CN210585390U - Plastic film high-voltage electret charging device - Google Patents
Plastic film high-voltage electret charging device Download PDFInfo
- Publication number
- CN210585390U CN210585390U CN201920882916.2U CN201920882916U CN210585390U CN 210585390 U CN210585390 U CN 210585390U CN 201920882916 U CN201920882916 U CN 201920882916U CN 210585390 U CN210585390 U CN 210585390U
- Authority
- CN
- China
- Prior art keywords
- electret
- plate
- arc
- roller
- voltage
- 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.)
- Active
Links
Images
Landscapes
- Elimination Of Static Electricity (AREA)
Abstract
The utility model provides a plastic film high pressure electret charging device, includes electret roller, arc electret plate, locates grid polar plate, unwinding device, the coiling mechanism that can reciprocate between electret roller and the arc electret plate and locates a plurality of deflector roll of electret roller both sides, the electret roller include: the device comprises a first electret roller and a second electret roller, wherein the arc electret plate comprises a first arc electret plate and a second arc electret plate, the first arc electret plate is arranged above or below the first electret roller, the second arc electret plate is arranged above the second electret roller, and two compression rollers are arranged between the second arc electret plate and a winding device. The utility model has the advantages of easy operation, stable physical and mechanical properties, low environmental dependence, stable charge storage capacity, water resistance, cleaning and slow attenuation speed.
Description
Technical Field
The utility model relates to an electret charging device, concretely relates to plastic film high pressure electret charging device.
Background
An electret material is a dielectric material that has a quasi-permanent charge or dipole. The electret generates internal and external electric fields and is the electrostatic equivalent of a permanent magnet. The polymer electret can be made into a flexible film and has excellent charge storage capacity, and can be made into high-quality and high-quality electroacoustic devices such as filter covers, acoustic materials, printed substrates, measuring devices or remote control switches and the like, thereby having great development prospect.
The traditional electret is obtained by heating a polymer in a direct-current high-voltage electric field to a temperature above the glass transition temperature or even a melting point, cooling and solidifying the polymer due to atomic polarization, molecular dipole polarization and injection of space charges, and removing the electric field. The mode not only needs to preheat the material in advance and consumes a large amount of electric energy, but also the space charge is easily influenced by the environment such as temperature, humidity and the like, and is further quickly attenuated; an electret corona charger (CN200920113355.6) adopts a string parallel to a conductive roller as an electret discharge electrode, and in a gap between the string and the conductive roller, the electric field intensity near the surface of the string close to the conductive roller is the largest, so that corona discharge is generated firstly, and a power line near the roller is very sparse, so that corona is not generated; only when the voltage is high enough will the string produce a spark discharge, which in turn causes an arc discharge. The equipment has higher requirement on the electret voltage, otherwise, the electret effect is not ideal when the voltage is lower; the invention patent (CN201410575799.7) is a non-woven fabric electrostatic electret device, which adopts a metal electret plate as a discharge electrode and also needs high electret voltage to cause arc discharge; in addition, when the electret material moves horizontally along the cloth guide roller, the material is subjected to a large internal tension, so that the material is easy to deform, and the product quality and the electret effect cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the weak point among the prior art, provide a plastic film high pressure electret charging device that the operation is simple and easy, physical mechanical properties is stable, the environment dependence is low, the charge storage volume is stable, water-fast washing and clean, decay rate is slow.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model provides a plastic film high pressure electret charging device, includes electret roller, arc electret plate, locates grid polar plate, unwinding device, the coiling mechanism that can reciprocate between electret roller and the arc electret plate and locates a plurality of deflector roll of electret roller both sides, the electret roller include: the device comprises a first electret roller and a second electret roller, wherein the arc electret plate comprises a first arc electret plate and a second arc electret plate, the first arc electret plate is arranged above or below the first electret roller, the second arc electret plate is arranged above the second electret roller, and two press rollers are arranged between the second arc electret plate and a winding device;
preferably, the first arc-shaped pole holding plate and the second arc-shaped pole holding plate are respectively provided with an insulating protective cover at the outer part, and the first arc-shaped pole holding plate and the second arc-shaped pole holding plate are respectively provided with metal needle assemblies arranged in a grid shape at the inner part;
preferably, the metal needle assembly comprises a plurality of metal needles, the length of each metal needle is 10-20 MM, the length of the needle point of each metal needle is 0.5-2 MM, and the distance between the needle points of two adjacent metal needles is 2CM x 2 CM-5 CM x 5 CM;
preferably, the first electret roller, the second electret roller, the guide roller and the press roller are all of a structure with an inner layer of a metal round roller and an outer layer of insulating glue;
preferably, the insulating glue is a single layer or a composite layer, and the thickness of the insulating glue is 2-10 MM;
preferably, the grid plate is a quadrilateral metal mesh, and the radian of the grid plate is between 30 and 180 degrees;
preferably, the unwinding device is provided with a brake device.
Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:
the utility model discloses an outer cladding insulating cement to traditional metal electret roller, deflector roll has avoided at the electret in-process, and a large amount of charges on first electret roller and the second electret roller with the electret material are led away, have strengthened the stability of charge storage on the electret material, have also saved a large amount of energy consumptions. Meanwhile, in the electret process, a metal mesh grid plate with a quadrilateral radian of 30-180 degrees is arranged between the first electret roller and the second electret roller and between the first arc-shaped electret plate and the second arc-shaped electret plate, and the voltage polarity of the metal mesh grid plate is the same as that of the first arc-shaped electret plate and that of the second arc-shaped electret plate; when the first arc-shaped electret plate, the second arc-shaped electret plate and the surface of the electret material have potential difference, ions passing through the grid plate drift to the surface of the electret material along a potential line and are captured by a potential well in the electret material to form surface charges, so that the potentials of the electret material and the grid plate are gradually close to each other until the potential of the surface of the electret material is consistent with the potential of the grid plate, the potential line generated between the electret material and the grid plate disappears, the charges are not increased on the surface of the electret material, namely the electret material is charged to saturation, the uniformity of the surface potential of the electret material can be improved, and the needle point voltage of the metal needle is only used for providing more charged ions, so that the change of the needle point voltage of the metal needle cannot generate obvious influence on the electret charging process, and the attenuation speed is slow. In addition, in the electret process, the unwinding device, the compression roller and the winding device are linked, so that the tension applied to the electret material in the traction process is proper and stable, the electret material is not easy to deform, the physical and mechanical properties of the electret material are not affected, the environment dependence is low, the electret material is resistant to water washing and wiping, and the electret material is simple to operate in the whole electret process;
to sum up, the utility model has the advantages of the operation is simple and easy, and physical mechanical properties is stable, and the environmental dependence is low, and the charge memory space is stable, and resistant washing and cleaning, decay rate are slow.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the present invention.
Detailed Description
The direction of the arrow is the direction of movement of the electret material 9.
Example 1
As shown in fig. 1, the utility model discloses a plastic film high pressure electret charging device, including electret roller, arc electret plate, locate grid polar plate 3, unwinding device 4, coiling mechanism 5 that can reciprocate between electret roller and the arc electret plate and locate a plurality of deflector roll 6 of electret roller both sides, the electret roller include: the device comprises a first electret roller 1-1 and a second electret roller 1-2, wherein the arc electret plate comprises a first arc electret plate 2-1 and a second arc electret plate 2-2, the first arc electret plate 2-1 is arranged below the first electret roller 1-1, the second arc electret plate 2-2 is arranged above the second electret roller 1-2, and two press rollers 7 are arranged between the second arc electret plate 2-2 and a winding device 5;
insulating protective covers are arranged outside the first arc-shaped electret plate 2-1 and the second arc-shaped electret plate 2-2, and metal needle assemblies arranged in a grid shape are arranged inside the first arc-shaped electret plate 2-1 and the second arc-shaped electret plate 2-2;
the metal needle assembly comprises a plurality of metal needles, the length of each metal needle is 10-20 MM, the length of the needle point of each metal needle is 0.5-2 MM, the distance between the needle points of two adjacent metal needles is 2CM x 2 CM-5 CM x 5CM, wherein the length of the selected metal needle is 20MM, the length of the needle point of each metal needle is 2MM, and the distance between the needle points of two adjacent metal needles is 3CM x 3 CM;
the first electret roller 1-1, the second electret roller 1-2, the guide roller 6 and the press roller 7 are all of a structure with an inner layer of a metal round roller and an outer layer of insulating glue; the utility model discloses an arc electret plate mounting bracket of pneumatic cylinder is arranged in at the both ends of first arc electret plate 2-1 and second arc electret plate 2-2, and the both ends of arc electret plate mounting bracket link has servo motor, through PLC control system accurate control first arc electret plate 2-1 and second arc electret plate 2-2 oscilaltion distance to adjust the first electret roller 1-1 and second electret roller 1-2 and the interval between first arc electret plate 2-1 and second arc electret plate 2-2, change the static electret distance of material finally; the first arc-shaped electret plate 2-1 arranged below the first electret roller 1-1 is also connected with a high-voltage electrostatic generator, the high-voltage electrostatic generator generates 10KV high-voltage electricity, and the high-voltage electrostatic generator can also generate any high-voltage electricity of 5 KV-40 KV; the second arc-shaped electret plate 2-2 arranged above the second electret roller 1-2 is also connected with a high-voltage electrostatic generator, the high-voltage electrostatic generator generates-10 KV high-voltage electricity, and the high-voltage electrostatic generator can also generate any high-voltage electricity of-40 KV to-5 KV; high voltage electricity is transmitted through the high voltage electrostatic metal needle assembly on the first arc-shaped electret plate 2-1 and the second arc-shaped electret plate 2-2, high voltage electricity is released to the electret material 9 in the transmission process in a short time, and high voltage electret treatment is carried out on the electret material 9, so that the electret material 9 becomes a permanently charged electret;
the first electret roller 1-1 and the second electret roller 1-2 are arranged on the electret roller mounting frame, servo motors are connected to two ends of the electret roller mounting frame, the rotating speed and the rotating direction of the rollers are accurately controlled through a PLC control system, and in the electret process, high-voltage breakdown air can continuously release ozone, so that the air is irritating and harm is caused to human bodies, therefore, preferably, gas collecting devices are arranged below the first electret roller 1-1 and the second electret roller 1-2, and collected nitrogen oxides, ozone and the like are led into treatment liquid to be decomposed and purified. The gas collecting device is a commonly used centrifugal fan gas collecting device which is common and is not shown in the attached drawings.
Wherein, the deflector roll 6 arrange in on 6 mounting brackets of deflector roll, 6 mounting bracket sliders of deflector roll and guide rail are installed at 6 mounting brackets both ends of deflector roll to control 6 up-and-down movements of deflector roll.
The compression rollers 7 are provided with pneumatic cylinders, one compression roller 7 is connected with the winding device 5 through a belt, so that the compression rollers 7 and the winding device 5 are synchronous in speed, the material winding tension can be controlled conveniently, and the material can be prevented from forming wrinkles during winding through the pressure of the cylinders;
the insulating glue is a single layer or a composite layer, the thickness of the insulating glue is 2-10 MM, and the insulating glue can be one or more of polyurethane elastomer, silicon rubber, nitrile rubber, ethylene propylene rubber and chloroprene rubber;
the grid plate 3 is a quadrilateral metal mesh, the radian of the grid plate 3 is between 30 and 180 degrees, the grid plate 3 is connected with a matched high-voltage electrostatic generator through a lead, and the grid plate 3, the first arc-shaped static plate 2-1 and the second arc-shaped static plate 2-2 are connected with the same-polarity voltage;
be equipped with brake equipment on unwinding device 4, can prevent to close the utility model discloses the time, unwinding device 4 inertia emits electret material 9.
Example 2
As shown in fig. 2, the utility model discloses a plastic film high pressure electret charging device, including electret roller, arc electret plate, locate grid polar plate 3, unwinding device 4, coiling mechanism 5 that can reciprocate between electret roller and the arc electret plate and locate a plurality of deflector roll 6 of electret roller both sides, the electret roller include: the device comprises a first electret roller 1-1 and a second electret roller 1-2, wherein the arc electret plate comprises a first arc electret plate 2-1 and a second arc electret plate 2-2, the first arc electret plate 2-1 is arranged above the first electret roller 1-1, the second arc electret plate 2-2 is arranged above the second electret roller 1-2, and two press rollers 7 are arranged between the second arc electret plate 2-2 and a winding device 5;
insulating protective covers are arranged outside the first arc-shaped electret plate 2-1 and the second arc-shaped electret plate 2-2, and metal needle assemblies arranged in a grid shape are arranged inside the first arc-shaped electret plate 2-1 and the second arc-shaped electret plate 2-2;
the metal needle assembly comprises a plurality of metal needles, the length of each metal needle is 10-20 MM, the length of the needle point of each metal needle is 0.5-2 MM, the distance between the needle points of two adjacent metal needles is 2CM x 2 CM-5 CM x 5CM, wherein the length of the selected metal needle is 20MM, the length of the needle point of each metal needle is 2MM, and the distance between the needle points of two adjacent metal needles is 3CM x 3 CM;
the first electret roller 1-1, the second electret roller 1-2, the guide roller 6 and the press roller 7 are all of a structure with an inner layer of a metal round roller and an outer layer of insulating glue; the utility model discloses an arc electret plate mounting bracket of pneumatic cylinder is arranged in at the both ends of first arc electret plate 2-1 and second arc electret plate 2-2, and the both ends of arc electret plate mounting bracket link has servo motor, through PLC control system accurate control first arc electret plate 2-1 and second arc electret plate 2-2 oscilaltion distance to adjust the first electret roller 1-1 and second electret roller 1-2 and the interval between first arc electret plate 2-1 and second arc electret plate 2-2, change the static electret distance of material finally; the first arc-shaped electret plate 2-1 arranged below the first electret roller 1-1 is also connected with a high-voltage electrostatic generator, the high-voltage electrostatic generator generates 10KV high-voltage electricity, and the high-voltage electrostatic generator can also generate any high-voltage electricity of 5 KV-40 KV; the second arc-shaped electret plate 2-2 arranged above the second electret roller 1-2 is also connected with a high-voltage electrostatic generator, the high-voltage electrostatic generator generates-10 KV high-voltage electricity, and the high-voltage electrostatic generator can also generate any high-voltage electricity of-40 KV to-5 KV; high voltage electricity is transmitted through the high voltage electrostatic metal needle assembly on the first arc-shaped electret plate 2-1 and the second arc-shaped electret plate 2-2, high voltage electricity is released to the electret material 9 in the transmission process in a short time, and high voltage electret treatment is carried out on the electret material 9, so that the electret material 9 becomes a permanently charged electret;
the first electret roller 1-1 and the second electret roller 1-2 are arranged on the electret roller mounting frame, servo motors are connected to two ends of the electret roller mounting frame, the rotating speed and the rotating direction of the rollers are accurately controlled through a PLC control system, and in the electret process, high-voltage breakdown air can continuously release ozone, so that the air is irritating and harm is caused to human bodies, therefore, preferably, gas collecting devices are arranged below the first electret roller 1-1 and the second electret roller 1-2, and collected nitrogen oxides, ozone and the like are led into treatment liquid to be decomposed and purified. The gas collecting device is a commonly used centrifugal fan gas collecting device which is common and is not shown in the attached drawings.
The guide roller 6 is arranged on the guide roller 6 mounting frame, and the guide roller 6 mounting frame sliding block and the guide rail are arranged at two ends of the guide roller 6 mounting frame so as to control the guide roller 6 to move up and down;
the compression rollers 7 are provided with pneumatic cylinders, one compression roller 7 is connected with the winding device 5 through a belt, so that the compression rollers 7 and the winding device 5 are synchronous in speed, the material winding tension can be controlled conveniently, and the material can be prevented from forming wrinkles during winding through the pressure of the cylinders;
the insulating glue is a single layer or a composite layer, the thickness of the insulating glue is 2-10 MM, and the insulating glue can be one or more of polyurethane elastomer, silicon rubber, nitrile rubber, ethylene propylene rubber and chloroprene rubber;
the grid plate 3 is a quadrilateral metal mesh, the radian of the grid plate 3 is between 30 and 180 degrees, the grid plate 3 is connected with a matched high-voltage electrostatic generator through a lead, and the grid plate 3, the first arc-shaped static plate 2-1 and the second arc-shaped static plate 2-2 are connected with the same-polarity voltage;
be equipped with brake equipment on unwinding device 4, can prevent to close the utility model discloses the time, unwinding device 4 inertia emits electret material 9.
The utility model discloses a concrete use as follows:
use the utility model discloses the time, with the utility model discloses independent motor control in the supporting device that uses starts with the utility model discloses supporting device, the running speed of each device of PLC control system accurate control starts the utility model discloses the time, electret material 9 is emitted by unwinding device 4, through deflector roll 6, leads in first electret roller 1-1, passes through another deflector roll 6 again, leads in second electret roller 1-2, passes through next deflector roll 6 and compression roller 7 and gets into coiling device 5, becomes the coiled material by coiling device 5 rolling. Wherein, the first arc-shaped electret plate 2-1, the second arc-shaped electret plate 2-2 and the grid plate 3 connected with the high-voltage electrostatic generator are communicated with the same polarity voltage, the voltage released by the metal needle is far larger than the voltage of the grid plate 3, the voltage released by the metal needle on the first arc-shaped electret plate 2-1 and the second arc-shaped electret plate 2-2 can provide a large amount of charged ions, the charged ions can drift to the surface of the electret material 9 along the potential line when the potential exists between the grid plate 3 and the electret material 9, and are captured by the potential well in the electret material 9 to form surface charge, so that the potentials of the electret material 9 and the grid plate 3 gradually approach to each other until the potential of the surface of the electret material 9 is consistent with the grid plate 3, the potential line generated between the electret material 9 disappears, the electret material 9 is charged to be saturated, thus improving the uniformity of the surface potential of the electret material 9, a permanently charged electret material is formed. Simultaneously, unwinding device 4, compression roller 7, coiling mechanism 5 that are equipped with pass through the linkage of PLC control system, make electret material 9 in traction process, and the tension that receives is suitable and stable, has guaranteed that electret material 9 is difficult for appearing deformation, and physical properties is not destroyed, if electret material 9 (film) is producing the back, is taking advantage of and has the waste heat, carries out polarization in succession, and the effect is better, just the utility model discloses also be applicable to the preparation that also is applicable to non-woven fabrics electrets such as air filtration material.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any form, and all of the technical matters of the present invention belong to the protection scope of the present invention to any simple modification, equivalent change and modification made by the above embodiments.
Claims (7)
1. A plastic film high-voltage electret charging device is characterized in that: including electret roller, arc electret plate, locate grid polar plate, unwinding device, the coiling mechanism that can reciprocate between electret roller and the arc electret plate and locate a plurality of deflector roll of electret roller both sides, the electret roller include: the device comprises a first electret roller and a second electret roller, wherein the arc electret plate comprises a first arc electret plate and a second arc electret plate, the first arc electret plate is arranged above or below the first electret roller, the second arc electret plate is arranged above the second electret roller, and two compression rollers are arranged between the second arc electret plate and a winding device.
2. The plastic film high-voltage electret charging device according to claim 1, wherein: and insulating protective covers are arranged outside the first arc-shaped electret plate and the second arc-shaped electret plate, and metal needle assemblies arranged in a grid shape are arranged inside the first arc-shaped electret plate and the second arc-shaped electret plate.
3. The plastic film high-voltage electret charging device according to claim 2, wherein: the metal needle assembly comprises a plurality of metal needles, the length of each metal needle is 10-20 MM, the length of the needle point of each metal needle is 0.5-2 MM, and the distance between the needle points of two adjacent metal needles is 2CM x 2 CM-5 CM x 5 CM.
4. The plastic film high-voltage electret charging device according to claim 1, wherein: the first electret roller, the second electret roller, the guide roller and the press roller are all of a structure that the inner layer is a metal round roller and the outer layer is insulating glue.
5. The plastic film high-voltage electret charging device according to claim 4, wherein: the insulating glue is a single layer or a composite layer, and the thickness of the insulating glue is 2-10 MM.
6. The plastic film high-voltage electret charging device according to claim 1, wherein: the grid plate is a quadrilateral metal mesh, and the radian of the grid plate is between 30 and 180 degrees.
7. The plastic film high-voltage electret charging device according to claim 1, wherein: and the unwinding device is provided with a brake device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920882916.2U CN210585390U (en) | 2019-06-12 | 2019-06-12 | Plastic film high-voltage electret charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920882916.2U CN210585390U (en) | 2019-06-12 | 2019-06-12 | Plastic film high-voltage electret charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210585390U true CN210585390U (en) | 2020-05-22 |
Family
ID=70715288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920882916.2U Active CN210585390U (en) | 2019-06-12 | 2019-06-12 | Plastic film high-voltage electret charging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210585390U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111876994A (en) * | 2020-09-01 | 2020-11-03 | 苏州金纬化纤工程技术有限公司 | Melt-blown electrostatic electret equipment |
| CN112458744A (en) * | 2020-11-18 | 2021-03-09 | 江阴市华西新材料科技有限公司 | Online electrostatic electret device and electrostatic electret process thereof |
| CN112796094A (en) * | 2020-12-15 | 2021-05-14 | 广东金发科技有限公司 | Corona electret device capable of resisting charge attenuation and application method |
-
2019
- 2019-06-12 CN CN201920882916.2U patent/CN210585390U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111876994A (en) * | 2020-09-01 | 2020-11-03 | 苏州金纬化纤工程技术有限公司 | Melt-blown electrostatic electret equipment |
| CN112458744A (en) * | 2020-11-18 | 2021-03-09 | 江阴市华西新材料科技有限公司 | Online electrostatic electret device and electrostatic electret process thereof |
| CN112796094A (en) * | 2020-12-15 | 2021-05-14 | 广东金发科技有限公司 | Corona electret device capable of resisting charge attenuation and application method |
| CN112796094B (en) * | 2020-12-15 | 2023-06-06 | 广东金发科技有限公司 | Corona electret equipment capable of resisting charge attenuation and application method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210585390U (en) | Plastic film high-voltage electret charging device | |
| Kilic et al. | The charging and stability of electret filters | |
| CN207998746U (en) | A kind of non-woven material tow sides electrostatic electret device simultaneously | |
| CN103215660B (en) | Electrospun nano-fibers equipment | |
| CA2037942A1 (en) | Process for producing an electret, a film electret, and an electret filter | |
| EP2931951A1 (en) | Method for production of polymeric nanofibers by spinning of solution or melt of polymer in electric field, and a linear formation from polymeric nanofibers prepared by this method | |
| CN111447721A (en) | Pulsed plasma electret equipment and method | |
| CN209412592U (en) | A kind of hot Corona charge device | |
| CN107442269A (en) | Ion purifier | |
| CN202961289U (en) | Ionic wind purifier capable of reducing noise | |
| CN111876994A (en) | Melt-blown electrostatic electret equipment | |
| KR102087722B1 (en) | Filter module for fine dust removal and air cleaning system for fine dust removal | |
| JP2018051507A (en) | Electric dust collector | |
| CN206838313U (en) | A kind of electrostatic filter | |
| CN204011486U (en) | Micropore piezo-electric electret thin film assembly volume to volume continuous polarization device | |
| CN106978670A (en) | The Nanofiber filter net and its preparation facilities of a kind of recycling, method | |
| CN205474547U (en) | Two -sided two equipment in utmost point of non -weaving cloth | |
| CN211431149U (en) | Electret synergistic instrument for enhancing filtering effect of mask and mask machine comprising electret synergistic instrument | |
| Zhou et al. | Nanosecond pulse corona charging of polymers | |
| CN104328515A (en) | Online electret receiving device of non-woven fabric | |
| CN214459125U (en) | Electrostatic device for melt-blown fabric | |
| CN112796094A (en) | Corona electret device capable of resisting charge attenuation and application method | |
| KR101400938B1 (en) | Manufacturing method of medical mask filter | |
| CN110901200A (en) | PVDC film electrostatic compounding device and compounding method | |
| CN203370759U (en) | Dust and static removal papermaking rewinding device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |