Aromatic polyether ketone molded article and method for producing same

Abstract

To provide a technique capable of further improving the performance of an aromatic polyether ketone molded body.SOLUTION: An aromatic polyether ketone molded body comprises a main body part and a surface layer part covering the main body part. In both the main body part and the surface layer part, infrared absorption spectra including a peak A appearing in a wave number range of 1,295-1,340 cm-1 and a peak B appearing in a wave number range of 1,265-1,295 cm-1, as measured with an infrared spectrophotometer, are obtained. The ratio A' / B' of the intensity A' of the peak A to the intensity B' of the peak B is higher in the surface layer part than in the main body part.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an aromatic polyether ketone molded article that can be used for various parts, and a method for producing the same. [Background technology]

[0002] In the field of industrial machinery, there is a demand for replacing metal parts with resin molded articles from the viewpoint of weight reduction, etc. Super engineering plastics, such as polyether ether ketone (PEEK), which have particularly excellent heat resistance and mechanical strength, are used to manufacture such resin molded articles (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-111091 Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of resin molding, rapid cooling of the mold after molding is necessary to shorten the takt time, but rapid cooling of the mold tends to cause a decrease in strength near the surface where the progress of crystallization is easily hindered. In order to sufficiently progress the crystallization near the surface of the resin molding, the resin molding can be further subjected to a heat treatment such as annealing.

[0005] However, heat treatment of resin molded products increases the manufacturing cost of resin molded products because it requires a large amount of power and a longer takt time. Furthermore, the resin molded product undergoes significant dimensional changes due to shrinkage throughout the body during heat treatment. Therefore, it is necessary to design molds and other components that take into account the dimensional changes caused by heat treatment.

[0006] In view of the above circumstances, an object of the present invention is to provide a technique that can realize further improvement in the performance of aromatic polyether ketone molded articles. [Means for solving the problem]

[0007] In order to achieve the above object, an aromatic polyether ketone molded article according to one embodiment of the present invention includes a main body portion and a surface layer portion that covers the main body portion. In both the main body and the surface layer, the wavelength range of the infrared spectrophotometer is 1295 to 1340 cm -1 Peak A appears in the range of wavenumber 1265-1295 cm -1 An infrared absorption spectrum including peaks B and C appearing in the range The ratio A' / B' of the intensity A' of the peak A to the intensity B' of the peak B is higher in the surface layer portion than in the main body portion.

[0008] In this aromatic polyether ketone molded article, the surface layer portion constituting the surface has a higher crystallinity than the main body portion inside the surface layer portion, thereby providing high mechanical strength in the surface layer portion of this aromatic polyether ketone molded article, thereby making it possible to suppress the progression of wear and the occurrence of chipping. On the other hand, in this aromatic polyether ketone molded article, the main body portion, which does not have an increased crystallinity, maintains its impact absorption properties, and therefore impacts applied to the surface layer portion are absorbed by the main body portion. As a result, in this aromatic polyether ketone molded article, large localized stresses are less likely to be applied to the surface layer portion, thereby further suppressing the occurrence of damage.

[0009] The aromatic polyether ketone molded article may be formed from at least one of polyether ether ketone and polyether ketone. The aromatic polyether ketone molded article may be formed from an aromatic polyether ketone containing an additive. The aromatic polyether ketone molded article may be configured as a sliding member. The aromatic polyether ketone molded article may be configured as a gear member.

[0010] In one embodiment of the present invention, a method for producing an aromatic polyether ketone molded article is provided, in which an infrared spectrophotometer is used to measure an aromatic polyether ketone having a wave number of 1295 to 1340 cm -1 Peak A appears in the range of wavenumber 1265-1295 cm -1 and irradiating the surface of the molded body with an electron beam. In the step of irradiating with an electron beam, the ratio A' / B' of the intensity A' of the peak A to the intensity B' of the peak B in the surface layer portion of the molded body may be increased. In the step of irradiating the electron beam, the molded body may be heated. In these configurations, the degree of crystallinity can be selectively increased only in the surface layer portion that constitutes the surface of the aromatic polyether ketone molded article by irradiation with electron beams. [Effects of the Invention]

[0011] As described above, the present invention can provide a technique that can realize further improvement in the performance of aromatic polyether ketone molded articles. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a flowchart showing a method for manufacturing a resin molded body according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram showing an example of an infrared absorption spectrum of the resin molded body. [Figure 3] 10 is a graph showing the change in the ratio A' / B' depending on the electron beam irradiation dose. [Figure 4] FIG. 10 is a plan view showing an example in which the resin molded body is configured as a gear member. DETAILED DESCRIPTION OF THE INVENTION

[0013] [Explanation of aromatic polyether ketone molded products] The present invention relates to an aromatic polyether ketone molded article, which is a resin molded article formed from aromatic polyether ketone. Aromatic polyether ketone is a resin composed of a benzene ring, an ether, and a ketone, and a typical example is polyether ether ketone (PEEK), which has excellent heat resistance and mechanical strength.

[0014] In addition to PEEK, aromatic polyether ketones that can be used to form the resin molded article of the present invention include, for example, polyether ketone (PEK), polyether ketone ketone (PEKK), polyether ether ketone ketone (PEEKK), polyether ketone ether ketone ketone (PEKEKK), etc. The aromatic polyether ketone that forms the resin molded article of the present invention may be a blend of multiple types.

[0015] The resin molded article of the present invention may be formed from an aromatic polyether ketone containing an additive. The resin molded article can further improve its performance by using an additive. Examples of additives that can be used in the present invention include fibrous fillers, non-fibrous fillers, and solid lubricants.

[0016] Examples of fibrous additives include carbon fiber, nanocarbon (carbon nanotube or carbon nanowire), glass fiber, etc. Examples of non-fibrous fillers include graphite, mica, talc, alumina, etc. Examples of solid lubricants include polytetrafluoroethylene (PTFE), tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA), etc.

[0017] In the present invention, the performance of a resin molded article is improved by controlling the crystallinity of the aromatic polyether ketone constituting the resin molded article. In one embodiment of the present invention, the crystallinity of the aromatic polyether ketone is determined from an infrared absorption spectrum obtained by measurement using an infrared spectrophotometer.

[0018] Specifically, the infrared absorption spectrum is obtained by measuring the absorbance while continuously changing the wave number using an infrared spectrophotometer, and is shown as a graph with the wave number on the horizontal axis and the absorbance on the vertical axis. -1 The wavenumber range includes

[0019] The infrared absorption spectrum of aromatic polyether ketone has a wavenumber of 1295 to 1340 cm -1 Peak A appears in the range of wavenumber 1265-1295 cm -1 and Peak B, which appears in the range of 1. In aromatic polyether ketones, the higher the crystallinity, the higher Peak A becomes relative to Peak B.

[0020] Therefore, the crystallinity of an aromatic polyether ketone can be evaluated by the ratio A' / B' of the intensity A', obtained as the height of peak A, to the intensity B', obtained as the height of peak B. That is, for aromatic polyether ketones, the larger the ratio A' / B', the higher the crystallinity, and the smaller the ratio A' / B', the lower the crystallinity.

[0021] 1 is a flowchart showing a method for producing a resin molded product according to this embodiment. First, in step S01 of the production method according to this embodiment, a raw material resin is prepared. As the raw material resin prepared in step S01, for example, a commercially available product constituted as pellets or powder of aromatic polyether ketone can be used.

[0022] Next, in step S02, the raw material resin prepared in step S01 is molded. For molding the raw material resin, known molding methods such as injection molding and extrusion molding can be used. In step S02, the takt time can be shortened by rapidly cooling the mold before removing the raw material resin molded body after molding. In step S02, the raw material resin molded body removed from the mold may be subjected to processing such as cutting or grinding to modify its shape.

[0023] Then, in step S03, the entire surface of the molded product of the raw material resin obtained in step S02 is irradiated with an electron beam, whereby the electron beam incident on the surface of the molded product of the raw material resin promotes crystallization of the amorphous portion of the aromatic polyether ketone constituting the vicinity of the surface, thereby increasing the degree of crystallinity in the vicinity of the surface.

[0024] As a result, in step S03, a resin molded body is obtained that has a surface layer portion whose crystallinity has been increased by the electron beam irradiation and a main body portion located inside the surface layer portion and not affected by the electron beam irradiation. In the resin molded body after step S03, the main body portion covered by the surface layer portion maintains the same crystallinity as immediately after step S02.

[0025] 2 shows an example of infrared absorption spectra of the surface layer portion and the main body portion of the resin molded body according to this embodiment. The infrared absorption spectrum of the surface layer portion is obtained, for example, by measuring the absorbance of the surface of the resin molded body. The infrared absorption spectrum of the main body portion is obtained, for example, by cutting the resin molded body to expose the main body portion and measuring the absorbance of the cross section.

[0026] 2, the absorption spectrum of the surface layer portion is shown by a dashed line, and the absorption spectrum of the main body portion is shown by a solid line. The intensity B' of peak B is equivalent in the surface layer portion and the main body portion, whereas the intensity A' of peak A is higher in the surface layer portion than in the main body portion. In other words, in the resin molded article according to this embodiment, the ratio A' / B' of the intensities A' and B is higher in the surface layer portion than in the main body portion.

[0027] In a resin molded product, if the history of applied energy is uniform throughout, equivalent absorption spectra should be obtained from the surface layer and the main body. In contrast, in the resin molded product according to this embodiment, only Peak A is higher in the surface layer than in the main body, which indicates that the crystallinity is increased only in the surface layer.

[0028] In particular, in the molded body of the raw material resin immediately after step S02, when the mold is rapidly cooled as described above, crystallization of the surface layer adjacent to the mold does not progress sufficiently, and many amorphous portions often remain. In this regard, in the present embodiment, crystallization of the surface layer is progressed sufficiently in step S03, and further, the crystallinity of the surface layer can be made higher than that of the main body portion.

[0029] In the resin molded article according to this embodiment, by increasing the crystallinity of the surface layer, it is possible to increase the mechanical strength of the surface vicinity, which is prone to large external stresses, and thereby suppress the progression of wear and the occurrence of chipping in the surface vicinity constituted by the surface layer.

[0030] Furthermore, in the resin molded article according to this embodiment, the impact absorption properties of the main body, which is not affected by electron beam irradiation, are maintained, and therefore the impact applied to the surface layer is well absorbed. As a result, in the resin molded article according to this embodiment, large localized stress is less likely to be applied to the surface layer, and therefore the occurrence of damage can be more effectively suppressed.

[0031] In this way, in the resin molded article according to this embodiment, the mechanical strength of only the surface layer portion can be increased by irradiating it with an electron beam, without increasing the mechanical strength of the main body portion, thereby achieving the effect of suppressing the occurrence of damage due to the synergistic effect between the surface layer portion and the main body portion.

[0032] Furthermore, in the resin molded product according to this embodiment, the change in crystallinity caused by electron beam irradiation is limited to the surface layer, and the crystallinity of the main body, which accounts for the majority of the surface layer, is not changed. As a result, the amount of shrinkage due to the progress of crystallization after molding of this resin molded product remains small, and dimensional change from the shape immediately after molding can be kept small.

[0033] The thickness of the surface layer portion of the resin molded product according to this embodiment can be determined appropriately depending on the application, etc. For example, from the viewpoint of more reliably obtaining the above-described effect of the surface layer portion, it is preferable that the thickness of the surface layer portion is 50 μm or more. On the other hand, from the viewpoint of more effectively obtaining the impact absorption property of the main body portion, it is preferable that the thickness of the surface layer portion is kept to 700 μm or less.

[0034] The thickness of the surface layer of the resin molded product can be controlled in various ways by changing the electron beam irradiation conditions. However, since increasing the thickness of the surface layer requires large-scale equipment, it is preferable to keep the thickness of the surface layer at 700 μm or less from the viewpoint of keeping production costs low without using large-scale equipment.

[0035] Figure 3 is a graph plotting the ratio A' / B' of the surface layer when the electron beam irradiation dose is changed in step S03. Note that in all plots in Figure 3, the other electron beam irradiation conditions and the configuration of the raw material resin molded body are the same. In addition, the plot of zero irradiation dose in Figure 4 indicates the condition where no electron beam irradiation is performed.

[0036] As shown in Figure 3, it can be seen that the above-mentioned crystallization promotion effect is easily achieved by setting the electron beam irradiation dose to 50 kGy or more. On the other hand, if the electron beam irradiation dose is too high, decomposition of the molecular chains of the aromatic polyether ketone will progress. For this reason, it is preferable to keep the electron beam irradiation dose to 200 kGy or less.

[0037] In step S03, the raw material resin molded body is preferably irradiated with electron beams while being heated. This makes it easier to obtain the effect of improving the mechanical strength of the surface layer of the resin molded body, and for example, can further improve the fracture properties. The temperature of the raw material resin molded body during electron beam irradiation is preferably, for example, 200°C or higher.

[0038] The resin molded article according to this embodiment is particularly suitable for application to parts where stress is likely to concentrate on the surface. Examples of such parts include sliding members such as gear members, seal rings, thrust washers, and bearings. In a resin molded article configured as a sliding member, not only can the occurrence of damage be suppressed but also friction loss can be reduced.

[0039] 4 shows a gear member as an application example of the resin molded article according to this embodiment as a sliding member. In gear members, stress tends to concentrate at the roots of the multiple teeth T arranged continuously along the outer periphery, but by configuring the resin molded article according to this embodiment, chipping of the teeth T can be effectively suppressed.

[0040] [Examples and Comparative Examples] (Brief explanation) Examples and comparative examples of the above embodiment will be described. In Examples 1 to 8 and Comparative Examples 1 and 2, samples of resin molded bodies were prepared and evaluated. In all of Examples 1 to 8, the molded bodies of the raw material resins were irradiated with an electron beam, whereas in all of Comparative Examples 1 and 2, the molded bodies of the raw material resins were not irradiated with an electron beam.

[0041] In Examples 1 to 3, 5 to 8 and Comparative Examples 1 and 2, PEEK was used as the raw resin, specifically, "Vestakeep (registered trademark) 4000G" manufactured by Daicel-Evonik. In Example 4, PEK was used as the raw resin, specifically, "VICTREX (registered trademark) HT" manufactured by Victrex. In Example 5, 20 wt% carbon fiber and 10 wt% PTFE were added as additives to the raw resin.

[0042] Examples 1 to 5 In all of Examples 1 to 5, electron beam irradiation was performed at room temperature. In Examples 1 to 3, electron beam irradiation was performed at different irradiation doses. Specifically, in Example 1, the irradiation dose was 50 kGy, in Example 2, the irradiation dose was 100 kGy, and in Example 3, the irradiation dose was 200 kGy. In Example 4, the irradiation dose was 100 kGy, and in Example 5, the irradiation dose was 200 kGy.

[0043] In all of Examples 1 to 5, the electron beam was irradiated onto the raw material resin molded body using an "EC300 / 30 / 30mA" manufactured by Iwasaki Electric Co., Ltd. The electron beam irradiation conditions in all of Examples 1 to 4 were an acceleration voltage of 290 kV, a beam current of 6.3 mA, and a conveying speed of 8 m / min.

[0044] The samples according to Examples 1 to 5 all had the same configuration except for the configuration described above. Furthermore, the sample according to Comparative Example 1 was a molded body of the raw material resin of the samples according to Examples 1 to 3 before being irradiated with the electron beam. The absorbance of the surface layer and main body of the samples according to Examples 1 to 5 and Comparative Example 1 was measured using an infrared spectrophotometer. The absorbance was measured by the ATR method using a Ge lens and a Fourier transform infrared spectrophotometer "FT / IR-4600" manufactured by JASCO.

[0045] The ratio A' / B' was calculated from each infrared absorption spectrum obtained by measuring absorbance. Table 1 shows the ratios A' / B' of the surface layer portion and the main body portion for Examples 1 to 5 and Comparative Example 1. In Comparative Example 1, the ratio A' / B' was equal between the surface layer portion and the main body portion, whereas in all of Examples 1 to 5, the ratio A' / B' was higher in the surface layer portion than in the main body portion.

[0046] Next, a wear resistance test was conducted on each sample according to Examples 1 to 5 and Comparative Example 1 to evaluate wear characteristics. A reciprocating sliding friction and wear tester "TRIBOGEAR TYPE-14" manufactured by Shinto Scientific was used for the wear resistance test. For the wear resistance test, each sample was cut into a rectangular shape measuring 10 mm x 80 mm x 0.1 mm.

[0047] In addition, for the wear resistance tests of each sample, a conical indenter (made of sapphire, with an included angle of 90° and a tip curvature radius of 0.05 mm) was used, with a load of 150 gf, a sliding speed of 300 mm / min, and a travel distance of 10 mm, all of which were the same conditions. Each sample was judged as "OK" or "NG" based on whether or not there was wear of 100 μm or more.

[0048] Table 1 shows the results for each number of reciprocations (10 reciprocations, 20 reciprocations, 30 reciprocations, 40 reciprocations, 50 reciprocations) for Examples 1 to 5 and Comparative Example 1. As shown in Table 1, all of the samples according to Examples 1 to 5 showed good results up to 50 reciprocations, and exhibited higher wear resistance than the sample according to Comparative Example 1, which was rated "NG" at 40 reciprocations or more.

[0049] Next, a tensile test was performed on each sample according to Examples 1 to 3 and Comparative Example 1 to evaluate the fracture properties. For the tensile test, an "AGX" manufactured by Shimadzu Corporation was used. For the tensile test, each sample was cut into an A12 dumbbell shape in accordance with JIS K7139 (2009). For the tensile test of each sample, the pulling speed was 10 mm / min, and other conditions were the same.

[0050] As a result, Table 1 shows the percentage change in breaking strength for Examples 1 to 3 relative to Comparative Example 1. As shown in Table 1, all of the samples of Examples 1 to 3 have higher breaking strength than the sample of Comparative Example 1, and it is clear that the high breaking strength is achieved by the action of the surface layer portion.

[0051] Next, a tear test was conducted on each sample according to Examples 1 to 3 and Comparative Example 1 to evaluate the fracture properties. For the tear test, an "AGX" manufactured by Shimadzu Corporation was used. For the tear test, each sample was cut into a strip shape of 10 mm x 80 mm x 0.1 mm (with a 1 mm notch). For the tear test of each sample, the pulling speed was 10 mm / min, and the other conditions were the same.

[0052] As a result, Table 1 shows the percentage change in tear stroke for Examples 1 to 3 compared to Comparative Example 1. As shown in Table 1, the samples of Examples 1 to 3 all had larger tear strokes than the sample according to the Comparative Example, indicating that the larger tear strokes were achieved by the action of the surface layer.

[0053] Next, a friction test was conducted on each sample according to Examples 1 to 3 and Comparative Example 1 to evaluate the friction characteristics as a sliding member. For the friction test, a reciprocating sliding friction and wear tester "TRIBOGEAR TYPE-14" manufactured by Shinto Scientific was used. For the friction test, each sample was cut into a rectangular shape measuring 10 mm x 80 mm x 0.1 mm.

[0054] In addition, the friction tests for each sample were conducted using a spherical indenter (made of stainless steel, φ4 mm), with a load of 100 gf, a sliding speed of 600 mm / min, a travel distance of 20 mm, and other conditions were the same. Grease (Sumitec F931) was used to lubricate the sliding surface on which the indenter slid for each sample.

[0055] As a result, Table 1 shows the change rate (%) of the dynamic friction coefficient for Examples 1 to 3 relative to Comparative Example 1. As shown in Table 1, the samples of Examples 1 to 3 all have a lower dynamic friction coefficient than the sample according to the Comparative Example, and it is clear that the surface layer portion acts to provide high sliding properties as a sliding member.

[0056] Next, a gear fatigue test was conducted to evaluate the fatigue properties of each sample as a gear member according to Examples 1 to 3 and Comparative Example 1. In the gear fatigue test, each sample had a gear shape. In the gear fatigue test for each sample, a gear member (made of S45C) was used as the mating member, and the sample was rotated while meshing with the mating member.

[0057] In addition, the gear fatigue tests for each sample were conducted under the same conditions, with a rotational speed of 2000 rpm and a torque of 6 N·m. The lubrication condition between each sample and the mating material during rotation was dry. Each sample was judged as "OK" or "NG" based on the presence or absence of tooth chipping after 200,000 rotations.

[0058] Table 1 shows the results of the gear fatigue test for Examples 1 to 3 and Comparative Example 1. As shown in Table 1, no tooth chipping occurred in any of the samples according to Examples 1 to 3, whereas tooth chipping occurred in the sample according to Comparative Example 1. This shows that Examples 1 to 3 have high fatigue properties as gear members.

[0059] [Table 1]

[0060] (Examples 6 to 8) In Examples 6 to 8, the sample temperature during electron beam irradiation was changed from that in Example 2. Specifically, the sample temperature was 200°C in Example 6, 250°C in Example 7, and 300°C in Example 8. In addition, in all of Examples 6 to 8, the electron beam irradiation dose was 100 kGy, as in Example 2.

[0061] That is, in Examples 6 to 8, the electron beam irradiation conditions are different in that the samples are heated, as opposed to Example 2, in which the sample temperature is room temperature. A tensile test was performed on each sample in Examples 6 to 8 to evaluate the fracture properties. The tensile test conditions were the same as those in Examples 1 to 3 and Comparative Example 1 above.

[0062] As a result, Table 2 shows the percentage change in breaking strength for Examples 2 and 6 to 8 relative to Comparative Example 1. As shown in Table 2, it can be seen that the samples of Examples 6 to 8, which were irradiated with an electron beam while being heated, all had higher breaking strength than the sample of Example 2.

[0063] [Table 2]

[0064] Furthermore, a sample according to Comparative Example 2 was produced by subjecting the sample according to Comparative Example 1 to a heat treatment (annealing treatment) at 300°C. That is, the sample according to Comparative Example 2 is the same as the sample according to Example 8 in that the molded body of the raw material resin was heated to 300°C, but differs from the sample according to Example 8 in that it was not irradiated with an electron beam.

[0065] The sample according to Comparative Example 2 was subjected to the same tensile test as in Example 8. Table 3 shows the breaking strength of Example 8 as a percentage change relative to Comparative Example 2. As shown in Table 3, the sample according to Example 8, in which the sample was irradiated with an electron beam while being heated, had a higher breaking strength than the sample according to Comparative Example 2, in which the sample was simply heated.

[0066] [Table 3]

[0067] [Other embodiments] Although the embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to the above-described embodiments and that various modifications can be made.

[0068] For example, in the present invention, the method for increasing the crystallinity of the surface layer portion of an aromatic polyether ketone molded article is not limited to electron beam irradiation, and other methods for increasing the crystallinity of the surface layer portion include, for example, laser irradiation, UV irradiation, excimer irradiation, plasma irradiation, corona irradiation, flame treatment, and chemical treatment.

Claims

1. An aromatic polyether ketone molded article molded under conditions in which an amorphous portion remains, The device includes a main body portion and a surface layer portion that covers the main body portion, In both the main body portion and the surface layer portion, the wave number is 1295 to 1340 cm when measured by an infrared spectrophotometer. －１ Peak A appears in the range of wavenumber 1265 to 1295 cm －１ and a peak B appearing in the range a ratio A' / B' of an intensity A' of the peak A to an intensity B' of the peak B is higher in the surface layer portion than in the main body portion; The thickness of the surface layer portion is 50 μm or more and 700 μm or less. Aromatic polyether ketone molding.

2. The aromatic polyether ketone molded article according to claim 1, Formed from at least one of polyetheretherketone and polyetherketone Aromatic polyether ketone molding.

3. The aromatic polyether ketone molded article according to claim 1, Made from aromatic polyether ketone containing additives Aromatic polyether ketone molding.

4. The aromatic polyether ketone molded article according to any one of claims 1 to 3, configured as a sliding member Aromatic polyether ketone molding.

5. The aromatic polyether ketone molded article according to claim 4, Configured as a gear member Aromatic polyether ketone molding.

6. Measurement by infrared spectrophotometer revealed that the wavelength was 1295 to 1340 cm －１ Peak A appears in the range of wavenumber 1265 to 1295 cm －１ a step of preparing a molded body under conditions in which an amorphous portion remains, the molded body being capable of obtaining an infrared absorption spectrum including a peak B appearing in the range of a step of irradiating the surface of the molded body with an electron beam to increase a ratio A' / B' of an intensity A' of the peak A to an intensity B' of the peak B in a surface layer portion of the molded body; Including, The thickness of the surface layer portion is 50 μm or more and 700 μm or less. A method for producing an aromatic polyether ketone molded article.

7. A method for producing the aromatic polyether ketone molded article according to claim 6, comprising: In the step of irradiating the electron beam, the molded body is heated. A method for producing an aromatic polyether ketone molded article.

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