CN101665993B - Ultrafine melt-blown non-woven fabric mixed material, melt-blown non-woven fabric prepared from same, and manufacturing method thereof - Google Patents
Ultrafine melt-blown non-woven fabric mixed material, melt-blown non-woven fabric prepared from same, and manufacturing method thereof Download PDFInfo
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Abstract
The invention provides an ultrafine melt-blown non-woven fabric mixed material, a melt-blown non-woven fabric prepared from same, and a manufacturing method thereof. The ultrafine melt-blown non-woven fabric material comprises polypropylene I and polypropylene II, wherein the polypropylene I is the polypropylene with the melt index between 80 and 400 g/10min; the polypropylene II is the polypropylene with the melt index between 800 and 2,000 g/10min; and the weight ratio of the polypropylene I to the polypropylene II is between 10:90 and 90:10, preferably between 25:75 and 75:25. A method forpreparing mixed fiber comprises: mixing the polypropylene I and the polypropylene II; performing granulation; melting particles obtained through granulation; extruding melt from fiber-spraying holes on a mold head through a melt-distributing channel; and performing ultra-fold drafting via hot airflow. The application of the ultrafine melt-blown non-woven fabric material provided by the invention in the production of the melt-blown non-woven fabric can avoid using expensive special equipment, and the non-woven fabric produced is high in strength and difficult to break.
Description
Technical field
The present invention relates to field of textiles, in particular, relate to the melt spraying non-woven fabrics and the manufacturing approach thereof of a kind of ultra-fine melt spraying non-woven fabrics composite material, its preparation.
Background technology
Demand grows with each passing day ultra-fine melt spraying non-woven fabrics in the high-efficiency filtering material field; It is very high to the requirement of equipment that present stage prepares ultra-fine melt spraying non-woven fabrics, has only foreign equipment manufacturers of a few family such as Lay sweet smell, Niu Mage, Rieter, method are auspicious, Xi Ersi can make high performance equipment at present.
Melt blown non-woven technology as Lai Fen company uses in high-end filtration art improves in spinning and drawing-off, through changing the demand that performance indications such as fibre web aperture, fabric bulkiness or fibre diameter satisfy industry.Healtech S. A.'s emphasis has been released the production system that melts and sprays near Nano grade; It is said the PP raw material that utilizes high fusion index and special die head; The average fineness that melts and sprays that it spins out is 250nm, and denier range is between 25～400nm, and the spinnerets hole count that its special die head adopts is 100 holes/inch or higher; The centre-to-centre spacing of Kong Yukong is 0.115mm, and the diameter in hole is 0.11mm.
For reaching the purpose of preparation superfine fibre; Meltblown beam orifice diameter and hole centre-to-centre spacing that each company all requires to process are as far as possible little, but such die head makes that the extrusion pressure of melt is too high, are prone to take place the extrusion swelling phenomenon in the exit; Cause the fiber doubling, product quality descends.
Generation for fear of this phenomenon; Offshore company all adopts special technique to prepare the meltblown beam of high length-diameter ratio; Part enterprise die head draw ratio even up to 60: 1, the meltblown beam for preparing this high length-diameter ratio has proposed high requirement to machining technique, equipment.The domestic restriction that receives the machined level, equipment precision are difficult to reach the requirement of preparation high length-diameter ratio meltblown beam, and domestic general meltblown beam spinnerets draw ratio is for being generally 15: 1 or 20: 1.
Though use melting and spraying PP Pipe Compound and can reducing melt in the melt blown process doubling phenomenon that behavior caused that swells of high fusion index; But because the certain applications field proposes certain requirement to filter material intensity; And high fusion index to melt and spray the prepared filter material intensity of PP Pipe Compound lower, can not satisfy instructions for use.
Patent application 200610130079.5 discloses a kind of double component molten and jetted non-woven fabric, and it is processed according to the mixed of 30～70:70～30 by PP and PET, thereby improves elasticity, intensity and the durability of existing melt-blowing nonwoven.But what this patent application was adopted is that two kinds of materials are extruded respectively, thereby forms a kind of parallel type double component molten and jetted non-woven fabric.These two kinds of materials are that branch comes and arranges side by side.This scheme still can not solve the complexity problem of spray silk technology.
In view of this, special propose the present invention,, reduce the rate that swells of melt when spinnerets comes out, utilize the spinnerets of conventional draw ratio to realize the preparation of ultra-fine melt spraying non-woven fabrics through raw material is carried out modification.
Summary of the invention
One of the object of the invention is to provide a kind of ultra-fine melt spraying non-woven fabrics composite material, can reduce the outlet of melt when spinnerets the is extruded rate that swells when utilizing this material preparation melt spraying non-woven fabrics;
Another purpose of the present invention is to provide the melt spraying non-woven fabrics of the above-mentioned material preparation of a kind of usefulness, and this nonwoven fabric has good intensity;
Still a further object of the present invention provides the preparation method of above-mentioned melt spraying non-woven fabrics, and this method can be used common die head of the prior art, and avoids the use of the expensive device of import.
For realizing above-mentioned purpose, the present invention has adopted following technical scheme:
A kind of ultra-fine melt spraying non-woven fabrics is used composite material; Said composite material is used to prepare ultra-fine melt spraying non-woven fabrics; It comprises polypropylene I and polypropylene II, and said polypropylene I is the polypropylene of melt index 80～400g/10min, is preferably the polypropylene of 150～400g/10min; Said polypropylene II is the polypropylene of melt index 800～2000g/10min, is preferably the polypropylene of 1200～1600g/10min; Said polypropylene I and polypropylene II weight ratio are 10:90～90:10, and preferred weight ratio is 25:75～75:25; More preferably weight ratio is 40:60～60:40.
The present invention adopts two kinds of polypropylene in the particular melt index range to process composite material; This material can improve common non-woven fabric with the polypropylene material high problem of rate that swells; The doubling phenomenon taking place extruding Shi Buhui, can keep the intensity of nonwoven fabric simultaneously because of swelling.
A kind of melt spraying non-woven fabrics of using composite material preparation noted earlier, said nonwoven fabric is prepared by the front blended fiber.
Also can overcome the high problem of the rate of swelling though use the polypropylene material of high fusion index to produce melt spraying non-woven fabrics, the fibre strength that makes is low, and this nonwoven fabric is very easily damaged, has limited it and has used widely.Also can change simultaneously, and make troubles, and increase the weight of user's financial cost to the user because of being prone to broken often the needs.And the melt spraying non-woven fabrics intensity of using polypropylene composite material preparation according to the invention is strengthened greatly, and durability is greatly improved.
According to foregoing melt spraying non-woven fabrics, said nonwoven fabric longitudinal tensile strength 350～750CN, transverse tensile strength 150～350CN; Preferred longitudinal tensile strength 550～700CN, transverse tensile strength 270～300CN.
Adopt the melt spraying non-woven fabrics of material preparation according to the invention, its tensile strength is furnished with obvious enhancing than the nonwoven of one-component preparation, has expanded its use field.
According to foregoing melt spraying non-woven fabrics, said melt spraying non-woven fabrics fibre diameter is 0.01～20 micron; Preferred 0.1～10 micron.
A kind of method for preparing blended fiber noted earlier comprises the steps:
(1) polypropylene I and polypropylene II are mixed by weight 10:90～90:10 after, preferably by weight 25:75～75:25, after more preferably mixing, carry out granulation by weight 40:60～60:40;
(2) after the particulate material that above-mentioned granulation is obtained is passed through the extruder heating and melting; Distribute runner to be extruded by the spinneret orifice on the die head through melt, through the ultra times drawing-off of thermal current, the fiber cooling curing of super-refinement is deposited on the collecting net equipment; Be wound into net, promptly obtain melt spraying non-woven fabrics.
Here the described mixing of step (1), granulation all can be with reference to prior aries.
According to foregoing method, the said granulation of step (1) is the twin-screw granulation, and extruder temperature is controlled at 100～245 ℃, preferred 130～195 ℃.
According to foregoing preparation method, the spinnerets draw ratio of the said die head of step (2) is present domestic normally used common melt-blowing equipment die head draw ratio, and wherein comparatively common draw ratio is 10: 1～20: 1, and most preferred draw ratio is 15:1.
According to foregoing preparation method, it is characterized in that the said hot stream temperature of step (2) is controlled at 100～400 ℃, preferred 200～350 ℃, more preferably 250～300 ℃; Said gas pressure is controlled at 0.1～0.6MPa, preferred 0.2～0.4MPa.
According to foregoing preparation method, the said extruder control of step (2) temperature is 100～300 ℃, preferred 150～285 ℃; Said distribution runner temperature is controlled at 200～300 ℃, preferred 240～285 ℃; Said die head temperature is controlled at 200～300 ℃, preferred 240～285 ℃.
Common polypropylene material needs very high length-diameter ratio, generally needs draw ratio to spray silk up to the die head of 60:1, and it is very expensive to possess the equipment of this die head, has increased the production cost of melt spraying non-woven fabrics undoubtedly.Having adopted composite material of the present invention, is 10:90～90:10 by weight ratio promptly, and preferred weight ratio is 25:75～75:25; More preferably weight ratio is the composite material that polypropylene I and the polypropylene II of 40:60～60:40 forms, and can use common draw ratio is that 10: 1～20: 1 die head carries out the production of nonwoven fabric.And the polypropylene that said polypropylene I is melt index 80～400g/10min is preferably the polypropylene of 150～400g/10min, and said polypropylene II is the polypropylene of melt index 800～2000g/10min, is preferably the polypropylene of 1200～1600g/10min.The melt spraying non-woven fabrics cost that this method is produced is low, reasonable price, and nonwoven fabric good product quality, and intensity is high, and Application Areas is broad more.
In sum, technical scheme of the present invention has following advantage:
(1) material according to the invention is compared with conventional melt-blown material, can reduce outlet when spinneret orifice the is extruded rate that swells, and reduces the generation of doubling phenomenon;
(2) processing cost is low, uses blended fiber manufacturing melt spraying non-woven fabrics according to the invention and need not to use special installation;
(3) the fine footpath of the nonwoven fabric that obtains of the present invention is little, and intensity is good;
(4) nonwoven fabric that obtains of the present invention has littler fibre web aperture and better strainability, can satisfy the application requirements in multiple field.
The specific embodiment
Following embodiment will do to explain more specifically to the present invention, but the present invention is not limited only to these embodiment, and these embodiment do not limit the present invention in any way yet equally.
Embodiment 1-9
The preparation method of the PP Pipe Compound of ultra-fine melt spraying non-woven fabrics:
Polypropylene I, polypropylene II sees table 1.Two kinds of raw material blend ratios are pressed listed blend in the table 2, and through the twin-screw granulation, extruder temperature is controlled at 130 ℃～195 ℃.
Two kinds of raw materials melt indexes of table 1 (g/10min)
| Embodiment | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| I | 80 | 200 | 370 | 150 | 400 | 300 | 100 | 250 | 350 |
| II | 1500 | 1200 | 1000 | 1200 | 1500 | 1600 | 1800 | 2000 | 800 |
Two kinds of raw material blend of table 2 ratio (%)
| Embodiment | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| I | 25 | 30 | 40 | 50 | 60 | 70 | 75 | 90 | 10 |
| II | 75 | 70 | 60 | 50 | 40 | 30 | 25 | 10 | 90 |
The preparation method of ultra-fine melt spraying non-woven fabrics:
With the polypropylene I of the said different melt index of table 1, II according to the described mixed granulation of corresponding table 2 after, said mixing granulation is any mixing granulation of prior art.After the particle that obtains is heated into molten condition through extruder, extrude through the spinneret orifice that melt distributes runner to arrive the die head front end.Jet gas pressure, gas temperature see that table 3 is listed.Jet gas will surpass a times drawing-off from the fiber that spinneret orifice is extruded, and form superfine fibre, after gathering-device is processed quantitative superfine fibre fabric.The spinnerets draw ratio of said die head is 10: 1～20: 1.
Perhaps with the polypropylene I of the said different melt index of table 1, II according to the described mixed of corresponding table 2 after with twin-screw granulation granulation; Extruder temperature is controlled between 100～245 ℃ of scopes; If can be controlled between 130～195 ℃, effect can be desirable more.The said any mixing that is mixed into prior art, granulation process also can be with reference to prior art.After the particle that obtains is heated into molten condition through extruder, extrude through the spinneret orifice that melt distributes runner to arrive the die head front end.Extruder temperature, runner temperature, die head temperature, jet gas pressure, gas temperature see that table 3 is listed.Jet gas will surpass a times drawing-off from the fiber that spinneret orifice is extruded, and form superfine fibre, after gathering-device is processed quantitative superfine fibre fabric.The spinnerets draw ratio of said die head is any draw ratio of common spray silk die head spinnerets commonly used at present.
Table 3 main technique condition and fiber parameter
| Embodiment | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Gas pressure (MPa) | 0.4 | 0.4 | 0.3 | 0.3 | 0.2 | 0.1 | 0.5 | 0.6 | 0.5 |
| Gas temperature (℃) | 300 | 250 | 300 | 200 | 350 | 100 | 400 | 150 | 200 |
| Melt exports the rate that swells | 1.16 | 1.11 | 1.16 | 1.14 | 1.14 | 1.18 | 1.18 | 1.20 | 1.19 |
| Fibre diameter (μ m) | 3-8 | 0.1-0.5 | 1-5 | 3-8 | 0.5-3 | 10-15 | 5-10 | 15-20 | 5-10 |
| Extruder temperature (℃) | 230 | 245 | 235 | 255 | 270 | 280 | 265 | 285 | 240 |
| Distribution runner temperature (℃) | 235 | 250 | 240 | 260 | 260 | 280 | 270 | 290 | 245 |
| Die head temperature (℃) | 230 | 245 | 240 | 255 | 260 | 280 | 270 | 285 | 240 |
Embodiment 10
Prepare some batches of nonwoven fabric with the composite material of describing among the present invention, and pick out part representative to enumerate its strength range following:
Table 4, nonwoven fabric intensity of the present invention
| Batch | 1 | 2 | 3 | 4 | 5 |
| Longitudinal tensile strength (CN) | 350～400 | 450～500 | 550～600 | 650～700 | 700～750 |
| Transverse tensile strength (CN) | 150～180 | 200～230 | 230～260 | 270～300 | 300～350 |
Annotate: the nonwoven fabric grammes per square metre is 45g/m
2
Comparative example 1
For explaining that nonwoven fabric according to the invention has the incomparable performance of nonwoven fabric of common material preparation; The melt spraying non-woven fabrics that the special melt spraying non-woven fabrics that material according to the invention is obtained obtains with common material carries out the strength test experiment, and it is following to enumerate the nonwoven fabric strength range of the single polypropylene material preparation of different melt index:
The nonwoven fabric intensity of table 5, the single polypropylene material preparation of different melt index and the outlet rate that swells contrast
| Melt index (g/10min) | 1400 | 1000 | 800 | 2000 |
| Longitudinal tensile strength (CN) | 250～270 | 280～300 | 400～450 | 220～240 |
| Transverse tensile strength (CN) | 100～150 | 210～220 | 240～260 | 90～110 |
| The fiber outlet rate that swells | 1.11 | 1.16 | 1.24 | 1.10 |
Annotate: the nonwoven fabric grammes per square metre is 45g/m
2
Can be found out to have the low rate that swells although adopt single polypropylene material than high fusion index to prepare when melt spraying non-woven fabrics also can make the filament ejection by last table, the nonwoven fabric TENSILE STRENGTH of processing is starkly lower than melt spraying non-woven fabrics of the present invention.The nonwoven fabric of this homogenous material is more prone to damage, and its range of application is also smaller.
The nonwoven fabric intensity of the bi-component polypropylene material preparation in other melt index scope is:
The nonwoven fabric intensity of the bi-component polypropylene material preparation of table 6, other melt index scope and the outlet rate that swells contrast
| Melt index (g/10min) and content | 450，50％?1000，50％ | 500，60％800，40％ | 50，40％ 1500，60％ | 350，50％?2500，50％ |
| Longitudinal tensile strength (CN) | 370～390 | 410～450 | 400～450 | 300～320 |
| Transverse tensile strength (CN) | 170～180 | 200～220 | 250～280 | 100～120 |
| The fiber outlet rate that swells | 1.31 | 1.36 | 1.24 | 1.15 |
In the superincumbent form, when the rate of swelling surpassed 1.20, doubling can take place and have a strong impact on the nonwoven fabric quality in the spray silk.
Claims (21)
1. ultra-fine melt spraying non-woven fabrics composite material; It is characterized in that; Said composite material is used to prepare ultra-fine melt spraying non-woven fabrics; It comprises polypropylene I and polypropylene II, and said polypropylene I is the polypropylene of melt index 150～400g/10min, and said polypropylene II is the polypropylene of melt index 1200～1600g/10min; Said polypropylene I and polypropylene II weight ratio are 10: 90～90: 10.
2. ultra-fine melt spraying non-woven fabrics composite material according to claim 1 is characterized in that, said polypropylene I and polypropylene II weight ratio are 25: 75～75: 25.
3. ultra-fine melt spraying non-woven fabrics composite material according to claim 2 is characterized in that, said polypropylene I and polypropylene II weight ratio are 40: 60～60: 40.
4. an application rights requires 1～3 any melt spraying non-woven fabrics that said composite material prepares, and it is characterized in that said nonwoven fabric is prepared by the said composite material of claim 1.
5. melt spraying non-woven fabrics according to claim 4 is characterized in that, said nonwoven fabric longitudinal tensile strength 350～750CN, transverse tensile strength 150～350CN.
6. melt spraying non-woven fabrics according to claim 5 is characterized in that, said longitudinal tensile strength 550～700CN, transverse tensile strength 270～300CN.
7. melt spraying non-woven fabrics according to claim 4 is characterized in that, said melt spraying non-woven fabrics fibre diameter is 0.1～20 micron.
8. melt spraying non-woven fabrics according to claim 7 is characterized in that, said melt spraying non-woven fabrics fibre diameter is 0.1～10 micron.
9. a method for preparing any said melt spraying non-woven fabrics of claim 4～8 is characterized in that, comprises the steps:
(1) polypropylene I and polypropylene II were mixed by weight 10: 90～90: 10 after, carry out granulation;
(2) after the particulate material that above-mentioned granulation is obtained is passed through the extruder heating and melting; Distribute runner to be extruded by the spinneret orifice on the die head through melt, through the ultra times drawing-off of thermal current, the fiber cooling curing of super-refinement is deposited on the collecting net equipment; Be wound into net, promptly obtain melt spraying non-woven fabrics.
10. method according to claim 9 is characterized in that, step (1) was mixed polypropylene I and polypropylene II by weight 25: 75～75: 25.
11. method according to claim 10 is characterized in that, step (1) was mixed polypropylene I and polypropylene II by weight 40: 60～60: 40.
12. method according to claim 9 is characterized in that, the said granulation of step (1) is the twin-screw granulation, and extruder temperature is controlled at 100～245 ℃.
13. method according to claim 12 is characterized in that, the said extruder temperature of step (1) is controlled at 130～195 ℃.
14. preparation method according to claim 9 is characterized in that, the said hot stream temperature of step (2) is controlled at 100～400 ℃; Said thermal current gas pressure is controlled at 0.1～0.6MPa.
15. preparation method according to claim 14 is characterized in that, the said hot stream temperature of step (2) is controlled at 200～350 ℃.
16. preparation method according to claim 15 is characterized in that, the said hot stream temperature of step (2) is controlled at 250～300 ℃.
17. preparation method according to claim 14 is characterized in that, the said thermal current gas pressure of step (2) is controlled at 0.2～0.4MPa.
18. preparation method according to claim 9 is characterized in that, 100～300 ℃ of the said extruder control of step (2) temperature; Said distribution runner temperature is controlled at 200～300 ℃; Said die head temperature is controlled at 200～300 ℃.
19. preparation method according to claim 18 is characterized in that, 150～285 ℃ of the said extruder control of step (2) temperature.
20. preparation method according to claim 18 is characterized in that, the said distribution runner of step (2) temperature is controlled at 240～285 ℃.
21. preparation method according to claim 18 is characterized in that, the said die head temperature of step (2) is controlled at 240～285 ℃.
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| CN102634931A (en) * | 2012-03-12 | 2012-08-15 | 马素德 | Production method of absorptive radiation-proof nonwoven fabrics |
| CN108677380B (en) * | 2018-04-24 | 2020-06-09 | 北京弘暖纤科技有限公司 | Aerogel modified polypropylene, ultra-light heat-insulating melt-blown non-woven fabric and preparation method thereof |
| AR119400A1 (en) * | 2019-07-26 | 2021-12-15 | Dow Global Technologies Llc | BI-COMPOSITE FIBERS, MELT-BLOWN NON-WOVEN FABRICS, AND COMPOSITES OF THESE |
| CN111676595B (en) * | 2020-05-25 | 2022-01-14 | 界首市天鸿新材料股份有限公司 | Preparation method of modified polypropylene melt-blown nonwoven material |
| CN112226906A (en) * | 2020-09-30 | 2021-01-15 | 安徽灵春医用耗材有限公司 | Preparation method of composite layer mask material |
| CN114618233A (en) * | 2020-12-14 | 2022-06-14 | 浙江省化工研究院有限公司 | ECTFE melt-blown filter material and preparation method thereof |
| CN114318675A (en) * | 2021-12-31 | 2022-04-12 | 阳光卫生医疗科技江阴有限公司 | High-cleaning-power scouring pad and preparation method thereof |
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