WO2024125507A1 - Dispositif et procédé de préparation de non-tissé hydrolié de fibres d'alumine continues - Google Patents

Dispositif et procédé de préparation de non-tissé hydrolié de fibres d'alumine continues Download PDF

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Publication number
WO2024125507A1
WO2024125507A1 PCT/CN2023/138157 CN2023138157W WO2024125507A1 WO 2024125507 A1 WO2024125507 A1 WO 2024125507A1 CN 2023138157 W CN2023138157 W CN 2023138157W WO 2024125507 A1 WO2024125507 A1 WO 2024125507A1
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WIPO (PCT)
Prior art keywords
spunlace
alumina fiber
paper
continuous alumina
spinneret
Prior art date
Application number
PCT/CN2023/138157
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English (en)
Chinese (zh)
Inventor
关克田
孙树人
Original Assignee
上海榕融新材料技术有限公司
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Priority claimed from CN202211603558.XA external-priority patent/CN115787197B/zh
Priority claimed from CN202223361142.XU external-priority patent/CN219079791U/zh
Application filed by 上海榕融新材料技术有限公司 filed Critical 上海榕融新材料技术有限公司
Publication of WO2024125507A1 publication Critical patent/WO2024125507A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/002—Inorganic yarns or filaments
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet

Definitions

  • the invention relates to a device and a process for preparing continuous alumina fiber spunlace paper, belonging to the technical field of textile materials.
  • Alumina fiber is a high-performance ceramic fiber with high tensile strength, elastic modulus and good electrical insulation properties. It can maintain good chemical stability in an oxidizing atmosphere. It also has the advantages of low thermal conductivity, low thermal expansion coefficient and good thermal shock resistance. It is mainly used in refractory materials, structural reinforcement materials and environmental protection recycling fields.
  • Alumina fiber paper has lightweight and excellent high temperature resistance.
  • fiber paper can be cut into various shapes and used to make flange gaskets or other high-temperature insulation fields. Its molding process is generally to chop the alumina fibers, beat them, add corresponding binders and dispersants in the process, and finally form them.
  • this kind of alumina fiber paper formed by short fibers and binders has poor surface flatness, high surface density, and lacks continuous fibers. When stretched by external force, it is easy to cause the short fibers to break and fail and the binder to debond. The molding strength is insufficient, which affects the subsequent practical application.
  • the alumina fiber paper formed by short-cut fibers and binders has poor surface flatness, high surface density, and lacks continuous fibers.
  • the short-cut fibers are easily broken and the binder debonds.
  • the molding strength is insufficient, affecting subsequent practical applications.
  • Alumina fibers have problems such as high brittleness and low elongation, which makes it difficult to prepare continuous alumina fiber paper.
  • the present invention provides a device and process for preparing continuous alumina fiber spunlace paper.
  • the present invention adopts a prepolymerization method to prepare alumina continuous fibers, and uses a spunlace process to reduce damage to the fibers.
  • the preparation of continuous alumina fiber paper is achieved by controlling the drying temperature to meet the performance requirements of ultra-lightness and high tensile strength.
  • the first object of the present invention is to provide a continuous alumina fiber spunlace paper preparation device, comprising a storage tank, the storage tank is connected to a spinneret through a pipeline, a drafter is arranged below the spinneret, a plurality of spinneret holes are arranged in the spinneret, and the material in the storage tank passes through the plurality of spinneret holes of the spinneret and enters the drafter for drafting; a negative pressure suction fan is arranged below the drafter, a mesh belt is arranged between the drafter and the negative pressure suction fan, and a mesh belt is arranged below the mesh belt
  • a conveyor belt is provided, and a high-temperature furnace, a water spunlacing machine and a drying machine are arranged on one side of the stretching device.
  • the conveyor belt drives the mesh belt between the stretching device and the negative pressure suction fan to pass through the high-temperature furnace, the water spunlacing machine and the drying machine in sequence.
  • a plurality of water jet heads are arranged in the water jet machine, and the plurality of water jet heads are located at the upper and lower ends of the mesh belt.
  • the storage tank is connected to a screw extruder, and the screw extruder is used to transport the material in the storage tank to the spinneret through the pipeline.
  • a safety valve and a metering pump are provided on the pipeline; a winding device is provided at the end of the conveyor belt, and the winding device is used to wind up the prepared continuous alumina fiber paper.
  • the second object of the present invention is to provide a process for preparing continuous alumina fiber spunlace paper, wherein the process adopts the continuous alumina fiber spunlace paper preparation device, and comprises the following steps:
  • a prepolymerization method is used to polymerize aluminoxane polymer and water as raw materials to form aluminoxane compound, which is dissolved in an organic solvent and then silicate is added to prepare a blended material that can be used for spinning;
  • step (2) The blended material prepared in step (1) is conveyed to a metering pump through a screw extruder to reach a spinneret, spun by the spinneret, formed in a drafter, and dried to obtain alumina fiber filaments, which are sucked into a mesh belt by a negative pressure suction fan at the bottom of the device to form a net;
  • the fibers formed into a web in step (2) are transported to a high-temperature furnace via a conveyor belt for sintering, and then transported to a spunlacing machine via a conveyor belt for spunlacing, and then dried to obtain continuous alumina fiber paper, and finally rolled up using a winding device to obtain a finished product.
  • the aluminoxane polymer in step (1) is alkyl aluminum, the silicate is silicate, and the organic solvent is ether.
  • the screw speed of the screw extruder described in step (2) is 70-100 rpm; the diameter of the spinneret hole is 0.5-0.8 mm; the speed of the metering pump described in step (2) is 0.1-0.3 r/min; the stretching tension of the stretcher described in step (2) is controlled between 10-15 N; the speed of the negative pressure suction fan described in step (2) is 500-700 r/min; the negative pressure is 200-300 Pa; the length of the alumina fiber filament described in step (2) is 13-18 cm; the drying temperature described in step (2) is 120-140 ° C.
  • the conveyor belt speed in step (3) is 0.6-1 m/min; the sintering temperature in step (3) is 1000-1300°C.
  • the thickness of the continuous alumina fiber paper in step (3) is 0.1-0.5 mm; the surface density is 30-40 g/m 2 ; and the winding speed in step (3) is 0.6-1 m/min.
  • the number of the water jet heads in step (3) is 7-12, the water jet pressure is 60-120 Bar, the water jet distance is 10-15 mm, the water jet diameter is 1-2 mm, and the water jet density is 20-30 thorns/cm 2 ; the water jet in step (3) The process is front and back water spunlace; the drying temperature of step (3) is 100-110°C.
  • the present invention adopts a prepolymerization method and a continuous fiber forming device.
  • the prepared alumina fiber filaments are not easy to break and are 20% longer than ordinary alumina filaments.
  • Continuous alumina fiber paper can be prepared.
  • the hydroentanglement process adopted in the present invention is simple and convenient.
  • a plurality of hydroentanglement heads are arranged in the hydroentanglement machine.
  • the plurality of hydroentanglement heads are located at the upper and lower ends of the mesh belt. Hydroentanglement on both sides ensures that both sides of the continuous alumina fiber paper have good flatness, causes less damage to the continuous alumina fibers, introduces less impurities during the hydroentanglement process, and has a smooth surface after hydroentanglement on both sides.
  • the tensile strength of the continuous alumina fiber paper prepared by the present invention is increased by more than 38.7%; due to the lack of short fiber binder, the surface density can be reduced by 13.2%, achieving an ultra-light and thin effect, which can avoid the short-cut fiber breakage and failure and binder debonding caused by external tension, and has high molding strength without affecting subsequent practical applications.
  • the pipeline of the present invention is provided with a safety valve and a metering pump, which can observe and adjust the capacity and flow rate of the material in the pipeline at any time.
  • the present invention adjusts the internal temperature of the stretcher to dry it, thereby ensuring that the precursor alumina fiber is stably formed; the continuous alumina fiber filaments are pulled through the mesh inside the stretcher, thereby ensuring that the continuous alumina fiber filaments pass stably.
  • the negative pressure of the negative pressure suction fan of the present invention causes the continuous alumina fiber filaments at the bottom of the stretcher to be cut off and fall into the mesh belt to be gradually laid into a mesh, and then transported to a high-temperature furnace for sintering via a conveyor belt.
  • the drying machine provided in the present invention can effectively remove the moisture brought by the spunlacing machine.
  • FIG1 is a schematic structural diagram of a device for preparing continuous alumina fiber spunlace paper according to the present invention
  • FIG2 is a schematic diagram showing the positional relationship between the spunlacing head and the continuous alumina fiber paper in the spunlacing machine of the present invention
  • FIG3 is a flow chart of a process for preparing continuous alumina fiber spunlace paper according to the present invention.
  • connection should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them.
  • a first feature being “above”, “above” and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.
  • a first feature being “below”, “below” and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
  • this embodiment provides a continuous alumina fiber spunlace paper preparation device, including a storage tank 1, the storage tank 1 is connected to a spinneret 15 through a pipeline, a stretcher 5 is arranged below the spinneret 15, and a plurality of spinneret holes are arranged in the spinneret 15.
  • the material in the storage tank 1 passes through the plurality of spinneret holes of the spinneret 15 and enters the stretcher 5 for stretching to form continuous alumina fiber 4 filaments; a negative pressure suction fan 6 is arranged below the stretcher 5, a mesh belt 13 is arranged between the stretcher 5 and the negative pressure suction fan 6, a conveyor belt 14 is arranged below the mesh belt 13, a high-temperature furnace 7, a spunlace machine 8 and a dryer 9 are arranged on one side of the stretcher 5, and the conveyor belt 14 drives the mesh belt 13 between the stretcher 5 and the negative pressure suction fan 6 to pass through the high-temperature furnace 7, the spunlace machine 8 and the dryer 9 in sequence.
  • the water jetting machine 8 is provided with a plurality of water jetting heads 11, which are located at the upper and lower ends of the mesh belt 13, and water jetting the front and back sides of the continuous aluminum oxide fiber paper 12 to ensure that both sides have good flatness.
  • the continuous aluminum oxide fiber paper 12 is located above the mesh belt 13, and the mesh belt 13 is located above the conveyor belt 14.
  • One row of the plurality of water jetting heads 11 is located above the continuous aluminum oxide fiber paper 12, facing the front side of the continuous aluminum oxide fiber paper 12; another row of the plurality of water jetting heads 11 is located inside the conveyor belt 14, facing the back side of the continuous aluminum oxide fiber paper 12. Since mesh holes are provided on the mesh belt 13 and the conveyor belt 14, the water jetting heads 11 located below the continuous aluminum oxide fiber paper 12 can also water jetting the back side of the continuous aluminum oxide fiber paper 12.
  • the storage tank 1 is connected to a screw extruder (not shown in FIG. 1 ), and the screw extruder is used to transport the material in the storage tank 1 to the spinneret 15 through the pipeline.
  • the screw speed of the screw extruder is 70-100 rpm.
  • the pipeline is provided with a safety valve 2 and a metering pump 3, which can observe and adjust the capacity and flow rate of the material in the pipeline at any time.
  • the speed of the metering pump is 0.1-0.3r/min;
  • the safety valve 2 is a solenoid valve or an electric valve.
  • a winding device 10 is provided at the end of the conveyor belt 14, and the winding device 10 is used to wind up the prepared continuous alumina fiber paper 12.
  • the winding device 10 is a roller.
  • the diameter of the spinneret hole is 0.5-0.8 mm.
  • the stretching tension of the stretcher 5 is controlled between 10-15N.
  • the rotation speed of the negative pressure suction fan 6 is 500-700r/min; the negative pressure is 200-300Pa.
  • the conveyor belt speed is 0.6-1 m/min.
  • the number of the water jet heads is 7-12, the water jet pressure is 60-120 Bar, the water jet distance is 10-15 mm, the water jet diameter is 1-2 mm, and the water jet density is 20-30 thorns/cm 2 .
  • the thickness of the continuous alumina fiber paper 12 is 0.1-0.5 mm.
  • this embodiment provides a process for preparing continuous alumina fiber spunlace paper, and the process adopts a continuous alumina fiber spunlace paper preparation device provided in Example 1, and comprises the following steps:
  • a prepolymerization method is used to polymerize aluminoxane polymer and water as raw materials to form aluminoxane compound, which is dissolved in an organic solvent and then silicate is added to prepare a blended material that can be used for spinning;
  • step (2) conveying the blended material prepared in step (1) to a metering pump through a screw extruder to a spinneret, spinning the blended material through the spinneret, forming the blended material in a drafter, and drying the blended material to obtain alumina precursor fiber filaments, which are then sucked into a mesh belt by a negative pressure suction fan at the bottom of the device to form a mesh;
  • the fibers formed into a web in step (2) are transported to a high-temperature furnace via a conveyor belt for sintering, and then transported to a spunlacing machine via a conveyor belt for spunlacing, and then dried to obtain continuous alumina fiber paper, and finally rolled up using a winding device to obtain a finished product.
  • the aluminoxane polymer in step (1) is alkyl aluminum, the silicate is silicate, and the organic solvent is ether;
  • the screw speed of the screw extruder in step (2) is 70-100 rpm, more preferably 90 rpm;
  • the spinneret hole in step (2) has a diameter of 0.5-0.8 mm;
  • the speed of the metering pump in step (2) is 0.1-0.3 r/min;
  • the stretching tension of the stretcher in step (2) is controlled between 10-15N;
  • the speed of the negative pressure suction fan in step (2) is 500-700 r/min; the negative pressure is 200-300 Pa;
  • the length of the alumina fiber filaments in step (2) is 13-18 cm;
  • the drying temperature in step (2) is 120-140°C; more preferably 130°C;
  • the conveyor belt speed in step (3) is 0.6-1 m/min;
  • the sintering temperature in step (3) is 1000-1300° C.
  • the number of the water jet heads in step (3) is 7-12, the water jet pressure is 60-120 Bar, the water jet distance is 10-15 mm, the water jet diameter is 1-2 mm, and the water jet density is 20-30 thorns/cm 2 ;
  • the spunlace process in step (3) is front and back spunlace
  • the drying temperature in step (3) is 100-110°C, more preferably 105°C;
  • the continuous alumina fiber paper in step (3) has a thickness of 0.1-0.5 mm and a surface density of 30-40 g/m 2 ;
  • the winding speed in step (3) is 0.6-1 m/min;
  • Alkylaluminum and water are used as raw materials to polymerize aluminoxane compounds, which are dissolved in ether solvents, and then silicates are added to make viscous blended materials that can be used for spinning.
  • the blended materials are loaded into the storage tank, the machine is turned on, and the screw extruder starts to run at a speed of 70rpm.
  • the blended materials begin to pass through the safety valve to the metering pump, and the metering pump speed is 0.3r/min.
  • the spinneret hole diameter is adjusted to 0.05mm, and the material is waited to be ejected from the spinneret hole.
  • the continuous alumina fiber filament is pulled through the mesh inside the drafter, and the tension is controlled between 10-15N to ensure the continuous alumina fiber filament passes stably.
  • the negative pressure suction fan adjusts the speed of the negative pressure suction fan to 500r/min, and the negative pressure to 200Pa. Due to the negative pressure, the continuous alumina fiber filaments at the bottom of the drafter are cut off and fall into the mesh belt to gradually form a mesh. Adjust the conveyor belt speed to 0.6m/min and transport it to the high temperature furnace for sintering.
  • the temperature in the high-temperature furnace is adjusted to 1000°C, and the layered mesh precursor continuous alumina fiber conveyed by the conveyor belt is sintered and formed, and then sent to the spunlace machine via the conveyor belt.
  • the number of spunlace heads is adjusted to 12, the spunlace pressure is 100Bar, the spunlace distance is 10mm, the spunlace diameter is 1mm; the spunlace density is 25 thorns/ cm2 , and the front and back sides are spunlace to ensure that both sides have good flatness.
  • the spunlace is completed, it is conveyed to the dryer, and the temperature of the dryer is adjusted to 105°C to remove the moisture caused by the spunlace process. Finally, it is rolled up by the winding device at a speed of 1m/min.
  • Alkylaluminum and water are used as raw materials to polymerize aluminoxane compounds, which are dissolved in ether solvents, and then silicates are added to make viscous blended materials that can be used for spinning.
  • the blended materials are loaded into the storage tank, the machine is turned on, and the screw extruder starts to run at a speed of 70rpm.
  • the blended materials begin to pass through the safety valve to the metering pump, and the speed of the metering pump is 0.3r/min. Adjust the spinneret hole diameter to 0.05 mm and wait for the material to be ejected from the spinneret hole.
  • the continuous alumina fiber filament is pulled through the mesh inside the drafter, and the tension is controlled between 10-15N to ensure the continuous alumina fiber filament passes stably.
  • the negative pressure suction fan adjusts the speed of the negative pressure suction fan to 500r/min, and the negative pressure to 200Pa. Due to the negative pressure, the continuous alumina fiber filaments at the bottom of the drafter are cut off and fall into the mesh belt to gradually lay into a mesh. Adjust the conveyor belt speed to 1m/min and transport it to the high-temperature furnace for sintering.
  • the temperature in the high-temperature furnace is adjusted to 1000°C, and the layered mesh precursor continuous alumina fiber conveyed by the conveyor belt is sintered and formed, and then sent to the spunlace machine via the conveyor belt.
  • the number of spunlace heads is adjusted to 12, the spunlace pressure is 100Bar, the spunlace distance is 10mm, and the spunlace diameter is 1mm; the spunlace density is 30 thorns/ cm2 , and the front and back sides are spunlace to ensure that both sides have good flatness.
  • the spunlace is completed, it is conveyed to the dryer, and the temperature of the dryer is adjusted to 105°C to remove the moisture caused by the spunlace process. Finally, it is rolled up by the winding device at a speed of 1m/min.
  • the speed of the negative pressure suction fan in Example 3 is adjusted to 700r/min, and the negative pressure is adjusted to 300Pa, and the others remain unchanged.
  • the length of the alumina fiber filaments is controlled to be between 10-13cm to form alumina fiber filaments with shorter lengths.
  • the conveyor belt speed is adjusted to 1.2m/min, and it is hydroentangled to obtain 0.5mm continuous oxidized fiber spunlace paper and the continuous alumina fiber spunlace paper prepared in Example 3 for tensile breaking strength comparison.
  • the specific test refers to the international standard ISO 9073-3-1989 "Textiles-Test methods for non-woven fabrics-Part 3: Determination of tensile strength and elongation" method to determine the tensile breaking strength of non-woven fabrics.
  • the comparison results of the tensile breaking strength of the 0.5mm continuous oxidized fiber spunlace paper obtained in Comparative Example 1 and the continuous alumina fiber spunlace paper prepared in Example 3 are shown in Table 1 below:
  • the short-cut alumina fiber paper purchased from Suzhou Alsay Inorganic Materials Co., Ltd. has a specification of 900*600*2mm and is the same as the implementation Example 4 compares the tensile strength, and the comparison results are shown in Table 2 below:
  • the tensile breaking strength of continuous alumina fiber spunlace paper is 38.7% higher than that of the short-cut alumina fiber paper currently on the market. This is because the mechanical properties of continuous alumina fiber filaments are better than those of short-cut fibers. With the superposition of fiber layers, the overall mechanical properties of alumina fiber paper are enhanced.
  • the overall surface density of continuous alumina fiber spunlace paper is 13.2% lower than that of short-cut alumina fiber paper currently on the market. This is because short-cut alumina fiber paper is not formed by alumina fibers in an integrated manner, and also includes binders and other impurities.
  • Continuous alumina fiber spunlace paper is made of continuous fiber layers, and the interlayer toughness is increased by a spunlace process. The whole is composed of alumina fibers. Therefore, the continuous alumina fiber spunlace paper is less dense and has an ultra-light and thin effect.
  • Example 3 The spunlace process parameters in Example 3 were adjusted to adjust the spunlace pressure to 90 Bar, the spunlace diameter to 1.5 mm, the spunlace density to 20 spunlaces/cm 2 , and the other parameters remained the same as in Example 3 to obtain a 0.5 mm thick continuous alumina fiber spunlace paper.
  • the tensile strength test was compared with that of Example 3 according to the test standard of Comparative Example 1.
  • Example 3 The spunlace process parameters in Example 3 were adjusted to adjust the spunlace pressure to 110 Bar, the spunlace diameter to 0.6 mm, the spunlace density to 30 thorns/cm 2 , and the others remained the same as in Example 3 to obtain a continuous alumina fiber spunlace paper with a thickness of 0.5 mm.
  • the tensile strength test was compared with that of Example 3 according to the test standard of Comparative Example 1.
  • the tensile strength test comparison results of the continuous alumina fiber spunlace paper obtained in Example 3, Comparative Examples 3 and Comparative Examples 4 are shown in Table 3 below:
  • Comparative Example 3 decreased by 12.3% compared with Example 3, mainly because the spunlace diameter was increased and the spunlace density was reduced in Comparative Example 3.
  • the larger spunlace diameter caused greater damage to the alumina fiber, the smaller spunlace density, the fewer fibers in the vertical direction, and the insufficient strength between the alumina fiber paper layers. The combination of these two factors led to a decrease in its tensile breaking strength.
  • Comparative Example 4 Compared with Example 3, the strength of Comparative Example 4 decreased by 9.4%, mainly because of the increased spunlace pressure and spunlace density. The increased spunlace pressure will increase the damage to the alumina fibers, but since the spunlace diameter is reduced to 0.6mm, the damage to the fibers is less than that of Comparative Example 3. As the spunlace density increases, the number of alumina fibers introduced between the layers increases, and the damage to the alumina fibers also increases. Under a combination of various factors, the tensile breaking strength of Comparative Example 4 is slightly lower than that of Comparative Example 1, but the decline is milder than that of Comparative Example 4.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Fibers (AREA)

Abstract

La présente invention relève du domaine technique des matières textiles. Un dispositif et un procédé de préparation de non-tissé hydrolié de fibres d'alumine continues sont décrits. Le dispositif comprend un réservoir de stockage ; le réservoir de stockage est relié à une matrice de filage au moyen d'un tuyau ; un dispositif d'étirage est disposé au-dessous de la matrice de filage ; un ventilateur d'aspiration à pression négative est disposé au-dessous du dispositif d'étirage ; une bande à mailles est disposée entre le dispositif d'étirage et le ventilateur d'aspiration à pression négative ; une bande transporteuse entraîne la bande à mailles entre le dispositif d'étirage et le ventilateur d'aspiration à pression négative pour passer successivement à travers un four à haute température, une machine d'hydroliage et un séchoir. Les filaments de fibre d'alumine préparés par la présente invention sont moins susceptibles de se rompre, et ont des longueurs de 20 % supérieures à celles des filaments d'alumine courants. Le procédé d'hydroliage est simple et pratique, provoque moins de dommages aux fibres d'alumine continues, implique peu d'impuretés pendant le processus d'hydroliage, et produit des surfaces plates et lisses par hydroliage pour la face avant et la face arrière. La résistance à la traction des fibres d'alumine continues préparées est supérieure de 38,7 % ou plus à celle du papier à fibres coupées courant. Du fait de l'absence d'un liant à fibres courtes, la densité de surface peut être réduite de 13,2 %, ce qui permet d'obtenir l'effet ultra-mince.
PCT/CN2023/138157 2022-12-13 2023-12-12 Dispositif et procédé de préparation de non-tissé hydrolié de fibres d'alumine continues WO2024125507A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202211603558.XA CN115787197B (zh) 2022-12-13 2022-12-13 一种连续氧化铝纤维水刺纸制备装置及工艺
CN202223361142.XU CN219079791U (zh) 2022-12-13 2022-12-13 一种连续氧化铝纤维水刺纸制备装置
CN202223361142.X 2022-12-13
CN202211603558.X 2022-12-13

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