CN102505347A - Method for preparing microporous fiber nonwovens by applying supercritical fluid melt-blowing and spinning - Google Patents
Method for preparing microporous fiber nonwovens by applying supercritical fluid melt-blowing and spinning Download PDFInfo
- Publication number
- CN102505347A CN102505347A CN2011103339502A CN201110333950A CN102505347A CN 102505347 A CN102505347 A CN 102505347A CN 2011103339502 A CN2011103339502 A CN 2011103339502A CN 201110333950 A CN201110333950 A CN 201110333950A CN 102505347 A CN102505347 A CN 102505347A
- Authority
- CN
- China
- Prior art keywords
- melt
- supercritical fluid
- polymer
- homogeneous phase
- microporous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention provides a method for preparing microporous fiber nonwovens by applying supercritical fluid melt-blowing and spinning. The method comprises the following steps: after quantitatively feeding polymer solid chips into a screw rod, ramming and gradually melting the polymer solid chips by virtue of a screw rod compression segment; injecting supercritical fluid into polymer melts by virtue of an injection device so as to form homogeneous phase polymer melts; filtering the homogeneous phase polymer melts by virtue of a filter medium so as to eliminate impurities and residual catalysts after polymerization; extruding the homogeneous phase polymer melts from a die head spinneret orifice after the homogeneous phase polymer melts pass through a melt-blowing die head entrance region, an orifice flow region and a bulking region; forming polymer superfine microporous fibers; and blowing the superfine microporous fibers prepared by drafting, cooling and curing to a condensing net curtain or roller under the action of drafting airflow, wherein a vacuum suction device is arranged on the lower part of the condensing net curtain or the interior of the roller, and the fibers are collected on the condensing net curtain or roller and become the microporous fiber nonwovens by virtue of self thermal bonding or other reinforcing methods.
Description
Technical field
The present invention relates to a kind of supercritical fluid of using and melt and spray the method that spinning prepares the microporous fibre non-weaving cloth.
Technical background
The development of melt-blowing nonwoven production technology and the expansion of product applications have promoted the use of high-performance polymer; Satisfying the special demands of fabrics for industrial use, as high temperature resistant, chemical resistance, good intensity and elasticity, medical product comfort, with the requirements such as security of Food Contact.Except that using conventional polypropylene PP, polyester PET, copolyester COPET, polythene PE, polyamide PA, copolyamide COPA, elastic polyester PBT, elastic polyester PTT, some high performance fiber-forming polymers also are able to use in the melt-blowing nonwoven product.Like polyacetal copolymer (POM), cyclic polyolefin hydrocarbon copolymer (COC), thermoplastic polyester elastomer (TPE – E), polyphenylene sulfide (PPS) etc.Because the fiber in the melt-blowing nonwoven belongs to superfine fibre, in light weight, soft, warmth retention property is good, the space is little between meltblown fibers simultaneously, and the big gas permeability of voidage is very superior, and this has just determined that meltblown fibers is very excellent insulation material.Melt-blowing nonwoven is because its fibre diameter is thin, specific area is big, hole is little, and characteristics such as voidage height extremely are fit to do the filtering material of liquid-solid separation or gas-solid separation.In air filtration, can be fit to do inferior filtration more than efficient.Like labour protection and medical mouth mask, breathing mask; Deleterious particle such as filtering dust, bacterium; Also can do that air-conditioning, automobile inner air filter and engine air filters, especially when meltblown fibers after the electret processing, airfiltering filter efficiency can be above 99%; Even can reach 99.999%, can be fit to do the air cleaning place of high requests such as electronic equipment ultra-clean workshop.The melt-blowing nonwoven strong detergency, soft, do not damage the surface of being cleaned, market capacity is huge.The enterprise that abroad has makes the baby with meltblown fibers and wipes individual suitable application areas such as cloth, home-use cloth for wiping or dusting, personal wipe, melts and sprays to wipe cloth and also can be used for industrial application such as automobile wipe, precision machine tool, precision instrument cloth for wiping or dusting.
The basic conception of microporous polymer is to propose professor Suh by Massachusetts Institute Technology in 1980.His basic imagination be if abscess-size less than the critical crack size that had existed already in the polymeric material; The abscess that then can add enough numbers; Make density of material reduce and don't can lose the mechanical property of necessity, thereby reach the purpose that reduces cost, improves the material price ratio.Research shows; Microporous polymer has good physical and mechanical properties, like notched Izod impact strength high (compare with pure plastics the highest improve 5 times), toughness high (compare with pure plastics the highest improve 5 times), specific strength high (higher 3～5 times than pure plastics), fatigue life long (can improve 5 times than pure plastics), heat endurance is high, dielectric constant is low and thermal conductivity factor is low etc.Thereby can be used for making surface modifying material and the biomedical articles etc. of aircraft and the automobile component of packaging material for food, high-strength light sound insulation, in light weight, the sports equipment that resiliency is strong, the fibrous material of insulation insulation, low friction.The a large amount of use harmful CFC (freon) of ozone layer and inflammable hydrocarbon etc. in conventional foam plastics physical blowing as physical blowing agent; And when supersaturation manufactured microporous polymer, adopt nuisanceless, as to be prone to recovery CO2 and N2 as blowing agent; Meet the requirement of current environmental protection science and technology, thereby microporous polymer also is called as " new material of 21st century ".
Supercritical fluid both had been different from gas, also was different from liquid, and have the physicochemical properties of many uniquenesses: it has the density of liquid of approaching, and this gives its very strong solvability; Its viscosity and gas are approaching, and diffusion coefficient is bigger than liquid, thereby have excellent mass transferring performance.Through changing the temperature or the pressure of supercritical fluid, can obtain being in the arbitrary density between gaseous state and the liquid state; Near critical point, the minor variations of pressure and temperature can cause the great variety of density.Because viscosity, dielectric constant, diffusion coefficient are all relevant with density with solvability, therefore can regulate the physicochemical properties that pressure and temperature is controlled supercritical fluid easily.Compare with other materials, C02 critical condition suit (31.1 ℃, Pc=7.38 MPa), easy operating, and its cheaply be easy to get, nontoxicly do not fire, chemical property is stable, safe in utilization, so the application of overcritical C02 fluid is maximum in numerous supercritical fluids.Though for most polymers, supercritical carbon dioxide (SCCO2) is a poor solvent, it can dissolve many micromolecule, and it has very strong swellability to polymer.In recent years, the application of relevant not weaving fabric of superfine fiber is extensive day by day, as the separation of the processing of industrial wastewater, desalinization, compounding substances with concentrate, the separating and recovery etc. of Industrial Metal.Along with rapid development of science and technology, microporous foam technology, supercritical fluid technique and non-weaving cloth technology cross coupled are had complementary advantages, with CO
2Be applied in the preparation of fiber, make it initiatively, obtained some great breakthroughs by passive change.Its basic principle is: 1. polymer is under high pressure saturated by inert gas (CO2), forms the polymer gas homogeneous system; 2. through decompression or intensification, reduce the solubility of gas in polymer, produce the over-saturation state; 3. bubble nucleating, grow up and finalize the design.The micropore finger-hole directly is 0.01 ~ 50um, hole density 10
9~ 10
13Hole/cm
3, therefore, contain the microporous fibre non-weaving cloth and have and have a few: light weight, material-saving, absorption shock loading are strong, sound insulation and characteristics such as heat-proof quality is good, specific strength height.Because the intensity of fiber is big, therefore, has the microcellular structure fiber non-woven and special using value is arranged simultaneously at the medical field and the fields such as automobile, aircraft and various transportation equipments that make.
Through changing the temperature or the pressure of supercritical fluid, can obtain being in the arbitrary density between gaseous state and the liquid state; Near critical point, the minor variations of pressure and temperature can cause the great variety of density.Because viscosity, dielectric constant, diffusion coefficient are all relevant with density with solvability, therefore can regulate the physicochemical properties that pressure and temperature is controlled supercritical fluid easily.The preparation of microporous polymer is mainly based on gas supersaturation method.Basic process is: gases at high pressure (CO2 and N2) are dissolved in form the saturated system of polymer/gas in the polymer; Then through pressure drop with (or) temperature rises sharply and makes it to get into hypersaturated state, thereby a large amount of gas nuclear causes simultaneously and increases; Make the microcellular structure typing through methods such as quenchings at last.The improvement of conventional foam plastics physical blowing is technological parameters such as strict control temperature, pressure, time, makes a large amount of gas nuclear energy cause enough simultaneously, and not merger becomes bulla, thereby obtains microcellular structure.Adopt the supersaturation principle to prepare the process of microporous polymer, according to the continuous degree difference of operation mainly contain the method for fractional steps, semi-continuous process and extrude, continuity methods such as injection moulding, rotational moulding.The method of fractional steps and semi-continuous process are determined by the diffusion velocity of gas to polymeric matrix owing to forming the saturated system required time of polymer/gas, thereby length consuming time, can't satisfy industrial needs, are mainly used in theoretical research.And with the appearance of the corresponding to continuity method of actual plastic processing, make the practical application of microporous fibre become possibility.The mechanical property of microporous fibre mainly depends on and microcellular structure (comprising: hole dimension, hole density, pore size distribution and hole orientation) and molecular chain orientation.And through optimizing technology, control microcellular structure and molecular chain orientation can obtain the polysulfones microporous fibre of function admirable.
Traditionally, when the hole aperture on the fiber was big, fiber was stressed; The fiber hole is the cradle of fibrous fracture, reduces the intensity of fiber. and when the hole aperture on the fiber reaches the pore size scope, owing to be equivalent to the yardstick of the amorphous region of fiber; Because foaming process is adjusted the degree of crystallinity realization of setting zone, when foam was stressed, the abscess yardstick was less than the yardstick of fiber flaw simultaneously; Change direction of check, disperse and the change direction of check, with respect to the entity fiber that does not foam; Microporous fibre not only density reduces, and performance improves: high toughness, the low coefficient of heat conduction, high impact strength, low dielectric constant.
But because the microporous fibre non-weaving cloth is a kind of more special high molecular polymer aggregate of fibers; Have that processing temperature is higher, melt strength is lower under the high temperature; Can supercritical fluid is the low shortcoming that is unfavorable for microporous foam that waits of solubility therein, therefore, adopt the method that melts and sprays spinning of supercritical fluid; Preparation microporous fibre non-weaving cloth is the problem that non-woven production field technical staff extremely pays close attention to.
Summary of the invention
The purpose of this invention is to provide a kind of supercritical fluid of using and melt and spray the method that spinning prepares the microporous fibre non-weaving cloth, to satisfy the demand of association areas such as weaving, electric, electronics, machinery, medical treatment, chemical industry, food and Aero-Space.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following:
Application supercritical fluid of the present invention melts and sprays the method that spinning prepares the microporous fibre non-weaving cloth, comprises the steps:
(1) quantitatively feeds after polymer solids section gets into screw rod, be transferred and preheating in the screw feed section, then through compacting of screw compression section and fusing gradually;
(2), supercritical fluid in injection device injection of polymer melt, is formed the homogeneous polymer melt at the screw rod melt zone;
(3) in the filter part, the homogeneous polymer melt should pass through filter medium, residual catalyst after elimination impurity and the polymerisation;
(4) in the measuring pump part, the homogeneous polymer melt carries out melt-stoichiometry through gear wheel metering pump, with the accurate controlling fiber fineness and the uniformity;
(5) the homogeneous polymer melt through the meltblown beam inlet region, orifice flow district and fluffing zone extrude from the die head spinneret orifice;
When the polymer melt thread of (6) extruding from the die head spinneret orifice because of environmental pressure reduces suddenly expanded swelling is taken place, receive the drawing-off of both sides high velocity, hot air stream, the melt thread that is in viscous state is by drawing-down rapidly; Simultaneously, the air at room temperature of both sides mixes the drawing-off thermal air current, and melt thread cooling curing is shaped, and forms the ultra-fine microporous fibre of polymer;
(7) the ultra-fine microporous fibre of drawing-off and cooling curing is under the effect of attenuating blast; Blow to and coagulate lace curtaining or cylinder; Coagulate lace curtaining bottom or drum and be equipped with vacuum suction apparatus; Fiber collecting is coagulating on lace curtaining or the cylinder thus, relies on self heat bonding or other reinforcement means to become the microporous fibre non-weaving cloth.
Said supercritical fluid is overcritical N
2Perhaps supercritical CO
2Described polymer is at least a in polypropylene (PP), terylene (PET), terylene (COPET), polyethylene (PE), polyamide (PA), polyamide (COPA), elastic polyester (PBT), elastic polyester (PTT), polyacetal copolymer (POM), cyclic polyolefin hydrocarbon copolymer (COC), thermoplastic polyester elastomer (TPE – E), the polyphenylene sulfide (PPS).
It is 290 ~ 320 ℃ that the temperature of high velocity, hot air stream is used in the drawing-off of described both sides.
Said supercritical fluid is overcritical N
2The time, its temperature is 50 ~ 380 ℃, pressure is 7 ~ 40MPa, overcritical N
2With the mass ratio of pet polymer be 1:400-1:10.
Said supercritical fluid is a supercritical CO
2The time, its temperature is 50 ~ 380 ℃, critical pressure is 7 ~ 40MPa, supercritical CO
2With the mass ratio of pet polymer be 1:100-1:10.
The homogeneous polymer melt is 17 ~ 24 MPa with extraneous pressure differential, and melting and spraying speed is 10 ~ 2000cm
3/ s.
Description of drawings
Fig. 1 melts and sprays the method principle schematic that spinning prepares the microporous fibre non-weaving cloth for using supercritical fluid.
Advantage of the present invention is remarkable, adopts of the present inventionly to melt and spray the method that spinning prepares the microporous fibre non-weaving cloth with supercritical fluid, can make the 200-2000MP of high-tensile strength, high lightweight 0.1-2g/cm
3The microporous fibre non-weaving cloth.
Description of drawings
Fig. 1 uses supercritical fluid and melts and sprays the method principle schematic that spinning prepares microporous fibre.
The specific embodiment
The PET solid slice is quantitatively fed screw rod, and the PET solid slice is transferred and preheating in the screw feed section, then through compacting of screw compression section and fusing gradually.At the screw rod melt zone, be 50-380 ℃ with temperature, pressure is the supercritical fluid N of 7-40MPa
2Inject PET melt, overcritical N through injection device
2With the mass ratio of PET be 1:400-1:10, form homogeneous phase PET melt.In the filter part, homogeneous phase PET melt should pass through filter medium, residual catalyst after elimination impurity and the polymerisation.In the measuring pump part, homogeneous phase PET melt carries out melt-stoichiometry (10-500000g/h) through gear wheel metering pump, with the accurate controlling fiber fineness and the uniformity.As shown in Figure 1, arrow A is represented the injection direction of homogeneous phase PET melt among the figure, and arrow B is represented drawing-off with the mobile direction of hot-air, and arrow C is represented the flow of cold air direction.Homogeneous phase PET melt through meltblown beam inlet region 1, orifice flow district 2 and fluffing zone 3 extrude from the die head spinneret orifice, melting and spraying speed is 10-2000 cm
3/ s.When the PET melt thread of extruding from the die head spinneret orifice because of environmental pressure reduces suddenly expanded swelling is taken place, receive the drawing-off of both sides 290-320 ℃ high velocity, hot air stream, the melt thread that is in viscous state is by drawing-down rapidly.Simultaneously, the air at room temperature of both sides mixes the drawing-off thermal air current, and melt thread cooling curing is shaped, and forms ultra-fine micropore PET fiber.Under the effect of ultra-fine micropore PET fiber at attenuating blast of drawing-off and cooling curing; Blow to and coagulate lace curtaining or cylinder; Coagulate lace curtaining bottom or drum and be equipped with vacuum suction apparatus (air intake device 9); The PET fiber collecting relies on self to be thermal bonding to the fiber non-woven into microporous PE T on cohesion receiving system 8 (coagulating lace curtaining or cylinder) thus.Non-weaving cloth TENSILE STRENGTH 350MP, lightweight 0.6g/cm
3
Polypropylene PP solid slice is quantitatively fed screw rod, and the PP solid slice is transferred and preheating in the screw feed section, then through compacting of screw compression section and fusing gradually.At the screw rod melt zone, be 50 ℃ with temperature, pressure is the supercritical fluid N of 7MPa
2Inject PP melt, overcritical N through injection device
2With the mass ratio of PP be 1:200, form homogeneous phase PP melt.In the filter part, homogeneous phase PP melt should pass through filter medium, residual catalyst after elimination impurity and the polymerisation.In the measuring pump part, homogeneous phase PP melt carries out melt-stoichiometry ((10-500000g/h)) through gear wheel metering pump, with the accurate controlling fiber fineness and the uniformity.As shown in Figure 1, arrow A is represented the injection direction of homogeneous phase PP melt among the figure, and arrow B is represented drawing-off with the mobile direction of hot-air, and arrow C is represented the flow of cold air direction.Homogeneous phase PP melt through meltblown beam inlet region 1, orifice flow district 2 and fluffing zone 3 extrude from the die head spinneret orifice, melting and spraying speed is 10 cm
3/ s.When the PP melt thread of extruding from the die head spinneret orifice because of environmental pressure reduces suddenly expanded swelling is taken place, receive the drawing-off of the high velocity, hot air stream of 290 ℃ of both sides, the melt thread that is in viscous state is by drawing-down rapidly.Simultaneously, the air at room temperature of both sides mixes the drawing-off thermal air current, and melt thread cooling curing is shaped, and forms ultra-fine micropore PP fiber.Under the effect of ultra-fine micropore PP fiber at attenuating blast of drawing-off and cooling curing; Blow to and coagulate lace curtaining or cylinder; Coagulate lace curtaining bottom or drum and be equipped with vacuum suction apparatus, the PP fiber collecting relies on self to be thermal bonding to the fiber non-woven into micropore PP coagulating on lace curtaining or the cylinder thus.Non-weaving cloth TENSILE STRENGTH 200MP, lightweight 2g/cm
3
Embodiment 3
The polythene PE solid slice is quantitatively fed screw rod, and the PE solid slice is transferred and preheating in the screw feed section, then through compacting of screw compression section and fusing gradually.At the screw rod melt zone, be 260 ℃ with temperature, pressure is the supercritical fluid N of 20MPa
2Inject PE melt, overcritical N through injection device
2With the mass ratio of PE polymer be 1:10, form homogeneous phase PE melt.In the filter part, homogeneous phase PE melt should pass through filter medium, residual catalyst after elimination impurity and the polymerisation.In the measuring pump part, homogeneous phase PE melt carries out melt-stoichiometry ((10-500000g/h)) through gear wheel metering pump, with the accurate controlling fiber fineness and the uniformity.As shown in Figure 1, arrow A is represented the injection direction of homogeneous phase PE melt among the figure, and arrow B is represented drawing-off with the mobile direction of hot-air, and arrow C is represented the flow of cold air direction.Homogeneous phase PE melt through meltblown beam inlet region 1, orifice flow district 2 and fluffing zone 3 extrude from the die head spinneret orifice, melting and spraying speed is 400 cm
3/ s.When the PE melt thread of extruding from the die head spinneret orifice because of environmental pressure reduces suddenly expanded swelling is taken place, receive the drawing-off of the high velocity, hot air stream of 300 ℃ of both sides, the melt thread that is in viscous state is by drawing-down rapidly.Simultaneously, the air at room temperature of both sides mixes the drawing-off thermal air current, and melt thread cooling curing is shaped, and forms ultra-fine microporous PE fiber.Under the effect of ultra-fine microporous PE fiber at attenuating blast of drawing-off and cooling curing; Blow to and coagulate lace curtaining or cylinder; Coagulate lace curtaining bottom or drum and be equipped with vacuum suction apparatus, the PE fiber collecting relies on self to be thermal bonding to be the microporous PE fiber non-woven coagulating on lace curtaining or the cylinder thus.The 300MP of non-weaving cloth TENSILE STRENGTH, lightweight 1.6g/cm
3
Embodiment 4
Polyamide PA solid slice is quantitatively fed screw rod, and the PA solid slice is transferred and preheating in the screw feed section, then through compacting of screw compression section and fusing gradually.At the screw rod melt zone, be 380 ℃ with temperature, pressure is the supercritical fluid N of 40MPa
2Inject PA melt, overcritical N through injection device
2With the mass ratio of PA polymer be 1:400, form homogeneous phase PET melt.In the filter part, homogeneous phase PET melt should pass through filter medium, residual catalyst after elimination impurity and the polymerisation.In the measuring pump part, homogeneous phase PA melt carries out melt-stoichiometry ((10-500000g/h)) through gear wheel metering pump, with the accurate controlling fiber fineness and the uniformity.As shown in Figure 1, arrow A is represented the injection direction of homogeneous phase PA melt among the figure, and arrow B is represented drawing-off with the mobile direction of hot-air, and arrow C is represented the flow of cold air direction.Homogeneous phase PA melt through meltblown beam inlet region 1, orifice flow district 2 and fluffing zone 3 extrude from the die head spinneret orifice, melting and spraying speed is 800 cm
3/ s.When the PA melt thread of extruding from the die head spinneret orifice because of environmental pressure reduces suddenly expanded swelling is taken place, receive the drawing-off of the high velocity, hot air stream of 320 ℃ of both sides, the melt thread that is in viscous state is by drawing-down rapidly.Simultaneously, the air at room temperature of both sides mixes the drawing-off thermal air current, and melt thread cooling curing is shaped, and forms ultra-fine micropore PA fiber.Under the effect of ultra-fine micropore PA fiber at attenuating blast of drawing-off and cooling curing; Blow to and coagulate lace curtaining or cylinder; Coagulate lace curtaining bottom or drum and be equipped with vacuum suction apparatus, the PA fiber collecting relies on self to be thermal bonding to the fiber non-woven into micropore PA coagulating on lace curtaining or the cylinder thus.Non-weaving cloth TENSILE STRENGTH 400MP, lightweight 0.1g/cm
3
Embodiment 5
Elastic polyester PBT (whether commercially available various PET have the differentiation of trade name or model and so on) solid slice is quantitatively fed screw rod, and the PBT solid slice is transferred and preheating in the screw feed section, then through compacting of screw compression section and fusing gradually.At the screw rod melt zone, be 50-380 ℃ with temperature, pressure is the supercritical fluid CO of 7-40MPa
2Inject PBT melt, supercritical CO through injection device
2With the mass ratio of PBT polymer be 1:100-1:10, form homogeneous phase PBT melt.In the filter part, homogeneous phase PBT melt should pass through filter medium, residual catalyst after elimination impurity and the polymerisation.In the measuring pump part, homogeneous phase PBT melt carries out melt-stoichiometry ((10-500000g/h)) through gear wheel metering pump, with the accurate controlling fiber fineness and the uniformity.As shown in Figure 1, arrow A is represented the injection direction of homogeneous phase PBT melt among the figure, and arrow B is represented drawing-off with the mobile direction of hot-air, and arrow C is represented the flow of cold air direction.Homogeneous phase PBT melt through meltblown beam inlet region 1, orifice flow district 2 and fluffing zone 3 extrude from the die head spinneret orifice, melting and spraying speed is 1200 cm
3/ s.When the PBT melt thread of extruding from the die head spinneret orifice because of environmental pressure reduces suddenly expanded swelling is taken place, receive the drawing-off of both sides 290-320 ℃ high velocity, hot air stream, the melt thread that is in viscous state is by drawing-down rapidly.Simultaneously, the air at room temperature of both sides mixes the drawing-off thermal air current, and melt thread cooling curing is shaped, and forms ultra-fine micropore PBT fiber.Under the effect of ultra-fine micropore PBT fiber at attenuating blast of drawing-off and cooling curing; Blow to and coagulate lace curtaining or cylinder; Coagulate lace curtaining bottom or drum and be equipped with vacuum suction apparatus, the PBT fiber collecting relies on self to be thermal bonding to the fiber non-woven into micropore PBT coagulating on lace curtaining or the cylinder thus.The 550MP of non-weaving cloth TENSILE STRENGTH, lightweight 0.6g/cm
3
Embodiment 6
The polypropylene solid slice is quantitatively fed screw rod, and the polypropylene solid slice is transferred and preheating in the screw feed section, then through compacting of screw compression section and fusing gradually.At the screw rod melt zone, be 280 ℃ with temperature, pressure is the supercritical fluid CO of 25MPa
2Inject melt polypropylene, supercritical CO through injection device
2With polyacrylic mass ratio be 1:50, form the homogeneous phase melt polypropylene.In the filter part, the homogeneous phase melt polypropylene is through filter medium, residual catalyst after elimination impurity and the polymerisation.In the measuring pump part, the homogeneous phase melt polypropylene carries out melt-stoichiometry ((10-500000g/h)) through gear wheel metering pump, with the accurate controlling fiber fineness and the uniformity.As shown in Figure 1, arrow A is represented the injection direction of homogeneous phase melt polypropylene among the figure, and arrow B is represented drawing-off with the mobile direction of hot-air, and arrow C is represented the flow of cold air direction.Homogeneous phase polyacrylic polymer melt through meltblown beam inlet region 1, orifice flow district 2 and fluffing zone 3 extrude from the die head spinneret orifice, melting and spraying speed is 1600 cm
3/ s.When the melt polypropylene thread of extruding from the die head spinneret orifice because of environmental pressure reduces suddenly expanded swelling is taken place, receive the drawing-off of the high velocity, hot air stream of 290 ℃ of both sides, the melt thread that is in viscous state is by drawing-down rapidly.Simultaneously, the air at room temperature of both sides mixes the drawing-off thermal air current, and melt thread cooling curing is shaped, and forms ultra-fine microporous polypropylene fibers.Under the effect of ultra-fine microporous polypropylene fibers at attenuating blast of drawing-off and cooling curing; Blow to and coagulate lace curtaining or cylinder; Coagulate lace curtaining bottom or drum and be equipped with vacuum suction apparatus; Polypropylene fibre is collected in and coagulates on lace curtaining or the cylinder thus, relies on self to be thermal bonding to be the microporous polypropylene fibers non-weaving cloth.The 220MP of non-weaving cloth TENSILE STRENGTH, lightweight 1.2g/cm
3
Embodiment 7
The polyamide solid slice is quantitatively fed screw rod, and the polyamide solid slice is transferred and preheating in the screw feed section, then through compacting of screw compression section and fusing gradually.At the screw rod melt zone, be 380 ℃ with temperature, pressure is the supercritical fluid CO of 7MPa
2Inject polyamide melt, supercritical CO through injection device
2With the mass ratio of polyamide polymer be 1:100, form the homogeneous phase polyamide melt.In the filter part, the homogeneous phase polyamide melt should be passed through filter medium, residual catalyst after elimination impurity and the polymerisation.In the measuring pump part, the homogeneous phase polyamide melt is carried out melt-stoichiometry ((10-500000g/h)) through gear wheel metering pump, with the accurate controlling fiber fineness and the uniformity.As shown in Figure 1, arrow A is represented the injection direction of homogeneous phase polyamide melt among the figure, and arrow B is represented drawing-off with the mobile direction of hot-air, and arrow C is represented the flow of cold air direction.The homogeneous phase polyamide melt through meltblown beam inlet region 1, orifice flow district 2 and fluffing zone 3 extrude from the die head spinneret orifice, melting and spraying speed is 1800 cm
3/ s.When the polyamide melt thread of extruding from the die head spinneret orifice because of environmental pressure reduces suddenly expanded swelling is taken place, receive the drawing-off of the high velocity, hot air stream of 320 ℃ of both sides, the melt thread that is in viscous state is by drawing-down rapidly.Simultaneously, the air at room temperature of both sides mixes the drawing-off thermal air current, and melt thread cooling curing is shaped, and forms ultra-fine micropore polyamide fiber.Under the effect of ultra-fine micropore polyamide fiber at attenuating blast of drawing-off and cooling curing; Blow to and coagulate lace curtaining or cylinder; Coagulate lace curtaining bottom or drum and be equipped with vacuum suction apparatus; Polyamide fiber is collected in and coagulates on lace curtaining or the cylinder thus, relies on self to be thermal bonding to be the microcellular polyamide fiber non-woven.The 310MP of non-weaving cloth TENSILE STRENGTH, lightweight 0.8/cm
3
Embodiment 8
Elastic polyester PTT solid slice is quantitatively fed screw rod, and the PTT solid slice is transferred and preheating in the screw feed section, then through compacting of screw compression section and fusing gradually.At the screw rod melt zone, be 50 ℃ with temperature, pressure is the supercritical fluid CO of 40MPa
2Inject PET melt, supercritical CO through injection device
2With the mass ratio of PTT be 1:10, form homogeneous phase PTT melt.In the filter part, homogeneous phase PTT melt should pass through filter medium, residual catalyst after elimination impurity and the polymerisation.In the measuring pump part, homogeneous phase PTT melt carries out melt-stoichiometry ((10-500000g/h)) through gear wheel metering pump, with the accurate controlling fiber fineness and the uniformity.As shown in Figure 1, arrow A is represented the injection direction of homogeneous phase PTT polymer melt among the figure, and arrow B is represented drawing-off with the mobile direction of hot-air, and arrow C is represented the flow of cold air direction.Homogeneous phase PTT polymer melt through meltblown beam inlet region 1, orifice flow district 2 and fluffing zone 3 extrude from the die head spinneret orifice, melting and spraying speed is 2000 cm
3/ s.When the PTT melt thread of extruding from the die head spinneret orifice because of environmental pressure reduces suddenly expanded swelling is taken place, receive the drawing-off of the high velocity, hot air stream of 300 ℃ of both sides, the melt thread that is in viscous state is by drawing-down rapidly.Simultaneously, the air at room temperature of both sides mixes the drawing-off thermal air current, and melt thread cooling curing is shaped, and forms ultra-fine micropore ptt fiber.Under the effect of ultra-fine micropore ptt fiber at attenuating blast of drawing-off and cooling curing; Blow to and coagulate lace curtaining or cylinder; Coagulate lace curtaining bottom or drum and be equipped with vacuum suction apparatus; Polyamide fiber is collected in and coagulates on lace curtaining or the cylinder thus, relies on self to be thermal bonding to be micropore ptt fiber non-weaving cloth.The 420MP of non-weaving cloth TENSILE STRENGTH, lightweight 1.8g/cm
3
Claims (6)
1. use supercritical fluid and melt and spray the method that spinning prepares the microporous fibre non-weaving cloth for one kind, it is characterized in that, comprise the steps:
(1) quantitatively feeds after polymer solids section gets into screw rod, be transferred and preheating in the screw feed section, then through compacting of screw compression section and fusing gradually;
(2), supercritical fluid in injection device injection of polymer melt, is formed the homogeneous polymer melt at the screw rod melt zone;
(3) in the filter part, the homogeneous polymer melt should pass through filter medium, residual catalyst after elimination impurity and the polymerisation;
(4) in the measuring pump part, the homogeneous polymer melt carries out melt-stoichiometry through gear wheel metering pump, with the accurate controlling fiber fineness and the uniformity;
(5) the homogeneous polymer melt through the meltblown beam inlet region, orifice flow district and fluffing zone extrude from the die head spinneret orifice;
When the polymer melt thread of (6) extruding from the die head spinneret orifice because of environmental pressure reduces suddenly expanded swelling is taken place, receive the drawing-off of both sides high velocity, hot air stream, the melt thread that is in viscous state is by drawing-down rapidly; Simultaneously, the air at room temperature of both sides mixes the drawing-off thermal air current, and melt thread cooling curing is shaped, and forms the ultra-fine microporous fibre of polymer;
(7) the ultra-fine microporous fibre of drawing-off and cooling curing is under the effect of attenuating blast; Blow to and coagulate lace curtaining or cylinder; Coagulate lace curtaining bottom or drum and be equipped with vacuum suction apparatus; Fiber collecting is coagulating on lace curtaining or the cylinder thus, relies on self heat bonding or other reinforcement means to become the microporous fibre non-weaving cloth.
2. application supercritical fluid according to claim 1 melts and sprays the method that spinning prepares the microporous fibre non-weaving cloth, it is characterized in that: said supercritical fluid is overcritical N
2Perhaps supercritical CO
2Described polymer is at least a in polypropylene PP, terylene PET, terylene COPET, polythene PE, polyamide PA, polyamide COPA, elastic polyester PBT, elastic polyester PTT, polyacetal copolymer (POM), cyclic polyolefin hydrocarbon copolymer (COC), thermoplastic polyester elastomer (TPE – E), the polyphenylene sulfide (PPS).
3. application supercritical fluid according to claim 1 and 2 melts and sprays the method that spinning prepares the microporous fibre non-weaving cloth, it is characterized in that: it is 290 ~ 320 ℃ that the temperature of high velocity, hot air stream is used in the drawing-off of described both sides.
4. application supercritical fluid according to claim 2 melts and sprays the method that spinning prepares the microporous fibre non-weaving cloth, it is characterized in that: said supercritical fluid is overcritical N
2The time, its temperature is 50 ~ 380 ℃, pressure is 7 ~ 40MPa, overcritical N
2With the mass ratio of pet polymer be 1:400-1:10.
5. application supercritical fluid according to claim 2 melts and sprays the method that spinning prepares the microporous fibre non-weaving cloth, it is characterized in that: said supercritical fluid is a supercritical CO
2The time, its temperature is 50 ~ 380 ℃, critical pressure is 7 ~ 40MPa, supercritical CO
2With the mass ratio of pet polymer be 1:100-1:10.
6. application supercritical fluid according to claim 2 melts and sprays the method that spinning prepares the microporous fibre non-weaving cloth, it is characterized in that: the homogeneous polymer melt is 17 ~ 24 MPa with extraneous pressure differential, and melting and spraying speed is 10 ~ 2000cm
3/ s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103339502A CN102505347A (en) | 2011-10-28 | 2011-10-28 | Method for preparing microporous fiber nonwovens by applying supercritical fluid melt-blowing and spinning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103339502A CN102505347A (en) | 2011-10-28 | 2011-10-28 | Method for preparing microporous fiber nonwovens by applying supercritical fluid melt-blowing and spinning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102505347A true CN102505347A (en) | 2012-06-20 |
Family
ID=46217475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103339502A Pending CN102505347A (en) | 2011-10-28 | 2011-10-28 | Method for preparing microporous fiber nonwovens by applying supercritical fluid melt-blowing and spinning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102505347A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696081A (en) * | 2013-12-04 | 2014-04-02 | 苏州新米纺织咨询服务有限公司 | Superfine filament polyester ethylene fabric |
| CN105568548A (en) * | 2014-10-08 | 2016-05-11 | 张家港骏马无纺布有限公司 | Cottonlike non-woven fabric preparation method |
| CN105648654A (en) * | 2015-12-29 | 2016-06-08 | 江苏苏博特新材料股份有限公司 | Polyoxy methylene fiber needle-punched non-woven geotechnical cloth and manufacturing method thereof |
| CN107128051A (en) * | 2017-06-21 | 2017-09-05 | 深圳市三上高分子环保新材料股份有限公司 | Pre-coating film and its manufacture method and device systems with pile effects |
| CN108589055A (en) * | 2018-05-11 | 2018-09-28 | 杨杰 | A kind of producing technology of non-woven fabrics increasing non-woven fabrics density |
| WO2019037746A1 (en) * | 2017-08-24 | 2019-02-28 | 清远广硕技研服务有限公司 | Foamed fabric structure and manufacturing method therefor |
| CN111560711A (en) * | 2020-05-25 | 2020-08-21 | 张家港高品诚医械科技有限公司 | Filter non-woven fabric and mask using same |
| CN111691060A (en) * | 2020-06-10 | 2020-09-22 | 东华大学 | High polymer fiber based on instantaneous pressure-release spinning method, and preparation method and application thereof |
| CN111705368A (en) * | 2020-06-10 | 2020-09-25 | 东华大学 | Method for preparing polypropylene fiber aggregate based on instantaneous pressure-release spinning method and application |
| CN111962286A (en) * | 2020-07-22 | 2020-11-20 | 阳信金峰生态纤维有限公司 | Application of improved PP (polypropylene) in melt-blown fabric |
| WO2020242475A1 (en) * | 2019-05-30 | 2020-12-03 | Kimberly-Clark Worldwide, Inc. | Apparatuses and methods for manufacturing absorbent structures including flexible masking media |
| CN114575035A (en) * | 2022-02-15 | 2022-06-03 | 同为智造科技(广州)有限公司 | Filter element manufacturing equipment and manufacturing process |
| CN115262087A (en) * | 2022-08-25 | 2022-11-01 | 深圳科博源科技有限公司 | Melt-blown board capable of replacing glass fiber board, processing method and application |
| KR20230089367A (en) * | 2021-12-13 | 2023-06-20 | (주)씨앤투스 | Flash―Spun Apparatus with Air Curtain and Method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000154462A (en) * | 1998-11-18 | 2000-06-06 | Toray Ind Inc | Production of fibrous structure |
| CN1705776A (en) * | 2002-10-18 | 2005-12-07 | 可隆株式会社 | A microcellular foamed fiber, and a process of preparing for the same |
| WO2009076582A2 (en) * | 2007-12-12 | 2009-06-18 | Boston Scientific Scimed, Inc. | Melt processed materials for medical articles |
-
2011
- 2011-10-28 CN CN2011103339502A patent/CN102505347A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000154462A (en) * | 1998-11-18 | 2000-06-06 | Toray Ind Inc | Production of fibrous structure |
| CN1705776A (en) * | 2002-10-18 | 2005-12-07 | 可隆株式会社 | A microcellular foamed fiber, and a process of preparing for the same |
| WO2009076582A2 (en) * | 2007-12-12 | 2009-06-18 | Boston Scientific Scimed, Inc. | Melt processed materials for medical articles |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696081A (en) * | 2013-12-04 | 2014-04-02 | 苏州新米纺织咨询服务有限公司 | Superfine filament polyester ethylene fabric |
| CN105568548A (en) * | 2014-10-08 | 2016-05-11 | 张家港骏马无纺布有限公司 | Cottonlike non-woven fabric preparation method |
| CN105648654A (en) * | 2015-12-29 | 2016-06-08 | 江苏苏博特新材料股份有限公司 | Polyoxy methylene fiber needle-punched non-woven geotechnical cloth and manufacturing method thereof |
| CN107128051A (en) * | 2017-06-21 | 2017-09-05 | 深圳市三上高分子环保新材料股份有限公司 | Pre-coating film and its manufacture method and device systems with pile effects |
| WO2019037746A1 (en) * | 2017-08-24 | 2019-02-28 | 清远广硕技研服务有限公司 | Foamed fabric structure and manufacturing method therefor |
| CN108589055A (en) * | 2018-05-11 | 2018-09-28 | 杨杰 | A kind of producing technology of non-woven fabrics increasing non-woven fabrics density |
| WO2020242475A1 (en) * | 2019-05-30 | 2020-12-03 | Kimberly-Clark Worldwide, Inc. | Apparatuses and methods for manufacturing absorbent structures including flexible masking media |
| CN111560711A (en) * | 2020-05-25 | 2020-08-21 | 张家港高品诚医械科技有限公司 | Filter non-woven fabric and mask using same |
| CN111705368A (en) * | 2020-06-10 | 2020-09-25 | 东华大学 | Method for preparing polypropylene fiber aggregate based on instantaneous pressure-release spinning method and application |
| CN111691060A (en) * | 2020-06-10 | 2020-09-22 | 东华大学 | High polymer fiber based on instantaneous pressure-release spinning method, and preparation method and application thereof |
| CN111691060B (en) * | 2020-06-10 | 2022-11-11 | 东华大学 | High polymer fiber based on instantaneous pressure-release spinning method, and preparation method and application thereof |
| CN111962286A (en) * | 2020-07-22 | 2020-11-20 | 阳信金峰生态纤维有限公司 | Application of improved PP (polypropylene) in melt-blown fabric |
| KR20230089367A (en) * | 2021-12-13 | 2023-06-20 | (주)씨앤투스 | Flash―Spun Apparatus with Air Curtain and Method thereof |
| KR102650274B1 (en) * | 2021-12-13 | 2024-03-22 | (주)씨앤투스 | Flash―Spun Apparatus with Air Curtain and Method thereof |
| CN114575035A (en) * | 2022-02-15 | 2022-06-03 | 同为智造科技(广州)有限公司 | Filter element manufacturing equipment and manufacturing process |
| CN115262087A (en) * | 2022-08-25 | 2022-11-01 | 深圳科博源科技有限公司 | Melt-blown board capable of replacing glass fiber board, processing method and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102505347A (en) | Method for preparing microporous fiber nonwovens by applying supercritical fluid melt-blowing and spinning | |
| KR101800034B1 (en) | Apparatus, system, and method for forming nanofibers and nanofiber webs | |
| TWI621743B (en) | Method for preparing moisture-absorbing transfer non-woven fabric by using short fiber spinning method | |
| JP5642964B2 (en) | Fiber web comprising microfibers dispersed in bonded melt-spun fibers | |
| JP5654356B2 (en) | Composite nonwoven web and method for making and using the same | |
| TWI632259B (en) | Method for preparing moisture-absorbing transfer non-woven fabric by using spunbonding method | |
| TWI621742B (en) | Method for preparing non-woven fabric with hygroscopic transferability by melt-blown method | |
| KR102510597B1 (en) | Meltblown nonwoven fabric, laminate using the same, manufacturing method of meltblown nonwoven fabric, and melt blown device | |
| US20030137069A1 (en) | Process and apparatus for the production of nanofibers | |
| CN103085374B (en) | Melt-blown activated carbon non-woven fabric and its production technology | |
| CN101760903B (en) | Method for preparing polyphenylene sulfide spun-bonded needle punched non-woven fabrics | |
| WO2015027769A1 (en) | Novel enhancing electrostatic spinning nanofiber membrane, producing method thereof, and device applied to method | |
| CN1920149A (en) | Preparation method of meltblow nonwoven containing short fiber | |
| JP2016536486A (en) | Bicomponent fiber, product formed therefrom and method of making the same | |
| EP1471176B1 (en) | Process for producing electret | |
| JP2019518148A (en) | Solution-spun polyamide nanofiber non-woven fabric | |
| CN102517663B (en) | Method for preparing microporous fibers by applying melt blowing and spinning of supercritical fluid | |
| CN111636146A (en) | Preparation method of non-woven fabric | |
| CN102505165A (en) | Method for preparing polysulfone micro-porous fiber by supercritical fluid meltblown spinning process | |
| CN111020885A (en) | Preparation method of breathable and waterproof polyurethane nanofiber non-woven fabric | |
| CN106319768A (en) | Production method of double-component spun-bonded non-woven fabrics | |
| CN206858772U (en) | Equipment for producing three component compound nonwoven cloths | |
| CN105696192B (en) | The method with moisture absorption metastatic adhesive-bonded fabric is prepared using melt-blown mode | |
| CN102443970A (en) | Method for preparing polysulfonate microporous fibre non-woven fabric | |
| CN110499586B (en) | Electrostatic cotton material and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120620 |