CN120844254A - High-strength flame-retardant aramid fiber and biomass fiber blended yarn and preparation method thereof - Google Patents

High-strength flame-retardant aramid fiber and biomass fiber blended yarn and preparation method thereof

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Publication number
CN120844254A
CN120844254A CN202510846805.6A CN202510846805A CN120844254A CN 120844254 A CN120844254 A CN 120844254A CN 202510846805 A CN202510846805 A CN 202510846805A CN 120844254 A CN120844254 A CN 120844254A
Authority
CN
China
Prior art keywords
fiber
aramid
biomass
yarn
blended yarn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202510846805.6A
Other languages
Chinese (zh)
Inventor
何明春
郭荣辉
王萍
姜珊
魏磊
景小玲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yibin Pingshan Fanglian Technology Development Co ltd
Sichuan University
Original Assignee
Yibin Pingshan Fanglian Technology Development Co ltd
Sichuan University
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Filing date
Publication date
Application filed by Yibin Pingshan Fanglian Technology Development Co ltd, Sichuan University filed Critical Yibin Pingshan Fanglian Technology Development Co ltd
Priority to CN202510846805.6A priority Critical patent/CN120844254A/en
Publication of CN120844254A publication Critical patent/CN120844254A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/38—Threads in which fibres, filaments, or yarns are wound with other yarns or filaments, e.g. wrap yarns, i.e. strands of filaments or staple fibres are wrapped by a helically wound binder yarn
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/77—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof
    • D06M11/79—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof with silicon dioxide, silicic acids or their salts
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/50—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with organometallic compounds; with organic compounds containing boron, silicon, selenium or tellurium atoms
    • D06M13/51—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond
    • D06M13/513—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond with at least one carbon-silicon bond
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M2101/34—Polyamides
    • D06M2101/36—Aromatic polyamides
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/30—Flame or heat resistance, fire retardancy properties
    • 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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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

The invention discloses a high Jiang Zuran aramid fiber and biomass fiber blended yarn and a preparation method thereof, and relates to the field of functional textile materials, wherein the preparation method comprises the following steps of S1, carrying out in-situ silica implantation pretreatment on aramid short fibers; S3, mixing the aramid fiber raw strips and the biomass short fiber raw strips, merging the aramid fiber filaments and the outer wrapping strands, forming core-spun yarns by using a twisting device, and collecting the core-spun yarns by using a spun yarn guide hook to obtain the blended yarns. Through the modification of the aramid staple fibers, the core-spun yarn structure of the core-spun aramid filaments, the outer cladding aramid staple fibers and the biomass staple fibers is combined to cooperate, the spinnability is greatly improved, the breakage rate is reduced, the bottleneck that the strength and the comfort of the traditional blended yarn are difficult to consider is broken, the synergistic effect of the flame retardant performance is realized, and the yarn can still maintain a stable protection function in an extreme environment, so that the high-strength, flame retardant and skin-friendly comfort are considered, and the application scene of the functional blended yarn is widened.

Description

High Jiang Zuran aramid fiber and biomass fiber blended yarn and preparation method thereof
Technical Field
The invention relates to the technical field of functional textile materials, in particular to a high Jiang Zuran aramid fiber and biomass fiber blended yarn and a preparation method thereof.
Background
The aramid fiber is called as "polyphenyl dicarboxyl phenylenediamine" and has the excellent performances of super-high strength, high modulus, high temperature resistance, acid and alkali resistance, light weight and the like. In the field of individual protection, the aramid fiber can be made into bulletproof clothes, bulletproof helmets, bulletproof armor and the like, firefighters, fire masks, military police training clothes, cutting-resistant gloves and the like, and in the field of civil use, the aramid fiber can be made into flame-retardant inner decorations and fabrics of airplanes, automobiles and high-speed rails, and can be made into fireproof carpets, escape ropes, flame-retardant curtains, bedspreads, night clothes, tablecloths, aprons, microwave oven gloves and the like. But the pure aramid yarn has the problems of high price, high fiber rigidity, stiff yarn hand feeling, poor fiber loose cohesion, easy static electricity generation, complex pure spinning processing technology, high production cost, poor hygroscopicity (moisture regain < 4.5%), poor wearing comfort and the like, and greatly influences the application and popularization of the aramid fiber.
The aramid fiber is blended with biomass fiber materials (such as cotton, hemp, silk, wool and the like) with high cost performance, good spinnability and good wear performance, so that the production cost can be reduced, the spinnability of the yarn is improved, the blending proportion can be adjusted according to the flame-retardant and heat-resistant requirements of the product, the advantages of the fiber in the blended fabric are complemented, and the added value of the product is improved.
However, when aramid fiber and biomass fiber are blended, the problems of reduced yarn strength, high spinning breakage rate and the like are easy to occur due to large fiber performance difference (such as modulus, length, friction coefficient and the like), and the problems seriously affect the quality and the production efficiency of the blended composite yarn in actual production. Therefore, under the current technical conditions, the blending of the aramid fiber and the biomass fiber is difficult to realize an ideal spinning effect, and the requirements of high-quality production cannot be met.
Accordingly, there is a need for an improvement over the deficiencies in the prior art to address the above-described issues.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides a high Jiang Zuran aramid fiber and biomass fiber blended yarn and a preparation method thereof, and aims to solve the problems of loose fiber, poor spinnability, poor wearing performance and the like of the conventional aramid fiber yarn, and simultaneously has excellent flame retardance, strength and skin-friendly comfort.
In order to achieve the aim, the technical scheme adopted by the invention is that the preparation method of the high Jiang Zuran aramid fiber and biomass fiber blended yarn comprises the following steps:
s1, soaking an aramid short fiber in a silane coupling agent solution, stirring at a certain temperature, placing the treated aramid short fiber in an ammonia water ethanol solution containing tetraethoxysilane for polycondensation reaction, washing and drying to obtain an aramid/silicon dioxide hybrid fiber;
s2, respectively opening, carding and drawing the aramid short fibers and the biomass short fibers pretreated in the step S1 to obtain aramid raw strips and biomass short fiber raw strips;
s3, mixing the aramid fiber raw sliver and the biomass short fiber raw sliver, enabling the mixed sliver to enter a spinning frame drafting device through a traction roller, feeding the aramid fiber filaments at the rear side of a front roller jaw, converging the aramid fiber filaments with the outer wrapping sliver, forming core spun yarns by utilizing a twisting device, and collecting the core spun yarns by a spun yarn guide hook to obtain mixed yarns.
In a preferred embodiment of the present invention, in the step S1, the aramid short fiber is one of para-aramid fiber, meta-aramid fiber and heterocyclic aramid fiber, and the length of the aramid short fiber is 25-50 mm, and the fineness is 1-2.5 dtex.
In a preferred embodiment of the present invention, in the step S1, the silane coupling agent is one of KH550, KH560, KH570, KH792, the concentration is 2-10%, and the solvent is dimethyl sulfoxide and water with a mass ratio of 1:1.
In a preferred embodiment of the invention, in the step S1, the stirring treatment is performed at a temperature of 80-100 ℃ for 1-1.5 hours, the concentration of tetraethoxysilane in the polycondensation reaction tank is 1-5%, the concentration of ammonia water is 1-5%, the ratio of water to ethanol is 1:1, the temperature of the polycondensation reaction is 25-50 ℃ for 2-10 hours, and the drying temperature is 100-110 ℃ for 10-30 minutes.
In a preferred embodiment of the present invention, in the step S2, the biomass short fiber is one of cotton fiber, hemp fiber, silk fiber, wool fiber, viscose fiber, lyocell fiber, bamboo pulp fiber, alginate fiber, protein fiber, polylactic acid fiber, and chitin fiber, and the length of the biomass short fiber is 10-60 mm, and the fineness is 1-10 dtex.
In a preferred embodiment of the present invention, in the step S3, the ration of the outer wrapping fiber strip after the blending and drawing is 4-7 g/10m, and the aramid fiber in the roving accounts for 30-70%.
In a preferred embodiment of the present invention, in the step S3, the draft multiple of the spinning frame is 20-40, the twisting direction of the core spun yarn is Z-twist, the twisting degree is 400-600 t/m, and the vehicle speed is 7000-10000 r/min.
In a preferred embodiment of the present invention, in the step S3, the aramid filament is one of para-aramid, meta-aramid and heterocyclic aramid, and the fineness of the aramid filament is 50-110 d.
In a preferred embodiment of the present invention, in the step S3, the yarn weight of the blended yarn is 20-50 tex, wherein the core yarn accounts for 20-50%, and the aramid fiber of the whole fiber accounts for 40-90%.
The invention provides a high Jiang Zuran aramid fiber and biomass fiber blended yarn which is prepared by the preparation method of any one of the above, wherein the blended yarn comprises an aramid filament of a core layer, and an aramid staple fiber and a biomass staple fiber which are compositely twisted on the core layer.
The invention solves the defects existing in the background technology, and has the following beneficial effects:
(1) According to the high Jiang Zuran aramid fiber and biomass fiber blended yarn and the preparation method thereof, through modification of the aramid fiber short fiber and cooperation of the core layer aramid fiber filament, the outer cladding aramid fiber short fiber and the core spun yarn structure of the biomass short fiber, the problem caused by performance difference of the aramid fiber and the biomass fiber is effectively solved, spinnability is greatly improved, the breakage rate is reduced, the filament is used as a composite structure of core and short fiber blended cladding, the moisture absorption and air permeability of the yarn are optimized through the biomass fiber while the high strength characteristic of the aramid fiber is maintained, the bottleneck that the strength and comfort of the traditional blended yarn are difficult to consider is broken, and the synergistic effect of the flame retardant performance is realized through combination of the specific aramid fiber and the biomass fiber, so that the yarn can still maintain stable protection function in an extreme environment, and the application scene of the high-strength, flame retardant and skin-friendly comfort is widened.
(2) According to the method, the in-situ silica implantation pretreatment of the aramid staple fibers is carried out, an active reaction site is constructed on the surfaces of the fibers by using a silane coupling agent, hydrolysis polycondensation of the ethyl orthosilicate is induced to form a nanoscale silica composite layer, the surface roughness and polarity of the aramid staple fibers are remarkably improved, the interface combination between the aramid staple fibers and the biomass staple fibers can be enhanced, the cohesive force defect caused by the excessively high modulus of the aramid fibers is effectively overcome, and further, in spinning, the arrangement of the whisker structures is more compact and uniform, and the stability of the whisker structures is improved, so that the strength and evenness uniformity of blended yarns are improved, the problem of frequent breakage in the traditional spinning process is solved, and the spinning breakage rate is greatly reduced.
(3) According to the invention, by accurately controlling the twist of the core spun yarn, the radial cohesion force generated by specific twist angle can be utilized to enable the aramid filament, the aramid staple and the biomass staple to be mutually wound with reasonable tightness, so that the defect of weak interface combination of high-modulus aramid and flexible biomass fibers is effectively overcome, the internal stress of the fibers is balanced, the structural instability phenomena such as fiber slippage and core yarn exposure caused by too low twist are avoided, the problems of yarn stiffness and internal stress concentration caused by high twist are avoided, and the improvement of the strength, uniformity and spinnability of the blended yarn is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art;
FIG. 1 is a schematic cross-sectional view of a blended yarn according to a preferred embodiment of the present invention;
FIG. 2 is a schematic side structural view of a blended yarn according to a preferred embodiment of the present invention;
in the figure, 1 part of aramid filament, 2 parts of aramid staple fiber and 3 parts of biomass staple fiber.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
The raw materials, equipment, reagents and the like used in the invention can be purchased in the market or prepared by the prior art.
A preparation method of a high Jiang Zuran aramid fiber and biomass fiber blended yarn comprises the following steps:
s1, soaking an aramid short fiber in a silane coupling agent solution, stirring at a certain temperature, placing the treated aramid short fiber in an ammonia water ethanol solution containing tetraethoxysilane for polycondensation reaction, washing and drying to obtain an aramid/silicon dioxide hybrid fiber;
s2, respectively opening, carding and drawing the aramid short fibers and the biomass short fibers pretreated in the step S1 to obtain aramid raw strips and biomass short fiber raw strips;
s3, mixing the aramid fiber raw sliver and the biomass short fiber raw sliver, enabling the mixed sliver to enter a spinning frame drafting device through a traction roller, feeding the aramid fiber filaments at the rear side of a front roller jaw, converging the aramid fiber filaments with the outer wrapping sliver, forming core spun yarns by utilizing a twisting device, and collecting the core spun yarns by a spun yarn guide hook to obtain mixed yarns.
In some specific embodiments, in the step S1, the aramid short fiber is one of para-aramid, meta-aramid and heterocyclic aramid, the length of the aramid short fiber is 25-50 mm, and the fineness is 1-2.5 dtex.
In some specific embodiments, in the step S1, the silane coupling agent is one of KH550, KH560, KH570, KH792, the concentration is 2-10%, and the solvent is dimethyl sulfoxide and water with a mass ratio of 1:1.
In some specific embodiments, in the step S1, the stirring treatment is performed at a temperature of 80-100 ℃ for 1-1.5 hours, the concentration of tetraethoxysilane in a polycondensation reaction tank is 1-5%, the concentration of ammonia water is 1-5%, the ratio of water to ethanol is 1:1, the temperature of polycondensation reaction is 25-50 ℃ for 2-10 hours, the drying temperature is 100-110 ℃ for 10-30 minutes.
In some specific embodiments, in the step S2, the biomass short fiber is one of cotton fiber, fibrilia, silk fiber, wool fiber, viscose fiber, lyocell fiber, bamboo pulp fiber, alginate fiber, protein fiber, polylactic acid fiber and chitin fiber, and the length of the biomass short fiber is 10-60 mm, and the fineness of the biomass short fiber is 1-10 dtex.
In some specific embodiments, in the step S3, the ration of the outer wrapping strand after the blending and drawing is 4-7 g/10m, and the aramid fiber in the roving accounts for 30-70%.
In some specific embodiments, in the step S3, the draft multiple of the spinning frame is 20-40, the twisting direction of the core yarn is Z twisting, the twisting degree is 400-600T/m, and the vehicle speed is 7000-10000 r/min.
In some specific embodiments, in the step S3, the aramid filaments are one of para-aramid, meta-aramid and heterocyclic aramid, and the fineness of the aramid filaments is 50-110 d.
In some specific embodiments, in the step S3, the yarn weight of the blended yarn is 20-50 tex, wherein the core yarn accounts for 20-50%, and the integral fiber aramid accounts for 40-90%.
As shown in fig. 1 and 2, the present invention provides a blended yarn of high Jiang Zuran aramid fiber and biomass fiber, which is prepared by the preparation method of any one of the above, and the blended yarn comprises an aramid filament 1 of a core layer, and an aramid staple fiber 2 and a biomass staple fiber 3 which are compositely twisted on the core layer.
In order to further clarify the objects and effects of the present invention, the present invention will be further illustrated with reference to the following specific examples and comparative examples.
In the examples and comparative examples, KH550 was obtained at a purity of 99% or more, a molecular weight of 221.4, CAS number 919-30-2, commercially available from Yinuo chemical, guangzhou, and ethyl orthosilicate was obtained at a purity of 99% or more, a density of 0.934g/cm 3, a molecular weight of 208.3, and a CAS number of 78-10-4, commercially available from Shandong Yuan jin.
Example 1
A preparation method of a high Jiang Zuran aramid fiber and biomass fiber blended yarn comprises the following steps:
S1, soaking the washed para-aramid short fibers in KH550 solution with the concentration of 3%, stirring the solution for 1h at the temperature of 90 ℃ with dimethyl sulfoxide and water with the mass ratio of 1:1, placing the treated para-aramid short fibers in ammonia water ethanol solution containing tetraethoxysilane with the concentration of 3%, the concentration of 2% and the ratio of water to ethanol of 1:1, hydrolyzing the para-aramid short fibers at the temperature of 45 ℃ for 5h, washing the para-aramid short fibers, and drying the para-aramid short fibers at the temperature of 110 ℃ for 20min to obtain aramid/silicon dioxide hybrid fibers;
S2, respectively opening, carding and drawing the para-aramid short fibers and the cotton short fibers pretreated in the step S1 to obtain para-aramid raw strips and cotton short fiber raw strips;
S3, mixing and drawing the para-aramid raw sliver and the cotton short fiber raw sliver to obtain an outer wrapping sliver with the ration of 6.2g/10m, wherein the proportion of the para-aramid to the cotton fiber is 5:5, the outer wrapping sliver enters a drawing device of a spinning frame through a drawing roller, para-aramid filaments are fed at the rear side of a front roller jaw and are converged with the outer wrapping sliver, the drawing multiple of the spinning frame is 30, the speed of the spinning frame is 8500r/min, a Z-twist core spun yarn is formed by utilizing a twisting device, the twist is 520T/m, and the yarn is collected on a bobbin through a spun yarn guiding hook to obtain the blended yarn with the ration of 30.5tex, the core yarn proportion of 35% and the integral fiber aramid proportion of 63%.
The length of the para-aramid short fiber is 37mm, the fineness is 1.5dtex, the length of the cotton short fiber is 25mm, the fineness is 1.65dtex, and the fineness of the para-aramid filament is 110D.
Example 2
This embodiment is substantially the same as example 1 except that the raw materials are different and the biomass staple fiber is flax fiber.
Example 3
This embodiment is substantially the same as example 1, except that the raw material is different, and the biomass short fiber is alginate fiber.
Example 4
This embodiment is substantially the same as example 1 except that the raw materials are different, and the aramid staple fiber and the aramid filament are meta-aramid.
Example 5
The embodiment is basically the same as example 1, except that the raw materials are different, the aramid staple fiber and the aramid filament are meta-aramid, and the biomass staple fiber is flax fiber.
Example 6
This embodiment is substantially the same as example 1 except that the raw materials are different, the aramid staple fiber and the aramid filament are meta-aramid, and the biomass staple fiber is alginate fiber.
Example 7
This embodiment is substantially the same as example 1 except that the raw materials are different, and the aramid staple fiber and the aramid filament are heterocyclic aramid.
Example 8
The embodiment is basically the same as example 1, except that the raw materials are different, the aramid staple fiber and the aramid filament are heterocyclic aramid, and the biomass staple fiber is flax fiber.
Example 9
The embodiment is basically the same as example 1, except that the raw materials are different, the aramid staple fiber and the aramid filament are heterocyclic aramid, and the biomass staple fiber is alginate fiber.
Performance test the blended yarns obtained in examples 1 to 9 were subjected to tests of yarn breakage rate, flame retardant property, strength property and evenness, respectively, in order, and the results are shown in table 1.
Spinning breakage rate in the state of spinning machine blended yarn, continuously recording the total number of ingots and the breakage times of a single spinning machine within 8 hours, calculating the breakage rate, namely the breakage rate (times/thousand ingots) = (total breakage times multiplied by 1000)/(total ingot number multiplied by time (h)), repeating the test for 3 periods (3 days), and taking the average value as a final result.
Flame retardant Property referring to GB/T5454-1997 determination of oxygen index of Combustion Property of textiles, the average value of 5 tests is taken as the result of limiting oxygen index.
Strength properties referring to GB/T3916-2013 (determination of breaking Strength and elongation at break (CRE method) of individual yarn of textile package yarn), breaking Strength and elongation at break are recorded, and the average value of 5 tests is taken as the final result.
The evenness performance refers to GB/T3292.1-2008 section 1 of the method for testing uneven evenness of textile yarn evenness, namely capacitance method, and the average value of 5 tests is taken as the final result of the evenness CV value (variation coefficient).
TABLE 1 Performance test results for the blends of examples 1-9
As shown in table 1:
In the embodiment 6, meta-aramid fiber is used as a core layer and short fibers are wrapped, the meta-aramid fiber is matched with the alginate fiber to perform optimally, the low breakage rate, high flame retardance and excellent evenness are realized, and the high-strength flame retardant fiber has excellent strength performance, specifically, the meta-aramid fiber molecular chain contains a meta-benzene ring structure, has large free volume when heated, can be softened and expanded to form a compact foam carbon layer at 275 ℃, and simultaneously decomposes and releases nonflammable gas to dilute oxygen, and the alginate fiber is decomposed and released to release natural Ca 2+/Mg2+ when the alginate fiber is decomposed at about 300 ℃ and is converted into CaO/MgO metal oxide, so that the carbon layer is more compact by catalyzing the dehydration and carbonization of the meta-aramid fiber, H/OH free radicals in flame can be neutralized, the nano porous aerogel layer generated by combustion can absorb combustible gas, improve heat insulation, and compared with other aramid fiber and biomass fiber, the meta-aramid fiber is matched with the alginate fiber in height, so that the synergistic flame retardance of 'chemical catalysis+physical barrier' is formed, and the high flame retardant effect of 42.1% of limiting oxygen index is realized.
Further, the surface roughness and polarity of the meta-aramid short fiber are improved after the pretreatment of silicon dioxide, the interfacial binding force between the meta-aramid short fiber and the alginate fiber is enhanced, the fiber arrangement is more compact and uniform, and the structural stability of the yarn is improved, so that the breaking strength reaches 612.7cN, the breaking elongation is 20.5%, the evenness CV value is 10.3%, and the comprehensive performance is optimal when the breaking rate is only 5.6 times per thousand ingots.
In order to further illustrate the present invention, a description will be given using the preferred embodiment 6 as the basis of the comparative example.
Comparative example 1
This comparative example is substantially the same as example 6 except that no meta-aramid staple fiber is added, and specifically includes the steps of:
s1, opening, carding and drawing the seaweed short fibers to obtain seaweed short fiber raw strips;
s2, enabling the seaweed short fiber raw sliver to enter a spinning frame drafting device through a traction roller, feeding meta-position aramid filaments at the rear side of a front roller jaw, converging with the outer wrapping sliver, enabling the spinning frame drafting multiple to be 30, enabling the vehicle speed to be 8500r/min, utilizing a twisting device to form Z-twist core spun yarn, enabling the twist to be 520T/m, and collecting the Z-twist core spun yarn on a bobbin through a spun yarn guide hook to obtain a blended yarn with the yarn ration of 30.5tex and the core yarn proportion of 63%.
Wherein the length of the seaweed short fiber is 25mm, the fineness is 1.65dtex, and the fineness of the meta-aramid filament is 110D.
Comparative example 2
The comparative example is basically the same as example 6, except that the meta-aramid short fiber is not modified, and the step S2 specifically comprises the steps of respectively opening, carding and drawing the meta-aramid short fiber and the seaweed short fiber to obtain meta-aramid raw bars and seaweed short fiber raw bars.
Comparative example 3
The comparative example is basically the same as example 6, and the difference is that the spinning frame twist is different, the S3 step is specifically that meta-position aramid fiber raw sliver and seaweed short fiber raw sliver are mixed and drawn to obtain an outer wrapping fiber sliver with the ration of 6.2g/10m, wherein the proportion of the meta-position aramid fiber to the seaweed fiber is 5:5, the outer wrapping fiber sliver enters a spinning frame drafting device through a traction roller, meta-position aramid fiber filaments are fed at the rear side of a front roller jaw and are converged with the outer wrapping fiber sliver, the drafting multiple of the spinning frame is 30, the speed is 8500r/min, a Z-twist covering yarn is formed by utilizing a twisting device, the twist is 400T/m, and the Z-twist covering yarn is collected on a bobbin through a spun yarn guide hook, so that a mixed yarn with the ration of 30.5tex, the core yarn ratio is 35% and the integral fiber aramid fiber ratio is 63% is obtained.
Comparative example 4
The comparative example is basically the same as example 6, and the difference is that the spinning frame twist is different, the S3 step is specifically that meta-aramid fiber raw sliver and seaweed short fiber raw sliver are mixed and drawn to obtain an outer wrapping sliver with the ration of 6.2g/10m, wherein the proportion of the meta-aramid fiber to the seaweed fiber is 5:5, the outer wrapping sliver enters a spinning frame drafting device through a traction roller, meta-aramid fiber filaments are fed at the rear side of a front roller jaw and are converged with the outer wrapping sliver, the drafting multiple of the spinning frame is 30, the speed is 8500r/min, a Z-twist covering yarn is formed by utilizing a twisting device, the twist is 380T/m, and the Z-twist covering yarn is collected on a bobbin through a spun yarn guide hook, so that a mixed yarn with the ration of 30.5tex, the core yarn ratio is 35% and the integral fiber aramid fiber ratio is 63% is obtained.
Comparative example 5
The comparative example is basically the same as example 6, and the difference is that the spinning frame has different twist, the S3 step is specifically that meta-aramid fiber raw sliver and seaweed short fiber raw sliver are mixed and drawn to obtain an outer wrapping sliver with the ration of 6.2g/10m, wherein the proportion of the meta-aramid fiber to the seaweed fiber is 5:5, the outer wrapping sliver enters a drawing device of the spinning frame through a traction roller, meta-aramid fiber filaments are fed at the rear side of a jaw of the front roller and are converged with the outer wrapping sliver, the drawing multiple of the spinning frame is 30, the speed of the spinning frame is 8500r/min, a Z-twist covering yarn is formed by utilizing a twisting device, the twist is 600T/m, and the Z-twist covering yarn is collected on a bobbin through a spun yarn guide hook, so that a mixed yarn with the ration of 30.5tex, the core yarn ratio of 35% and the integral fiber aramid fiber ratio of 63% is obtained.
Comparative example 6
The comparative example is basically the same as example 6, and the difference is that the spinning frame twist is different, the S3 step is specifically that meta-aramid fiber raw sliver and seaweed short fiber raw sliver are mixed and drawn to obtain an outer wrapping sliver with the ration of 6.2g/10m, wherein the proportion of the meta-aramid fiber to the seaweed fiber is 5:5, the outer wrapping sliver enters a spinning frame drafting device through a traction roller, meta-aramid fiber filaments are fed at the rear side of a front roller jaw and are converged with the outer wrapping sliver, the drafting multiple of the spinning frame is 30, the speed is 8500r/min, a Z-twist covering yarn is formed by utilizing a twisting device, the twist is 610T/m, and the yarn is collected on a bobbin through a spun yarn guide hook, so that a mixed yarn with the ration of 30.5tex, the core yarn ratio of 35% and the integral fiber aramid fiber ratio of 63% is obtained.
Performance test the blended yarns obtained in comparative examples 1 to 6 were subjected to the tests of the yarn breakage rate, flame retardant property, strength property and evenness, respectively, in this order, by the same method as in examples 1 to 9, and compared with example 6, and the results are shown in table 2.
TABLE 2 Performance test results for the blends of comparative examples 1-6
As shown in table 2:
As can be seen from the comparison between the example 6 and the comparative example 1, the comparative example 1 has no meta-aramid short fiber added, the outer wrapping layer only contains alginate fiber, the interface binding force between the alginate fiber and the core layer interlayer position aramid filament is weak due to the lack of surface roughness and polarity improvement characteristics after the meta-aramid short fiber is pretreated, the fiber is loose and easy to slip, the breakage rate is suddenly increased to 17.4 times/kilo, meanwhile, the synergistic effect of the meta-aramid short fiber on flame retardance disappears, a dense carbon layer is formed only by the basic flame retardance method of the core layer position aramid filament, the flame retardance is reduced to 21.4%, the yarn structure is loose due to insufficient cohesion of the fiber, the breaking strength is only 328.2cN, the breaking elongation is 11.7%, and the bar-dry CV value is deteriorated to 20.4%.
As can be seen from the comparison between the example 6 and the comparative example 2, the meta-aramid short fiber which is not subjected to modification pretreatment has smooth surface and low polarity, has weak interfacial bonding force with the alginate fiber, is easy to slide and separate between the fibers, and leads to the increase of the breakage rate to 14.2 times/kilo, the poor interfacial bonding leads to the decrease of the structural stability of the yarn, the breaking strength to 494.1cN, the breaking elongation to 14.2 percent and the bar CV value to 16.7 percent, and meanwhile, the surface of the non-modified meta-aramid short fiber lacks nano silicon dioxide particles, the friction coefficient with the alginate fiber cannot be enhanced, the flame retardant synergistic effect is weakened, and the limiting oxygen index is reduced to 34.8 percent.
As is clear from a comparison of example 6 with comparative examples 3 to 4, comparative example 3 is likely to slip between the aramid filaments and the covered fibers at a low twist, which is likely to cause local exposure of the yarn core, the breaking strength is reduced to 552.4cN (loss of 9.8%), while the excessively low twist of comparative example 4 is likely to result in insufficient tightness of the helical arrangement between fibers, weak cohesion, easy slippage of fibers, and deterioration of the bar CV value to 17.3% when the breakage rate is increased to 12.4 times/kilo
As is clear from a comparison of example 6 with comparative examples 5 to 6, comparative example 5 reduced the damaged elongation at break of the crystalline structure of the alginate fiber to 18.1% (loss 11.7%) at higher twist, while the increase in twist temporarily enhanced the cohesion (break strength 574.6 cN), but the concentration of internal stress caused the yarn body stiffness, whereas the excessively high twist of comparative example 6 resulted in concentration of internal stress due to excessive helical twist, the yarn body stiffness and increased the risk of breaking the molecular chain of the fiber easily, resulting in partial microcracking, accelerated oxygen diffusion of the crack upon combustion, and a limit oxygen index reduced to 32.3%.
From the foregoing description it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (10)

1. The preparation method of the high Jiang Zuran aramid fiber and biomass fiber blended yarn is characterized by comprising the following steps of:
s1, soaking an aramid short fiber in a silane coupling agent solution, stirring at a certain temperature, placing the treated aramid short fiber in an ammonia water ethanol solution containing tetraethoxysilane for polycondensation reaction, washing and drying to obtain an aramid/silicon dioxide hybrid fiber;
s2, respectively opening, carding and drawing the aramid short fibers and the biomass short fibers pretreated in the step S1 to obtain aramid raw strips and biomass short fiber raw strips;
s3, mixing the aramid fiber raw sliver and the biomass short fiber raw sliver, enabling the mixed sliver to enter a spinning frame drafting device through a traction roller, feeding the aramid fiber filaments at the rear side of a front roller jaw, converging the aramid fiber filaments with the outer wrapping sliver, forming core spun yarns by utilizing a twisting device, and collecting the core spun yarns by a spun yarn guide hook to obtain mixed yarns.
2. The method for preparing the high Jiang Zuran aramid fiber and biomass fiber blended yarn according to claim 1, wherein in the step S1, the aramid short fiber is one of para-aramid fiber, meta-aramid fiber and heterocyclic aramid fiber, the length of the aramid short fiber is 25-50 mm, and the fineness is 1-2.5 dtex.
3. The method for preparing the high Jiang Zuran aramid fiber and biomass fiber blended yarn according to claim 1, wherein in the step S1, the silane coupling agent is one of KH550, KH560, KH570 and KH792, the concentration is 2-10%, and the solvent is dimethyl sulfoxide and water with a mass ratio of 1:1.
4. The preparation method of the high Jiang Zuran aramid fiber and biomass fiber blended yarn is characterized in that in the step S1, the stirring treatment temperature is 80-100 ℃, the stirring treatment time is 1-1.5 h, the concentration of tetraethoxysilane in a polycondensation reaction tank is 1-5%, the concentration of ammonia water is 1-5%, the ratio of water to ethanol is 1:1, the polycondensation reaction temperature is 25-50 ℃, the time is 2-10 h, the drying temperature is 100-110 ℃, and the drying time is 10-30 min.
5. The preparation method of the high Jiang Zuran aramid fiber and biomass fiber blended yarn according to claim 1 is characterized in that in the step S2, the biomass short fiber is one of cotton fiber, fibrilia, silk fiber, wool fiber, viscose fiber, lyocell fiber, bamboo pulp fiber, alginate fiber, protein fiber, polylactic acid fiber and chitin fiber, and the length of the biomass short fiber is 10-60 mm, and the fineness of the biomass short fiber is 1-10 dtex.
6. The preparation method of the high Jiang Zuran aramid fiber and biomass fiber blended yarn according to claim 1, wherein in the step S3, the ration of the outer wrapping strand after blending is 4-7 g/10m, and the aramid fiber content in the roving is 30-70%.
7. The method for preparing the high Jiang Zuran aramid fiber and biomass fiber blended yarn according to claim 1, wherein in the step S3, the draft multiple of the spinning frame is 20-40, the twisting direction of the core spun yarn is Z twisting, the twisting degree is 400-600T/m, and the vehicle speed is 7000-10000 r/min.
8. The method for preparing the high Jiang Zuran aramid fiber and biomass fiber blended yarn according to claim 1, wherein in the step S3, the aramid fiber filament is one of para-aramid fiber, meta-aramid fiber and heterocyclic aramid fiber, and the fineness of the aramid fiber filament is 50-110D.
9. The method for preparing the blended yarn of the high Jiang Zuran aramid fiber and the biomass fiber according to the claim 1, wherein in the step S3, the yarn weight of the blended yarn is 20-50 tex, the core yarn accounts for 20-50%, and the integral fiber aramid accounts for 40-90%.
10. A high Jiang Zuran aramid fiber and biomass fiber blended yarn, characterized in that the blended yarn is prepared by the preparation method of any one of claims 1-9, and comprises an aramid filament of a core layer, and an aramid staple fiber and a biomass staple fiber which are compositely twisted on the core layer.
CN202510846805.6A 2025-06-24 2025-06-24 High-strength flame-retardant aramid fiber and biomass fiber blended yarn and preparation method thereof Pending CN120844254A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN121137842A (en) * 2025-11-18 2025-12-16 陕西帛宇纺织有限公司 A flame-retardant aramid fiber for fabrics and its preparation method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN121137842A (en) * 2025-11-18 2025-12-16 陕西帛宇纺织有限公司 A flame-retardant aramid fiber for fabrics and its preparation method

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