CN103074738A - Method for forming shape-controllable nonwoven material - Google Patents
Method for forming shape-controllable nonwoven material Download PDFInfo
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- CN103074738A CN103074738A CN201310004708XA CN201310004708A CN103074738A CN 103074738 A CN103074738 A CN 103074738A CN 201310004708X A CN201310004708X A CN 201310004708XA CN 201310004708 A CN201310004708 A CN 201310004708A CN 103074738 A CN103074738 A CN 103074738A
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Abstract
The invention discloses a method for forming a shape-controllable nonwoven material. The method comprises the following steps that a two-dimensional planar shape is controllable, and a three-dimensional shape is controllable; on the basis of an electrospinning technique, the shape of a nonwoven material to be prepared is used as a template to design a receiver; a negative high-voltage direct-current power supply is connected onto the receiver; a positive power supply and the negative power supply are adopted to control space electric field distribution together, so that fibers are directionally deposited onto the receiver with negative high voltage until the fibers cover the whole receiver, not to be scattered at the area outside the receiver; and therefore the one-step forming preparation of the nonwoven material is realized.
Description
Technical field
But the present invention relates to a kind of manufacturing process of shape control nonwoven material, the directed movement that is specifically related to utilize dual power supply co-controlling fiber belongs to textile material and shapes the field to realize the setting preparation of nonwoven material.
Background technology
Progress and development along with science and technology, textile material broken through traditional take, the Application Areas such as industry cloth, especially with the major impetus that is extended to of the development of nonwoven techniques and nonwoven material, promote the application extension of textile material, extended to gradually the new technical field such as bio-medical, fine filtering, microelectronics, bioengineered tissue.
In the application of new technical field further requirement has been proposed for the plane of textile material or three-dimensional shape and forming effect.For example, textile material is applied to artificial blood vessel, particularly diameter is less than the blood vessel of 6mm, traditional tubulose woven fabric or knitted cloth can't satisfy application requirements at aspects such as antithrombotic property, the rigidity of complying with performance or material, porositys, thereby more employing has the certain surface structure, can satisfy the tubulose nonwoven material that endothelial cell depends on, and require the non-woven blood vessel of tubulose smooth, and can accomplish seamless, seamless bonding and molding; For another example, textile material has also been obtained certain breakthrough in the application facet of biological tissue's timbering material, and the backing material that organization bracket depends on as biological tissue's growth, except needs have be suitable for biological tissue adherent, the differentiation microstructure, also need to have the macroscopical 3-D solid structure that plays biological tissue's monolithic molding effect.
At present, nonwoven material manufacturing process commonly used mainly contains that splicing is sewed up, bonding, the interlayer composite acupuncture is reinforced and the method such as hot forming.Patent " a kind of tubular nonwoven compound material and manufacture method thereof " (publication number CN 101280872A) is made tubular structure by the method that docking is sewed up with non-weaving cloth; Patent " for the manufacture of the method for the fiber composite component of three-dimensional bending " (publication number CN 101232992A), also be to use the method for sewing up, at first non-woven band is carried out three-dimensional according to required profile pleating, then be sewn into and realize three-dimensional on the carrier material; Patent " composite footwear upper and manufacture method thereof " (publication number 1342046), the method that a kind of mould heat pressure is shaped is disclosed, at first reticulated and thermoplastic foam, thermal plastic urethane lamination are formed composite sheet, then with this composite sheet heating, hot forming in mould is made whole, seamless upper of a shoe.The disclosed nonwoven material of above-mentioned patent or composite material for weaving manufacturing process have certain forming effect, but all can't realize by the purpose of spinning to the finished material one step forming.In addition, patent " three-dimensional non-woven medium; filter and processing method " (publication number CN 102002820A), a kind of progressive forming method with non-woven filter core of three-dimensional tubular structure has been described, the method is utilized rotary tubular collector that meltblown fibers is collected at many levels and is realized the progressive forming of non-woven tubular element, but the disclosed processing method of this patent is comparatively complicated, and adaptive surface is wideless.
Summary of the invention
The purpose of this invention is to provide the one step forming method of the controlled nonwoven material of a kind of shape, the method is simple and easy to do, and effect is remarkable.
But a kind of manufacturing process of shape control nonwoven material, comprise that the two dimensional surface shape is controlled and three-dimensional shape is controlled, distribution by the control space electric field, the direction of motion to charged fiber is controlled, realize the point-to-point directed movement of fiber, further realize that the point-to-area or point of fiber is to solid setting deposition, to reach the one step forming purpose.
Concrete grammar is: take electrostatic spinning technique as the basis, be shaped as the stencil design receiver with nonwoven material to be prepared, at receiver access negative high voltage dc source, adopt positive and negative dual power supply co-controlling space electric field to distribute, so that fiber alignment deposit on the receiver with negative voltage, be unlikely to be scattering into receiver zone in addition until be covered with whole receiver, thereby realize the setting preparation of nonwoven material.
Concrete steps are as follows:
(a) high polymer spinning solution or the high polymer molten for preparing placed the spinning solution feedway, and the positive high voltage dc source is connected on the spinning head;
(b) with the template that is shaped as of nonwoven material to be prepared, make the receiver of respective shapes, be fixed in the spinning head dead ahead according to the spinning distance that sets, and connect the negative high voltage dc source;
(c) set spinning solution or melt flow parameter and open syringe pump;
(d) open simultaneously positive high voltage dc source and negative high voltage dc source, the beginning electrostatic spinning carries out the nanofiber setting and collects under the negative high voltage power source effect.
Wherein, the shape of the described material to be prepared of step (b) can be the two dimensional surface shape, also can be 3-D solid structure.
The described negative high voltage dc source of step (b), the excursion of its voltage value is 0 ~ 50kV, the voltage value of loading is decided according to size, shape and receiving range, the spinning head voltage of receiver.The negative value that loads is larger, and is stronger to the control action of fiber alignment motion, but the upper limit of negative value is relevant with receiving range and spinning head positive voltage value, causes that take unlikely the air breakdown discharge is as limit between receiver and the spinning head.
The present invention has realized the one step forming of fiber non-woven material, has shortened manufacturing procedure, and has improved the utilization rate of fiber, and its reason and mechanism that realizes the setting preparation that shape is controlled is soluble as follows:
In the spinning process, highfield makes spinning solution generation polarization and induction charging, forms the fiber jet at the spinning head place, and is moved and be deposited on the receiver to low potential point (receiver) by high voltage (spinning head) under the electric field force effect.Under the collection mode that loads without negative voltage, owing to receiver ground connection is in zero potential point, and the zone around the receiver is in zero potential point equally, and fiber easily is scattered in around the receiver not having significantly selectively in the process of receiver motion.Embodiment of the present invention are for to access negative voltage at receiver, so that receiver has the lower electromotive force in zero potential zone on every side, therefore, the deposition region of nanofiber can have significantly selective, and directed depositing to has on the receiver of low potential more, can not be scattering in the peripheral region.When receiver design was specific shape, nanofiber had been realized the collection that fiber shape is controlled because having depositional plane or the stereochemical structure identical shaped with receiver on the special-shaped receiver of depositing to of orientation.
Owing to having adopted technique scheme, the present invention to have following advantage and effect:
(1) the present invention utilizes positive or negative high voltage static co-controlling space electric field and controls fiber alignment motion, with the receiver with the given shape of negative high voltage electricity fiber is collected, so that the one step forming of the controlled nonwoven material of shape is achieved;
(2) use of negative high voltage static receive mode makes being deposited on the receiver of fiber alignment, is unlikely to fly to receiver, has improved the utilization rate of fiber;
(3) the shaping manufacturing procedure of postorder fibrous felt has been shortened in the realization of the controlled fiber non-woven material of shape one step forming, reduces processing cost.
Description of drawings
Fig. 1 is the design sketch of embodiment 1;
Fig. 2 is the design sketch of embodiment 2;
Fig. 3 is the design sketch of embodiment 3.
The specific embodiment
But the preparation below in conjunction with the orientated deposition of PLA superfine fibre and shape control nonwoven material thereof is described further the solution of the present invention, and following instance is not construed as limiting the invention.
Example 1 PLA superfine fibre orientated deposition
(1) the PLA master batch is placed the material pipe of melt electric spinning equipment, be warming up to 180 degrees centigrade, make the PLA fusing, and the positive high voltage dc source is connected on the spinning head;
(2) be that the circular aluminium foil receiver of 2cm is fixed in 10cm place, syringe needle the place ahead by shown in Fig. 1 (A) with five diameters, wherein the right a slice aluminium foil connects the negative high voltage dc source, forward and backward, left, in four equal good earths of aluminium foil;
(3) setting melt extrusion speed is 0.5ml/h, and opens the melt extrusion unit;
(4) open simultaneously positive and negative high-voltage DC power supply, and respectively setting voltage be+15kv and-5kv, the beginning electrostatic spinning, with high-speed camera shooting fiber deposition process, effect is collected after 10 minutes shown in Fig. 1 (B), effect is shown in Fig. 1 (C).
Can be found out by Fig. 1 (B) and Fig. 1 (C), after the fiber jet is formed by the spinneret orifice place, deflection has the more receiver motion of low potential significantly, and optionally deposits on the receiver that is connected to negative voltage, thereby realizes the orientation control of fiber movement direction.
Example 2 polyacrylonitrile nanofibers setting deposition
(1) polyacrylonitrile is dissolved in the dimethyl formamide (DMF), is mixed with mass fraction and is 10% spinning solution, measure 20ml and place in the syringe, and be loaded on the micro-injection pump, the positive high voltage dc source is received on the syringe needle;
(2) aluminium foil is cut into pentalpha and is fixed in 20cm place, spinning head the place ahead as receiver;
(3) setting injection of solution speed is 0.3ml/h, opens syringe pump;
(4) with receiver ground connection, and open the positive high voltage dc source, setting voltage is+20kv beginning electrostatic spinning, effect such as Fig. 2 (A) behind the collection 1h;
(5) the negative high voltage dc source is connected on the receiver, opens simultaneously positive and negative high-voltage DC power supply, respectively setting voltage be+20kv and-2kv, beginning electrostatic spinning, effect such as Fig. 2 (B) behind the collection 1h;
Comparison diagram 2(A) and Fig. 2 (B), when single supply control electrostatic spinning, receiver does not have bound to the collection of fiber, after fiber is covered with receiver, because zone and receiver around the receiver are in zero potential point equally, thereby fiber can be scattering into the zone beyond the receiver edge, shown in Fig. 2 (A); When by dual power supply co-controlling electrostatic spinning, shown in Fig. 2 (B), after being formed by the spinneret orifice place, the fiber jet can directionally deposit on the receiver with negative voltage, overflow the edge and be scattering into the peripheral region and be unlikely to large tracts of land, collection process through certain hour, fiber has the shape identical with receiver because being covered with whole receiver, thereby realizes the purpose that the fiber setting is collected.
Example 3 PLA superfine fiber stereoscopics are shaped
(1) the PLA master batch is placed the material pipe of melt electric spinning equipment, be warming up to 180 degrees centigrade, make the PLA fusing, and the positive high voltage dc source is connected on the spinning head
(2) Aluminium Foil Package is rolled in makes simple and easy cylindrical receiver on the earthenware that diameter is 30mm and be fixed in 8cm place, spinning head the place ahead;
(3) setting melt extrusion speed is 0.5ml/h, opens the melt extrusion unit;
(4) the negative high voltage dc source is connected on the receiver, opens simultaneously positive and negative high-voltage DC power supply, respectively setting voltage be+14kv and-4kv, beginning electrostatic spinning, effect such as Fig. 3 behind the collection 10min.
Claims (4)
1. but the manufacturing process of a shape control nonwoven material adopts electrospinning process, it is characterized in that: with required nonwoven material be shaped as the stencil design receiver, be connected to the negative high voltage dc source on the described receiver.
2. but the manufacturing process of a kind of shape control nonwoven material as claimed in claim 1, it is characterized in that: described negative high voltage dc source, the excursion of its voltage value is 0 ~ 50kV, causes that take unlikely the air breakdown discharge is as limit between receiver and the spinning head.
3. but the manufacturing process of a kind of shape control nonwoven material as claimed in claim 1, it is characterized in that: the shape of described required nonwoven material is two dimensional surface shape or three-dimensional shape.
4. but such as the manufacturing process of each described a kind of shape control nonwoven material of claim 1-3, it is characterized in that described electrospinning process is:
(1) spinning solution or the melt for preparing placed the spinning solution feedway, and the positive high voltage dc source is connected on the spinning head;
(2) receiver is fixed in the spinning head dead ahead according to the spinning distance that sets;
(3) set spinning solution or melt flow parameter and open syringe pump;
(4) open the positive high voltage dc source, the beginning electrostatic spinning.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310004708XA CN103074738A (en) | 2013-01-07 | 2013-01-07 | Method for forming shape-controllable nonwoven material |
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| CN201310004708XA CN103074738A (en) | 2013-01-07 | 2013-01-07 | Method for forming shape-controllable nonwoven material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016095824A1 (en) * | 2014-12-18 | 2016-06-23 | 上海微创医疗器械（集团）有限公司 | Anti-infective dressing bag and fabricating method therefor |
| CN105709280A (en) * | 2014-12-18 | 2016-06-29 | 上海微创医疗器械（集团）有限公司 | Anti-infection covering bag and preparation method thereof |
Citations (4)
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| CN1456716A (en) * | 2003-06-10 | 2003-11-19 | 清华大学 | Device and method for preparing tissue engineering supporting materials by electric spinning |
| WO2008069759A1 (en) * | 2006-12-05 | 2008-06-12 | Nanyang Technological University | Manufacturing three-dimensional scaffolds using electrospinning at low temperatures |
| CN101664346A (en) * | 2009-09-02 | 2010-03-10 | 南通大学 | Artificial nerve graft prepared by electrostatic spinning and preparation method and special device thereof |
| WO2010112564A1 (en) * | 2009-04-01 | 2010-10-07 | Centro De Estudios E Investigaciones Técnicas De Gipuzkoa | Template-supported method of forming patterns of nanofibers in the electrospinning process and uses of said nanofibers |
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2013
- 2013-01-07 CN CN201310004708XA patent/CN103074738A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1456716A (en) * | 2003-06-10 | 2003-11-19 | 清华大学 | Device and method for preparing tissue engineering supporting materials by electric spinning |
| WO2008069759A1 (en) * | 2006-12-05 | 2008-06-12 | Nanyang Technological University | Manufacturing three-dimensional scaffolds using electrospinning at low temperatures |
| WO2010112564A1 (en) * | 2009-04-01 | 2010-10-07 | Centro De Estudios E Investigaciones Técnicas De Gipuzkoa | Template-supported method of forming patterns of nanofibers in the electrospinning process and uses of said nanofibers |
| CN101664346A (en) * | 2009-09-02 | 2010-03-10 | 南通大学 | Artificial nerve graft prepared by electrostatic spinning and preparation method and special device thereof |
Non-Patent Citations (1)
| Title |
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| 张大省等: "《超细纤维生产技术及应用》", 31 January 2007, article "超细纤维生产技术及应用", pages: 368-370 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016095824A1 (en) * | 2014-12-18 | 2016-06-23 | 上海微创医疗器械（集团）有限公司 | Anti-infective dressing bag and fabricating method therefor |
| CN105709280A (en) * | 2014-12-18 | 2016-06-29 | 上海微创医疗器械（集团）有限公司 | Anti-infection covering bag and preparation method thereof |
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Application publication date: 20130501 |