Method for recycling nonwoven waste material

Abstract

To provide a method for recycling nonwoven waste material composed of a plurality of different types of resins.SOLUTION: A method for recycling nonwoven waste material composed of a plurality of different types of resins includes: a crushing step in which nonwoven waste materials are crushed by a crusher; and a pelletizing step in which the crushed nonwoven waste material is pelletized by a pelletizing device. The crusher is an uniaxial crusher or a guillotine cutter, the pelletizing device is a flat die type pelletizing device, and a molding temperature in the pelletizing step is 75 to 130°C. The nonwoven waste material is crushed during the crushing step, resulting in a homogeneous mixture of different types of resin. In the pelletizing step, the nonwoven waste material is heated to a molding temperature in a state where different types of resin are uniformly mixed, and the resin with lower melting point melts, making it possible to pelletize the material.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for recycling waste nonwoven fabrics (waste nonwoven fabrics) used as interior and exterior materials for automobiles. [Background technology]

[0002] For automotive applications, nonwoven fabrics have traditionally been used as interior materials such as floor carpets to reduce weight and provide soundproofing properties, and in recent years have also begun to be used as exterior materials such as fender liners and undercovers.

[0003] Nonwoven fabrics used in automobile interior and exterior materials must be recycled under the Automobile Recycling Law. Methods for recycling nonwoven fabrics used in automobile interior materials have been known for some time, and Patent Document 1 describes a method for recycling nonwoven fabrics made of a specific resin as a method for recycling nonwoven fabrics used in automobile interior materials. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-112930 A Summary of the Invention [Problem to be solved by the invention]

[0005] In recent years, nonwoven fabrics used in automotive interior and exterior materials have come to be composed of multiple different types of resins in response to the demand for high levels of weight reduction and soundproofing performance. For this reason, the method for recycling nonwoven fabrics composed of specific resins described in Patent Document 1 has the problem that it is not possible to recycle waste nonwoven fabrics composed of multiple different types of resins in recent years.

[0006] The problem to be solved by the technology of this specification has been made in consideration of the above-mentioned points, and has an object to provide a method for recycling waste nonwoven fabrics used as interior and exterior materials for automobiles that are composed of multiple different types of resins. [Means for solving the problem]

[0007] The method for recycling nonwoven fabric waste according to an embodiment of the present specification is a method for recycling nonwoven fabric waste (nonwoven fabric waste) as an interior and exterior material for automobiles, The nonwoven fabric waste material is composed of a plurality of different types of resins, The method includes a crushing step of crushing the nonwoven fabric waste material by a crusher, and a pelletizing step of pelletizing the crushed nonwoven fabric waste material by a pelletizing device, The pellet molding apparatus is a flat die type pellet molding apparatus, and the molding temperature in the pelletizing step is 75 to 130°C.

[0008] According to the method for recycling nonwoven fabric waste materials according to the embodiment of the present specification, even if the nonwoven fabric waste material is composed of a plurality of different types of resins, the nonwoven fabric waste material is crushed in the crushing process, so that the different types of resins are uniformly mixed. In the pelletizing process, the nonwoven fabric waste material is heated to a molding temperature in a state in which the different types of resins are uniformly mixed, and the resin with a low melting point melts, making it possible to pelletize the nonwoven fabric waste material. Therefore, even if the nonwoven fabric waste material is composed of a plurality of different types of resins, it can be recycled.

[0009] Here, in the above-mentioned method for recycling nonwoven waste material, the pellets regenerated from the nonwoven waste material in the pelletizing step can be used as raw material for fibers.

[0010] This allows the nonwoven fabric waste to be recycled into fibers that can be used as the raw material for nonwoven fabric.

[0011] In the above-mentioned method for recycling nonwoven fabric waste, the pellets may be melt-spun into fibers.

[0012] In the above-mentioned method for recycling waste nonwoven fabric, the resin constituting the waste nonwoven fabric may be composed of a polyester resin and a polyolefin resin.

[0013] According to this, in the pelletizing process, the polyolefin resin having a low melting point can be melted and the polyester resin having a high melting point can be pelletized without melting, thereby suppressing a decrease in molecular weight due to thermal decomposition of the polyester resin.

[0014] In the above-mentioned method for recycling waste nonwoven fabric, the polyester resin may form fibers having a core-sheath structure, the core being made of a high-melting polyester resin and the sheath being made of a low-melting polyester resin.

[0015] According to this, in the pelletizing process, the polyolefin resin having a low melting point and the low melting point polyester resin can be melted, and the high melting point polyester resin having a high melting point can be pelletized without melting, thereby suppressing a decrease in molecular weight due to thermal decomposition of the polyester resin.

[0016] In the above-mentioned method for recycling waste nonwoven fabric, the resin constituting the waste nonwoven fabric may be composed of a high melting point polyester resin and a low melting point polyester resin.

[0017] According to this, in the pelletizing process, the low-melting point polyester resin can be melted and the high-melting point polyester resin can be pelletized without melting it, thereby suppressing a decrease in molecular weight due to thermal decomposition of the polyester resin.

[0018] In the above-mentioned method for recycling nonwoven waste material, the crusher may be a uniaxial crusher.

[0019] According to this, in the crushing process, the nonwoven waste material can be crushed so as to defibrate it, and different types of resins can be made to be uniformly mixed together.

[0020] In the above-mentioned method for recycling nonwoven waste material, the crusher may be a guillotine cutter.

[0021] According to this, in the crushing process, the nonwoven waste material can be finely cut and crushed, and different types of resins can be uniformly mixed. Effect of the Invention

[0022] According to the method for recycling nonwoven waste fabric of the embodiment, even if the nonwoven waste fabric is made of a plurality of different types of resins, it can be recycled. [Brief description of the drawings]

[0023] [Figure 1] FIG. 2 is an image diagram of the cycle of a method for recycling nonwoven fabric waste according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, a method for recycling nonwoven waste materials according to an embodiment of the present specification will be described. Note that the scope of the present invention is not limited to the scope disclosed in the embodiment. The method for recycling nonwoven waste materials according to the embodiment includes a crushing process in which nonwoven waste materials made of a plurality of different types of resins are crushed by a crusher, and a pelletizing process in which the crushed nonwoven waste materials are pelletized by a pelletizing device. The crusher is a uniaxial crusher or a guillotine cutter, the pelletizing device is a flat die type pelletizing device, and the molding temperature (die temperature) in the pelletizing process is 75 to 130°C.

[0025] As shown in Figure 1, the method for recycling nonwoven waste is as follows: nonwoven fabric used in the interior and exterior materials of automobiles is collected after the vehicles are scrapped as interior and exterior material waste. The nonwoven fabric is then processed into flakes in a crushing process, processed into resin pellets in a pelletizing process, and processed into resin fibers in a fiberizing process, and then recycled.

[0026] Resin fibers can be mixed with the skeletal and adhesive fibers that make up the nonwoven fabric and then thermoformed to be recycled as interior and exterior materials for automobiles. Thermoforming is carried out through a preliminary bonding process (nonwoven fabric production process) and a heat molding process (processing process). In the nonwoven fabric production process, the nonwoven fabric is heated to create a moldable nonwoven fabric, which is an intermediate molded product, and in the processing process, the moldable nonwoven fabric formed in the nonwoven fabric production process is integrated into a molded product (interior and exterior materials) using a mold that is matched to the installation location of the automobile.

[0027] The recycled interior and exterior waste materials can be mixed with resin fibers generated as waste materials from processing in the nonwoven fabric forming process and processing process, respectively, and the waste materials from processing can also be recycled. Note that the nonwoven fabric waste recycling method of the embodiment is configured so that even if only the waste materials from processing are used, they can be recycled into flakes, resin pellets, resin fibers, or nonwoven fabric.

[0028] Nonwoven fabrics for use as interior and exterior materials for automobiles are made of multiple different types of resins (fibers), and are made up of skeletal fibers that form the skeleton, and adhesive fibers that bond the skeletal fibers. The material of the skeletal fibers that form the skeleton can be, for example, polyester resins (high melting point polyester resins) such as PET (polyethylene terephthalate) resin and PBT (polybutylene terephthalate) resin, polyamide resin, etc. In another embodiment, it can be a polyester resin with excellent heat resistance, and in yet another embodiment, it can be a PET resin with great versatility.

[0029] The skeletal fibers constituting the nonwoven fabric can be bonded by adhesive fibers. The material constituting the adhesive fibers has a lower melting point than the material of the skeletal fibers constituting the nonwoven fabric, and examples of the material that can be used include low-melting polyester resins such as low-melting PET resin (LPET) and low-melting PBT resin (LPBT), polyethylene resin, polypropylene resin, polystyrene resin, AS (acrylonitrile styrene) resin, ABS (acrylobutadiene styrene) resin, and acrylic resin.

[0030] The skeletal fibers and adhesive fibers constituting the nonwoven fabric can be, for example, fibers having a core-sheath structure with a polyester resin in the core and a low-melting point polyester resin in the sheath. By using the skeletal fibers and adhesive fibers as fibers having a core-sheath structure, the fibers constituting the nonwoven fabric can be fused at a low temperature.

[0031] Nonwoven fabrics for automobile interior materials are multi-layered to reduce weight and provide soundproofing, and some are even equipped with a resin film such as a perforated resin layer. Materials for the resin film include, for example, polyester resin, polyamide resin, polyethylene resin, polypropylene resin, polystyrene resin, AS resin, ABS resin, and acrylic resin. The resin film is used by selecting the appropriate material to reduce weight and provide soundproofing.

[0032] Nonwoven fabrics for automobile interior materials are made by carding a mixture of skeletal fibers (including fibers with a core-sheath structure) and adhesive fibers that make up the nonwoven fabric into a web (fibrous sheet), and then needle punching the formed web to make a nonwoven fabric by entangling and bonding the fibers with tiny needle protrusions. If necessary, the nonwoven fabric can be made into a multi-layer structure with a resin film layered between the layers. The nonwoven fabric can be made into an interior material by thermoforming. Thermoforming is performed by a preliminary bonding process (nonwoven fabric production process) and a heat molding process (processing process). The preliminary bonding process heats the nonwoven fabric to make it into a moldable nonwoven fabric, which is an intermediate molded product. The heat molding process integrates the moldable nonwoven fabric formed in the preliminary bonding process into an interior material (molded product) using a mold that is matched to the installation location of the automobile.

[0033] Nonwoven fabrics as exterior materials for automobiles are used in areas where water comes into contact, and therefore require water resistance in addition to weight reduction and soundproofing. For this reason, they contain more adhesive fibers than interior materials. Nonwoven fabrics as exterior materials for automobiles are made by forming a web by carding a mixture of skeletal fibers and adhesive fibers that constitute the nonwoven fabric, or a mixture of fibers with a core-sheath structure and adhesive fibers, and then forming the web into a nonwoven fabric by needle punching, which entangles and bonds the fibers with tiny needle protrusions. The nonwoven fabric is made into an exterior material by thermoforming through a preliminary bonding process and a heat molding process, and the nonwoven fabric as an exterior material can have a higher water resistance by containing more adhesive fibers than the interior material. The water resistance can also be increased by impregnating the surface side of the nonwoven fabric with a synthetic resin. The preliminary bonding process is a process in which the nonwoven fabric is heated to form an intermediate molded body, a nonwoven fabric for molding. In the heat molding process, the moldable nonwoven fabric formed in the preliminary bonding process is integrated into an exterior material using a mold that is matched to the installation location on the automobile.

[0034] Nonwoven fabrics as interior and exterior materials for automobiles are assembled to automobiles on an automobile production line and used as a part of the automobile. The method for recycling nonwoven fabric waste according to the embodiment recycles nonwoven fabrics used for interior and exterior materials of automobiles that are collected as interior and exterior material waste after the automobile is scrapped or after the interior and exterior materials are replaced. The recycled interior and exterior material waste can be mixed with resin fibers as processing waste generated in the nonwoven process and processing process, and the processing waste can also be recycled. In the method for recycling nonwoven fabric waste according to the embodiment, even if only the processing waste is used, it is possible to recycle it into flakes, resin pellets, resin fibers, or nonwoven fabric.

[0035] The collected nonwoven fabric waste has skeletal fibers and adhesive fibers with different resin compositions, and is composed of multiple different types of resins. The collected nonwoven fabric waste is processed into flakes in a crushing process, the flakes are processed into resin pellets in a pelletizing process, the resin pellets are processed into resin fibers in a fiberizing process, and the resin fibers are recycled into nonwoven fabric in a nonwoven fabric production process. The resin pellets can also be used as solid fuel.

[0036] The crushing process is a process in which the nonwoven waste material is crushed into flakes with a crushing size of 35 mm or less by a crusher. By crushing the nonwoven waste material into flakes with a crushing size of 35 mm or less and mixing them, multiple different types of resins (fibers) can be uniformly mixed, and in the next pelletizing process, a type of resin with a low melting point can be melted, so that pelletizing can be performed well. In another embodiment, the crushing size can be 30 mm or less, and in yet another embodiment, 25 mm or less. Note that "35 mm or less" means that the outer diameter of the crushed flakes is a maximum of 35 mm or less. The crusher in the crushing process can be a single-shaft (multi-shaft) crusher or a guillotine cutter.

[0037] A single-shaft (multi-shaft) crusher (hereinafter collectively referred to as a single-shaft crusher) is a crusher that crushes nonwoven waste materials by cutting them with a rotating blade attached to a rotor shaft and a fixed blade attached to a main body that contacts the rotor shaft. The crushed nonwoven waste materials are crushed into flakes until they are large enough to pass through an outlet screen of the crushing size, and nonwoven waste materials that cannot pass through the outlet screen are crushed repeatedly until they are large enough to pass through. Examples of single-shaft crushers that can be used include the UC series, UFW series (manufactured by Uenotex Co., Ltd.), and SR series (manufactured by SSI Japan Co., Ltd.).

[0038] A guillotine cutter is a cutting machine that cuts nonwoven waste material in a direction perpendicular to the moving direction of the conveyor using an axe-shaped blade. Since the nonwoven waste material is cut into strips in a direction perpendicular to the moving direction, a second cut is required to cut the strips in the short direction with the long direction of the strip moving in the direction of the flakes. The crushing size of the nonwoven waste material can be determined by the moving speed of the conveyor and the number of cuts made by the axe-shaped blade per hour. As the guillotine cutter, the Guillotine Press Series (manufactured by Morita Environmental Tech Co., Ltd.) (Guillotine Press is a registered trademark), C Series (manufactured by GeorDing Machinery Co., Ltd.), N Series (manufactured by Pierret Co., Ltd.), etc. can be used.

[0039] The pelletizing process is a process in which flakes made of crushed nonwoven waste material are made into resin pellets by applying pressure and heat using a pellet molding device. The heated and pressurized flakes are forced into a die with many cylindrical small holes by an extruder, and are formed into cylindrical flakes by passing through the small holes. The pellet molding device is classified into a flat die type and a screw type depending on the molding method of the pellets. The flat die type is a type in which flakes are extruded from the upper side of a flat die to the lower side of the die by a compression roller as an extruder, and the molding temperature is 75 to 130 ° C. In another embodiment, the molding temperature can be 80 to 120 ° C. The screw type is a type in which flakes are extruded into a die by a screw as an extruder, and the molding temperature is 250 to 300 ° C. In the nonwoven fabric recycling method of the embodiment, the molding temperature is relatively low, so a flat die type pellet molding device can be used that can suppress the decrease in molecular weight due to thermal decomposition of the skeletal fiber. As a pellet molding device of the flat die type, a flat die pellet molding machine (manufactured by KAHL), an EF4 series (manufactured by Earth Engineering Co., Ltd.), a Pellemake series (manufactured by Kitagawa Iron Works Co., Ltd.), or the like can be used.

[0040] Resin pellets recycled from waste automotive interior and exterior materials through the crushing and pelletizing processes can be regenerated into resin fibers through a fiberization process, and can also be used as solid fuel.

[0041] In the fiberization process, the resin pellets are mixed with resin pellets of other compositions and / or a compatibilizer as necessary using a twin-screw extruder-type melt spinning machine, and melt spun to obtain undrawn yarn from the resin pellets. The undrawn yarn obtained from the resin pellets is drawn in warm water to obtain resin fiber. A compatibilizer is an additive that is added to mix different types of resins. An appropriate type of compatibilizer can be selected depending on the type of resin to be mixed.

[0042] As shown in Figure 1, resin fibers can be mixed with the skeletal fibers and adhesive fibers that make up the nonwoven fabric, and then thermoformed to form automotive interior and exterior materials. Thermoforming is carried out through a preliminary bonding process (nonwoven fabric formation process) and a heat molding process (processing process). The preliminary bonding process involves heating the nonwoven fabric to form a moldable nonwoven fabric, which is an intermediate molded product. The heat molding process involves integrating the moldable nonwoven fabric formed in the preliminary bonding process using a mold that is tailored to the installation location on the vehicle, to form an automotive interior or exterior material (molded product). EXAMPLES

[0043] The present invention will now be described in further detail with reference to examples.

[0044] Example 1 In Example 1, nonwoven fabric waste A, which is used for automobile exterior materials, was subjected to a crushing step and a pelletizing step to obtain resin pellets A from the nonwoven fabric waste A. The respective conditions are described below.

[0045] Nonwoven waste material A 2-layer structure: A1 layer (30mass%) + A2 layer (70mass%) A1 layer (PP(50mass%) / LPET(50mass%)) Core-sheath structure fiber 100mass% A2 layer (PET (63 mass%) / LPET (37 mass%)) Core-sheath fiber 80 mass% PP fiber 20mass% Overall, PET fiber: LPET fiber: PP fiber = 35:36:29 (mass%) Crushing process Crusher: Single-shaft crusher (SR series (manufactured by SSI Japan Co., Ltd.)) Exit screen: 28mm Pelletizing process Pellet molding equipment: EF4 series (manufactured by Earth Engineering Co., Ltd.) Die hole diameter: φ6mm Dice temperature: 80℃ Resin pellets A were mixed with PET pellets in a mass ratio of 50:50 to obtain mixed pellets A. Mixed pellets A were melt spun using a twin-screw extruder-type melt spinning machine (spinning temperature 300°C) to obtain undrawn yarn A from mixed pellets A. Undrawn yarn A was stretched four times in warm water at 80°C to obtain resin fiber A. Resin fiber A was mixed with skeletal fibers and adhesive fibers constituting a nonwoven fabric and thermoformed to form an interior or exterior material for an automobile.

[0046] Example 2 In Example 2, nonwoven waste material B used for automobile exterior materials was subjected to a crushing step and a pelletizing step to obtain resin pellets B from the nonwoven waste material B. The respective conditions are described below.

[0047] Non-woven waste material B 2-layer structure: A1 layer (30mass%) + A2 layer (70mass%) A1 layer (PP(50mass%) / LPET(50mass%)) Core-sheath structure fiber 100mass% A2 layer (PET (63 mass%) / LPET (37 mass%)) Core-sheath fiber 80 mass% PP fiber 20mass% Overall, PET fiber: LPET fiber: PP fiber = 35:36:29 (mass%) Crushing process Crusher: Guillotine cutter (N series (Pierret)) Cutting interval: 25 mm (cutting in one direction and in a direction perpendicular to the one direction) Pelletizing process Pellet molding equipment: EF4 series (manufactured by Earth Engineering Co., Ltd.) Die hole diameter: φ6mm Dice temperature: 80℃ Resin pellets B were mixed with PET pellets in a mass ratio of 50:50 to obtain mixed pellets B. Mixed pellets B were melt spun using a twin-screw extruder-type melt spinning machine (spinning temperature 300°C) to obtain undrawn yarn B from mixed pellets B. Undrawn yarn B was drawn 4 times in warm water at 80°C to obtain resin fiber B.

[0048] Example 3 In Example 3, the resin pellets B obtained in Example 2 were mixed with PET pellets and an acid-modified compatibilizer in a mass ratio of 69:30:1 to obtain mixed pellets C. The mixed pellets C were melt spun using a twin-screw extruder-type melt spinning machine (spinning temperature: 300°C) to obtain undrawn yarn C from the mixed pellets C. The undrawn yarn C was stretched four times in warm water at 80°C to obtain resin fiber C.

[0049] Example 4 In Example 4, automobile fender liner waste material D, which is an automobile exterior material made of nonwoven fabric, was subjected to a crushing step and a pelletizing step to obtain resin pellets D from the nonwoven fabric waste material D. The respective conditions are described below.

[0050] Fender liner waste D 2-layer structure: A1 layer (30mass%) + A2 layer (70mass%) A1 layer (PP(50mass%) / LPET(50mass%)) Core-sheath structure fiber 100mass% A2 layer (PET (63 mass%) / LPET (37 mass%)) Core-sheath fiber 80 mass% PP fiber 20mass% Overall, PET fiber: LPET fiber: PP fiber = 35:36:29 (mass%) Crushing process Crusher: Guillotine cutter (N series (Pierret)) Cutting interval: 20 mm (cutting in one direction and in a direction perpendicular to the one direction) Pelletizing process Pellet molding equipment: EF4 series (manufactured by Earth Engineering Co., Ltd.) Die hole diameter: φ10mm Dice temperature: 80℃ Resin pellets D were mixed with PET pellets in a mass ratio of 50:50 to obtain mixed pellets D. The mixed pellets D were melt spun using a twin-screw extruder-type melt spinning machine (spinning temperature 300°C) to obtain undrawn yarn D from the mixed pellets D. The undrawn yarn D was stretched four times in warm water at 80°C to obtain resin fiber D.

[0051] Example 5 In Example 5, nonwoven fabric waste E from a three-layer floor carpet as an interior material for automobiles was subjected to a crushing process and a pelletizing process to obtain resin pellets E from the nonwoven fabric waste E. The respective conditions are described below.

[0052] Non-woven waste material E 3-layer structure: E1 layer (45.5mass%) + E2 layer (13mass%) + E3 layer (41.5mass%) E1 layer (PET(90mass%) / LPET(10mass%)) Core-sheath structure fiber 100mass% E2 layer Low density PE film 100mass% E3 layer (PET (70 mass%) / LPET (30 mass%)) Core-sheath structure fiber 100 mass% Overall, PET fiber: LPET fiber: PE film = 70:17:13 (mass%) Crushing process (1st time) Crusher: Single-shaft crusher (UC series (manufactured by Uenotex Co., Ltd.)) Exit screen: 50mm Crushing process (2nd time) Crusher: Single-shaft crusher (UFW series (manufactured by Uenotex Co., Ltd.)) Exit screen: 20mm Pelletizing process Pellet molding equipment: EF4 series (manufactured by Earth Engineering Co., Ltd.) Die hole diameter: φ6mm Die temperature: 130℃ Resin pellets E were melt spun using a twin-screw extruder-type melt spinning machine (spinning temperature 300°C) to obtain undrawn yarn E from resin pellets E. Undrawn yarn E was stretched four times in warm water at 80°C to obtain resin fiber E. Resin fiber E was mixed with skeletal fibers and adhesive fibers constituting a nonwoven fabric and thermoformed to form an interior or exterior material for automobiles.

[0053] Example 6 In Example 6, nonwoven fabric waste F used as an exterior material for automobiles was subjected to a crushing step and a pelletizing step to obtain resin pellets F from the nonwoven fabric waste F. The respective conditions are described below.

[0054] Non-woven waste material F One layer of F1 layer (100 mass%) F1 layer (PET(50mass%) / LPET(50mass%)) Core-sheath fiber 100mass% Overall, PET fiber: LPET fiber = 50:50 (mass%) Crushing process Crusher: Guillotine cutter (N series (Pierret)) Cutting interval: 20 mm (cutting in one direction and in a direction perpendicular to the one direction) Pelletizing process Pellet molding equipment: EF4 series (manufactured by Earth Engineering Co., Ltd.) Die hole diameter: φ6mm Dice temperature: 80℃ Resin pellets E were melt spun using a twin-screw extruder-type melt spinning machine (spinning temperature 300°C) to obtain undrawn yarn F from resin pellets F. Undrawn yarn F was stretched four times in warm water at 80°C to obtain resin fiber F.

Claims

1. A method for recycling nonwoven fabric waste (nonwoven fabric waste) used as an interior and exterior material for automobiles, comprising the steps of: The nonwoven fabric waste material is composed of a plurality of different types of resins, The method includes a crushing step of crushing the nonwoven fabric waste material by a crusher, and a pelletizing step of pelletizing the crushed nonwoven fabric waste material by a pelletizing device, The method for recycling nonwoven waste material is characterized in that the pellet molding apparatus is a flat die type pellet molding apparatus, and the molding temperature in the pelletizing step is 75 to 130°C.

2. 2. The method for recycling nonwoven waste material according to claim 1, wherein the pellets regenerated from the nonwoven waste material in the pelletizing step are used as raw materials for fibers.

3. 3. The method for recycling nonwoven waste material according to claim 2, wherein the pellets are melt-spun into fibers.

4. 2. The method for recycling waste nonwoven fabric according to claim 1, wherein the resin constituting the waste nonwoven fabric is composed of a polyester resin and a polyolefin resin.

5. 5. The method for recycling waste nonwoven fabric according to claim 4, wherein the polyester resin constitutes fibers having a core-sheath structure, the core being made of a high-melting polyester resin and the sheath being made of a low-melting polyester resin.

6. 2. The method for recycling waste nonwoven fabric according to claim 1, wherein the resin constituting the waste nonwoven fabric is composed of a high melting point polyester resin and a low melting point polyester resin.

7. 7. The method for recycling nonwoven waste fabrics according to claim 1, wherein the crusher is a uniaxial crusher.

8. 7. The method for recycling nonwoven waste material according to claim 1, wherein the crusher is a guillotine cutter.

Images