Textiles

Abstract

To improve the handling properties of fibers. [Solution] The textile product comprises fibers and a liquid in an amount that is added to the fibers and is capable of suppressing the scattering of the fibers.

Description

Technical Field

[0001] The present disclosure relates to a textile, a method for manufacturing a textile, a composite material, and a method for manufacturing a composite material.

Background Art

[0002] Fiber reinforced plastics obtained by compounding and reinforcing fibers such as carbon fibers with resin are widely used. Many commercially available carbon fibers have a sizing agent (bundling agent) applied to their surfaces in order to improve handling properties and processability (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in recycled carbon fibers obtained by recycling carbon fiber reinforced plastics, the sizing agent may be removed during the recycling process. Recycled carbon fibers from which the sizing agent has been removed are bulky, making it difficult to handle them during transportation, storage, and feeding into a kneader, and there is a problem that they can easily scatter in the air and affect the human body and electronic devices.

[0005] The present disclosure has been made in view of such problems, and an object thereof is to improve the handling properties of fibers.

Means for Solving the Problems

[0006] In order to solve the above problems, a textile according to an aspect of the present disclosure includes fibers and a liquid added to the fibers in an amount capable of suppressing the scattering of the fibers.

[0007] Another aspect of this disclosure is also a textile product. This textile product comprises fibers and a liquid added to the fibers. The discharge rate of a feeder supplying the textile product to a melting and kneading machine is set to 5.6 g per minute, and a dust collector installed near the discharge position is used to remove 3.5 m of liquid from a 3-inch diameter suction port located 200 mm away from the discharge position. 3 When dust is collected for 10 minutes at this suction airflow rate, the weight of fibers attached to the filter installed at the intake port is less than 0.04g.

[0008] A further aspect of this disclosure is a method for manufacturing a textile product. This method comprises the step of adding a liquid to the fibers in an amount that is sufficient to suppress the scattering of the fibers.

[0009] Another aspect of this disclosure is a composite material comprising a matrix and fibers regenerated from a fiber-reinforced composite material. The fibers are dispersed in the matrix and do not contain any residue of the matrix of the fiber-reinforced composite material prior to regeneration.

[0010] Another aspect of the present disclosure is a method for producing a composite material. This method comprises the step of melting and kneading a matrix material and fibers to which a liquid has been added. [Effects of the Invention]

[0011] According to this disclosure, the handling properties of fibers can be improved. [Brief explanation of the drawing]

[0012] [Figure 1] This is a photograph of the recycled carbon fiber from Comparative Example 1, which contains resin residue. [Figure 2] This is a photograph of the recycled carbon fiber from Comparative Example 2, which contains resin residue. [Figure 3] This is a photograph of the recycled carbon fibers from Example 1 after the resin residue has been removed. [Figure 4] Figure 4(a) is an electron microscope image of the recycled carbon fiber of Comparative Example 1, and Figure 4(b) is a magnified view thereof. [Figure 5]Fig. 5(a) is an electron micrograph of the recycled carbon fiber of Comparative Example 2, and Fig. 5(b) is an enlarged view thereof. [Figure 6] Fig. 6(a) is an electron micrograph of the recycled carbon fiber of Example 1, and Fig. 6(b) is an enlarged view thereof. [Figure 7] Figs. 7(a) and (b) are photographs of the fibrous product obtained by adding water to the recycled carbon fiber of Example 1. [Figure 8] Photograph of the pellet of the composite material of Comparative Example 1. [Figure 9] Fig. 9(a) is a photograph of the pellet of the composite material of Comparative Example 2, and Fig. 9(b) is an enlarged view thereof. [Figure 10] Photograph of the pellet of the composite material of Example 1. [Figure 11] Fig. 11(a) is an electron micrograph of the pellet of the composite material of Comparative Example 1, and Fig. 11(b) is an enlarged view thereof. [Figure 12] Fig. 12(a) is an electron micrograph of the pellet of the composite material of Comparative Example 2, and Fig. 12(b) is an enlarged view thereof. [Figure 13] Fig. 13(a) is an electron micrograph of the pellet of the composite material of Example 1, and Fig. 13(b) is an enlarged view thereof. [Figure 14] Table showing the results of the bending test. [Figure 15] Graph showing the bending strength of each test piece. [Figure 16] Graph showing the bending modulus of elasticity of each test piece. [Figure 17] Photograph of the filter after the experiment for evaluating the fiber dispersibility. [Figure 18] Table showing the weight of the fibers adhered to the filter.

Mode for Carrying Out the Invention

[0013] As mentioned above, recycled carbon fibers from which sizing agents have been removed during the regeneration process can present problems such as bulkiness and scattering. In particular, since carbon fibers are conductive, if scattered carbon fibers adhere to the circuit boards of electronic devices, they can cause short circuits and malfunctions.

[0014] To address these issues, some of the resin that forms the base material of the carbon fiber reinforced plastic before recycling is sometimes left in place to function as a sizing agent.

[0015] However, when recycled carbon fibers containing resin residue are combined with thermoplastic resins or other materials to manufacture composite materials, there is a possibility that the resin residue and carbon fibers may aggregate and form clumps. Furthermore, when recycled carbon fibers are combined with thermoplastic resins or other materials different from the resin residue to manufacture composite materials, the presence of different types of resins may affect the properties of the composite material.

[0016] To address these challenges, the inventors discovered that adding a liquid such as water to fibers that do not contain sizing agents or resin residues can reduce the bulkiness and scattering of the fibers. This reduces fiber scattering, thereby minimizing the impact of scattered fibers on humans, animals, electronic devices, etc. Furthermore, by reducing the bulkiness of the fibers, handling during transportation, storage, and use can be improved. In addition, since there is no need to apply sizing agents to the surface of the carbon fibers, the manufacturing cost of the carbon fibers can be reduced.

[0017] [Textiles] The textile product according to the embodiment of the present disclosure comprises fibers and a liquid in an amount that is added to the fibers and is capable of suppressing the scattering of the fibers.

[0018] The fibers may be of any type and may include at least one of carbon fibers, glass fibers, metal fibers, rock fibers, natural fibers, and synthetic fibers. Carbon fibers may be carbon fibers produced by any raw material or manufacturing method, such as PAN-based carbon fibers or pitch-based carbon fibers. Carbon fibers may be monofilaments, filaments, regular tows, large tows, etc. Glass fibers may be glass wool, fiberglass, etc. Metal fibers may be stainless steel fibers, tungsten fibers, aluminum fibers, nickel fibers, titanium fibers, etc. Rock fibers may be rock wool, slag wool, basalt fibers, etc. Natural fibers may be plant fibers such as cotton and linen, or animal fibers such as wool and silk. Synthetic fibers may be nylon, polyester, polyurethane, polyvinyl alcohol, polyacrylonitrile, polyvinyl chloride, polypropylene, polyethylene, polystyrene, etc.

[0019] The fibers may be recycled fibers obtained by recycling fiber-reinforced composite materials such as fiber-reinforced plastics, fiber-reinforced metals, and fiber-reinforced ceramics. The fibers may not contain the matrix material of the composite material before recycling. The fibers may not be coated with a sizing agent. This makes it possible to suppress the influence of residues from the matrix material of the composite material before recycling and sizing agents on the properties of the composite material when the fibers are composited with the matrix material using the fiber product.

[0020] The average fiber length of the fibers may be 10 cm or less. The average fiber length of the fibers may be within the range of the average fiber length of typical recycled carbon fibers. The average fiber length of the fibers may be 9 cm or less, 8 cm or less, 7 cm or less, 6 cm or less, 5 cm or less, 4 cm or less, 3 cm or less, 2 cm or less, 1 cm or less, 9 mm or less, 8 mm or less, 7 mm or less, 6 mm or less, 5 mm or less, 4 mm or less, 3 mm or less, 2 mm or less, or 1 mm or less. The average fiber length of the fibers may be 1 μm or more, 5 μm or more, 10 μm or more, 15 μm or more, 20 μm or more, 25 μm or more, 30 μm or more, 35 μm or more, 45 μm or more, 50 μm or more, 60 μm or more, 70 μm or more, 80 μm or more, 90 μm or more, 100 μm or more, 200 μm or more, 300 μm or more, 400 μm or more, 500 μm or more, 600 μm or more, 700 μm or more, 800 μm or more, or 900 μm or more.

[0021] The liquid is removed by evaporation when the fibers are compounded with the base material, as the base material is heated to its melting point. The liquid may have a boiling point between room temperature and the melting point of the base material, and may also have a melting point lower than room temperature. The liquid may be water or an organic solvent. The organic solvent may be methanol, ethanol, propanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, isopropyl alcohol, isobutyl alcohol, n-hexane, benzene, chlorobenzene, xylene, cresol, toluene, tetrahydrofuran, N,N-dimethylformamide, methyl acetate, ethyl acetate, butyl acetate, ethylene glycol, polyethylene glycol, etc. The liquid may have a low surface tension that allows it to wet the surface of the fibers.

[0022] The amount of liquid added may be 0.05 to 100 parts per part of fiber. If the amount of liquid added is relatively small relative to the fiber, the fiber will become moist and its volume will decrease. If the amount of liquid added is relatively large relative to the fiber, it will become a slurry in which the fiber is suspended in the liquid. The amount of liquid added may be adjusted according to the type, amount, form, and length of the fiber, the method of transporting the fiber product, the transport time, the storage method, the storage time, the method of use, the type of base material to which the fiber is compounded, the amount and concentration of fiber compounded into the base material, the method of compounding the fiber and base material, and the temperature. The amount of liquid added may be 0.05 parts or more, 0.1 parts or more, 0.15 parts or more, 0.2 parts or more, 0.25 parts or more, 0.3 parts or more, 0.35 parts or more, 0.4 parts or more, 0.45 parts or more, 0.5 parts or more, 0.6 parts or more, 0.65 parts or more, 0.7 parts or more, 0.75 parts or more, 0.8 parts or more, 0.85 parts or more, 0.9 parts or more, 0.95 parts or more, or 1 part or more per part of fiber. The amount of liquid added may be 100 parts or less, 95 parts or less, 90 parts or less, 85 parts or less, 80 parts or less, 75 parts or less, 70 parts or less, 65 parts or less, 60 parts or less, 55 parts or less, 50 parts or less, 45 parts or less, 40 parts or less, 35 parts or less, 30 parts or less, 25 parts or less, 20 parts or less, 15 parts or less, 10 parts or less, 9 parts or less, 8 parts or less, 7 parts or less, 6 parts or less, 5 parts or less, 4 parts or less, 3 parts or less, 2 parts or less, or 1 part or less per part of fiber.

[0023] Textile products may contain a dispersant to suppress the aggregation of fibers dispersed in a liquid. In particular, when a liquid with a relatively high surface tension, such as water, is added to the fibers, it is preferable to add a dispersant to the liquid to reduce the surface tension of the liquid and improve the wettability with the fibers. This suppresses the aggregation of fibers during transportation and storage of the textile product and maintains the state in which the fibers are dispersed in the liquid. As a dispersant, surfactant-type dispersants including anionic surfactants such as fatty acid salts, nonionic surfactants such as fatty acid diethanolamides, cationic surfactants such as alkyltrimethylammonium salts, amphoteric surfactants such as alkylcarboxybetaine, polymer-type dispersants including anionic high molecular weight dispersants such as polyacrylates, nonionic high molecular weight dispersants such as polyvinyl alcohol, and cationic high molecular weight dispersants such as polyethyleneimine may be added to the liquid.

[0024] The textile product may contain a thickening agent to suppress the sedimentation of fibers dispersed in the liquid. This prevents the fibers from settling during transport or storage of the textile product and maintains the fibers in a dispersed state in the liquid. Examples of thickening agents that may be added to the liquid include aluminum 2-ethylhexanoate, 1,3,5-benzenetricarboxamide, cis-1,3,5-cyclohexanetricarboxamide, 5-aminoisophthalic acid derivatives, hydroxypropyl cellulose, carboxymethyl cellulose, and sodium alginate.

[0025] The textile product according to the embodiment of this disclosure may have reduced fiber scattering. Fiber scattering is reduced by setting the discharge rate of the feeder that supplies the textile product to the melting and kneading machine to 5.6 g per minute, and using a dust collector installed near the discharge position, 3.5 m per minute is drawn from a 3-inch diameter suction port located 200 mm away from the discharge position. 3The weight of fibers adhering to the filter installed at the intake port when dust is collected for 10 minutes at the specified suction airflow may be used as an indicator for evaluation. The above indicator may be less than 0.04g. The above indicator may be 0.035g or less, 0.03g or less, 0.025g or less, 0.02g or less, 0.015g or less, 0.01g or less, 0.005g or less, or 0.001g or less.

[0026] [Manufacturing methods for textile products] A method for manufacturing a textile product according to an embodiment of the present disclosure comprises the step of adding a liquid to the fibers in an amount that is sufficient to suppress the scattering of the fibers.

[0027] If the fibers contain sizing agents or resin residues, the method for manufacturing the fiber product may include a step to remove impurities such as sizing agents or resin residues before the step of adding the liquid. This can suppress the effects caused by impurities. In the step of removing impurities, the fibers containing impurities may be heat-treated.

[0028] A method for manufacturing textile products may include a step of adding a liquid, followed by a step of stirring the liquid to disperse the fibers in the liquid. This allows for the loosening and dispersion of aggregated fibers.

[0029] [Composite materials] The composite material according to the embodiments of this disclosure comprises a matrix and fibers regenerated from a fiber-reinforced composite material, wherein the fibers are dispersed in the matrix and the material does not contain any residue of the matrix of the fiber-reinforced composite material before regeneration.

[0030] The base material may include at least one of resin, ceramics, and metal. The resin may be any type of thermoplastic resin, such as polyethylene, polytetrafluoroethylene, polypropylene, polyvinyl chloride, polystyrene, polyvinyl acetate, polyurethane, acrylic resin, methacrylic resin, polyamide (nylon), polyimide, polyacetal, polycarbonate, modified polyphenylene ether (PPE), polyester, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyphenylene sulfide, polyvinyl alcohol, etc. The ceramics may be oxides such as alumina, mullite, zirconia, and barium titanate, hydroxides such as hydroxyapatite, carbides such as silicon carbide, nitrides such as silicon nitride, and halides such as fluorite, etc. The metal may be aluminum, magnesium, titanium, stainless steel, etc.

[0031] When the base material is a resin, the composite material may be manufactured by melt kneading using a single-screw extruder or a twin-screw extruder. In this case, the composite material may be in the form of pellets or the like. The composite material may also be manufactured by impregnating molten resin into fibers formed into a sheet, such as a nonwoven fabric. In this case, the composite material may be in the form of a sheet or the like. The composite material may be a molded product of any shape.

[0032] When the base material is ceramic, the composite material may be manufactured by molding a mixture of ceramic raw material powder and fibers, and then sintering the resulting molded body. The composite material may be a molded product of any shape.

[0033] When the base material is metal, the composite material may be manufactured by molding a mixture of metal powder and fibers and sintering the resulting molded body. The composite material may also be manufactured by dispersing fibers in molten metal. The composite material may be a molded product of any shape.

[0034] The amount of matrix material residue from the fiber-reinforced composite material before regeneration only needs to be reduced to an extent that does not affect the properties of the composite material after regeneration, and it is not required that it be completely undetectable by methods such as elemental analysis, spectroscopic analysis, or electron microscopy. For example, the recycled carbon fibers shown in Figures 6(a) and 6(b) in the examples described later were obtained by heat-treating recycled carbon fibers containing resin residue at 500°C for 1 hour to remove the resin residue, but they still contain trace amounts of resin residue that could not be completely removed. When the composite material of this disclosure is said to "not contain matrix material residue from the fiber-reinforced composite material before regeneration," it means that it does not contain an amount of matrix material residue that would remain in recycled fibers obtained by conventional methods of regenerating fiber-reinforced composite materials, and also includes cases where an amount of matrix material residue remains even after removing the matrix material residue remaining in the recycled fibers by general methods. The amount of matrix material residue from the fiber-reinforced composite material before regeneration contained in the fibrous product of this disclosure may be expressed as the area ratio of matrix material residue to fibers in the scanning electron microscope image of the fibrous product, as shown in Figures 6(a) and 6(b). The area of ​​the matrix material residue may be 1% or less, 0.9% or less, 0.8% or less, 0.7% or less, 0.6% or less, 0.5% or less, 0.4% or less, 0.3% or less, 0.2% or less, 0.1% or less, 0.05% or less, 0.01% or less, 0.005% or less, 0.001% or less, 0.0005% or less, or 0.0001% or less of the area of ​​the fibers. For example, when the area ratio of matrix material residue to fibers in scanning electron microscope images of the textile products shown in Figures 6(a) and 6(b) was calculated, the average was 0.7%. The area ratio of matrix material residue to fibers in scanning electron microscope images generally corresponds to the volume ratio of matrix material residue to fibers in the textile product. Similarly, the amount of matrix material residue of the fiber-reinforced composite material before regeneration contained in the composite material of this disclosure may be expressed as the area ratio of matrix material residue to fibers in the scanning electron microscope image of the composite material, as shown in Figures 13(a) and 13(b). The area of ​​the matrix material residue may be 1% or less, 0.9% or less, 0.8% or less, 0.7% or less, 0.6% or less, 0.5% or less, 0.4% or less, 0.3% or less, 0.2% or less, 0.1% or less, 0.05% or less, 0.01% or less, 0.005% or less, 0.001% or less, 0.0005% or less, or 0.0001% or less of the area of ​​the fibers. For example, in the scanning electron microscope image of the composite material shown in Figures 13(a) and 13(b), no matrix material residue is visible, and the area ratio of matrix material residue to fibers is approximately 0.The amount of matrix material residue of the fiber-reinforced composite material before recycling included in the composite material of this disclosure may be expressed as a weight ratio of matrix material residue in the composite material, and the weight of the matrix material residue may be 1% by weight or less, 0.5% by weight or less, 0.1% by weight or less, 0.05% by weight or less, 0.01% by weight or less, 0.005% by weight or less, 0.001% by weight or less, 0.0005% by weight or less, or 0.0001% by weight or less, based on the total weight of the composite material after recycling. For example, if a composite material containing 30% by weight of recycled carbon fiber is manufactured using recycled carbon fiber containing 1% by weight of matrix material residue, the weight ratio of matrix material residue in the composite material will be 0.3% by weight.

[0035] [Method for manufacturing composite materials] A method for manufacturing a composite material according to an embodiment of the present disclosure comprises the step of compounding a base material with fibers to which a liquid has been added. The method for compounding the base material and the fibers may be appropriately selected depending on the type of base material, as described above.

[0036] When fibers are compounded with a molten base material, the liquid is removed by evaporation at the temperature at which the base material melts. In the manufacturing method of the composite material, the gas produced by the evaporation of the liquid may be degassed during the compounding step. For example, when the base material and fibers are melt-kneaded using a kneader, the gas produced by the evaporation of the liquid inside the kneader may be degassed to the outside through the kneader's degassing port. This allows for the rapid removal of the liquid, thereby reducing the cost, time, and energy required for the manufacturing of the composite material. Degassing may be performed by reducing the pressure using a vacuum pump, vacuum pump, aspirator, ejector, etc. The degassed gas may be recovered and reused.

[0037] A method for manufacturing a composite material may include a step of reducing the amount of liquid before the compounding step. While it is possible to add a larger amount of liquid to prevent evaporation and loss during transportation and storage of the textile product of this disclosure, introducing a large amount of liquid into a kneader or similar device requires significant time and energy to evaporate it. Therefore, reducing the amount of liquid before compounding can reduce the cost, time, and energy required to manufacture the composite material. In the step of reducing the amount of liquid, the amount of liquid may be adjusted according to the fiber content in the composite material. For example, when manufacturing a composite material with a high fiber content, the amount of liquid may be reduced to increase the fiber content in the textile product. Conversely, when manufacturing a composite material with a low fiber content, the amount of liquid may be increased to decrease the fiber content in the textile product.

[0038] The method for introducing the liquid-added fibers into a kneader or similar device is arbitrary, but may be appropriately selected depending on the ratio of liquid to fiber, the type, form, and quantity of fiber, the fiber length, and the type and quantity of liquid. If the proportion of liquid is relatively small, the fibers may be introduced from a feeder or hopper. If the proportion of liquid is relatively large, the fibers may be introduced using a liquid transfer pump, or the liquid containing the fibers may be dripped into a feeder or similar device.

[0039] [Examples] Figure 1 is a photograph of the recycled carbon fibers of Comparative Example 1, which have resin residue. Figure 2 is a photograph of the recycled carbon fibers of Comparative Example 2, which also have resin residue. Figure 3 is a photograph of the recycled carbon fibers of Example 1, from which the resin residue has been removed. Comparative Example 1 consists of recycled carbon fibers with an average fiber length of 6 mm, which are finely bundled due to the resin residue. Comparative Example 2 consists of recycled carbon fibers with an average fiber length of 6 mm, which are coarsely bundled due to the resin residue. In Example 1, recycled carbon fibers with an average fiber length of 6 mm were heat-treated at 500°C for 1 hour to remove the resin residue. The recycled carbon fibers of Example 1 are fuzzy due to the removal of the resin residue.

[0040] Figure 4(a) is an electron microscope image of the recycled carbon fiber of Comparative Example 1, and Figure 4(b) is a magnified view thereof. Figure 5(a) is an electron microscope image of the recycled carbon fiber of Comparative Example 2, and Figure 5(b) is a magnified view thereof. Figure 6(a) is an electron microscope image of the recycled carbon fiber of Example 1, and Figure 6(b) is a magnified view thereof. Resin residue was attached to the recycled carbon fibers of Comparative Example 1 and Comparative Example 2, but it was confirmed that the resin residue was almost completely removed from the recycled carbon fiber of Example 1.

[0041] Figure 7(a) is a photograph of the fiber product obtained by adding 1 part water to 1 part recycled carbon fiber from Example 1. The bulkiness and scattering of the recycled carbon fiber are suppressed. Figure 7(b) is a photograph of the fiber product obtained by adding even more water. The fiber product has become a fluid slurry, and the bulkiness and scattering of the recycled carbon fiber are suppressed.

[0042] Polyamide 6 (Toray Amiran CM1017), the recycled carbon fibers from Comparative Example 1 and Comparative Example 2, and the fiber product from Example 1 were kneaded using a twin-screw extruder to produce pellets of a composite material. Recycled carbon fibers were fed in from a side feeder so that their content was 30% by weight based on the total weight of the composite material.

[0043] Figure 8 is a photograph of the composite material pellets of Comparative Example 1. Figure 9(a) is a photograph of the composite material pellets of Comparative Example 2, and Figure 9(b) is a magnified view thereof. Figure 10 is a photograph of the composite material pellets of Example 1. The composite material pellets of Comparative Example 2 contain lumpy pieces.

[0044] Figure 11(a) is an electron microscope image of the composite material pellet of Comparative Example 1, and Figure 11(b) is a magnified view thereof. Figure 12(a) is an electron microscope image of the composite material pellet of Comparative Example 2, and Figure 12(b) is a magnified view thereof. Figure 13(a) is an electron microscope image of the composite material pellet of Example 1, and Figure 13(b) is a magnified view thereof. It was confirmed that the composite material pellets of Comparative Example 1 and Comparative Example 2 contained clumps of resin residue and recycled carbon fibers, but these were not present in the composite material pellet of Example 1.

[0045] Using an injection molding machine, test specimens were prepared of polyamide 6 without carbon fibers, a composite material containing milled carbon fibers, the composite material of Comparative Example 1, the composite material of Comparative Example 2, and the composite material of Example 1. Bending tests were performed according to the ISO 14125 standard. Figure 14 shows the results of the bending tests. Figure 15 shows the bending strength of each test specimen. Figure 16 shows the bending modulus of each test specimen. It was confirmed that the composite material of Example 1, which contains recycled carbon fibers from which resin residue has been removed, showed improved bending strength and bending modulus.

[0046] As an indicator of fiber dispersion, a dust collector installed near the discharge point of the feeder that supplies the fiber product to the melting and kneading machine collects 3.5 m³ of dust per minute from a 3-inch diameter intake located 200 mm away from the discharge point. 3 The weight of fibers adhering to the filter installed at the intake port was measured when dust was collected for 10 minutes at the specified suction airflow rate. Experiments were conducted on the recycled carbon fibers of Comparative Example 1 and Comparative Example 2, and the fibrous product of Example 2. The fibrous product of Example 2 was prepared by adding 0.61 parts of water to 1 part of recycled carbon fiber with an average fiber length of 3.5 mm. Figure 17 is a photograph of the filter after the experiment. Figure 18 shows the weight of the fibers adhering to the filter. In the recycled carbon fibers of Comparative Example 1 and Comparative Example 2, scattered recycled carbon fibers adhered to the filter, but in the fibrous product of Example 1, the recycled carbon fibers did not adhere to the filter. It was confirmed that the scattering properties of the fibrous product of this embodiment were suppressed.

[0047] The present disclosure has been explained above based on examples. These examples are illustrative, and it will be understood by those skilled in the art that various modifications are possible in combinations of their components and processing processes, and that such modifications are also within the scope of the present disclosure.

Claims

1. Fibers and, A liquid in an amount that can be added to the aforementioned fibers to suppress the scattering of the aforementioned fibers, Textile products equipped with these features.

2. The liquid comprises at least one of water and an organic solvent. The textile article according to claim 1.

3. The amount of the liquid added is 0.05 to 100 parts per part of the fiber. The textile article according to claim 1.

4. The average fiber length of the aforementioned fibers is 10 cm or less. The textile article according to claim 1.

5. The liquid comprises a dispersant for suppressing aggregation of the fibers dispersed in the liquid. The textile article according to claim 1.

6. The liquid comprises a thickening agent for suppressing the sedimentation of the fibers dispersed in the liquid. The textile article according to claim 1.

7. The aforementioned fiber includes at least one of carbon fiber, glass fiber, metal fiber, rock fiber, natural fiber, and synthetic fiber. A textile article according to any one of claims 1 to 6.

8. Textile products, Fibers and The liquid added to the aforementioned fibers, Equipped with, The feeder supplying the aforementioned fiber product to the melting and kneading machine is set to discharge 5.6 g per minute, and a dust collector installed near the discharge position collects 3.5 m of dust per minute from a 3-inch diameter suction port located 200 mm away from the discharge position. ３ When dust is collected for 10 minutes at the specified suction airflow rate, the weight of the fibers adhering to the filter installed at the intake port is less than 0.04 g. Textile products.

9. The process includes adding a liquid to the fibers in an amount sufficient to suppress the scattering of the fibers. A method for manufacturing textile products.

10. The step of adding the liquid includes a step of heating the fibers containing impurities to remove the impurities before adding the liquid. The method according to claim 9.

11. The step of adding the liquid is followed by a step of stirring the liquid to disperse the fibers in the liquid. The method according to claim 10.

12. Base material and, Fibers recycled from fiber-reinforced composite materials, Includes, The aforementioned fibers are dispersed in the base material. Does not contain residue from the matrix material of the fiber-reinforced composite material before recycling. Composite material.

13. The base material includes at least one of resin, ceramics, and metal. The composite material according to claim 12.

14. The process includes a step of compounding a base material with fibers to which a liquid has been added. A method for manufacturing composite materials.

15. In the compounding step, the fibers are compounded into the molten base material. The liquid is removed by evaporation at the temperature at which the base material melts. The method according to claim 14.

16. In the aforementioned compounding step, the gas from which the liquid has evaporated is degassed. The method according to claim 15.

17. The compounding step is preceded by a step of reducing the amount of the liquid. The method according to claim 14.

18. In the step of reducing the amount of liquid, the amount of liquid is adjusted according to the fiber content in the composite material. The method according to claim 17.

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