Processing method for highly elastic nonwoven fabrics

Abstract

This invention provides a method for processing highly elastic nonwoven fabrics. [Solution] The high-elasticity nonwoven fabric formulation includes a high-elasticity fiber formulation and a parallel two-component fiber formulation. The parallel two-component fiber formulation consists of raw materials in a weight ratio of 95 to 99 parts polypropylene, 0.5 to 1.5 parts white masterbatch, 1 to 3 parts slip agent, and 3 to 5 parts polybutylene succinate. The high-elasticity fiber formulation consists of raw materials in a weight ratio of 66 to 72 parts styrene-ethylene-butylene-styrene block copolymer, 27 to 34 parts thermoplastic polyester elastomer TPEE, 1 to 3 parts slip agent, and 3 to 5 parts polybutylene succinate. The polypropylene is homopolypropylene or copolymerized polypropylene. In the present invention, the addition of thermoplastic polyester elastomer TPEE not only increases the elasticity of the nonwoven fabric but also improves its flexibility and breathability.

Description

Technical Field

[0001] The present invention relates to the field of manufacturing high-elastic non-woven fabrics, and particularly to a processing method for high-elastic non-woven fabrics.

Background Art

[0002] Non-woven fabric is also called无纺布, which is composed of oriented fibers or random fibers and is a new generation of environmentally friendly material. However, the lack of elasticity of conventional non-woven fabrics has always been a technical problem. To impart elasticity to non-woven fabrics, a common solution is to embed elastic films, spandex yarns and other elastic materials between two layers of non-woven fabrics. Another solution is to spray elastic materials on the surface of non-woven fabrics. However, these solutions not only significantly increase the weight of the products but also increase the difficulty of subsequent processing.

[0003] To solve the above problems, Chinese Patent No. CN107780047B published on June 12, 2020 provides a manufacturing method of elastic non-woven fabric, elastic non-woven fabric and its application. For the non-woven fabric related to this document, elasticity is imparted to the non-woven fabric by adding elastomers to the raw materials of three layers of fiber nets respectively. However, in this method, a large amount of elastomers need to be added, which increases the material cost, affects the abrasion resistance of the non-woven fabric and shortens the service life of the non-woven fabric. Moreover, the most fatal drawback of this non-woven fabric is that it is difficult to roll because the non-woven fabric directly has elasticity, which may affect the subsequent processing and efficiency of the non-woven fabric. Furthermore, the raw materials required for this non-woven fabric are mainly non-degradable materials such as polypropylene and vinyl polymers, which may have a long-term impact on the environment when the service period of the non-woven fabric ends.

[0004] Therefore, there is a need to provide a new processing method for high-elastic non-woven fabrics, and by using the above processing method, a non-woven fabric with excellent elasticity and abrasion resistance can be manufactured.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention aims to provide a method for processing highly elastic nonwoven fabrics in response to the problems of the prior art.

[0006] To solve the above problems, the present invention employs the following technical solution.

[0007] The formulation is a high-elasticity nonwoven fabric, and the high-elasticity nonwoven fabric formulation includes a high-elasticity fiber formulation and a parallel two-component fiber formulation, the parallel two-component fiber formulation consisting of raw materials in a parts by weight ratio of 95 to 99 parts polypropylene, 0.5 to 1.5 parts white masterbatch, 1 to 3 parts slip agent, and 3 to 5 parts polybutylene succinate, and the high-elasticity fiber formulation consisting of raw materials in a parts by weight ratio of 66 to 72 parts styrene-ethylene-butylene-styrene block copolymer, 27 to 34 parts thermoplastic polyester elastomer TPEE, 1 to 3 parts slip agent, and 3 to 5 parts polybutylene succinate.

[0008] The polypropylene is homopolypropylene or copolymerized polypropylene.

[0009] Furthermore, the white masterbatch is one of wollastonite, mica powder, and titanium dioxide powder, and the slip agent is one of erucic acid amide, oleic acid amide, fatty acid amide, and acetate amide.

[0010] The present invention also provides a method for processing a highly elastic nonwoven fabric, the processing method being as follows: Step 1: After mixing the raw materials for parallel two-component fibers according to the formulation, each is added to two different screw extruders of the A die head, extruded, melted, filtered, and then weighed and transported to the spinneret assembly of the A die head, where fusion spinning and yarn separation are performed to obtain the first parallel two-component fiber. Step 2: After mixing the raw materials for the high-elasticity fiber according to the formulation, they are each added to two different screw extruders of the B die head, subjected to extrusion melting and filtration, and then weighed and transported to the spinneret assembly of the B die head, where fusion spinning and yarn separation are performed to obtain the high-elasticity fiber. Step 3: After mixing the raw materials for the parallel two-component fiber according to the formulation, each is added to two different screw extruders of the C die head, extruded, melted, filtered, and then weighed and transported to the spinneret assembly of the C die head, where fusion spinning and yarn separation are performed to obtain the second parallel two-component fiber. Step 4 includes obtaining a highly elastic nonwoven fabric by laying an online mesh, pre-bonding, and reinforcing adhesive on a mesh curtain, with the highly elastic fibers from Step 2 as the intermediate layer, the first parallel two-component fibers from Step 1 as the upper layer, and the second parallel two-component fibers from Step 3 as the lower layer.

[0011] Furthermore, in step 1, the temperatures of the two different screw extruders of die head A are 200-250°C and 180-260°C, respectively; in step 2, the temperatures of the two different screw extruders of die head B are 200-250°C and 180-260°C, respectively; and in step 3, the temperatures of the two different screw extruders of die head C are 200-250°C and 180-260°C, respectively.

[0012] Furthermore, the temperatures of the two different screw extruders of die head A are 200-250°C and 180-260°C, respectively, the temperature of the spinneret assembly of die head A is 220-260°C, and spinning is performed using a cold air draft method, with the temperature of the cold air being 15-25°C and the air pressure being 1000-4000 Pa.

[0013] Furthermore, the temperatures of the two different screw extruders of the B die head are 200-250°C and 180-260°C, respectively, with a metering extrusion rate of 450-500 kg / h, the temperature of the spinneret assembly of the B die head is 200-450°C, and spinning is performed using a cold air draft method, with a cold air temperature of 8-30°C and a wind pressure of 500-3000 Pa.

[0014] Furthermore, the temperatures of the two different screw extruders in the C die head are 200-250°C and 180-260°C, respectively, the temperature of the spinneret assembly in the C die head is 220-260°C, and spinning is performed using a cold air draft method, with the temperature of the cold air being 15-25°C and the air pressure being 1000-4000 Pa.

[0015] Furthermore, in step 4, the speed of laying the mesh is 50-400 m / min.

[0016] Furthermore, once the mesh is laid, a fiber net is formed, and the fiber net is transported to the pre-bonding device by the negative pressure of the suction air.

[0017] Furthermore, in step 4, the apparatus for pre-bonding is a pre-press roll or a hot air knife, the temperature of the pre-press roll is 50-120°C, and the temperature of the hot air knife is 100-160°C.

[0018] Furthermore, in step 4, the reinforcement work may be hot press bonding, hot air bonding, spunlace bonding, or needle bonding.

[0019] Furthermore, the apparatus used for hot press bonding is a hot rolling mill, the hot compression temperature of the hot rolling mill is 100-150°C, and the linear pressure is 75-105 N / mm.

[0020] Furthermore, the apparatus for performing spunlace bonding is a spunlace machine, the spunlace pressure of the spunlace machine is 10-40 MPa, and the drying temperature is 100-130°C.

[0021] Furthermore, the device for performing hot air bonding is an oven, and the temperature of the oven is 100 to 150°C.

[0022] Furthermore, the frequency of the needle loom for performing needle bonding is 1,000 to 3,000 rpm.

[0023] Furthermore, the processing method includes mechanical activation, and the mechanical activation is either on-line activation or off-line activation.

[0024] Furthermore, according to the downstream usage needs, on-line activation or off-line activation can be performed on the non-woven fabric to activate the elasticity of the product. The specific operation of the activation is to heat the non-woven fabric with a hot roll at 60 to 150°C and then pass it through a cooling roll at 8 to 25°C for low-temperature forming.

Advantages of the Invention

[0025] Compared with the prior art, the advantages of the present invention are as follows.

[0026] 1. By introducing thermoplastic polyester elastomer TPEE into styrene-ethylene-butylene-styrene block copolymer (SEBS) in this solution, the thermal stability problem of SEBS during high-temperature processing is effectively improved. Such improvement makes it less likely for SEBS to decompose during the manufacturing process at high temperatures, improves the breaking strength and breaking force of the non-woven fabric, and significantly improves the elasticity of the non-woven fabric. In addition, the addition of TPEE improves the elasticity and resilience of the non-woven fabric, gives the manufactured non-woven fabric good elongation at break and elongation rate, and also gives the non-woven fabric good air permeability and flexibility.

[0027] 2. The formulation of the non-woven fabric raw materials provided by this solution and the mixing ratio between the components during mixing significantly improve the elastic properties of the non-woven fabric. In addition, the polybutylene succinate used in the formulation of this solution is a degradable particle. The addition of such a substance improves the environmental performance of the non-woven fabric, and the non-woven fabric manufactured by this solution can be naturally decomposed after its lifespan ends, reducing the impact on the environment.

[0028] 3. The processing method provided by the present invention fixes the parallel bicomponent fibers manufactured by the A die head and the C die head and the elastic fibers manufactured by the B die head, thereby restricting the elongation of the elastic fibers manufactured by the B die head, which is the intermediate layer. As a result, the highly elastic non-woven fabric before activation does not exhibit an elastic effect. The combination of this process and the fibers aims to ensure the flexibility of the product, and further improves the efficiency of winding and cutting of the non-woven fabric by giving the non-woven fabric after activation an excellent elongation rate.

Brief Description of the Drawings

[0029] [Figure 1] Figure 1 is a flowchart of the processing method of the formulation of the highly elastic non-woven fabric prepared by the present invention.

Embodiments for Carrying Out the Invention

[0030] Embodiment 1, It is a highly elastic non-woven fabric, and its processing method is as follows.

[0031] 1. Preparation of the first parallel bicomponent fibers. 95 parts homopolypropylene, 0.5 parts titanium dioxide, 2 parts erucamide, and 4 parts polybutylene succinate are weighed and mixed, and added to the first screw extruder of the A die head; extrusion melting is performed under conditions where the temperature of the first screw extruder is 200-250°C to obtain a hot melt; the hot melt is then filtered by a filtration system and a metering pump, and once weighed, the metering pump feeds the hot melt to the spinneret assembly of the A die head at an extrusion rate of 450-500 kg / h. Simultaneously, 95 parts copolymerized polypropylene, 0.5 parts titanium dioxide, 2 parts erucamide, and 4 parts polybutylene succinate are weighed and mixed, then added to the second screw extruder of die head A, and extrusion melting is performed under conditions where the temperature of the second screw extruder is 180-260°C to obtain the second hot melt; the second hot melt is then filtered by a filtration system and a metering pump, and once weighed, the metering pump extrudes the second hot melt to die head A at a rate of 450-500 kg / h. The fibers are sent to the spinneret assembly of the die head, and fusion spinning is performed under conditions where the temperature of the spinneret assembly of the die head is 220-260°C. At the same time, unsuitable monomers or other low molecular weight substances are discharged, and then the fibers are drafted in a cold air duct with a cold air temperature of 15-25°C and a wind pressure of 1000-4000 Pa to obtain the primary filaments; the primary filaments then pass through a wind chamber with 10-80% main bleed air and 20-90% secondary bleed air, and the secondary filaments are drafted by the action of the main and secondary bleed air to obtain the first parallel two-component fibers.

[0032] 2. Preparation of high-elasticity fibers. After weighing and mixing 31 parts thermoplastic polyester elastomer TPEE, 67 parts styrene-ethylene-butylene-styrene block copolymer, 2 parts erucic acid amide, and 4 parts polybutylene succinate, this mixture is added to the third screw extruder of the B die head. Then, after weighing and mixing 33 parts thermoplastic polyester elastomer TPEE, 69 parts styrene-ethylene-butylene-styrene block copolymer, 2 parts erucic acid amide, and 4 parts polybutylene succinate, this mixture is added to the fourth screw extruder of the B die head. Extrusion melting is performed under conditions where the temperature of the third screw extruder is 200-250°C and the temperature of the fourth screw extruder is 180-260°C to obtain two hot melts. After filtering and metering the two hot melts using a filtration system and a metering pump, the metering pump transports the hot melts to the spinneret assembly of the B die head at an extrusion rate of 450-500 kg / h, and fusion spinning is performed under conditions of a temperature of 200-450°C, while simultaneously discharging unsuitable monomers or other low molecular weight substances. The resulting filaments are then drafted in a cold air duct with a cold air temperature of 8-30°C and a wind pressure of 500-3000 Pa to obtain primary filaments. The primary filaments are then drafted into secondary filaments by the combined action of 10-80% primary bleed air and 20-90% secondary bleed air to obtain high-elasticity fibers.

[0033] 3. Preparation of the second parallel two-component fiber. 95 parts homopolypropylene, 2 parts erucamide, 0.5 parts titanium dioxide, and 4 parts polybutylene succinate were weighed by weight, mixed, and then added to the 5th and 6th screw extruders of the C die head, respectively. Extrusion melting was performed in the 5th screw extruder at a temperature of 200-250°C; and in the 6th screw extruder at a temperature of 180-260°C. The two molten materials were then filtered and weighed using a filtration system and a metering pump. Next, the metering pump delivers the material to the spinneret assembly of the C die head at an extrusion rate of 450-500 kg / h, and fusion spinning is performed under conditions of a temperature of 220-260°C, simultaneously discharging unsuitable monomers or other low molecular weight substances. Then, the material is drafted in a cold air duct with a cold air temperature of 15-25°C and a wind pressure of 1000-4000 Pa to obtain the primary filament; the primary filament is then drafted with secondary filaments by the combined action of 10-80% primary bleed air and 20-90% secondary bleed air to obtain the second parallel two-component fiber.

[0034] 4. Preparation of nonwoven fabric. The first parallel two-component fibers, high-elasticity fibers, and second parallel two-component fibers are combined online from top to bottom, and the mesh is laid on the mesh curtain of a mesh belt machine at a speed of 50-400 m / min to form a uniform fiber net. The fiber net is transported to a pre-press roller or hot air knife for pre-bonding to obtain a pre-bonded fiber net; the pre-bonded fiber net is transported to a hot rolling mill, spun lath machine, hot air machine, or needle loom for bonding and reinforcement to obtain an unactivated nonwoven fabric. The nonwoven fabric is transported to a hot roll at 60-150°C for online mechanical activation, and the activated nonwoven fabric is passed through a cooling roll at 8-25°C for low-temperature molding to obtain an activated nonwoven fabric; finally, it is wound onto a roll of fabric by a winding machine and divided according to the needs.

[0035] Embodiment 2, This embodiment is distinguished from Embodiment 1 as follows.

[0036] In Step 1, the raw materials fed into the first screw extruder of die head A consisted of 97 parts by weight of homopolypropylene, 1 part of titanium dioxide, 2 parts of erucic acid amide, and 4 parts of polybutylene succinate. The raw materials fed into the second screw extruder of die head A consisted of 97 parts by weight of copolymerized polypropylene, 1 part of titanium dioxide, 2 parts of erucic acid amide, and 4 parts of polybutylene succinate.

[0037] In step 2, the raw materials added to the third and fourth screw extruders of the B die head were, in parts by weight, 68 parts styrene-ethylene-butylene-styrene block copolymer, 30 parts thermoplastic polyester elastomer TPEE, 2 parts erucic acid amide, and 5 parts polybutylene succinate.

[0038] In step 3, the raw materials added to the fifth screw extruder of the C die head were, by weight, 97 parts homopolypropylene, 1 part titanium dioxide, 2 parts erucamide, and 3 parts polybutylene succinate, and the raw materials added to the sixth screw extruder of the C die head were, by weight, 97 parts copolymerized polypropylene, 1 part titanium dioxide, 2 parts erucamide, and 3 parts polybutylene succinate.

[0039] Embodiment 3, This embodiment is distinguished from Embodiment 1 as follows.

[0040] In Step 1, the raw materials fed into the first screw extruder of die head A consisted of 99 parts by weight of homopolypropylene, 1.5 parts of titanium dioxide, 3 parts of erucic acid amide, and 5 parts of polybutylene succinate. The raw materials fed into the second screw extruder of die head A consisted of 99 parts by weight of copolymerized polypropylene, 1.5 parts of titanium dioxide, 3 parts of erucic acid amide, and 5 parts of polybutylene succinate.

[0041] In step 2, the raw materials added to the third and fourth screw extruders of the B die head were, in parts by weight, 72 parts styrene-ethylene-butylene-styrene block copolymer, 34 parts thermoplastic polyester elastomer TPEE, 3 parts erucic acid amide, and 5 parts polybutylene succinate.

[0042] In step 3, the raw materials added to the fifth and sixth screw extruders of the C die head were, in all cases, 99 parts by weight of homopolypropylene, 1.5 parts of titanium dioxide, 3 parts of erucamide, and 5 parts of polybutylene succinate.

[0043] Embodiment 4, This embodiment is distinguished from Embodiment 1 as follows.

[0044] In Step 1, the raw materials added to the first and second screw extruders of the A die head were, in parts by weight, 95 parts homopolypropylene, 0.5 parts titanium dioxide, 1 part erucamide, and 3 parts polybutylene succinate.

[0045] In step 2, the raw materials added to the third and fourth screw extruders of the B die head were, in parts by weight, 66 parts styrene-ethylene-butylene-styrene block copolymer, 27 parts thermoplastic polyester elastomer TPEE, 1 part erucic acid amide, and 3 parts polybutylene succinate.

[0046] In step 3, the raw materials added to the fifth and sixth screw extruders of the C die head were, in all cases, 95 parts by weight of homopolypropylene, 0.5 parts of titanium dioxide, 1 part of erucamide, and 3 parts of polybutylene succinate.

[0047] Embodiment 5, This embodiment is distinguished from Embodiment 1 as follows.

[0048] In Step 1, the raw materials added to the first and second screw extruders of the A die head were, in parts by weight, 93 parts homopolyethylene, 0.2 parts titanium dioxide, 0.5 parts oleamide, and 2 parts polyhydrocarbon fatty acids.

[0049] In step 2, the raw materials added to the third and fourth screw extruders of the B die head were, in parts by weight, 63 parts styrene-ethylene-butylene-styrene block copolymer, 26 parts thermoplastic polyester elastomer TPEE, 0.5 parts oleamide, and 2 parts polyhydrocarbon fatty acid.

[0050] In step 3, the raw materials added to the fifth and sixth screw extruders of the C die head were, in all cases, 93 parts by weight of homopolyethylene, 1 part of titanium dioxide, 1 part of oleamide, and 3 parts of polyhydrocarbon fatty acid.

[0051] Embodiment 6, This embodiment is distinguished from Embodiment 1 as follows.

[0052] In Step 1, the raw materials fed into the first screw extruder of die head A consisted of 100 parts by weight of homopolypropylene, 2 parts of titanium dioxide, 4 parts of erucic acid amide, and 7 parts of polybutylene succinate. The raw materials fed into the second screw extruder of die head A consisted of 101 parts by weight of copolymerized polypropylene, 2 parts of titanium dioxide, 4 parts of erucic acid amide, and 7 parts of polybutylene succinate.

[0053] In step 2, the raw materials added to the third and fourth screw extruders of the B die head were, in parts by weight, 75 parts styrene-ethylene-butylene-styrene block copolymer, 37 parts thermoplastic polyester elastomer TPEE, 5 parts erucic acid amide, and 7 parts polybutylene succinate.

[0054] In step 3, the raw materials added to the fifth and sixth screw extruders of the C die head were, in both cases, 103 parts by weight of homopolyethylene, 3 parts of titanium dioxide, 7 parts of erucic acid amide, and 9 parts of polybutylene succinate.

[0055] Comparison form 1, The distinction between this comparative form and Embodiment 1 is as follows.

[0056] In Step 1, the raw materials fed into the first screw extruder of die head A consisted of 95 parts by weight of homopolypropylene, 2 parts of titanium dioxide, and 0.5 parts of erucic acid amide, and the raw materials fed into the second screw extruder of die head A consisted of 95 parts by weight of copolymerized polypropylene, 0.5 parts of titanium dioxide, 2 parts of erucic acid amide, and 4 parts of polybutylene succinate.

[0057] In step 2, the raw materials added to the third and fourth screw extruders of the B die head were 68 parts by weight of styrene-ethylene-butylene-styrene block copolymer and 2 parts by weight of erucic acid amide.

[0058] In step 3, the raw materials added to the fifth and sixth screw extruders of the C die head were 95 parts by weight of homopolypropylene, 0.5 parts of titanium dioxide, and 2 parts of erucic acid amide.

[0059] Test format 1, Tensile tests were performed on the nonwoven fabrics according to Embodiments 1 to 6 and Comparative Embodiment 1, and the test results are as shown in the table below.

[0060] [Table 1]

[0061] According to Table 1, when the parallel two-component formulation consists of 95-99 parts polypropylene, 0.5-1.5 parts white masterbatch, 1-3 parts slip agent, and 3-5 parts polybutylene succinate, and the high-elasticity fiber formulation consists of 66-72 parts styrene-ethylene-butylene-styrene block copolymer, 27-34 parts thermoplastic polyester elastomer TPEE, 1-3 parts slip agent, and 3-5 parts polybutylene succinate, the breaking strength can reach 21.71 N or more and the breaking strength can reach 0.37 N / mm or more; according to Embodiment 5, when the parts by weight of each component is reduced, the breaking strength of the nonwoven fabric decreases to 13.75 N and the breaking strength decreases to 0.11 N / mm; according to Embodiment 6, when the parts by weight of each component in the formulation is increased, the breaking strength of the nonwoven fabric decreases to 15.73 N and the breaking strength decreases to 0.18 N / mm. These data indicate that increasing or decreasing the weight fraction of each group in the formulation does not increase the rupture strength and rupture durability of the nonwoven fabric.

[0062] According to Table 1, the tear strength and tear power of the nonwoven fabrics produced in Embodiments 1 to 6 are significantly greater than those of the nonwoven fabric produced in Comparative Embodiment 1. The elongation at break and elongation rate at break of the nonwoven fabrics produced in Embodiments 1 to 6 are significantly greater than those of the nonwoven fabric produced in Comparative Embodiment 1; this indicates that the nonwoven fabrics produced by this method can not only withstand a single stretch but also maintain stable performance even with repeated stretching and compression. Such sustained elasticity and deformation resistance ensure the durability and reliability of the nonwoven fabrics in long-term use.

[0063] According to Embodiments 1 to 4, the nonwoven fabric produced by this method has a breaking elongation of 113.83 mm or more, and a breaking elongation ratio of 41.20% or more. These data demonstrate that the nonwoven fabric produced by this method can not only withstand a single stretch, but also maintain stable performance even with repeated stretching and compression. Such sustained elasticity and deformation resistance ensure the durability and reliability of the nonwoven fabric in long-term use.

[0064] Test format 2, Tests were conducted on the physical properties of the inactivated nonwoven fabrics according to Embodiments 1 to 6 and Comparative Embodiment 1, and the specific test results are shown in Table 2.

[0065] [Table 2]

[0066] Test format 3, Tests were conducted on the physical properties of the activated nonwoven fabrics according to Embodiments 1 to 6 and Comparative Embodiment 1, and the specific test results are shown in Table 3.

[0067] [Table 3]

[0068] According to the data in Tables 2 and 3, the nonwoven fabric produced by the processing of the present invention possesses excellent lightness, flexibility, and breathability. Furthermore, the nonwoven fabric produced by the present invention maintains these properties both before and after mechanical activation, and the increase in elasticity does not come at the expense of other physical properties. In other words, the nonwoven fabric produced by the present invention maintains its conventional lightness, flexibility, and breathability while increasing its elasticity through activation, ensuring the comprehensiveness and reliability of the nonwoven fabric produced by this method in practical applications.

Claims

1. The present invention relates to a processing method for a highly elastic nonwoven fabric, wherein the formulation of the highly elastic nonwoven fabric includes a highly elastic fiber formulation and a parallel two-component fiber formulation, the parallel two-component fiber formulation consisting of raw materials in a weight ratio of 95 to 99 parts polypropylene, 0.5 to 1.5 parts white masterbatch, 1 to 3 parts slip agent, and 3 to 5 parts polybutylene succinate, the highly elastic fiber formulation consisting of raw materials in a weight ratio of 66 to 72 parts styrene-ethylene-butylene-styrene block copolymer, 27 to 34 parts thermoplastic polyester elastomer TPEE, 1 to 3 parts slip agent, and 3 to 5 parts polybutylene succinate, and the polypropylene is homopolypropylene or copolymerized polypropylene. The aforementioned processing method is as follows: Step 1: After mixing the raw materials for parallel two-component fibers according to the formulation, each is added to two different screw extruders of the A die head, extruded, melted, and filtered. Then, the materials are weighed and transported to the spinneret assembly of the A die head, where fusion spinning and yarn separation are performed to obtain the first parallel two-component fiber. Step 2: After mixing the raw materials for the high-elasticity fiber according to the formulation, each is added to two different screw extruders of the B die head, extruded, melted, and filtered. Then, the mixture is weighed and transported to the spinneret assembly of the B die head, where fusion spinning and yarn separation are performed to obtain the high-elasticity fiber. Step 3: After mixing the raw materials for the parallel two-component fiber according to the formulation, each is added to two different screw extruders of the C die head, extruded, melted, filtered, and then weighed and transported to the spinneret assembly of the C die head, where fusion spinning and yarn separation are performed to obtain the second parallel two-component fiber. A method for processing a highly elastic nonwoven fabric, characterized by comprising step 4, on a mesh curtain, using the highly elastic fibers from step 2 as an intermediate layer, the first parallel two-component fibers from step 1 as an upper layer, and the second parallel two-component fibers from step 3 as a lower layer, and performing online mesh laying, pre-bonding, and reinforcing bonding to obtain a highly elastic nonwoven fabric.

2. The method for processing a highly elastic nonwoven fabric according to claim 1, characterized in that the white masterbatch is one of wollastonite, mica powder, and titanium dioxide powder, and the slip agent is one of erucic acid amide, oleic acid amide, fatty acid amide, and acetate amide.

3. The processing method for a highly elastic nonwoven fabric according to claim 1, characterized in that the processing method includes mechanical activation, the mechanical activation is either online or offline, and the specific operation of the mechanical activation is to heat the nonwoven fabric with a hot roll at 60 to 150°C, and then pass it through a cooling roll at 8 to 25°C to perform low-temperature molding.

4. In step 1, the temperatures of the two different screw extruders of die head A are 200-250°C and 180-260°C, respectively. In step 2, the temperatures of the two different screw extruders of die head B are 200-250°C and 180-260°C, respectively. The method for processing a highly elastic nonwoven fabric according to claim 1, characterized in that, in step 3, the temperatures of the two different screw extruders of the C die head are 200 to 250°C and 180 to 260°C, respectively.

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