CN114016282A - Manufacturing method of flame-retardant antibacterial polyester-cotton blended fabric - Google Patents

Manufacturing method of flame-retardant antibacterial polyester-cotton blended fabric Download PDF

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CN114016282A
CN114016282A CN202111309330.5A CN202111309330A CN114016282A CN 114016282 A CN114016282 A CN 114016282A CN 202111309330 A CN202111309330 A CN 202111309330A CN 114016282 A CN114016282 A CN 114016282A
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flame
cotton
retardant
component
parts
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阳斌
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Shanghai Oubei Industrial Co ltd
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Shanghai Oubei Industrial Co ltd
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    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
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    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/07—Addition of substances to the spinning solution or to the melt for making fire- or flame-proof filaments
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    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
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    • D03D15/513—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads heat-resistant or fireproof
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Abstract

The invention belongs to the technical field of flame-retardant fabrics, and particularly relates to a manufacturing method of a flame-retardant antibacterial polyester-cotton blended fabric, which comprises the following raw materials: 45-50 parts of polyethylene terephthalate (PET), 60-65 parts of cotton fibers, 8-12 parts of caustic soda, 62-66 parts of dilute hydrochloric acid, 10-12 parts of a tetramethylolphosphonium chloride urea condensate aqueous solution and 8-10 parts of a plant source bacteriostatic agent; the concentration of the aqueous solution of the tetramethylolphosphonium chloride urea condensate is 400-500 g/L; according to the invention, the flame-retardant gel is added, the agar, the water, the aluminum sulfate and the sodium bicarbonate are matched to prepare the component A and the component B, the aluminum sulfate and the sodium bicarbonate in the component A and the component B can react after contacting with each other to generate a large amount of carbon dioxide gas, and after the temperature is increased, the large amount of carbon dioxide gas is generated and sprayed to a fire source.

Description

Manufacturing method of flame-retardant antibacterial polyester-cotton blended fabric
Technical Field
The invention belongs to the technical field of flame-retardant fabrics, and particularly relates to a manufacturing method of a flame-retardant antibacterial polyester-cotton blended fabric.
Background
In the prior art, when the polyester-cotton blended fabric is heated, the polyester component which is heated and melted can cover the surface of the polyester fiber, the polyester fiber and the carbon generated by cracking the polyester fiber form a framework to prevent the fabric from shrinking, so that the molten polyester becomes a fuel of an ignition area, the fabric burns more intensely, and a flame retardant can migrate between the polyester and the cotton during the combustion process, therefore, the flame retardant property of the polyester-cotton fabric is difficult, in the prior art, in order to improve the flame retardant property of the polyester-cotton blended fabric, the polyester fiber and the cotton fiber are modified by using the flame retardant, but because the polyester-cotton fabric ensures the comfort, the content of the cotton fibers is high, and the polyester fibers and the cotton fibers are mutually supported, so that flame in the ignited polyester-cotton fabric is easy to spread along the cotton fibers, and the ignition speed of the polyester-cotton fabric is high.
A method for manufacturing a flame-retardant antibacterial polyester-cotton blended fabric published by Chinese patent application No. comprises the following steps: CN2020106827155, using aqueous solution of tetra-hydroxymethyl phosphorus chloride urea condensate to perform secondary flame retardant treatment on the cotton-polyester blended fabric, and then using natural polymer shell polysaccharide antibacterial agent to treat the flame retardant cotton-polyester blended fabric to finally obtain the flame retardant antibacterial cotton-polyester blended fabric. The flame-retardant antibacterial polyester-cotton blended fabric prepared by the method has good flame-retardant, antibacterial, mildew-proof, deodorizing, moisture-absorbing and antistatic effects, has an inhibiting effect on various bacteria and fungi, and has a high-efficiency antibacterial effect.
In view of the above, the invention provides a method for manufacturing a flame-retardant antibacterial polyester-cotton blended fabric, which is used for solving the technical problems.
Disclosure of Invention
The invention provides a manufacturing method of a flame-retardant antibacterial polyester-cotton blended fabric, aiming at making up for the defects of the prior art and solving the problem that the flame retardant property of the fabric is poor when the polyester-cotton blended fabric is heated and combusted in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a manufacturing method of a flame-retardant antibacterial polyester-cotton blended fabric, which comprises the following raw materials:
45-50 parts of polyethylene terephthalate (PET), 60-65 parts of cotton fibers, 8-12 parts of caustic soda, 62-66 parts of dilute hydrochloric acid, 10-12 parts of a tetramethylolphosphonium chloride urea condensate aqueous solution and 8-10 parts of a plant source bacteriostatic agent;
the concentration of the dilute hydrochloric acid is 2.6-2.8%; the concentration of the aqueous solution of the tetramethylolphosphonium chloride urea condensate is 400-500 g/L;
the manufacturing method of the flame-retardant antibacterial polyester-cotton blended fabric comprises the following steps:
s1: introducing polyethylene glycol terephthalate into a stirring kettle, controlling the temperature in the stirring kettle to be 275-295 ℃, pouring the aqueous solution of the tetramethylolphosphonium chloride urea condensate into the stirring kettle after the temperature is raised, controlling the stirring speed of the stirring kettle to be 120-160 r/min, and keeping the temperature and heating for 25-30 min;
s2: after heat preservation and heating are finished, introducing caustic soda particles which are milled to be 0.08-0.1 mm in particle size into a stirring kettle, continuously stirring for 10-12min, introducing the mixture into a double-screw extruder, and controlling the extrusion temperature of the double-screw extruder to be 175-195 ℃;
s3: twisting cotton fibers to form 0.75-0.8 mm cotton threads, soaking half of the cotton threads in warm water with a temperature of 45-65 ℃ added with a plant source bacteriostatic agent for 2-3H, transferring the cotton threads into a cold storage, freezing the cotton threads at a temperature of-15 to-12 ℃ for 30-45 min, and extruding and coating the mixture in a double-screw extruder on the surfaces of the cotton threads after the freezing treatment is finished;
s4: controlling the thickness of the coating layer to be 0.25-0.3 mm, extruding and coating to obtain a double-layer silk thread, cooling the double-layer silk thread at normal temperature, immersing the double-layer silk thread in a dilute hydrochloric acid solution, controlling the immersion time to be 3-4H, overturning at an interval of 0.5H, preparing a flame-retardant silk thread after immersion is finished, and co-spinning the flame-retardant silk thread and the residual cotton threads to obtain the flame-retardant antibacterial polyester-cotton blended fabric;
in the prior art, when the polyester-cotton blended fabric is heated, the polyester component which is heated and melted can cover the surface of the polyester fiber, the polyester fiber and the carbon generated by cracking the polyester fiber form a framework to prevent the fabric from shrinking, so that the molten polyester becomes a fuel of an ignition area, the fabric burns more intensely, and a flame retardant can migrate between the polyester and the cotton during the combustion process, therefore, the flame retardant property of the polyester-cotton fabric is difficult, in the prior art, in order to improve the flame retardant property of the polyester-cotton blended fabric, the polyester fiber and the cotton fiber are modified by using the flame retardant, but because the polyester-cotton fabric ensures the comfort, the content of the cotton fibers is high, and the polyester fibers and the cotton fibers are mutually supported, so that flame in the ignited polyester-cotton fabric is easy to spread along the cotton fibers, and the ignition speed of the polyester-cotton fabric is high;
when the invention works, firstly, the aqueous solution of the condensation compound of the tetramethylol phosphorus chloride and the urea is added into the terylene base material, the flame retardance of the terylene is effectively improved, simultaneously, the modified terylene base material is coated on the surface of the cotton thread, the modified cotton thread and the rest cotton thread are blended and woven into the fabric, compared with the ratio of the terylene to the cotton thread in the polyester-cotton blended fabric in the prior art, the area occupied by the terylene in the fabric is effectively increased, simultaneously, after the moisture in the terylene base material added with the condensation compound of the tetramethylol phosphorus chloride and the urea is evaporated in the continuous heating process, the caustic soda powder is added, because the melting point temperature of the caustic soda solid is higher than the melting point of the terylene base material (polyethylene glycol terephthalate), the caustic soda powder is uniformly dispersed on the surface layer of the double-layer silk thread under the extrusion coating effect of a double screw extruder, and in the process of soaking in the dilute hydrochloric acid solution, the caustic soda is alkaline and reacts with the dilute hydrochloric acid to be dissolved, so that uniform micropores are formed on the surface of the double-layer silk thread, the conductivity of the prepared flame-retardant silk thread is better, the polyester is used for covering, the specific area of the polyester in the fabric is increased, and meanwhile, the micropores can also enable cotton threads inside the flame-retardant silk thread to be better conducted with the outside, so that the prepared fabric is better in air permeability and moisture absorption.
Preferably, the raw materials also comprise 15-18 parts of flame-retardant gel; the flame-retardant gel is formed by mixing the component A and the component B according to the proportion of 1: 6; the component A is prepared from agar, water and aluminum sulfate according to the proportion of 5:3: 1; the component B is prepared from agar, water, sodium bicarbonate and starch according to the proportion of 5:15:6: 3; the flame retardant gel is combined with cotton threads;
when the fabric is in work, the flame-retardant gel is added, the agar is matched with water to prepare the component A and the component B by the aluminum sulfate and the sodium bicarbonate, the agar is in a solid state at normal temperature and can be melted into a solid state when being heated to more than 95 ℃, the agar solution is used to prepare the aluminum sulfate and the sodium bicarbonate into the gel, the component A and the component B are both solid gels at normal temperature and can not react with each other, after the surface temperature of the fabric is increased, the moisture in the gel is gradually evaporated along with the increase of the temperature, the fabric is cooled, the flame-retardant gel is converted into a liquid state from the solid state along with the continuous increase of the temperature, the aluminum sulfate and the sodium bicarbonate in the component A and the component B can react after being contacted with each other to generate a large amount of carbon dioxide gas, after the temperature is increased, the generation of the large amount of the carbon dioxide gas is sprayed to a fire source, and the carbon dioxide has the flame-retardant effect, the flame-retardant fabric can effectively prevent open fire from being generated, and further improves the flame-retardant effect of the fabric.
Preferably, the preparation method of the flame-retardant gel comprises the following steps:
a1: mixing agar and water, heating to 98-102 ℃, preserving heat, stirring uniformly, naturally cooling to 55-60 ℃, mixing with aluminum sulfate, and mixing uniformly to obtain a component A;
a2: mixing sodium bicarbonate and starch, introducing into a refrigeration house, freezing for 0.5-1H at the low temperature of-30 to-25 ℃, crushing after freezing, mixing agar and water, heating to 98-102 ℃, preserving heat, stirring uniformly, naturally cooling to 65-70 ℃, and blending with crushed sodium bicarbonate powder to obtain a component B;
a3: respectively soaking the cotton threads in the S3 in the component A and the component B according to the ratio of 1:1, naturally cooling to normal temperature, removing redundant gel on the surface layer to obtain the cotton threads A and the cotton threads B, soaking the cotton threads B in warm water added with a plant-derived bacteriostatic agent, and directly blending the cotton threads A;
when in work, the component A and the component B are respectively solidified in the cotton thread to prepare the cotton thread A and the cotton thread B, the component A and the component B are effectively isolated, in the manufacturing process of the fabric, the component B can be temporarily dissolved at high temperature at the moment that the cotton thread B is extruded and coated on the surface of the terylene base material, but the cotton thread B is frozen at low temperature before being extruded and coated, can effectively reduce the dissolution of the component B, and can effectively reduce the difficulty of the component A and the component B in the preparation of the flame-retardant antibacterial polyester-cotton fabric due to the mutual isolation of the component A and the component B, meanwhile, in the preparation process of the component B, the viscosity and the filling property of the starch can be effectively utilized by mixing the sodium bicarbonate and the starch, so that the component B prepared from the sodium bicarbonate is effectively prevented from being decomposed under the short-time heating effect of extrusion coating, and the effect of flame-retardant gel is further reduced.
Preferably, the double-layer silk threads and the residual cotton threads are co-spun to obtain the fabric in S4, then the fabric is placed in a hot press, a single-side pressing plate of the hot press is controlled to be heated to 280-300 ℃, the hot pressing time is 0.5-0.8S, and dilute hydrochloric acid treatment is carried out after the hot pressing is finished;
when the double-layer silk thread fabric is in operation, the cotton thread B of the inner layer of the double-layer silk thread contains the component B in the flame-retardant gel, the double-layer silk thread is blended with the rest cotton thread A to prepare the fabric, then the fabric is placed in a hot press to be quickly hot-pressed, in the process of quick hot-pressing, under the action of high temperature, the polyethylene glycol terephthalate on one side of the fabric is dissolved, so that gaps between the flame-retardant silk thread and the cotton thread are further reduced, the conductivity of the one side of the fabric is reduced, the component A and the component B in the cotton thread A and the cotton thread B are partially dissolved under the action of high temperature, but at the moment, the polyethylene glycol terephthalate on the surface layer of the double-layer silk thread is softened and slightly dissolved, but still covers the surface of the cotton thread B, so that the cotton thread A and the cotton thread B are isolated, and dilute sulfuric acid washing is carried out after hot-pressing, so that the surface layer of the double-layer silk thread has micropores, and the component A and the component B are solidified, and then effectively avoiding the component A and the component B from reacting in advance to reduce the flame retardance of the finally prepared flame-retardant antibacterial polyester-cotton blended fabric, and simultaneously, the unilateral hot pressing enables the gaps on one side of the fabric to be small and the gaps on one side to be large, the blocking effect of the small side of the gap on the air to be strong, the fabric has strong flame retardance, the conduction area of the large side of the gap and the air is large, the fabric has strong hygroscopicity, and the performance of the fabric is further enhanced.
Preferably, the surface of the cotton thread frozen in the step S3 is coated with a layer of sodium chloride, potassium chloride and ammonium phosphate salt according to a ratio of 1: 1:1, mixing to obtain flame-retardant powder;
when the fabric is in operation, a layer of flame-retardant powder is adhered to the surface of the cotton thread B subjected to freezing treatment in S3, when the temperature of the fabric is raised, the flame-retardant gel begins to melt, the sodium bicarbonate in the component A is decomposed to generate carbon dioxide, the carbon dioxide carries the flame-retardant powder in the outward spraying process and is converged with the component B, and after the component A and the component B react, more carbon dioxide gas is generated, so that the spraying range of the flame-retardant powder is enlarged, the flame-retardant effect is effectively generated, and the flame-retardant performance of the prepared fabric is enhanced.
Preferably, 3-4 parts of gelatin are dissolved in warm water at 45-65 ℃ added with the plant-derived bacteriostatic agent in S3;
when the flame-retardant bacteriostatic polyester-cotton blended fabric works, a certain amount of gelatin is added into warm water at 45-65 ℃ added with a plant-source bacteriostatic agent, the gelatin is melted at the temperature of the warm water, the gelatin causes gelation of a solution in which the plant-source bacteriostatic agent is dissolved in the process of freezing after the cotton threads are soaked, and the gel formed by the gelatin is dissolved at a temperature of over 22 ℃, so that the volatilization rate of the plant-source bacteriostatic agent can be effectively controlled, and the bacteriostatic property of the prepared flame-retardant bacteriostatic polyester-cotton blended fabric is more durable.
The invention has the following beneficial effects:
1. according to the manufacturing method of the flame-retardant antibacterial polyester-cotton blended fabric, the flame-retardant gel is added, the agar and the water are matched with the aluminum sulfate and the sodium bicarbonate to prepare the component A and the component B, the aluminum sulfate and the sodium bicarbonate in the component A and the component B are contacted with each other and then react to generate a large amount of carbon dioxide gas, and after the temperature is increased, the large amount of carbon dioxide gas is generated and sprayed to a fire source.
2. The invention relates to a method for manufacturing a flame-retardant antibacterial polyester-cotton blended fabric, which comprises the steps of blending a double-layer silk thread with the rest cotton thread A to prepare the fabric, then placing the fabric in a hot press for quick hot pressing, dissolving polyethylene glycol terephthalate on one side of the fabric under the action of high temperature in the quick hot pressing process to further reduce gaps between the flame-retardant silk thread and the cotton thread and reduce the conductivity of the one side of the fabric, partially dissolving the component A and the component B in the cotton thread A and the cotton thread B under the action of high temperature, but because the polyethylene glycol terephthalate on the surface layer of the double-layer silk thread is softened and slightly dissolved and still covers the surface of the cotton thread B, the cotton thread A and the cotton thread B are isolated, and washing with dilute sulfuric acid is carried out after the hot pressing, the surface layer of the double-layer silk thread has micropores, and the component A and the component B are solidified, further effectively avoiding the component A and the component B from reacting in advance, so that the flame retardance of the finally prepared flame-retardant antibacterial polyester-cotton blended fabric is reduced.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a method flow chart of a manufacturing method of the flame-retardant antibacterial polyester-cotton blended fabric;
FIG. 2 is a process flow diagram of a method of making a flame retardant gel;
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 2, the method for manufacturing the flame-retardant antibacterial polyester-cotton blended fabric comprises the following raw materials:
45-50 parts of polyethylene terephthalate (PET), 60-65 parts of cotton fibers, 8-12 parts of caustic soda, 62-66 parts of dilute hydrochloric acid, 10-12 parts of a tetramethylolphosphonium chloride urea condensate aqueous solution and 8-10 parts of a plant source bacteriostatic agent;
the concentration of the dilute hydrochloric acid is 2.6-2.8%; the concentration of the aqueous solution of the tetramethylolphosphonium chloride urea condensate is 400-500 g/L;
the manufacturing method of the flame-retardant antibacterial polyester-cotton blended fabric comprises the following steps:
s1: introducing polyethylene glycol terephthalate into a stirring kettle, controlling the temperature in the stirring kettle to be 275-295 ℃, pouring the aqueous solution of the tetramethylolphosphonium chloride urea condensate into the stirring kettle after the temperature is raised, controlling the stirring speed of the stirring kettle to be 120-160 r/min, and keeping the temperature and heating for 25-30 min;
s2: after heat preservation and heating are finished, introducing caustic soda particles which are milled to be 0.08-0.1 mm in particle size into a stirring kettle, continuously stirring for 10-12min, introducing the mixture into a double-screw extruder, and controlling the extrusion temperature of the double-screw extruder to be 175-195 ℃;
s3: twisting cotton fibers to form 0.75-0.8 mm cotton threads, soaking half of the cotton threads in warm water with a temperature of 45-65 ℃ added with a plant source bacteriostatic agent for 2-3H, transferring the cotton threads into a cold storage, freezing the cotton threads at a temperature of-15 to-12 ℃ for 30-45 min, and extruding and coating the mixture in a double-screw extruder on the surfaces of the cotton threads after the freezing treatment is finished;
s4: controlling the thickness of the coating layer to be 0.25-0.3 mm, extruding and coating to obtain a double-layer silk thread, cooling the double-layer silk thread at normal temperature, immersing the double-layer silk thread in a dilute hydrochloric acid solution, controlling the immersion time to be 3-4H, overturning at an interval of 0.5H, preparing a flame-retardant silk thread after immersion is finished, and co-spinning the flame-retardant silk thread and the residual cotton threads to obtain the flame-retardant antibacterial polyester-cotton blended fabric;
in the prior art, when the polyester-cotton blended fabric is heated, the polyester component which is heated and melted can cover the surface of the polyester fiber, the polyester fiber and the carbon generated by cracking the polyester fiber form a framework to prevent the fabric from shrinking, so that the molten polyester becomes a fuel of an ignition area, the fabric burns more intensely, and a flame retardant can migrate between the polyester and the cotton during the combustion process, therefore, the flame retardant property of the polyester-cotton fabric is difficult, in the prior art, in order to improve the flame retardant property of the polyester-cotton blended fabric, the polyester fiber and the cotton fiber are modified by using the flame retardant, but because the polyester-cotton fabric ensures the comfort, the content of the cotton fibers is high, and the polyester fibers and the cotton fibers are mutually supported, so that flame in the ignited polyester-cotton fabric is easy to spread along the cotton fibers, and the ignition speed of the polyester-cotton fabric is high;
when the invention works, firstly, the aqueous solution of the condensation compound of the tetramethylol phosphorus chloride and the urea is added into the terylene base material, the flame retardance of the terylene is effectively improved, simultaneously, the modified terylene base material is coated on the surface of the cotton thread, the modified cotton thread and the rest cotton thread are blended and woven into the fabric, compared with the ratio of the terylene to the cotton thread in the polyester-cotton blended fabric in the prior art, the area occupied by the terylene in the fabric is effectively increased, simultaneously, after the moisture in the terylene base material added with the condensation compound of the tetramethylol phosphorus chloride and the urea is evaporated in the continuous heating process, the caustic soda powder is added, because the melting point temperature of the caustic soda solid is higher than the melting point of the terylene base material (polyethylene glycol terephthalate), the caustic soda powder is uniformly dispersed on the surface layer of the double-layer silk thread under the extrusion coating effect of a double screw extruder, and in the process of soaking in the dilute hydrochloric acid solution, the caustic soda is alkaline and reacts with the dilute hydrochloric acid to be dissolved, so that uniform micropores are formed on the surface of the double-layer silk thread, the conductivity of the prepared flame-retardant silk thread is better, the polyester is used for covering, the specific area of the polyester in the fabric is increased, and meanwhile, the micropores can also enable cotton threads inside the flame-retardant silk thread to be better conducted with the outside, so that the prepared fabric is better in air permeability and moisture absorption.
As an embodiment of the invention, the raw materials further comprise 15-18 parts of flame-retardant gel; the flame-retardant gel is formed by mixing the component A and the component B according to the proportion of 1: 6; the component A is prepared from agar, water and aluminum sulfate according to the proportion of 5:3: 1; the component B is prepared from agar, water, sodium bicarbonate and starch according to the proportion of 5:15:6: 3; the flame retardant gel is combined with cotton threads;
when the fabric is in work, the flame-retardant gel is added, the agar is matched with water to prepare the component A and the component B by the aluminum sulfate and the sodium bicarbonate, the agar is in a solid state at normal temperature and can be melted into a solid state when being heated to more than 95 ℃, the agar solution is used to prepare the aluminum sulfate and the sodium bicarbonate into the gel, the component A and the component B are both solid gels at normal temperature and can not react with each other, after the surface temperature of the fabric is increased, the moisture in the gel is gradually evaporated along with the increase of the temperature, the fabric is cooled, the flame-retardant gel is converted into a liquid state from the solid state along with the continuous increase of the temperature, the aluminum sulfate and the sodium bicarbonate in the component A and the component B can react after being contacted with each other to generate a large amount of carbon dioxide gas, after the temperature is increased, the generation of the large amount of the carbon dioxide gas is sprayed to a fire source, and the carbon dioxide has the flame-retardant effect, the flame-retardant fabric can effectively prevent open fire from being generated, and further improves the flame-retardant effect of the fabric.
As an embodiment of the present invention, the method for preparing the flame retardant gel comprises the steps of:
a1: mixing agar and water, heating to 98-102 ℃, preserving heat, stirring uniformly, naturally cooling to 55-60 ℃, mixing with aluminum sulfate, and mixing uniformly to obtain a component A;
a2: mixing sodium bicarbonate and starch, introducing into a refrigeration house, freezing for 0.5-1H at the low temperature of-30 to-25 ℃, crushing after freezing, mixing agar and water, heating to 98-102 ℃, preserving heat, stirring uniformly, naturally cooling to 65-70 ℃, and blending with crushed sodium bicarbonate powder to obtain a component B;
a3: respectively soaking the cotton threads in the S3 in the component A and the component B according to the ratio of 1:1, naturally cooling to normal temperature, removing redundant gel on the surface layer to obtain the cotton threads A and the cotton threads B, soaking the cotton threads B in warm water added with a plant-derived bacteriostatic agent, and directly blending the cotton threads A;
when in work, the component A and the component B are respectively solidified in the cotton thread to prepare the cotton thread A and the cotton thread B, the component A and the component B are effectively isolated, in the manufacturing process of the fabric, the component B can be temporarily dissolved at high temperature at the moment that the cotton thread B is extruded and coated on the surface of the terylene base material, but the cotton thread B is frozen at low temperature before being extruded and coated, can effectively reduce the dissolution of the component B, and can effectively reduce the difficulty of the component A and the component B in the preparation of the flame-retardant antibacterial polyester-cotton fabric due to the mutual isolation of the component A and the component B, meanwhile, in the preparation process of the component B, the viscosity and the filling property of the starch can be effectively utilized by mixing the sodium bicarbonate and the starch, so that the component B prepared from the sodium bicarbonate is effectively prevented from being decomposed under the short-time heating effect of extrusion coating, and the effect of flame-retardant gel is further reduced.
As an embodiment of the invention, the double-layer silk yarns in S4 are co-spun with the rest cotton yarns to obtain the fabric, then the fabric is placed in a hot press, the single-side press plate of the hot press is controlled to be heated to 280-300 ℃, the hot pressing time is 0.5-0.8S, and dilute hydrochloric acid treatment is performed after the hot pressing is finished;
when the double-layer silk thread fabric is in operation, the cotton thread B of the inner layer of the double-layer silk thread contains the component B in the flame-retardant gel, the double-layer silk thread is blended with the rest cotton thread A to prepare the fabric, then the fabric is placed in a hot press to be quickly hot-pressed, in the process of quick hot-pressing, under the action of high temperature, the polyethylene glycol terephthalate on one side of the fabric is dissolved, so that gaps between the flame-retardant silk thread and the cotton thread are further reduced, the conductivity of the one side of the fabric is reduced, the component A and the component B in the cotton thread A and the cotton thread B are partially dissolved under the action of high temperature, but at the moment, the polyethylene glycol terephthalate on the surface layer of the double-layer silk thread is softened and slightly dissolved, but still covers the surface of the cotton thread B, so that the cotton thread A and the cotton thread B are isolated, and dilute sulfuric acid washing is carried out after hot-pressing, so that the surface layer of the double-layer silk thread has micropores, and the component A and the component B are solidified, and then effectively avoiding the component A and the component B from reacting in advance to reduce the flame retardance of the finally prepared flame-retardant antibacterial polyester-cotton blended fabric, and simultaneously, the unilateral hot pressing enables the gaps on one side of the fabric to be small and the gaps on one side to be large, the blocking effect of the small side of the gap on the air to be strong, the fabric has strong flame retardance, the conduction area of the large side of the gap and the air is large, the fabric has strong hygroscopicity, and the performance of the fabric is further enhanced.
As an embodiment of the present invention, the surface of the cotton thread frozen in S3 is coated with a layer of sodium chloride, potassium chloride and ammonium phosphate before the cotton thread is hot-pressed and coated, according to a ratio of 1: 1:1, mixing to obtain flame-retardant powder;
when the fabric is in operation, a layer of flame-retardant powder is adhered to the surface of the cotton thread B subjected to freezing treatment in S3, when the temperature of the fabric is raised, the flame-retardant gel begins to melt, the sodium bicarbonate in the component A is decomposed to generate carbon dioxide, the carbon dioxide carries the flame-retardant powder in the outward spraying process and is converged with the component B, and after the component A and the component B react, more carbon dioxide gas is generated, so that the spraying range of the flame-retardant powder is enlarged, the flame-retardant effect is effectively generated, and the flame-retardant performance of the prepared fabric is enhanced.
In one embodiment of the present invention, 3 to 4 parts of gelatin are further dissolved in 45 to 65 ℃ warm water to which the plant-derived bacteriostatic agent is added in S3;
when the flame-retardant bacteriostatic polyester-cotton blended fabric works, a certain amount of gelatin is added into warm water at 45-65 ℃ added with a plant-source bacteriostatic agent, the gelatin is melted at the temperature of the warm water, the gelatin causes gelation of a solution in which the plant-source bacteriostatic agent is dissolved in the process of freezing after the cotton threads are soaked, and the gel formed by the gelatin is dissolved at a temperature of over 22 ℃, so that the volatilization rate of the plant-source bacteriostatic agent can be effectively controlled, and the bacteriostatic property of the prepared flame-retardant bacteriostatic polyester-cotton blended fabric is more durable.
The specific implementation flow is as follows:
when the fabric is in work, firstly, the aqueous solution of the condensation compound of the tetramethylol phosphorus chloride and the urea is added into the terylene base material, the flame retardance of terylene is effectively improved, meanwhile, the modified terylene base material is coated on the surface of cotton threads, the modified cotton threads and the rest cotton threads are blended and woven into the fabric, compared with the ratio of the terylene to the cotton threads in the polyester-cotton blended fabric in the prior art, the occupied area of the terylene in the fabric is effectively increased, simultaneously, after the moisture in the terylene base material added with the condensation compound of the tetramethylol phosphorus chloride and the urea is evaporated in the continuous heating process, the caustic soda powder is added, because the melting point temperature of the caustic soda solid is higher than the melting point of the terylene base material (polyethylene glycol terephthalate), the caustic soda powder is uniformly dispersed on the surface layer of the double-layer silk threads under the extrusion coating effect of a double-screw extruder, and in the process of soaking in the dilute hydrochloric acid solution, the caustic soda is in an alkaline state and reacts and dissolves with the dilute hydrochloric acid, and then make the surface of double-deck silk thread produce even micropore, and then make the fire-retardant silk thread of making per se conductivity better, not only use dacron to cover, improve dacron in the area of occupation of area in the surface fabric, the micropore can also make the inside cotton thread of fire-retardant silk thread and external better switch on simultaneously, and then make the surface fabric of making per se gas permeability and hygroscopicity better.
In order to verify the flame retardance of the flame-retardant antibacterial polyester-cotton blended fabric prepared by the invention, the following groups of experiments are specially set for verification;
example 1
The flame-retardant antibacterial polyester-cotton blended fabric comprises the following raw materials:
45 parts of polyethylene terephthalate (PET), 95 parts of cotton fiber, 10 parts of a tetramethylolphosphonium chloride urea condensate aqueous solution and 10 parts of a plant source bacteriostatic agent;
the concentration of the aqueous solution of the tetramethylolphosphonium chloride urea condensate is 400-500 g/L;
introducing polyethylene glycol terephthalate into a stirring kettle, controlling the temperature in the stirring kettle to be 275-295 ℃, pouring a tetramethylol phosphorus chloride urea condensation compound aqueous solution into the stirring kettle after the temperature is raised, controlling the stirring speed of the stirring kettle to be 120-160 r/min, keeping the temperature and heating for 25-30 min, placing the mixture into a spinning machine after the heating is finished, spinning the mixture into polyester silk threads, twisting the cotton fibers into cotton threads with the diameter of 0.75-0.8 mm, co-spinning the cotton threads and the polyester silk threads to obtain the flame-retardant antibacterial polyester-cotton blended fabric, and repeating the steps to obtain five flame-retardant antibacterial polyester-cotton blended fabrics with the labels of A1-A5;
fixing the first 1 to the second 5 by using fixing clamps respectively, placing alcohol lamps below the first 1 to the second 5 respectively, controlling the distance between the flame of the alcohol lamps and the fabric to be 3cm, 6cm, 9cm, 12cm and 15cm respectively, recording the generation time of open fire on the surfaces of the first 1 to the second 5 respectively, removing the alcohol lamps after the open fire is generated, measuring the burning area of the fabric after the flame on the surface of the fabric is automatically extinguished, and recording and outputting a table;
TABLE 1
Figure BDA0003341327420000091
Example 2
The flame-retardant antibacterial polyester-cotton blended fabric comprises the following raw materials:
45 parts of polyethylene terephthalate (PET), 65 parts of cotton fiber, 8 parts of caustic soda, 62 parts of dilute hydrochloric acid, 10 parts of a tetramethylolphosphonium chloride urea condensate aqueous solution and 8 parts of a plant source bacteriostatic agent;
the concentration of the dilute hydrochloric acid is 2.6 percent; the concentration of the aqueous solution of the tetramethylolphosphonium chloride urea condensate is 400 g/L;
introducing polyethylene glycol terephthalate into a stirring kettle, controlling the temperature in the stirring kettle to be 275-295 ℃, pouring an aqueous solution of a tetramethylolphosphonium chloride urea condensation compound into the stirring kettle after the temperature is raised, controlling the stirring speed of the stirring kettle to be 120-160 r/min, keeping the temperature and heating for 25-30 min, introducing caustic soda particles with the particle size of 0.08-0.1 mm into the stirring kettle after the temperature is kept and heating, continuously stirring for 10-12min, introducing the mixture into a double-screw extruder, controlling the extrusion temperature of the double-screw extruder to be 175-195 ℃, twisting cotton fibers into cotton threads with the particle size of 0.75-0.8 mm, soaking half of the cotton threads into warm water with the temperature of 45-65 ℃ added with a plant source bacteriostatic agent for 2-3H, transferring the cotton threads into a refrigeration house, carrying out refrigeration treatment at the temperature of-15-12 ℃ for 30-45 min, extruding the mixture in the double-screw extruder to coat the surfaces of the cotton threads after the refrigeration treatment is finished, controlling the thickness of the coating layer to be 0.25-0.3 mm, extruding and coating to obtain a double-layer silk thread, cooling the double-layer silk thread at normal temperature, immersing the double-layer silk thread in a dilute hydrochloric acid solution, controlling the immersion time to be 3-4H, overturning at an interval of 0.5H, preparing a flame-retardant silk thread after immersion is completed, co-spinning the flame-retardant silk thread and the residual cotton threads to obtain a flame-retardant antibacterial polyester-cotton blended fabric, and repeating the steps to obtain five flame-retardant antibacterial polyester-cotton blended fabrics with the labels of B1-B5 respectively;
respectively fixing the second 1 to the second 5 by using fixing clamps, respectively placing alcohol lamps below the second 1 to the second 5, controlling the distances between the flame of the alcohol lamps and the fabric to be 3cm, 6cm, 9cm, 12cm and 15cm, respectively recording the generation time of open fire on the surfaces of the second 1 to the second 5, removing the alcohol lamps after the open fire is generated, measuring the burning area of the fabric after the flame on the surface of the fabric is automatically extinguished, and recording and outputting a table;
TABLE 2
Figure BDA0003341327420000101
Example 3
The flame-retardant antibacterial polyester-cotton blended fabric comprises the following raw materials:
45 parts of polyethylene terephthalate (PET), 65 parts of cotton fiber, 8 parts of caustic soda, 62 parts of dilute hydrochloric acid, 10 parts of a tetramethylolphosphonium chloride urea condensate aqueous solution, 8 parts of a plant source bacteriostatic agent and 15 parts of a flame-retardant gel;
the concentration of the dilute hydrochloric acid is 2.6 percent; the concentration of the aqueous solution of the tetramethylolphosphonium chloride urea condensate is 400 g/L;
introducing polyethylene glycol terephthalate into a stirring kettle, controlling the temperature in the stirring kettle to be 275-295 ℃, pouring a tetramethylolphosphonium chloride urea condensate aqueous solution into the stirring kettle after the temperature is raised, controlling the stirring speed of the stirring kettle to be 120-160 r/min, keeping the temperature and heating for 25-30 min, introducing caustic soda particles with the particle size of 0.08-0.1 mm into the stirring kettle after the temperature is kept and heating, continuously stirring for 10-12min, introducing the mixture into a double-screw extruder, controlling the extrusion temperature of the double-screw extruder to be 175-195 ℃, twisting cotton fibers into 0.75-0.8 mm cotton threads, mixing agar and water, heating to 98-102 ℃, keeping the temperature and stirring uniformly, naturally cooling to 55-60 ℃, blending with aluminum sulfate, preparing a component A after uniform mixing, introducing sodium bicarbonate and starch into a refrigeration house after mixing, freezing for 0.5-1H at the low temperature of-30 to-25 ℃, after freezing, crushing, mixing agar and water, heating to 98-102 ℃, keeping the temperature, stirring uniformly, naturally cooling to 65-70 ℃ and blending with crushed sodium bicarbonate powder to obtain a component B, respectively soaking cotton threads into the component A and the component B according to the proportion of 1:1, naturally cooling to normal temperature, removing redundant gel on the surface layer to obtain the cotton threads A and the cotton threads B, soaking the cotton threads B into warm water with plant source bacteriostat and at the temperature of 45-65 ℃ for 2-3H, transferring the cotton threads B into a refrigerator, freezing for 30-45 min at the temperature of-15 to-12 ℃, extruding and coating the mixture in a double-screw extruder on the surface of the cotton threads after freezing, controlling the thickness of the coating layer to be 0.25-0.3 mm, preparing double-layer silk threads after extruding and coating, cooling at normal temperature, immersing the double-layer silk threads in dilute hydrochloric acid solution, controlling the immersion time to be 3-4H, overturning at an interval of 0.5H, preparing a flame-retardant silk thread after immersion, co-spinning the flame-retardant silk thread and the cotton thread A to obtain the flame-retardant antibacterial polyester-cotton blended fabric, and repeating the steps to obtain five pieces of flame-retardant antibacterial polyester-cotton blended fabric which are respectively marked as propane 1-propane 5;
respectively fixing the third to fourth fabrics 1 to 5 by using fixing clamps, respectively placing alcohol lamps below the third to fourth fabrics 1 to 5, controlling the distances between the flame of the alcohol lamps and the fabrics to be 3cm, 6cm, 9cm, 12cm and 15cm, respectively recording the generation time of open fire on the surfaces of the third to fourth fabrics 1 to 5, removing the alcohol lamps after the open fire is generated, measuring the burning area of the fabrics after the flame on the surfaces of the fabrics is automatically extinguished, and recording and outputting a table;
TABLE 3
Figure BDA0003341327420000111
According to the three groups of experimental data, under the same burning effect of the alcohol lamp, the comparison between the embodiment 1 and the embodiment 2 shows that the ignition difficulty and the flame retardant strength of the flame-retardant antibacterial polyester-cotton blended fabric prepared by using part of the formula of the flame-retardant antibacterial polyester-cotton blended fabric are improved compared with those of the prior art by coating and perforating the polyester fibers and the cotton fibers, and meanwhile, the comparison between the embodiment 2 and the embodiment 3 shows that the flame-retardant antibacterial polyester-cotton blended fabric prepared by completely using the formula and the method can quickly extinguish and retard fire due to the fact that the flame-retardant gel capable of reacting with each other is arranged in the flame-retardant antibacterial polyester-cotton blended fabric, and the flame-retardant antibacterial polyester-cotton blended fabric has a good flame retardant effect in the using process.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. A manufacturing method of a flame-retardant antibacterial polyester-cotton blended fabric is characterized by comprising the following steps: the flame-retardant antibacterial polyester-cotton blended fabric comprises the following raw materials:
45-50 parts of polyethylene terephthalate (PET), 60-65 parts of cotton fibers, 8-12 parts of caustic soda, 62-66 parts of dilute hydrochloric acid, 10-12 parts of a tetramethylolphosphonium chloride urea condensate aqueous solution and 8-10 parts of a plant source bacteriostatic agent;
the concentration of the dilute hydrochloric acid is 2.6-2.8%; the concentration of the aqueous solution of the tetramethylolphosphonium chloride urea condensate is 400-500 g/L;
the manufacturing method of the flame-retardant antibacterial polyester-cotton blended fabric comprises the following steps:
s1: introducing polyethylene glycol terephthalate into a stirring kettle, controlling the temperature in the stirring kettle to be 275-295 ℃, pouring the aqueous solution of the tetramethylolphosphonium chloride urea condensate into the stirring kettle after the temperature is raised, controlling the stirring speed of the stirring kettle to be 120-160 r/min, and keeping the temperature and heating for 25-30 min;
s2: after heat preservation and heating are finished, introducing caustic soda particles which are milled to be 0.08-0.1 mm in particle size into a stirring kettle, continuously stirring for 10-12min, introducing the mixture into a double-screw extruder, and controlling the extrusion temperature of the double-screw extruder to be 175-195 ℃;
s3: twisting cotton fibers to form 0.75-0.8 mm cotton threads, soaking half of the cotton threads in warm water with a temperature of 45-65 ℃ added with a plant source bacteriostatic agent for 2-3H, transferring the cotton threads into a cold storage, freezing the cotton threads at a temperature of-15 to-12 ℃ for 30-45 min, and extruding and coating the mixture in a double-screw extruder on the surfaces of the cotton threads after the freezing treatment is finished;
s4: controlling the thickness of the coating layer to be 0.25-0.3 mm, extruding and coating to obtain a double-layer silk thread, cooling at normal temperature, immersing the double-layer silk thread in a dilute hydrochloric acid solution, controlling the immersion time to be 3-4H, overturning at an interval of 0.5H, preparing a flame-retardant silk thread after immersion is finished, and co-spinning the flame-retardant silk thread and the residual cotton threads to obtain the flame-retardant antibacterial polyester-cotton blended fabric.
2. The manufacturing method of the flame-retardant antibacterial polyester-cotton blended fabric according to claim 1, characterized by comprising the following steps: the raw materials also comprise 15-18 parts of flame-retardant gel; the flame-retardant gel is formed by mixing the component A and the component B according to the proportion of 1: 6; the component A is prepared from agar, water and aluminum sulfate according to the proportion of 5:3: 1; the component B is prepared from agar, water, sodium bicarbonate and starch according to the proportion of 5:15:6: 3; the flame retardant gel is combined with cotton.
3. The manufacturing method of the flame-retardant antibacterial polyester-cotton blended fabric according to claim 2, characterized by comprising the following steps: the preparation method of the flame-retardant gel comprises the following steps:
a1: mixing agar and water, heating to 98-102 ℃, preserving heat, stirring uniformly, naturally cooling to 55-60 ℃, mixing with aluminum sulfate, and mixing uniformly to obtain a component A;
a2: mixing sodium bicarbonate and starch, introducing into a refrigeration house, freezing for 0.5-1H at the low temperature of-30 to-25 ℃, crushing after freezing, mixing agar and water, heating to 98-102 ℃, preserving heat, stirring uniformly, naturally cooling to 65-70 ℃, and blending with crushed sodium bicarbonate powder to obtain a component B;
a3: respectively soaking the cotton threads in the S3 in the component A and the component B according to the ratio of 1:1, naturally cooling to normal temperature, removing redundant gel on the surface layer to obtain the cotton threads A and the cotton threads B, soaking the cotton threads B in warm water added with the plant-derived bacteriostatic agent, and directly blending the cotton threads A.
4. The manufacturing method of the flame-retardant antibacterial polyester-cotton blended fabric according to claim 3, characterized by comprising the following steps: and in the S4, co-spinning the double-layer silk yarns and the residual cotton yarns to obtain the fabric, then placing the fabric in a hot press, controlling a single-side press plate of the hot press to heat to 280-300 ℃, carrying out hot pressing for 0.5-0.8S, and carrying out dilute hydrochloric acid treatment after the hot pressing is finished.
5. The manufacturing method of the flame-retardant antibacterial polyester-cotton blended fabric according to claim 3, characterized by comprising the following steps: wherein the surface of the cotton thread subjected to the freezing treatment in the S3 is adhered with a layer of sodium chloride, potassium chloride and ammonium phosphate before hot-pressing and coating, and the weight ratio of the cotton thread to the sodium chloride to the potassium chloride to the ammonium phosphate is 1: 1:1, and mixing to obtain the flame-retardant powder.
6. The manufacturing method of the flame-retardant antibacterial polyester-cotton blended fabric according to claim 5, characterized by comprising the following steps: wherein 3-4 parts of gelatin is dissolved in warm water at 45-65 ℃ added with the plant-derived bacteriostatic agent in S3.
CN202111309330.5A 2021-11-06 2021-11-06 Manufacturing method of flame-retardant antibacterial polyester-cotton blended fabric Pending CN114016282A (en)

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