Polyphenylene sulfide short fiber blended yarn for diaphragm and spinning method of polyphenylene sulfide short fiber blended yarn

Abstract

The invention is suitable for the technical field of spinning, and provides a polyphenylene sulfide short fiber blended yarn for a diaphragm, the British system count of the blended yarn is 10-20 S, the blended yarn is made of polyphenylene sulfide short fibers of different specifications, the fineness of the polyphenylene sulfide short fibers is 0.89-6.67 dtex, and the length of the polyphenylene sulfide short fibers is 38-51 mm. The invention further provides a spinning method of the polyphenylene sulfide short fiber blended yarn for the diaphragm. The spinning method comprises the steps of curing, opening and cleaning, carding, drawing, roving, spinning and spooling. The polyphenylene sulfide fibers of different specifications are blended and spun, the yarn twist is properly reduced, the porosity is increased from the yarn end by means of the diameter difference and the length difference naturally existing among the fibers of different specifications, meanwhile, the yarn body is more fluffy due to the low twist, the porosity is further increased, and the yarn quality is improved. The yarn has the advantages of being good in evenness, little in hairiness, low in twist and fluffy, high in yield and the like, and a diaphragm prepared from the yarn has the advantages of being high in air tightness, high in ion permeability, high in porosity, small in pore and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of spinning, and in particular relates to a polyphenylene sulfide staple fiber blended yarn for a diaphragm and a spinning method thereof. Background Art

[0002] The technology of hydrogen production by electrolysis of alkaline aqueous solution is a mature and widely used technology with high efficiency and low cost. The main materials used include diaphragm, metal alloy electrode and KOH electrolyte. The principle is to use alkaline water electrolyzer to produce H2 at the cathode and O2 at the anode by electrolyzing water. In this process, the two gases need to be separated, otherwise H2 and O2 will mix, which will not only fail to achieve the purpose of producing H2, but also bring safety hazards. The diaphragm is the key material to separate H2 and O2. Therefore, the quality of the diaphragm is directly related to the purity and power consumption of H2 and O2. With the development of hydrogen energy, diaphragms have become a research hotspot at home and abroad.

[0003] The earliest alkaline hydrogen production diaphragms were made of asbestos fiber, whose main component is hydrated magnesium silicate. It has the advantages of excellent hydrophilicity and the ability to inhibit the reverse diffusion of hydroxide ions, which very well meets the performance requirements of alkaline water electrolysis diaphragms. However, asbestos is a primary carcinogen, which has led to its complete withdrawal from the hydrogen production market. PPS (polyphenylene sulfide) diaphragm, also known as fabric diaphragm, is a diaphragm cloth made of polyphenylene sulfide fiber through weaving, spunlace and other processes. It can maintain stable performance under alkaline solution and high temperature conditions. Therefore, it is widely used to prepare alkaline hydrogen production diaphragms and is also the mainstream diaphragm for alkaline water electrolysis hydrogen production.

[0004] Existing PPS (polyphenylene sulfide) diaphragms are all made of polyphenylene sulfide short fibers of one specification. The fabric thickness is usually above 700 microns. The fibers in the yarn are all of the same specification, and the porosity between the fibers is small, resulting in low porosity of the diaphragm, low hydrogen production efficiency, and increased electricity cost for alkaline water electrolysis to produce hydrogen. This is also the cost bottleneck that currently prevents water-to-hydrogen production from being promoted on a large scale. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a polyphenylene sulfide staple fiber blended yarn for a diaphragm, aiming to solve the problems raised in the above-mentioned background technology.

[0006] The embodiment of the present invention is implemented as follows: a polyphenylene sulfide staple fiber blended yarn for a diaphragm, the blended yarn has an English count of 10 to 20S, and is made of polyphenylene sulfide staple fibers of different specifications, the polyphenylene sulfide staple fibers have a fineness of 0.89 to 6.67 dtex, and a length of 38 to 51 mm.

[0007] Another object of an embodiment of the present invention is to provide a spinning method for polyphenylene sulfide staple fiber blended yarn for diaphragm, comprising the steps of curing, opening and cleaning process, carding process, drawing process, roving process, spun yarn process and winding process.

[0008] Preferably, the method comprises the following steps: mixing polyphenylene sulfide staple fibers of different specifications and curing them, and then sequentially subjecting the mixed fibers to a cleaning process, a carding process, a drawing process, a roving process, a spun spinning process and a winding process.

[0009] Preferably, the method comprises the following steps: curing polyphenylene sulfide staple fibers of different specifications separately, and then sequentially carrying out opening and cleaning processes and combing processes respectively, and then carrying out mixing and drawing processes and roving processes for polyphenylene sulfide fibers of the same length and different finenesses, and finally carrying out spun spinning processes and winding processes for different rovings.

[0010] Preferably, the curing specifically includes the following steps: weighing water, antistatic agent, crude oil and cohesive agent, mixing them evenly and spraying them on polyphenylene sulfide fibers, placing the polyphenylene sulfide fibers in an environment with a temperature of 28-32°C and a humidity of 58%-63% for 24 hours, and the mass ratio of the polyphenylene sulfide staple fibers, water, antistatic agent, crude oil and cohesive agent is 1:0.1:0.025:0.01:0.005.

[0011] Preferably, the method specifically comprises the following steps:

[0012] (1) Curing: polyphenylene sulfide fibers of different specifications are mixed and cured to obtain mixed fibers;

[0013] (2) Blowing process: The mixed fiber is passed through a disc plucking machine, a multi-bin mixing machine, a combing needle opening machine, a vibrating cotton box feeding machine, and a combing machine to obtain a mixed raw material;

[0014] (3) Combing process: The mixed raw materials are subjected to a process of mainly combing and supplemented by mixing, with an appropriate combing distance, increasing the cylinder speed, increasing the sliver basis weight, and reducing the sliver output speed to obtain mixed sliver;

[0015] (4) Drawing and roving process: The mixed raw sliver is drawn into ready sliver through two drawing steps, and then made into mixed roving;

[0016] (5) Spinning process: A Siro compact spinning device is installed in the spinning process to spin the mixed roving into a cop yarn through the Siro compact spinning process;

[0017] (6) Winding process: the bobbin yarn is made into cone yarn.

[0018] Preferably, the method specifically comprises the following steps:

[0019] (1) Health care: Health care of polyphenylene sulfide fibers of different specifications;

[0020] (2) Blowing process: polyphenylene sulfide fibers of different specifications are sequentially passed through a disc plucking machine, a multi-bin blending machine, a combing needle opening machine, a vibrating cotton box feeding machine, and a combing machine;

[0021] (3) Carding process: Different carding processes are used for polyphenylene sulfide fibers of different specifications. The process principle is to increase the speed of the cotton box beater, reduce the cylinder speed, increase the carding distance, and reduce the cotton drop, so as to obtain carded slivers of different specifications.

[0022] (4) Drawing and roving process: the raw polyphenylene sulfide fibers of the same length and different fineness are mixed and drawn, and after two drawing steps, several groups of mixed polyphenylene sulfide fibers of the same length and different fineness are obtained, and then rovings of different specifications are made;

[0023] (5) Spinning process: The spinning process is equipped with a Siro compact spinning device to spin rovings of different specifications into cops through the Siro compact spinning process;

[0024] (6) Winding process: the bobbin yarn is made into cone yarn.

[0025] A polyphenylene sulfide staple fiber blended yarn for a diaphragm provided by an embodiment of the present invention is obtained by blending polyphenylene sulfide fibers of different specifications and appropriately reducing the yarn twist, and increasing the porosity from the yarn end by utilizing the diameter difference and length difference naturally existing between fibers of different specifications. At the same time, the lower twist makes the yarn body more fluffy, further increasing the porosity. The yarn produced by the spinning method of the embodiment of the present invention has the advantages of good yarn evenness, less hairiness, low twist and fluffy, and higher yield.

[0026] The yarn can be made into 2-ply to 4-ply yarns according to different requirements of diaphragm thickness, and the ply yarns can be used to weave diaphragm cloth of required thickness. The diaphragm has the characteristics of high air tightness, strong ion permeability, high porosity, small pores, etc., which reduces the resistance of the diaphragm, greatly reduces power loss, improves power conversion rate, and increases the service life of the diaphragm. The purity of the prepared hydrogen and oxygen is above 99.93%. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] A polyphenylene sulfide staple fiber blended yarn for a diaphragm, the spinning method of which comprises the following steps:

[0029] (1) Health preservation can be achieved through the following two methods:

[0030] ① Bulk fiber mixing: polyphenylene sulfide fibers of different specifications are mixed and cured;

[0031] ②Spinning blending: Polyphenylene sulfide fibers of different specifications are cured separately;

[0032] Health care method: Mix 10% water with the same fiber mass fraction, 2.5% antistatic agent, 1% wool oil, and 0.5% cohesive agent, and spray them on the polyphenylene sulfide fiber through an atomizer, and place them in a wool warehouse at a temperature of 28-32°C and a humidity of 58%-63% for 24 hours to improve the spinnability of the polyphenylene sulfide fiber;

[0033] (2) The opening and cleaning process can be carried out in the following two ways:

[0034] ① Bulk fiber mixing: Polyphenylene sulfide fibers of different specifications are mixed and passed through a disc plucker → a multi-bin mixer → a combing needle opener → a vibrating cotton box feeder → a combing machine;

[0035] ②Spinning blending: Polyphenylene sulfide fibers of different specifications are respectively passed through a disc plucker → a multi-bin blender → a combing needle opener → a vibrating cotton box feeder → a combing machine;

[0036] Skip the rolling process, reduce cotton drop, reduce the impact on the fiber, reduce fiber damage, and reduce the generation of short fibers;

[0037] (3) The combing process can be carried out in the following two ways:

[0038] ① Bulk fiber mixing: The mixed raw material combing process is mainly based on combing and supplemented by mixing. A moderate combing distance is used to increase the cylinder speed, increase the sliver quantity, and reduce the sliver output speed;

[0039] ② Yarn blending: Different carding processes are used for polyphenylene sulfide fibers of different specifications. Different carding processes are used for 0.89dtex-2.22dtex, 2.23dtex-3.33dtex, 3.34dex-6.67dtex, 38mm, and 51mm polyphenylene sulfide fibers, respectively. The overall process principle is to increase the speed of the cotton box beater, reduce the cylinder speed, enlarge the carding distance, and reduce the cotton drop. On the one hand, different specifications of fibers can be carded separately, the carding quality can be improved, and the raw sliver dryness can be reduced. On the other hand, different specifications of polyphenylene sulfide fibers can be mixed in different proportions.

[0040] (4) Drawing and roving process can be carried out in the following two ways, among which the drawing process adopts two steps:

[0041] ① Bulk fiber mixing: The mixed raw slivers of polyphenylene sulfide fibers of different specifications are made into ready slivers through two drawing processes, and then made into roving;

[0042] ② Yarn mixing: polyphenylene sulfide fibers of the same length and different fineness are mixed and drawn. After two draws, 38mm polyphenylene sulfide fiber mixed slivers of different fineness and 51mm polyphenylene sulfide fiber mixed slivers of different fineness are obtained, and then roving is made;

[0043] (5) The spinning process can be carried out in the following two ways:

[0044] ① Bulk fiber mixing: The polyphenylene sulfide mixed roving is spun into cop yarn through the Siro compact spinning process;

[0045] ② Yarn blending: The mixed 38mm polyphenylene sulfide fiber roving and the mixed 51mm polyphenylene sulfide fiber roving are spun into cops by siro compact spinning;

[0046] The siro compact spinning device is installed in the spinning process, and the negative pressure is increased by 10%-20% compared with ordinary varieties. The spinning drafting gauge adopts the improved gauge suitable for medium and long fibers. Under the condition of ensuring less end breakage, the weighted and high-arched steel wire ring is used as much as possible, and the speed is appropriately reduced;

[0047] (6) Winding process: Mainly to ensure that the yarn channel is smooth, avoid scratching, control the tension of the yarn to a small level, and reduce the generation of hairiness.

[0048] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0049] Example 1

[0050] A polyphenylene sulfide staple fiber blended yarn for a diaphragm, the spinning method of which comprises the following steps:

[0051] (1) Siro compact spinning polyphenylene sulfide blended yarn, yarn count is 16Ne, the polyphenylene sulfide fibers used are as follows (proportions by mass): 10% 1.56 dtex*38 mm, 10% 3.33 dtex*38 mm, 10% 5.56 dtex*38 mm, 10% 0.89 dtex*51 mm, 20% 3.33 dtex*51 mm, 40% 6.67 dtex*51 mm;

[0052] (2) The process flow is:

[0053]

[0054] (3) Process of each process:

[0055] Blow-drying: The equipment configuration is FA002A disc plucker → FA022-6 multi-bin cotton mixer → ZF1102A needle opener → FA046A vibrating cotton box feeder → FA141A single beater lap machine. The main process parameters are: ZFA1102A needle beater speed 500rpm, roller and needle beater spacing 11mm, comprehensive beater speed 650rpm;

[0056] Carding: FA201B carding machine is used, and the main process parameters are: sliver weight 30g / 5m, sliver delivery speed 50m / min, cylinder speed 280rpm, licker-in speed 554rpm, flat board speed 195mm / min, cylinder and flat board spacing 10 / 9 / 9 / 9 / 10 (1inch‰);

[0057] Drawing: The drawing process adopts two drawing steps, and the number of drawing is six. The equipment is JWF1310 drawing frame (one drawing) → RSB-D22C drawing frame (final drawing). The main process parameters are: the first drawing quantity is 26g / 5m, the total draft is 6.93 times, the rear zone draft is 1.75 times, the roller gauge (front zone × rear zone) is 16×30mm, and the strip speed is 350m / min; the final drawing number is 6, the quantity is 26g / 5m, the total draft is 5.98 times, the rear zone draft is 1.3 times, the roller gauge (front zone × rear zone) is 17.5×27mm, and the strip speed is 300m / min.

[0058] Roving: The roving process adopts FA497 roving machine, and the main process parameters are: roving weight 7.0g / 10m, twist 2.5 twist / 10cm, total draft 7.9 times, rear draft 1.19 times, roller gauge (front×middle×rear) 13×36×42mm, jaw gauge block 7mm, spindle speed 750rpm;

[0059] Spinning: The spinning process is produced on a JWF1510 four-roller Siro compact spinning machine. The twist is controlled to be low, the negative pressure is increased, and the wire ring is used heavily. The main process parameters are: yarn count is 16Ne in English, the total drafting multiple is 40.8 times, the back zone drafting multiple is 1.136 times, the jaw spacing block is 5.0mm, the twist is 30 twists / 10cm, the roller spacing (front×back) is 20×40mm, the negative pressure of the special-shaped tube is about 45mbar, and the spindle speed is 11000rpm;

[0060] Winding: SAVIO Polar L-type automatic winder was used for production, with a winding speed of 600 m / min and electronic yarn clearer channel settings as follows: N: 6.0, DS×LS: 3.5×3.6, DL×LL: 1.5×28, -D×-L: -22%×20.

[0061] Example 2

[0062] A polyphenylene sulfide staple fiber blended yarn for a diaphragm, the spinning method of which comprises the following steps:

[0063] (1) Siro compact spinning polyphenylene sulfide blended yarn, yarn count is 10Ne, the polyphenylene sulfide fibers used are as follows (proportions by mass): 20% 1.33 dtex*38 mm, 20% 2.78 dtex*38 mm, 10% 4.44 dtex*38 mm, 30% 1.33 dtex*51 mm, 10% 3.33 dtex*51 mm, 10% 5.56 dtex*51 mm;

[0064] (2) The process flow is:

[0065]

[0066] (3) Process of each process:

[0067] Blow-drying: The equipment configuration is FA002A disc plucker → FA022-6 multi-bin cotton mixer → ZF1102A needle opener → FA046A vibrating cotton box feeder; the main process parameters are: ZFA1102A needle beater speed 500rpm, roller and needle beater spacing 11mm, comprehensive beater speed 650rpm;

[0068] Carding: FA201B carding machine is used, and the main process parameters are: sliver weight 30g / 5m, sliver delivery speed 60m / min, cylinder speed 300rpm, licker-in speed 594rpm, flat plate speed 195mm / min, cylinder and flat plate spacing 9 / 8 / 8 / 8 / 9 (1inch‰);

[0069] Drawing: The drawing process adopts two drawing steps, and the number of drawing is six. The equipment is JWF1310 drawing frame (one drawing) → RSB-D22C drawing frame (final drawing). The main process parameters are: the first drawing quantity is 26g / 5m, the total draft is 6.93 times, the rear zone draft is 1.75 times, the roller gauge (front zone × rear zone) is 16×30mm, and the strip speed is 350m / min; the final drawing number is 6, the quantity is 26g / 5m, the total draft is 5.98 times, the rear zone draft is 1.3 times, the roller gauge (front zone × rear zone) is 18.5×27mm, and the strip speed is 300m / min.

[0070] Roving: The roving process adopts FA497 roving machine, and the main process parameters are: roving quantity 8.0g / 10m, twist 2.5 twist / 10cm, total draft 5.78 times, rear draft 1.19 times, roller gauge (front×middle×rear) 13×36×42mm, jaw gauge block 8mm, spindle speed 700rpm;

[0071] Spinning: The spinning process is produced on a JWF1510 four-roller Siro compact spinning machine. The twist is controlled to be low, the negative pressure is increased, and the wire ring is used heavily. The main process parameters are: yarn count in British system is 10Ne, the total drafting multiple is 29.1 times, the back zone drafting multiple is 1.136 times, the jaw spacing block is 6.0mm, the twist is 27 twists / 10cm, the roller spacing (front×back) is 20×40mm, the negative pressure of the special-shaped tube is about 54mbar, and the spindle speed is 9000rpm;

[0072] Winding: SAVIO Polar L-type automatic winder was used for production, with a winding speed of 600 m / min and electronic yarn clearer channel settings as follows: N: 6.0, DS×LS: 3.5×3.6, DL×LL: 1.5×28, -D×-L: -22%×20.

[0073] Example 3

[0074] A polyphenylene sulfide staple fiber blended yarn for a diaphragm, the spinning method of which comprises the following steps:

[0075] (1) Siro compact spinning polyphenylene sulfide blended yarn, yarn count is 20Ne, the polyphenylene sulfide fibers used are as follows (proportions by mass): 16.7% 1.33 dtex*38 mm, 16.7% 2.78 dtex*38 mm, 16.6% 4.44 dtex*38 mm, 16.7% 1.33 dtex*51 mm, 16.7% 3.33 dtex*51 mm, 16.6% 5.56 dtex*51 mm;

[0076] (2) The process flow is as follows:

[0077]

[0078]

[0079] (3) Process technology

[0080] Blow-drying: The equipment configuration is FA002A disc plucker → FA022-6 multi-bin cotton mixer → ZF1102A needle opener → FA046A vibrating cotton box feeder. The main process parameters are: ZFA1102A needle beater speed 500rpm, roller and needle beater spacing 11mm, comprehensive beater speed 650rpm;

[0081] Carding: FA201B carding machine is used, and the main process parameters are:

[0082] ①0.89dtex-2.22dtex: sliver weight 25g / 5m, sliver delivery speed 70m / min, cylinder speed 300rpm, licker-in speed 594rpm, flat plate speed 195mm / min, cylinder and flat plate spacing 9 / 8 / 8 / 8 / 9 (1inch‰);

[0083] ②2.23dtex-3.33dtex: sliver weight 25g / 5m, sliver delivery speed 60m / min, cylinder speed 280rpm, licker-in speed 554rpm, flat plate speed 180mm / min, cylinder and flat plate gauge 10 / 9 / 9 / 9 / 10 (unit × 1inch‰);

[0084] ③3.34dex-6.67dtex: sliver weight 25g / 5m, sliver delivery speed 60m / min, cylinder speed 260rpm, licker-in speed 515rpm, flat board speed 165mm / min, cylinder and flat board spacing 10 / 9 / 9 / 9 / 10 (unit × 1inch‰);

[0085] Drawing: Drawing process: 38mm and 51mm polyphenylene sulfide fibers are drawn separately, both using two draws, the number of draws is six, the equipment is JWF1310 drawing frame (one draw) → RSB-D22C drawing frame (last draw), the main process parameters are:

[0086] ①0.89dtex-6.67dtex*38mm: Three kinds of polyphenylene sulfide fibers are combined in a 2+2+2 manner. The fineness of polyphenylene sulfide fibers in the raw sliver is 1.33dtex*38mm, 2.78dtex*38mm, 4.44dtex*38mm, 4.44dtex*38mm, 2.78dtex*38mm, and 1.33dtex*38mm from one side to the other. That is, the finer polyphenylene sulfide fibers are arranged outside, with a combined weight of 23.7g / 5m, a total draft of 6.33 times, a rear zone draft of 1.75 times, a roller gauge (front zone × rear zone) of 10×20mm, and a sliver delivery speed of 350m / min; the number of final folding is 6, with a combined weight of 23.7g / 5m, a total draft of 5.98 times, a rear zone draft of 1.3 times, a roller gauge (front zone × rear zone) of 13.5×22mm, and a sliver delivery speed of 300m / min.

[0087] ②0.89dtex-6.67dtex*51mm: The method of combining is the same as ①, that is, the finer polyphenylene sulfide fibers are arranged outside, the combined quantity is 23.7g / 5m, the total draft is 6.33 times, the draft in the back zone is 1.75 times, the roller gauge (front zone×back zone) is 20×32mm, and the sliver delivery speed is 350m / min; the number of final combining is 6, the quantitative quantity is 23.7g / 5m, the total draft is 5.98 times, the draft in the back zone is 1.3 times, the roller gauge (front zone×back zone) is 23.5×32mm, and the sliver delivery speed is 300m / min;

[0088] Roving: The roving process is produced by FA497 roving machine, and the main process parameters are:

[0089] ①0.89dtex-6.67dtex*38mm: roving weight 6.0g / 10m, twist 2.9 twists / 10cm, total draft 7.9 times, rear draft 1.19 times, roller gauge (front×middle×rear) 11×26×36mm, jaw gauge 7mm, spindle speed 850rpm;

[0090] ②0.89dtex-6.67dtex*38mm: roving weight 7.0g / 10m, twist 2.1 twist / 10cm, total draft 7.9 times, rear draft 1.19 times, roller gauge (front×rear, remove the second roller) 50×60mm, jaw gauge block 7mm, spindle speed 800rpm;

[0091] Spinning: The spinning process is produced on a JWF1510 four-roller Siro compact spinning machine. The roller gauge adopts a medium gauge of 38mm and 51mm, the twist is controlled at a low level, the negative pressure is increased, and the wire ring is used heavily. The main process parameters are: yarn count in British system is 20Ne, the total draft multiple is 43.7 times, the back zone draft multiple is 1.212 times, the jaw gauge block is 5.0mm, the twist is 35 twists / 10cm, the roller gauge (front×back) is 26*41mm, the negative pressure of the special-shaped tube is about 46mbar, and the spindle speed is 12000rpm.

[0092] Winding: SAVIO Polar L-type automatic winder was used for production, with a winding speed of 600 m / min and electronic yarn clearer channel settings as follows: N: 5.5, DS×LS: 3.2×3.0, DL×LL: 1.4×25, -D×-L: -20%×18.

[0093] Example 4

[0094] A polyphenylene sulfide staple fiber blended yarn for a diaphragm, the spinning method of which comprises the following steps:

[0095] (1) Siro compact spinning polyphenylene sulfide blended yarn, yarn count is 14Ne, the polyphenylene sulfide fibers used are as follows (proportions by mass): 25% 1.56 dtex*38 mm, 25% 5.56 dtex*38 mm, 25% 0.89 dtex*51 mm, 25% 3.33 dtex*51 mm;

[0096] (2) The process flow is as follows:

[0097]

[0098] (3) Process of each process:

[0099] Blow-drying: The equipment configuration is FA002A disc plucker → FA022-6 multi-bin cotton mixer → ZF1102A needle opener → FA046A vibrating cotton box feeder. The main process parameters are: ZFA1102A needle beater speed 500rpm, roller and needle beater spacing 11mm, comprehensive beater speed 650rpm;

[0100] Carding: FA201B carding machine is used, and the main process parameters are:

[0101] ①0.89dtex-2.22dtex: sliver weight 26g / 5m, sliver delivery speed 70m / min, cylinder speed 300rpm, licker-in speed 594rpm, flat plate speed 195mm / min, cylinder and flat plate spacing 9 / 8 / 8 / 8 / 9 (1inch‰);

[0102] ②2.23dtex-3.33dtex: sliver weight 26g / 5m, sliver delivery speed 60m / min, cylinder speed 280rpm, licker-in speed 554rpm, flat board speed 180mm / min, cylinder and flat board spacing 10 / 9 / 9 / 9 / 10 (unit × 1inch‰);

[0103] ③3.34dex-6.67dtex: sliver weight 26g / 5m, sliver delivery speed 60m / min, cylinder speed 260rpm, licker-in speed 515rpm, flat board speed 165mm / min, cylinder and flat board spacing 10 / 9 / 9 / 9 / 10 (unit × 1inch‰);

[0104] Drawing: Drawing process: 38mm and 51mm polyphenylene sulfide fibers are drawn separately, both using two draws, the number of draws is six, the equipment is JWF1310 drawing frame (one draw) → RSB-D22C drawing frame (last draw), the main process parameters are:

[0105] ①0.89dtex-6.67dtex*38mm: Two kinds of polyphenylene sulfide fibers are combined in a 3+3 manner, with the finer polyphenylene sulfide fibers arranged outside, with a combined quantity of 26g / 5m, a total draft of 6.00 times, a rear zone draft of 1.75 times, a roller gauge (front zone × rear zone) of 10×20mm, and a sliver delivery speed of 350m / min; the number of final combined fibers is 6, with a quantitative value of 26g / 5m, a total draft of 5.98 times, a rear zone draft of 1.3 times, a roller gauge (front zone × rear zone) of 13.5×22mm, and a sliver delivery speed of 300m / min;

[0106] ②0.89dtex-6.67dtex*51mm: The method of combining is the same as ①, that is, the finer polyphenylene sulfide fibers are arranged outside, the combined quantity is 26g / 5m, the total draft is 6.00 times, the draft in the rear zone is 1.75 times, the roller gauge (front zone×rear zone) is 20×32mm, and the sliver delivery speed is 350m / min; the number of final combining is 6, the quantitative quantity is 26g / 5m, the total draft is 5.98 times, the draft in the rear zone is 1.3 times, the roller gauge (front zone×rear zone) is 23.5×32mm, and the sliver delivery speed is 300m / min;

[0107] Roving: The roving process is produced by FA497 roving machine, and the main process parameters are:

[0108] ①0.89dtex-6.67dtex*38mm: roving weight 7.0g / 10m, twist 2.5 twist / 10cm, total draft 7.9 times, rear draft 1.19 times, roller gauge (front×middle×rear) 11×26×36mm, jaw gauge block 7mm, spindle speed 750rpm;

[0109] ②0.89dtex-6.67dtex*38mm: roving weight 7.0g / 10m, twist 2.1 twist / 10cm, total draft 7.9 times, rear draft 1.19 times, roller gauge (front×rear, remove the second roller) 50×60mm, jaw gauge block 7mm, spindle speed 700rpm;

[0110] Spinning: The spinning process is produced on a JWF1510 four-roller Siro compact spinning machine. The roller gauge adopts a medium gauge of 38mm and 51mm, the twist is controlled at a low level, the negative pressure is increased, and the wire ring is used heavily. The main process parameters are: yarn count in British system is 14Ne, the total draft multiple is 35.34 times, the back zone draft multiple is 1.136 times, the jaw gauge block is 6.0mm, the twist is 30 twists / 10cm, the roller gauge (front×back) is 26*41mm, the negative pressure of the special-shaped tube is about 51mbar, and the spindle speed is 11000rpm;

[0111] Winding: SAVIO Polar L-type automatic winder was used for production, with a winding speed of 600 m / min and electronic yarn clearer channel settings as follows: N: 6.0, DS×LS: 3.5×3.6, DL×LL: 1.5×28, -D×-L: -22%×20.

[0112] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A polyphenylene sulfide staple fiber blended yarn for a diaphragm, characterized in that: The blended yarn has an imperial count of 10-20S and is made of polyphenylene sulfide staple fibers of different specifications. The polyphenylene sulfide staple fibers have a fineness of 0.89-6.67 dtex and a length of 38-51 mm.

2. A spinning method of polyphenylene sulfide staple fiber blended yarn for diaphragm according to claim 1, characterized in that: The process includes the steps of health care, opening and cleaning process, carding process, drawing process, roving process, spun spinning process and winding process.

3. The spinning method of polyphenylene sulfide staple fiber blended yarn for diaphragm according to claim 2, characterized in that: The following steps are involved: The polyphenylene sulfide staple fibers of different specifications are mixed and cured, and then the mixed fibers are sequentially subjected to the processes of opening and cleaning, carding, drawing, roving, spinning and winding.

4. The spinning method of polyphenylene sulfide staple fiber blended yarn for diaphragm according to claim 2, characterized in that: The following steps are involved: The polyphenylene sulfide staple fibers of different specifications are cured separately, and then subjected to the opening and cleaning process and the combing process in sequence. The polyphenylene sulfide fibers of the same length and different fineness are then subjected to the mixing and drawing process and the roving process. Finally, the different rovings are subjected to the spinning process and the winding process.

5. The spinning method of polyphenylene sulfide staple fiber blended yarn for diaphragm according to any one of claims 2 to 4, characterized in that: The curing specifically comprises the following steps: weighing water, antistatic agent, crude oil and cohesive agent, mixing them evenly and spraying them on polyphenylene sulfide fiber, placing the polyphenylene sulfide fiber in an environment with a temperature of 28-32° C. and a humidity of 58%-63% for 24 hours, wherein the mass ratio of the polyphenylene sulfide staple fiber, water, antistatic agent, crude oil and cohesive agent is 1:0.1:0.025:0.01:0.

005.

6. The spinning method of polyphenylene sulfide staple fiber blended yarn for diaphragm according to claim 3, characterized in that: The specific steps include: (1) Curing: polyphenylene sulfide fibers of different specifications are mixed and cured to obtain mixed fibers; (2) Blowing process: The mixed fiber is passed through a disc plucking machine, a multi-bin mixing machine, a combing needle opening machine, a vibrating cotton box feeding machine, and a combing machine to obtain a mixed raw material; (3) Combing process: The mixed raw materials are subjected to a process of mainly combing and supplemented by mixing, with an appropriate combing distance, increasing the cylinder speed, increasing the sliver basis weight, and reducing the sliver output speed to obtain mixed sliver; (4) Drawing and roving process: The mixed raw sliver is drawn into ready sliver through two drawing steps, and then made into mixed roving; (5) Spinning process: A Siro compact spinning device is installed in the spinning process to spin the mixed roving into a cop yarn through the Siro compact spinning process; (6) Winding process: the tube yarn is made into cone yarn.

7. The spinning method of polyphenylene sulfide staple fiber blended yarn for diaphragm according to claim 4, characterized in that: The specific steps include: (1) Health care: Health care of polyphenylene sulfide fibers of different specifications; (2) Blowing process: polyphenylene sulfide fibers of different specifications are sequentially passed through a disc plucking machine, a multi-bin blending machine, a combing needle opening machine, a vibrating cotton box feeding machine, and a combing machine; (3) Carding process: Different carding processes are used for polyphenylene sulfide fibers of different specifications. The process principle is to increase the speed of the cotton box beater, reduce the cylinder speed, increase the carding distance, and reduce the cotton drop, so as to obtain carded slivers of different specifications. (4) Drawing and roving process: the raw polyphenylene sulfide fibers of the same length and different fineness are mixed and drawn, and after two drawing steps, several groups of mixed polyphenylene sulfide fibers of the same length and different fineness are obtained, and then rovings of different specifications are made; (5) Spinning process: The spinning process is equipped with a Siro compact spinning device to spin rovings of different specifications into cops through the Siro compact spinning process; (6) Winding process: the tube yarn is made into cone yarn.

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