Easily-dyed high-strength fabric and preparation method thereof

Abstract

The invention discloses an easy-to-dye high-strength fabric and a preparation method thereof, and relates to the technical field of fabric processing. The preparation method comprises the following steps: firstly, intercalating acrylamide and maleic anhydride monomers into a montmorillonite sheet layer, and then polymerizing to modify montmorillonite so as to prepare a hybrid filler; the compatibility of the hybrid filler and polypropylene is greatly improved, and the amino groups on the hybrid filler and montmorillonite have a synergistic effect, so that enough polar groups are provided to be combined with dye molecules, and the diffusion and absorption of the dye molecules are facilitated; secondly, dimethyl isophthalate-5-sodium sulfonate is added into the polypropylene for modification, and dopamine is combined, so that the strength of the polypropylene is improved, and meanwhile, an anion functional group of a sulfonic acid group is reserved, and the sulfonic acid group can be subjected to efficient ion exchange with a cationic dye; and the formed polydopamine can promote partial conversion of polypropylene from a common alpha crystal form to a beta crystal form under the action of double screws, so that the prepared fabric has higher strength. The prepared fabric has the effects of being easy to dye and high in strength.

Description

Technical Field

[0001] The present invention relates to the technical field of fabric processing, and specifically provides an easily dyeable high-strength fabric and a preparation method thereof. Background Art

[0002] Polypropylene fibers are difficult to dye because they are prone to crystallization, with regular molecular chain arrangements, making it difficult for dye molecules to bind to the fiber surface and interior. Moreover, the polypropylene molecular chain does not contain polar groups, making it difficult to combine with dye molecules. To enable dyes to enter the fiber surface and interior, several methods have been attempted. The first method is surface treatment. By methods such as plasma method, corona discharge method, and impregnation method, the fiber surface is made to carry polar groups, which combine with dye molecules, thus endowing it with dyeing properties. However, the surface treatment modification method is difficult to produce continuously, and the modification effect is not very good, making it difficult to achieve industrial production. The second method is copolymerization. Since propylene is a gas, it has high requirements for catalysts. Adding a second monomer will reduce the catalytic efficiency. Therefore, it is difficult to directly carry out block copolymerization. The graft copolymerization method is commonly used to graft dyeing sites onto the polypropylene macromolecular chain, so that the fiber molecules have dyeing properties. Radiation, oxidation, and heating methods are commonly used to graft dyeing sites, but the processing is cumbersome, and it has a greater impact on the mechanical properties of polypropylene fibers during the graft copolymerization process, unable to meet actual needs and difficult to industrialize. The third method is the blending method, that is, adding a dyeable component to the polypropylene fiber to form a dye acceptor on the fiber surface and interior, thus endowing it with dyeing properties. Commonly used additives include low-molecular compounds, high-molecular compounds, and metal salt compounds. Regardless of the additive used, it is necessary to solve the problems of compatibility between the additive and polypropylene molecules and processing fluidity. On the one hand, it is necessary to disrupt the crystallization behavior of polypropylene fibers during the forming process, and at the same time, not damage the mechanical properties of the fibers. It is difficult to balance these two aspects. Moreover, low-molecular additives also have the disadvantages of too low viscosity and too fast flow; in addition to fast flow, metal salt additives are only applicable to dark dyes, with a narrow application range.

[0003] The present invention combines blending and grafting, can ensure the strength and properties of polypropylene fibers while improving dyeing properties, and solves the problems of compatibility and flow properties through modification and copolymerization. Summary of the Invention

[0004] The purpose of the present invention is to provide an easily dyeable high-strength fabric and a preparation method thereof to solve the problems existing in the prior art.

[0005] To solve the above technical problems, the present invention provides the following technical solution: An easily dyeable high-strength fabric, which is made by adding self-made hybrid filler into modified polypropylene and then spinning this polypropylene.

[0006] Further, the hybrid filler is prepared by intercalating acrylamide and maleic anhydride monomers into montmorillonite lamellae and then polymerizing to modify montmorillonite.

[0007] Further, the modified polypropylene is prepared by adding sodium dimethyl isophthalate-5-sulfonate into polypropylene for modification, grafting it into the polymer macromolecular chain through hydrogen bond binding, and then combining with dopamine.

[0008] Further, a preparation method of an easily dyeable high-strength fabric includes the following preparation steps:

[0009] (1) Mix organic montmorillonite, maleic anhydride monomer, acrylamide monomer, potassium persulfate and cyclohexanone in a certain proportion, stir evenly at a speed of 120 rpm for 30 min, heat and react at 60-80 °C for 1-2 h in a nitrogen atmosphere, then precipitate the reaction product in a precipitant solution, purify it, dry it in an oven at 50 °C for 2 h to obtain a mixed filler; dissolve the dried mixed filler in an organic solution with a solid-liquid ratio of 1:5, then dropwise add a saturated methanol solution of alkali into the solution until the generated ionomer no longer precipitates from the solution, perform vacuum filtration, wash the obtained solid with deionized water twice, then put it into an oven and dry it at 50 °C for 2 h, and then grind it into particles with a particle size of 60-200 nm to finally obtain a hybrid filler;

[0010] (2) Weigh 90-100 parts of polypropylene, 4-6 parts of sodium dimethyl isophthalate-5-sulfonate, 6-14 parts of dopamine, and 0.03-0.06 parts of benzoyl peroxide; put the weighed raw materials into a high-speed stirrer, first stir at a low speed of 60 rpm for 10 min, then stir at a high speed of 600 rpm for 20 min, and then add 4-10 parts of the hybrid filler and continue to stir at a speed of 600 rpm for 20 min to uniformly mix all raw materials; put the uniformly mixed raw materials into a reactive twin-screw extruder, with a screw extrusion temperature of 200-210 °C, after melt mixing, extrude, cool, draw into strips and pelletize to obtain modified polypropylene particles;

[0011] (3) Put the blended particles into a vacuum dryer, set the drying temperature to 110 °C, after drying for 3 h, take them out and put them into a spinning screw extruder, set the screw extrusion temperature to 220 °C, extrude into melt fibers through melt spinning and enter a spinneret with 24 holes in the spinneret assembly, then cool and blow with a cooling air with a wind temperature of 25 °C and a blowing speed of 1.0 m / min, then stretch through a hot roller at 60 °C with a stretching ratio of 1.8 times, and then wind and form the modified polypropylene fiber, and weave it into a fabric, which is an easily dyeable high-strength fabric.

[0012] Further, in the step (1), the mass ratio of the organic montmorillonite, maleic anhydride monomer, acrylamide monomer, potassium persulfate and cyclohexanone is 3-7:6-10:6-18:0.6-1.0:12-20.

[0013] Further, in the step (1), the organic solution is 1,4-dioxane.

[0014] Further, in the step (2), the stirring temperature is controlled at 85-105 °C throughout the process.

[0015] Further, in the step (2), the particle size of the modified polypropylene particles is 20 μm.

[0016] Further, in the step (3), the vacuum degree of the vacuum dryer is 0.05-0.10 MPa.

[0017] Further, in the step (3), the gram weight of the fabric is 200-300 g / m 3 。

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0019] In the present invention, the hybrid filler is prepared and added into the modified polypropylene, and the polypropylene is spun into a fabric to achieve the effects of easy dyeing and high strength.

[0020] First, acrylamide and maleic anhydride monomers are used to intercalate them into the montmorillonite lamellae and then polymerize to modify the montmorillonite to prepare the hybrid filler; through the intercalation of acrylamide, the compatibility between montmorillonite and polypropylene is greatly improved, further strengthening the strength improvement of montmorillonite on polypropylene, and also solving the influence of the addition of inorganic fillers on the compatibility and processing fluidity of polypropylene. At the same time, the amino group on acrylamide and montmorillonite act synergistically to provide enough polar groups to combine with dye molecules. Under the action of the twin-screw, the acrylyl functional groups contained in it generate partial graft copolymers with polypropylene, disrupting the crystallization process of polypropylene fibers and breaking the orientation and crystallization of the macromolecular chains in the polypropylene fibers, which is beneficial to the diffusion and absorption of dye molecules;

[0021] Secondly, dimethyl isophthalate-5-sulfonate is added to polypropylene for modification. It is grafted onto the polymer macromolecular chain through hydrogen bonding, and then combined with dopamine. The hydroxyl group connects dimethyl isophthalate-5-sulfonate and polypropylene graft, and the three form a cross-linking, improving the strength of polypropylene while retaining the sulfonic acid group, an anionic functional group, and a large number of active groups, enabling the prepared fabric to conduct ion exchange with cationic dyes under low-temperature conditions, so that the cationic dyes can enter the surface and interior of the fiber; and dopamine will self-polymerize during the process, and the formed polydopamine can promote the partial transformation of polypropylene from the ordinary α crystal form to the β crystal form under the action of a twin-screw extruder, greatly improving the various properties of polypropylene and making the prepared fabric have higher strength. Detailed implementation mode

[0022] 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 a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0023] In order to more clearly illustrate the method provided by the present invention, the following embodiments are used for detailed description. The test methods for each index of an easily dyeable and high-strength fabric prepared in the following embodiments are as follows:

[0024] Dyeing performance: Cut the sample fabric into a size of 10 cm×10 cm, and then conduct an over-dyeing test on the sample. The dyeing temperature is 100 °C, the temperature difference range is controlled within ±5 °C, and the cationic dye Red X-8GRL is used for boiling dyeing at atmospheric pressure for 3.5 h, with a bath ratio of 1:50 and a pH value of 4.8. Test the dye mass concentration and color yield in the fabric fiber.

[0025] Strength: Cut the sample fabric into a size of 10 cm×10 cm, and the tensile strength is detected according to the standard "ASTM D5034-2017".

[0026] Example 1

[0027] (1) Mix the organophilic montmorillonite, maleic anhydride monomer, acrylamide monomer, potassium persulfate, and cyclohexanone in a mass ratio of 3:6:6:0.6:12, stir evenly at a speed of 120 rpm for 30 min, heat and react at 60 °C for 1 h in a nitrogen atmosphere, then precipitate the reaction product in a precipitant solution, purify it, and dry it in an oven at 50 °C for 2 h to obtain a mixed filler; dissolve the dried mixed filler in a 1,4-dioxane solution with a solid-liquid ratio of 1:5, then dropwise add a saturated methanol solution of alkali to the solution until the formed ionomer no longer precipitates from the solution, perform vacuum filtration, wash the obtained solid twice with deionized water, then put it into an oven and dry it at 50 °C for 2 h, and then grind it into particles with a particle size of 60 nm to finally obtain a hybrid filler;

[0028] (2) Weigh 90 parts of polypropylene, 4 parts of dimethyl isophthalate-5-sulfonate, 6 parts of dopamine, and 0.03 parts of benzoyl peroxide; put the weighed raw materials into a high-speed stirrer, first stir at a low speed of 60 rpm for 10 min, then stir at a high speed of 600 rpm for 20 min, and then add 4 parts of the hybrid filler and continue to stir at a speed of 600 rpm for 20 min, controlling the stirring temperature at 85 °C throughout the process to make all raw materials evenly mixed; put the evenly mixed raw materials into a reactive twin-screw extruder, with a screw extrusion temperature of 200 °C, after melt mixing, extrude, cool, draw into strips, and pelletize to obtain modified polypropylene particles with a particle size of 20 μm;

[0029] (3) Put the blended particles into a vacuum dryer with a vacuum degree of 0.05 MPa, set the drying temperature at 110 °C, after drying for 3 h, take them out and put them into a spinning screw extruder, set the screw extrusion temperature at 220 °C, extrude into melt fibers through melt spinning and enter a spinneret with 24 holes in the spinneret assembly, then cool and blow with a cooling air with a wind temperature of 25 °C and a blowing speed of 1.0 m / min, then stretch through a hot roll at 60 °C with a stretching ratio of 1.8 times, and then wind and form the modified polypropylene fiber, and weave it into a fabric with a gram weight of 200 g / m 3 to obtain an easily dyed and high-strength fabric.

[0030] Example 2

[0031] (1) Mix the organic montmorillonite, maleic anhydride monomer, acrylamide monomer, potassium persulfate and cyclohexanone in a mass ratio of 5:8:12:0.8:16, stir evenly at a speed of 120 rpm for 30 min, heat and react at 70 °C for 1.5 h in a nitrogen atmosphere, and then precipitate the reaction product in a precipitant solution. After purification and drying in an oven at 50 °C for 2 h, a mixed filler is obtained; dissolve the dried mixed filler in a 1,4-dioxane solution with a solid-liquid ratio of 1:5, and then dropwise add a saturated methanol solution of alkali to the solution until the formed ionomer no longer precipitates from the solution. Filter by vacuum, wash the obtained solid with deionized water twice, then put it into an oven and dry at 50 °C for 2 h, and then grind it into particles with a particle size of 130 nm to finally obtain a hybrid filler;

[0032] (2) Weigh 95 parts of polypropylene, 5 parts of dimethyl isophthalate-5-sulfonate, 10 parts of dopamine, and 0.045 parts of benzoyl peroxide; put the weighed raw materials into a high-speed stirrer, first stir at a low speed of 60 rpm for 10 min, then stir at a high speed of 600 rpm for 20 min, and then add 7 parts of the hybrid filler and continue to stir at a speed of 600 rpm for 20 min. Control the stirring temperature at 95 °C throughout the process to make all raw materials evenly mixed; put the evenly mixed raw materials into a reactive twin-screw extruder, the screw extrusion temperature is 205 °C, after melting and mixing, extrude, cool, draw into strips and pelletize to obtain modified polypropylene particles with a particle size of 20 μm;

[0033] (3) Put the blended particles into a vacuum dryer with a vacuum degree of 0.075 MPa, set the drying temperature at 110 °C, after drying for 3 h, take them out and put them into a spinning screw extruder, set the screw extrusion temperature at 220 °C, extrude into melt fibers through melt spinning and enter a spinneret with 24 holes in the spinneret assembly, and then cool and blow with a cooling air with a wind temperature of 25 °C and a blowing speed of 1.0 m / min, and then stretch through a hot roller at 60 °C with a stretching ratio of 1.8 times, and then wind and form the modified polypropylene fiber, and weave it into a fabric with a grammage of 250 g / m 3 to obtain an easily dyeable and high-strength fabric.

[0034] Example 3

[0035] (1) Mix the organic montmorillonite, maleic anhydride monomer, acrylamide monomer, potassium persulfate and cyclohexanone according to the mass ratio of 7:10:18:1.0:20, stir evenly at a speed of 120 rpm for 30 min, heat and react at 80 °C for 2 h in a nitrogen atmosphere, and then precipitate the reaction product in a precipitant solution. After purification and drying in an oven at 50 °C for 2 h, a mixed filler is obtained; dissolve the dried mixed filler in a 1,4-dioxane solution with a solid-liquid ratio of 1:5, and then dropwise add a saturated methanol solution of alkali to the solution until the formed ionomer no longer precipitates from the solution. Filter by vacuum, wash the obtained solid with deionized water twice, then put it into an oven and dry at 50 °C for 2 h, and then grind it into particles with a particle size of 200 nm to finally obtain a hybrid filler;

[0036] (2) Weigh 100 parts of polypropylene, 6 parts of dimethyl isophthalate-5-sulfonate, 14 parts of dopamine, and 0.06 parts of benzoyl peroxide; put the weighed raw materials into a high-speed stirrer, first stir at a low speed of 60 rpm for 10 min, then stir at a high speed of 600 rpm for 20 min, and then add 10 parts of the hybrid filler and continue to stir at a speed of 600 rpm for 20 min. Control the stirring temperature at 105 °C throughout the process to make all raw materials evenly mixed; put the evenly mixed raw materials into a reactive twin-screw extruder, the screw extrusion temperature is 210 °C, after melting and mixing, extrude, cool, draw into strips and pelletize to obtain modified polypropylene particles with a particle size of 20 μm;

[0037] (3) Put the blended particles into a vacuum dryer with a vacuum degree of 0.10 MPa, set the drying temperature at 110 °C, after drying for 3 h, take them out and put them into a spinning screw extruder, set the screw extrusion temperature at 220 °C, extrude into melt fibers through melt spinning and enter a spinneret with 24 holes in the spinneret assembly, and then cool and blow with a cooling air with a wind temperature of 25 °C and a blowing speed of 1.0 m / min, and then stretch by a hot roller at 60 °C with a stretching ratio of 1.8 times, and then wind and form the modified polypropylene fiber, and weave it into a fabric with a gram weight of 300 g / m 3 to obtain an easily dyed and high-strength fabric.

[0038] Comparative Example 1

[0039] The difference between Comparative Example 1 and Example 2 lies in step (1). Step (1) is changed to: Mix organophilic montmorillonite, maleic anhydride monomer, potassium persulfate, and cyclohexanone in a mass ratio of 5:8:0.8:16, stir evenly at a speed of 120 rpm for 30 min, heat and react at 70 °C for 1.5 h in a nitrogen atmosphere, then precipitate the reaction product in a precipitant solution, purify it, dry it in an oven at 50 °C for 2 h to obtain a mixed filler; dissolve the dried mixed filler in a 1,4-dioxane solution with a solid-liquid ratio of 1:5, then dropwise add a saturated methanol solution of alkali to the solution until the formed ionomer no longer precipitates from the solution, perform vacuum filtration, wash the obtained solid with deionized water twice, then put it into an oven and dry it at 50 °C for 2 h, and then grind it into particles with a particle size of 130 nm to finally obtain a hybrid filler; the remaining steps are the same as those in Example 2.

[0040] Comparative Example 2

[0041] The difference between Comparative Example 2 and Example 2 lies in step (1). Step (1) is changed to: Mix organophilic montmorillonite, acrylamide monomer, potassium persulfate, and cyclohexanone in a mass ratio of 5:12:0.8:16, stir evenly at a speed of 120 rpm for 30 min, heat and react at 70 °C for 1.5 h in a nitrogen atmosphere, then precipitate the reaction product in a precipitant solution, purify it, dry it in an oven at 50 °C for 2 h to obtain a mixed filler; dissolve the dried mixed filler in a 1,4-dioxane solution with a solid-liquid ratio of 1:5, then dropwise add a saturated methanol solution of alkali to the solution until the formed ionomer no longer precipitates from the solution, perform vacuum filtration, wash the obtained solid with deionized water twice, then put it into an oven and dry it at 50 °C for 2 h, and then grind it into particles with a particle size of 130 nm to finally obtain a hybrid filler; the remaining steps are the same as those in Example 2.

[0042] Comparative Example 3

[0043] The difference between Comparative Example 3 and Example 2 lies in step (2). Step (2) is changed to: Weigh 95 parts of polypropylene, 10 parts of dopamine, and 0.045 parts of benzoyl peroxide; put the weighed raw materials into a high-speed stirrer, first stir at a low speed of 60 rpm for 10 min, then stir at a high speed of 600 rpm for 20 min, then add 7 parts of the hybrid filler, and continue to stir at a speed of 600 rpm for 20 min. Control the stirring temperature at 95 °C throughout the process to make the various raw materials evenly mixed; put the evenly mixed raw materials into a reactive twin-screw extruder, with the screw extrusion temperature at 205 °C. After melting and mixing, extrude, cool, draw into strips, and pelletize to obtain modified polypropylene particles with a particle size of 20 μm; the remaining steps are the same as those in Example 2.

[0044] Comparative Example 4

[0045] The difference between Comparative Example 4 and Example 2 is that step (2) is not included, and step (2) is changed to: Weigh 95 parts of polypropylene, 5 parts of sodium dimethyl isophthalate-5-sulfonate, and 0.045 parts of benzoyl peroxide; put the weighed raw materials into a high-speed stirrer, first stir at a low speed of 60 rpm for 10 min, then stir at a high speed of 600 rpm for 20 min, then add 7 parts of hybrid filler, and continue to stir at a speed of 600 rpm for 20 min. Control the stirring temperature at 95°C throughout the process to make all raw materials evenly mixed; put the evenly mixed raw materials into a reactive twin-screw extruder, the screw extrusion temperature is 205°C, after melting and mixing, extrude, cool, draw into strips, and pelletize to obtain modified polypropylene particles with a particle size of 20 μm; the remaining steps are the same as those in Example 2.

[0046] Effect Example

[0047] The following Table 1 gives the performance analysis results of an easily dyed high-strength fabric using Examples 1 to 3 and Comparative Examples 1 to 4 of the present invention.

[0048] Table 1

[0049]

[0050] From the comparison of the experimental data of the dyeing performance of the examples and comparative examples, it can be found that the present invention first uses acrylamide and maleic anhydride monomers to intercalate them into the montmorillonite lamellae and then polymerize to modify the montmorillonite to prepare a hybrid filler; through the intercalation of acrylamide, the compatibility between montmorillonite and polypropylene is greatly improved, further strengthening the strength improvement brought by montmorillonite to polypropylene, and also solving the influence of the addition of inorganic fillers on the compatibility and processing fluidity of polypropylene. At the same time, the amino group on acrylamide and montmorillonite act synergistically to provide enough polar groups to bind with dye molecules. Under the action of the twin-screw, the acrylyl functional groups contained in it generate partial graft copolymers with polypropylene, disrupting the crystallization process of polypropylene fibers and breaking the orientation and crystallization of the macromolecular chains in the polypropylene fibers, which is beneficial to the diffusion and absorption of dye molecules. Secondly, adding sodium dimethyl isophthalate-5-sulfonate into polypropylene for modification, grafting it into the polymer macromolecular chain through hydrogen bonding, and then combining with dopamine, the hydroxyl group connects sodium dimethyl isophthalate-5-sulfonate and polypropylene grafting, and the three form a cross-linking, improving the strength of polypropylene while retaining the sulfonic acid group, this anionic functional group and a large number of active groups, so that the prepared fabric can perform ion exchange with cationic dyes under low-temperature conditions, so that the cationic dyes enter the fiber surface and interior. From the comparison of the experimental data of the strength of the examples and comparative examples, it can be found that the dopamine added in the present invention will self-polymerize during the process, and the formed polydopamine can promote the partial transformation of polypropylene from the ordinary α crystal form to the β crystal form under the action of the twin-screw, greatly improving the various properties of polypropylene, making the prepared fabric have higher strength.

[0051] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. An easy-to-dye high-strength fabric, characterized in that: The fabric is prepared by adding self-made hybrid filler into modified polypropylene and spinning the polypropylene.

2. The easy-to-dye high-strength fabric according to claim 1, characterized in that: The hybrid filler is prepared by using acrylamide and maleic anhydride monomers, inserting them into montmorillonite sheets and then polymerizing them to modify the montmorillonite.

3. The easy-to-dye high-strength fabric according to claim 1, characterized in that: The modified polypropylene is prepared by adding sodium 5-sulfonate dimethyl isophthalate into polypropylene for modification, grafting it into the polymer macromolecular chain through hydrogen bonding, and then combining it with dopamine.

4. A method for preparing an easily dyeable high-strength fabric, characterized in that: The method comprises the following preparation steps: (1) organic montmorillonite, maleic anhydride monomer, acrylamide monomer, potassium persulfate and cyclohexanone are mixed in a certain proportion, stirred at 120 rpm for 30 min, heated at 60-80° C. for 1-2 h in a nitrogen atmosphere, and then the reaction product is precipitated in a precipitant solution, purified, and dried in a drying oven at 50° C. for 2 h to obtain a mixed filler; the dried mixed filler is dissolved in an organic solution at a solid-liquid ratio of 1:5, and then a saturated methanol solution of alkali is added dropwise to the solution until the generated ionomer is no longer precipitated from the solution, vacuum filtered, and the obtained solid is washed twice with deionized water, and then placed in a drying oven at 50° C. for 2 h, and then ground into particles with a particle size of 60-200 nm to finally obtain a hybrid filler; (2) Weighing 90-100 parts of polypropylene, 4-6 parts of sodium isophthalate-5-sulfonate, 6-14 parts of dopamine, and 0.03-0.06 parts of benzoyl peroxide; putting the weighed raw materials into a high-speed stirrer, stirring at a low speed of 60 rpm for 10 minutes, and then stirring at a high speed of 600 rpm for 20 minutes, and then adding 4-10 parts of hybrid filler, and continuing to stir at a speed of 600 rpm for 20 minutes to uniformly mix the various raw materials; putting the uniformly mixed raw materials into a reactive twin-screw extruder, the screw extrusion temperature is 200-210° C., after melt mixing, extruding, cooling, drawing, and pelletizing to obtain modified polypropylene particles; (3) The blended particles are put into a vacuum dryer and the drying temperature is set to 110°C. After drying for 3 hours, the blended particles are taken out and put into a spinning screw extruder and the screw extrusion temperature is set to 220°C. The particles are melt-spinned and then extruded into a molten fiber through a spinneret assembly having 24 holes. The particles are then cooled by cooling air at a temperature of 25°C and a blowing speed of 1.0 m / min. The particles are then stretched by a hot roller at 60°C with a stretching multiple of 1.8 times. The particles are then wound into a modified polypropylene fiber and woven into a fabric, i.e., an easily dyeable high-strength fabric.

5. The method for preparing an easily dyeable high-strength fabric according to claim 4, characterized in that: In the step (1), the mass ratio of the organic montmorillonite, maleic anhydride monomer, acrylamide monomer, potassium persulfate and cyclohexanone is 3-7: 6-10: 6-18: 0.6-1.0: 12-20.

6. The method for preparing an easily dyeable high-strength fabric according to claim 4, characterized in that: The organic solution in step (1) is 1,4-dioxane.

7. The method for preparing an easily dyeable high-strength fabric according to claim 4, characterized in that: In the step (2), the stirring temperature is controlled at 85-105°C throughout the entire process.

8. The method for preparing an easily dyeable high-strength fabric according to claim 4, characterized in that: The particle size of the modified polypropylene particles in step (2) is 20 μm.

9. The method for preparing an easily dyeable high-strength fabric according to claim 4, characterized in that: The vacuum degree of the vacuum dryer in step (3) is 0.05-0.10 MPa.

10. The method for preparing an easily dyeable high-strength fabric according to claim 4, characterized in that: The weight of the fabric in step (3) is 200-300 g / m 3 .

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