High-toughness non-woven fabric for homogeneous bags and preparation method thereof

Abstract

The present invention discloses a high-toughness non-woven fabric for homogeneous bags and a preparation method thereof, relating to the field of new materials technology. The high-toughness non-woven fabric for homogeneous bags produced in the present invention is produced by post-finishing a hydrophilic polyethylene non-woven fabric with a finishing agent. The hydrophilic polyethylene non-woven fabric is produced by first grafting glycidyl methacrylate onto the surface of the polyethylene non-woven fabric by electron beam radiation and then reacting with hydrophilic polylactic acid, thereby enhancing the hydrophilicity of the polyethylene non-woven fabric. The modified polyether ester is produced by reacting a modified phenolic resin with 2,5-furandicarboxylic acid and then with tributyl citrate. The modified phenolic resin is produced by reacting a phenolic resin with o-toluidine, thereby enhancing the toughness of the non-woven fabric.

Description

Technical Field

[0001] The present invention relates to the technical field of new materials, in particular to a high-toughness non-woven fabric for homogeneous bags and a preparation method thereof. Background Art

[0002] Homogenizing bags are mainly used for sample processing, pre-enrichment or sample dilution when detecting different types of bacteria in food, including full-membrane homogenizing bags, side-membrane homogenizing bags, and membrane-less homogenizing bags. Polyethylene is used as the filter membrane material of homogenizing bags. Due to its low surface energy, poor hydrophilicity, and poor biocompatibility, it is easy for proteins to adhere to the surface, making the homogenizing bags difficult to clean.

[0003] Polyethylene, which is used as the filter membrane material of homogeneous bags, still needs to be improved in terms of hydrophilicity and toughness. Therefore, the present invention studies and prepares a high-toughness non-woven fabric for homogeneous bags that has both hydrophilicity and toughness, which reduces the difficulty of cleaning the homogeneous bags and enables the polyethylene non-woven fabric to be better used in homogeneous bags. Summary of the Invention

[0004] The object of the present invention is to provide a high-tenacity non-woven fabric for homogeneous bags and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a high-toughness non-woven fabric for homogeneous bags, wherein the high-toughness non-woven fabric for homogeneous bags is obtained by post-finishing a hydrophilic polyethylene non-woven fabric with a post-finishing agent; the post-finishing agent is modified polyether ester.

[0006] Preferably, the hydrophilic polyethylene non-woven fabric is prepared by first grafting glycidyl methacrylate on the surface of the polyethylene non-woven fabric through electron beam radiation and then reacting with hydrophilic polylactic acid; the hydrophilic polylactic acid is prepared by reacting 3-amino-1,2-propanediol with polylactic acid.

[0007] Preferably, the modified polyether ester is prepared by reacting a modified phenolic resin with 2,5-furandicarboxylic acid and then reacting with tributyl citrate.

[0008] Preferably, the modified phenolic resin is prepared by reacting phenolic resin with o-toluidine.

[0009] Preferably, a method for preparing a high-tenacity non-woven fabric for a homogeneous bag comprises the following specific steps:

[0010] (1) After irradiating a polyethylene non-woven fabric with a nano-electron accelerator, the fabric was immersed in a glycidyl methacrylate solution, nitrogen was passed through the system to remove oxygen, and the system was sealed. The temperature was raised to 62-65° C., and the reaction was continued for 2-4 hours. The fabric was removed and washed with deionized water for 3-5 times, and then vacuum-dried at 60-65° C. to a constant weight to obtain a modified polyethylene non-woven fabric.

[0011] (2) immersing the modified polyethylene non-woven fabric in hydrophilic polylactic acid, passing nitrogen to remove oxygen in the system, sealing the system, heating to 80-90°C, reacting for 4-6 hours, removing the fabric and washing it with deionized water for 3-5 times, and then vacuum drying it at 60-65°C to constant weight to obtain a hydrophilic polyethylene non-woven fabric;

[0012] (3) Under a nitrogen atmosphere, a modified phenolic resin, 2,5-furandicarboxylic acid, a TY-2 titanium catalyst, and a sulfonic acid catalyst HY-9025 are mixed in a mass ratio of 10-20:15-18:0.1-0.2:0.3-0.5, the mixture is heated to 180-190° C., nitrogen is passed through to remove water, and after no water is discharged, the mixture is heated to 220-230° C. and reacted for 8-20 hours to obtain a polyether ester;

[0013] (4) polyether ester and dimethylacetamide were mixed in a mass ratio of 1:18-20, stirred evenly, and lithium chloride was added in an amount of 1-1.5 times the mass of the polyether alcohol. After reacting for 4-6 hours, tributyl citrate was added, and the mixture was transferred to a nitrogen atmosphere, heated to 125-135° C., and reacted for 35-48 hours to obtain a finishing agent.

[0014] (5) The hydrophilic polyethylene non-woven fabric is post-finished with a post-finishing agent to obtain a high-tenacity non-woven fabric for homogeneous bags.

[0015] Preferably, in the above step (1), the irradiation dose is 180 to 220 kGy; and in the glycidyl methacrylate solution, the volume ratio of glycidyl methacrylate, methanol and deionized water is 1 to 2:50:50.

[0016] Preferably, in the above step (2): the preparation method of hydrophilic polylactic acid is: polylactic acid and 1,4-dioxane are mixed in a mass ratio of 1:18-20, heated to 60-65°C, stirred evenly, and then 1.3-1.5 times the mass of the polylactic acid and a mass fraction of 1-2% 3-amino-1,2-propanediol aqueous solution are added dropwise at a rate of 1-3 ml / min, and the reaction is continued for 20-30 minutes to obtain hydrophilic polylactic acid.

[0017] Preferably, in the above step (3), the preparation method of the modified phenolic resin is as follows: phenol, formaldehyde and barium hydroxide are mixed in a mass ratio of 0.7-1:1.2:4.5 and heated to 62-65°C, reacted for 60-90 minutes, then heated to 72-75°C, continued to react for 60-90 minutes, heated again to 82-85°C, reacted for 30-50 minutes, and then added with o-toluidine in an amount of 0.1-0.3 times the mass of phenol, continued to react for 3-8 hours, transferred to a rotary evaporator, vacuum-evacuated at 60-62°C for 20-40 minutes, and cooled to room temperature to obtain the modified phenolic resin.

[0018] Preferably, in the above step (4), the mass ratio of polyether ester to tributyl citrate is 1:0.2-0.4.

[0019] Preferably, in the above step (5), during the post-finishing process, the hydrophilic polyethylene non-woven fabric is immersed in the post-finishing agent, heated to 60-90° C., reacted for 8-10 minutes, removed and allowed to stand for 3-5 hours, then washed with deionized water 3-5 times, and finally vacuum dried at 60-90° C.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The high-toughness non-woven fabric for homogeneous bags prepared by the present invention is obtained by post-finishing a hydrophilic polyethylene non-woven fabric; the post-finishing agent is a modified polyether ester;

[0022] The hydrophilic polyethylene non-woven fabric is prepared by first grafting glycidyl methacrylate onto the surface of the polyethylene non-woven fabric through electron beam radiation, and then reacting with hydrophilic polylactic acid; the hydrophilic polylactic acid is prepared by reacting 3-amino-1,2-propanediol with polylactic acid; the amino group on the 3-amino-1,2-propanediol forms an amide with the ester bond in the polylactic acid, and also introduces hydrophilic hydroxyl groups, which then undergo a ring-opening reaction with the polyethylene non-woven fabric grafted with glycidyl methacrylate, thereby enhancing the hydrophilicity of the polyethylene non-woven fabric;

[0023] The modified polyether ester is prepared by reacting a modified phenolic resin with 2,5-furandicarboxylic acid and then reacting with tributyl citrate. The modified phenolic resin is prepared by reacting a phenolic resin with o-toluidine. When the phenolic resin reacts with o-toluidine, o-toluidine adds to the aldehyde group and then condenses with the hydroxyl group, thereby enhancing the polarity of the system. After reacting with 2,5-furandicarboxylic acid, the ester exchange is carried out with tributyl citrate to introduce long-chain tributyl citrate into the phenolic resin molecule, and the condensation is continued to form a modified polyether ester with a three-dimensional cross-linked network structure, so that the cross-linked network structure cured by the finishing agent is more uniform. After the modified polyether ester is finished on the surface of the composite non-woven fabric, it forms hydrogen bonds with the hydroxyl groups on the hydrophilic polyethylene non-woven fabric, and forms a uniform three-dimensional network structure bonding layer after curing, thereby enhancing the toughness of the non-woven fabric. DETAILED DESCRIPTION

[0024] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. The polyethylene non-woven fabrics in the embodiments of the present invention and the comparative examples were purchased from Guangzhou Filter Source Water Purification Equipment Co., Ltd.; polylactic acid was purchased from Suzhou Green Expo Materials Co., Ltd.; and polyether ester was purchased from Hai'an Petrochemical Plant.

[0025] In order to more clearly illustrate the method provided by the present invention, the following examples are used to describe in detail the various index testing methods of the high-tenacity non-woven fabrics for homogeneous bags prepared in the examples and comparative examples as follows:

[0026] Hydrophilicity: The contact angles of the homogeneous bags made from the embodiment and comparative example of the same size and made of high-tenacity non-woven fabric were measured using a contact angle meter.

[0027] Toughness: The homogeneous bags of the same size prepared in the embodiment and the comparative example were subjected to a tensile strength test using high-toughness non-woven fabrics with reference to GB / T1040.

[0028] Example 1

[0029] (1) A polyethylene non-woven fabric was irradiated with a nano-electron accelerator at a dose of 180 kGy, and then immersed in a glycidyl methacrylate solution, wherein the volume ratio of glycidyl methacrylate, methanol, and deionized water was 1:50:50. Nitrogen was passed through the system to remove oxygen, and then the system was sealed and heated to 62°C. After reacting for 2 hours, the fabric was removed and washed three times with deionized water, and then vacuum dried at 60°C to constant weight to obtain a modified polyethylene non-woven fabric.

[0030] (2) Polylactic acid and 1,4-dioxane were mixed in a mass ratio of 1:18, heated to 60°C, stirred evenly, and then a 1% 3-amino-1,2-propanediol aqueous solution (1.3 times the mass of the polylactic acid) was added dropwise at a rate of 1 ml / min, and the reaction was continued for 20 minutes to obtain hydrophilic polylactic acid; the modified polyethylene non-woven fabric was immersed in the hydrophilic polylactic acid, nitrogen was passed through the system to remove oxygen, and then sealed, heated to 80°C, reacted for 4 hours, removed and washed with deionized water 3 times, and then vacuum dried at 60°C to constant weight to obtain a hydrophilic polyethylene non-woven fabric;

[0031] (3) Phenol, formaldehyde and barium hydroxide were mixed in a mass ratio of 0.7:1.2:4.5 and heated to 62°C. After reacting for 60 minutes, the temperature was raised to 72°C and the reaction was continued for 60 minutes. The temperature was again raised to 82°C and the reaction was continued for 30 minutes. Then, 0.1 times the mass of o-toluidine of the phenol was added and the reaction was continued for 3 hours. The mixture was transferred to a rotary evaporator and vacuum-evacuated at 60°C for 20 minutes. The mixture was cooled to room temperature to obtain a modified phenolic resin. Under a nitrogen atmosphere, the modified phenolic resin, 2,5-furandicarboxylic acid, TY-2 titanium catalyst and sulfonic acid catalyst HY-9025 were mixed in a mass ratio of 10:15:0.1:0.3. The mixture was heated to 180°C and dehydrated by nitrogen. After no water was discharged, the mixture was heated to 220°C and reacted for 8 hours to obtain polyether ester.

[0032] (4) Polyether ester and dimethylacetamide were mixed in a mass ratio of 1:18, stirred evenly, and lithium chloride (1 times the mass of polyether alcohol) was added. After reacting for 4 hours, tributyl citrate was added. The mass ratio of polyether ester to tributyl citrate was 1:0.2. The mixture was transferred to a nitrogen atmosphere, heated to 125°C, and reacted for 35 hours to obtain a finishing agent.

[0033] (5) The hydrophilic polyethylene non-woven fabric is post-finished with a post-finishing agent. The hydrophilic polyethylene non-woven fabric is immersed in the post-finishing agent, heated to 60°C, reacted for 8 minutes, taken out and allowed to stand for 3 hours, then washed with deionized water 3 times, and finally vacuum-dried at 60°C to obtain a high-tenacity non-woven fabric for homogeneous bags.

[0034] Example 2

[0035] (1) A polyethylene non-woven fabric was irradiated with a nano-electron accelerator at a dose of 200 kGy, and then immersed in a glycidyl methacrylate solution, wherein the volume ratio of glycidyl methacrylate, methanol, and deionized water was 1.5:50:50. Nitrogen was passed through the system to remove oxygen, and then the system was sealed and heated to 64°C. After reacting for 3 hours, the fabric was removed and washed with deionized water four times, and then vacuum dried at 62°C to constant weight to obtain a modified polyethylene non-woven fabric.

[0036] (2) Polylactic acid and 1,4-dioxane were mixed in a mass ratio of 1:19, heated to 63°C, stirred evenly, and then a 1.5% 3-amino-1,2-propanediol aqueous solution (1.4 times the mass of the polylactic acid) was added dropwise at a rate of 2 ml / min, and the reaction was continued for 25 minutes to obtain hydrophilic polylactic acid; the modified polyethylene non-woven fabric was immersed in the hydrophilic polylactic acid, nitrogen was passed through the system to remove oxygen, and then sealed, heated to 85°C, reacted for 5 hours, removed and washed with deionized water 4 times, and then vacuum dried at 62°C to constant weight to obtain a hydrophilic polyethylene non-woven fabric;

[0037] (3) Phenol, formaldehyde and barium hydroxide were mixed in a mass ratio of 0.9:1.2:4.5 and heated to 64°C. After reacting for 75 minutes, the temperature was raised to 74°C and the reaction was continued for 75 minutes. The temperature was again raised to 84°C and the reaction was continued for 40 minutes. Then, 0.2 times the mass of o-toluidine of the phenol was added and the reaction was continued for 5 hours. The mixture was transferred to a rotary evaporator and vacuum-evacuated at 61°C for 30 minutes. The mixture was cooled to room temperature to obtain a modified phenolic resin. Under a nitrogen atmosphere, the modified phenolic resin, 2,5-furandicarboxylic acid, TY-2 titanium catalyst and sulfonic acid catalyst HY-9025 were mixed in a mass ratio of 15:17:0.15:0.4. The mixture was heated to 185°C and dehydrated with nitrogen. After no water was discharged, the mixture was heated to 225°C and reacted for 14 hours to obtain polyether ester.

[0038] (4) Polyether ester and dimethylacetamide were mixed in a mass ratio of 1:19, stirred evenly, and lithium chloride (1.25 times the mass of the polyether alcohol) was added. After reacting for 5 hours, tributyl citrate was added. The mass ratio of polyether ester to tributyl citrate was 1:0.3. The mixture was transferred to a nitrogen atmosphere, heated to 130°C, and reacted for 40 hours to obtain a finishing agent.

[0039] (5) The hydrophilic polyethylene non-woven fabric is post-finished with a post-finishing agent. The hydrophilic polyethylene non-woven fabric is immersed in the post-finishing agent, heated to 75°C, reacted for 9 minutes, taken out and allowed to stand for 4 hours, then washed with deionized water 4 times, and finally vacuum-dried at 75°C to obtain a high-tenacity non-woven fabric for homogeneous bags.

[0040] Example 3

[0041] (1) A polyethylene non-woven fabric was irradiated with a nano-electron accelerator at a dose of 220 kGy, and then immersed in a glycidyl methacrylate solution, wherein the volume ratio of glycidyl methacrylate, methanol, and deionized water was 2:50:50. Nitrogen was passed through the system to remove oxygen, and then the system was sealed and heated to 65°C. After reacting for 4 hours, the fabric was removed and washed with deionized water 5 times, and then vacuum dried at 65°C to constant weight to obtain a modified polyethylene non-woven fabric.

[0042] (2) Polylactic acid and 1,4-dioxane were mixed in a mass ratio of 1:18 to 20, heated to 65°C, stirred evenly, and then a 1-2% 3-amino-1,2-propanediol aqueous solution (1.5 times the mass of the polylactic acid) was added dropwise at a rate of 3 ml / min, and the reaction was continued for 30 minutes to obtain hydrophilic polylactic acid; the modified polyethylene non-woven fabric was immersed in the hydrophilic polylactic acid, nitrogen was passed through the system to remove oxygen, and then the system was sealed, heated to 90°C, reacted for 6 hours, removed and washed with deionized water 5 times, and then vacuum dried at 65°C to constant weight to obtain a hydrophilic polyethylene non-woven fabric;

[0043] (3) Phenol, formaldehyde and barium hydroxide were mixed in a mass ratio of 1:1.2:4.5 and heated to 65°C. After reacting for 90 minutes, the temperature was raised to 75°C and the reaction was continued for 60 to 90 minutes. The temperature was again raised to 85°C and the reaction was continued for 50 minutes. Then, 0.3 times the mass of o-toluidine of the phenol was added and the reaction was continued for 8 hours. The mixture was transferred to a rotary evaporator and vacuum-evacuated at 62°C for 40 minutes. The mixture was cooled to room temperature to obtain a modified phenolic resin. Under a nitrogen atmosphere, the modified phenolic resin, 2,5-furandicarboxylic acid, TY-2 titanium catalyst and sulfonic acid catalyst HY-9025 were mixed in a mass ratio of 20:18:0.2:0.5. The mixture was heated to 190°C and dehydrated with nitrogen. After no water was discharged, the mixture was heated to 230°C and reacted for 20 hours to obtain polyether ester.

[0044] (4) Polyether ester and dimethylacetamide were mixed in a mass ratio of 1:20, stirred evenly, and lithium chloride (1.5 times the mass of the polyether alcohol) was added. After reacting for 6 hours, tributyl citrate was added. The mass ratio of polyether ester to tributyl citrate was 1:0.4. The mixture was transferred to a nitrogen atmosphere, heated to 135°C, and reacted for 48 hours to obtain a finishing agent.

[0045] (5) The hydrophilic polyethylene non-woven fabric is post-finished with a post-finishing agent. The hydrophilic polyethylene non-woven fabric is immersed in the post-finishing agent, heated to 90°C, reacted for 10 minutes, taken out and allowed to stand for 5 hours, then washed with deionized water 5 times, and finally vacuum-dried at 90°C to obtain a high-tenacity non-woven fabric for homogeneous bags.

[0046] Comparative Example 1

[0047] The prescription composition of Comparative Example 1 is the same as that of Example 2. The only difference between the method for preparing the high-toughness non-woven fabric for homogeneous bags and Example 2 is the difference in step (2), which is modified as follows: polylactic acid and 1,4-dioxane are mixed in a mass ratio of 1:19, heated to 63°C, and stirred evenly to prepare a polylactic acid solution; the modified polyethylene non-woven fabric is immersed in the polylactic acid solution, nitrogen is passed through the system to remove oxygen in the system, and then the system is sealed, heated to 85°C, reacted for 5 hours, removed and washed with deionized water 4 times, and then vacuum dried at 62°C to constant weight to prepare a hydrophilic polyethylene non-woven fabric.

[0048] Comparative Example 2

[0049] The prescription composition of Comparative Example 2 is the same as that of Example 2. The only difference between the method for preparing high-tenacity non-woven fabric for homogeneous bags and Example 2 is that the treatments of steps (1) and (2) are not performed, and step (5) is modified as follows: the polyethylene non-woven fabric is post-finished with a post-finishing agent, the hydrophilic polyethylene non-woven fabric is immersed in the post-finishing agent, the temperature is raised to 90°C, the reaction is carried out for 10 minutes, the fabric is taken out and allowed to stand for 5 hours, and then washed with deionized water 5 times, and finally vacuum dried at 90°C to obtain high-tenacity non-woven fabric for homogeneous bags.

[0050] Comparative Example 3

[0051] The formulation composition of Comparative Example 3 is the same as that of Example 2. The only difference between the method for preparing the high-tenacity non-woven fabric for homogeneous bags and Example 2 is that tributyl citrate is not introduced when preparing the modified polyether ester, and the polyether ester is the finishing agent.

[0052] Comparative Example 4

[0053] The prescription composition of comparative example 4 is the same as that of example 2. The difference between the method for making the high-toughness non-woven fabric for homogeneous bags and example 2 is only in the difference of steps (3) (4), which are modified as follows:

[0054] (3) Phenol, formaldehyde, and barium hydroxide were mixed in a mass ratio of 1:1.2:4.5 and heated to 65°C. After reacting for 90 minutes, the temperature was raised to 75°C and the reaction was continued for 60 to 90 minutes. The temperature was again raised to 85°C and the reaction was continued for 50 minutes. Then, o-toluidine (0.3 times the mass of phenol) was added and the reaction was continued for 8 hours. The mixture was transferred to a rotary evaporator and vacuum-evacuated at 62°C for 40 minutes. The mixture was cooled to room temperature to obtain a modified phenolic resin.

[0055] (4) The modified phenolic resin and dimethylacetamide were mixed in a mass ratio of 1:20, stirred evenly, and lithium chloride in an amount 1.25 times the mass of the modified phenolic resin was added. After reacting for 6 hours, tributyl citrate was added, and the mass ratio of the modified phenolic resin to tributyl citrate was 1:0.4. The mixture was transferred to a nitrogen atmosphere, heated to 135°C, and reacted for 48 hours to obtain a finishing agent.

[0056] Comparative Example 5

[0057] The formulation composition of Comparative Example 5 is the same as that of Example 2. The only difference between the method for making the high-tenacity non-woven fabric for homogeneous bags and that of Example 2 is that no post-finishing is performed, and the hydrophilic polyethylene non-woven fabric is the high-tenacity non-woven fabric for homogeneous bags.

[0058] Effect Examples

[0059] Table 1 below shows the performance analysis results of the high-tenacity non-woven fabrics for homogeneous bags using Examples 1 to 3 of the present invention and Comparative Examples 1 to 5:

[0060] Table 1

[0061]

[0062] By comparing the experimental data of the examples and the comparative examples in Table 1, it can be clearly found that the high-toughness non-woven fabrics for homogeneous bags prepared in Examples 1, 2, and 3 have good hydrophilicity and toughness.

[0063] From the comparison of the experimental data of Example 1, Example 2, Example 3 and Comparative Example 1 and Comparative Example 2, it can be found that the hydrophilic non-woven fabric prepared by first grafting glycidyl methacrylate on the surface of the polyethylene non-woven fabric by electron beam radiation and then reacting with hydrophilic polylactic acid has amide and also introduces a large number of hydrophilic hydroxyl groups to enhance the hydrophilicity of the polyethylene non-woven fabric;

[0064] From the comparison of the experimental data of Example 1, Example 2, Example 3 and Comparative Example 3, Comparative Example 4, and Comparative Example 5, it can be found that the phenolic resin reacts with o-toluidine, then reacts with 2,5-furandicarboxylic acid, and then reacts with tributyl citrate to obtain a modified polyether ester having a three-dimensional cross-linked network structure. The cross-linked network structure cured by the finishing agent is more uniform. After the modified polyether ester is post-finished on the surface of the composite non-woven fabric, hydrogen bonds are formed with the hydroxyl groups on the hydrophilic polyethylene non-woven fabric. After curing, a uniform three-dimensional network structure bonding layer is formed, which enhances the toughness of the non-woven fabric.

[0065] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed therein. Any reference in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A high-tenacity non-woven fabric for homogeneous bags, characterized in that: The high-tenacity non-woven fabric for homogeneous bags is obtained by post-finishing a hydrophilic polyethylene non-woven fabric with a post-finishing agent; the post-finishing agent is a modified polyether ester; the hydrophilic polyethylene non-woven fabric is first grafted with glycidyl methacrylate on the surface of the polyethylene non-woven fabric by electron beam radiation, and then reacted with hydrophilic polylactic acid; the hydrophilic polylactic acid is obtained by reacting 3-amino-1,2-propanediol with polylactic acid; the modified polyether ester is obtained by reacting a modified phenolic resin with 2,5-furandicarboxylic acid and then reacting with tributyl citrate; the modified phenolic resin is obtained by reacting a phenolic resin with o-toluidine.

2. A method for preparing a high-toughness non-woven fabric for homogeneous bags, characterized in that: The method for preparing the high-toughness non-woven fabric for homogeneous bags comprises the following specific steps: (1) After irradiating a polyethylene non-woven fabric with a nano-electron accelerator, the fabric was immersed in a glycidyl methacrylate solution, nitrogen was passed through the system to remove oxygen, and the system was sealed. The temperature was raised to 62-65°C, and the reaction was continued for 2-4 hours. The fabric was then removed and washed with deionized water for 3-5 times, and then vacuum dried at 60-65°C to a constant weight to obtain a modified polyethylene non-woven fabric. (2) Immerse the modified polyethylene non-woven fabric in hydrophilic polylactic acid, pass nitrogen to remove oxygen in the system, seal it, heat it to 80-90°C, react for 4-6 hours, remove it and wash it with deionized water 3-5 times, and then vacuum dry it at 60-65°C to constant weight to obtain a hydrophilic polyethylene non-woven fabric; (3) Under nitrogen atmosphere, the modified phenolic resin, 2,5-furandicarboxylic acid, TY-2 titanium catalyst and sulfonic acid catalyst HY-9025 were mixed in a mass ratio of 10-20:15-18:0.1-0.2:0.3-0.5, the mixture was heated to 180-190°C, nitrogen was passed through to remove water, and after no water was discharged, the mixture was heated to 220-230°C and reacted for 8-20 hours to obtain polyether ester; (4) Polyether ester and dimethylacetamide were mixed in a mass ratio of 1:18-20, stirred evenly, and lithium chloride was added in an amount of 1-1.5 times the mass of the polyether ester. After reacting for 4-6 hours, tributyl citrate was added, and the mixture was transferred to a nitrogen atmosphere, heated to 125-135°C, and reacted for 35-48 hours to obtain a finishing agent. (5) The hydrophilic polyethylene non-woven fabric is post-finished with a post-finishing agent to obtain a high-tenacity non-woven fabric for homogeneous bags.

3. The method for preparing a high-toughness non-woven fabric for homogeneous bags according to claim 2, characterized in that: In the above step (1), the irradiation dose is 180-220 kGy; and in the glycidyl methacrylate solution, the volume ratio of glycidyl methacrylate, methanol and deionized water is 1-2:50:

50.

4. The method for preparing a high-toughness non-woven fabric for homogeneous bags according to claim 2, characterized in that: In the above step (2): the preparation method of hydrophilic polylactic acid is as follows: polylactic acid and 1,4-dioxane are mixed in a mass ratio of 1:18~20, the temperature is raised to 60~65°C, and after stirring evenly, a 1~2% mass fraction of 3-amino-1,2-propanediol aqueous solution of 1.3~1.5 times the mass of the polylactic acid is added dropwise at a rate of 1~3 ml / min, and the reaction is continued for 20~30 minutes to obtain hydrophilic polylactic acid.

5. The method for preparing a high-toughness non-woven fabric for homogeneous bags according to claim 2, characterized in that: In the above step (3): the preparation method of the modified phenolic resin is as follows: phenol, formaldehyde and barium hydroxide are mixed in a mass ratio of 0.7~1:1.2:4.5 and the temperature is raised to 62~65°C, reacted for 60~90 minutes, then the temperature is raised to 72~75°C, the reaction is continued for 60~90 minutes, the temperature is again raised to 82~85°C, the reaction is continued for 30~50 minutes, 0.1~0.3 times the mass of o-toluidine of phenol is added, the reaction is continued for 3~8 hours, the mixture is transferred to a rotary evaporator, vacuum-evacuated at 60~62°C for 20~40 minutes, and cooled to room temperature to obtain the modified phenolic resin.

6. The method for preparing a high-toughness non-woven fabric for homogeneous bags according to claim 2, characterized in that: In the above step (4), the mass ratio of polyether ester to tributyl citrate is 1:0.2~0.

4.

7. The method for preparing a high-toughness non-woven fabric for homogeneous bags according to claim 2, characterized in that: In the above step (5): during post-finishing: immerse the hydrophilic polyethylene non-woven fabric in the post-finishing agent, heat it to 60~90℃, react for 8~10min, remove it and let it stand for 3~5h, then wash it with deionized water 3~5 times, and finally vacuum dry it at 60~90℃.

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