is metal. First, a resin composition for a sliding layer containing polyetheretherketone or filler-containing polyimide as a main component is prepared. Next, a sliding layer is formed by performing coating, extrusion molding, injection molding, etc. using the resin composition for a sliding layer, followed by firing. The coating means is not particularly limited, and various methods such as a spray coater, an electrostatic coating device, a flow coater, and a dip coater can be used. Further, the firing temperature can be, for example, 100° C. or more and 500° C. or less.

(Outermost layer lamination process)
In this step, an outermost layer containing a fluororesin as a main component is laminated on the outer peripheral surface side of the base material layer after the sliding layer lamination step. Examples of methods for laminating the outermost layer containing a fluororesin as a main component include coating with a resin composition for the outermost layer containing a fluororesin as a main component, covering with a PFA heat-shrinkable tube, and the like. When coating a resin composition for the outermost layer containing a fluororesin as a main component, apply a paint obtained by dispersing or dissolving the resin composition for the outermost layer containing a fluororesin in a solvent to the outer peripheral surface of the base material layer. Coat on. As this solvent, a mixed solution of water and an emulsifier, water and alcohol, water and acetone, water, alcohol, and acetone, etc., which can efficiently disperse the fluororesin, can be used. Next, the base material layer coated with this paint is placed in a heating furnace and heated to evaporate the solvent in the paint and bake the fluororesin. The firing temperature of the fluororesin can be, for example, 300°C or more and 400°C or less. Thereafter, the outermost layer is formed on the outer peripheral surface of the base material layer by cooling the outer peripheral surface of the base material layer.

<Advantages>
The molded article according to the first embodiment has high abrasion resistance and excellent sliding properties, so it can be used in the fixing roller, heating roller, developing roller, charging roller, transfer roller, etc. in the fixing unit of the image forming apparatus, and in the developing unit. It can be suitably used for various rotating bodies (rollers) such as a roller for supporting an endless belt in a section, a paper ejection roller, a dust removal roller, and a conveyance roller.

[Second embodiment]
<Molded object>
The molded article according to the second embodiment further includes an elastic layer that is laminated on the outer circumferential surface of the base layer and mainly contains rubber.

FIG. 2 is a schematic cross-sectional view showing a molded body 10 according to the second embodiment. The molded body 10 in FIG. 2 includes a cylindrical base material layer 2, a sliding layer 3 laminated on the inner peripheral surface of the base material layer 2, and an elastic layer 5 laminated on the outer peripheral surface of the base material layer 2. and an outermost layer 4 laminated on the outer peripheral surface of the elastic layer 5. Note that the base material layer 2, sliding layer 3, and outermost layer 4 are the same as those in the first embodiment, so the same numbers are given and descriptions thereof will be omitted.

(elastic layer)
The elastic layer 5 is laminated on the outer peripheral surface of the base layer 2. The elastic layer 5 has rubber as a main component. Therefore, the elastic layer 5 has sufficient elasticity. Although the elasticity of the outermost layer 4 mainly composed of fluororesin tends to be relatively low, in the molded article 10, the elastic layer mainly composed of rubber By laminating the outermost layer 4, the elasticity of the outermost layer 4 can be improved. Further, by laminating the elastic layer 5 on the inner circumferential surface of the outermost layer 4, the interlayer adhesive force between the elastic layer 5 and the outermost layer 4 can be further improved. Moreover, it is preferable that the above-mentioned rubber is vulcanized. By vulcanizing the rubber, the elasticity of the elastic layer 5 can be further improved, and as a result, the elasticity of the molded body 10 is further improved.

The above-mentioned rubber is not particularly limited, but includes, for example, natural rubber, synthetic natural rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, nitrile rubber, ethylene propylene rubber, chloroprene rubber, acrylic rubber, chlorosulfonated polyethylene rubber, urethane rubber, and silicone. Rubber, fluororubber, ethylene vinyl acetate rubber, epichlorohydrin rubber, multiflow rubber, etc. can be used. The above rubbers can be used alone or in combination of two or more.

The lower limit of the rubber content in the elastic layer 5 is preferably 70% by mass, more preferably 90% by mass, and even more preferably 99% by mass. Further, the rubber content in the elastic layer 5 may be 100% by mass. When the rubber content in the elastic layer 5 is smaller than the above-mentioned lower limit, the elasticity of the elastic layer 5 decreases, and there is a possibility that the elasticity of the molded body 1 becomes insufficient.

The elastic layer 5 may contain additives as components other than rubber. Examples of the additives include plasticizers, stabilizers, lubricants, antioxidants, ultraviolet absorbers, flame retardants, colorants, fillers, and the like. In this way, the elastic layer 5 contains the above-mentioned additive, thereby imparting desired characteristics to the elastic layer 5. The upper limit of the content of the additive in the elastic layer 5 is not particularly limited, but is preferably 30% by mass, for example.

The average thickness of the elastic layer 5 is not particularly limited and can be changed as appropriate depending on the application, but may be, for example, 0.1 mm or more and 50 mm or less.

<Method for manufacturing molded body of second embodiment>
The method for manufacturing the molded body of the second embodiment may further include, for example, the step of laminating an elastic layer on the outer peripheral surface of the base material layer after the sliding layer lamination step of the method for manufacturing the molded body of the first embodiment. One example is how to prepare. In the elastic layer lamination process, first, a resin composition for a sliding layer containing rubber as a main component is prepared. Next, an elastic layer is formed by performing coating, extrusion molding, injection molding, etc. using the resin composition for a sliding layer, and then solidifying the resin composition. Incidentally, the rubber of the elastic layer can be vulcanized at any time during the production of the molded article.

<Advantages>
The molded body according to the first embodiment has a cylindrical shape, so that it can be used as a fixing roller, a heating roller, a developing roller, a charging roller, a transfer roller in a developing unit, in a fixing unit of an image forming apparatus such as a copying machine, a printer, or a facsimile machine. It can be suitably used for various rotating bodies (rollers) such as rollers for supporting endless belts in other parts, paper ejection rollers, dust removal rollers, and conveyance rollers.

[Other embodiments]
The embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is not limited to the configuration of the above-described embodiments, but is indicated by the claims, and is intended to include all changes within the meaning and scope equivalent to the claims. Ru.

The molded article may include other layers between the sliding layer and the base layer, between the outermost layer and the base layer, between the outermost layer and the elastic layer, and the like. Examples of the other layers include a primer layer and the like.

Further, the inner circumferential surface of the outermost layer may be subjected to surface treatment in order to improve its adhesion. Examples of the surface treatment include roughening by sandblasting, etching, electrolytic polishing, and the like.

Furthermore, the wear resistance of the outermost layer 4 may be improved by irradiating the outermost layer 4 with ionizing radiation to crosslink the fluororesin.

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to the following Examples.

<Sliding layer resin composition No. 1~No. 5>
Resin composition No. 1 for a sliding layer for forming a sliding layer of a molded article. 1~No. A film was prepared using No. 5 according to the following procedure, and its sliding properties were evaluated. Resin composition for sliding layer No. 1~No. Table 1 shows the composition of No. 5 and the average thickness of the film. Note that "-" in Table 1 indicates that the corresponding component was not used.

(resin component)
The following resin components were used in the resin composition for the sliding layer.
Polyetheretherketone: VICTREX's "VICOTE F804, VICOTE F804BLK, VICOTE F810, VICOTE F810BLK, VICOTE F807BLK, VICOTE F816BK"
Polytetrafluoroethylene: “Okitsumo” from Okitsumo Co., Ltd.
Polyimide: Ube Industries'"UVarnish"

(filler)
The following fillers were used in the resin composition for the sliding layer.
Acicular titanium oxide: “FTL300” by Ishihara Sangyo Co., Ltd.
Flake graphite: Chuetsu Graphite Co., Ltd.'s "BK-3AK"
Carbon nanotube: Showa Denko's "VGCF-H"

<Rotational wear evaluation using pin-on-disk type wear test>
The pin-on-disk type wear test refers to a test in which, for example, the tip of an iron pin is pressed perpendicularly to the sliding surface of the test target member while rotating the sliding surface to cause the member to rotate in revolution. Specifically, sliding layer resin composition No. 1~No. The surface of the film No. 5 was heated at 180°C and rotated under a pressing load of 107.87 kPa using two stainless steel pins with a diameter of 17.4 mm arranged on one circumference around the rotation axis. A pin-on-disk type wear test was conducted in which the sample was slid at a speed of 210 rpm for 2000 seconds, and the wear depth [μm] of the worn area was measured. Note that the tip of the pin was flat.
Table 1 shows the evaluation results.

As shown in Table 1, resin composition No. 1 for a sliding layer containing polyetheretherketone or filler-containing polyimide as a main component. 1~No. In No. 4, the amount of wear in the pin-on-disk type wear test was small, indicating that the sliding layer was not easily deformed during sliding. On the other hand, resin composition No. 1 for a sliding layer which does not contain polyetheretherketone or filler-containing polyimide and whose main component is polytetrafluoroethylene. No. 5 had a large amount of wear and poor sliding properties. Therefore, the molded article was shown to have high wear resistance and excellent sliding properties.

A molded article and a method for manufacturing the same according to one embodiment of the present invention can provide a molded article that has high wear resistance and excellent sliding properties. The molded article according to one embodiment of the present invention can be suitably used in various rotating bodies (rollers) in fixing units of image forming apparatuses such as copying machines, printers, and facsimile machines.

1, 10 Molded object 2 Base material layer 3 Sliding layer 4 Outermost layer 5 Elastic layer

Claims (3)

A cylindrical base material layer having an average thickness of 5 μm or more and 300 μm or less and mainly composed of stainless steel or nickel ;
A sliding layer laminated on the inner circumferential surface of the base layer and containing polyetheretherketone (PEEK) as a main component;
an elastic layer laminated on the outer peripheral surface of the base material layer and mainly composed of rubber;
an outermost layer laminated on the outer peripheral surface of the elastic layer and containing fluororesin as a main component;
The average thickness of the sliding layer is 10 μm or more and 100 μm or less,
A pin-on-disc type wear test in which two stainless steel pins with a diameter of 17.4 mm are slid on the sliding layer heated to 180°C for 2000 seconds at a pressure load of 107.87 kPa and a rotational speed of 210 rpm shows that the amount of wear is 0. .A molded article having a diameter of 6 μm or less. The sliding layer contains the polyether ether ketone as a main component, and also contains polytetrafluoroethylene (PTFE), polytetrafluoroethylene/perfluoroalkyl vinyl ether copolymer (PFA), and tetrafluoroethylene/hexafluoropropylene. The molded article according to claim 1, further comprising a polymer (FEP), a tetrafluoroethylene-ethylene copolymer (ETFE), or a combination thereof. Laminating a sliding layer mainly composed of polyetheretherketone on the inner peripheral surface of a cylindrical base material layer having an average thickness of 5 μm or more and 300 μm or less and mainly composed of stainless steel or nickel ;
a step of laminating an elastic layer mainly composed of rubber on the outer peripheral surface of the base material layer after the sliding layer lamination step;
a step of laminating an outermost layer containing a fluororesin as a main component on the outer peripheral surface of the elastic layer after the elastic layer lamination step,
The average thickness of the sliding layer is 10 μm or more and 100 μm or less,
A pin-on-disk type abrasion test in which two stainless steel pins with a diameter of 17.4 mm are slid on the sliding layer heated to 180°C for 2000 seconds at a pressure load of 107.87 kPa and a rotational speed of 210 rpm shows that the amount of wear is 0. .A method for producing a molded article having a diameter of 6 μm or less.

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