CN1016911B - Film with high dielectric constant and low dielectric loss - Google Patents
Film with high dielectric constant and low dielectric lossInfo
- Publication number
- CN1016911B CN1016911B CN 90102967 CN90102967A CN1016911B CN 1016911 B CN1016911 B CN 1016911B CN 90102967 CN90102967 CN 90102967 CN 90102967 A CN90102967 A CN 90102967A CN 1016911 B CN1016911 B CN 1016911B
- Authority
- CN
- China
- Prior art keywords
- film
- dielectric constant
- butadiene rubber
- polypropylene
- dielectric loss
- 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.)
- Expired
Links
Abstract
The present invention relates to a film with high dielectric constant and low dielectric loss, which belongs to a high molecular polymer blending film material used for making capacitors and insulation materials in the electric industry. The high molecular blending material is prepared by mixing polypropylene and nitrile-butadiene rubber in a mixing roll, wherein the content of nitrile in the nitrile-butadiene rubber is from 26 to 35%. Finally, various films meeting the specification are prepared by moulding or extruding calendering and stretching the prepared blending material in a bidirectional mode after the blending material is crushed. Through testing, the dielectric constant of the film is as high as 4.21, the dielectric loss is below 3 * 10<-3>, and the film has favorable processing performance. The volume of a capacitor made of the film of the present invention is reduced by 54%.
Description
Film with high dielectric constant and low dielectric loss of the present invention belongs to the high molecular polymer blending and modifying thin-film material that capacitor and insulating material are made in electric utility.
The miniaturization of the capacitor of one of electronic component, big capacity are the key subjects in the electronics industry.People are often from reducing film thickness; Develop novel high polymer material and will have industrial polymer modification equal angles now and address.In recent years, China successively introduces several electron membrane production lines, though expensive several ten million, but still do not reach satisfied technic index, whenever reduce 1 μ thickness simultaneously, even use import equipment and raw material, also must expend lot of manpower and material resources, also film thickness reduce always limited.Electronics industry is the most frequently used thin-film material such as polypropylene at present, terylene etc., and their dielectric constant is all lower, under this limited condition, even reduce film thickness significantly, also is difficult to satisfy the needs of capacitor miniaturization.The theoretical foundation that studies for a long period of time according to the country of advanced technology such as Japan, the U.S., France shows, have only high dielectric constant and low dielectric loss to be met simultaneously and easy material processed, could finally make the capacitor of making reach miniaturization and big capacity requirement.
United States Patent (USP) (US4353107) uses isotactic polypropylene and isotactic PB Polybutene-1 mixture to precipitate in hot toluene solution, press membrane under vacuum condition then, metallize with traditional technology of aluminizing again, resulting metallized film is formed capacitor by bidirectional oriented stretching and sheet metal, though it has possessed necessary low-dielectric loss performance under high-tension current, but its dielectric constant has only 2.48-2.54, so the capacitor made from this film can not reach the big capacity requirement of miniaturization.
British patent (GB1460183) provides relevant heat resistance technology with polypropylene and the compound capacitor that makes of mylar.That is to be formed by coiling simultaneously by the size that two-sided all metallized dacron membrane and non-metallic polypropylene film combine according to the rules.Though its heat resistance is improved, its dielectric constant still can not be improved.
European patent (EP0060035A
1) a kind of film with the tertiary blending material development is provided.Wherein containing thermoplastic resin is 40-97%, and pottery is the carbon black of 2-50% and 1-25%.Though its dielectric constant of this dielectric film is improved, owing in thermoplastic resin, added two kinds of inorganic fillers, so influenced its processing characteristics greatly.
The objective of the invention is to develop a kind of dielectric film that possesses the low dielectric loss of high dielectric constant two specific characters simultaneously, and technology is simple, the employing domestic raw material.
Realize that the solution of the present invention is to adopt homemade general film-grade polypropylene and two kinds of raw materials of acrylonitrile-butadiene rubber (nitrile content 26-35%), carry out mixingly with blend method that make dielectric constant and reach 4.21, dielectric loss is not higher than 3 * 10
-3High dielectric constant and the dielectric film of low dielectric loss.Concrete steps are:
Earlier polypropylene and acrylonitrile-butadiene rubber are removed impurity, dehumidifying respectively, be that the polypropylene of 60-80% added earlier in the mixing roll mixing 10-15 minute then with percentage by weight, acrylonitrile-butadiene rubber continuation abundant mixing the under 180-190 ℃ of temperature that adds the second component 20-40% again made blend in 8-10 minute, then with its fragmentation, with mold pressing or extrusion calendaring, and the method for biaxial tension is made the film of all size thickness.Homemade polypropylene of the present invention, the dielectric constant of itself has only 2.2-2.3, its dielectric constant of another component acrylonitrile-butadiene rubber (nitrile content 26-35%) is up to 13, and two groups of acrylonitrile and butadiene are arranged in good heat resistance, especially its macromolecular chain, wherein itrile group is the very strong group of a kind of polarity, it is big to the dielectric constant contribution of blend composition, and butadiene is a soft group, and it and polypropylene have good compatibility, makes intermingling material have good homogeneous.
High dielectric constant and low dielectric loss film of the present invention has following advantage:
1. the film that makes of the present invention has high dielectric constant and low dielectric loss two specific characters, at room temperature, and 100H
zIt is more than 4.21 that frequency records its dielectric constant, dielectric loss 3 * 10
-3Compare nearly one times of raising with the dielectric constant 2.2 of the polypropylene film material of using always, therefore under the identical condition of capacity, the capacitor volume reduces 54% to the capacitor made from the present invention (paper tinsel formula electrode noninductive winding or metallic electrode), has reached the jumbo requirement of miniaturization.
2. the thin-film material that makes of the present invention good processing properties is not only arranged, and mechanical tensile strength meets electronic component membrane material standard.
3. the thin-film material that makes of the present invention, the capacitor that not only can make to have special-effect, and because reducing of volume reduces cost, good in economic efficiency.
4. the used raw material of the present invention is domestic production all, and technology is simple, and is easy to operate, do not produce pollution, easy to utilize.
Embodiment:
With the polypropylene of 65-70% as first component, remove impurity before the use, dehumidifying.The acrylonitrile-butadiene rubber (nitrile content 26-35%) of 30-35% as second component, is removed impurity, dehumidifying, broken glue before using.Earlier first component polypropylene (film-grade) pellet was added in the Brabender mixing roll mixing 15 minutes, and added the second component acrylonitrile-butadiene rubber then and fully mixed 10 minutes, 85 ℃ of mixing temperatures promptly get the intermingling material product of high dielectric constant and low dielectric loss.
Carry out mold pressing or methods such as extrusion calendaring and biaxial tension with the products obtained therefrom fragmentation, under 190 ℃ of temperature and make the film of all size thickness.
With the polypropylene of 70-75% as first component, remove impurity, dehumidifying before using.25-30% acrylonitrile-butadiene rubber (nitrile content 26-35%) as second component, is removed impurity, dehumidifying, broken glue before using.Above-mentioned polypropylene granules was added in the Brabender mixing roll mixing 10 minutes, 190 ℃ of melting temperatures, then acrylonitrile-butadiene rubber is added carry out mixing, fully mix after 8 minutes product.This product is through making the film of all size thickness with methods such as mold pressing or extrusion calendaring and biaxial tensiones under 190 ℃ of temperature after the fragmentation.
Claims (2)
1, a kind of high dielectric constant and low dielectric loss film that is used for capacitor is characterized in that the film be made up of the acrylonitrile-butadiene rubber of 60～80% polypropylene and 20～40%, described acrylonitrile-butadiene rubber, and wherein the content of nitrile is 26～35%.
2, a kind of manufacturing is used for the method for the high dielectric constant and low dielectric loss film of capacitor, it is characterized in that: earlier polypropylene and acrylonitrile-butadiene rubber are removed impurity, dehumidifying, broken glue respectively, be that 60～80% polypropylene added earlier in the mixing roll mixing 10～15 minutes then with percentage by weight, acrylonitrile-butadiene rubber continuation abundant mixing the under 180 ℃～190 ℃ temperature that adds second component, 20～40% percentage by weights again made blend in 9～10 minutes, then with its fragmentation, with mold pressing or extrusion calendaring, and the method for biaxial tension, make the film of all size thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90102967 CN1016911B (en) | 1990-10-22 | 1990-10-22 | Film with high dielectric constant and low dielectric loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90102967 CN1016911B (en) | 1990-10-22 | 1990-10-22 | Film with high dielectric constant and low dielectric loss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1050462A CN1050462A (en) | 1991-04-03 |
| CN1016911B true CN1016911B (en) | 1992-06-03 |
Family
ID=4877837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90102967 Expired CN1016911B (en) | 1990-10-22 | 1990-10-22 | Film with high dielectric constant and low dielectric loss |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1016911B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430317C (en) * | 2001-08-13 | 2008-11-05 | 罗狄亚化学公司 | Method of preparing silicas, silicas with specific pore-size distribution and use thereof in particular for reinforcing polymers |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106967254B (en) * | 2017-04-19 | 2019-03-29 | 哈尔滨工业大学 | A kind of preparation method of the modified PB-1 film of high dielectric constant carbon nano-fiber |
| CN114230946B (en) * | 2021-12-28 | 2023-06-16 | 清华大学 | All-organic composite material film and preparation method and application thereof |
-
1990
- 1990-10-22 CN CN 90102967 patent/CN1016911B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430317C (en) * | 2001-08-13 | 2008-11-05 | 罗狄亚化学公司 | Method of preparing silicas, silicas with specific pore-size distribution and use thereof in particular for reinforcing polymers |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1050462A (en) | 1991-04-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101597379B (en) | Manufacturing method of colored polytetrafluoroethylene (PTFE) thread seal tape for winding and sintering | |
| CN102504407A (en) | Polypropylene composition for solar battery and preparation method thereof | |
| CN106633338A (en) | Conductive polymeric material and preparation method therefor | |
| CN110818998B (en) | Preparation method of polypropylene/carbon nanotube fiber composite material | |
| CN109852032A (en) | A kind of polyphenylene oxide resin based composites and its preparation method and application | |
| CN114369267B (en) | Ternary composite film material and preparation method and application thereof | |
| CN1016911B (en) | Film with high dielectric constant and low dielectric loss | |
| CN103408949B (en) | Ultrahigh hardness rubber unvulcanizate and preparation method thereof | |
| CN116875027A (en) | Dielectric flame-retardant composite material and preparation method thereof | |
| CN101699635B (en) | Insulating back panel of solar photovoltaic cell and preparation method thereof | |
| CN115216133A (en) | Preparation method of polyphenyl ether composite material for high-pressure-strength water supply pipeline | |
| CN105153604A (en) | Dielectric composite material based on carbon nanotube | |
| CN109535463A (en) | A kind of preparation method of TPU conductive film | |
| CN115522276A (en) | Preparation method of conductive and reinforced PBT fiber | |
| CN109401142B (en) | PVDF (polyvinylidene fluoride) based composite material with sea-island structure and preparation method thereof | |
| CN114350125A (en) | Hydrophobic environment-friendly degradable composite packaging film | |
| CN113088107A (en) | Second-level composite modifier with antibacterial property and application thereof in coating modified filler | |
| CN111849093A (en) | Nylon 1/polyvinylidene fluoride composite dielectric film and preparation method thereof | |
| CN112680059A (en) | Insulating flame-retardant powder coating | |
| CN112679872A (en) | Antistatic plastic battery case and production method thereof | |
| CN111187503A (en) | Packaging winding film and preparation method thereof | |
| CN110845848A (en) | Carbon fiber composite material and preparation method thereof | |
| CN86100550A (en) | Fluoroine-containing plastic alloy and manufacturing thereof | |
| CN117209899B (en) | Metallized film for reactive compensation capacitor and preparation method thereof | |
| WO2024048935A1 (en) | Graphite composite material composition for fuel cell separator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |