CN117802819A - Preparation method and product of polyphenylene sulfide fiber paper - Google Patents
Preparation method and product of polyphenylene sulfide fiber paper Download PDFInfo
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- CN117802819A CN117802819A CN202410099760.6A CN202410099760A CN117802819A CN 117802819 A CN117802819 A CN 117802819A CN 202410099760 A CN202410099760 A CN 202410099760A CN 117802819 A CN117802819 A CN 117802819A
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- polyphenylene sulfide
- dichlorobenzene
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/58—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur
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Abstract
本发明公开了一种聚苯硫醚纤维纸的制备方法，由湿法抄造工艺制得，包括树脂原料和水，按质量百分比计，树脂原料的组成包括：聚苯硫醚树脂A 80～95％；聚苯硫醚树脂B 5～20％；所述聚苯硫醚树脂A由对二氯苯与硫源A聚合得到；所述聚苯硫醚树脂B由对二氯苯、间二氯苯与硫源B聚合得到，以对二氯苯和间二氯苯单体的投料总摩尔数为100％计，间二氯苯的投料摩尔占比为10～50％。本发明提供一种生产成本低、过程简单、兼具高力学性能与耐化学性能的聚苯硫醚纸材及其制备方法。The invention discloses a method for preparing polyphenylene sulfide fiber paper. It is produced by a wet papermaking process and includes resin raw materials and water. In terms of mass percentage, the composition of the resin raw materials includes: polyphenylene sulfide resin A 80-95 %; polyphenylene sulfide resin B 5 to 20%; the polyphenylene sulfide resin A is obtained by polymerizing p-dichlorobenzene and sulfur source A; the polyphenylene sulfide resin B is obtained by p-dichlorobenzene, m-dichlorobenzene It is obtained by polymerizing benzene and sulfur source B. When the total molar number of p-dichlorobenzene and m-dichlorobenzene monomers is 100%, the molar ratio of m-dichlorobenzene is 10 to 50%. The invention provides a polyphenylene sulfide paper material with low production cost, simple process, high mechanical properties and chemical resistance properties, and a preparation method thereof.
Description
Technical Field
The invention relates to the field of preparation of polyphenylene sulfide, in particular to a preparation method of polyphenylene sulfide fiber paper and a product thereof.
Background
The fiber paper is a solid lamellar material prepared by a papermaking process, the performance of the fiber paper is determined by the fiber material, the paper structure and the manufacturing process, and the fiber paper can be used as products such as impregnated paper, winding paper, cable paper, diaphragm paper, capacitor paper, high-temperature-resistant paper and the like. The main material of the fiber paper is selected from plant fibers and synthetic fibers, however, plant fibers such as cork have the advantages of high cellulose content and good impregnation property, but have the disadvantages of poor heat resistance, poor fiber uniformity, paper appearance defects and the like. The synthetic fiber paper can select proper synthetic fiber according to specific working conditions, and the synthetic fiber can be prepared by melt spinning or solution spinning and other methods, so that the defects of the plant fiber paper can be overcome, and common synthetic fiber materials comprise polypropylene, polyphenyl ether, polyaramid, polyphenylene sulfide and the like.
At present, synthetic fiber paper making mainly comprises two processes, namely a wet process and a dry process, and the difference of the media is different. Dry papermaking is a papermaking process in which air is used as a carrier for fibers, a thin layer of the fibers is formed on a forming wire, and the resulting paper is bonded in the form of an adhesive, hot rolling, or the like. The wet papermaking technology is a papermaking technology using water as a medium and comprises the procedures of a flow box (defibering pulping), a flow part, a net part (papermaking forming), a pressing part (dewatering), a drying part (drying), hot rolling strengthening, calendaring, coiling, and the like. The method has the advantages of mature process, high yield and the like, but in order to solve the problems of good combination and uniform dispersion among synthetic fibers in the papermaking process, auxiliary agents such as a binder, a dispersing agent and the like are often required to be added, and the process requirement is high.
Polyphenylene Sulfide (PPS) is one of six special engineering plastics, has excellent comprehensive performance, has the advantages of good chemical resistance, high temperature resistance, flame retardance, good dimensional stability, low creep amount and the like, is widely used as a structural polymer material, and more manufacturers begin to apply polyphenylene sulfide fiber paper to insulating paper, heat-resistant paper, diaphragm paper and other purposes. Commercial polyphenylene sulfide fibers are mainly prepared by melt spinning and comprise the procedures of granulating, drying, spinning, winding, barrel dropping, bundling, drafting, heat setting, oiling, curling, cutting, packaging and the like.
The insulating paper is prepared by the steps of pulp preparation, white water mixing, inclined net forming, water needling reinforcement, winding into rolls, alkali liquor treatment, hot rolling reinforcement of a light stick and the like of polyphenyl thioether short fibers, polyphenyl thioether pulp foils and low-crystallinity polyphenyl thioether short fibers. Although the patent adopts the low-crystallinity polyphenylene sulfide fiber, parameters such as melting temperature and the like are mainly determined by the material, and even if the material can be softened at a lower temperature, the problems of insufficient bonding force, interlayer peeling tendency, unstable production and the like can still occur in the thermal bonding process. Secondly, the hot rolling strengthening temperature of the patent is high (240-280 ℃), the energy consumption is high, and meanwhile, the too high hot rolling temperature causes PPS fibers to oxidize, so that the properties of the fiber paper are affected.
The method comprises the steps of preparing crimped short fibers through conventional polyphenylene sulfide melt spinning by CN101148841A of Sichuan Tex, mixing the crimped short fibers with polyvinyl alcohol, inorganic filler and reinforcing fiber for wet papermaking, and carrying out fluffing, papermaking forming, dehydration, drying, hot pressing/hot rolling and the like to obtain the fiber paper. The patent is compounded by polyphenylene sulfide fibers and non-thermally-drawn polyphenylene sulfide precursor fibers or reinforced fibers such as poly-p-phenylene terephthalamide fibers, carbon fibers, graphite fibers and the like; the patent requires a crimping process for producing polyphenylene sulfide fibers, however, the crimped fibers are agglomerated during paper making, and the paper structure is uneven. In addition, a large amount of various auxiliary agents are added in the papermaking process, and the high-temperature resistance, chemical resistance, insulation and other performances of the auxiliary agents are not enough to be comparable with those of polyphenylene sulfide materials, so that the auxiliary agents are greatly limited in use in high-temperature high-humidity and corrosion environments.
When conventional PPS fibers are used for papermaking, the temperature is high at the time of hot rolling/pressing due to its high melting point up to 285 ℃, however, PPS is extremely easily oxidized when treated at high temperature, resulting in a decrease in fiber strength, thereby affecting paper properties. For this purpose, the temperature at the time of hot rolling/pressing is lowered by adding a binder, but this method has another problem in that the chemical resistance of the binder cannot be comparable to that of polyphenylene sulfide, destroying the advantages of PPS itself.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide the polyphenylene sulfide paper with low production cost, simple process and high mechanical property and chemical resistance and the preparation method thereof.
The specific technical scheme is as follows:
the preparation method of the polyphenylene sulfide fiber paper is prepared by a wet papermaking process and comprises the following steps of:
80-95% of polyphenylene sulfide resin A;
5-20% of polyphenylene sulfide resin B;
the polyphenylene sulfide resin A is obtained by polymerizing p-dichlorobenzene and a sulfur source A;
the polyphenylene sulfide resin B is obtained by polymerizing p-dichlorobenzene, m-dichlorobenzene and a sulfur source B, and the molar ratio of m-dichlorobenzene to the total molar number of p-dichlorobenzene and m-dichlorobenzene monomers is 10-50% based on 100%.
According to the invention, the polyphenylene sulfide resin B prepared by copolymerization of m-dichlorobenzene, p-dichlorobenzene and a sulfur source is introduced into a paper formula system, and the fiber paper can be treated at a lower hot rolling/hot pressing temperature without adding an adhesive, so that the fiber paper still has excellent adhesive property, and the PPS fiber paper with high mechanical property and chemical resistance is prepared.
The polyphenylene sulfide resin A is a conventional polyphenylene sulfide resin and is obtained by polymerizing p-dichlorobenzene and a sulfur source A, wherein the molar ratio of the p-dichlorobenzene to the sulfur source is (1.0-1.2): 1.0; the sulfur source A is selected from one or more of sodium sulfide, sodium hydrosulfide and hydrogen sulfide. The weight average molecular weight of the polyphenylene sulfide resin A is 3-7 ten thousand.
The polyphenylene sulfide resin B is obtained by polymerizing p-dichlorobenzene, m-dichlorobenzene and a sulfur source B, and the molar ratio of the total dichlorobenzene (comprising the p-dichlorobenzene and the m-dichlorobenzene) to the sulfur source B is (1.0-1.2): 1.0; the sulfur source B is selected from one or more of sodium sulfide, sodium hydrosulfide and hydrogen sulfide. The weight average molecular weight of the polyphenylene sulfide resin B is 3-7 ten thousand.
Experiments show that key factors influencing the hot rolling/hot pressing temperature in the paper making process comprise the feeding mole ratio of m-dichlorobenzene in the polyphenylene sulfide resin B and the mass ratio of the polyphenylene sulfide resin B in the resin raw material.
In the polyphenylene sulfide resin B disclosed by the invention, the feeding mole ratio of m-dichlorobenzene is controlled to be 10-50%. The content of m-dichlorobenzene is too low, and the melting point is not obviously reduced; when the content of m-dichlorobenzene is too large, the molar ratio of the effective dichlorobenzene to sodium sulfide deviates from 1 due to larger steric hindrance during meta-polymerization: 1, it is difficult to form high molecular weight polymers, even leading to an increased probability of depolymerization and polymerization failure; meanwhile, the content of m-dichlorobenzene is too high, the inter-molecule distance of the polymer is enlarged, and the mechanical property of the material is reduced.
Preferably:
the resin comprises the following raw materials in percentage by mass:
90-95% of polyphenylene sulfide resin A;
5-10% of polyphenylene sulfide resin B;
the molar ratio of the m-dichlorobenzene to the m-dichlorobenzene is 20-40 percent based on 100 percent of the total molar number of the p-dichlorobenzene and the m-dichlorobenzene monomers.
Further preferred is:
the molar ratio of the m-dichlorobenzene to the m-dichlorobenzene is 30-40 percent based on 100 percent of the total molar ratio of the p-dichlorobenzene to the m-dichlorobenzene.
More preferably:
the mass ratio of the polyphenylene sulfide resin A to the polyphenylene sulfide resin B is 90:10;
the molar ratio of the m-dichlorobenzene to the m-dichlorobenzene monomer is 40 percent based on 100 percent of the total molar ratio of the p-dichlorobenzene to the m-dichlorobenzene.
Experiments show that with the continuous optimization of the parameters, the hot rolling/pressing temperature in the paper making process can be controlled in a proper range, and the polyphenylene sulfide fiber paper with high mechanical property and chemical resistance can be prepared.
The preparation method of the polyphenylene sulfide fiber paper specifically comprises the following steps:
the method comprises the steps of A, respectively and independently spinning polyphenylene sulfide resin A and polyphenylene sulfide resin B to obtain polyphenylene sulfide fibers A and polyphenylene sulfide fibers B, dispersing the polyphenylene sulfide fibers A and the polyphenylene sulfide fibers B in water, uniformly mixing to prepare slurry, and preparing the polyphenylene sulfide fiber paper through a wet papermaking process;
or the method B is that the polyphenylene sulfide fiber A is prepared after the polyphenylene sulfide resin A is subjected to melt spinning, the polyphenylene sulfide fiber A and the polyphenylene sulfide resin B are dispersed in water and are uniformly mixed to prepare slurry, and the polyphenylene sulfide fiber paper is prepared through a wet papermaking process.
The melt spinning of the polyphenylene sulfide fiber in the present invention adopts the conventional technical means in the art, including the processes of pelletization, drying, spinning, cooling, winding, drawing, heat setting, etc. (refer to CN100999833a for specific details), and then cutting into the desired length.
In the method A, the spinning extrusion temperature of the polyphenylene sulfide resin A for independent spinning is 290-340 ℃, the heat setting temperature is 150-250 ℃, and the heat setting time is 1-30 s;
the length of the polyphenylene sulfide fiber A is 1-15 mm, and the fineness is 0.5-5.0 dtex.
The spinning extrusion temperature of the polyphenylene sulfide resin B is 180-290 ℃, the heat setting temperature is 150-250 ℃, and the heat setting time is 1-30 s;
the length of the polyphenylene sulfide fiber B is 1-15 mm, and the fineness is 0.5-5.0 dtex.
In the method B, only polyphenylene sulfide resin A is adopted for melt spinning.
The spinning extrusion temperature of the melt spinning is 290-340 ℃, the heat setting temperature is 150-250 ℃, and the heat setting time is 1-30 s;
the length of the polyphenylene sulfide fiber A is 1-15 mm, and the fineness is 0.5-5.0 dtex.
The heat setting time is preferably 1-30 s, and the heat setting temperature is preferably 150-250 ℃; insufficient heat setting temperature and time can cause great heat shrinkage of the fiber, the heat shrinkage is increased at high temperature in the papermaking process, and paper wrinkles and bubbles appear; meanwhile, the fiber breaking strength is not improved, so that the paper strength is lower. The heat setting time and the heat setting temperature are too large, so that energy consumption is wasted, production cost is increased, and downstream use is influenced by fiber hardening.
The fineness of the polyphenylene sulfide short fiber prepared by each method is preferably 0.5-5.0 dtex. When the fineness is less than 0.5dtex, the prepared paper is not stiff enough and the spinneret orifices are too small, so that the processing and cleaning are difficult; when the fineness is more than 5.0dtex, the fiber diameter is too thick, so that the fiber bundles are not easy to be uniformly cooled during spinning, the temperature difference between the inside and the outside of the fiber is large, and the spinning yarn breakage is easy to occur.
Further preferably 1.1dtex and 2.2dtex.
In the process of preparing the polyphenylene sulfide short fibers for papermaking, the curling operation is not needed, the fibers are excessively cohesive by curling, the beating dispersion is not facilitated, the fibers are agglomerated, and the fiber paper with uniform paper surface is difficult to obtain.
The cutting length is preferably 1 to 15mm, more preferably 1 to 7mm. The length is less than 1mm, the fiber paper has insufficient toughness, wear resistance and durability and is easy to break, and the working condition requirement is difficult to meet. Too large a length may cause problems such as uneven paper due to entanglement of fibers.
Preferably, the preparation method of the polyphenylene sulfide fiber paper is preferably a method B, and experiments show that the polyphenylene sulfide fiber paper prepared by the method B has more excellent mechanical properties and chemical resistance.
The wet papermaking process adopts the conventional technical means in the field, including a headbox (defibering pulping), a streaming part, a net part (papermaking forming), a pressing part (dewatering), a drying part (drying), hot rolling strengthening, calendaring, coiling, and the like, and can be specifically referred to as CN101148841A.
The concentration of the fiber slurry after the slurry is mixed in a head box is 0.1 to 10 weight percent, and the production efficiency is low due to the too thin concentration; the concentration is too large, which is unfavorable for uniform dispersion and mixing.
The diameter of the filtering mesh hole of the mesh table part is 14-45 mu m, the mesh hole is too small, the filtering is too slow, and the yield is affected; the meshes are too large, the loss of raw material fibers is large, and the yield is low.
The press section can press the wet sheet to dewater, increasing the sheet tightness. The dryness of the wet paper sheet is controlled to be 20-45%.
The moisture in the wet paper sheet can be removed after the drying part is dried, so that the strength and smoothness of the paper are improved. The dryness of the dried paper sheet is controlled to be 90-96 percent. The dryness is too high, the drying time and the drying temperature are too long, and the subsequent hot rolling waste heat is not fully utilized; the dryness is too low, the paper strength is insufficient, and a large amount of heat is used for evaporating water in paper during hot rolling, so that the hot rolling effect is affected.
The hot rolling strengthening temperature is 160-270 ℃, and the temperature can be fused and bonded without reaching the melting point of the conventional polyphenylene sulfide at 285 ℃ due to the addition of the polyphenylene sulfide resin B or the polyphenylene sulfide fiber B, and the specific temperature can be adjusted according to the property and the proportion of the added polyphenylene sulfide resin B.
Preferably, the temperature of the hot-rolled reinforcement is 160-245 ℃, and more preferably 180-210 ℃.
The smoothness and thickness uniformity of the paper can be improved by calendering, and the calendering pressure is 0.5-5.0 Mpa.
Compared with the prior art, the invention has the following advantages:
the invention discloses a preparation method of polyphenylene sulfide fiber paper, which can treat the fiber paper at a lower hot rolling/hot pressing temperature by reasonable design of a formula on the premise of not adding an adhesive, so that the fiber paper still has excellent bonding performance, and PPS fiber paper with high mechanical property and chemical resistance is prepared. The preparation method saves energy consumption, reduces cost and meets the modern production requirements.
Detailed Description
The present invention will be described in detail with reference to examples for further understanding of the present invention, but the present invention is not limited to these examples, and various modifications and adjustments are not essential to the spirit of the present invention, and remain within the scope of the present invention.
Example 1
Step 1, polymerization: paradichlorobenzene and sodium sulfide were mixed in a 1.1:: polymerization is carried out according to the molar ratio of 1.0, so that the conventional polyphenylene sulfide resin A with the weight average molecular weight of 6 ten thousand is prepared and is marked as a component A;
paradichlorobenzene, m-dichlorobenzene and sodium sulfide were mixed at 0.66:0.44:1 to prepare a polyphenylene sulfide resin B with a weight average molecular weight of 5 ten thousand, which is marked as a component B;
step 2, spinning: the component A is processed by melt spinning to prepare conventional polyphenylene sulfide short fibers; wherein the spinning extrusion temperature is 325 ℃, the heat setting temperature is 250 ℃, the heat setting time is 10s, and the fiber is cut into short fibers with 3mm, and the fineness is 1.11dtex;
step 3, papermaking: 90 parts by weight of conventional polyphenylene sulfide short fibers and 10 parts by weight of polyphenylene sulfide resin B were dispersed in water to form 2wt% slurry, the diameter of the filter mesh of the mesh portion was 24 μm, the dryness of the wet paper sheet after extrusion in the press portion was 30%, the dryness of the dried paper sheet after drying was 93%, the hot-rolling strengthening temperature was set at 180℃and the calendering pressure was 2MPa.
Example 2
The preparation process is essentially the same as in example 1, except that in step 1, the molar ratio of p-dichlorobenzene, m-dichlorobenzene and sodium sulfide is replaced with 0.99:0.11:1, the hot-rolling strengthening temperature was set to 270 ℃.
Example 3
The preparation process was essentially the same as in example 1, except that in step 1, the molar ratio of p-dichlorobenzene, m-dichlorobenzene and sodium sulfide was replaced with 0.88:0.22:1, the hot rolling strengthening temperature is set to 245 ℃.
Example 4
The preparation process was essentially the same as in example 1, except that in step 1, the molar ratio of p-dichlorobenzene, m-dichlorobenzene and sodium sulfide was replaced with 0.77:0.33:1, the hot-rolling strengthening temperature was set to 210 ℃.
Example 5
The preparation process was essentially the same as in example 1, except that in step 1, the molar ratio of p-dichlorobenzene, m-dichlorobenzene and sodium sulfide was replaced with 0.55:0.55:1, the hot-rolling strengthening temperature was set to 165 ℃.
Example 6
The preparation process is essentially the same as in example 1, except that in step 3:
dispersing 80 parts by weight of conventional polyphenylene sulfide short fibers and 20 parts by weight of polyphenylene sulfide resin B in water to form 2wt% slurry;
the hot-rolling consolidation temperature was replaced with 170 ℃.
Example 7
The preparation process is essentially the same as in example 1, except that in step 3:
dispersing 95 parts by weight of conventional polyphenylene sulfide short fibers and 5 parts by weight of polyphenylene sulfide resin B in water to form 2wt% slurry;
the hot-rolled consolidation temperature was replaced with 190 ℃.
Example 8
The preparation process is substantially the same as in example 1, except that:
in step 1, the molar ratio of p-dichlorobenzene, m-dichlorobenzene and sodium sulfide was replaced with 0.55:0.55:1, a step of;
in step 3: dispersing 80 parts by weight of conventional polyphenylene sulfide short fibers and 20 parts by weight of polyphenylene sulfide resin B in water to form 2wt% slurry;
the hot-rolling consolidation temperature was replaced with 160 ℃.
Example 9
Step 1 is exactly the same as in example 1;
step 2, spinning: and (3) independently melt-spinning the polyphenylene sulfide resin A and the polyphenylene sulfide resin B.
The spinning extrusion temperature of the polyphenylene sulfide resin A is 325 ℃, the heat setting temperature is 250 ℃, the heat setting time is 10s, and the polyphenylene sulfide resin A is cut into polyphenylene sulfide fibers A with fineness of 1.11dtex and length of 3 mm;
the polyphenylene sulfide resin B was spun separately at a spinning extrusion temperature of 225℃and a heat setting temperature of 160℃for 10s, and was cut into polyphenylene sulfide fibers B having a fineness of 1.11dtex and a length of 3 mm.
Step 3, papermaking: 90 parts by weight of polyphenylene sulfide fibers A and 10 parts by weight of polyphenylene sulfide fibers B were dispersed in water to form a 2wt% slurry, the diameter of the filter mesh of the mesh portion was 24. Mu.m, the dryness of the wet paper sheet after extrusion in the press portion was 30%, the dryness of the dried paper sheet after drying was 93%, the hot-rolled reinforcing temperature was set at 180℃and the calendering pressure was 2MPa.
Comparative example 1
Step 1, polymerization: polymerizing paradichlorobenzene and sodium sulfide according to a molar ratio of 1.1:1.0 to prepare a conventional polyphenylene sulfide resin A (component A) with a weight average molecular weight of 6 ten thousand;
step 2, spinning: the component A is processed by melt spinning to prepare conventional polyphenylene sulfide short fibers; wherein the spinning extrusion temperature is 325 ℃, the heat setting temperature is 250 ℃, the heat setting time is 10s, and the polyphenylene sulfide fiber A with the length of 3mm and the fineness of 1.11dtex is cut into the polyphenylene sulfide fiber A;
step 3, papermaking: 100 parts by weight of conventional polyphenylene sulfide fiber A was dispersed in water to form 2wt% slurry, the diameter of the filter mesh of the mesh portion was 24. Mu.m, the dryness of wet paper sheet after extrusion in the press portion was 30%, the dryness of dry paper sheet after drying was 93%, the hot-rolled reinforcing temperature was set to 295℃and the calendering pressure was 2MPa. In the test, when the calendering pressure is 2MPa and the hot rolling strengthening temperature is lower than 260 ℃, the surface of the prepared fiber paper has cracking and has poor mechanical property.
Comparative example 2
Step 1, polymerization: polymerizing paradichlorobenzene and sodium sulfide according to a molar ratio of 1.1:1.0 to prepare a conventional polyphenylene sulfide resin A (component A) with a weight average molecular weight of 6 ten thousand;
step 2, spinning: the component A is processed by melt spinning to prepare conventional polyphenylene sulfide short fibers; wherein the spinning extrusion temperature is 325 ℃, the heat setting temperature is 250 ℃, the heat setting time is 10s, and the fiber is cut into short fibers with 3mm, and the fineness is 1.11dtex;
step 3, papermaking: 95 parts by weight of conventional polyphenylene sulfide short fibers and 5 parts by weight of polyvinyl alcohol (binder) were dispersed in water to form 2wt% slurry, the diameter of the filter mesh of the mesh portion was 24 μm, the dryness of wet paper sheet after extrusion in the press portion was 30%, the dryness of dry paper sheet after drying was 93%, the hot-rolling strengthening temperature was set to 180 ℃, and the calendering pressure was 2MPa.
The polyphenylene sulfide fibers prepared in the spinning steps of the above examples and comparative examples, respectively, and the finally prepared polyphenylene sulfide fiber paper were subjected to performance tests, and the test data are shown in tables 1 to 2 below.
TABLE 1
Note that: the acid and alkali resistance strength retention rate of the polyphenylene sulfide fiber paper is calculated by referring to the acid and alkali experimental conditions of FZT 52017-2011 and then testing the strength ratio of acid and alkali treatment to acid and alkali treatment according to GB/T1040.3.
TABLE 2
The foregoing is merely a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and the present invention is described by using the specific examples, which are only for aiding in understanding the present invention, and are not limited thereto. Several simple deductions, variations, substitutions or combinations may also be made by those skilled in the art to which the invention pertains based on the inventive concept. Such deductions, modifications, substitutions or combinations are also within the scope of the claims of the present invention.
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| CN120096172A (en) * | 2025-05-07 | 2025-06-06 | 烟台民士达先进制造有限公司 | Oil-resistant and hydrolysis-resistant electrical insulating composite material and preparation method and application thereof |
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| CN101148841A (en) * | 2006-09-18 | 2008-03-26 | 四川得阳化学有限公司 | Method for manufacturing high-performance polyphenylene sulfide fibre paper |
| CN109235116A (en) * | 2018-09-07 | 2019-01-18 | 卜沈宝 | The manufacturing process of NEW TYPE OF COMPOSITE paper |
| CN110295402A (en) * | 2019-06-11 | 2019-10-01 | 宜宾天原集团股份有限公司 | A kind of preparation method of polyphenylene sulfide fibre |
| CN114232379A (en) * | 2021-11-29 | 2022-03-25 | 大连工业大学 | A kind of preparation method of high-performance polyphenylene sulfide fiber paper |
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