CN111349993B - Acid-resistant flame-retardant yarn and acid-resistant textile and clothing made of same - Google Patents
Acid-resistant flame-retardant yarn and acid-resistant textile and clothing made of same Download PDFInfo
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- CN111349993B CN111349993B CN201811582004.XA CN201811582004A CN111349993B CN 111349993 B CN111349993 B CN 111349993B CN 201811582004 A CN201811582004 A CN 201811582004A CN 111349993 B CN111349993 B CN 111349993B
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
- D02G3/045—Blended or other yarns or threads containing components made from different materials all components being made from artificial or synthetic material
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B17/00—Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes
- A62B17/006—Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes against contamination from chemicals, toxic or hostile environments; ABC suits
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
- D02G3/047—Blended or other yarns or threads containing components made from different materials including aramid fibres
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
- D02G3/443—Heat-resistant, fireproof or flame-retardant yarns or threads
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/20—Cellulose-derived artificial fibres
- D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
- D10B2201/24—Viscose
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/06—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated alcohols, e.g. polyvinyl alcohol, or of their acetals or ketals
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/10—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
- D10B2321/101—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide modacrylic
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
- D10B2331/021—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides aromatic polyamides, e.g. aramides
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/14—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polycondensates of cyclic compounds, e.g. polyimides, polybenzimidazoles
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/30—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polycondensation products not covered by indexing codes D10B2331/02 - D10B2331/14
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/30—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polycondensation products not covered by indexing codes D10B2331/02 - D10B2331/14
- D10B2331/301—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polycondensation products not covered by indexing codes D10B2331/02 - D10B2331/14 polyarylene sulfides, e.g. polyphenylenesulfide
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- Business, Economics & Management (AREA)
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Abstract
The invention relates to an acid-resistant flame-retardant yarn and an acid-resistant textile and clothing made of the same, wherein the acid-resistant flame-retardant yarn mainly comprises flame-retardant fibers A and modified polyphenylene sulfide fibers B, the content of the modified polyphenylene sulfide fibers B is 30-90 wt%, the modified polyphenylene sulfide is polyphenylene sulfide in which each sulfur atom is randomly connected with N oxygen atoms, the random number refers to that N corresponding to all sulfur atoms is a random number in an interval [0,2], the molar ratio of the oxygen atoms to the sulfur atoms in the modified polyphenylene sulfide is 1.50-1.77: 1, and the yarn is resistant to acidity with the pH value of 2-3. The acid-resistant textile is woven by the acid-resistant flame-retardant yarn, and the acid-resistant garment is processed by the acid-resistant textile. The acid-resistant flame-retardant yarn disclosed by the invention is simple in preparation process, low in cost, excellent in heat resistance and acid resistance and good in application prospect; the acid-resistant textile and the acid-resistant clothing have excellent heat resistance and acid resistance and low cost.
Description
Technical Field
The invention belongs to the technical field of functional textiles, and relates to an acid-resistant flame-retardant yarn, and an acid-resistant textile and clothing made of the acid-resistant flame-retardant yarn, in particular to a flame-retardant yarn made of a mixed spun yarn of modified polyphenylene sulfide fiber and flame-retardant fiber, and a textile and clothing made of the flame-retardant yarn.
Background
In the field of chemical manufacturing, workers are in danger of burning and exploding chemicals for a long time, and particularly certain dangerous chemicals can generate acid-containing gas or liquid after deflagration, so that the harm to human bodies is very serious. The materials of the existing fireproof emergency garment are mainly aramid fibers, flame-retardant viscose or flame-retardant cotton and the like, and although the fireproof performance is excellent, the existing fireproof emergency garment cannot resist the attack of acid substances. At present, the fibers capable of resisting the acidic medium mainly comprise polypropylene fibers, polyphenylene sulfide fibers and polytetrafluoroethylene fibers, but the fibers have poor flame retardant property (the polyphenylene sulfide glass transition temperature is 150 ℃) or are difficult to meet the clothing requirements.
Therefore, the development of the yarn which has good flame retardant property and can resist acid media has practical significance.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a yarn which has good flame retardant property and can resist acid media, and acid-resistant textiles and clothing made of the yarn. According to the invention, the heat resistance and the chemical corrosion resistance of the modified polyphenylene sulfide are improved by modifying the polyphenylene sulfide, and the modified polyphenylene sulfide fiber and the flame retardant fiber are mixed and spun to prepare the yarn, wherein the yarn inherits the excellent heat resistance (flame retardant) performance of the modified polyphenylene sulfide fiber and the flame retardant fiber, and maintains the excellent chemical corrosion resistance of the modified polyphenylene sulfide fiber. In addition, the flame-retardant fiber mixed in the yarn of the invention improves the comfort and dyeability of the yarn on one hand and reduces the cost on the other hand. The yarn is suitable for being used as a raw material of clothes of emergency rescue and relief workers in the chemical field.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an acid-resistant flame-retardant yarn mainly comprises flame-retardant fibers A and modified polyphenylene sulfide fibers B, wherein the content of the modified polyphenylene sulfide fibers B is 30-90 wt%, the modified polyphenylene sulfide is polyphenylene sulfide in which each sulfur atom is randomly connected with N oxygen atoms, the random number refers to a random number in which N corresponding to all sulfur atoms is a range [0,2], and the random number is a clear mathematical concept, the number of oxygen atoms connected with sulfur atoms in the polyphenylene sulfide is 0, 1 or 2, at least one sulfur atom is connected with 0 oxygen atom, at least one sulfur atom is connected with 2 oxygen atoms, the molar ratio of the oxygen atoms to the sulfur atoms in the modified polyphenylene sulfide is 1.50-1.77: 1, and a person skilled in the art can adjust the molar ratio of the oxygen atoms to the sulfur atoms within a certain range, but the adjustment range is not too large, and the molar ratio is too large, so that the strength of the polyphenylene sulfide is influenced; the molar ratio is too small, oxygen atom grafting is insufficient, and the heat resistance is not obviously improved; the molar ratio is the range of molar ratio which is obviously improved on the heat resistance after the research of the invention;
according to the invention, the heat resistance of the modified polyphenylene sulfide is greatly improved without influencing the acid and alkali resistance of the polyphenylene sulfide by modifying the polyphenylene sulfide, the fiber is prepared from the modified polyphenylene sulfide, and the fiber is blended with the flame-retardant fiber with good heat resistance to prepare the flame-retardant yarn, the flame-retardant yarn inherits the excellent heat resistance (flame retardance) of the modified polyphenylene sulfide and the flame-retardant fiber, and meanwhile, the modified polyphenylene sulfide fiber endows the flame-retardant yarn with good chemical (acid) corrosion resistance. In addition, the addition of the flame-retardant fiber improves the comfort and dyeability of the yarn on the one hand and reduces the cost on the other hand.
As a preferred technical scheme:
according to the acid-resistant flame-retardant yarn, the tensile strength retention rate of the acid-resistant flame-retardant yarn is more than or equal to 70% after the acid-resistant flame-retardant yarn is soaked in a solution with the temperature of 80 ℃ and the pH value of 2-3 for 2 hours.
The acid-resistant flame-retardant yarn is prepared by the following steps: and mixing the flame-retardant fiber A and the modified polyphenylene sulfide fiber B, and then preparing the yarn by adopting a ring spinning method, a compact spinning method, a siro spinning method, a vortex spinning method or an air spinning method. The method of spinning the yarn of the present invention is not limited thereto, and only a viable spinning method is exemplified here.
The LOI of the flame-retardant fiber A is more than or equal to 28 percent; the flame-retardant fiber A is more than one of flame-retardant viscose, flame-retardant modacrylic, flame-retardant vinylon, meta-aramid, para-aramid, polysulfonamide, polyimide fiber, melamine fiber, polyoxadiazole fiber, polybenzazole fiber and polypyridazole fiber. The type of the flame-retardant fibers A and the performance parameters thereof are not limited thereto, and those skilled in the art can select them according to actual needs. Those skilled in the art can further reduce the cost if ordinary fibers are used instead of flame retardant fibers, but will reduce the flame retardant properties of the yarn to some extent.
The acid-resistant flame-retardant yarn has the advantages that the glass transition temperature of the modified polyphenylene sulfide is more than or equal to 410 ℃, the LOI (LOI) is more than or equal to 32 percent, and no molten drop is generated during combustion. The LOI of common polyphenylene sulfide is less than 32%, and molten drops are generated during combustion. The invention overcomes the defect of molten drop generation during combustion by modifying the polyphenylene sulfide, and obviously improves the flame retardant property of the polyphenylene sulfide.
The preparation method of the modified polyphenylene sulfide of the acid-resistant flame-retardant yarn comprises the following steps: under the action of catalyst, atomic oxygen in ozone is grafted to sulfur atom of polyphenylene sulfide through electron irradiation. According to the invention, an electron irradiation method is selected as a modification method, so that the reaction time is short, and energy can be accurately and rapidly provided; meanwhile, ozone is selected as an oxygen atom raw material, the oxidation activity of the ozone is high, and the oxidation grafting rate can be controlled more accurately by adjusting the flow of the ozone. In addition, the grafting oxidation process does not influence the excellent acid and alkali resistance of the polyphenylene sulfide.
The preparation method of the acid-resistant flame-retardant yarn comprises the following steps:
(1) dipping polyphenylene sulfide into an aqueous solution of a catalyst;
(2) continuously introducing ozone into the system in the step (1), fully mixing, and simultaneously irradiating the system in the step (1) by using a high-energy electron beam with energy of 0.1-10 Mev to perform grafting reaction until the weight of the system is increased by 22-26 wt%; under the action of a catalyst, through high-energy electron radiation, a part of oxygen atoms provided by ozone react with polyphenylene sulfide to graft oxygen atoms on sulfur atoms in polyphenylene sulfide molecules, the form of grafting the oxygen atoms on the polyphenylene sulfide is a random order state, and the intensity of the polyphenylene sulfide is influenced due to the overlarge energy of high-energy electron beams; the energy of the high-energy electron beam is too small, so that oxygen atoms are difficult to be grafted on sulfur atoms of polyphenylene sulfide sufficiently, and the heat resistance is not obviously improved;
(3) and taking out the reaction product, and washing and drying to obtain the modified polyphenylene sulfide.
An acid resistant flame retardant yarn as described above, said polyphenylene sulfide being in the form of fibers; the concentration of the aqueous solution of the catalyst is 0.1 wt% -0.5 wt%, and the concentration of the aqueous solution of the catalyst can be adjusted within a certain range by a person skilled in the art, but the adjustment range is not too large, and the concentration is too large, so that the waste of the catalyst is caused, and the cost is increased; the concentration is too low, oxygen atoms are difficult to be sufficiently grafted on sulfur atoms of polyphenylene sulfide, and the heat resistance is not obviously improved; the catalyst is potassium permanganate or sodium perborate; the mass ratio of the adding amount of the polyphenylene sulfide to the adding amount of the catalyst in the system in the step (1) is 100-200: 1, and a person skilled in the art can adjust the mass ratio within a certain range, but the adjusting range is not too large, the mass ratio is too large, oxygen atoms are difficult to be grafted on sulfur atoms of the polyphenylene sulfide sufficiently, and the heat resistance is not obviously improved; the mass ratio is too small, namely the adding amount of the catalyst is too much, so that the waste of the catalyst is caused, and the cost is increased; the flow rate of the ozone is M g/min, M is 1-2 times of the mass of the polyphenylene sulfide in the step (1), the oxidation grafting rate can be accurately controlled by controlling the flow rate of the ozone, so that the performance of a product is controlled, the flow rate of the ozone can be adjusted within a proper range, but the flow rate of the ozone is not too high, and the strength of the polyphenylene sulfide is influenced due to the overlarge flow rate of the ozone; the flow of ozone is too small, the grafting of oxygen atoms is insufficient, and the heat resistance is not obviously improved.
The invention also provides a heat-resistant flame-retardant and acid-resistant textile which is woven by the acid-resistant flame-retardant yarn.
The invention also provides heat-resistant, flame-retardant and acid-resistant clothes which are made of the acid-resistant textile.
The invention mechanism is as follows:
the invention prepares the modified polyphenylene sulfide into fiber and then blends the fiber with flame retardant fiber with good flame retardant property to prepare the acid-resistant flame retardant yarn, wherein, the modified polyphenylene sulfide is prepared by selecting an electron irradiation method as a modification method and taking ozone as an oxygen atom raw material to modify the polyphenylene sulfide, the reaction time of the electron irradiation method is short and can accurately and quickly provide energy, the oxidation activity of the ozone is high, the oxidation grafting rate can be controlled more accurately by adjusting the flow of the ozone, the oxygen atom is grafted on the polyphenylene sulfide, so that the electron cloud density of a benzene ring is reduced by the conjugation effect formed by a sulfur-oxygen bond, the vitrification temperature is obviously improved, the heat resistance of the polyphenylene sulfide is further improved, meanwhile, the grafting of the oxygen atom also improves the flame retardant property of the polyphenylene sulfide, and has no adverse effect on the excellent chemical (acid) corrosion resistance of the polyphenylene sulfide, the modified polyphenylene sulfide fiber and the flame retardant fiber which are main components of the flame retardant yarn have excellent flame retardant property, so the flame retardant yarn has excellent flame retardant property, and the modified polyphenylene sulfide fiber in the flame retardant yarn has excellent heat resistance and chemical (acid) corrosion resistance, so the acid-resistant flame retardant yarn has excellent heat resistance and chemical (acid) corrosion resistance, and textiles and clothing made of the acid-resistant flame retardant yarn also have excellent heat resistance and chemical (acid) corrosion resistance.
Has the advantages that:
(1) the acid-resistant flame-retardant yarn disclosed by the invention is simple in preparation process, low in cost, excellent in heat resistance and acid resistance and good in application prospect;
(2) the acid-resistant flame-retardant textile and the acid-resistant flame-retardant garment have excellent heat resistance and acid resistance, good mechanical property and low cost, and are suitable for being used as garments of emergency rescue and relief workers in the chemical field.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
The preparation method of the acid-resistant flame-retardant yarn comprises the following steps:
(1) preparing modified polyphenylene sulfide;
(1.1) 400kg of polyphenylene sulfide in a fibrous form having a fineness of 1.5 denier and a length of 51mm was immersed in 1000kg of an aqueous solution of 0.2 wt% potassium permanganate;
(1.2) continuously introducing ozone into the system in the step (1.1), fully mixing, and simultaneously irradiating the system in the step (1.1) by using a high-energy electron beam with the energy of 10Mev to carry out grafting reaction until the weight of the system is increased by 26 wt%, wherein the flow rate of the ozone is 800 kg/min.
(1.3) taking out the reaction product, washing and drying to prepare modified polyphenylene sulfide;
the prepared modified polyphenylene sulfide has the glass transition temperature of 430 ℃ and the LOI of 38 percent, no molten drop is generated during combustion, and the molar ratio of oxygen atoms to sulfur atoms in the modified polyphenylene sulfide is 1.77: 1;
(2) preparing acid-resistant flame-retardant yarns;
and (2) mixing the flame-retardant viscose fiber with the LOI of 28%, the fineness of 1.5 deniers and the length of 51mm with the modified polyphenylene sulfide fiber prepared in the step (1), and preparing the acid-resistant 20-inch flame-retardant yarn by adopting a ring spinning method, wherein the content of the modified polyphenylene sulfide fiber is 30 wt%.
The tensile strength retention of the acid-resistant flame-retardant yarn obtained was 70% after soaking in a solution having a temperature of 80 ℃ and a pH of 3 for 2 hours. The flame retardant LOI of the flame retardant yarn was 30%.
The manufactured acid-resistant flame-retardant yarn is woven by a rapier loom to obtain an acid-resistant flame-retardant plain woven textile, and the acid-resistant flame-retardant clothing is manufactured after the acid-resistant textile is processed.
Example 2
The preparation method of the acid-resistant flame-retardant yarn comprises the following steps:
flame-retardant modacrylic fiber with the LOI of 30 percent and the length of 51mm is mixed with the modified polyphenylene sulfide fiber prepared in the example 1 to prepare the acid-resistant flame-retardant 30-inch flame-retardant yarn by adopting a compact spinning method, wherein the content of the modified polyphenylene sulfide fiber is 90 weight percent.
The tensile strength retention of the acid-resistant flame-retardant yarn obtained was 95% after soaking in a solution having a temperature of 80 ℃ and a pH of 2.5 for 2 hours. The flame retardant LOI of the flame retardant yarn was 36%.
The prepared acid-resistant flame-retardant yarn is knitted and woven by a circular knitting machine to obtain an acid-resistant flame-retardant knitted textile, and the acid-resistant flame-retardant knitted textile is processed to obtain the acid-resistant flame-retardant knitted garment.
Example 3
The preparation method of the acid-resistant flame-retardant yarn comprises the following steps:
flame-retardant vinylon fibers with the LOI of 29 percent, the fineness of 1.5 deniers and the length of 51mm and the modified polyphenylene sulfide fibers obtained in the example 1 are mixed and then are made into 40-inch flame-retardant yarns with acid resistance and flame retardance by adopting a siro spinning method, wherein the content of the modified polyphenylene sulfide fibers is 50 weight percent.
The tensile strength retention of the acid-resistant flame-retardant yarn obtained was 85% after soaking in a solution having a temperature of 80 ℃ and a pH of 2 for 2 hours. The flame retardant LOI of the flame retardant yarn was 33%.
The prepared acid-resistant flame-retardant yarn is knitted by a warp knitting machine to obtain an acid-resistant flame-retardant warp-knitted textile, and the acid-resistant flame-retardant textile is processed to obtain the acid-resistant flame-retardant clothing lining.
Example 4
The preparation method of the acid-resistant flame-retardant yarn comprises the following steps:
the 21-inch flame-retardant yarn with acid resistance and flame retardance is prepared by mixing meta-aramid fiber with the LOI of 28 percent, the fineness of 1.5 deniers and the length of 51mm with the modified polyphenylene sulfide fiber obtained in the example 1 and adopting a vortex spinning method, wherein the content of the modified polyphenylene sulfide fiber is 60 weight percent.
The tensile strength retention of the acid-resistant flame-retardant yarn obtained after soaking in a solution with a temperature of 80 ℃ and a pH of 2 for 2 hours was 92%. The flame retardant LOI of the flame retardant yarn was 36%.
The prepared acid-resistant flame-retardant yarn is woven by a flat knitting machine to obtain an acid-resistant flame-retardant wool knitted textile, and the acid-resistant flame-retardant wool sweater garment is prepared after the acid-resistant flame-retardant textile is processed.
Example 5
The preparation method of the acid-resistant flame-retardant yarn comprises the following steps:
an polysulfonamide fiber having an LOI of 33% and a fineness of 1.5 denier and a length of 51mm and the modified polyphenylene sulfide fiber obtained in example 1 were mixed and then spun into 30-inch acid-resistant flame-retardant yarns by a vortex spinning method, wherein the content of the modified polyphenylene sulfide fiber was 70 wt%.
The tensile strength retention of the acid-resistant flame-retardant yarn obtained after soaking in a solution having a temperature of 80 ℃ and a pH of 2 for 2 hours was 94%. The flame retardant LOI of the flame retardant yarn was 37%.
The manufactured acid-resistant flame-retardant yarn is woven by a rapier loom to obtain an acid-resistant flame-retardant twill woven textile, and the acid-resistant flame-retardant textile is processed to obtain the acid-resistant flame-retardant outer clothing.
Example 6
The preparation method of the acid-resistant flame-retardant yarn comprises the following steps:
after mixing the para-aramid fiber with the LOI of 28 percent, the fineness of 1.5 deniers and the length of 51mm and the modified polyphenylene sulfide fiber obtained in the example 1, 5-inch acid-resistant flame-retardant yarn is prepared by adopting an air spinning method, wherein the content of the modified polyphenylene sulfide fiber is 50wt percent.
The tensile strength retention of the acid-resistant flame-retardant yarn obtained was 90% after soaking in a solution having a temperature of 80 ℃ and a pH of 2.4 for 2 hours. The flame retardant LOI of the flame retardant yarn was 32%.
The manufactured acid-resistant flame-retardant yarn is woven by a rapier loom to obtain an acid-resistant flame-retardant twill woven textile, and the acid-resistant flame-retardant textile is processed to obtain the acid-resistant flame-retardant outer clothing.
Example 7
The preparation method of the acid-resistant flame-retardant yarn comprises the following steps:
(1) preparing modified polyphenylene sulfide;
(1.1) dipping 100kg of polyphenylene sulfide in a fibrous state having a fineness of 2.0 denier and a length of 51mm in 1000kg of an aqueous solution of 0.1 wt% potassium permanganate;
(1.2) continuously introducing ozone into the system in the step (1.1), fully mixing, and simultaneously irradiating the system in the step (1.1) by using a high-energy electron beam with the energy of 0.1Mev until the weight of the system is increased by 22 wt%, wherein the flow rate of the ozone is 100 kg/min.
(1.3) taking out the reaction product, washing and drying to prepare modified polyphenylene sulfide;
the prepared modified polyphenylene sulfide has the glass transition temperature of 410 ℃, the LOI of 32 percent, no molten drop during combustion and the molar ratio of oxygen atoms to sulfur atoms in the modified polyphenylene sulfide of 1.5: 1;
(2) preparing acid-resistant flame-retardant yarns;
mixing polyimide fiber with the LOI of 28 percent, the fineness of 2.0 denier and the length of 51mm with the modified polyphenylene sulfide fiber prepared in the step (1), and preparing 40-inch acid-resistant flame-retardant yarn by a ring spinning method, wherein the content of the modified polyphenylene sulfide fiber is 30wt percent.
The tensile strength retention of the acid-resistant flame-retardant yarn obtained was 90% after soaking in a solution having a temperature of 80 ℃ and a pH of 3 for 2 hours. The flame retardant LOI of the flame retardant yarn was 30%.
The manufactured acid-resistant flame-retardant yarn is woven by a rapier loom to obtain an acid-resistant flame-retardant segmented-grain woven textile, and the acid-resistant flame-retardant garment is manufactured after the acid-resistant flame-retardant textile is processed.
Example 8
The preparation method of the acid-resistant flame-retardant yarn comprises the following steps:
(1) preparing modified polyphenylene sulfide;
(1.1) impregnating 750kg of polyphenylene sulfide in a fibrous state having a fineness of 3.0 denier and a length of 51mm in 1000kg of an aqueous solution of 0.5 wt% potassium permanganate;
(1.2) continuously introducing ozone into the system in the step (1.1), fully mixing, and simultaneously irradiating the system in the step (1.1) by using a high-energy electron beam with energy of 5Mev to carry out grafting reaction until the weight of the system is increased by 24 wt%, wherein the flow rate of the ozone is 900 kg/min.
(1.3) taking out the reaction product, washing and drying to prepare modified polyphenylene sulfide;
the prepared modified polyphenylene sulfide has the glass transition temperature of 420 ℃, the LOI of 35 percent, no molten drop during combustion, and the molar ratio of oxygen atoms to sulfur atoms in the modified polyphenylene sulfide is 1.62: 1;
(2) preparing acid-resistant flame-retardant yarns;
mixing 3.0 denier of flame-retardant viscose fiber with the LOI of 28 percent and the length of 51mm, polyimide fiber with the LOI of 30 percent and the length of 3.0 denier of polyimide fiber with the length of 51mm and the modified polyphenylene sulfide fiber prepared in the step (1), and preparing 10-inch acid-resistant flame-retardant yarn by a ring spinning method, wherein the content of the modified polyphenylene sulfide fiber is 30 weight percent, and the content of the polyimide fiber is 20 weight percent.
The tensile strength retention of the acid-resistant flame-retardant yarn obtained was 82% after soaking in a solution having a temperature of 80 ℃ and a pH of 2.5 for 2 hours. The flame retardant LOI of the flame retardant yarn was 34%.
The manufactured acid-resistant flame-retardant yarn is woven by a rapier loom to obtain an acid-resistant flame-retardant woven textile with a square structure, and the acid-resistant flame-retardant textile is processed to obtain the acid-resistant flame-retardant outer clothing.
Examples 9 to 11
The preparation method of the acid-resistant flame-retardant yarn is basically the same as that in the embodiment 6, and is different from the step (2.2) of the fiber blended with the modified polyphenylene sulfide fiber and the performance parameters of the prepared yarn, specifically, see the following table, wherein LOI is an LOI value of the fiber blended with the modified polyphenylene sulfide fiber, and the tensile strength retention rate is the tensile strength retention rate of the fiber after the fiber is soaked in a solution with the temperature of 80 ℃ and the pH of 3 for 2 hours.
| Fiber | LOI | Strength retention ratio | |
| Example 9 | Pyrimethanil fibre | 30 | 92％ |
| Example 10 | Polyoxadiazole fibers | 28 | 75％ |
| Example 11 | Polybenzazole fibers | 29 | 93％ |
| Example 12 | Polypyridazole fiber | 29 | 93％ |
Claims (9)
1. An acid-resistant flame-retardant yarn is characterized in that: the flame-retardant polyphenylene sulfide fiber mainly comprises a flame-retardant fiber A and a modified polyphenylene sulfide fiber B, wherein the content of the modified polyphenylene sulfide fiber B is 30-90 wt%, the modified polyphenylene sulfide is polyphenylene sulfide in which each sulfur atom is randomly connected with N oxygen atoms, the random number refers to that N corresponding to all the sulfur atoms is a random number in an interval [0,2], and the molar ratio of the oxygen atoms to the sulfur atoms in the modified polyphenylene sulfide is 1.50-1.77: 1.
2. The acid-resistant flame-retardant yarn according to claim 1, wherein the tensile strength retention of the acid-resistant flame-retardant yarn is not less than 70% after the acid-resistant flame-retardant yarn is soaked in a solution with the temperature of 80 ℃ and the pH value of 2-3 for 2 hours.
3. The acid-resistant flame-retardant yarn as claimed in claim 1, which is prepared by the following steps: and mixing the flame-retardant fiber A and the modified polyphenylene sulfide fiber B, and then preparing the yarn by adopting a ring spinning method, a compact spinning method, a siro spinning method, a vortex spinning method or an air spinning method.
4. The acid-resistant flame-retardant yarn as claimed in claim 3, wherein the LOI of the flame-retardant fiber A is not less than 28%; the flame-retardant fiber A is more than one of flame-retardant viscose, flame-retardant modacrylic, flame-retardant vinylon, meta-aramid, para-aramid, polysulfonamide, polyimide fiber, melamine fiber, polyoxadiazole fiber, polybenzazole fiber and polypyridazole fiber.
5. The acid-resistant flame-retardant yarn according to claim 1, wherein the modified polyphenylene sulfide has a glass transition temperature of 410 ℃ or higher, an LOI of 32% or higher, and no generation of molten drops when burned.
6. The acid-resistant flame-retardant yarn as claimed in claim 1, wherein the modified polyphenylene sulfide is prepared by the following steps: under the action of catalyst, atomic oxygen in ozone is grafted to sulfur atom of polyphenylene sulfide through electron irradiation.
7. The acid-resistant flame-retardant yarn according to claim 6, wherein the modified polyphenylene sulfide is prepared by the following steps:
(1) dipping polyphenylene sulfide into an aqueous solution of a catalyst;
(2) continuously introducing ozone into the system in the step (1), fully mixing, and simultaneously irradiating the system in the step (1) by using a high-energy electron beam with energy of 0.1-10 Mev to perform grafting reaction until the weight of the system is increased by 22-26 wt%;
(3) and taking out the reaction product, and washing and drying the reaction product.
8. The acid-resistant flame-retardant yarn of claim 7, wherein the polyphenylene sulfide is in the form of fibers; the concentration of the aqueous solution of the catalyst is 0.1-0.5 wt%; the catalyst is potassium permanganate or sodium perborate; the mass ratio of the adding amount of the polyphenylene sulfide to the adding amount of the catalyst in the system in the step (1) is 100-200: 1; the flow rate of the ozone is Mg/min, and M is 1-2 times of the mass of the polyphenylene sulfide in the step (1).
9. Acid resistant textiles characterized by: woven from an acid resistant flame retardant yarn according to any of claims 1 to 8.
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