CN113789594A - Flame-retardant elastic antibacterial composite yarn, wrapping method thereof and flame-retardant antibacterial fabric - Google Patents
Flame-retardant elastic antibacterial composite yarn, wrapping method thereof and flame-retardant antibacterial fabric Download PDFInfo
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- CN113789594A CN113789594A CN202111059549.4A CN202111059549A CN113789594A CN 113789594 A CN113789594 A CN 113789594A CN 202111059549 A CN202111059549 A CN 202111059549A CN 113789594 A CN113789594 A CN 113789594A
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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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- 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
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
- D02G3/328—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic containing elastane
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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
- D02G3/443—Heat-resistant, fireproof or flame-retardant yarns or threads
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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
- D02G3/449—Yarns or threads with antibacterial properties
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
- D03D15/47—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads multicomponent, e.g. blended yarns or threads
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
- D03D15/513—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads heat-resistant or fireproof
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
- D03D15/56—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads elastic
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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
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
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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
- D10B2331/10—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyurethanes
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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
Abstract
The invention discloses flame-retardant elastic antibacterial composite yarn and flame-retardant antibacterial fabric, wherein the flame-retardant elastic antibacterial composite yarn comprises a core wire and an outer winding wire coated on the surface of the core wire; each core wire is formed by twisting and plying a plurality of polyimide fibers, or a plurality of polyimide fibers and flame-retardant yarns, or a plurality of flame-retardant yarns; each external winding wire is formed by twisting and plying elastic fibers or a plurality of elastic fibers and elastic yarns or a plurality of elastic yarns; the coating rate of the outer winding wire coating on the outer surface of the core wire is not less than 99 percent, and the internal elastic fiber can be effectively protected. The flame-retardant antibacterial fabric comprises warps and wefts which are interwoven with each other, wherein all or part of the warps and the wefts are the flame-retardant elastic antibacterial composite yarns. The technical problems of poor flame retardant property, poor elasticity and no antibacterial effect of the fabric in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of yarns, in particular to a flame-retardant elastic antibacterial composite yarn, a wrapping method thereof and a flame-retardant antibacterial fabric.
Background
With the continuous progress and development of society, the social wealth is increasing, meanwhile, the danger of fire disasters is also increasing, and the fireproof textile and the flame retardant property are more and more concerned by people. Clothes generally worn by people are made of polyester materials, the burning point is low, and the polyester can burn quickly after being lighted, is not easy to extinguish, is easy to melt and is attached to skin, and the damage caused by burning of the clothes to the skin of a human body is more serious than the degree caused by skin burning directly exposed outside.
For firefighters, the first scene often faced with a fire is required, and thus the flame retardant properties of the garment are particularly important. The flame-retardant antibacterial fabric used in the fire-fighting clothing in the prior art is poor in flame-retardant performance, poor in elasticity, poor in wearing comfort, strong in stuffy feeling and free of antibacterial effect, and easily causes bacterial breeding.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides the flame-retardant elastic antibacterial composite yarn, the wrapping method thereof and the flame-retardant antibacterial fabric, and aims to solve the technical problems of poor flame retardance, poor elasticity and no antibacterial effect of the fabric in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: a flame-retardant elastic antibacterial composite yarn, characterized by comprising: the core wire is coated with at least one external winding wire on the surface of the core wire;
each core wire is formed by twisting and plying a plurality of polyimide fibers, or formed by twisting and plying a plurality of polyimide fibers and flame-retardant yarns, or formed by twisting and plying a plurality of flame-retardant yarns;
each external winding wire is formed by twisting and plying elastic fibers or a plurality of elastic fibers and elastic yarns or a plurality of elastic yarns;
the flame-retardant yarn and the elastic yarn are respectively composed of: a plurality of polyimide fibers and a plurality of elastic fibers are twisted and plied;
the coating rate of the outer winding wire coated on the outer surface of the core wire is 85-100%.
In a preferred embodiment of the invention, 1-10 external winding wires are used for coating the outer peripheral surface of the core wire.
In a preferred embodiment of the invention, the wrapping rate of the outer winding wire wrapping the outer surface of the core wire is not less than 99%.
In a preferred embodiment of the invention, the polyimide fiber is formed by twisting and cohering a plurality of polyimide short fibers; or a polyimide filament; or a composite fiber of polyimide short fibers and flame-retardant fibers; the flame-retardant fiber is one or more of aramid short fiber and polyester fiber.
In a preferred embodiment of the present invention,
the elastic fiber is spandex fiber; or
The elastic fiber is polyester fiber SSY fiber; or
The elastic fiber is polyester fiber PBT fiber.
In a preferred embodiment of the present invention, the ratio of the number of the core wire to the number of the outer winding wire is 1: 3-5.
In a preferred embodiment of the present invention, the reactive monomer containing functional groups of phosphorus, sulfur or halogen is bonded to the macromolecular chain of the elastic fiber to realize the flame retardant modification of the elastic fiber.
The wrapping method based on the flame-retardant elastic composite yarn is characterized by comprising the following steps of:
wrapping a plurality of outer winding wires on the outer surface of the core wire once, or,
wrapping the plurality of outer winding wires on the outer surface of the core wire for two times, or,
......
wrapping the outer surface of the core wire with a plurality of outer winding wires for N times;
n is a natural number more than or equal to 1, and N is not more than 10.
In a preferred embodiment of the present invention, when N is 2 or more, the fineness of the outer winding wire of N times of wrapping is 1 or more.
In a preferred embodiment of the invention, the fineness of the core wire is 15-25D, and the fineness of the external winding wire is not less than 20D.
In a preferred embodiment of the invention, the twist of the flame-retardant elastic composite yarn is 500-.
The secondary wrapping method based on the flame-retardant elastic composite yarn comprises the following steps:
s1, wrapping a plurality of outer wrapping wires on the outer surface of the core wire for the first time, and ensuring that the wrapping rate of the outer wrapping wires and the core wire which are wrapped for the first time is 85% -90%;
s2, wrapping a plurality of outer winding wires on the outer surface of the core wire for the second time, wherein the outer winding wires for the second time are embedded in gaps between adjacent outer winding wires in S1 or covered on the surface of the outer winding wires in S1, so that the winding density of the outer winding wires on the surface of the core wire is higher, the wrapping rate of the outer winding wires and the core wire for the second time is not less than 99%, and the wrapping rate is not lower than 90% when the composite yarn after the second time of wrapping is stretched by 30% under the action of external force.
A flame retardant, antimicrobial fabric comprising: the flame-retardant elastic antibacterial composite yarn comprises warps and wefts which are interwoven with each other, wherein all or part of the warps and the wefts are the flame-retardant elastic antibacterial composite yarn.
The invention solves the defects in the background technology, and has the following beneficial effects:
(1) according to the invention, the outer winding wires are coated on the outer surface of the core wire, three outer winding wires are selected, the core wire is made of the flame-retardant material, the core wire is made of the elastic material, an elastic and flame-retardant composite yarn structure is formed, the coating rate of the outer winding wires coated on the outer surface of the core wire reaches 99%, the core wire is completely coated, the inner core wire is effectively protected, and the composite yarn shows a high-temperature-resistant flame-retardant effect on a fire scene or a battlefield.
(2) The polyimide fiber provided by the invention has good and long-term antibacterial performance, meets the requirements of long wearing time and severe working environment of the firefighter uniform, solves the problem of bacterial growth caused by long-term wearing, realizes an antibacterial effect on the firefighter uniform, better protects the skin, and improves the wearing comfort level.
(3) The invention adopts a plurality of external winding wires to wrap the external surface of the core wire for N times, wherein N is not more than 10, and the fineness of the external winding wire of the next wrapping is ensured to be thinner, the gap filling possibility of the gap generated by the external winding wire of the previous wrapping after the yarn is stretched and elongated is increased, a space is provided for the thinner yarn of the next wrapping to enter the gap with the same size, the gap filling rate of the next wrapping is improved, and the increase of the gap filling rate can increase the dynamic wrapping rate of the yarn after the yarn is stretched and elongated.
(4) According to the invention, the outer winding wire and the core wire are treated by adopting a secondary winding method, so that the outer winding wire of the secondary winding is embedded in a gap between adjacent outer winding wires in the primary winding or covers the surface of the outer winding wire of the primary winding, the winding density of the outer winding wire on the surface of the core wire is higher, when the composite yarn of the secondary winding is extended by 30% under the action of external force, the coating rate is not lower than 90%, the higher winding rate of the composite yarn is further improved, and the flame retardant and antibacterial effects of the composite yarn are further improved.
(5) The outer winding wire is a polyimide fiber material, and the polyimide fiber material contains imide ring (-CO-NH-CO-) on the main chain, has excellent high temperature resistance, has a decomposition temperature of 580 ℃, and can be used for a long time at 300 ℃. The outer surface of the core wire is coated with the outer winding wire, the coated core wire is not easy to burn, a first ignition point can appear on the surface of the outer winding wire under the condition of high temperature or fire, and the polyimide fiber material is difficult to ignite because of high ignition point; after the polyimide fiber is ignited, the continuous burning time is short, the phenomenon of melting and dripping is avoided, and the harm to human bodies is reduced.
(6) The polyimide fiber has high elastic modulus, so that the fabric made of the polyimide fiber is relatively stiff, the elastic fiber with high elasticity is used as a core, the polyimide fiber is coated on the elastic fiber to form the elastic yarn with high elasticity, the softness of the fabric is improved, and the made textile has good dimensional stability, is not easy to wrinkle in the process of being taken and is relatively wear-resistant.
(7) The elastic fiber in the invention is spandex fiber or polyester fiber SSY fiber or polyester fiber PBT fiber, the melting points of which are respectively 60-70 ℃, 160-.
(8) According to the invention, the reaction monomer containing the functional group of phosphorus, sulfur or halogen is bonded on the macromolecular chain of the elastic fiber, so that the flame-retardant modification of the elastic fiber is realized, the core wire and the outer winding wire form a flame-retardant synergistic effect, and the flame-retardant effect of the composite yarn is further enhanced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;
FIG. 1 is a perspective view of a flame retardant elastic antimicrobial composite yarn according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a secondary composite yarn wrapping method according to a first embodiment of the present invention;
in the figure: 1. a first external winding wire; 2. a second outer winding wire; 3. a third external winding wire; 4. a core wire.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present 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 specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The invention provides a schematic three-dimensional structure diagram of a flame-retardant elastic antibacterial composite yarn. The flame-retardant elastic antibacterial composite yarn comprises: the core wire 4 is at least one external winding wire coated on the surface of the core wire 4. The outer winding is coated on the surface of the core wire 4 and is dyed into a preset color in advance. The fineness of the core wire 4 is 15-25D, and the fineness of the outer winding wire is not less than 20D. The ratio of the number of the core wire 4 to the number of the external winding wire is 1: 10. the twist of the flame-retardant elastic antibacterial composite yarn is 500-. The coating rate of the outer winding wire coated on the outer surface of the core wire 4 is 85-100%.
Each core wire 4 is formed by twisting and plying a polyimide fiber, a plurality of polyimide fibers and a flame-retardant yarn, or a plurality of flame-retardant yarns. The polyimide fiber is formed by twisting and cohesion of a plurality of polyimide short fibers; or a polyimide filament; or a composite fiber of polyimide short fibers and flame-retardant fibers; the flame-retardant fiber is one or more of aramid short fiber and polyester fiber.
The outer winding wire is a polyimide fiber material, and the polyimide fiber material contains imide ring (-CO-NH-CO-) on the main chain, has excellent high temperature resistance, has a decomposition temperature of 580 ℃, and can be used for a long time at 300 ℃. The outer surface of the core wire 4 is coated with the outer winding wire, the coated core wire 4 is not easy to burn, a first ignition point can appear on the surface of the outer winding wire under the condition of high temperature or fire, and the polyimide fiber material is difficult to ignite because of high ignition point; after the polyimide fiber is ignited, the continuous burning time is short, the phenomenon of melting and dripping is avoided, and the harm to human bodies is reduced.
Each external winding wire is formed by twisting and plying elastic fibers or a plurality of elastic fibers and elastic yarns or a plurality of elastic yarns. The flame-retardant yarn and the elastic yarn are respectively composed of: a plurality of polyimide fibers and a plurality of elastic fibers are twisted and plied.
The polyimide fiber has high elastic modulus, so that the fabric made of the polyimide fiber is relatively stiff, the elastic fiber with high elasticity is used as a core, the polyimide fiber is coated on the elastic fiber to form the elastic yarn with high elasticity, the softness of the fabric is improved, and the made textile has good dimensional stability, is not easy to wrinkle in the process of being taken and is relatively wear-resistant.
The invention aims to solve the problem of poor elastic effect of the flame-retardant fabric in the prior art, and materials in the prior art are selected. In the prior art, terylene is generally selected as a material in the flame-retardant fabric, the strength of short fiber of the terylene is 2.6-5.7 cN/dtex, and the strength of high-strength fiber is 5.6-8.0 cN/dtex. However, the flame-retardant fabric is suitable for firefighter uniforms, and needs to have certain strong elasticity so as to ensure easy movement during operation and certain breathability. Thus, polyester is not suitable.
The elastic fiber provided in the application is spandex fiber; or the elastic fiber is polyester fiber SSY fiber; or the elastic fiber is polyester fiber PBT fiber. The spandex fiber is short for polyurethane fiber and is elastic fiber. The spandex fiber has a flexible long chain segment and a rigid short chain segment, the flexible long chain segment is easy to deform, so that the fiber has stretchability, the rigid short chain segment is not easy to deform, and transverse slippage is prevented, so that the fiber has resilience. Spandex fibers have an elongation of 500-800% and a retraction rate of over 99% at 50% elongation. The melting point of the spandex fiber is 60-70 ℃. The polyester fiber SSY elastic fiber is a PET parallel composite spinning fiber, a bi-component polyester fiber, and forms a permanent elastic crimping structure by utilizing the different shrinkage of the bi-component. The melting point of the polyester fiber SSY fiber is 160-170 ℃. The polyester fiber PBT fiber is a polybutylene terephthalate fiber, which is a short-term polyester fiber, is prepared by melt spinning of a linear polymer obtained by esterification and polycondensation of high-Purity Terephthalic Acid (PTA) or dimethyl terephthalate (DMT) and 1, 4-butanediol, and belongs to one of polyester fibers. The melting point of the PBT fiber of the polyester fiber is 220-230 ℃.
The three fibers have excellent elasticity, and corresponding elastic fibers with different melting points are selected to be compounded with the polyimide fibers according to different requirements, so that the flame-retardant elastic antibacterial composite yarn with higher cost performance is obtained. When the composite fiber is used, for the composite fiber with higher performance requirement, the polyester fiber SSY fiber or the polyester fiber PBT fiber is selected; selecting spandex fiber for the composite fiber with lower cost.
It should be noted that the structures of the external winding wire and the core wire are divided into four structures: single fiber, multiple fiber twists, fiber and yarn twists, and yarn twists. In the practical use process, as the single fiber has larger fineness, the thickness of the fiber is smaller, and the accuracy and difficulty of wrapping the single polyimide fiber on the core wire are higher, the fineness of the core wire 4 is selected to be 15-25D, and the fineness of the outer winding wire is not less than 20D, so that the wrapping technology has lower difficulty and lower cost on the premise of ensuring higher flame retardant property.
Because the flame-retardant fabric is suitable for firefighter uniforms, the fabric prepared from the fibers with better elasticity can ensure better air permeability, and the elasticity of the elastic fibers is as follows: the spandex fiber is larger than the polyester fiber SSY fiber and larger than the polyester fiber PBT fiber, so that the flame-retardant fabric prepared from the spandex fiber has the best elastic effect and the best ventilation effect.
It should be noted that, although the coating rate of the composite yarn of the present invention is 85% to 100%. The poorer the surface permeability under such conditions of high coverage and no elongation deformation of the composite. However, in the present application, the core thread 4 has high elasticity, and the composite yarn is elongated during the movement, so that the air permeability is further improved. Therefore, the air permeability of the composite yarn is determined based on the elasticity of the elastic fiber.
The present embodiment provides a wrapping method based on the above flame-retardant elastic composite yarn, including:
wrapping a plurality of outer winding wires on the outer surface of the core wire once, or,
wrapping the plurality of outer winding wires on the outer surface of the core wire for two times, or,
......
wrapping the outer surface of the core wire with a plurality of outer winding wires for N times;
n is a natural number more than or equal to 1, and N is not more than 10.
And when N is more than or equal to 2, the fineness of the outer winding wire of N times of wrapping is more than or equal to the fineness of the outer winding wire of N-1 times of wrapping. The multi-wrapping method ensures that the fineness of the outer winding wire wrapped at the next time is thinner, increases the seam filling possibility of the gap generated by the outer winding wire wrapped at the previous time after the yarn is stretched and elongated, provides space for the thinner yarn at the next time to enter the gap with the same size, and improves the seam filling rate at the next time. In addition, this increase in the rate of filling can increase the dynamic wrap rate of the yarn after tensile elongation.
The invention also provides a flame-retardant antibacterial fabric, which comprises: the warps and the wefts are interwoven with each other, and all or part of the warps and the wefts are the flame-retardant elastic antibacterial composite yarn. The outer winding wire is dyed orange yellow in advance before being wrapped on the surface of the core wire 4, and secondary dyeing is not needed when the outer winding wire is woven into the fabric. The firefighter uniform made of the fabric has good flame retardant and elastic properties and also has good and long-term antibacterial property, and for the firefighter uniform which is often subjected to severe environment, the firefighter uniform can have excellent high-temperature resistant flame retardant effect on a fire scene, and the excellent antibacterial property also ensures the wearing comfort of firefighters or soldiers and better protection on skin.
Example one
In this embodiment, based on the above wrapping method, the ratio of the number of the core wire to the number of the outer winding wire in this embodiment is preferably 1: 3-5. The present embodiment provides coating the outer circumferential surface of the core wire 4 with three outer windings. As shown in FIG. 1, the surface of the core wire 4 is densely covered by the first, second and third outer winds 1, 2 and 3, and the covering rate of all the outer winds on the outer surface of the core wire 4 is not less than 99%. The fineness of the core wire 4 was 20D and the fineness of the outer wrap was 25D. The twist of the resulting composite yarn was 2000 twists/m.
As shown in fig. 2, the secondary wrapping method based on the composite yarn comprises the following steps:
s1, wrapping a plurality of outer wrapping wires on the outer surface of the core wire 4 for the first time, and ensuring that the wrapping rate of the outer wrapping wires and the core wire 4 which are wrapped for the first time is 85% -90%;
s2, wrapping a plurality of outer winding wires on the outer surface of the core wire 4 for the second time, wherein the outer winding wires for the second time are embedded in gaps between adjacent outer winding wires in S1 or covered on the surface of the outer winding wires in S1, so that the winding density of the outer winding wires on the surface of the core wire 4 is higher, the wrapping rate of the outer winding wires and the core wire 4 for the second time is not less than 99%, and the wrapping rate is not less than 90% when the composite yarn after the second time is stretched by 30% under the action of external force.
In S1, after the core wire 4 is tensioned, the elongation of the core wire 4 is maintained at about 10%, the first outer cord 1 and the second outer cord 2 are simultaneously wrapped around the outer surface of the core wire 4, and after the core wire 4 is loosened and relaxed, the core wire 4 is contracted, so that the outer cords wrapped for the first time and the core wire 4 are covered at 85% to 90%. In S2, after the core wire 4 is tensioned, the elongation of the core wire 4 is maintained at about 10%, the third outer winding wire 3 is wrapped in the gap between the adjacent outer winding wires in S1 or covered on the surface of the outer winding wire in S1, the coverage of the surface of the core wire 4 after the second wrapping is ensured to be not less than 94% in the tensioned state, and after the core wire 4 is relaxed and relaxed, the core wire 4 is contracted, and the coverage of the outer winding wire and the core wire 4 after the second wrapping is ensured to be not less than 99%. When the composite yarn is stretched by 30% under the action of external force, the coating rate is not lower than 90%, the higher wrapping rate of the composite yarn is further improved, and the flame retardant and antibacterial effects of the composite yarn are further improved.
The different coating rates of the composite fiber of the embodiment can be used for testing the flame retardant performance. As shown in table 1, the samples 1 to 7 have flame retardant properties, and the samples 1 to 7 are respectively an outer winding, a core wire 4, a composite yarn with a coating rate of 30% to 50%, a composite yarn with a coating rate of 50% to 70%, a composite yarn with a coating rate of 70% to 90%, a composite yarn with a coating rate of 90% to 99%, and a composite yarn with a coating rate of 99% to 100%. Wherein, compound yarn is the outer surface structure of kinking cladding 4 heart yearns outward, and the kinking is the polyimide yarn outward, and heart yearn 4 is the spandex yarn. The fineness of the core wire 4 was 20D and the fineness of the outer wrap was 25D.
The method for testing the flame retardant property of the composite fiber in the embodiment comprises the following steps: the test is carried out under the atmospheric conditions of the temperature of 200 ℃ and the relative humidity of 50 percent, and after the igniter is ignited for preheating, the distance from the top end of the igniter to the tip end of the flame is ensured to be 45 mm; clamping the connected sample to be tested by using a yarn clamp holder, adding 3 twists to the sample to be tested in the direction opposite to the twist direction of the yarn, and clamping the sample clamped with the sample to be tested in a combustion test box to ensure that the distance between the top end of an igniter and the surface of the sample to be tested is 45 mm; controlling an igniter to ignite the sample to be tested by using a timing device, controlling the ignition time to be 8s, controlling the time from the ignition to the time when the sample to be tested is taken out from a combustion test box to be 1min, and measuring the aftercombustion time; and (4) taking a sample to be tested of the same sample, repeatedly testing for 50 times, and averaging the results of the test of the afterflame time. The results of the flame retardant performance tests for samples 1-7 are shown below:
| sample numbering | Components | Number of root/root | Duration of continuous combustion/s |
| |
External winding wire | 50 | 0.65 |
| |
Core wire | 50 | 6.21 |
| |
Composite yarn (cladding rate 30% -50%) | 50 | 3.16 |
| Sample No. 4 | Composite yarn (coating rate 50% -70%) | 50 | 2.63 |
| Sample No. 5 | Composite yarn (coating rate 70% -90%) | 50 | 1.90 |
| Sample No. 6 | Composite yarn (cladding rate 90% -99%) | 50 | 1.02 |
| Sample 7 | Composite yarn (cladding rate 99% -100%) | 50 | 0.67 |
The above samples 1, 2 are different from the samples 3 to 7 in that: the single external winding wire and the single core wire 4 are respectively used for the sample 1 and the sample 2, so that the after-burning time is obviously shortened after the external winding wire in the embodiment is ignited; in samples 3-7, the flame retardant property of the composite yarn is related to the coating rate of the surface external winding, the coating rate of the sample is high, and the flame retardant property of the sample is good if the afterflame time is short. Since the coating rate of the composite yarn of sample 7 reached more than 99%, the afterflame time was substantially equal to that of the single outerwire of sample 1. Therefore, when the coating rate of the outer winding wire coated on the outer surface of the core wire 4 is not less than 99%, the flame retardant property of the composite yarn is not greatly different from that of the pure flame retardant yarn.
In addition, the antibacterial performance of the composite yarn in the embodiment is related to the coating rate of the outer winding on the surface of the composite yarn, the coating rate of the sample is high, the larger the density of the outer winding is, the larger the contact area of the outer winding and a human body is, and the better the antibacterial effect is.
Example two
In this example, the flame retardant performance of the core wire 4 in the first example was modified. The flame-retardant modification of the elastic fiber is realized by bonding a reaction monomer containing a functional group of phosphorus, sulfur or halogen on an elastic fiber macromolecular chain. The samples 3-7 from example one were tested against control 3-7 with the other conditions unchanged. The results are given in the following table:
| sample numbering | Components | Number of root/root | Duration of continuous combustion/s |
| |
Composite yarn (cladding rate 30%～50％) | 50 | 2.93 |
| |
Composite yarn (coating rate 50% -70%) | 50 | 2.38 |
| Control 5 | Composite yarn (coating rate 70% -90%) | 50 | 1.66 |
| Control 6 | Composite yarn (cladding rate 90% -99%) | 50 | 0.76 |
| Control 7 | Composite yarn (cladding rate 99% -100%) | 50 | 0.66 |
Controls 3-7 correspond one-to-one to samples 3-7 in this example. It is obvious from the table above and the table of the first embodiment that the flame retardant property of the composite yarn is related to the flame retardant property of the core wire 4, and the flame retardant modification of the core wire 4 enables the core wire 4 and the outer winding wire to form a flame retardant synergistic effect, thereby further enhancing the flame retardant effect of the composite yarn. In the first and second examples, control 7 is the best mode.
In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A flame-retardant elastic antibacterial composite yarn, characterized by comprising: the core wire is coated with at least one external winding wire on the surface of the core wire;
each core wire is formed by twisting and plying a plurality of polyimide fibers, or formed by twisting and plying a plurality of polyimide fibers and flame-retardant yarns, or formed by twisting and plying a plurality of flame-retardant yarns;
each external winding wire is formed by twisting and plying elastic fibers or a plurality of elastic fibers and elastic yarns or a plurality of elastic yarns;
the flame-retardant yarn and the elastic yarn are respectively composed of: a plurality of polyimide fibers and a plurality of elastic fibers are twisted and plied;
the coating rate of the outer winding wire coated on the outer surface of the core wire is 85-100%.
2. The flame-retardant elastic antibacterial composite yarn according to claim 1, characterized in that: and 1-10 external winding wires are used for coating the peripheral surface of the core wire.
3. The flame-retardant elastic antibacterial composite yarn according to claim 2, characterized in that: the wrapping rate of the outer winding wire wrapping the outer surface of the core wire is not less than 99%.
4. The flame-retardant elastic antibacterial composite yarn according to claim 1, characterized in that: the polyimide fiber is formed by twisting and cohesion of a plurality of polyimide short fibers; or a polyimide filament; or a composite fiber of polyimide short fibers and flame-retardant fibers; the flame-retardant fiber is one or more of aramid short fiber and polyester fiber.
5. The flame-retardant elastic antibacterial composite yarn according to claim 1, characterized in that:
the elastic fiber is spandex fiber; or
The elastic fiber is polyester fiber SSY fiber; or
The elastic fiber is polyester fiber PBT fiber.
6. The flame-retardant elastic antibacterial composite yarn according to claim 1, characterized in that: the ratio of the number of the core wire to the number of the outer winding wire is 1: 3-5.
7. The flame-retardant elastic antibacterial composite yarn according to claim 1, characterized in that: the flame-retardant modification of the elastic fiber is realized by bonding a reaction monomer containing a functional group of phosphorus, sulfur or halogen on the macromolecular chain of the elastic fiber.
8. A wrapping method based on the flame retardant elastic composite yarn according to any one of claims 1 to 7, characterized by comprising:
wrapping a plurality of outer winding wires on the outer surface of the core wire once, or,
wrapping the plurality of outer winding wires on the outer surface of the core wire for two times, or,
......
wrapping the outer surface of the core wire with a plurality of outer winding wires for N times;
n is a natural number more than or equal to 1, and N is not more than 10.
9. A wrapping method according to claim 8, characterized in that: and when the N is more than or equal to 2, the fineness of the outer winding wire of the N times of wrapping is more than or equal to the fineness of the outer winding wire of the N-1 times of wrapping.
10. The flame-retardant antibacterial fabric is characterized by comprising: warp and weft which are interwoven with each other, and all or part of the warp and the weft is the flame-retardant elastic antibacterial composite yarn according to claim 1.
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