CN118206874B - Flame-retardant anti-dripping chemical fiber master batch and preparation process thereof - Google Patents

Abstract

The invention relates to a flame-retardant anti-dripping chemical fiber master batch and a preparation process thereof, and belongs to the technical field of chemical fiber materials. According to the invention, the water hyacinth fiber is modified by using the mixture of graphite alkyne, ammonium hypophosphite, silicon dioxide and melamine, so that the flame retardance, stability and anti-dripping performance of the prepared chemical fiber master batch are improved; according to the preparation method, the modified water hyacinth fiber and the polysulfonamide are mixed in the preparation process, and the strong electron-withdrawing sulfonyl existing on the main chain of the polysulfonamide macromolecule endows the polysulfonamide fiber with excellent heat-resistant stability through the double bond conjugation of the benzene ring, so that the anti-dripping performance of the prepared chemical fiber master batch is further improved by mixing the two components; according to the invention, the flame retardant property of the anti-dripping chemical fiber master batch is further improved by adding the calcium alginate, because calcium ions are converted into calcium carbonate and calcium oxide when the calcium alginate burns, the substances play a role of a barrier in the combustion process, and the conversion process absorbs heat, so that the flame retardant efficiency is further improved.

Description

A flame retardant and anti-drip chemical fiber masterbatch and its preparation process

Technical Field

The invention belongs to the technical field of chemical fiber materials and relates to a flame retardant and anti-melt drop chemical fiber masterbatch and a preparation process thereof.

Background Art

Thermoplastic materials are widely used in textiles and clothing, daily necessities and industrial products. However, the molten drips during burning can spread flames and ignite other substances. If they stick to the skin, they will cause skin burns. This greatly limits their application in clothing fabrics, decorative fabrics and industrial textiles. Therefore, flame retardancy and anti-melt dripping are issues that researchers have been constantly exploring.

At present, the flame retardant and anti-drip methods include blending, copolymerization, post-treatment, grafting and cross-linking. The blending method mainly adds anti-drip agent powder to increase the melt viscosity to reduce the dripping phenomenon. This method does not change the production process used, is simple and easy to implement, and has a wide range of applications.

Therefore, a flame retardant and anti-melt dripping masterbatch and a preparation method thereof are sought. A flame retardant and anti-melt dripping chemical fiber masterbatch is prepared by blending, extruding and granulating using a twin-screw extruder. The masterbatch is used in the production of plastics and fiber materials. The masterbatch has excellent flame retardant and anti-melt dripping functions and a wide range of applications, including packaging materials, decorative materials, non-woven fabrics, textiles and clothing, and other fields.

Summary of the invention

The purpose of the present invention is to provide a flame retardant and anti-melt dripping chemical fiber masterbatch and a preparation process thereof, which has the characteristics of good flame retardant effect, strong antibacterial property and long service life.

The purpose of the present invention can be achieved through the following technical solutions:

A flame retardant and anti-melt dripping chemical fiber masterbatch, the formula of the flame retardant and anti-melt dripping chemical fiber masterbatch is as follows, in parts by weight, 30-40 parts of modified water hyacinth fiber, 30-40 parts of aromatic sulfone fiber, 10-15 parts of calcium alginate, 5-10 parts of anti-dripping agent, 1-5 parts of dispersant, 1-2 parts of coupling agent, 1-2 parts of smoothing agent, 1-2 parts of lubricating oil,

The preparation process of modified water hyacinth fiber is as follows:

S1: Wash the water hyacinth, dry it and grind it in a ball mill at a speed of 400 r/min for 4 h. Soak the ground powder in 100 °C water for 12 h to obtain a mixed solution A.

S2: After the mixed solution A is cooled to 50°C, it is placed in a homogenizer and homogenized at 10 MPa for 20 min, and then centrifuged at 12000 r/min to remove excess water, filtered, and dried at 110°C for 12 h to obtain particle B;

S3: The particle B prepared in S2 is immersed in a mixed solution of toluene and anhydrous ethanol in a volume ratio of 1:3 at 50°C for 12 hours, filtered and washed to obtain particle C;

S4: Add particle C into alkali solution with a concentration of 30%, stir at a speed of 300 r/min for 4 hours, filter and wash to obtain particle D;

S5: adding particle D to a mixed solution of sodium chlorite and glacial acetic acid in a volume ratio of 1:4, stirring at a speed of 300 r/min for 5 h, filtering and washing, and obtaining particle E;

S6: adding the particle E to a mixed solution of tetrabutylammonium hydroxide, urea and deionized water in a volume ratio of 5:3:12, stirring at a speed of 300 r/min for 2 hours, filtering, collecting the filtrate, centrifuging the filtrate at a speed of 12000 r/min using a centrifuge, filtering, and drying at 80°C for 12 hours to obtain water hyacinth fiber;

S7: Graphene, ammonium hypophosphite, silicon dioxide and melamine were mixed in a mass ratio of 1:2:2:1, mixed evenly, and then put into a ball mill and ground at a speed of 300 r/min for 1 h to obtain a mixture F;

S8: The water hyacinth fiber prepared in S6 and the mixture F prepared in S7 are mixed in a mass ratio of 8:1, put into a ball mill, and grind at a speed of 400 r/min under a nitrogen atmosphere for 2 hours to obtain the modified water hyacinth fiber.

Furthermore, the anti-dripping agent is polytetrafluoroethylene.

Furthermore, the dispersant is polyethylene glycol with a molecular weight of 10,000 to 20,000.

Furthermore, the coupling agent is one or more of vinyltriethoxysilane and vinyltrimethoxysilane.

Furthermore, the lubricant is one or more of stearic acid, polyethylene wax, and polypropylene wax.

Furthermore, the alkali solution in S4 is one or more of sodium hydroxide and potassium hydroxide.

Furthermore, the modified water hyacinth fiber obtained in S8 has a particle size of 200 meshes.

A preparation process of a flame retardant and anti-melt droplet chemical fiber masterbatch, the specific process of the preparation process is as follows:

S81: Put the modified water hyacinth fiber, aromatic sulfone fiber and calcium alginate into a ball mill according to the proportion and grind them at a speed of 400 r/min for 1 hour, introduce nitrogen gas with a flow rate of 10 m/s for 2 hours, then add an anti-dripping agent, a dispersant, a coupling agent, a smoothing agent and a lubricating oil and continue stirring at a stirring rate of 300 r/min to obtain a mixture;

S82: The mixture obtained in S81 is transferred to an extruder, and the mixture is heated to 180° C. to make the mixture molten, and the molten mixture is passed through a die, cooled and shaped, and cut into granules to obtain the chemical fiber masterbatch.

Water hyacinth is an aquatic plant that grows rapidly and has strong reproductive capacity. Therefore, cellulose resources are abundant and easy to obtain, which provides sufficient raw materials for the production of chemical fiber masterbatches and helps to reduce production costs; the water hyacinth fiber molecular chain contains multiple hydroxyl groups, and these hydroxyl groups can interact with other compounds containing polar groups to increase compatibility; the water hyacinth fiber has a large specific surface area and adsorption capacity, and it can effectively adsorb additives and form a stable mixture with them; the water hyacinth cellulose has high mechanical strength and stability, so that the prepared chemical fiber masterbatch has good physical properties, and these properties can ensure the stability and durability of the chemical fiber masterbatch during subsequent processing and use; therefore, the present invention selects water hyacinth fiber as the main formula.

As a new type of two-dimensional carbon material, Graphene has excellent thermal and chemical stability. It can significantly improve the heat resistance of the fiber, making the modified water hyacinth fiber difficult to melt or drip under high temperature environment, and can effectively prevent the spread of flames and the continuation of combustion; the introduction of ammonium hypophosphite provides flame retardant properties for water hyacinth fiber, which can decompose at high temperature to produce flame-retardant gas phosphine, dilute the oxygen concentration in the air, and thus inhibit the burning of flames. This feature can further enhance the anti-melting droplet ability of water hyacinth fiber; the addition of silica can improve the insulation and stability of water hyacinth fiber. Silica has good insulation properties and can effectively isolate current. At the same time, silica can also enhance the structural stability of the fiber and improve its anti-deformation ability under high temperature environment; melamine has excellent heat resistance and mechanical properties, and can enhance the tensile strength and wear resistance of the fiber. This makes the modified water hyacinth fiber not easy to break or deform when subjected to external force, and maintains stable anti-melting droplet performance. In the present invention, graphyne, ammonium hypophosphite, silicon dioxide and melamine are first mixed, and then the mixture is used to modify water hyacinth fiber, so that the modified water hyacinth fiber has better heat resistance, stability and anti-melting droplet performance.

Aromatic sulfone is a fiber material with excellent performance. It has good flame retardancy, heat resistance and chemical stability. The flame retardancy of aromatic sulfone comes from its chemical structure. Aromatic sulfone is an aromatic polyamide fiber containing sulfone groups on the main chain of the polymer. The strong electron-withdrawing sulfone group on the main chain of the macromolecule gives the aromatic sulfone fiber excellent heat resistance stability through the double bond conjugation of the benzene ring. It does not melt, shrink or shrink very little when burning, and extinguishes itself after leaving the flame, with very little smoldering or afterburning. In addition, aromatic sulfone also has excellent heat resistance and can maintain high strength at high temperatures. Therefore, the present invention further improves the anti-melting droplet performance of the prepared chemical fiber masterbatch by mixing the modified water hyacinth fiber and aromatic sulfone.

As an organic substance, calcium alginate has excellent biocompatibility, non-toxicity, biodegradability, high oxygen permeability and bactericidal and antibacterial properties; the addition of calcium alginate can improve the biocompatibility of anti-drip chemical fiber masterbatch, thereby improving the safety of the product; the carboxyl group in calcium alginate will release carbon dioxide and water when decomposed by heat, and the evaporation of water will take away part of the heat. At the same time, the generation of carbon dioxide and water vapor will also reduce the concentration of combustible gases, further playing a flame retardant role; when calcium alginate burns, calcium ions will be converted into calcium carbonate and calcium oxide, these substances act as a barrier during the combustion process, and at the same time, this conversion process will absorb heat, further improving the flame retardant efficiency. Therefore, the addition of calcium alginate in the present invention can also further improve the flame retardant properties of the prepared chemical fiber masterbatch.

Beneficial effects of the present invention:

In the present invention, water hyacinth fiber is modified by using a mixture of graphyne, ammonium hypophosphite, silicon dioxide and melamine, thereby improving the flame retardancy, stability and anti-melting dripping performance of the prepared chemical fiber masterbatch; in the preparation process of the present invention, the modified water hyacinth fiber and aromatic sulfone are mixed, and the strong electron-withdrawing sulfone group on the main chain of the aromatic sulfone macromolecule gives the aromatic sulfone fiber excellent heat resistance stability through the double bond conjugation of the benzene ring. It does not melt, does not shrink or shrinks very little during combustion, and self-extinguishes after leaving the flame. The mixture of the two further improves the anti-melting dripping performance of the prepared chemical fiber masterbatch; in the present invention, the flame retardancy of the anti-melting dripping chemical fiber masterbatch is further improved by adding calcium alginate, because when calcium alginate is burned, calcium ions will be converted into calcium carbonate and calcium oxide, and these substances play a barrier role in the combustion process. At the same time, this conversion process will absorb heat, further improving the flame retardant efficiency.

DETAILED DESCRIPTION

In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with the embodiments.

Formula ratio 1: 30 parts of modified water hyacinth fiber, 40 parts of aromatic sulfone fiber, 10 parts of calcium alginate, 10 parts of polytetrafluoroethylene, 5 parts of polyethylene glycol-10000, 2 parts of vinyl triethoxysilane, 2 parts of stearic acid, and 1 part of lubricating oil;

Formula ratio 2: 40 parts of modified water hyacinth fiber, 30 parts of aromatic sulfone fiber, 10 parts of calcium alginate, 10 parts of polytetrafluoroethylene, 5 parts of polyethylene glycol-10000, 2 parts of vinyl triethoxysilane, 2 parts of stearic acid, and 1 part of lubricating oil;

Formula ratio 3: 40 parts of modified water hyacinth fiber, 40 parts of aromatic sulfone fiber, 10 parts of calcium alginate, 5 parts of polytetrafluoroethylene, 1 part of polyethylene glycol-20000, 1 part of vinyl triethoxysilane, 1 part of stearic acid, and 2 parts of lubricating oil;

Formula ratio 4: 30 parts of modified water hyacinth fiber, 40 parts of aromatic sulfone fiber, 15 parts of calcium alginate, 10 parts of polytetrafluoroethylene, 2 parts of polyethylene glycol-20000, 1 part of vinyl triethoxysilane, 1 part of stearic acid, and 1 part of lubricating oil;

Formula ratio 5: 40 parts of modified water hyacinth fiber, 30 parts of aromatic sulfone fiber, 15 parts of calcium alginate, 10 parts of polytetrafluoroethylene, 2 parts of polyethylene glycol-20000, 1 part of vinyl triethoxysilane, 1 part of stearic acid, and 1 part of lubricating oil;

The preparation process of modified water hyacinth fiber is as follows:

S1: Wash the water hyacinth, dry it and grind it in a ball mill at a speed of 400 r/min for 4 h. Soak the ground powder in 100 °C water for 12 h to obtain a mixture A.

S2: After the mixture A is cooled to 50°C, it is placed in a homogenizer and homogenized at 10 MPa for 20 min, and then centrifuged at 12000 r/min to remove excess water, filter, and dry at 110°C for 12 h to obtain particle B;

S3: The particle B prepared in S2 is immersed in a mixed solution of toluene and anhydrous ethanol in a volume ratio of 1:3 at 50°C for 12 hours, filtered and washed to obtain particle C;

S4: adding particle C into a 30% sodium hydroxide solution, stirring at a speed of 300 r/min for 4 h, filtering and washing, and obtaining particle D;

S5: adding particle D to a mixed solution of sodium chlorite and glacial acetic acid in a volume ratio of 1:4, stirring at a speed of 300 r/min for 5 h, filtering and washing, and obtaining particle E;

S6: adding the particle E to a mixed solution of tetrabutylammonium hydroxide, urea and deionized water in a volume ratio of 5:3:12, stirring at a speed of 300 r/min for 2 hours, filtering, collecting the filtrate, centrifuging the filtrate at a speed of 12000 r/min using a centrifuge, filtering, and drying at 80°C for 12 hours to obtain water hyacinth fiber;

S7: Graphene, ammonium hypophosphite, silicon dioxide and melamine were mixed in a mass ratio of 1:2:2:1, mixed evenly, and then put into a ball mill and ground at a speed of 300 r/min for 1 h to obtain a mixture F;

S8: The water hyacinth fiber prepared in S6 and the mixture F prepared in S7 are mixed in a mass ratio of 8:1, put into a ball mill, and grind at a speed of 400 r/min under a nitrogen atmosphere for 2 hours to obtain the modified water hyacinth fiber. The particle size of the modified water hyacinth fiber is 200 mesh.

Example 1

A preparation process of a flame retardant and anti-melt droplet chemical fiber masterbatch, the specific process of the preparation process is as follows:

S81: According to the formula ratio 1, the modified water hyacinth fiber, aromatic sulfone fiber, and calcium alginate are placed in a ball mill and ground at a speed of 400 r/min for 1 h, and nitrogen gas with a flow rate of 10 m/s is introduced for purging for 2 h, and then polytetrafluoroethylene, polyethylene glycol-10000, vinyl triethoxysilane, stearic acid and lubricating oil are added and stirred at a stirring rate of 300 r/min to obtain a mixture;

S82: The mixture obtained in S81 is transferred to an extruder, and the mixture is heated to 180° C. to make the mixture molten, and the molten mixture is passed through a die, cooled and shaped, and cut into granules to obtain a product.

Example 2

A preparation process of a flame retardant and anti-melt droplet chemical fiber masterbatch, the specific process of the preparation process is as follows:

S81: According to the formula ratio 2, the modified water hyacinth fiber, aromatic sulfone fiber, and calcium alginate are placed in a ball mill and ground at a speed of 400 r/min for 1 h, and nitrogen gas with a flow rate of 10 m/s is introduced for purging for 2 h, and then polytetrafluoroethylene, polyethylene glycol-10000, vinyl triethoxysilane, stearic acid and lubricating oil are added and stirred at a stirring rate of 300 r/min to obtain a mixture;

S82: The mixture obtained in S81 is transferred to an extruder, and the mixture is heated to 180° C. to make the mixture molten, and the molten mixture is passed through a die, cooled and shaped, and cut into granules to obtain a product.

Example 3

A preparation process of a flame retardant and anti-melt droplet chemical fiber masterbatch, the specific process of the preparation process is as follows:

S81: According to the formula ratio 3, the modified water hyacinth fiber, aromatic sulfone fiber, and calcium alginate are placed in a ball mill and ground at a speed of 400 r/min for 1 h, and nitrogen gas with a flow rate of 10 m/s is introduced for purging for 2 h, and then polytetrafluoroethylene, polyethylene glycol-20000, vinyl triethoxysilane, stearic acid and lubricating oil are added and stirred at a stirring rate of 300 r/min to obtain a mixture;

S82: The mixture obtained in S81 is transferred to an extruder, and the mixture is heated to 180° C. to make the mixture molten, and the molten mixture is passed through a die, cooled and shaped, and cut into granules to obtain a product.

Example 4

A preparation process of a flame retardant and anti-melt droplet chemical fiber masterbatch, the specific process of the preparation process is as follows:

S81: According to the formula ratio 4, the modified water hyacinth fiber, aromatic sulfone fiber, and calcium alginate are placed in a ball mill and ground at a speed of 400 r/min for 1 h, and nitrogen gas with a flow rate of 10 m/s is introduced for purging for 2 h, and then polytetrafluoroethylene, polyethylene glycol-20000, vinyl triethoxysilane, stearic acid and lubricating oil are added and stirred at a stirring rate of 300 r/min to obtain a mixture;

S82: The mixture obtained in S81 is transferred to an extruder, and the mixture is heated to 180° C. to make the mixture molten, and the molten mixture is passed through a die, cooled and shaped, and cut into granules to obtain a product.

Example 5

A preparation process of a flame retardant and anti-melt droplet chemical fiber masterbatch, the specific process of the preparation process is as follows:

S81: According to the formula ratio of 5, the modified water hyacinth fiber, aromatic sulfone fiber, and calcium alginate are put into a ball mill and ground at a speed of 400 r/min for 1 hour, and nitrogen gas with a flow rate of 10 m/s is introduced for purging for 2 hours, and then polytetrafluoroethylene, polyethylene glycol-20000, vinyl triethoxysilane, stearic acid and lubricating oil are added and stirred at a stirring rate of 300 r/min to obtain a mixture;

S82: The mixture obtained in S81 is transferred to an extruder, and the mixture is heated to 180° C. to make the mixture molten, and the molten mixture is passed through a die, cooled and shaped, and cut into granules to obtain a product.

Comparative Example 1

In this comparative example, graphyne, ammonium hypophosphite, silicon dioxide and melamine are not used to modify the water hyacinth fiber, and the remaining steps are consistent with Example 3.

Comparative Example 2

In this comparative example, no aromatic sulfone was added, and all modified water hyacinth fibers were used. The remaining steps were consistent with those in Example 3.

Comparative Example 3

In this comparative example, calcium alginate was not added, and the remaining steps were consistent with those in Example 3.

Flame retardancy test: The masterbatch in the embodiment and the comparative example was pressed into a sample of 125x13x1.6 mm on an injection molding machine and tested according to GB∕T 2408-2021.

The experimental results of the embodiments and comparative examples are summarized in the following table:

Experiments show that modification of water hyacinth fiber with graphyne, ammonium hypophosphite, silica and melamine effectively improves the flame retardancy of the anti-drip chemical fiber masterbatch; the addition of aromatic sulfone further improves the anti-drip performance of the anti-drip chemical fiber masterbatch; the addition of calcium alginate further improves the flame retardancy of the anti-drip chemical fiber masterbatch.

When the present invention is used:

The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims (8)

1. The flame-retardant anti-dripping chemical fiber master batch is characterized in that the flame-retardant anti-dripping chemical fiber master batch comprises, by weight, 30-40 parts of modified water hyacinth fibers, 30-40 parts of polysulfonamide, 10-15 parts of calcium alginate, 5-10 parts of anti-dripping agents, 1-5 parts of dispersing agents, 1-2 parts of coupling agents, 1-2 parts of smoothing agents and 1-2 parts of lubricating oil,

Wherein, the preparation process of the modified water hyacinth fiber is as follows,

S1: firstly cleaning water hyacinth, drying, putting into a ball mill for grinding, wherein the grinding speed is 400r/min, the grinding time is 4h, and soaking the ground powder in water at 100 ℃ for 12h to obtain a mixed solution A;

S2: after the temperature of the mixed solution A is reduced to 50 ℃, homogenizing for 20min under 10MPa in a homogenizer, centrifugally separating at the rotating speed of 12000r/min by using a centrifugal machine, removing excessive water, filtering, and drying at 110 ℃ for 12h to obtain a particulate matter B;

S3: immersing the particles B prepared in the step S2 in a volume ratio of 1:3, soaking in a mixed solution of toluene and absolute ethyl alcohol at 50 ℃ for 12 hours, filtering and washing to obtain particles C;

s4: adding the particles C into 30% alkali liquor, stirring for 4 hours at the rotating speed of 300r/min, filtering and washing to obtain particles D;

S5: adding the particles D into a mixture with a volume ratio of 1:4, stirring for 5 hours at the rotating speed of 300r/min in the mixed solution of sodium chlorite and glacial acetic acid, filtering and washing to obtain particles E;

S6: adding the particles E into a mixture with a volume ratio of 5:3:12, stirring for 2 hours at a rotation speed of 300r/min, filtering, collecting filtrate, centrifugally separating the filtrate by using a centrifugal machine at a rotation speed of 12000r/min, filtering, and drying at 80 ℃ for 12 hours to obtain water hyacinth fibers;

S7: graphite alkyne, ammonium hypophosphite, silicon dioxide and melamine are mixed according to the mass ratio of 1:2:2:1, mixing, putting the mixture into a ball mill, and grinding the mixture for 1h at the rotating speed of 300r/min after the mixture is uniformly mixed to obtain a mixture F;

S8: mixing the water hyacinth fiber prepared in the step S6 and the mixture F prepared in the step S7 in a mass ratio of 8:1, mixing, putting into a ball mill, and grinding at a rotating speed of 400r/min under the nitrogen atmosphere for 2 hours to obtain the modified water hyacinth fiber.

2. The flame retardant anti-dripping chemical fiber master batch according to claim 1, wherein the anti-dripping agent is polytetrafluoroethylene.

3. The flame-retardant anti-dripping chemical fiber master batch according to claim 1, wherein the dispersing agent is polyethylene glycol and has a molecular weight of 10000-20000.

4. The flame-retardant anti-dripping chemical fiber master batch according to claim 1, wherein the coupling agent is one or more of vinyl triethoxysilane and vinyl trimethoxysilane.

5. The flame-retardant anti-dripping chemical fiber master batch according to claim 1, wherein the smoothing agent is one or more of stearic acid, polyethylene wax and polypropylene wax.

6. The flame-retardant anti-dripping chemical fiber master batch according to claim 1, wherein the alkali liquor in the S4 is one or more of sodium hydroxide and potassium hydroxide.

7. The flame-retardant anti-dripping chemical fiber master batch according to claim 1, wherein the particle size of the modified water hyacinth fiber obtained in the step S8 is 200 meshes.

8. A preparation process of flame-retardant anti-dripping chemical fiber master batch, which is realized based on the flame-retardant anti-dripping chemical fiber master batch according to any one of claims 1 to 7, and is characterized in that the specific flow of the preparation process is as follows,

S81: proportionally placing the modified water hyacinth fiber, polysulfonamide and calcium alginate into a ball mill, grinding for 1h at the rotating speed of 400r/min, introducing nitrogen with the flow speed of 10m/s, blowing for 2h, and then adding an anti-dripping agent, a dispersing agent, a coupling agent, a smoothing agent and lubricating oil, and continuously stirring at the stirring speed of 300r/min to obtain a mixture;

S82: transferring the mixture prepared in the step S81 into an extruder, heating the mixture to 180 ℃ to enable the mixture to be in a molten state, cooling and shaping the molten mixture through a die, and cutting the molten mixture into particles to obtain the chemical fiber master batch.