Welding protective gloves and manufacturing method thereof

Abstract

The present invention discloses a kind of welding protective glove and its method, which includes the following: Step 1, selecting raw materials; Step 2, preparing refined terephthalic acid / graphene oxide / ethylene glycol modified slurry; Step 3 is esterification reaction; Step 4 is condensation reaction; Step 5, drying the obtained modified graphene flame retardant polyester mother granules, then heating and melting, and spinning bundle after filtering in a spinning box; Step 6, through a shuttle process, making a graphene flame retardant polyester filament woven shuttle fabric; Step 7, stirring and heating the controlled flame retardant rectifying liquid, immersing the fabric in the rectifying liquid, then extruding through a dip roller to remove excess rectifying liquid, and then drying on a drying table; Step 8, cutting and sewing the obtained fabric according to the glove template. The present invention also provides a welding protective glove made by this method. The manufacturing method of the gloves provided by the present invention is simple, suitable for welding, etc., and can safely protect the human body.

Description

[Technical field]

[0001] The present invention relates to a functional glove and a manufacturing method thereof, and more particularly to a protective glove for welding and a manufacturing method thereof. [Background technology]

[0002] Hands are the most complex organs of the human body and are used for a variety of tasks. Gloves are used as hand warmers and occupational protection equipment, but some are also decorative. They are essential for keeping warm in cold weather, and are also indispensable for medical and industrial use. Gloves can be categorized into sewn, knitted, glued, etc., depending on how they are made. As various functionalities are now required, technology related to glove materials and manufacturing processes has also evolved. In particular, the material of the glove determines the protective performance of the glove and is the basis for selecting gloves.

[0003] Graphene is a two-dimensional material in which carbon atoms are arranged in a hexagonal shape, and graphene oxide has functionalized surfaces with carboxyl, epoxy, hydroxyl, etc. The manufacturing process of graphene oxide is relatively simple, the raw material costs are low, and in fact, graphene oxide is more difficult to accumulate than graphene, so it can be widely used in large-scale industrial production.

[0004] Graphene is also a two-dimensional carbon material with excellent barrier performance, and its introduction into polymer materials can suppress the heat release of combustible gases during combustion. Graphene and flame retardants form a double barrier effect, greatly reducing the release rate of resin decomposition volatiles, and minimizing and transferring the released combustion heat.

[0005] It has also been reported in the literature that when the graphene layer chars, a continuous coal layer is formed, and this coal layer is dense and continuous, blocking the surface and preventing oxygen from penetrating deep into the material. Graphene has very good thermal conductivity, which means that localized heat is transferred to the remaining material and dispersed, making it difficult for fire to spread. Thermal conductivity and coke blockage generate the so-called labyrinth effect, where heat and combustion gases have to follow a tortuous path to the fuel, which effectively prevents the spread of flames. In addition to being flame retardant, graphene and graphene oxide also have a very high surface area, which adsorbs flammable organic volatiles and prevents their release and diffusion during combustion. Graphene can reduce toxic gases in fires.

[0006] Polyester fiber is a low-cost, highly functional chemical fiber used for a wide range of applications, but traditional polyester fibers lacked functionality. With the development of society, traditional Tetoron could no longer meet the needs for functional textiles. For example, gloves made with Tetoron are not suitable for environments such as electric welding, and cannot provide sufficient protection to workers. Summary of the Invention [Problem to be solved by the invention]

[0007] The object of the present invention is to provide a functional glove that is simple, suitable for applications such as welding, and capable of safely protecting the human body, and a manufacturing method thereof.

[0008] For this purpose, the method provided in the present invention for the welding protective gloves includes the above-mentioned method, in which: Step 1, raw material is selected; Step 2, refined terephthalic acid / graphene oxide / ethylene glycol modified slurry is prepared; Step 3, esterification reaction: the slurry obtained in step 2 is added to the reaction vessel, nitrogen is repeatedly charged, the air in the vessel is discharged, and finally nitrogen is charged and the temperature is raised to carry out the pressurized esterification reaction. Step 4, consolidation reaction: continue to increase the temperature in the kettle, carry out low vacuum consolidation, reduce the internal pressure of the kettle, increase the temperature, and leave it to stand after the reaction, open the casting head again, fill with nitrogen gas, form a stable flow in the polymer melt, cool in the water tank, cut the pellets in the cutting machine and dry them with drum air, and store them in reserve; Step 5, melt spinning: dry the modified graphene flame retardant polyester mother granules obtained in step 4, then heat melt, filter the spinning box and bundle the yarn; Step 6, prepare the fabric: shuttle weaving, make the graphene flame retardant polyester filament woven shuttle fabric obtained in step 5; Step 7, do post-treatment on the fabric: stir and heat the flame retardant treatment liquid, immerse the fabric in the treatment liquid, then pass through the pressure roller, extrude to remove excess treatment liquid, and then dry in the dryer to obtain a highly flame retardant fabric; Step 8, according to the glove template, cut and sew the fabric obtained in step 7 to make welding protective gloves.

[0009] In the manufacturing method of the above welding gloves, the raw materials in the above step 1 contain, by mass, 58% to 85% terephthalic acid, 10% to 40% ethylene glycol, 0.1% to 10% graphene oxide, 0.1% to 10% flame retardant, and 0.1% to 1% modifier.

[0010] Graphene oxide is produced by mechanical exfoliation, chemical vapor deposition, or oxidation-reduction, and the above welding glove is produced by the above method. Flame retardant is diammonium hydrogen phosphate, antimony titanium complex, antimony trioxide in a mass ratio of 1: (1-2): (2-3) and uniformly mixed; modifier is polyvinyl alcohol, polyethylene glycol, silane conjugate in a mass ratio of 1: (2-3): (3-4) and uniformly mixed.

[0011] The manufacturing method of the above welding protective gloves is as follows: in step 2 above, ethylene glycol is slowly added to the graphene oxide and flame retardant, and the modifier and terephthalic acid are added to the slurry, and after uniform stirring, the temperature is raised to 70-85°C and processed for 30-50min to obtain a modified dispersion solution. The molar ratio of terephthalic acid to ethylene glycol is 1:1-4.

[0012] In the manufacturing method of the above welding gloves, in the above step 3, the obtained slurry is added to the polymerization reaction vessel, nitrogen filling is repeated several times, the air in the vessel is discharged, and nitrogen filling is performed to set the vessel internal pressure to 0.1 to 0.5 MPa, and the temperature is gradually increased, and the vessel is pressurized at a temperature in the range of 230 to 260°C to carry out the pressurized methylation reaction.

[0013] In the above-mentioned manufacturing method of the welding protective gloves, in step 4, the temperature inside the vessel is raised to 225-265℃, low vacuum consolidation is performed, and the pressure inside the vessel is gradually lowered from normal pressure to 100-500 Pa while gradually raising the temperature to 270-290℃, and the reaction time is controlled to 60-90 minutes. After that, the head is opened after 15-30 minutes.

[0014] In the above welding glove manufacturing method, in step 5 above, the modified graphene flame retardant tetron base granules are dried, the drying temperature is controlled at 80-200℃, and the moisture content of the base granules after drying is controlled below 100 ppm. Then the mixture is put into the screw extrusion table to be heated and melted, and then filtered through the spinning box and bundled into yarn, the yarn temperature is 270-290℃, and the yarn speed is 500-1500 m / min; modified graphene cut-resistant polyester fiber is obtained.

[0015] In the above method for manufacturing welding protective gloves, the gram of the fabric obtained in step 6 is 100 to 500 grams / m 2 It is.

[0016] In the above manufacturing method of welding protective gloves, in step 7, the flame retardant liquid is prepared by selecting the same flame retardant components separately, dispersing them evenly in distilled water, stirring thoroughly, and heating to 50-80℃. The mass concentration of the flame retardant in the liquid is 10-30%. The fabric is soaked in the liquid and thoroughly soaked, then passed through a butter roll to squeeze out the excess liquid, and dried in a dryer. The drying temperature is 50-85℃. Effect of the Invention

[0017] The present invention also provides a protective glove for welding made by the above-described method.

[0018] The welding protective glove and the manufacturing method thereof provided by the present invention have the following advantages:

[0019] The welding protective gloves made by this invention use flame-retardant graphene tetron and have excellent flame retardancy, but the flame retardancy is even better when flame retardants are used. The gloves obtained have a high limiting oxygen index and have excellent protection against high temperatures, metal spatters and droplets generated during welding, so they can be further applied in fields such as welding to effectively protect the safety of the human body.

[0020] The welding protective gloves made by this method are suitable for large-scale industrial production because the process is simple, easy to operate, low cost, and economical. The specific implementation method Specific embodiments of the present invention will be described in further detail below. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The method for preparing a protective glove for welding provided by the present invention includes: selecting raw materials in step 1; and selecting a protective glove for welding in step 2. Step 2, prepare a refined terephthalic acid / graphene oxide / ethylene glycol modified slurry. Step 3, esterification reaction: add the slurry obtained in step 2 to the reaction vessel, repeatedly fill with nitrogen, evacuate the air in the vessel, and finally fill with nitrogen and heat the vessel to carry out the pressurized esterification reaction. Step 4, consolidation reaction: continue to increase the temperature in the kettle, carry out low vacuum consolidation, reduce the internal pressure of the kettle, increase the temperature, and leave it to stand after the reaction, open the casting head again, fill with nitrogen gas, form a stable flow in the polymer melt, cool in the water tank, cut into pieces by the granulator and dry with the drum, and store in reserve; Step 5, melt spinning: dry the modified graphene flame retardant polyester mother granules obtained in step 4, then heat melt, filter the spinning box and bundle the yarn; Step 6, fabric preparation: through the shuttle process, produce the long yarn woven fabric of graphene flame retardant polyester in step 5; Step 7, perform post-treatment on the fabric: stir and heat the flame retardant stabilizing liquid, immerse the fabric in the stabilizing liquid, then pass through the immersion roller, extrude to remove excess stabilizing liquid, and then dry in the dryer to obtain a highly flame retardant fabric; Step 8, according to the glove template, cut and sew the fabric obtained in step 7 to make welding protective gloves.

[0022] Preferably, the raw materials in step 1 are, by mass, 58%-85% purified terephthalic acid (PTA), 10%-40% ethylene glycol (EG), 0.1%-10% graphene oxide (GO), 0.1%-10% flame retardant, and 0.1%-1% modifier.

[0023] Graphene oxide can be produced by mechanical exfoliation, chemical vapor deposition, or oxidation-reduction.The flame retardant is made by uniformly mixing diammonium hydrogen phosphate, antimony titanium complex, and antimony trioxide in a mass ratio of 1:(1-2):(2-3); the modifier is made by uniformly mixing polyvinyl alcohol, polyethylene glycol, and silane coupling agent in a mass ratio of 1:(2-3):(3-4).

[0024] In step 2, ethylene glycol is slowly added to the graphene oxide and flame retardant, and at the same time, the modifier and terephthalic acid are added to the slurry. After uniform stirring, the temperature is increased to 70-85°C and treated for 30-50min to obtain a modified dispersion solution; the molar ratio of terephthalic acid to ethylene glycol is 1:1-4.

[0025] In step 3, the resulting slurry is added to a polymerization reactor, and the reactor is filled with nitrogen several times to remove the air from inside. The reactor is then filled with nitrogen again until the internal pressure reaches 0.1 to 0.5 MPa. The temperature is then gradually increased to perform pressurized esterification at a temperature in the range of 230 to 260°C.

[0026] In step 4, the temperature inside the pot is raised to 225-265°C for low vacuum consolidation, the pressure inside the pot is slowly lowered from normal pressure to 100-500 Pa, and the temperature is slowly raised to 270-290°C. The reaction time is controlled to 60-90 min, and the pot is left to stand for 15-30 min before the casting head is opened.

[0027] In step 5, the obtained modified graphene flame retardant tetron mother granules are dried, the drying temperature is controlled within the range of 80-200 ℃, and the moisture content of the mother granules after drying is less than 100 ppm; then the mixture is heated and melted in the screw extrusion table, and then filtered through the spinning box and bundled into yarn, the yarn temperature is 270-290 ℃, and the yarn speed is 500-1500 m / min; the modified graphene cut-resistant polyester fiber is obtained.

[0028] The gram of the fabric obtained in step 6 is 100 to 500 grams / m 2is.

[0029] In step 7, the flame retardant control solution is made by selecting the same flame retardant components and dispersing them evenly in distilled water, then thoroughly stirring and heating to 50-80℃, the mass concentration of the flame retardant in the solution is 10-30%; the fabric is soaked in the solution and thoroughly soaked, then passed through a butter roll to squeeze out the excess solution, and then dried in a dryer. The drying temperature is 50-85℃.

[0030] The equipment and other process parameters used in the present invention are well known to those skilled in the art.

[0031] The present invention also provides a protective welding glove made by this method. The welding protective glove and the manufacturing method thereof provided by the present invention will be further described below in relation to the embodiments.

[0032] (Example 1) A method for preparing protective gloves for welding, including: Step 1: Choose your ingredients. The preferred raw materials by weight percentage include 85% PTA, 10% ethylene glycol, 0.1% graphene oxide, 4.8% flame retardant, and 0.1% modifier. Graphene oxide is exfoliated using a mechanical method. The flame retardant is a homogeneous mixture of ammonium hydrogen phosphate, antimony titanium complex, and antimony trioxide in a mass ratio of 1:1:2. The modifier is obtained by uniformly mixing polyvinyl alcohol, polyethylene glycol, and silane coupling agent in a mass ratio of 1:2:3. Step 2, prepare modified PTA / GO / EG slurry. Slowly add ethylene glycol to the graphene oxide and flame retardant, and at the same time add the modifier and PTA material to the slurry. After stirring evenly, increase the temperature to 70~85℃ and process for 30~50min to obtain the modified PTA / GO / EG dispersion; the molar ratio of PTA material to EG is 1:1~4. Step 3 Esterification reaction: The slurry obtained in step 2 is added to the polymerization reactor, and the reactor is filled with nitrogen several times to remove the air from inside. The reactor is then filled with nitrogen again until the internal pressure is 0.1 to 0.5 MPa. The temperature is gradually increased and the esterification reaction is carried out under pressure in the range of 230 to 260°C. Step 4 Condensation reaction: Raise the temperature in the vessel to 225 ~ 265 ° C, carry out low vacuum condensation, slowly reduce the pressure in the vessel from normal pressure to 100 ~ 500 Pa, slowly raise it to 270 ~ 290 ° C, control the reaction time to 60 ~ 90 min, then leave it for 15 ~ 30 min, open the die cast, fill with nitrogen to form a stable flow in the polymer melt, cool in the sink, cut with a granulator, dry with drum wind, and store. Step 5, melt spinning: the modified graphene flame retardant tetron mother granules obtained in step 4 are dried, the drying temperature is controlled within the range of 80-200 ℃, and the moisture content of the mother granules after drying is less than 100 ppm; then the mixture is heated and melted in the screw extrusion table, and then filtered through the spinning box and bundled into yarn, the yarn temperature is 270-290 ℃, and the yarn speed is 500-1500 m / min; the modified graphene cut-resistant polyester fiber is obtained. Step 6, prepare fabric: The graphene flame retardant polyester obtained in step 5 is spun into long yarns and spun into fabric. The gram weight of the resulting fabric is 100-500g / m 2 is. Step 7: The fabric is post-treated: the flame retardant liquid is separated from the flame retardant liquid by selecting the same flame retardant components and dispersing them evenly in distilled water, then thoroughly stirring and heating to 50-80℃, so that the mass concentration of the flame retardant in the liquid is 10-30%; the fabric is immersed in the liquid and after it is thoroughly soaked, it is pressed through a butter roll to remove excess liquid, and then dried on a drying rack. The drying temperature is 50-85℃, and a highly flame retardant fabric is obtained. Step 8: According to the glove template, the fabric obtained in step 7 is cut and sewn to make welding protective gloves. This embodiment also provides a protective welding glove made by this method.

[0033] (Example 2) A method for preparing protective gloves for welding, including: Step 1: Choose your ingredients. The preferred raw materials by weight percentage include 58.4% PTA, 40% ethylene glycol, 1% graphene oxide, 0.1% flame retardant, and 0.5% modifier. Graphene oxide is made by chemical vapor deposition. The flame retardant is a homogeneous mixture of ammonium hydrogen phosphate, antimony titanium complex, and antimony trioxide in a mass ratio of 1:2:2. The modifier is obtained by uniformly mixing polyvinyl alcohol, polyethylene glycol, and silane coupling agent in a mass ratio of 1:2:4. Step 2, prepare modified PTA / GO / EG slurry. Slowly add ethylene glycol to the graphene oxide and flame retardant, and at the same time add the modifier and PTA material to the slurry. After stirring evenly, increase the temperature to 70~85℃ and process for 30~50min to obtain the modified PTA / GO / EG dispersion; the molar ratio of PTA material to EG is 1:1~4. Step 3 Esterification reaction: The slurry obtained in step 2 is added to the polymerization reactor, and the reactor is filled with nitrogen several times to remove the air from inside. The reactor is then filled with nitrogen again until the internal pressure is 0.1 to 0.5 MPa. The temperature is gradually increased and the esterification reaction is carried out under pressure in the range of 230 to 260°C. Step 4 Condensation reaction: Raise the temperature in the vessel to 225 ~ 265 ° C, carry out low vacuum condensation, slowly reduce the pressure in the vessel from normal pressure to 100 ~ 500 Pa, slowly raise it to 270 ~ 290 ° C, control the reaction time to 60 ~ 90 min, then leave it for 15 ~ 30 min, open the die cast, fill with nitrogen to form a stable flow in the polymer melt, cool in the sink, cut with a granulator, dry with drum wind, and store. Step 5, melt spinning: the modified graphene flame retardant tetron mother granules obtained in step 4 are dried, the drying temperature is controlled within the range of 80-200 ℃, and the moisture content of the mother granules after drying is less than 100 ppm; then the mixture is heated and melted in the screw extrusion table, and then filtered through the spinning box and bundled into yarn, the yarn temperature is 270-290 ℃, and the yarn speed is 500-1500 m / min; the modified graphene cut-resistant polyester fiber is obtained. Step 6, prepare fabric: The graphene flame retardant polyester obtained in step 5 is spun into long yarns and spun into fabric. The gram weight of the resulting fabric is 100-500g / m 2 is. Step 7: The fabric is post-treated: the flame retardant liquid is separated from the flame retardant liquid by selecting the same flame retardant components and dispersing them evenly in distilled water, then thoroughly stirring and heating to 50-80℃, so that the mass concentration of the flame retardant in the liquid is 10-30%; the fabric is immersed in the liquid and after it is thoroughly soaked, it is pressed through a butter roll to remove excess liquid, and then dried on a drying rack. The drying temperature is 50-85℃, and a highly flame retardant fabric is obtained. Step 8: According to the glove template, the fabric obtained in step 7 is cut and sewn to make welding protective gloves. This embodiment also provides a protective glove for welding made by this method.

[0034] (Example 3) A method for preparing protective gloves for welding, including: Step 1: Choose your ingredients. The preferred raw materials, by weight percentage, contain 64.8% PTA, 25% ethylene glycol, 5% graphene oxide, 5% flame retardant, and 0.2% modifier. Graphene oxide is made through a redox process. The flame retardant is a homogeneous mixture of ammonium hydrogen phosphate, antimony titanium complex, and antimony trioxide in a mass ratio of 1:1:3. The modifier is obtained by uniformly mixing polyvinyl alcohol, polyethylene glycol, and silane coupling agent in a mass ratio of 1:3:3. Step 2, prepare modified PTA / GO / EG slurry. Slowly add ethylene glycol to the graphene oxide and flame retardant, and at the same time add the modifier and PTA material to the slurry. After uniform stirring, increase the temperature to 70~85℃ and process for 30~50min to obtain the modified PTA / GO / EG dispersion; the molar ratio of PTA material to EG is 1:1~4. Step 3 Esterification reaction: The slurry obtained in step 2 is added to the polymerization reactor, and the reactor is filled with nitrogen several times to remove the air from inside. The reactor is then filled with nitrogen again until the internal pressure is 0.1 to 0.5 MPa. The temperature is gradually increased and the esterification reaction is carried out under pressure in the range of 230 to 260°C. Step 4 Condensation reaction: The temperature inside the vessel is raised to 225 ~ 265 ° C, low vacuum condensation is carried out, the pressure inside the vessel is slowly lowered from normal pressure to 100 ~ 500 Pa, and then slowly raised to 270 ~ 290 ° C, the reaction time is controlled at 60 ~ 90 min, and then it is left to stand for 15 ~ 30 min, and the die casting is opened and nitrogen is filled to form a stable flow in the polymer melt. It is cooled in a sink, cut by a granulator, dried by drum wind, and then stored. Step 5, melt spinning: the modified graphene flame retardant tetron mother granules obtained in step 4 are dried, the drying temperature is controlled within the range of 80-200 ℃, and the moisture content of the mother granules after drying is less than 100 ppm; then the mixture is heated and melted in the screw extrusion table, and then filtered through the spinning box and bundled into yarn, the yarn temperature is 270-290 ℃, and the yarn speed is 500-1500 m / min; the modified graphene cut-resistant polyester fiber is obtained. Step 6, prepare fabric: The graphene flame retardant polyester obtained in step 5 is spun into long yarns and spun into fabric. The gram weight of the resulting fabric is 100-500g / m 2 is. Step 7: The fabric is post-treated: the flame retardant liquid is separated from the flame retardant liquid by selecting the same flame retardant components and dispersing them evenly in distilled water, then thoroughly stirring and heating to 50-80℃, so that the mass concentration of the flame retardant in the liquid is 10-30%; the fabric is immersed in the liquid and after it is thoroughly soaked, it is pressed through a butter roll to remove excess liquid, and then dried on a drying rack. The drying temperature is 50-85℃ to obtain a highly flame retardant fabric. Step 8: According to the glove template, the fabric obtained in step 7 is cut and sewn to make welding protective gloves. This embodiment also provides a protective welding glove made by this method.

[0035] (Example 4) A method for preparing protective gloves for welding, including: Step 1: Choose your ingredients. The preferred raw materials by weight percentage include 60.2% PTA, 30% ethylene glycol, 8% graphene oxide, 1% flame retardant, and 0.8% modifier. Graphene oxide can be produced by mechanical exfoliation or chemical vapor deposition. The flame retardant is a homogeneous mixture of ammonium hydrogen phosphate, antimony titanium complex, and antimony trioxide in a mass ratio of 1:2:3. The modifier is obtained by uniformly mixing polyvinyl alcohol, polyethylene glycol, and silane coupling agent in a mass ratio of 1:3:4. Step 2, prepare modified PTA / GO / EG slurry. Slowly add ethylene glycol to the graphene oxide and flame retardant, and at the same time add the modifier and PTA material to the slurry. After uniform stirring, increase the temperature to 70~85℃ and process for 30~50min to obtain the modified PTA / GO / EG dispersion; the molar ratio of PTA material to EG is 1:1~4. Step 3 Esterification reaction: The slurry obtained in step 2 is added to the polymerization reactor, and the reactor is filled with nitrogen several times to remove the air from inside. The reactor is then filled with nitrogen again until the internal pressure is 0.1 to 0.5 MPa. The temperature is gradually increased and the esterification reaction is carried out under pressure in the range of 230 to 260°C. Step 4 Condensation reaction: The temperature inside the vessel is raised to 225 ~ 265 ° C, low vacuum condensation is carried out, the pressure inside the vessel is slowly lowered from normal pressure to 100 ~ 500 Pa, and then slowly raised to 270 ~ 290 ° C, the reaction time is controlled at 60 ~ 90 min, and then it is left to stand for 15 ~ 30 min, and the die casting is opened and nitrogen is filled to form a stable flow in the polymer melt. It is cooled in a sink, cut by a granulator, dried by drum wind, and then stored. Step 5, melt spinning: the modified graphene flame retardant tetron mother granules obtained in step 4 are dried, the drying temperature is controlled within the range of 80-200 ℃, and the moisture content of the mother granules after drying is less than 100 ppm; then the mixture is heated and melted in the screw extrusion table, and then filtered through the spinning box and bundled into yarn, the yarn temperature is 270-290 ℃, and the yarn speed is 500-1500 m / min; the modified graphene cut-resistant polyester fiber is obtained. Step 6, prepare fabric: The graphene flame retardant polyester obtained in step 5 is spun into long yarns and spun into fabric. The gram weight of the resulting fabric is 100-500g / m 2 is. Step 7: The fabric is post-treated: the flame retardant liquid is separated from the flame retardant liquid by selecting the same flame retardant components and dispersing them evenly in distilled water, then thoroughly stirring and heating to 50-80℃, so that the mass concentration of the flame retardant in the liquid is 10-30%; the fabric is immersed in the liquid and after it is thoroughly soaked, it is pressed through a butter roll to remove excess liquid, and then dried on a drying rack. The drying temperature is 50-85℃, and a highly flame retardant fabric is obtained. Step 8: According to the glove template, the fabric obtained in step 7 is cut and sewn to make welding protective gloves. This embodiment also provides a protective welding glove made by this method.

[0036] (Example 5) A method for preparing protective gloves for welding, including: Step 1: Choose your ingredients. The preferred raw materials, by weight percentage, contain 58% PTA, 21% ethylene glycol, 10% graphene oxide, 10% flame retardant, and 1% modifier. Graphene oxide can be produced by chemical vapor deposition or redox methods. The flame retardant was a homogeneous mixture of ammonium hydrogen phosphate, titanium complex antimony, and antimony trioxide in a mass ratio of 1:1.5:2.5. The modifier is obtained by uniformly mixing polyvinyl alcohol, polyethylene glycol, and silane coupling agent in a mass ratio of 1:2.5:3:5. Step 2, prepare modified PTA / GO / EG slurry. Slowly add ethylene glycol to the graphene oxide and flame retardant, and at the same time add the modifier and PTA material to the slurry. After uniform stirring, increase the temperature to 70~85℃ and process for 30~50min to obtain the modified PTA / GO / EG dispersion; the molar ratio of PTA material to EG is 1:1~4. Step 3 Esterification reaction: The slurry obtained in step 2 is added to the polymerization reactor, and the reactor is filled with nitrogen several times to remove the air from inside. The reactor is then filled with nitrogen again until the internal pressure is 0.1 to 0.5 MPa. The temperature is gradually increased and the esterification reaction is carried out under pressure in the range of 230 to 260°C. Step 4 Condensation reaction: The temperature inside the vessel is raised to 225 ~ 265 ° C, low vacuum condensation is carried out, the pressure inside the vessel is slowly lowered from normal pressure to 100 ~ 500 Pa, and then slowly raised to 270 ~ 290 ° C, the reaction time is controlled at 60 ~ 90 min, and then it is left to stand for 15 ~ 30 min, and the die casting is opened and nitrogen is filled to form a stable flow in the polymer melt. It is cooled in a sink, cut by a granulator, dried by drum wind, and then stored. Step 5, melt spinning: the modified graphene flame retardant tetron mother granules obtained in step 4 are dried, the drying temperature is controlled within the range of 80-200 ℃, and the moisture content of the mother granules after drying is less than 100 ppm; then the mixture is heated and melted in the screw extrusion table, and then filtered through the spinning box and bundled into yarn, the yarn temperature is 270-290 ℃, and the yarn speed is 500-1500 m / min; the modified graphene cut-resistant polyester fiber is obtained. Step 6, prepare fabric: The graphene flame retardant polyester obtained in step 5 is spun into long yarns and spun into fabric. The gram weight of the resulting fabric is 100-500g / m 2 is. Step 7: The fabric is post-treated: the flame retardant liquid is separated from the flame retardant liquid by selecting the same flame retardant components and dispersing them evenly in distilled water, then thoroughly stirring and heating to 50-80℃, so that the mass concentration of the flame retardant in the liquid is 10-30%; the fabric is immersed in the liquid and after it is thoroughly soaked, it is pressed through a butter roll to remove excess liquid, and then dried on a drying rack. The drying temperature is 50-85℃, and a highly flame retardant fabric is obtained. Step 8: According to the glove template, the fabric obtained in step 7 is cut and sewn to make welding protective gloves. This embodiment also provides a protective welding glove made by this method. The results of testing the welding protective gloves produced in each embodiment of the present invention are shown in Table 1 below.

[0037] [Table 1]

[0038] The welding protective glove and its manufacturing method provided by the present invention utilizes modified graphene oxide manufacturing dispersion system and polyester in-situ polymerization technology to first manufacture graphene flame retardant polyester fiber for welding, then manufacture flame retardant polyester fabric through weaving process, and obtain highly flame retardant fabric through flame retardant post-treatment. Finally, the glove product is made through sewing process. The glove has a high extreme oxygen index and has excellent protection against high temperature, metal sputtering and droplets caused by welding, and the fabric has sustained flame retardancy due to the synergistic flame retardant effect of graphene. Although the contents of the present invention have been described in detail using the above preferred embodiments, the above description should not be considered as limiting the present invention. Various modifications and alternatives to the present invention will be apparent to those skilled in the art upon reading the above. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims

1. A method for manufacturing a welding protective glove, comprising the steps of: Step 1: Choose the ingredients. Step 2: Prepare refined terephthalic acid / graphene oxide / ethylene glycol modified slurry. Step 3, Esterification reaction: The slurry obtained in step 2 is added to the reactor, and nitrogen is repeatedly filled in. The air inside the reactor is evacuated, and finally nitrogen is filled in again, the temperature is raised, and the pressurized esterification reaction is carried out. Step 4, consolidation reaction: keep increasing the temperature in the kettle, carry out low-vacuum consolidation, reduce the internal pressure of the kettle, increase the temperature, keep standing after the reaction, open the casting head again, fill with nitrogen gas, make the polymer melt form a stable flow, cool in water tank, cut into pieces by cutting machine and dry in drum, and store for storage; Step 5, melt spinning: the modified graphene flame retardant polyester pellets obtained in step 4 are dried, then heated and melted, and spun into bundles after filtering through a spinning box; Step 6, prepare the fabric: shuttle weaving, to make the graphene flame retardant polyester filamentary yarn woven shuttle fabric obtained in step 5; Step 7: The fabric is post-treated by mixing and heating the flame retardant treatment liquid. The fabric is then immersed in the treatment liquid, then pushed out through a pressure roller to remove excess treatment liquid, and finally dried on a drying rack to obtain a highly flame retardant fabric. Step 8: According to the glove template, the fabric obtained in step 7 is cut and sewn to make welding protective gloves.

2. The method for manufacturing a welding protective glove according to claim 1, characterized in that the raw materials in step 1 are, by mass ratio, 58% to 85% terephthalic acid, 10% to 40% ethylene glycol, 0.1% to 10% graphene oxide, 0.1% to 10% flame retardant, and 0.1% to 1% modifier.

3. The method for manufacturing a welding protective glove according to claim 2, wherein the graphene oxide is produced by any one of a mechanical exfoliation method, a chemical vapor deposition method, and an oxidation-reduction method. The flame retardant is made of diammonium hydrogen phosphate, antimony titanium complex, and antimony trioxide in a mass ratio of 1:(1-2):(2-3) and is uniformly mixed; the modifier is made of polyvinyl alcohol, polyethylene glycol, and silane coupling agent in a mass ratio of 1:(2-3):(3-4) and is uniformly mixed to produce a welding protective glove.

4. The manufacturing method of the welding protective glove according to claim 1, wherein in the step 2, the graphene oxide and the flame retardant are slowly added with ethylene glycol, while the modifier and terephthalic acid are added to the slurry, and the mixture is stirred uniformly, and then the temperature is raised to 70-85°C, and the mixture is treated for 30-50 min to obtain a modified dispersion solution, and the molar ratio of terephthalic acid to ethylene glycol is 1:1-4.

5. The manufacturing method of the welding protective glove according to claim 1, in the step 3, the obtained slurry is added to a polymerization reaction vessel, nitrogen filling is repeated several times to discharge the air in the vessel, and nitrogen filling is continued until the vessel internal pressure becomes 0.1 to 0.5 MPa, and the temperature is gradually increased until the temperature becomes 230 to 260°C, and pressurized esterification is performed.

6. The manufacturing method of the welding protective glove according to claim 1, wherein in the step 4, low vacuum consolidation is performed while increasing the temperature inside the vessel to 225 to 265°C, the temperature is gradually increased to 270 to 290°C while gradually decreasing the pressure inside the vessel from normal pressure to 100 to 500 Pa, the reaction time is controlled to 60 to 90 min, and then, after 15 to 30 min, the head is opened.

7. The method for producing a welding protective glove according to claim 1, wherein in step 5, the obtained modified graphene flame-retardant Tetron mother granules are dried at a drying temperature in the range of 80-200°C, and the moisture content of the mother granules after drying is 100 ppm or less; then the mixture is put into a screw extrusion table to be heated and melted, and then passed through a spinning box to be filtered and then bundled into yarn; the yarn temperature is 270-290°C, and the yarn speed is 500-1500 m / min, and the modified graphene cut-resistant polyester fiber is obtained.

8. The method for manufacturing a welding protective glove according to claim 1, wherein the gram weight of the fabric obtained in step 6 is 100 to 500 grams / m ２ A method for producing protective gloves for welding, comprising the steps of:

9. The manufacturing method of the welding protective glove according to claim 1, characterized in that in step 7, the flame retardant liquid is prepared by selecting the same flame retardant component separately, dispersing it uniformly in distilled water, stirring well and raising the temperature to 50-80°C, so that the mass concentration of the flame retardant in the liquid is 10-30%. The fabric is immersed in the liquid, and after being fully impregnated, it is passed through a butter roll to squeeze out the excess liquid and dried in a dryer. The drying temperature is 50-85°C.

10. A protective welding glove prepared by the method according to any one of claims 1 to 9.

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