CN111424353A - Flame-retardant sewing thread and production process thereof - Google Patents
Flame-retardant sewing thread and production process thereof Download PDFInfo
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- CN111424353A CN111424353A CN202010111842.XA CN202010111842A CN111424353A CN 111424353 A CN111424353 A CN 111424353A CN 202010111842 A CN202010111842 A CN 202010111842A CN 111424353 A CN111424353 A CN 111424353A
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 90
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 238000009958 sewing Methods 0.000 title claims abstract description 86
- 238000004519 manufacturing process Methods 0.000 title abstract description 18
- 239000000835 fiber Substances 0.000 claims abstract description 91
- 229920000728 polyester Polymers 0.000 claims abstract description 20
- 229920006231 aramid fiber Polymers 0.000 claims abstract description 17
- 239000004677 Nylon Substances 0.000 claims abstract description 11
- 229920001778 nylon Polymers 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- WCPAKWJPBJAGKN-UHFFFAOYSA-N oxadiazole Chemical compound C1=CON=N1 WCPAKWJPBJAGKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 125000003118 aryl group Chemical group 0.000 claims abstract description 3
- 238000010025 steaming Methods 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 21
- 238000004513 sizing Methods 0.000 claims description 14
- 239000004760 aramid Substances 0.000 claims description 13
- 229920003235 aromatic polyamide Polymers 0.000 claims description 13
- 229920002292 Nylon 6 Polymers 0.000 claims description 10
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 12
- 239000004753 textile Substances 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 description 6
- 238000009987 spinning Methods 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 238000009960 carding Methods 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 4
- 239000010985 leather Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920002821 Modacrylic Polymers 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 241000168254 Siro Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- BVTBRVFYZUCAKH-UHFFFAOYSA-L disodium selenite Chemical compound [Na+].[Na+].[O-][Se]([O-])=O BVTBRVFYZUCAKH-UHFFFAOYSA-L 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
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- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
- 229960001471 sodium selenite Drugs 0.000 description 1
- 235000015921 sodium selenite Nutrition 0.000 description 1
- 239000011781 sodium selenite Substances 0.000 description 1
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Classifications
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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
- D02G3/46—Sewing-cottons or the like
-
- 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
-
- 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
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
-
- 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
-
- 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
-
- 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]
-
- 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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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention relates to the technical field of textile production, in particular to a flame-retardant sewing thread and a production process thereof. The flame-retardant sewing thread comprises the following raw materials in percentage by mass: 50-62% of aramid fiber, 16-30% of aromatic oxadiazole fiber and the balance of nylon short fiber or polyester short fiber. The flame-retardant sewing thread has good flame-retardant effect, high strength, proper price and simple production and easy operation, and can meet the requirement of high-speed sewing without breaking ends.
Description
Technical Field
The invention relates to the technical field of textile production, in particular to a flame-retardant sewing thread and a production process thereof.
Background
In the industries of military police clothing, coal, electric power, petrochemical industry and the like, the flame-retardant protective clothing is used as an isolation layer to protect the safety and health of a human body, the flame-retardant sewing thread plays roles of sewing and edge locking in the flame-retardant protective clothing, if the flame-retardant effect of the flame-retardant sewing thread is poor, the flame-retardant protective clothing has the problems of seam separation, damage and the like when encountering fire, and therefore the flame-retardant effect of the flame-retardant sewing thread is not ignored.
The invention patent of application number 201711433229.4 discloses a production process of a flame-retardant sewing thread, which is characterized in that siro compact spinning is adopted to spin aramid 1313 fiber single yarns, the aramid 1313 fibers are subjected to fiber steaming treatment firstly, then yarns are spun, and the yarns are stranded and steamed to prepare the sewing thread, and a humidifying and moisturizing process is adopted in each process to improve the yarn forming performance of the flame-retardant aramid sewing thread. Although the aramid 1313 sewing thread has good flame retardant property, there are some problems: the glass transition temperature is high, dyeing is not easy, the price of aramid 1313 fiber is high, and the sewing thread strength is not as good as that of a high-strength polyester filament sewing thread.
The invention patent of application No. 201510880818.1 discloses a flame-retardant anti-dripping high-strength sewing thread, which takes fine-denier high-strength polyester filament with the fineness less than 300D as a core, and is externally wrapped with flame-retardant anti-dripping fiber, wherein the flame-retardant anti-dripping fiber comprises modacrylic, aramid 1313, aramid 1414 or flame-retardant viscose. The high-strength sewing thread can effectively reduce the cost, has flame retardance and high strength, but has a complex process, needs to adopt flame-retardant fiber strands to coat polyester filaments, needs to well control the proportion of the sheath and the core, and can achieve the smoothness and the strength required by the sewing thread; in addition, the core-spun yarn technology is difficult to coat the filament yarn in the middle of the yarn body at present, and obvious nonuniformity exists on the surface of the yarn body, so that the sewing efficiency is influenced; most importantly, the elongation at break of the yarn is 16-18% and the elongation cannot meet the requirement that the flame retardance of aramid fiber sewing threads is more than 20%.
The invention patent of application number 201810809411.3 discloses a high-strength flame-retardant leather sewing thread, which is formed by using bamboo fiber and cotton fiber blended yarn as core yarn after being soaked and dried by sodium selenite; aramid fiber, ceramic fiber and polyacrylonitrile-based carbon fiber blended outer layer yarn; and then the outer layer yarn is completely wrapped with the core yarn to obtain the high-strength flame-retardant sewing thread which is used for sewing leather. The sewing thread preparation process is too complex and is not easy to implement; the breaking elongation of the sewing thread is only less than 1%, and the sufficient breaking elongation is a necessary condition for ensuring the high-speed sewing without breaking (the general requirement of the flame-retardant aramid fiber sewing thread is higher than 17%). The sewing thread is difficult to be used for sewing requirements of work clothes requiring high-speed sewing.
Utility model patent application No. 201720514614.0 discloses a sewing thread with fire prevention function, obtains fire-retardant sewing thread through fire-retardant coating, but fire-retardant effect is difficult to last.
Therefore, it is necessary to develop a flame-retardant sewing thread which is suitable for flame-retardant protective clothing, has intrinsic flame retardance and high strength, meets the requirement of elongation at break, is proper in price and is easy to prepare.
Disclosure of Invention
The flame-retardant sewing thread has good flame-retardant effect and high strength, can meet the requirement of high-speed sewing without breaking ends, is suitable in price, is easy to prepare by the production process provided by the application, and well solves the problems in the prior art.
On one hand, the technical scheme adopted by the invention for solving the technical problems is as follows:
The flame-retardant sewing thread comprises the following raw materials in percentage by mass: 50-62% of aramid fiber, 16-30% of aromatic oxadiazole fiber and the balance of nylon short fiber or polyester short fiber.
Preferably, the single fiber strength of the nylon short fibers or the polyester short fibers is not lower than 5.0 cN/dtex.
Preferably, the aramid fiber is aramid fiber 1313; the nylon short fibers are nylon 6 short fibers or nylon 66 short fibers.
Preferably, the fiber length in each raw material is 51mm, and the fineness is 1.0-3.0 dt.
Preferably, the breaking strength of the polyester staple fibers is 5.4-6.0 cN/dtex, and the elongation at break is 28-32%;
The nylon 66 short fiber has the breaking strength of 5.4-6.0 cN/dtex and the elongation at break of 28-32%;
The nylon 6 short fiber has a breaking strength of 6.0-7.0 cN/dtex and an elongation at break of 35-39%.
On the other hand, the technical scheme adopted by the invention for solving the technical problems is as follows:
A production process of a flame-retardant sewing thread comprises the following steps:
(1) Mixing the components in a certain sequence according to the mass percentage to spin 40s blended yarn;
(2) Twisting the 40s blended yarn prepared in the step (1) to form spun yarn cop;
(3) Steaming and shaping the spun yarn bobbin yarn prepared in the step (2), and then winding, doubling and doubling to form 40s/2 folded yarn;
(4) Steaming and sizing the 40s/2 folded yarn prepared in the step (3), and then doubling and doubling to form a 40s/3 double-twisted folded yarn;
(5) And (4) steaming and sizing the 40s/3 double-twisted plied yarn prepared in the step (4) to prepare the flame-retardant sewing thread.
Preferably, the mixing sequence of the components in the step (1) is as follows: the aramid fiber and the polyoxadiazole fiber are coiled and mixed into raw strips, nylon short fiber or polyester short fiber is separately made into raw strips, and then three-way combination is carried out in the drawing process to mix the three fibers.
Preferably, the twisting coefficient of the 40s blended yarn in the step (2) is 300-350;
In the step (3), the stranding and twisting coefficient is 400-550;
The stranding and twisting coefficient in the step (4) is 430.
Preferably, the yarn steaming and setting parameters of the spun bobbin yarn in the step (3) are as follows: the temperature is 60-95 ℃, and the time is 15-40 min;
In the step (4), the yarn steaming and setting parameters of 40s/2 folded yarns are as follows: the temperature is 90 ℃, and the time is 40 min;
In the step (5), the yarn steaming and setting parameters of the 40s/3 double-twisted plied yarn are as follows: the temperature is 60-85 ℃, and the time is 20-80 min.
Preferably, the strength of the 40s/2 strand is not lower than 700cN, and the elongation at break is not lower than 17%;
The strength of the 40s/3 double-twisted yarn is not less than 1200cN, and the elongation at break is not less than 20%.
The invention has the beneficial effects that:
1. The aramid fiber, the polyaryl oxadiazole fiber, the nylon short fiber or the polyester short fiber adopted by the flame-retardant sewing thread have good cooperative flame-retardant effect. The requirements of flame retardance of the flame-retardant sewing thread and flame retardance and high temperature resistance without obvious change of appearance at 260 ℃ are met; the strength required by high-speed sewing of the sewing thread is also met; meanwhile, the nylon short fibers or the polyester short fibers are added, so that the production cost is effectively reduced.
2. The production process of the flame-retardant sewing thread is simple to operate, and the parameters in all the steps are set, so that the high yarn breaking elongation is obtained, and the requirement of continuous end breakage in the high-speed sewing process is met.
Drawings
FIG. 1 is a diagram showing the flame-retardant effect of the flame-retardant sewing thread of example 1 of the present invention when the flame-retardant sewing thread is sewn into a flame-retardant fabric, after 12 seconds of exposure to fire;
FIG. 2 is a graph showing the flame-retardant effect of the flame-retardant sewing thread of example 2 of the present invention when exposed to fire for 12 seconds after sewing the flame-retardant fabric;
FIG. 3 is a graph showing the flame-retardant effect of the flame-retardant sewing thread of example 3 of the present invention when the flame-retardant sewing thread sews the flame-retardant fabric and encounters fire for 12 seconds;
FIG. 4 is a graph showing the flame retardant effect of the flame retardant sewing thread of example 4 of the present invention when the flame retardant sewing thread is sewn into a flame retardant fabric, after 12 seconds of exposure to fire;
FIG. 5 is a graph showing the flame retardant effect of the flame retardant sewing thread of example 5 of the present invention when the flame retardant sewing thread is sewn into a flame retardant fabric, after 12 seconds of exposure to fire.
Detailed Description
In order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments.
Example 1
The flame-retardant sewing thread comprises the following raw materials in percentage by mass:
53% of aramid 1313, 24% of polyaryl oxadiazole fiber and 23% of high-strength polyester staple fiber;
The length of each fiber is 51mm, and the fineness is 1.0-3.0 dt; the breaking strength of the polyester staple fiber is 5.4-6.0 cN/dtex, and the elongation at break is 28-32%.
The production process of the flame-retardant sewing thread comprises the following steps:
(1) According to the mass percentage, aramid fiber and polyoxadiazole fiber are mixed into raw slivers in a disc mode, high-strength polyester staple fiber is independently made into the raw slivers, then three-way combination is carried out in a drawing process, the three types of fiber are mixed, and the mixed fiber is spun into 40s blended yarn through the technological processes of blowing, carding, drawing, roving and spinning;
(2) Twisting the 40s blended yarn prepared in the step (1) with a single yarn twist coefficient of 330 to form spun yarn cop;
(3) Steaming and shaping the spun yarn bobbin yarn prepared in the step (2), and then winding, doubling and doubling to form 40s/2 folded yarn; wherein, the yarn steaming and setting parameters are as follows: the temperature is 85 ℃, and the time is 25 min; the ply twist coefficient is 400;
(4) Steaming and sizing the 40s/2 folded yarn prepared in the step (3), and then doubling and doubling to form a 40s/3 double-twisted folded yarn; wherein, the yarn steaming and setting parameters are as follows: the temperature is 90 ℃, and the time is 40 min; the ply twist factor is 430;
(5) Steaming and sizing the 40s/3 double-twisted plied yarn prepared in the step (4) to prepare a flame-retardant sewing thread; wherein, the yarn steaming and setting parameters are as follows: the temperature is 70 deg.C, and the time is 80 min.
Example 2
The flame-retardant sewing thread comprises the following raw materials in percentage by mass:
50% of aramid 1313, 30% of polyaryl oxadiazole fiber and 20% of high-strength polyester staple fiber;
The length of each fiber is 51mm, and the fineness is 1.0-3.0 dt; the breaking strength of the polyester staple fiber is 5.4-6.0 cN/dtex, and the elongation at break is 28-32%.
The production process of the flame-retardant sewing thread comprises the following steps:
(1) According to the mass percentage, aramid fiber and polyoxadiazole fiber are mixed into raw slivers in a disc mode, high-strength polyester staple fiber is independently made into the raw slivers, then three-way combination is carried out in a drawing process, the three types of fiber are mixed, and the mixed fiber is spun into 40s blended yarn through the technological processes of blowing, carding, drawing, roving and spinning;
(2) Twisting the 40s blended yarn prepared in the step (1) with a single yarn twist coefficient of 300 to form spun yarn cop;
(3) Steaming and shaping the spun yarn bobbin yarn prepared in the step (2), and then winding, doubling and doubling to form 40s/2 folded yarn; wherein, the yarn steaming and setting parameters are as follows: the temperature is 85 ℃, and the time is 25 min; the ply twist factor is 430;
(4) Steaming and sizing the 40s/2 folded yarn prepared in the step (3), and then doubling and doubling to form a 40s/3 double-twisted folded yarn; wherein, the yarn steaming and setting parameters are as follows: the temperature is 90 ℃, and the time is 40 min; the ply twist factor is 430;
(5) Steaming and sizing the 40s/3 double-twisted plied yarn prepared in the step (4) to prepare a flame-retardant sewing thread; wherein, the yarn steaming and setting parameters are as follows: the temperature is 110 ℃ and the time is 20 min.
Example 3
The flame-retardant sewing thread comprises the following raw materials in percentage by mass:
60% of aramid 1313, 16% of polyaryloxadiazole fiber and 28% of high-strength nylon 66 short fiber;
The length of each fiber is 51mm, and the fineness is 1.0-3.0 dt; the high-strength nylon 66 short fiber has the breaking strength of 5.4-6.0 cN/dtex and the elongation at break of 28-32%.
The production process of the flame-retardant sewing thread comprises the following steps:
(1) According to the mass percentage, aramid fiber and polyaryl oxadiazole fiber are mixed into raw slivers in a disc mode, high-strength nylon 66 short fiber is independently made into the raw slivers, then three-way combination is carried out in a drawing process, the three types of fiber are mixed, and the mixed fiber is spun into 40s blended yarn through the technological processes of blowing, carding, drawing, roving and spinning;
(2) Twisting the 40s blended yarn prepared in the step (1) to form spun yarn cop, wherein the single yarn twist coefficient is 340;
(3) Steaming and shaping the spun yarn bobbin yarn prepared in the step (2), and then winding, doubling and doubling to form 40s/2 folded yarn; wherein, the yarn steaming and setting parameters are as follows: the temperature is 90 ℃, and the time is 30 min; the ply twist factor is 550;
(4) Steaming and sizing the 40s/2 folded yarn prepared in the step (3), and then doubling and doubling to form a 40s/3 double-twisted folded yarn; wherein, the yarn steaming and setting parameters are as follows: the temperature is 90 ℃, and the time is 40 min; the ply twist factor is 430;
(5) Steaming and sizing the 40s/3 double-twisted plied yarn prepared in the step (4) to prepare a flame-retardant sewing thread; wherein, the yarn steaming and setting parameters are as follows: the temperature is 60 deg.C, and the time is 80 min.
Example 4
The flame-retardant sewing thread comprises the following raw materials in percentage by mass:
54% of aramid 1313, 16% of polyaryloxadiazole fiber and 28% of high-strength nylon 6 short fiber;
The length of each fiber is 51mm, and the fineness is 1.0-3.0 dt; the high-strength nylon 6 short fiber has the breaking strength of 6.0-7.0 cN/dtex and the elongation at break of 35-39%.
The production process of the flame-retardant sewing thread comprises the following steps:
(1) According to the mass percentage, aramid fiber and polyaryl oxadiazole fiber are mixed into raw slivers in a disc mode, high-strength nylon 6 short fiber is independently made into the raw slivers, then three-way combination is carried out in a drawing process, the three types of fiber are mixed, and the mixed fiber is spun into 40s blended yarn through the technological processes of blowing, carding, drawing, roving and spinning;
(2) Twisting the 40s blended yarn prepared in the step (1) with a single yarn twist coefficient of 350 to form spun yarn cop;
(3) Steaming and shaping the spun yarn bobbin yarn prepared in the step (2), and then winding, doubling and doubling to form 40s/2 folded yarn; wherein, the yarn steaming and setting parameters are as follows: the temperature is 95 ℃, and the time is 15 min; the ply twist factor is 470;
(4) Steaming and sizing the 40s/2 folded yarn prepared in the step (3), and then doubling and doubling to form a 40s/3 double-twisted folded yarn; wherein, the yarn steaming and setting parameters are as follows: the temperature is 90 ℃, and the time is 40 min; the ply twist factor is 430;
(5) Steaming and sizing the 40s/3 double-twisted plied yarn prepared in the step (4) to prepare a flame-retardant sewing thread; wherein, the yarn steaming and setting parameters are as follows: the temperature is 80 deg.C, and the time is 60 min.
Example 5
The flame-retardant sewing thread comprises the following raw materials in percentage by mass:
62% of aramid 1313, 16% of polyaryloxadiazole fiber and 28% of high-strength nylon 6 short fiber;
The length of each fiber is 51mm, and the fineness is 1.0-3.0 dt; the high-strength nylon 6 short fiber has the breaking strength of 6.0-7.0 cN/dtex and the elongation at break of 35-39%.
The production process of the flame-retardant sewing thread comprises the following steps:
(1) According to the mass percentage, aramid fiber and polyaryl oxadiazole fiber are mixed into raw slivers in a disc mode, high-strength nylon 6 short fiber is independently made into the raw slivers, then three-way combination is carried out in a drawing process, the three types of fiber are mixed, and the mixed fiber is spun into 40s blended yarn through the technological processes of blowing, carding, drawing, roving and spinning;
(2) Twisting the 40s blended yarn prepared in the step (1) with a single yarn twist coefficient of 310 to form spun yarn cop;
(3) Steaming and shaping the spun yarn bobbin yarn prepared in the step (2), and then winding, doubling and doubling to form 40s/2 folded yarn; wherein, the yarn steaming and setting parameters are as follows: the temperature is 60 ℃, and the time is 40 min; the ply twist factor is 520;
(4) Steaming and sizing the 40s/2 folded yarn prepared in the step (3), and then doubling and doubling to form a 40s/3 double-twisted folded yarn; wherein, the yarn steaming and setting parameters are as follows: the temperature is 90 ℃, and the time is 40 min; the ply twist factor is 430;
(5) Steaming and sizing the 40s/3 double-twisted plied yarn prepared in the step (4) to prepare a flame-retardant sewing thread; wherein, the yarn steaming and setting parameters are as follows: the temperature is 85 ℃ and the time is 55 min.
Tables for testing yarn count, tenacity, elongation at break and flame retardancy of the flame-retardant sewing threads prepared in examples 1 to 5
From the table, the flame-retardant sewing thread prepared by the production process disclosed by the invention is not damaged due to the breakage of the sewing thread when meeting fire for 12s after the flame-retardant fabric is sewn, and the flame-retardant effect of the flame-retardant sewing thread disclosed by the invention is better.
The above-described embodiments should not be construed as limiting the scope of the invention, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (10)
1. The flame-retardant sewing thread is characterized by comprising the following raw materials in percentage by mass: 50-62% of aramid fiber, 16-30% of aromatic oxadiazole fiber and the balance of nylon short fiber or polyester short fiber.
2. The flame retardant sewing thread of claim 1, wherein the nylon staple fiber or the fine denier polyester staple fiber has a single fiber strength of not less than 5.0 cN/dtex.
3. The flame retardant sewing thread of claim 1, wherein the aramid fiber is aramid 1313; the nylon short fibers are nylon 6 short fibers or nylon 66 short fibers.
4. The flame-retardant sewing thread according to claim 1, wherein the fiber length in each raw material is 51mm and the fineness is 1.0 to 3.0 dt.
5. The flame retardant sewing thread of claim 3,
The breaking strength of the polyester staple fibers is 5.4-6.0 cN/dtex, and the elongation at break is 28-32%;
The nylon 66 short fiber has the breaking strength of 5.4-6.0 cN/dtex and the elongation at break of 28-32%;
The nylon 6 short fiber has a breaking strength of 6.0-7.0 cN/dtex and an elongation at break of 35-39%.
6. A process for producing a flame retardant sewing thread according to claim 1, comprising the steps of:
(1) Mixing the components in a certain sequence according to the mass percentage to spin 40s blended yarn;
(2) Twisting the 40s blended yarn prepared in the step (1) to form spun yarn cop;
(3) Steaming and shaping the spun yarn bobbin yarn prepared in the step (2), and then winding, doubling and doubling to form 40s/2 folded yarn;
(4) Steaming and sizing the 40s/2 folded yarn prepared in the step (3), and then doubling and doubling to form a 40s/3 double-twisted folded yarn;
(5) And (4) steaming and sizing the 40s/3 double-twisted plied yarn prepared in the step (4) to prepare the flame-retardant sewing thread.
7. The process for producing a flame retardant sewing thread according to claim 6,
The mixing sequence of the components in the step (1) is as follows: the aramid fiber and the polyoxadiazole fiber are coiled and mixed into raw strips, nylon short fiber or polyester short fiber is separately made into raw strips, and then three-way combination is carried out in the drawing process to mix the three fibers.
8. The process for producing a flame retardant sewing thread according to claim 6,
The twisting coefficient of the 40s blended yarn twisting in the step (2) is 300-350;
In the step (3), the stranding and twisting coefficient is 400-550;
The stranding and twisting coefficient in the step (4) is 430.
9. The process for producing a flame retardant sewing thread according to claim 6,
The yarn steaming and setting parameters of the spun yarn cop in the step (3) are as follows: the temperature is 60-95 ℃, and the time is 15-40 min;
In the step (4), the yarn steaming and setting parameters of 40s/2 folded yarns are as follows: the temperature is 90 ℃, and the time is 40 min;
In the step (5), the yarn steaming and setting parameters of the 40s/3 double-twisted plied yarn are as follows: the temperature is 60-85 ℃, and the time is 20-80 min.
10. The process for producing a flame retardant sewing thread according to claim 6,
The strength of the 40s/2 folded yarn is not lower than 700cN, and the elongation at break is not lower than 17%;
The strength of the 40s/3 double-twisted yarn is not less than 1200cN, and the elongation at break is not less than 20%.
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| CN115247289A (en) * | 2022-01-27 | 2022-10-28 | 四川大学 | Co-spun fiber and method of making the same |
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Inventor after: Li Hanli Inventor after: Wang Tongwei Inventor after: You Jingbao Inventor after: Wang Yuhua Inventor after: Yin Jihui Inventor after: Yu Shengping Inventor after: Dong Yunfang Inventor after: Li Chao Inventor after: Li Xixue Inventor after: Yang Zumin Inventor after: Bai Jie Inventor after: Lv Jihong Inventor after: Feng Shuo Inventor after: Pang Weixin Inventor after: Li Jiantang Inventor before: Li Hanli Inventor before: Yin Jihui Inventor before: You Jingbao Inventor before: Jia Xuefei Inventor before: Yu Shengping Inventor before: Dong Yunfang Inventor before: Li Hanshun Inventor before: Pang Weixin Inventor before: Li Jiantang Inventor before: Wang Tongwei Inventor before: Wang Wenping Inventor before: Wang Yuhua Inventor before: Wang Honglin Inventor before: Guo Peicheng |
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Application publication date: 20200717 |