Method for producing filament, and method for producing three-dimensional molded article

Abstract

To provide a method for producing filament that enables precise production of filament and is capable of inhibiting bubble formation and burning when producing the filament.SOLUTION: A filament production method including step (1) of obtaining a filament by melt-spinning a resin composition comprising a 4-methyl-1-pentene-based polymer under temperature conditions such that the maximum reached temperature is (Tx+10)°C to (Tx+130)°C, where Tx represents the melting point (°C) when the 4-methyl-1-pentene-based polymer has both of a melting point (°C) and a glass transition temperature (°C), and represents either of the melting point (°C) or the glass transition temperature (°C) when the polymer has only one of them).SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present disclosure relates to a method for manufacturing a filament and a method for manufacturing a three-dimensional object. [Background technology]

[0002] In recent years, a modeling method in which a 3D object is obtained using a manufacturing device for 3D modeling (for example, a 3D printer) has been attracting attention as one of the efficient modeling technologies. Among the above-mentioned modeling methods, the fused deposition modeling (FDM) method, which melts and layers thermoplastic resin, is advantageous in terms of cost in addition to being able to use a wide range of materials. For example, Patent Document 1 discloses a specific polyamide as a resin used in modeling with a 3D printer using a hot melt method. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-109558 Summary of the Invention [Problem to be solved by the invention]

[0004] The present inventors have found that a 4-methyl-1-pentene polymer is a resin that may be suitable for the hot melt method in terms of physical properties and the like. Therefore, in order to use a resin composition containing a 4-methyl-1-pentene polymer in three-dimensional modeling using the hot melt method, we investigated the production of filaments from this resin composition. However, when attempts were made to produce filaments using a resin composition containing a 4-methyl-1-pentene polymer, the precision of the produced filaments (specifically, the dimensional precision and shape precision) was insufficient, and / or bubbles or burns were generated during the production of the filaments. Here, dimensional accuracy is evaluated by the smallness of deviation from a target dimension, and shape accuracy is evaluated by circularity (that is, the closer the circularity is to 1, the better the shape accuracy).

[0005] An object of one embodiment of the present disclosure is to provide a method for manufacturing a filament that can manufacture a filament with high precision and can suppress bubbles and burning during manufacturing of the filament, and a method for manufacturing a three-dimensional object by a thermal melting method using the manufactured filament. [Means for solving the problem]

[0006] Specific means for solving the above problems are as follows. <1> A method for producing a filament, comprising: (1) melt-spinning a resin composition containing a 4-methyl-1-pentene polymer under temperature conditions such that the maximum temperature reaches a range of (Tx+10)°C to (Tx+130)°C (where Tx means the melting point (°C) when the 4-methyl-1-pentene polymer has both a melting point (°C) and a glass transition temperature (°C), or Tx means either the melting point (°C) or the glass transition temperature (°C) when the 4-methyl-1-pentene polymer has only one of the melting point (°C) or the glass transition temperature (°C)), to obtain a filament. <2> In the step (1), the resin composition is melt-spun under a temperature condition in which the maximum temperature reaches a range of 235°C to 350°C to obtain a filament. <1> A method for producing the filament described in <3> The method further includes, after the step (1), a step (2) of winding the filament. <1> or <2> A method for producing the filament described in <4> In the step (2), the filament is wound at a speed of 0.05 kg / h to 100 kg / h. <3> A method for producing the filament described in <5> The diameter of the filament is 1.00 mm to 10.00 mm. <1> ~ <4> 10. A method for producing a filament according to any one of the preceding claims. <6> The content of the 4-methyl-1-pentene polymer in the resin composition is 90 mass% or more based on the total amount of the resin composition. <1> ~ <5> 10. A method for producing a filament according to any one of the preceding claims. <7> <1> ~ <6> a step of obtaining a filament by the filament manufacturing method according to any one of the above; performing three-dimensional modeling using the filament by a thermal fusion method to obtain a three-dimensional model; A method for manufacturing a three-dimensional object, comprising: [Effects of the Invention]

[0007] According to one aspect of the present disclosure, there is provided a method for manufacturing a filament that can accurately manufacture a filament and suppress bubbles and burning during filament manufacturing, and a method for manufacturing a three-dimensional object by a thermal melting method using the manufactured filament. DETAILED DESCRIPTION OF THE INVENTION

[0008] In the present disclosure, a numerical range indicated using "to" means a range that includes the numerical values before and after "to" as the minimum and maximum values, respectively. In the present disclosure, the term "process" includes not only an independent process but also a process that cannot be clearly distinguished from other processes as long as the intended purpose of the process is achieved. In the present disclosure, when there are multiple substances corresponding to each component, the amount of each component means the total amount of the multiple substances unless otherwise specified. In this disclosure, "(meth)acryloyl group" means acryloyl group and methacryloyl group, and "(meth)acrylate" means acrylate and methacrylate.

[0009] [Filament manufacturing method] The method for producing a filament according to the present disclosure includes a step (1) of melt-spinning a resin composition containing a 4-methyl-1-pentene polymer under temperature conditions such that the maximum temperature reaches a range of (Tx+10)°C to (Tx+130)°C to obtain a filament. Here, when the 4-methyl-1-pentene polymer has both a melting point (°C) and a glass transition temperature (°C), Tx means the melting point (°C) of the 4-methyl-1-pentene polymer; when the 4-methyl-1-pentene polymer has only one of a melting point (°C) and a glass transition temperature (°C), Tx means either one of the two.

[0010] According to the filament manufacturing method of the present disclosure, the filament can be manufactured with high precision, and the generation of bubbles and burning during the manufacturing of the filament can be suppressed. The obtained filament is used to perform three-dimensional modeling using the hot melt method to obtain a three-dimensional object, which results in less uneven discharge during modeling and a good appearance for the resulting three-dimensional object.

[0011] <Process (1)> Step (1) in the filament production method of the present disclosure is a step of melt-spinning a resin composition containing a 4-methyl-1-pentene polymer (hereinafter also referred to as "resin composition (A)") under temperature conditions such that the maximum temperature reaches a range of (Tx + 10)°C to (Tx + 130)°C to obtain a filament.

[0012] (Resin composition (A)) The resin composition (A) contains a 4-methyl-1-pentene polymer. The resin composition (A) may contain only one type of 4-methyl-1-pentene polymer, or may contain two or more types.

[0013] The 4-methyl-1-pentene polymer contains 4-methyl-1-pentene units (ie, structural units derived from 4-methyl-1-pentene). The 4-methyl-1-pentene polymer may be a homopolymer of 4-methyl-1-pentene or a copolymer of 4-methyl-1-pentene with another monomer.

[0014] The ratio of 4-methyl-1-pentene units to all structural units in the 4-methyl-1-pentene polymer may be 50 mol % to 100 mol %, 60 mol % to 100 mol %, or 80 mol % to 100 mol %, for example. When the 4-methyl-1-pentene polymer is a copolymer with other monomers, the ratio of 4-methyl-1-pentene units to all structural units in the 4-methyl-1-pentene polymer may be 99 mol% or less, 95 mol% or less, 90 mol% or less, or 80 mol% or less. These ratios are determined by carbon 13C nuclear magnetic resonance (hereinafter referred to as 13 It can be calculated using a measurement method called C-NMR.

[0015] When the 4-methyl-1-pentene polymer is a copolymer with other monomers, examples of the other monomers include α-olefins having 2 to 20 carbon atoms (excluding 4-methyl-1-pentene). Examples of the α-olefins having 2 to 20 carbon atoms (excluding 4-methyl-1-pentene) include ethylene, propylene, 1-butene, 1-pentene, 3-methyl-1-butene, 1-hexene, 3-methyl-1-pentene, 3-ethyl-1-pentene, 4,4-dimethyl-1-pentene, 4-methyl-1-hexene, 4,4-dimethyl-1-hexene, 4-ethyl-1-hexene, 3-ethyl-1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, and 1-eicosene. Among these, ethylene, propylene, 1-butene, 3-methyl-1-butene, 1-hexene, 3-methyl-1-pentene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, and 1-octadecene are preferred. These α-olefins may be used alone or in combination of two or more.

[0016] The 4-methyl-1-pentene polymer preferably has a content of 90 mol % to 100 mol % of structural units derived from 4-methyl-1-pentene and a content of 0 mol % to 10 mol % of structural units derived from at least one olefin (hereinafter also referred to as comonomer) selected from α-olefins having 2 to 20 carbon atoms (excluding 4-methyl-1-pentene). Furthermore, from the viewpoints of transparency and heat resistance, the content of structural units derived from 4-methyl-1-pentene relative to all structural units contained in the 4-methyl-1-pentene polymer is preferably 92 mol% to 100 mol%, more preferably 95 mol% to 100 mol%, and the content of structural units derived from at least one olefin selected from α-olefins having 2 to 20 carbon atoms (excluding 4-methyl-1-pentene) is preferably 0 mol% to 8 mol%, more preferably 0 mol% to 5 mol%.

[0017] The 4-methyl-1-pentene polymer may have either a melting point (°C) or a glass transition temperature (°C), or may have both a melting point (°C) and a glass transition temperature (°C). The Tx of the 4-methyl-1-pentene polymer (i.e., the melting point (°C) of the 4-methyl-1-pentene polymer when the 4-methyl-1-pentene polymer has both a melting point (°C) and a glass transition temperature (°C); when the 4-methyl-1-pentene polymer has only one of a melting point (°C) and a glass transition temperature (°C), either one of them) is preferably 200°C to 250°C, more preferably 200°C to 245°C, and even more preferably 200°C to 240°C. Tx can be measured by differential scanning calorimetry (DSC).

[0018] The melt flow rate (MFR) of the 4-methyl-1-pentene polymer measured in accordance with ASTM D1238 at 260°C under a load of 5.0 kg is, for example, 0.01 g / 10 min to 250 g / 10 min, preferably 5 g / 10 min to 230 g / 10 min, more preferably 10 g / 10 min to 220 g / 10 min, and even more preferably 15 g / 10 min to 200 g / 10 min.

[0019] The 4-methyl-1-pentene polymer has an intrinsic viscosity [η] measured in decalin solvent at 135°C of preferably 0.5 dl / g to 4.0 dl / g, more preferably 0.6 dl / g to 3.5 dl / g, and even more preferably 0.8 dl / g to 3.0 dl / g.

[0020] The 4-methyl-1-pentene polymer has a molecular weight distribution (Mw / Mn), which is the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) measured by gel permeation chromatography (GPC), of preferably 1.0 to 7.0, more preferably 1.2 to 6.0, and even more preferably 1.5 to 5.0.

[0021] The 4-methyl-1-pentene polymer preferably has a density of 820 kg / m 3 ~860kg / m 3 , more preferably 825 kg / m 3 ~850kg / m 3 is in the range.

[0022] The 4-methyl-1-pentene polymer can be produced, for example, by polymerizing 4-methyl-1-pentene and, if necessary, an α-olefin having 2 to 20 carbon atoms (excluding 4-methyl-1-pentene). Alternatively, it may be produced by thermally decomposing a high molecular weight 4-methyl-1-pentene polymer. The 4-methyl-1-pentene polymer may be purified by solvent fractionation, which separates the polymers based on the difference in solubility in a solvent, or molecular distillation, which separates the polymers based on the difference in boiling point.

[0023] The 4-methyl-1-pentene polymer can be obtained by polymerizing 4-methyl-1-pentene and, if necessary, an α-olefin having 2 to 20 carbon atoms (excluding 4-methyl-1-pentene) using a conventionally known olefin polymerization catalyst, such as a vanadium-based catalyst, a titanium-based catalyst, a magnesium-supported titanium catalyst, or the metallocene catalysts described in WO 01 / 53369, WO 01 / 27124, JP-A 3-193796, or JP-A 2-41303. In addition, commercially available 4-methyl-1-pentene polymers can be used, and examples thereof include TPX (registered trademark) manufactured by Mitsui Chemicals, Inc.

[0024] The resin composition (A) may or may not contain components other than the 4-methyl-1-pentene polymer. Examples of components other than the 4-methyl-1-pentene polymer that may be contained in the resin composition (A) include coloring materials (e.g., pigments or dyes), weather stabilizers, ultraviolet absorbers, antistatic agents, antislip agents, antiblocking agents, antifogging agents, crystal nucleating agents, lubricants, antioxidants, hydrochloric acid absorbers, fillers, foaming agents, crosslinking agents, crosslinking aids, adhesives, softeners, and flame retardants.

[0025] The content of the 4-methyl-1-pentene polymer in the resin composition (A) is preferably 80% by mass or more, more preferably 85% by mass or more, even more preferably 90% by mass or more, and still more preferably 95% by mass or more, based on the total amount of the resin composition (A).

[0026] (melt spinning) In step (1), the resin composition (A) is melt-spun under temperature conditions such that the maximum temperature reaches a range of (Tx+10)°C to (Tx+130)°C to obtain filaments. In step (1), the resin composition (A) is preferably melt-spun under temperature conditions such that the maximum temperature reaches a range of 235°C to 350°C to obtain filaments.

[0027] The diameter of the filament obtained in step (1) is preferably 1.00 mm to 10.00 mm. The lower limit of the filament diameter is more preferably 1.00 mm, even more preferably 1.50 mm, and even more preferably 1.60 mm. The upper limit of the filament diameter is more preferably 4.00 mm, even more preferably 3.50 mm, and even more preferably 3.00 mm. Here, the diameter of the filament means the diameter of the cross section of the filament equivalent to a circle.

[0028] The roundness of the filament obtained in step (1) is preferably 1.000 to 1.200, more preferably 1.000 to 1.100, since it is easy to obtain a three-dimensional shaped product with excellent appearance and surface properties. The closer the circularity is to 1.000, the closer the cross section of the filament is to a perfect circle. Here, the circularity of the filament is a value obtained by the following method. Ten measurement points are set at 3 cm intervals along the length of the filament, and the long and short diameters of the filament are measured at each measurement point. The ratio of the short diameter to the long diameter is calculated, and the average of the ratios of the long diameter to the short diameter at the 10 measurement points is taken as the circularity of the filament.

[0029] In the melt spinning in step (1), for example, the resin composition (A) is fed into an extruder (for example, a single-screw extruder or a twin-screw extruder), and then extruded as a molten strand from a die hole of the extruder. The obtained molten strand is cooled to obtain a strand, and the obtained strand is stretched to obtain a filament. In this case, the maximum temperature of the resin composition (A) is the maximum temperature that can be reached in each cylinder of the extruder. The molten strand is cooled by air drying and / or in a water bath. When in a water bath, the water temperature is preferably in the range of 5°C to 60°C, more preferably 7°C to 50°C, and even more preferably 10°C to 40°C, although it depends on the diameter of the desired filament.

[0030] By stretching the strand as described above, the molecular chains can be oriented in a direction parallel to the pulling direction, and the tensile strength and toughness of the resulting filament can be improved. The above-mentioned strand drawing is carried out, for example, by adjusting the speed ratio (draw ratio) between the take-up roll on the inlet side and the take-up roll on the outlet side of the drawing device. The draw ratio of the above-mentioned strand is preferably 2 to 15 times.

[0031] The strand is usually stretched under heating. Heating during stretching may be carried out using any of a hot water bath, an oven, a heated roll, etc., without any particular limitation, but it is preferable to use a hot water bath from the viewpoint of more uniform stretching. The stretching using a hot water bath can be carried out, for example, by using a water bath having a length and depth that allow the water temperature to be adjusted, and take-up rolls disposed before and after the water bath. Stretching using an oven can be carried out, for example, using an electric heater (infrared heater) as a heat source arranged in the take-up direction, an oven with a length that allows the temperature to be adjusted, and take-up rolls arranged before and after the oven. Stretching using a heated roll can be carried out by, for example, installing multiple take-up rolls whose temperatures are controlled by water pipes, oil pipes, and electric heaters disposed inside, and adjusting the rotation speed of these take-up rolls.

[0032] When the 4-methyl-1-pentene polymer has both a melting point (Tm) (°C) and a glass transition temperature (Tg) (°C), the heating temperature during stretching is preferably Tg to Tm, more preferably Tg to Tm-30°C, and even more preferably Tg to Tm-60°C.

[0033] The draw ratio of the strand is preferably 2 to 15 times, more preferably 3 to 12 times, and even more preferably 4 to 10 times. The strand may be stretched in a single-stage stretching process or in a multi-stage stretching process. When multi-stage stretching is performed, the stretching ratio may be changed sequentially, for example, 1.1 to 10 times in the first stage and 1.5 to 12 times in the second stage. It is preferable that the heating temperature during stretching is lowest in the first stage and is successively increased with each additional stage.

[0034] In step (1), the obtained filament may be heat-treated (heat-set). This makes it possible to suppress changes in physical properties (for example, shrinkage) at high temperatures. The temperature for the heat treatment is, for example, 20°C to 140°C, and preferably 30°C to 120°C. When the 4-methyl-1-pentene polymer in the resin composition (A) used as the raw material for the filaments has both a melting point (°C) and a glass transition temperature (°C), the temperature of the heat treatment may be in the range of the glass transition temperature (°C) to the melting point (°C). As in the case of the stretching operation, the heat treatment may be carried out using any method such as a water bath, an oven, or a heated roll, and there is no limitation thereto.

[0035] In step (1), the obtained filament may be heat-treated (heat-set) and then cooled in a cooling bath. The cooling method may be either water cooling or air cooling, and there is no limitation.

[0036] <Process (2)> The method for producing a filament according to the present disclosure may further include a step (2) of winding the filament after the above-described step (1). The winding process involves winding the filament onto a cartridge, bobbin, or cone using a winding machine, for example, to obtain a roll of filament.

[0037] The winding speed is preferably 0.05 kg / h to 100 kg / h.

[0038] [Method for manufacturing 3D objects] The method for manufacturing a three-dimensional object according to the present disclosure includes: obtaining a filament by the filament manufacturing method described above; a step of performing 3D modeling using a filament by a thermal fusion method to obtain a 3D model; Includes.

[0039] As described above, the step of obtaining a filament in the method for producing a three-dimensionally shaped object according to the present disclosure makes it possible to obtain a filament with excellent accuracy (i.e., dimensional accuracy and shape accuracy) and with reduced bubbles and burning. In the step of obtaining a three-dimensional object in the method of manufacturing a three-dimensional object according to the present disclosure, such filaments are used to perform three-dimensional modeling by a thermal fusion method to obtain a three-dimensional object. This allows for the production of a three-dimensional object with excellent appearance.

[0040] <Process for obtaining filaments> For the process of obtaining the filament, reference can be made to the above-described method for producing the filament of the present disclosure.

[0041] <Process for obtaining 3D objects> In the process of obtaining a three-dimensional object, a filament is used to perform three-dimensional modeling using a thermal fusion method, thereby obtaining a three-dimensional object. The process for obtaining a three-dimensional object preferably includes a melting process in which the above-mentioned filament is melted as a three-dimensional object composition, and a modeling process in which the molten three-dimensional object composition is extruded from the nozzle of a three-dimensional printer to form a model.

[0042] (Melting process) In the melting step, the filament as the composition for three-dimensional modeling is melted. The heating means for melting the composition for three-dimensional modeling is not particularly limited, and known heating means can be used. In the melting step, it is preferable to use a three-dimensional printer equipped with a heating means such as an electric heater. The temperature at which the composition for three-dimensional modeling is melted is preferably set according to the properties of the 4-methyl-1-pentene polymer contained in the filament as the composition for three-dimensional modeling, and is preferably (Tx + 10)°C to (Tx + 150)°C, more preferably (Tx + 20)°C to (Tx + 130)°C, and even more preferably (Tx + 30)°C to (Tx + 100)°C.

[0043] In the melting step, for example, the filaments of the composition for three-dimensional modeling may be melted and kneaded.

[0044] (modeling process) In the modeling process, the 3D modeling composition melted in the melting process is extruded from the nozzle of a 3D printer to form a model. [Example]

[0045] Examples of the present disclosure will be shown below, but the present disclosure is not limited to the following examples.

[0046] <Filament manufacturing> As a pellet-shaped resin composition containing a 4-methyl-1-pentene polymer, TPX (registered trademark) MX002O manufactured by Mitsui Chemicals, Inc. was prepared. This resin composition contains a 4-methyl-1-pentene polymer having a melting point of 224°C (i.e., Tx of 224°C). This resin composition MX002O was charged into the hopper of a filament extruder (manufactured by 3devo) and melt-spun to produce filaments, which were then wound up at a winding speed of 0.13 kg / h. The melt spinning conditions were as follows: single screw extrusion speed 4.0 rpm, cylinder 4 temperature 240°C, cylinder 3 temperature 240°C, cylinder 2 temperature 240°C, cylinder 1 temperature 240°C, and target diameter 7.0 mm. Here, the cylinders are arranged in the following order from the upstream side in the direction of resin flow: cylinder 4, cylinder 2, cylinder 2, cylinder 1. In this Example 1, the maximum temperature of the resin composition during melt spinning is 240°C. The target diameter was also adjusted by the melt temperature and / or the rotation speed of the extruder.

[0047] <Evaluation> The obtained filaments were subjected to the following evaluations. The results are shown in Table 1.

[0048] (dimensional accuracy) Ten measurement points were set at 10 cm intervals along the length of the obtained filament. At each measurement point, the major axis of the cross section of the filament was measured, and the average of the major axes at the 10 measurement points was taken as the actual measured diameter of the filament. Based on the obtained measured diameter and the target diameter, the dimensional accuracy was evaluated according to the following evaluation criteria.

[0049] -Evaluation criteria for dimensional accuracy- A: The deviation (i.e., difference) of the measured diameter from the target diameter was within 10% of the target diameter, and the dimensional accuracy was excellent. B: The deviation (i.e., difference) of the measured diameter from the target diameter was more than 10% of the target diameter, and the dimensional accuracy was poor.

[0050] (Circularity (shape accuracy)) Ten measurement points were set at 3 cm intervals along the length of the obtained filament. At each measurement point, the major axis and minor axis of the filament were measured, and the major axis / minor axis ratio was calculated. The average ratio of the major axis to the minor axis at 50 measurement points was taken as the roundness. The closer the circularity is to 1.0, the closer the cross-sectional shape of the filament is to a perfect circle (i.e., the more excellent the shape precision is).

[0051] (bubbles) The obtained filaments were visually observed and evaluated according to the following criteria. A: No air bubbles are visible in the filament. B: Air bubbles were observed in the filament.

[0052] (burnt) The obtained filaments were visually observed and evaluated according to the following criteria. A: No burns (i.e., black spots and / or black streaks) are observed on the filament. B: Burns (i.e., black spots and / or black streaks) are observed on the filament.

[0053] [Examples 2 to 5, Comparative Examples 1 and 2] The same procedure as in Example 1 was carried out except that the filament production conditions were changed as shown in Table 1. The results are shown in Table 1.

[0054] [Table 1]

[0055] As shown in Table 1, in Examples 1 to 5, filaments were obtained by melt spinning a resin composition containing a 4-methyl-1-pentene polymer under temperature conditions such that the maximum temperature reached was in the range of (Tx + 10)°C to (Tx + 130)°C (Tx in these Examples is the melting point (°C) of the 4-methyl-1-pentene polymer). The filaments produced had excellent dimensional accuracy and shape accuracy, and bubbles and burning during filament production were suppressed. In contrast to this, in Comparative Example 1, in which the maximum temperature reached was less than (Tx+10)°C, the dimensional accuracy decreased. Furthermore, in Comparative Example 2, in which the maximum temperature reached was more than (Tx+130)°C, the dimensional accuracy decreased and bubbles were generated.

Claims

1. A method for producing a filament, comprising: (1) melt-spinning a resin composition containing a 4-methyl-1-pentene polymer under temperature conditions such that the maximum temperature reaches a range of (Tx+10)°C to (Tx+130)°C (here, Tx means the melting point (°C) when the 4-methyl-1-pentene polymer has both a melting point (°C) and a glass transition temperature (°C); and Tx means either the melting point (°C) or the glass transition temperature (°C) when the 4-methyl-1-pentene polymer has only one of the melting point (°C) and the glass transition temperature (°C)).

2. 2. The method for producing a filament according to claim 1, wherein in the step (1), the resin composition is melt-spun under temperature conditions such that the maximum temperature reaches a range of 235°C to 350°C to obtain a filament.

3. The method for producing a filament according to claim 1 , further comprising, after step (1), step (2) of winding the filament.

4. 4. The method for producing a filament according to claim 3, wherein in the step (2), the filament is wound at a speed of 0.05 kg / h to 100 kg / h.

5. The method for producing a filament according to claim 1, wherein the filament has a diameter of 1.00 mm to 10.00 mm.

6. 2. The method for producing a filament according to claim 1, wherein the content of the 4-methyl-1-pentene polymer in the resin composition is 90 mass% or more with respect to the total amount of the resin composition.

7. A step of obtaining a filament by the filament manufacturing method according to any one of claims 1 to 6; performing three-dimensional modeling by a thermal fusion method using the filament to obtain a three-dimensional model; A method for manufacturing a three-dimensional object, comprising:

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